| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Edward Cree | 13046 | 89.56% | 55 | 70.51% |
| Pieter Jansen van Vuuren | 1042 | 7.15% | 8 | 10.26% |
| Ben Hutchings | 363 | 2.49% | 5 | 6.41% |
| Jonathan Cooper | 37 | 0.25% | 3 | 3.85% |
| Ratheesh Kannoth | 32 | 0.22% | 1 | 1.28% |
| Alejandro Lucero | 22 | 0.15% | 1 | 1.28% |
| Jakub Kiciński | 13 | 0.09% | 1 | 1.28% |
| Asbjörn Sloth Tönnesen | 10 | 0.07% | 2 | 2.56% |
| Bert Kenward | 1 | 0.01% | 1 | 1.28% |
| Thomas Gleixner | 1 | 0.01% | 1 | 1.28% |
| Total | 14567 | 78 |
// SPDX-License-Identifier: GPL-2.0-only /**************************************************************************** * Driver for Solarflare network controllers and boards * Copyright 2019 Solarflare Communications Inc. * Copyright 2020-2022 Xilinx Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation, incorporated herein by reference. */ #include <net/pkt_cls.h> #include <net/vxlan.h> #include <net/geneve.h> #include <net/tc_act/tc_ct.h> #include "tc.h" #include "tc_bindings.h" #include "tc_encap_actions.h" #include "tc_conntrack.h" #include "mae.h" #include "ef100_rep.h" #include "efx.h" enum efx_encap_type efx_tc_indr_netdev_type(struct net_device *net_dev) { if (netif_is_vxlan(net_dev)) return EFX_ENCAP_TYPE_VXLAN; if (netif_is_geneve(net_dev)) return EFX_ENCAP_TYPE_GENEVE; return EFX_ENCAP_TYPE_NONE; } #define EFX_TC_HDR_TYPE_TTL_MASK ((u32)0xff) /* Hoplimit is stored in the most significant byte in the pedit ipv6 header action */ #define EFX_TC_HDR_TYPE_HLIMIT_MASK ~((u32)0xff000000) #define EFX_EFV_PF NULL /* Look up the representor information (efv) for a device. * May return NULL for the PF (us), or an error pointer for a device that * isn't supported as a TC offload endpoint */ struct efx_rep *efx_tc_flower_lookup_efv(struct efx_nic *efx, struct net_device *dev) { struct efx_rep *efv; if (!dev) return ERR_PTR(-EOPNOTSUPP); /* Is it us (the PF)? */ if (dev == efx->net_dev) return EFX_EFV_PF; /* Is it an efx vfrep at all? */ if (dev->netdev_ops != &efx_ef100_rep_netdev_ops) return ERR_PTR(-EOPNOTSUPP); /* Is it ours? We don't support TC rules that include another * EF100's netdevices (not even on another port of the same NIC). */ efv = netdev_priv(dev); if (efv->parent != efx) return ERR_PTR(-EOPNOTSUPP); return efv; } /* Convert a driver-internal vport ID into an internal device (PF or VF) */ static s64 efx_tc_flower_internal_mport(struct efx_nic *efx, struct efx_rep *efv) { u32 mport; if (IS_ERR(efv)) return PTR_ERR(efv); if (!efv) /* device is PF (us) */ efx_mae_mport_uplink(efx, &mport); else /* device is repr */ efx_mae_mport_mport(efx, efv->mport, &mport); return mport; } /* Convert a driver-internal vport ID into an external device (wire or VF) */ s64 efx_tc_flower_external_mport(struct efx_nic *efx, struct efx_rep *efv) { u32 mport; if (IS_ERR(efv)) return PTR_ERR(efv); if (!efv) /* device is PF (us) */ efx_mae_mport_wire(efx, &mport); else /* device is repr */ efx_mae_mport_mport(efx, efv->mport, &mport); return mport; } static const struct rhashtable_params efx_tc_mac_ht_params = { .key_len = offsetofend(struct efx_tc_mac_pedit_action, h_addr), .key_offset = 0, .head_offset = offsetof(struct efx_tc_mac_pedit_action, linkage), }; static const struct rhashtable_params efx_tc_encap_match_ht_params = { .key_len = offsetof(struct efx_tc_encap_match, linkage), .key_offset = 0, .head_offset = offsetof(struct efx_tc_encap_match, linkage), }; static const struct rhashtable_params efx_tc_match_action_ht_params = { .key_len = sizeof(unsigned long), .key_offset = offsetof(struct efx_tc_flow_rule, cookie), .head_offset = offsetof(struct efx_tc_flow_rule, linkage), }; static const struct rhashtable_params efx_tc_lhs_rule_ht_params = { .key_len = sizeof(unsigned long), .key_offset = offsetof(struct efx_tc_lhs_rule, cookie), .head_offset = offsetof(struct efx_tc_lhs_rule, linkage), }; static const struct rhashtable_params efx_tc_recirc_ht_params = { .key_len = offsetof(struct efx_tc_recirc_id, linkage), .key_offset = 0, .head_offset = offsetof(struct efx_tc_recirc_id, linkage), }; static struct efx_tc_mac_pedit_action *efx_tc_flower_get_mac(struct efx_nic *efx, unsigned char h_addr[ETH_ALEN], struct netlink_ext_ack *extack) { struct efx_tc_mac_pedit_action *ped, *old; int rc; ped = kzalloc(sizeof(*ped), GFP_USER); if (!ped) return ERR_PTR(-ENOMEM); memcpy(ped->h_addr, h_addr, ETH_ALEN); old = rhashtable_lookup_get_insert_fast(&efx->tc->mac_ht, &ped->linkage, efx_tc_mac_ht_params); if (old) { /* don't need our new entry */ kfree(ped); if (IS_ERR(old)) /* oh dear, it's actually an error */ return ERR_CAST(old); if (!refcount_inc_not_zero(&old->ref)) return ERR_PTR(-EAGAIN); /* existing entry found, ref taken */ return old; } rc = efx_mae_allocate_pedit_mac(efx, ped); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to store pedit MAC address in hw"); goto out_remove; } /* ref and return */ refcount_set(&ped->ref, 1); return ped; out_remove: rhashtable_remove_fast(&efx->tc->mac_ht, &ped->linkage, efx_tc_mac_ht_params); kfree(ped); return ERR_PTR(rc); } static void efx_tc_flower_put_mac(struct efx_nic *efx, struct efx_tc_mac_pedit_action *ped) { if (!refcount_dec_and_test(&ped->ref)) return; /* still in use */ rhashtable_remove_fast(&efx->tc->mac_ht, &ped->linkage, efx_tc_mac_ht_params); efx_mae_free_pedit_mac(efx, ped); kfree(ped); } static void efx_tc_free_action_set(struct efx_nic *efx, struct efx_tc_action_set *act, bool in_hw) { /* Failure paths calling this on the 'cursor' action set in_hw=false, * because if the alloc had succeeded we'd've put it in acts.list and * not still have it in act. */ if (in_hw) { efx_mae_free_action_set(efx, act->fw_id); /* in_hw is true iff we are on an acts.list; make sure to * remove ourselves from that list before we are freed. */ list_del(&act->list); } if (act->count) { spin_lock_bh(&act->count->cnt->lock); if (!list_empty(&act->count_user)) list_del(&act->count_user); spin_unlock_bh(&act->count->cnt->lock); efx_tc_flower_put_counter_index(efx, act->count); } if (act->encap_md) { list_del(&act->encap_user); efx_tc_flower_release_encap_md(efx, act->encap_md); } if (act->src_mac) efx_tc_flower_put_mac(efx, act->src_mac); if (act->dst_mac) efx_tc_flower_put_mac(efx, act->dst_mac); kfree(act); } static void efx_tc_free_action_set_list(struct efx_nic *efx, struct efx_tc_action_set_list *acts, bool in_hw) { struct efx_tc_action_set *act, *next; /* Failure paths set in_hw=false, because usually the acts didn't get * to efx_mae_alloc_action_set_list(); if they did, the failure tree * has a separate efx_mae_free_action_set_list() before calling us. */ if (in_hw) efx_mae_free_action_set_list(efx, acts); /* Any act that's on the list will be in_hw even if the list isn't */ list_for_each_entry_safe(act, next, &acts->list, list) efx_tc_free_action_set(efx, act, true); /* Don't kfree, as acts is embedded inside a struct efx_tc_flow_rule */ } /* Boilerplate for the simple 'copy a field' cases */ #define _MAP_KEY_AND_MASK(_name, _type, _tcget, _tcfield, _field) \ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_##_name)) { \ struct flow_match_##_type fm; \ \ flow_rule_match_##_tcget(rule, &fm); \ match->value._field = fm.key->_tcfield; \ match->mask._field = fm.mask->_tcfield; \ } #define MAP_KEY_AND_MASK(_name, _type, _tcfield, _field) \ _MAP_KEY_AND_MASK(_name, _type, _type, _tcfield, _field) #define MAP_ENC_KEY_AND_MASK(_name, _type, _tcget, _tcfield, _field) \ _MAP_KEY_AND_MASK(ENC_##_name, _type, _tcget, _tcfield, _field) static int efx_tc_flower_parse_match(struct efx_nic *efx, struct flow_rule *rule, struct efx_tc_match *match, struct netlink_ext_ack *extack) { struct flow_dissector *dissector = rule->match.dissector; unsigned char ipv = 0; /* Owing to internal TC infelicities, the IPV6_ADDRS key might be set * even on IPv4 filters; so rather than relying on dissector->used_keys * we check the addr_type in the CONTROL key. If we don't find it (or * it's masked, which should never happen), we treat both IPV4_ADDRS * and IPV6_ADDRS as absent. */ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { struct flow_match_control fm; flow_rule_match_control(rule, &fm); if (IS_ALL_ONES(fm.mask->addr_type)) switch (fm.key->addr_type) { case FLOW_DISSECTOR_KEY_IPV4_ADDRS: ipv = 4; break; case FLOW_DISSECTOR_KEY_IPV6_ADDRS: ipv = 6; break; default: break; } if (fm.mask->flags & FLOW_DIS_IS_FRAGMENT) { match->value.ip_frag = fm.key->flags & FLOW_DIS_IS_FRAGMENT; match->mask.ip_frag = true; } if (fm.mask->flags & FLOW_DIS_FIRST_FRAG) { match->value.ip_firstfrag = fm.key->flags & FLOW_DIS_FIRST_FRAG; match->mask.ip_firstfrag = true; } if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG, fm.mask->flags, extack)) return -EOPNOTSUPP; } if (dissector->used_keys & ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) | BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) | BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) | BIT_ULL(FLOW_DISSECTOR_KEY_CVLAN) | BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IP) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_PORTS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL) | BIT_ULL(FLOW_DISSECTOR_KEY_CT) | BIT_ULL(FLOW_DISSECTOR_KEY_TCP) | BIT_ULL(FLOW_DISSECTOR_KEY_IP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported flower keys %#llx", dissector->used_keys); return -EOPNOTSUPP; } MAP_KEY_AND_MASK(BASIC, basic, n_proto, eth_proto); /* Make sure we're IP if any L3/L4 keys used. */ if (!IS_ALL_ONES(match->mask.eth_proto) || !