1963 lines
56 KiB
C
1963 lines
56 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
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#include <linux/skbuff.h>
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#include <net/devlink.h>
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#include <net/pkt_cls.h>
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#include "cmsg.h"
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#include "main.h"
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#include "conntrack.h"
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#include "../nfpcore/nfp_cpp.h"
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#include "../nfpcore/nfp_nsp.h"
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#include "../nfp_app.h"
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#include "../nfp_main.h"
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#include "../nfp_net.h"
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#include "../nfp_port.h"
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#define NFP_FLOWER_SUPPORTED_TCPFLAGS \
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(TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST | \
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TCPHDR_PSH | TCPHDR_URG)
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#define NFP_FLOWER_SUPPORTED_CTLFLAGS \
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(FLOW_DIS_IS_FRAGMENT | \
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FLOW_DIS_FIRST_FRAG)
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#define NFP_FLOWER_WHITELIST_DISSECTOR \
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(BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_BASIC) | \
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BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_TCP) | \
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BIT(FLOW_DISSECTOR_KEY_PORTS) | \
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BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_VLAN) | \
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BIT(FLOW_DISSECTOR_KEY_CVLAN) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IP) | \
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BIT(FLOW_DISSECTOR_KEY_MPLS) | \
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BIT(FLOW_DISSECTOR_KEY_CT) | \
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BIT(FLOW_DISSECTOR_KEY_META) | \
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BIT(FLOW_DISSECTOR_KEY_IP))
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#define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
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(BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IP))
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#define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
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(BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS))
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#define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R \
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(BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS))
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#define NFP_FLOWER_MERGE_FIELDS \
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(NFP_FLOWER_LAYER_PORT | \
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NFP_FLOWER_LAYER_MAC | \
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NFP_FLOWER_LAYER_TP | \
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NFP_FLOWER_LAYER_IPV4 | \
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NFP_FLOWER_LAYER_IPV6)
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#define NFP_FLOWER_PRE_TUN_RULE_FIELDS \
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(NFP_FLOWER_LAYER_EXT_META | \
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NFP_FLOWER_LAYER_PORT | \
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NFP_FLOWER_LAYER_MAC | \
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NFP_FLOWER_LAYER_IPV4 | \
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NFP_FLOWER_LAYER_IPV6)
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struct nfp_flower_merge_check {
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union {
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struct {
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__be16 tci;
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struct nfp_flower_mac_mpls l2;
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struct nfp_flower_tp_ports l4;
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union {
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struct nfp_flower_ipv4 ipv4;
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struct nfp_flower_ipv6 ipv6;
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};
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};
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unsigned long vals[8];
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};
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};
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int
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nfp_flower_xmit_flow(struct nfp_app *app, struct nfp_fl_payload *nfp_flow,
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u8 mtype)
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{
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u32 meta_len, key_len, mask_len, act_len, tot_len;
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struct sk_buff *skb;
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unsigned char *msg;
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meta_len = sizeof(struct nfp_fl_rule_metadata);
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key_len = nfp_flow->meta.key_len;
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mask_len = nfp_flow->meta.mask_len;
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act_len = nfp_flow->meta.act_len;
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tot_len = meta_len + key_len + mask_len + act_len;
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/* Convert to long words as firmware expects
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* lengths in units of NFP_FL_LW_SIZ.
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*/
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nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
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nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
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nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
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skb = nfp_flower_cmsg_alloc(app, tot_len, mtype, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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msg = nfp_flower_cmsg_get_data(skb);
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memcpy(msg, &nfp_flow->meta, meta_len);
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memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
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memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
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memcpy(&msg[meta_len + key_len + mask_len],
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nfp_flow->action_data, act_len);
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/* Convert back to bytes as software expects
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* lengths in units of bytes.