(match->value.eth_proto == htons(ETH_P_IP) || match->value.eth_proto == htons(ETH_P_IPV6))) if (dissector->used_keys & (BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) | BIT_ULL(FLOW_DISSECTOR_KEY_IP) | BIT_ULL(FLOW_DISSECTOR_KEY_TCP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "L3/L4 flower keys %#llx require protocol ipv[46]", dissector->used_keys); return -EINVAL; } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { struct flow_match_vlan fm; flow_rule_match_vlan(rule, &fm); if (fm.mask->vlan_id || fm.mask->vlan_priority || fm.mask->vlan_tpid) { match->value.vlan_proto[0] = fm.key->vlan_tpid; match->mask.vlan_proto[0] = fm.mask->vlan_tpid; match->value.vlan_tci[0] = cpu_to_be16(fm.key->vlan_priority << 13 | fm.key->vlan_id); match->mask.vlan_tci[0] = cpu_to_be16(fm.mask->vlan_priority << 13 | fm.mask->vlan_id); } } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) { struct flow_match_vlan fm; flow_rule_match_cvlan(rule, &fm); if (fm.mask->vlan_id || fm.mask->vlan_priority || fm.mask->vlan_tpid) { match->value.vlan_proto[1] = fm.key->vlan_tpid; match->mask.vlan_proto[1] = fm.mask->vlan_tpid; match->value.vlan_tci[1] = cpu_to_be16(fm.key->vlan_priority << 13 | fm.key->vlan_id); match->mask.vlan_tci[1] = cpu_to_be16(fm.mask->vlan_priority << 13 | fm.mask->vlan_id); } } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { struct flow_match_eth_addrs fm; flow_rule_match_eth_addrs(rule, &fm); ether_addr_copy(match->value.eth_saddr, fm.key->src); ether_addr_copy(match->value.eth_daddr, fm.key->dst); ether_addr_copy(match->mask.eth_saddr, fm.mask->src); ether_addr_copy(match->mask.eth_daddr, fm.mask->dst); } MAP_KEY_AND_MASK(BASIC, basic, ip_proto, ip_proto); /* Make sure we're TCP/UDP if any L4 keys used. */ if ((match->value.ip_proto != IPPROTO_UDP && match->value.ip_proto != IPPROTO_TCP) || !IS_ALL_ONES(match->mask.ip_proto)) if (dissector->used_keys & (BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) | BIT_ULL(FLOW_DISSECTOR_KEY_TCP))) { NL_SET_ERR_MSG_FMT_MOD(extack, "L4 flower keys %#llx require ipproto udp or tcp", dissector->used_keys); return -EINVAL; } MAP_KEY_AND_MASK(IP, ip, tos, ip_tos); MAP_KEY_AND_MASK(IP, ip, ttl, ip_ttl); if (ipv == 4) { MAP_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, src, src_ip); MAP_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, dst, dst_ip); } #ifdef CONFIG_IPV6 else if (ipv == 6) { MAP_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, src, src_ip6); MAP_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, dst, dst_ip6); } #endif MAP_KEY_AND_MASK(PORTS, ports, src, l4_sport); MAP_KEY_AND_MASK(PORTS, ports, dst, l4_dport); MAP_KEY_AND_MASK(TCP, tcp, flags, tcp_flags); if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) { struct flow_match_control fm; flow_rule_match_enc_control(rule, &fm); if (flow_rule_has_enc_control_flags(fm.mask->flags, extack)) return -EOPNOTSUPP; if (!IS_ALL_ONES(fm.mask->addr_type)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported enc addr_type mask %u (key %u)", fm.mask->addr_type, fm.key->addr_type); return -EOPNOTSUPP; } switch (fm.key->addr_type) { case FLOW_DISSECTOR_KEY_IPV4_ADDRS: MAP_ENC_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, enc_ipv4_addrs, src, enc_src_ip); MAP_ENC_KEY_AND_MASK(IPV4_ADDRS, ipv4_addrs, enc_ipv4_addrs, dst, enc_dst_ip); break; #ifdef CONFIG_IPV6 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: MAP_ENC_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, enc_ipv6_addrs, src, enc_src_ip6); MAP_ENC_KEY_AND_MASK(IPV6_ADDRS, ipv6_addrs, enc_ipv6_addrs, dst, enc_dst_ip6); break; #endif default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported enc addr_type %u (supported are IPv4, IPv6)", fm.key->addr_type); return -EOPNOTSUPP; } MAP_ENC_KEY_AND_MASK(IP, ip, enc_ip, tos, enc_ip_tos); MAP_ENC_KEY_AND_MASK(IP, ip, enc_ip, ttl, enc_ip_ttl); MAP_ENC_KEY_AND_MASK(PORTS, ports, enc_ports, src, enc_sport); MAP_ENC_KEY_AND_MASK(PORTS, ports, enc_ports, dst, enc_dport); MAP_ENC_KEY_AND_MASK(KEYID, enc_keyid, enc_keyid, keyid, enc_keyid); } else if (dissector->used_keys & (BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IP) | BIT_ULL(FLOW_DISSECTOR_KEY_ENC_PORTS))) { NL_SET_ERR_MSG_FMT_MOD(extack, "Flower enc keys require enc_control (keys: %#llx)", dissector->used_keys); return -EOPNOTSUPP; } if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CT)) { struct flow_match_ct fm; flow_rule_match_ct(rule, &fm); match->value.ct_state_trk = !!(fm.key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED); match->mask.ct_state_trk = !!(fm.mask->ct_state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED); match->value.ct_state_est = !!(fm.key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED); match->mask.ct_state_est = !!(fm.mask->ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED); if (fm.mask->ct_state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unsupported ct_state match %#x", fm.mask->ct_state); return -EOPNOTSUPP; } match->value.ct_mark = fm.key->ct_mark; match->mask.ct_mark = fm.mask->ct_mark; match->value.ct_zone = fm.key->ct_zone; match->mask.ct_zone = fm.mask->ct_zone; if (memchr_inv(fm.mask->ct_labels, 0, sizeof(fm.mask->ct_labels))) { NL_SET_ERR_MSG_MOD(extack, "Matching on ct_label not supported"); return -EOPNOTSUPP; } } return 0; } static void efx_tc_flower_release_encap_match(struct efx_nic *efx, struct efx_tc_encap_match *encap) { int rc; if (!refcount_dec_and_test(&encap->ref)) return; /* still in use */ if (encap->type == EFX_TC_EM_DIRECT) { rc = efx_mae_unregister_encap_match(efx, encap); if (rc) /* Display message but carry on and remove entry from our * SW tables, because there's not much we can do about it. */ netif_err(efx, drv, efx->net_dev, "Failed to release encap match %#x, rc %d\n", encap->fw_id, rc); } rhashtable_remove_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); if (encap->pseudo) efx_tc_flower_release_encap_match(efx, encap->pseudo); kfree(encap); } static int efx_tc_flower_record_encap_match(struct efx_nic *efx, struct efx_tc_match *match, enum efx_encap_type type, enum efx_tc_em_pseudo_type em_type, u8 child_ip_tos_mask, __be16 child_udp_sport_mask, struct netlink_ext_ack *extack) { struct efx_tc_encap_match *encap, *old, *pseudo = NULL; bool ipv6 = false; int rc; /* We require that the socket-defining fields (IP addrs and UDP dest * port) are present and exact-match. Other fields may only be used * if the field-set (and any masks) are the same for all encap * matches on the same <sip,dip,dport> tuple; this is enforced by * pseudo encap matches. */ if (match->mask.enc_dst_ip | match->mask.enc_src_ip) { if (!IS_ALL_ONES(match->mask.enc_dst_ip)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst IP address"); return -EOPNOTSUPP; } if (!IS_ALL_ONES(match->mask.enc_src_ip)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on src IP address"); return -EOPNOTSUPP; } #ifdef CONFIG_IPV6 if (!ipv6_addr_any(&match->mask.enc_dst_ip6) || !ipv6_addr_any(&match->mask.enc_src_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on both IPv4 and IPv6, don't understand"); return -EOPNOTSUPP; } } else { ipv6 = true; if (!efx_ipv6_addr_all_ones(&match->mask.enc_dst_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst IP address"); return -EOPNOTSUPP; } if (!efx_ipv6_addr_all_ones(&match->mask.enc_src_ip6)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on src IP address"); return -EOPNOTSUPP; } #endif } if (!IS_ALL_ONES(match->mask.enc_dport)) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match is not exact on dst UDP port"); return -EOPNOTSUPP; } if (match->mask.enc_sport || match->mask.enc_ip_tos) { struct efx_tc_match pmatch = *match; if (em_type == EFX_TC_EM_PSEUDO_MASK) { /* can't happen */ NL_SET_ERR_MSG_MOD(extack, "Bad recursion in egress encap match handler"); return -EOPNOTSUPP; } pmatch.value.enc_ip_tos = 0; pmatch.mask.enc_ip_tos = 0; pmatch.value.enc_sport = 0; pmatch.mask.enc_sport = 0; rc = efx_tc_flower_record_encap_match(efx, &pmatch, type, EFX_TC_EM_PSEUDO_MASK, match->mask.enc_ip_tos, match->mask.enc_sport, extack); if (rc) return rc; pseudo = pmatch.encap; } if (match->mask.enc_ip_ttl) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on IP TTL not supported"); rc = -EOPNOTSUPP; goto fail_pseudo; } rc = efx_mae_check_encap_match_caps(efx, ipv6, match->mask.enc_ip_tos, match->mask.enc_sport, extack); if (rc) goto fail_pseudo; encap = kzalloc(sizeof(*encap), GFP_USER); if (!encap) { rc = -ENOMEM; goto fail_pseudo; } encap->src_ip = match->value.enc_src_ip; encap->dst_ip = match->value.enc_dst_ip; #ifdef CONFIG_IPV6 encap->src_ip6 = match->value.enc_src_ip6; encap->dst_ip6 = match->value.enc_dst_ip6; #endif encap->udp_dport = match->value.enc_dport; encap->tun_type = type; encap->ip_tos = match->value.enc_ip_tos; encap->ip_tos_mask = match->mask.enc_ip_tos; encap->child_ip_tos_mask = child_ip_tos_mask; encap->udp_sport = match->value.enc_sport; encap->udp_sport_mask = match->mask.enc_sport; encap->child_udp_sport_mask = child_udp_sport_mask; encap->type = em_type; encap->pseudo = pseudo; old = rhashtable_lookup_get_insert_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); if (old) { /* don't need our new entry */ kfree(encap); if (pseudo) /* don't need our new pseudo either */ efx_tc_flower_release_encap_match(efx, pseudo); if (IS_ERR(old)) /* oh dear, it's actually an error */ return PTR_ERR(old); /* check old and new em_types are compatible */ switch (old->type) { case EFX_TC_EM_DIRECT: /* old EM is in hardware, so mustn't overlap with a * pseudo, but may be shared with another direct EM */ if (em_type == EFX_TC_EM_DIRECT) break; NL_SET_ERR_MSG_MOD(extack, "Pseudo encap match conflicts with existing direct entry"); return -EEXIST; case EFX_TC_EM_PSEUDO_MASK: /* old EM is protecting a ToS- or src port-qualified * filter, so may only be shared with another pseudo * for the same ToS and src port masks. */ if (em_type != EFX_TC_EM_PSEUDO_MASK) { NL_SET_ERR_MSG_FMT_MOD(extack, "%s encap match conflicts with existing pseudo(MASK) entry", em_type ? "Pseudo" : "Direct"); return -EEXIST; } if (child_ip_tos_mask != old->child_ip_tos_mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "Pseudo encap match for TOS mask %#04x conflicts with existing mask %#04x", child_ip_tos_mask, old->child_ip_tos_mask); return -EEXIST; } if (child_udp_sport_mask != old->child_udp_sport_mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "Pseudo encap match for UDP src port mask %#x conflicts with existing mask %#x", child_udp_sport_mask, old->child_udp_sport_mask); return -EEXIST; } break; case EFX_TC_EM_PSEUDO_OR: /* old EM corresponds to an OR that has to be unique * (it must not overlap with any other OR, whether * direct-EM or pseudo). */ NL_SET_ERR_MSG_FMT_MOD(extack, "%s encap match conflicts with existing pseudo(OR) entry", em_type ? "Pseudo" : "Direct"); return -EEXIST; default: /* Unrecognised pseudo-type. Just say no */ NL_SET_ERR_MSG_FMT_MOD(extack, "%s encap match conflicts with existing pseudo(%d) entry", em_type ? "Pseudo" : "Direct", old->type); return -EEXIST; } /* check old and new tun_types are compatible */ if (old->tun_type != type) { NL_SET_ERR_MSG_FMT_MOD(extack, "Egress encap match with conflicting tun_type %u != %u", old->tun_type, type); return -EEXIST; } if (!refcount_inc_not_zero(&old->ref)) return -EAGAIN; /* existing entry found */ encap = old; } else { if (em_type == EFX_TC_EM_DIRECT) { rc = efx_mae_register_encap_match(efx, encap); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to record egress encap match in HW"); goto fail; } } refcount_set(&encap->ref, 1); } match->encap = encap; return 0; fail: rhashtable_remove_fast(&efx->tc->encap_match_ht, &encap->linkage, efx_tc_encap_match_ht_params); kfree(encap); fail_pseudo: if (pseudo) efx_tc_flower_release_encap_match(efx, pseudo); return rc; } static struct efx_tc_recirc_id *efx_tc_get_recirc_id(struct efx_nic *efx, u32 chain_index, struct net_device *net_dev) { struct efx_tc_recirc_id *rid, *old; int rc; rid = kzalloc(sizeof(*rid), GFP_USER); if (!rid) return ERR_PTR(-ENOMEM); rid->chain_index = chain_index; /* We don't take a reference here, because it's implied - if there's * a rule on the net_dev that's been offloaded to us, then the net_dev * can't go away until the rule has been deoffloaded. */ rid->net_dev = net_dev; old = rhashtable_lookup_get_insert_fast(&efx->tc->recirc_ht, &rid->linkage, efx_tc_recirc_ht_params); if (old) { /* don't need our new entry */ kfree(rid); if (IS_ERR(old)) /* oh dear, it's actually an error */ return ERR_CAST(old); if (!refcount_inc_not_zero(&old->ref)) return ERR_PTR(-EAGAIN); /* existing entry found */ rid = old; } else { rc = ida_alloc_range(&efx->tc->recirc_ida, 1, U8_MAX, GFP_USER); if (rc < 0) { rhashtable_remove_fast(&efx->tc->recirc_ht, &rid->linkage, efx_tc_recirc_ht_params); kfree(rid); return ERR_PTR(rc); } rid->fw_id = rc; refcount_set(&rid->ref, 1); } return rid; } static void efx_tc_put_recirc_id(struct efx_nic *efx, struct efx_tc_recirc_id *rid) { if (!refcount_dec_and_test(&rid->ref)) return; /* still in use */ rhashtable_remove_fast(&efx->tc->recirc_ht, &rid->linkage, efx_tc_recirc_ht_params); ida_free(&efx->tc->recirc_ida, rid->fw_id); kfree(rid); } static void efx_tc_delete_rule(struct efx_nic *efx, struct efx_tc_flow_rule *rule) { efx_mae_delete_rule(efx, rule->fw_id); /* Release entries in subsidiary tables */ efx_tc_free_action_set_list(efx, &rule->acts, true); if (rule->match.rid) efx_tc_put_recirc_id(efx, rule->match.rid); if (rule->match.encap) efx_tc_flower_release_encap_match(efx, rule->match.encap); rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; } static const char *efx_tc_encap_type_name(enum efx_encap_type typ) { switch (typ) { case EFX_ENCAP_TYPE_NONE: return "none"; case EFX_ENCAP_TYPE_VXLAN: return "vxlan"; case EFX_ENCAP_TYPE_GENEVE: return "geneve"; default: pr_warn_once("Unknown efx_encap_type %d encountered\n", typ); return "unknown"; } } /* For details of action order constraints refer to SF-123102-TC-1§12.6.1 */ enum efx_tc_action_order { EFX_TC_AO_DECAP, EFX_TC_AO_DEC_TTL, EFX_TC_AO_PEDIT_MAC_ADDRS, EFX_TC_AO_VLAN_POP, EFX_TC_AO_VLAN_PUSH, EFX_TC_AO_COUNT, EFX_TC_AO_ENCAP, EFX_TC_AO_DELIVER }; /* Determine whether we can add @new action without violating order */ static bool efx_tc_flower_action_order_ok(const struct efx_tc_action_set *act, enum efx_tc_action_order new) { switch (new) { case EFX_TC_AO_DECAP: if (act->decap) return false; /* PEDIT_MAC_ADDRS must not happen before DECAP, though it * can wait until much later */ if (act->dst_mac || act->src_mac) return false; /* Decrementing ttl must not happen before DECAP */ if (act->do_ttl_dec) return false; fallthrough; case EFX_TC_AO_VLAN_POP: if (act->vlan_pop >= 2) return false; /* If we've already pushed a VLAN, we can't then pop it; * the hardware would instead try to pop an existing VLAN * before pushing the new one. */ if (act->vlan_push) return false; fallthrough; case EFX_TC_AO_VLAN_PUSH: if (act->vlan_push >= 2) return false; fallthrough; case EFX_TC_AO_COUNT: if (act->count) return false; fallthrough; case EFX_TC_AO_PEDIT_MAC_ADDRS: case EFX_TC_AO_ENCAP: if (act->encap_md) return false; fallthrough; case EFX_TC_AO_DELIVER: return !act->deliver; case EFX_TC_AO_DEC_TTL: if (act->encap_md) return false; return !act->do_ttl_dec; default: /* Bad caller. Whatever they wanted to do, say they can't. */ WARN_ON_ONCE(1); return false; } } /** * DOC: TC conntrack sequences * * The MAE hardware can handle at most two rounds of action rule matching, * consequently we support conntrack through the notion of a "left-hand side * rule". This is a rule which typically contains only the actions "ct" and * "goto chain N", and corresponds to one or more "right-hand side rules" in * chain N, which typically match on +trk+est, and may perform ct(nat) actions. * RHS rules go in the Action Rule table as normal but with a nonzero recirc_id * (the hardware equivalent of chain_index), while LHS rules may go in either * the Action Rule or the Outer Rule table, the latter being preferred for * performance reasons, and set both DO_CT and a recirc_id in their response. * * Besides the RHS rules, there are often also similar rules matching on * +trk+new which perform the ct(commit) action. These are not offloaded. */ static bool efx_tc_rule_is_lhs_rule(struct flow_rule *fr, struct efx_tc_match *match) { const struct flow_action_entry *fa; int i; flow_action_for_each(i, fa, &fr->action) { switch (fa->id) { case FLOW_ACTION_GOTO: return true; case FLOW_ACTION_CT: /* If rule is -trk, or doesn't mention trk at all, then * a CT action implies a conntrack lookup (hence it's an * LHS rule). If rule is +trk, then a CT action could * just be ct(nat) or even ct(commit) (though the latter * can't be offloaded). */ if (!match->mask.ct_state_trk || !match->value.ct_state_trk) return true; break; default: break; } } return false; } /* A foreign LHS rule has matches on enc_ keys at the TC layer (including an * implied match on enc_ip_proto UDP). Translate these into non-enc_ keys, * so that we can use the same MAE machinery as local LHS rules (and so that * the lhs_rules entries have uniform semantics). It may seem odd to do it * this way round, given that the corresponding fields in the MAE MCDIs are * all ENC_, but (a) we don't have enc_L2 or enc_ip_proto in struct * efx_tc_match_fields and (b) semantically an LHS rule doesn't have inner * fields so it's just matching on *the* header rather than the outer header. * Make sure that the non-enc_ keys were not already being matched on, as that * would imply a rule that needed a triple lookup. (Hardware can do that, * with OR-AR-CT-AR, but it halves packet rate so we avoid it where possible; * see efx_tc_flower_flhs_needs_ar().) */ static int efx_tc_flower_translate_flhs_match(struct efx_tc_match *match) { int rc = 0; #define COPY_MASK_AND_VALUE(_key, _ekey) ({ \ if (match->mask._key) { \ rc = -EOPNOTSUPP; \ } else { \ match->mask._key = match->mask._ekey; \ match->mask._ekey = 0; \ match->value._key = match->value._ekey; \ match->value._ekey = 0; \ } \ rc; \ }) #define COPY_FROM_ENC(_key) COPY_MASK_AND_VALUE(_key, enc_##_key) if (match->mask.ip_proto) return -EOPNOTSUPP; match->mask.ip_proto = ~0; match->value.ip_proto = IPPROTO_UDP; if (COPY_FROM_ENC(src_ip) || COPY_FROM_ENC(dst_ip)) return rc; #ifdef CONFIG_IPV6 if (!ipv6_addr_any(&match->mask.src_ip6)) return -EOPNOTSUPP; match->mask.src_ip6 = match->mask.enc_src_ip6; memset(&match->mask.enc_src_ip6, 0, sizeof(struct in6_addr)); if (!ipv6_addr_any(&match->mask.dst_ip6)) return -EOPNOTSUPP; match->mask.dst_ip6 = match->mask.enc_dst_ip6; memset(&match->mask.enc_dst_ip6, 0, sizeof(struct in6_addr)); #endif if (COPY_FROM_ENC(ip_tos) || COPY_FROM_ENC(ip_ttl)) return rc; /* should really copy enc_ip_frag but we don't have that in * parse_match yet */ if (COPY_MASK_AND_VALUE(l4_sport, enc_sport) || COPY_MASK_AND_VALUE(l4_dport, enc_dport)) return rc; return 0; #undef COPY_FROM_ENC #undef COPY_MASK_AND_VALUE } /* If a foreign LHS rule wants to match on keys that are only available after * encap header identification and parsing, then it can't be done in the Outer * Rule lookup, because that lookup determines the encap type used to parse * beyond the outer headers. Thus, such rules must use the OR-AR-CT-AR lookup * sequence, with an EM (struct efx_tc_encap_match) in the OR step. * Return true iff the passed match requires this. */ static bool efx_tc_flower_flhs_needs_ar(struct efx_tc_match *match) { /* matches on inner-header keys can't be done in OR */ return match->mask.eth_proto || match->mask.vlan_tci[0] || match->mask.vlan_tci[1] || match->mask.vlan_proto[0] || match->mask.vlan_proto[1] || memchr_inv(match->mask.eth_saddr, 0, ETH_ALEN) || memchr_inv(match->mask.eth_daddr, 0, ETH_ALEN) || match->mask.ip_proto || match->mask.ip_tos || match->mask.ip_ttl || match->mask.src_ip || match->mask.dst_ip || #ifdef CONFIG_IPV6 !ipv6_addr_any(&match->mask.src_ip6) || !ipv6_addr_any(&match->mask.dst_ip6) || #endif match->mask.ip_frag || match->mask.ip_firstfrag || match->mask.l4_sport || match->mask.l4_dport || match->mask.tcp_flags || /* nor can VNI */ match->mask.enc_keyid; } static int efx_tc_flower_handle_lhs_actions(struct efx_nic *efx, struct flow_cls_offload *tc, struct flow_rule *fr, struct net_device *net_dev, struct efx_tc_lhs_rule *rule) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_lhs_action *act = &rule->lhs_act; const struct flow_action_entry *fa; enum efx_tc_counter_type ctype; bool pipe = true; int i; ctype = rule->is_ar ? EFX_TC_COUNTER_TYPE_AR : EFX_TC_COUNTER_TYPE_OR; flow_action_for_each(i, fa, &fr->action) { struct efx_tc_ct_zone *ct_zone; struct efx_tc_recirc_id *rid; if (!pipe) { /* more actions after a non-pipe action */ NL_SET_ERR_MSG_MOD(extack, "Action follows non-pipe action"); return -EINVAL; } switch (fa->id) { case FLOW_ACTION_GOTO: if (!fa->chain_index) { NL_SET_ERR_MSG_MOD(extack, "Can't goto chain 0, no looping in hw"); return -EOPNOTSUPP; } rid = efx_tc_get_recirc_id(efx, fa->chain_index, net_dev); if (IS_ERR(rid)) { NL_SET_ERR_MSG_MOD(extack, "Failed to allocate a hardware recirculation ID for this chain_index"); return PTR_ERR(rid); } act->rid = rid; if (fa->hw_stats) { struct efx_tc_counter_index *cnt; if (!