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*/
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nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
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nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
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nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
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nfp_ctrl_tx(app->ctrl, skb);
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return 0;
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}
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static bool nfp_flower_check_higher_than_mac(struct flow_rule *rule)
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{
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return flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
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flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
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flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS) ||
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flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP);
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}
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static bool nfp_flower_check_higher_than_l3(struct flow_rule *rule)
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{
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return flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS) ||
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flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP);
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}
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static int
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nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts,
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u32 *key_layer_two, int *key_size, bool ipv6,
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struct netlink_ext_ack *extack)
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{
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if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY ||
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(ipv6 && enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY_V6)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: geneve options exceed maximum length");
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return -EOPNOTSUPP;
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}
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if (enc_opts->len > 0) {
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*key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP;
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*key_size += sizeof(struct nfp_flower_geneve_options);
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}
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return 0;
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}
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static int
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nfp_flower_calc_udp_tun_layer(struct flow_dissector_key_ports *enc_ports,
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struct flow_dissector_key_enc_opts *enc_op,
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u32 *key_layer_two, u8 *key_layer, int *key_size,
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struct nfp_flower_priv *priv,
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enum nfp_flower_tun_type *tun_type, bool ipv6,
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struct netlink_ext_ack *extack)
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{
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int err;
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switch (enc_ports->dst) {
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case htons(IANA_VXLAN_UDP_PORT):
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*tun_type = NFP_FL_TUNNEL_VXLAN;
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*key_layer |= NFP_FLOWER_LAYER_VXLAN;
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if (ipv6) {
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*key_layer |= NFP_FLOWER_LAYER_EXT_META;
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*key_size += sizeof(struct nfp_flower_ext_meta);
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*key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
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*key_size += sizeof(struct nfp_flower_ipv6_udp_tun);
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} else {
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*key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
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}
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if (enc_op) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on vxlan tunnels");
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return -EOPNOTSUPP;
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}
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break;
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case htons(GENEVE_UDP_PORT):
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if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve offload");
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return -EOPNOTSUPP;
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}
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*tun_type = NFP_FL_TUNNEL_GENEVE;
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*key_layer |= NFP_FLOWER_LAYER_EXT_META;
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*key_size += sizeof(struct nfp_flower_ext_meta);
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*key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
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if (ipv6) {
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*key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
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*key_size += sizeof(struct nfp_flower_ipv6_udp_tun);
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} else {
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*key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
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}
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if (!enc_op)
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break;
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if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve option offload");
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return -EOPNOTSUPP;
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}
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err = nfp_flower_calc_opt_layer(enc_op, key_layer_two, key_size,
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ipv6, extack);
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if (err)
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return err;
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break;
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default:
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel type unknown");
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return -EOPNOTSUPP;
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}
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return 0;
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}
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int
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nfp_flower_calculate_key_layers(struct nfp_app *app,
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struct net_device *netdev,
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struct nfp_fl_key_ls *ret_key_ls,
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struct flow_rule *rule,
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enum nfp_flower_tun_type *tun_type,
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struct netlink_ext_ack *extack)
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{
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struct flow_dissector *dissector = rule->match.dissector;
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struct flow_match_basic basic = { NULL, NULL};
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struct nfp_flower_priv *priv = app->priv;
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u32 key_layer_two;
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u8 key_layer;
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int key_size;
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int err;
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if (dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match not supported");
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return -EOPNOTSUPP;
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}
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/* If any tun dissector is used then the required set must be used. */
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if (dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
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(dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R)
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!= NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R &&
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(dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
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!= NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel match not supported");
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return -EOPNOTSUPP;
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}
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key_layer_two = 0;
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key_layer = NFP_FLOWER_LAYER_PORT;
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key_size = sizeof(struct nfp_flower_meta_tci) +
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sizeof(struct nfp_flower_in_port);
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||
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flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_MPLS)) {
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key_layer |= NFP_FLOWER_LAYER_MAC;