(fa->hw_stats & FLOW_ACTION_HW_STATS_DELAYED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "hw_stats_type %u not supported (only 'delayed')", fa->hw_stats); return -EOPNOTSUPP; } cnt = efx_tc_flower_get_counter_index(efx, tc->cookie, ctype); if (IS_ERR(cnt)) { NL_SET_ERR_MSG_MOD(extack, "Failed to obtain a counter"); return PTR_ERR(cnt); } WARN_ON(act->count); /* can't happen */ act->count = cnt; } pipe = false; break; case FLOW_ACTION_CT: if (act->zone) { NL_SET_ERR_MSG_MOD(extack, "Can't offload multiple ct actions"); return -EOPNOTSUPP; } if (fa->ct.action & (TCA_CT_ACT_COMMIT | TCA_CT_ACT_FORCE)) { NL_SET_ERR_MSG_MOD(extack, "Can't offload ct commit/force"); return -EOPNOTSUPP; } if (fa->ct.action & TCA_CT_ACT_CLEAR) { NL_SET_ERR_MSG_MOD(extack, "Can't clear ct in LHS rule"); return -EOPNOTSUPP; } if (fa->ct.action & (TCA_CT_ACT_NAT | TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)) { NL_SET_ERR_MSG_MOD(extack, "Can't perform NAT in LHS rule - packet isn't conntracked yet"); return -EOPNOTSUPP; } if (fa->ct.action) { NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled ct.action %u for LHS rule\n", fa->ct.action); return -EOPNOTSUPP; } ct_zone = efx_tc_ct_register_zone(efx, fa->ct.zone, fa->ct.flow_table); if (IS_ERR(ct_zone)) { NL_SET_ERR_MSG_MOD(extack, "Failed to register for CT updates"); return PTR_ERR(ct_zone); } act->zone = ct_zone; break; default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u for LHS rule\n", fa->id); return -EOPNOTSUPP; } } if (pipe) { NL_SET_ERR_MSG_MOD(extack, "Missing goto chain in LHS rule"); return -EOPNOTSUPP; } return 0; } static void efx_tc_flower_release_lhs_actions(struct efx_nic *efx, struct efx_tc_lhs_action *act) { if (act->rid) efx_tc_put_recirc_id(efx, act->rid); if (act->zone) efx_tc_ct_unregister_zone(efx, act->zone); if (act->count) efx_tc_flower_put_counter_index(efx, act->count); } /** * struct efx_tc_mangler_state - accumulates 32-bit pedits into fields * * @dst_mac_32: dst_mac[0:3] has been populated * @dst_mac_16: dst_mac[4:5] has been populated * @src_mac_16: src_mac[0:1] has been populated * @src_mac_32: src_mac[2:5] has been populated * @dst_mac: h_dest field of ethhdr * @src_mac: h_source field of ethhdr * * Since FLOW_ACTION_MANGLE comes in 32-bit chunks that do not * necessarily equate to whole fields of the packet header, this * structure is used to hold the cumulative effect of the partial * field pedits that have been processed so far. */ struct efx_tc_mangler_state { u8 dst_mac_32:1; /* eth->h_dest[0:3] */ u8 dst_mac_16:1; /* eth->h_dest[4:5] */ u8 src_mac_16:1; /* eth->h_source[0:1] */ u8 src_mac_32:1; /* eth->h_source[2:5] */ unsigned char dst_mac[ETH_ALEN]; unsigned char src_mac[ETH_ALEN]; }; /** efx_tc_complete_mac_mangle() - pull complete field pedits out of @mung * @efx: NIC we're installing a flow rule on * @act: action set (cursor) to update * @mung: accumulated partial mangles * @extack: netlink extended ack for reporting errors * * Check @mung to find any combinations of partial mangles that can be * combined into a complete packet field edit, add that edit to @act, * and consume the partial mangles from @mung. */ static int efx_tc_complete_mac_mangle(struct efx_nic *efx, struct efx_tc_action_set *act, struct efx_tc_mangler_state *mung, struct netlink_ext_ack *extack) { struct efx_tc_mac_pedit_action *ped; if (mung->dst_mac_32 && mung->dst_mac_16) { ped = efx_tc_flower_get_mac(efx, mung->dst_mac, extack); if (IS_ERR(ped)) return PTR_ERR(ped); /* Check that we have not already populated dst_mac */ if (act->dst_mac) efx_tc_flower_put_mac(efx, act->dst_mac); act->dst_mac = ped; /* consume the incomplete state */ mung->dst_mac_32 = 0; mung->dst_mac_16 = 0; } if (mung->src_mac_16 && mung->src_mac_32) { ped = efx_tc_flower_get_mac(efx, mung->src_mac, extack); if (IS_ERR(ped)) return PTR_ERR(ped); /* Check that we have not already populated src_mac */ if (act->src_mac) efx_tc_flower_put_mac(efx, act->src_mac); act->src_mac = ped; /* consume the incomplete state */ mung->src_mac_32 = 0; mung->src_mac_16 = 0; } return 0; } static int efx_tc_pedit_add(struct efx_nic *efx, struct efx_tc_action_set *act, const struct flow_action_entry *fa, struct netlink_ext_ack *extack) { switch (fa->mangle.htype) { case FLOW_ACT_MANGLE_HDR_TYPE_IP4: switch (fa->mangle.offset) { case offsetof(struct iphdr, ttl): /* check that pedit applies to ttl only */ if (fa->mangle.mask != ~EFX_TC_HDR_TYPE_TTL_MASK) break; /* Adding 0xff is equivalent to decrementing the ttl. * Other added values are not supported. */ if ((fa->mangle.val & EFX_TC_HDR_TYPE_TTL_MASK) != U8_MAX) break; /* check that we do not decrement ttl twice */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DEC_TTL)) { NL_SET_ERR_MSG_MOD(extack, "multiple dec ttl are not supported"); return -EOPNOTSUPP; } act->do_ttl_dec = 1; return 0; default: break; } break; case FLOW_ACT_MANGLE_HDR_TYPE_IP6: switch (fa->mangle.offset) { case round_down(offsetof(struct ipv6hdr, hop_limit), 4): /* check that pedit applies to hoplimit only */ if (fa->mangle.mask != EFX_TC_HDR_TYPE_HLIMIT_MASK) break; /* Adding 0xff is equivalent to decrementing the hoplimit. * Other added values are not supported. */ if ((fa->mangle.val >> 24) != U8_MAX) break; /* check that we do not decrement hoplimit twice */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DEC_TTL)) { NL_SET_ERR_MSG_MOD(extack, "multiple dec ttl are not supported"); return -EOPNOTSUPP; } act->do_ttl_dec = 1; return 0; default: break; } break; default: break; } NL_SET_ERR_MSG_FMT_MOD(extack, "ttl add action type %x %x %x/%x is not supported", fa->mangle.htype, fa->mangle.offset, fa->mangle.val, fa->mangle.mask); return -EOPNOTSUPP; } /** * efx_tc_mangle() - handle a single 32-bit (or less) pedit * @efx: NIC we're installing a flow rule on * @act: action set (cursor) to update * @fa: FLOW_ACTION_MANGLE action metadata * @mung: accumulator for partial mangles * @extack: netlink extended ack for reporting errors * @match: original match used along with the mangle action * * Identify the fields written by a FLOW_ACTION_MANGLE, and record * the partial mangle state in @mung. If this mangle completes an * earlier partial mangle, consume and apply to @act by calling * efx_tc_complete_mac_mangle(). */ static int efx_tc_mangle(struct efx_nic *efx, struct efx_tc_action_set *act, const struct flow_action_entry *fa, struct efx_tc_mangler_state *mung, struct netlink_ext_ack *extack, struct efx_tc_match *match) { __le32 mac32; __le16 mac16; u8 tr_ttl; switch (fa->mangle.htype) { case FLOW_ACT_MANGLE_HDR_TYPE_ETH: BUILD_BUG_ON(offsetof(struct ethhdr, h_dest) != 0); BUILD_BUG_ON(offsetof(struct ethhdr, h_source) != 6); if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_PEDIT_MAC_ADDRS)) { NL_SET_ERR_MSG_MOD(extack, "Pedit mangle mac action violates action order"); return -EOPNOTSUPP; } switch (fa->mangle.offset) { case 0: if (fa->mangle.mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "mask (%#x) of eth.dst32 mangle is not supported", fa->mangle.mask); return -EOPNOTSUPP; } /* Ethernet address is little-endian */ mac32 = cpu_to_le32(fa->mangle.val); memcpy(mung->dst_mac, &mac32, sizeof(mac32)); mung->dst_mac_32 = 1; return efx_tc_complete_mac_mangle(efx, act, mung, extack); case 4: if (fa->mangle.mask == 0xffff) { mac16 = cpu_to_le16(fa->mangle.val >> 16); memcpy(mung->src_mac, &mac16, sizeof(mac16)); mung->src_mac_16 = 1; } else if (fa->mangle.mask == 0xffff0000) { mac16 = cpu_to_le16((u16)fa->mangle.val); memcpy(mung->dst_mac + 4, &mac16, sizeof(mac16)); mung->dst_mac_16 = 1; } else { NL_SET_ERR_MSG_FMT_MOD(extack, "mask (%#x) of eth+4 mangle is not high or low 16b", fa->mangle.mask); return -EOPNOTSUPP; } return efx_tc_complete_mac_mangle(efx, act, mung, extack); case 8: if (fa->mangle.mask) { NL_SET_ERR_MSG_FMT_MOD(extack, "mask (%#x) of eth.src32 mangle is not supported", fa->mangle.mask); return -EOPNOTSUPP; } mac32 = cpu_to_le32(fa->mangle.val); memcpy(mung->src_mac + 2, &mac32, sizeof(mac32)); mung->src_mac_32 = 1; return efx_tc_complete_mac_mangle(efx, act, mung, extack); default: NL_SET_ERR_MSG_FMT_MOD(extack, "mangle eth+%u %x/%x is not supported", fa->mangle.offset, fa->mangle.val, fa->mangle.mask); return -EOPNOTSUPP; } break; case FLOW_ACT_MANGLE_HDR_TYPE_IP4: switch (fa->mangle.offset) { case offsetof(struct iphdr, ttl): /* we currently only support pedit IP4 when it applies * to TTL and then only when it can be achieved with a * decrement ttl action */ /* check that pedit applies to ttl only */ if (fa->mangle.mask != ~EFX_TC_HDR_TYPE_TTL_MASK) { NL_SET_ERR_MSG_FMT_MOD(extack, "mask (%#x) out of range, only support mangle action on ipv4.ttl", fa->mangle.mask); return -EOPNOTSUPP; } /* we can only convert to a dec ttl when we have an * exact match on the ttl field */ if (match->mask.ip_ttl != U8_MAX) { NL_SET_ERR_MSG_FMT_MOD(extack, "only support mangle ttl when we have an exact match, current mask (%#x)", match->mask.ip_ttl); return -EOPNOTSUPP; } /* check that we don't try to decrement 0, which equates * to setting the ttl to 0xff */ if (match->value.ip_ttl == 0) { NL_SET_ERR_MSG_MOD(extack, "decrement ttl past 0 is not supported"); return -EOPNOTSUPP; } /* check that we do not decrement ttl twice */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DEC_TTL)) { NL_SET_ERR_MSG_MOD(extack, "multiple dec ttl is not supported"); return -EOPNOTSUPP; } /* check pedit can be achieved with decrement action */ tr_ttl = match->value.ip_ttl - 1; if ((fa->mangle.val & EFX_TC_HDR_TYPE_TTL_MASK) == tr_ttl) { act->do_ttl_dec = 1; return 0; } fallthrough; default: NL_SET_ERR_MSG_FMT_MOD(extack, "only support mangle on the ttl field (offset is %u)", fa->mangle.offset); return -EOPNOTSUPP; } break; case FLOW_ACT_MANGLE_HDR_TYPE_IP6: switch (fa->mangle.offset) { case round_down(offsetof(struct ipv6hdr, hop_limit), 4): /* we currently only support pedit IP6 when it applies * to the hoplimit and then only when it can be achieved * with a decrement hoplimit action */ /* check that pedit applies to ttl only */ if (fa->mangle.mask != EFX_TC_HDR_TYPE_HLIMIT_MASK) { NL_SET_ERR_MSG_FMT_MOD(extack, "mask (%#x) out of range, only support mangle action on ipv6.hop_limit", fa->mangle.mask); return -EOPNOTSUPP; } /* we can only convert to a dec ttl when we have an * exact match on the ttl field */ if (match->mask.ip_ttl != U8_MAX) { NL_SET_ERR_MSG_FMT_MOD(extack, "only support hop_limit when we have an exact match, current mask (%#x)", match->mask.ip_ttl); return -EOPNOTSUPP; } /* check that we don't try to decrement 0, which equates * to setting the ttl to 0xff */ if (match->value.ip_ttl == 0) { NL_SET_ERR_MSG_MOD(extack, "decrementing hop_limit past 0 is not supported"); return -EOPNOTSUPP; } /* check that we do not decrement hoplimit twice */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DEC_TTL)) { NL_SET_ERR_MSG_MOD(extack, "multiple dec ttl is not supported"); return -EOPNOTSUPP; } /* check pedit can be achieved with decrement action */ tr_ttl = match->value.ip_ttl - 1; if ((fa->mangle.val >> 24) == tr_ttl) { act->do_ttl_dec = 1; return 0; } fallthrough; default: NL_SET_ERR_MSG_FMT_MOD(extack, "only support mangle on the hop_limit field"); return -EOPNOTSUPP; } default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled mangle htype %u for action rule", fa->mangle.htype); return -EOPNOTSUPP; } return 0; } /** * efx_tc_incomplete_mangle() - check for leftover partial pedits * @mung: accumulator for partial mangles * @extack: netlink extended ack for reporting errors * * Since the MAE can only overwrite whole fields, any partial * field mangle left over on reaching packet delivery (mirred or * end of TC actions) cannot be offloaded. Check for any such * and reject them with -%EOPNOTSUPP. */ static int efx_tc_incomplete_mangle(struct efx_tc_mangler_state *mung, struct netlink_ext_ack *extack) { if (mung->dst_mac_32 || mung->dst_mac_16) { NL_SET_ERR_MSG_MOD(extack, "Incomplete pedit of destination MAC address"); return -EOPNOTSUPP; } if (mung->src_mac_16 || mung->src_mac_32) { NL_SET_ERR_MSG_MOD(extack, "Incomplete pedit of source MAC address"); return -EOPNOTSUPP; } return 0; } static int efx_tc_flower_replace_foreign_lhs_ar(struct efx_nic *efx, struct flow_cls_offload *tc, struct flow_rule *fr, struct efx_tc_match *match, struct net_device *net_dev) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_lhs_rule *rule, *old; enum efx_encap_type type; int rc; type = efx_tc_indr_netdev_type(net_dev); if (type == EFX_ENCAP_TYPE_NONE) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on unsupported tunnel device"); return -EOPNOTSUPP; } rc = efx_mae_check_encap_type_supported(efx, type); if (rc) { NL_SET_ERR_MSG_FMT_MOD(extack, "Firmware reports no support for %s encap match", efx_tc_encap_type_name(type)); return rc; } /* This is an Action Rule, so it needs a separate Encap Match in the * Outer Rule table. Insert that now. */ rc = efx_tc_flower_record_encap_match(efx, match, type, EFX_TC_EM_DIRECT, 0, 0, extack); if (rc) return rc; match->mask.recirc_id = 0xff; if (match->mask.ct_state_trk && match->value.ct_state_trk) { NL_SET_ERR_MSG_MOD(extack, "LHS rule can never match +trk"); rc = -EOPNOTSUPP; goto release_encap_match; } /* LHS rules are always -trk, so we don't need to match on that */ match->mask.ct_state_trk = 0; match->value.ct_state_trk = 0; /* We must inhibit match on TCP SYN/FIN/RST, so that SW can see * the packet and update the conntrack table. * Outer Rules will do that with CT_TCP_FLAGS_INHIBIT, but Action * Rules don't have that; instead they support matching on * TCP_SYN_FIN_RST (aka TCP_INTERESTING_FLAGS), so use that. * This is only strictly needed if there will be a DO_CT action, * which we don't know yet, but typically there will be and it's * simpler not to bother checking here. */ match->mask.tcp_syn_fin_rst = true; rc = efx_mae_match_check_caps(efx, &match->mask, extack); if (rc) goto release_encap_match; rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) { rc = -ENOMEM; goto release_encap_match; } rule->cookie = tc->cookie; rule->is_ar = true; old = rhashtable_lookup_get_insert_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); if (old) { netif_dbg(efx, drv, efx->net_dev, "Already offloaded rule (cookie %lx)\n", tc->cookie); rc = -EEXIST; NL_SET_ERR_MSG_MOD(extack, "Rule already offloaded"); goto release; } /* Parse actions */ rc = efx_tc_flower_handle_lhs_actions(efx, tc, fr, net_dev, rule); if (rc) goto release; rule->match = *match; rule->lhs_act.tun_type = type; rc = efx_mae_insert_lhs_rule(efx, rule, EFX_TC_PRIO_TC); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release; } netif_dbg(efx, drv, efx->net_dev, "Successfully parsed lhs rule (cookie %lx)\n", tc->cookie); return 0; release: efx_tc_flower_release_lhs_actions(efx, &rule->lhs_act); if (!old) rhashtable_remove_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); kfree(rule); release_encap_match: if (match->encap) efx_tc_flower_release_encap_match(efx, match->encap); return rc; } static int efx_tc_flower_replace_foreign_lhs(struct efx_nic *efx, struct flow_cls_offload *tc, struct flow_rule *fr, struct efx_tc_match *match, struct net_device *net_dev) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_lhs_rule *rule, *old; enum efx_encap_type type; int rc; if (tc->common.chain_index) { NL_SET_ERR_MSG_MOD(extack, "LHS rule only allowed in chain 0"); return -EOPNOTSUPP; } if (!efx_tc_match_is_encap(&match->mask)) { /* This is not a tunnel decap rule, ignore it */ netif_dbg(efx, drv, efx->net_dev, "Ignoring foreign LHS filter without encap match\n"); return -EOPNOTSUPP; } if (efx_tc_flower_flhs_needs_ar(match)) return efx_tc_flower_replace_foreign_lhs_ar(efx, tc, fr, match, net_dev); type = efx_tc_indr_netdev_type(net_dev); if (type == EFX_ENCAP_TYPE_NONE) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on unsupported tunnel device\n"); return -EOPNOTSUPP; } rc = efx_mae_check_encap_type_supported(efx, type); if (rc) { NL_SET_ERR_MSG_FMT_MOD(extack, "Firmware reports no support for %s encap match", efx_tc_encap_type_name(type)); return rc; } /* Reserve the outer tuple with a pseudo Encap Match */ rc = efx_tc_flower_record_encap_match(efx, match, type, EFX_TC_EM_PSEUDO_OR, 0, 0, extack); if (rc) return rc; if (match->mask.ct_state_trk && match->value.ct_state_trk) { NL_SET_ERR_MSG_MOD(extack, "LHS rule can never match +trk"); rc = -EOPNOTSUPP; goto release_encap_match; } /* LHS rules are always -trk, so we don't need to match on that */ match->mask.ct_state_trk = 0; match->value.ct_state_trk = 0; rc = efx_tc_flower_translate_flhs_match(match); if (rc) { NL_SET_ERR_MSG_MOD(extack, "LHS rule cannot match on inner fields"); goto release_encap_match; } rc = efx_mae_match_check_caps_lhs(efx, &match->mask, extack); if (rc) goto release_encap_match; rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) { rc = -ENOMEM; goto release_encap_match; } rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); if (old) { netif_dbg(efx, drv, efx->net_dev, "Already offloaded rule (cookie %lx)\n", tc->cookie); rc = -EEXIST; NL_SET_ERR_MSG_MOD(extack, "Rule already offloaded"); goto release; } /* Parse actions */ rc = efx_tc_flower_handle_lhs_actions(efx, tc, fr, net_dev, rule); if (rc) goto release; rule->match = *match; rule->lhs_act.tun_type = type; rc = efx_mae_insert_lhs_rule(efx, rule, EFX_TC_PRIO_TC); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release; } netif_dbg(efx, drv, efx->net_dev, "Successfully parsed lhs rule (cookie %lx)\n", tc->cookie); return 0; release: efx_tc_flower_release_lhs_actions(efx, &rule->lhs_act); if (!old) rhashtable_remove_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); kfree(rule); release_encap_match: if (match->encap) efx_tc_flower_release_encap_match(efx, match->encap); return rc; } static int efx_tc_flower_replace_foreign(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct flow_rule *fr = flow_cls_offload_flow_rule(tc); struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_flow_rule *rule = NULL, *old = NULL; struct efx_tc_action_set *act = NULL; bool found = false, uplinked = false; const struct flow_action_entry *fa; struct efx_tc_match match; struct efx_rep *to_efv; s64 rc; int i; /* Parse match */ memset(&match, 0, sizeof(match)); rc = efx_tc_flower_parse_match(efx, fr, &match, extack); if (rc) return rc; /* The rule as given to us doesn't specify a source netdevice. * But, determining whether packets from a VF should match it is * complicated, so leave those to the software slowpath: qualify * the filter with source m-port == wire. */ rc = efx_tc_flower_external_mport(efx, EFX_EFV_PF); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify ingress m-port for foreign filter"); return rc; } match.value.ingress_port = rc; match.mask.ingress_port = ~0; if (efx_tc_rule_is_lhs_rule(fr, &match)) return efx_tc_flower_replace_foreign_lhs(efx, tc, fr, &match, net_dev); if (tc->common.chain_index) { struct efx_tc_recirc_id *rid; rid = efx_tc_get_recirc_id(efx, tc->common.chain_index, net_dev); if (IS_ERR(rid)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Failed to allocate a hardware recirculation ID for chain_index %u", tc->common.chain_index); return PTR_ERR(rid); } match.rid = rid; match.value.recirc_id = rid->fw_id; } match.mask.recirc_id = 0xff; /* AR table can't match on DO_CT (+trk). But a commonly used pattern is * +trk+est, which is strictly implied by +est, so rewrite it to that. */ if (match.mask.ct_state_trk && match.value.ct_state_trk && match.mask.ct_state_est && match.value.ct_state_est) match.mask.ct_state_trk = 0; /* Thanks to CT_TCP_FLAGS_INHIBIT, packets with interesting flags could * match +trk-est (CT_HIT=0) despite being on an established connection. * So make -est imply -tcp_syn_fin_rst match to ensure these packets * still hit the software path. */ if (match.mask.ct_state_est && !match.value.ct_state_est) { if (match.value.tcp_syn_fin_rst) { /* Can't offload this combination */ NL_SET_ERR_MSG_MOD(extack, "TCP flags and -est conflict for offload"); rc = -EOPNOTSUPP; goto release; } match.mask.tcp_syn_fin_rst = true; } flow_action_for_each(i, fa, &fr->action) { switch (fa->id) { case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: /* mirred means mirror here */ to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); if (IS_ERR(to_efv)) continue; found = true; break; default: break; } } if (!found) { /* We don't care. */ netif_dbg(efx, drv, efx->net_dev, "Ignoring foreign filter that doesn't egdev us\n"); rc = -EOPNOTSUPP; goto release; } rc = efx_mae_match_check_caps(efx, &match.mask, extack); if (rc) goto release; if (efx_tc_match_is_encap(&match.mask)) { enum efx_encap_type type; type = efx_tc_indr_netdev_type(net_dev); if (type == EFX_ENCAP_TYPE_NONE) { NL_SET_ERR_MSG_MOD(extack, "Egress encap match on unsupported tunnel device"); rc = -EOPNOTSUPP; goto release; } rc = efx_mae_check_encap_type_supported(efx, type); if (rc) { NL_SET_ERR_MSG_FMT_MOD(extack, "Firmware reports no support for %s encap match", efx_tc_encap_type_name(type)); goto release; } rc = efx_tc_flower_record_encap_match(efx, &match, type, EFX_TC_EM_DIRECT, 0, 0, extack); if (rc) goto release; } else if (!tc->common.chain_index) { /* This is not a tunnel decap rule, ignore it */ netif_dbg(efx, drv, efx->net_dev, "Ignoring foreign filter without encap match\n"); rc = -EOPNOTSUPP; goto release; } rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) { rc = -ENOMEM; goto release; } INIT_LIST_HEAD(&rule->acts.list); rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); if (IS_ERR(old)) { rc = PTR_ERR(old); goto release; } else if (old) { netif_dbg(efx, drv, efx->net_dev, "Ignoring already-offloaded rule (cookie %lx)\n", tc->cookie); rc = -EEXIST; goto release; } act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } /* Parse actions. For foreign rules we only support decap & redirect. * See corresponding code in efx_tc_flower_replace() for theory of * operation & how 'act' cursor is used. */ flow_action_for_each(i, fa, &fr->action) { struct efx_tc_action_set save; switch (fa->id) { case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: /* See corresponding code in efx_tc_flower_replace() for * long explanations of what's going on here. */ save = *act; if (fa->hw_stats) { struct efx_tc_counter_index *ctr; if (!(fa->hw_stats & FLOW_ACTION_HW_STATS_DELAYED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "hw_stats_type %u not supported (only 'delayed')", fa->hw_stats); rc = -EOPNOTSUPP; goto release; } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_COUNT)) { NL_SET_ERR_MSG_MOD(extack, "Count action violates action order (can't happen)"); rc = -EOPNOTSUPP; goto release; } ctr = efx_tc_flower_get_counter_index(efx, tc->cookie, EFX_TC_COUNTER_TYPE_AR); if (IS_ERR(ctr)) { rc = PTR_ERR(ctr); NL_SET_ERR_MSG_MOD(extack, "Failed to obtain a counter"); goto release; } act->count = ctr; INIT_LIST_HEAD(&act->count_user); } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DELIVER)) { /* can't happen */ rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Deliver action violates action order (can't happen)"); goto release; } to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); /* PF implies egdev is us, in which case we really * want to deliver to the uplink (because this is an * ingress filter). If we don't recognise the egdev * at all, then we'd better trap so SW can handle it. */ if (IS_ERR(to_efv)) to_efv = EFX_EFV_PF; if (to_efv == EFX_EFV_PF) { if (uplinked) break; uplinked = true; } rc = efx_tc_flower_internal_mport(efx, to_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify egress m-port"); goto release; } act->dest_mport = rc; act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (mirred)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; case FLOW_ACTION_TUNNEL_DECAP: if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DECAP)) { rc = -EINVAL; NL_SET_ERR_MSG_MOD(extack, "Decap action violates action order"); goto release; } act->decap = 1; /* If we previously delivered/trapped to uplink, now * that we've decapped we'll want another copy if we * try to deliver/trap to uplink again. */ uplinked = false; break; default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u", fa->id); rc = -EOPNOTSUPP; goto release; } } if (act) { if (!uplinked) { /* Not shot/redirected, so deliver to default dest (which is * the uplink, as this is an ingress filter) */ efx_mae_mport_uplink(efx, &act->dest_mport); act->deliver = 1; } rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (deliver)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* Prevent double-free in error path */ } rule->match = match; netif_dbg(efx, drv, efx->net_dev, "Successfully parsed foreign filter (cookie %lx)\n", tc->cookie); rc = efx_mae_alloc_action_set_list(efx, &rule->acts); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set list to hw"); goto release; } rc = efx_mae_insert_rule(efx, &rule->match, EFX_TC_PRIO_TC, rule->acts.fw_id, &rule->fw_id); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release_acts; } return 0; release_acts: efx_mae_free_action_set_list(efx, &rule->acts); release: /* We failed to insert the rule, so free up any entries we created in * subsidiary tables. */ if (match.rid) efx_tc_put_recirc_id(efx, match.rid); if (act) efx_tc_free_action_set(efx, act, false); if (rule) { if (!old) rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); efx_tc_free_action_set_list(efx, &rule->acts, false); } kfree(rule); if (match.encap) efx_tc_flower_release_encap_match(efx, match.encap); return rc; } static int efx_tc_flower_replace_lhs(struct efx_nic *efx, struct flow_cls_offload *tc, struct flow_rule *fr, struct efx_tc_match *match, struct efx_rep *efv, struct net_device *net_dev) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_lhs_rule *rule, *old; int rc; if (tc->common.chain_index) { NL_SET_ERR_MSG_MOD(extack, "LHS rule only allowed in chain 0"); return -EOPNOTSUPP; } if (match->mask.ct_state_trk && match->value.ct_state_trk) { NL_SET_ERR_MSG_MOD(extack, "LHS rule can never match +trk"); return -EOPNOTSUPP; } /* LHS rules are always -trk, so we don't need to match on that */ match->mask.ct_state_trk = 0; match->value.ct_state_trk = 0; rc = efx_mae_match_check_caps_lhs(efx, &match->mask, extack); if (rc) return rc; rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) return -ENOMEM; rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); if (IS_ERR(old)) { rc = PTR_ERR(old); goto release; } else if (old) { netif_dbg(efx, drv, efx->net_dev, "Already offloaded rule (cookie %lx)\n", tc->cookie); rc = -EEXIST; NL_SET_ERR_MSG_MOD(extack, "Rule already offloaded"); goto release; } /* Parse actions */ /* See note in efx_tc_flower_replace() regarding passed net_dev * (used for efx_tc_get_recirc_id()). */ rc = efx_tc_flower_handle_lhs_actions(efx, tc, fr, efx->net_dev, rule); if (rc) goto release; rule->match = *match; rc = efx_mae_insert_lhs_rule(efx, rule, EFX_TC_PRIO_TC); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release; } netif_dbg(efx, drv, efx->net_dev, "Successfully parsed lhs rule (cookie %lx)\n", tc->cookie); return 0; release: efx_tc_flower_release_lhs_actions(efx, &rule->lhs_act); if (!old) rhashtable_remove_fast(&efx->tc->lhs_rule_ht, &rule->linkage, efx_tc_lhs_rule_ht_params); kfree(rule); return rc; } static int efx_tc_flower_replace(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc, struct efx_rep *efv) { struct flow_rule *fr = flow_cls_offload_flow_rule(tc); struct netlink_ext_ack *extack = tc->common.extack; const struct ip_tunnel_info *encap_info = NULL; struct efx_tc_flow_rule *rule = NULL, *old; struct efx_tc_mangler_state mung = {}; struct efx_tc_action_set *act = NULL; const struct flow_action_entry *fa; struct efx_rep *from_efv, *to_efv; struct efx_tc_match match; u32 acts_id; s64 rc; int i; if (!tc_can_offload_extack(efx->net_dev, extack)) return -EOPNOTSUPP; if (WARN_ON(!efx->tc)) return -ENETDOWN; if (WARN_ON(!efx->tc->up)) return -ENETDOWN; from_efv = efx_tc_flower_lookup_efv(efx, net_dev); if (IS_ERR(from_efv)) { /* Not from our PF or representors, so probably a tunnel dev */ return efx_tc_flower_replace_foreign(efx, net_dev, tc); } if (efv != from_efv) { /* can't happen */ NL_SET_ERR_MSG_FMT_MOD(extack, "for %s efv is %snull but from_efv is %snull (can't happen)", netdev_name(net_dev), efv ? "non-" : "", from_efv ? "non-" : ""); return -EINVAL; } /* Parse match */ memset(&match, 0, sizeof(match)); rc = efx_tc_flower_external_mport(efx, from_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify ingress m-port"); return rc; } match.value.ingress_port = rc; match.mask.ingress_port = ~0; rc = efx_tc_flower_parse_match(efx, fr, &match, extack); if (rc) return rc; if (efx_tc_match_is_encap(&match.mask)) { NL_SET_ERR_MSG_MOD(extack, "Ingress enc_key matches not supported"); return -EOPNOTSUPP; } if (efx_tc_rule_is_lhs_rule(fr, &match)) return efx_tc_flower_replace_lhs(efx, tc, fr, &match, efv, net_dev); /* chain_index 0 is always recirc_id 0 (and does not appear in recirc_ht). * Conveniently, match.rid == NULL and match.value.recirc_id == 0 owing * to the initial memset(), so we don't need to do anything in that case. */ if (tc->common.chain_index) { struct efx_tc_recirc_id *rid; /* Note regarding passed net_dev: * VFreps and PF can share chain namespace, as they have * distinct ingress_mports. So we don't need to burn an * extra recirc_id if both use the same chain_index. * (Strictly speaking, we could give each VFrep its own * recirc_id namespace that doesn't take IDs away from the * PF, but that would require a bunch of additional IDAs - * one for each representor - and that's not likely to be * the main cause of recirc_id exhaustion anyway.) */ rid = efx_tc_get_recirc_id(efx, tc->common.chain_index, efx->net_dev); if (IS_ERR(rid)) { NL_SET_ERR_MSG_FMT_MOD(extack, "Failed to allocate a hardware recirculation ID for chain_index %u", tc->common.chain_index); return PTR_ERR(rid); } match.rid = rid; match.value.recirc_id = rid->fw_id; } match.mask.recirc_id = 0xff; /* AR table can't match on DO_CT (+trk). But a commonly used pattern is * +trk+est, which is strictly implied by +est, so rewrite it to that. */ if (match.mask.ct_state_trk && match.value.ct_state_trk && match.mask.ct_state_est && match.value.ct_state_est) match.mask.ct_state_trk = 0; /* Thanks to CT_TCP_FLAGS_INHIBIT, packets with interesting flags could * match +trk-est (CT_HIT=0) despite being on an established connection. * So make -est imply -tcp_syn_fin_rst match to ensure these packets * still hit the software path. */ if (match.mask.ct_state_est && !match.value.ct_state_est) { if (match.value.tcp_syn_fin_rst) { /* Can't offload this combination */ rc = -EOPNOTSUPP; goto release; } match.mask.tcp_syn_fin_rst = true; } rc = efx_mae_match_check_caps(efx, &match.mask, extack); if (rc) goto release; rule = kzalloc(sizeof(*rule), GFP_USER); if (!rule) { rc = -ENOMEM; goto release; } INIT_LIST_HEAD(&rule->acts.list); rule->cookie = tc->cookie; old = rhashtable_lookup_get_insert_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); if (IS_ERR(old)) { rc = PTR_ERR(old); goto release; } else if (old) { netif_dbg(efx, drv, efx->net_dev, "Already offloaded rule (cookie %lx)\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Rule already offloaded"); rc = -EEXIST; goto release; } /* Parse actions */ act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } /** * DOC: TC action translation * * Actions in TC are sequential and cumulative, with delivery actions * potentially anywhere in the order. The EF100 MAE, however, takes * an 'action set list' consisting of 'action sets', each of which is * applied to the _original_ packet, and consists of a set of optional * actions in a fixed order with delivery at the end. * To translate between these two models, we maintain a 'cursor', @act, * which describes the cumulative effect of all the packet-mutating * actions encountered so far; on handling a delivery (mirred or drop) * action, once the action-set has been inserted into hardware, we * append @act to the action-set list (@rule->acts); if this is a pipe * action (mirred mirror) we then allocate a new @act with a copy of * the cursor state _before_ the delivery action, otherwise we set @act * to %NULL. * This ensures that every allocated action-set is either attached to * @rule->acts or pointed to by @act (and never both), and that only * those action-sets in @rule->acts exist in hardware. Consequently, * in the failure path, @act only needs to be freed in memory, whereas * for @rule->acts we remove each action-set from hardware before * freeing it (efx_tc_free_action_set_list()), even if the action-set * list itself is not in hardware. */ flow_action_for_each(i, fa, &fr->action) { struct efx_tc_action_set save; u16 tci; if (!act) { /* more actions after a non-pipe action */ NL_SET_ERR_MSG_MOD(extack, "Action follows non-pipe action"); rc = -EINVAL; goto release; } if ((fa->id == FLOW_ACTION_REDIRECT || fa->id == FLOW_ACTION_MIRRED || fa->id == FLOW_ACTION_DROP) && fa->hw_stats) { struct efx_tc_counter_index *ctr; /* Currently the only actions that want stats are * mirred and gact (ok, shot, trap, goto-chain), which * means we want stats just before delivery. Also, * note that tunnel_key set shouldn't change the length * — it's only the subsequent mirred that does that, * and the stats are taken _before_ the mirred action * happens. */ if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_COUNT)) { /* All supported actions that count either steal * (gact shot, mirred redirect) or clone act * (mirred mirror), so we should never get two * count actions on one action_set. */ NL_SET_ERR_MSG_MOD(extack, "Count-action conflict (can't happen)"); rc = -EOPNOTSUPP; goto release; } if (!(fa->hw_stats & FLOW_ACTION_HW_STATS_DELAYED)) { NL_SET_ERR_MSG_FMT_MOD(extack, "hw_stats_type %u not supported (only 'delayed')", fa->hw_stats); rc = -EOPNOTSUPP; goto release; } ctr = efx_tc_flower_get_counter_index(efx, tc->cookie, EFX_TC_COUNTER_TYPE_AR); if (IS_ERR(ctr)) { rc = PTR_ERR(ctr); NL_SET_ERR_MSG_MOD(extack, "Failed to obtain a counter"); goto release; } act->count = ctr; INIT_LIST_HEAD(&act->count_user); } switch (fa->id) { case FLOW_ACTION_DROP: rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (drop)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* end of the line */ break; case FLOW_ACTION_REDIRECT: case FLOW_ACTION_MIRRED: save = *act; if (encap_info) { struct efx_tc_encap_action *encap; if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_ENCAP)) { rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Encap action violates action order"); goto release; } encap = efx_tc_flower_create_encap_md( efx, encap_info, fa->dev, extack); if (IS_ERR_OR_NULL(encap)) { rc = PTR_ERR(encap); if (!rc) rc = -EIO; /* arbitrary */ goto release; } act->encap_md = encap; list_add_tail(&act->encap_user, &encap->users); act->dest_mport = encap->dest_mport; act->deliver = 1; if (act->count && !WARN_ON(!act->count->cnt)) { /* This counter is used by an encap * action, which needs a reference back * so it can prod neighbouring whenever * traffic is seen. */ spin_lock_bh(&act->count->cnt->lock); list_add_tail(&act->count_user, &act->count->cnt->users); spin_unlock_bh(&act->count->cnt->lock); } rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (encap)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act->user = &rule->acts; act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ save.count = NULL; act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DELIVER)) { /* can't happen */ rc = -EOPNOTSUPP; NL_SET_ERR_MSG_MOD(extack, "Deliver action violates action order (can't happen)"); goto release; } to_efv = efx_tc_flower_lookup_efv(efx, fa->dev); if (IS_ERR(to_efv)) { NL_SET_ERR_MSG_MOD(extack, "Mirred egress device not on switch"); rc = PTR_ERR(to_efv); goto release; } rc = efx_tc_flower_external_mport(efx, to_efv); if (rc < 0) { NL_SET_ERR_MSG_MOD(extack, "Failed to identify egress m-port"); goto release; } act->dest_mport = rc; act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (mirred)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; if (fa->id == FLOW_ACTION_REDIRECT) break; /* end of the line */ /* Mirror, so continue on with saved act */ save.count = NULL; act = kzalloc(sizeof(*act), GFP_USER); if (!act) { rc = -ENOMEM; goto release; } *act = save; break; case FLOW_ACTION_VLAN_POP: if (act->vlan_push) { act->vlan_push--; } else if (efx_tc_flower_action_order_ok(act, EFX_TC_AO_VLAN_POP)) { act->vlan_pop++; } else { NL_SET_ERR_MSG_MOD(extack, "More than two VLAN pops, or action order violated"); rc = -EINVAL; goto release; } break; case FLOW_ACTION_VLAN_PUSH: if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_VLAN_PUSH)) { rc = -EINVAL; NL_SET_ERR_MSG_MOD(extack, "More than two VLAN pushes, or action order violated"); goto release; } tci = fa->vlan.vid & VLAN_VID_MASK; tci |= fa->vlan.prio << VLAN_PRIO_SHIFT; act->vlan_tci[act->vlan_push] = cpu_to_be16(tci); act->vlan_proto[act->vlan_push] = fa->vlan.proto; act->vlan_push++; break; case FLOW_ACTION_ADD: rc = efx_tc_pedit_add(efx, act, fa, extack); if (rc < 0) goto release; break; case FLOW_ACTION_MANGLE: rc = efx_tc_mangle(efx, act, fa, &mung, extack, &match); if (rc < 0) goto release; break; case FLOW_ACTION_TUNNEL_ENCAP: if (encap_info) { /* Can't specify encap multiple times. * If you want to overwrite an existing * encap_info, use an intervening * FLOW_ACTION_TUNNEL_DECAP to clear it. */ NL_SET_ERR_MSG_MOD(extack, "Tunnel key set when already set"); rc = -EINVAL; goto release; } if (!fa->tunnel) { NL_SET_ERR_MSG_MOD(extack, "Tunnel key set is missing key"); rc = -EOPNOTSUPP; goto release; } encap_info = fa->tunnel; break; case FLOW_ACTION_TUNNEL_DECAP: if (encap_info) { encap_info = NULL; break; } /* Since we don't support enc_key matches on ingress * (and if we did there'd be no tunnel-device to give * us a type), we can't offload a decap that's not * just undoing a previous encap action. */ NL_SET_ERR_MSG_MOD(extack, "Cannot offload tunnel decap action without tunnel device"); rc = -EOPNOTSUPP; goto release; case FLOW_ACTION_CT: if (fa->ct.action != TCA_CT_ACT_NAT) { rc = -EOPNOTSUPP; NL_SET_ERR_MSG_FMT_MOD(extack, "Can only offload CT 'nat' action in RHS rules, not %d", fa->ct.action); goto release; } act->do_nat = 1; break; default: NL_SET_ERR_MSG_FMT_MOD(extack, "Unhandled action %u", fa->id); rc = -EOPNOTSUPP; goto release; } } rc = efx_tc_incomplete_mangle(&mung, extack); if (rc < 0) goto release; if (act) { /* Not shot/redirected, so deliver to default dest */ if (from_efv == EFX_EFV_PF) /* Rule applies to traffic from the wire, * and default dest is thus the PF */ efx_mae_mport_uplink(efx, &act->dest_mport); else /* Representor, so rule applies to traffic from * representee, and default dest is thus the rep. * All reps use the same mport for delivery */ efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &act->dest_mport); act->deliver = 1; rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (deliver)"); goto release; } list_add_tail(&act->list, &rule->acts.list); act = NULL; /* Prevent double-free in error path */ } netif_dbg(efx, drv, efx->net_dev, "Successfully parsed filter (cookie %lx)\n", tc->cookie); rule->match = match; rc = efx_mae_alloc_action_set_list(efx, &rule->acts); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set list to hw"); goto release; } if (from_efv == EFX_EFV_PF) /* PF netdev, so rule applies to traffic from wire */ rule->fallback = &efx->tc->facts.pf; else /* repdev, so rule applies to traffic from representee */ rule->fallback = &efx->tc->facts.reps; if (!efx_tc_check_ready(efx, rule)) { netif_dbg(efx, drv, efx->net_dev, "action not ready for hw\n"); acts_id = rule->fallback->fw_id; } else { netif_dbg(efx, drv, efx->net_dev, "ready for hw\n"); acts_id = rule->acts.fw_id; } rc = efx_mae_insert_rule(efx, &rule->match, EFX_TC_PRIO_TC, acts_id, &rule->fw_id); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to insert rule in hw"); goto release_acts; } return 0; release_acts: efx_mae_free_action_set_list(efx, &rule->acts); release: /* We failed to insert the rule, so free up any entries we created in * subsidiary tables. */ if (match.rid) efx_tc_put_recirc_id(efx, match.rid); if (act) efx_tc_free_action_set(efx, act, false); if (rule) { if (!old) rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); efx_tc_free_action_set_list(efx, &rule->acts, false); } kfree(rule); return rc; } static int efx_tc_flower_destroy(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_lhs_rule *lhs_rule; struct efx_tc_flow_rule *rule; lhs_rule = rhashtable_lookup_fast(&efx->tc->lhs_rule_ht, &tc->cookie, efx_tc_lhs_rule_ht_params); if (lhs_rule) { /* Remove it from HW */ efx_mae_remove_lhs_rule(efx, lhs_rule); /* Delete it from SW */ efx_tc_flower_release_lhs_actions(efx, &lhs_rule->lhs_act); rhashtable_remove_fast(&efx->tc->lhs_rule_ht, &lhs_rule->linkage, efx_tc_lhs_rule_ht_params); if (lhs_rule->match.encap) efx_tc_flower_release_encap_match(efx, lhs_rule->match.encap); netif_dbg(efx, drv, efx->net_dev, "Removed (lhs) filter %lx\n", lhs_rule->cookie); kfree(lhs_rule); return 0; } rule = rhashtable_lookup_fast(&efx->tc->match_action_ht, &tc->cookie, efx_tc_match_action_ht_params); if (!rule) { /* Only log a message if we're the ingress device. Otherwise * it's a foreign filter and we might just not have been * interested (e.g. we might not have been the egress device * either). */ if (!IS_ERR(efx_tc_flower_lookup_efv(efx, net_dev))) netif_warn(efx, drv, efx->net_dev, "Filter %lx not found to remove\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Flow cookie not found in offloaded rules"); return -ENOENT; } /* Remove it from HW */ efx_tc_delete_rule(efx, rule); /* Delete it from SW */ rhashtable_remove_fast(&efx->tc->match_action_ht, &rule->linkage, efx_tc_match_action_ht_params); netif_dbg(efx, drv, efx->net_dev, "Removed filter %lx\n", rule->cookie); kfree(rule); return 0; } static int efx_tc_flower_stats(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc) { struct netlink_ext_ack *extack = tc->common.extack; struct efx_tc_counter_index *ctr; struct efx_tc_counter *cnt; u64 packets, bytes; ctr = efx_tc_flower_find_counter_index(efx, tc->cookie); if (!ctr) { /* See comment in efx_tc_flower_destroy() */ if (!IS_ERR(efx_tc_flower_lookup_efv(efx, net_dev))) if (net_ratelimit()) netif_warn(efx, drv, efx->net_dev, "Filter %lx not found for stats\n", tc->cookie); NL_SET_ERR_MSG_MOD(extack, "Flow cookie not found in offloaded rules"); return -ENOENT; } if (WARN_ON(!ctr->cnt)) /* can't happen */ return -EIO; cnt = ctr->cnt; spin_lock_bh(&cnt->lock); /* Report only new pkts/bytes since last time TC asked */ packets = cnt->packets; bytes = cnt->bytes; flow_stats_update(&tc->stats, bytes - cnt->old_bytes, packets - cnt->old_packets, 0, cnt->touched, FLOW_ACTION_HW_STATS_DELAYED); cnt->old_packets = packets; cnt->old_bytes = bytes; spin_unlock_bh(&cnt->lock); return 0; } int efx_tc_flower(struct efx_nic *efx, struct net_device *net_dev, struct flow_cls_offload *tc, struct efx_rep *efv) { int rc; if (!efx->tc) return -EOPNOTSUPP; mutex_lock(&efx->tc->mutex); switch (tc->command) { case FLOW_CLS_REPLACE: rc = efx_tc_flower_replace(efx, net_dev, tc, efv); break; case FLOW_CLS_DESTROY: rc = efx_tc_flower_destroy(efx, net_dev, tc); break; case FLOW_CLS_STATS: rc = efx_tc_flower_stats(efx, net_dev, tc); break; default: rc = -EOPNOTSUPP; break; } mutex_unlock(&efx->tc->mutex); return rc; } static int efx_tc_configure_default_rule(struct efx_nic *efx, u32 ing_port, u32 eg_port, struct efx_tc_flow_rule *rule) { struct efx_tc_action_set_list *acts = &rule->acts; struct efx_tc_match *match = &rule->match; struct efx_tc_action_set *act; int rc; match->value.ingress_port = ing_port; match->mask.ingress_port = ~0; act = kzalloc(sizeof(*act), GFP_KERNEL); if (!act) return -ENOMEM; act->deliver = 1; act->dest_mport = eg_port; rc = efx_mae_alloc_action_set(efx, act); if (rc) goto fail1; EFX_WARN_ON_PARANOID(!list_empty(&acts->list)); list_add_tail(&act->list, &acts->list); rc = efx_mae_alloc_action_set_list(efx, acts); if (rc) goto fail2; rc = efx_mae_insert_rule(efx, match, EFX_TC_PRIO_DFLT, acts->fw_id, &rule->fw_id); if (rc) goto fail3; return 0; fail3: efx_mae_free_action_set_list(efx, acts); fail2: list_del(&act->list); efx_mae_free_action_set(efx, act->fw_id); fail1: kfree(act); return rc; } static int efx_tc_configure_default_rule_pf(struct efx_nic *efx) { struct efx_tc_flow_rule *rule = &efx->tc->dflt.pf; u32 ing_port, eg_port; efx_mae_mport_uplink(efx, &ing_port); efx_mae_mport_wire(efx, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } static int efx_tc_configure_default_rule_wire(struct efx_nic *efx) { struct efx_tc_flow_rule *rule = &efx->tc->dflt.wire; u32 ing_port, eg_port; efx_mae_mport_wire(efx, &ing_port); efx_mae_mport_uplink(efx, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } int efx_tc_configure_default_rule_rep(struct efx_rep *efv) { struct efx_tc_flow_rule *rule = &efv->dflt; struct efx_nic *efx = efv->parent; u32 ing_port, eg_port; efx_mae_mport_mport(efx, efv->mport, &ing_port); efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &eg_port); return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule); } void efx_tc_deconfigure_default_rule(struct efx_nic *efx, struct efx_tc_flow_rule *rule) { if (rule->fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL) efx_tc_delete_rule(efx, rule); rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; } static int efx_tc_configure_fallback_acts(struct efx_nic *efx, u32 eg_port, struct efx_tc_action_set_list *acts) { struct efx_tc_action_set *act; int rc; act = kzalloc(sizeof(*act), GFP_KERNEL); if (!act) return -ENOMEM; act->deliver = 1; act->dest_mport = eg_port; rc = efx_mae_alloc_action_set(efx, act); if (rc) goto fail1; EFX_WARN_ON_PARANOID(!list_empty(&acts->list)); list_add_tail(&act->list, &acts->list); rc = efx_mae_alloc_action_set_list(efx, acts); if (rc) goto fail2; return 0; fail2: list_del(&act->list); efx_mae_free_action_set(efx, act->fw_id); fail1: kfree(act); return rc; } static int efx_tc_configure_fallback_acts_pf(struct efx_nic *efx) { struct efx_tc_action_set_list *acts = &efx->tc->facts.pf; u32 eg_port; efx_mae_mport_uplink(efx, &eg_port); return efx_tc_configure_fallback_acts(efx, eg_port, acts); } static int efx_tc_configure_fallback_acts_reps(struct efx_nic *efx) { struct efx_tc_action_set_list *acts = &efx->tc->facts.reps; u32 eg_port; efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &eg_port); return efx_tc_configure_fallback_acts(efx, eg_port, acts); } static void efx_tc_deconfigure_fallback_acts(struct efx_nic *efx, struct efx_tc_action_set_list *acts) { efx_tc_free_action_set_list(efx, acts, true); } static int efx_tc_configure_rep_mport(struct efx_nic *efx) { u32 rep_mport_label; int rc; rc = efx_mae_allocate_mport(efx, &efx->tc->reps_mport_id, &rep_mport_label); if (rc) return rc; pci_dbg(efx->pci_dev, "created rep mport 0x%08x (0x%04x)\n", efx->tc->reps_mport_id, rep_mport_label); /* Use mport *selector* as vport ID */ efx_mae_mport_mport(efx, efx->tc->reps_mport_id, &efx->tc->reps_mport_vport_id); return 0; } static void efx_tc_deconfigure_rep_mport(struct efx_nic *efx) { efx_mae_free_mport(efx, efx->tc->reps_mport_id); efx->tc->reps_mport_id = MAE_MPORT_SELECTOR_NULL; } int efx_tc_insert_rep_filters(struct efx_nic *efx) { struct efx_filter_spec promisc, allmulti; int rc; if (efx->type->is_vf) return 0; if (!efx->tc) return 0; efx_filter_init_rx(&promisc, EFX_FILTER_PRI_REQUIRED, 0, 0); efx_filter_set_uc_def(&promisc); efx_filter_set_vport_id(&promisc, efx->tc->reps_mport_vport_id); rc = efx_filter_insert_filter(efx, &promisc, false); if (rc < 0) return rc; efx->tc->reps_filter_uc = rc; efx_filter_init_rx(&allmulti, EFX_FILTER_PRI_REQUIRED, 0, 0); efx_filter_set_mc_def(&allmulti); efx_filter_set_vport_id(&allmulti, efx->tc->reps_mport_vport_id); rc = efx_filter_insert_filter(efx, &allmulti, false); if (rc < 0) return rc; efx->tc->reps_filter_mc = rc; return 0; } void efx_tc_remove_rep_filters(struct efx_nic *efx) { if (efx->type->is_vf) return; if (!efx->tc) return; if (efx->tc->reps_filter_mc >= 0) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, efx->tc->reps_filter_mc); efx->tc->reps_filter_mc = -1; if (efx->tc->reps_filter_uc >= 0) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED, efx->tc->reps_filter_uc); efx->tc->reps_filter_uc = -1; } int efx_init_tc(struct efx_nic *efx) { int rc; rc = efx_mae_get_caps(efx, efx->tc->caps); if (rc) return rc; if (efx->tc->caps->match_field_count > MAE_NUM_FIELDS) /* Firmware supports some match fields the driver doesn't know * about. Not fatal, unless any of those fields are required * (MAE_FIELD_SUPPORTED_MATCH_ALWAYS) but if so we don't know. */ netif_warn(efx, probe, efx->net_dev, "FW reports additional match fields %u\n", efx->tc->caps->match_field_count); if (efx->tc->caps->action_prios < EFX_TC_PRIO__NUM) { netif_err(efx, probe, efx->net_dev, "Too few action prios supported (have %u, need %u)\n", efx->tc->caps->action_prios, EFX_TC_PRIO__NUM); return -EIO; } rc = efx_tc_configure_default_rule_pf(efx); if (rc) return rc; rc = efx_tc_configure_default_rule_wire(efx); if (rc) return rc; rc = efx_tc_configure_rep_mport(efx); if (rc) return rc; rc = efx_tc_configure_fallback_acts_pf(efx); if (rc) return rc; rc = efx_tc_configure_fallback_acts_reps(efx); if (rc) return rc; rc = efx_mae_get_tables(efx); if (rc) return rc; rc = flow_indr_dev_register(efx_tc_indr_setup_cb, efx); if (rc) goto out_free; efx->tc->up = true; return 0; out_free: efx_mae_free_tables(efx); return rc; } void efx_fini_tc(struct efx_nic *efx) { /* We can get called even if efx_init_struct_tc() failed */ if (!efx->tc) return; if (efx->tc->up) flow_indr_dev_unregister(efx_tc_indr_setup_cb, efx, efx_tc_block_unbind); efx_tc_deconfigure_rep_mport(efx); efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.pf); efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.wire); efx_tc_deconfigure_fallback_acts(efx, &efx->tc->facts.pf); efx_tc_deconfigure_fallback_acts(efx, &efx->tc->facts.reps); efx->tc->up = false; efx_mae_free_tables(efx); } /* At teardown time, all TC filter rules (and thus all resources they created) * should already have been removed. If we find any in our hashtables, make a * cursory attempt to clean up the software side. */ static void efx_tc_encap_match_free(void *ptr, void *__unused) { struct efx_tc_encap_match *encap = ptr; WARN_ON(refcount_read(&encap->ref)); kfree(encap); } static void efx_tc_recirc_free(void *ptr, void *arg) { struct efx_tc_recirc_id *rid = ptr; struct efx_nic *efx = arg; WARN_ON(refcount_read(&rid->ref)); ida_free(&efx->tc->recirc_ida, rid->fw_id); kfree(rid); } static void efx_tc_lhs_free(void *ptr, void *arg) { struct efx_tc_lhs_rule *rule = ptr; struct efx_nic *efx = arg; netif_err(efx, drv, efx->net_dev, "tc lhs_rule %lx still present at teardown, removing\n", rule->cookie); if (rule->lhs_act.zone) efx_tc_ct_unregister_zone(efx, rule->lhs_act.zone); if (rule->lhs_act.count) efx_tc_flower_put_counter_index(efx, rule->lhs_act.count); efx_mae_remove_lhs_rule(efx, rule); kfree(rule); } static void efx_tc_mac_free(void *ptr, void *__unused) { struct efx_tc_mac_pedit_action *ped = ptr; WARN_ON(refcount_read(&ped->ref)); kfree(ped); } static void efx_tc_flow_free(void *ptr, void *arg) { struct efx_tc_flow_rule *rule = ptr; struct efx_nic *efx = arg; netif_err(efx, drv, efx->net_dev, "tc rule %lx still present at teardown, removing\n", rule->cookie); /* Also releases entries in subsidiary tables */ efx_tc_delete_rule(efx, rule); kfree(rule); } int efx_init_struct_tc(struct efx_nic *efx) { int rc; if (efx->type->is_vf) return 0; efx->tc = kzalloc(sizeof(*efx->tc), GFP_KERNEL); if (!efx->tc) return -ENOMEM; efx->tc->caps = kzalloc(sizeof(struct mae_caps), GFP_KERNEL); if (!efx->tc->caps) { rc = -ENOMEM; goto fail_alloc_caps; } INIT_LIST_HEAD(&efx->tc->block_list); mutex_init(&efx->tc->mutex); init_waitqueue_head(&efx->tc->flush_wq); rc = efx_tc_init_encap_actions(efx); if (rc < 0) goto fail_encap_actions; rc = efx_tc_init_counters(efx); if (rc < 0) goto fail_counters; rc = rhashtable_init(&efx->tc->mac_ht, &efx_tc_mac_ht_params); if (rc < 0) goto fail_mac_ht; rc = rhashtable_init(&efx->tc->encap_match_ht, &efx_tc_encap_match_ht_params); if (rc < 0) goto fail_encap_match_ht; rc = rhashtable_init(&efx->tc->match_action_ht, &efx_tc_match_action_ht_params); if (rc < 0) goto fail_match_action_ht; rc = rhashtable_init(&efx->tc->lhs_rule_ht, &efx_tc_lhs_rule_ht_params); if (rc < 0) goto fail_lhs_rule_ht; rc = efx_tc_init_conntrack(efx); if (rc < 0) goto fail_conntrack; rc = rhashtable_init(&efx->tc->recirc_ht, &efx_tc_recirc_ht_params); if (rc < 0) goto fail_recirc_ht; ida_init(&efx->tc->recirc_ida); efx->tc->reps_filter_uc = -1; efx->tc->reps_filter_mc = -1; INIT_LIST_HEAD(&efx->tc->dflt.pf.acts.list); efx->tc->dflt.pf.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; INIT_LIST_HEAD(&efx->tc->dflt.wire.acts.list); efx->tc->dflt.wire.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL; INIT_LIST_HEAD(&efx->tc->facts.pf.list); efx->tc->facts.pf.fw_id = MC_CMD_MAE_ACTION_SET_ALLOC_OUT_ACTION_SET_ID_NULL; INIT_LIST_HEAD(&efx->tc->facts.reps.list); efx->tc->facts.reps.fw_id = MC_CMD_MAE_ACTION_SET_ALLOC_OUT_ACTION_SET_ID_NULL; efx->extra_channel_type[EFX_EXTRA_CHANNEL_TC] = &efx_tc_channel_type; return 0; fail_recirc_ht: efx_tc_destroy_conntrack(efx); fail_conntrack: rhashtable_destroy(&efx->tc->lhs_rule_ht); fail_lhs_rule_ht: rhashtable_destroy(&efx->tc->match_action_ht); fail_match_action_ht: rhashtable_destroy(&efx->tc->encap_match_ht); fail_encap_match_ht: rhashtable_destroy(&efx->tc->mac_ht); fail_mac_ht: efx_tc_destroy_counters(efx); fail_counters: efx_tc_destroy_encap_actions(efx); fail_encap_actions: mutex_destroy(&efx->tc->mutex); kfree(efx->tc->caps); fail_alloc_caps: kfree(efx->tc); efx->tc = NULL; return rc; } void efx_fini_struct_tc(struct efx_nic *efx) { if (!efx->tc) return; mutex_lock(&efx->tc->mutex); EFX_WARN_ON_PARANOID(efx->tc->dflt.pf.fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->dflt.wire.fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->facts.pf.fw_id != MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL); EFX_WARN_ON_PARANOID(efx->tc->facts.reps.fw_id != MC_CMD_MAE_ACTION_SET_LIST_ALLOC_OUT_ACTION_SET_LIST_ID_NULL); rhashtable_free_and_destroy(&efx->tc->lhs_rule_ht, efx_tc_lhs_free, efx); rhashtable_free_and_destroy(&efx->tc->match_action_ht, efx_tc_flow_free, efx); rhashtable_free_and_destroy(&efx->tc->encap_match_ht, efx_tc_encap_match_free, NULL); efx_tc_fini_conntrack(efx); rhashtable_free_and_destroy(&efx->tc->recirc_ht, efx_tc_recirc_free, efx); WARN_ON(!ida_is_empty(&efx->tc->recirc_ida)); ida_destroy(&efx->tc->recirc_ida); rhashtable_free_and_destroy(&efx->tc->mac_ht, efx_tc_mac_free, NULL); efx_tc_fini_counters(efx); efx_tc_fini_encap_actions(efx); mutex_unlock(&efx->tc->mutex); mutex_destroy(&efx->tc->mutex); kfree(efx->tc->caps); kfree(efx->tc); efx->tc = NULL; }
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