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key_size += sizeof(struct nfp_flower_mac_mpls);
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}
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
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struct flow_match_vlan vlan;
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flow_rule_match_vlan(rule, &vlan);
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if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_PCP) &&
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vlan.key->vlan_priority) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support VLAN PCP offload");
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return -EOPNOTSUPP;
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}
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if (priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ &&
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!(key_layer_two & NFP_FLOWER_LAYER2_QINQ)) {
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key_layer |= NFP_FLOWER_LAYER_EXT_META;
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key_size += sizeof(struct nfp_flower_ext_meta);
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key_size += sizeof(struct nfp_flower_vlan);
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key_layer_two |= NFP_FLOWER_LAYER2_QINQ;
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}
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}
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) {
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struct flow_match_vlan cvlan;
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if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support VLAN QinQ offload");
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return -EOPNOTSUPP;
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}
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flow_rule_match_vlan(rule, &cvlan);
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if (!(key_layer_two & NFP_FLOWER_LAYER2_QINQ)) {
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key_layer |= NFP_FLOWER_LAYER_EXT_META;
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key_size += sizeof(struct nfp_flower_ext_meta);
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key_size += sizeof(struct nfp_flower_vlan);
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key_layer_two |= NFP_FLOWER_LAYER2_QINQ;
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}
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}
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
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struct flow_match_enc_opts enc_op = { NULL, NULL };
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struct flow_match_ipv4_addrs ipv4_addrs;
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struct flow_match_ipv6_addrs ipv6_addrs;
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struct flow_match_control enc_ctl;
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struct flow_match_ports enc_ports;
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bool ipv6_tun = false;
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flow_rule_match_enc_control(rule, &enc_ctl);
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if (enc_ctl.mask->addr_type != 0xffff) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: wildcarded protocols on tunnels are not supported");
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return -EOPNOTSUPP;
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}
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ipv6_tun = enc_ctl.key->addr_type ==
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FLOW_DISSECTOR_KEY_IPV6_ADDRS;
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if (ipv6_tun &&
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!(priv->flower_ext_feats & NFP_FL_FEATS_IPV6_TUN)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: firmware does not support IPv6 tunnels");
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return -EOPNOTSUPP;
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}
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if (!ipv6_tun &&
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enc_ctl.key->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel address type not IPv4 or IPv6");
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return -EOPNOTSUPP;
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}
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if (ipv6_tun) {
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flow_rule_match_enc_ipv6_addrs(rule, &ipv6_addrs);
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if (memchr_inv(&ipv6_addrs.mask->dst, 0xff,
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sizeof(ipv6_addrs.mask->dst))) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match IPv6 destination address is supported");
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return -EOPNOTSUPP;
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}
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} else {
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flow_rule_match_enc_ipv4_addrs(rule, &ipv4_addrs);
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if (ipv4_addrs.mask->dst != cpu_to_be32(~0)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match IPv4 destination address is supported");
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return -EOPNOTSUPP;
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}
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}
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS))
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flow_rule_match_enc_opts(rule, &enc_op);
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if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
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/* Check if GRE, which has no enc_ports */
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if (!netif_is_gretap(netdev) && !netif_is_ip6gretap(netdev)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: an exact match on L4 destination port is required for non-GRE tunnels");
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return -EOPNOTSUPP;
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}
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*tun_type = NFP_FL_TUNNEL_GRE;
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key_layer |= NFP_FLOWER_LAYER_EXT_META;
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key_size += sizeof(struct nfp_flower_ext_meta);
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key_layer_two |= NFP_FLOWER_LAYER2_GRE;
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if (ipv6_tun) {
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key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
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key_size +=
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sizeof(struct nfp_flower_ipv6_gre_tun);
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} else {
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key_size +=
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sizeof(struct nfp_flower_ipv4_gre_tun);
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}
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if (enc_op.key) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on GRE tunnels");
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return -EOPNOTSUPP;
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}
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} else {
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flow_rule_match_enc_ports(rule, &enc_ports);
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if (enc_ports.mask->dst != cpu_to_be16(~0)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match L4 destination port is supported");
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return -EOPNOTSUPP;
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}
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err = nfp_flower_calc_udp_tun_layer(enc_ports.key,
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enc_op.key,
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&key_layer_two,
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&key_layer,
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&key_size, priv,
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tun_type, ipv6_tun,
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extack);
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if (err)
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return err;
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/* Ensure the ingress netdev matches the expected
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* tun type.
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*/
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if (!nfp_fl_netdev_is_tunnel_type(netdev, *tun_type)) {
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NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ingress netdev does not match the expected tunnel type");
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return -EOPNOTSUPP;
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}
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}
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}
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if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC))
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flow_rule_match_basic(rule, &basic);
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if (basic.mask && basic.mask->n_proto) {
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/* Ethernet type is present in the key. */
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switch (basic.key->n_proto) {
|
||
case cpu_to_be16(ETH_P_IP):
|
||
key_layer |= NFP_FLOWER_LAYER_IPV4;
|
||
key_size += sizeof(struct nfp_flower_ipv4);
|
||
break;
|
||
|
||
case cpu_to_be16(ETH_P_IPV6):
|
||
key_layer |= NFP_FLOWER_LAYER_IPV6;
|
||
key_size += sizeof(struct nfp_flower_ipv6);
|
||
break;
|
||
|
||
/* Currently we do not offload ARP
|
||
* because we rely on it to get to the host.
|
||
*/
|
||
case cpu_to_be16(ETH_P_ARP):
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ARP not supported");
|
||
return -EOPNOTSUPP;
|
||
|
||
case cpu_to_be16(ETH_P_MPLS_UC):
|
||
case cpu_to_be16(ETH_P_MPLS_MC):
|
||
if (!(key_layer & NFP_FLOWER_LAYER_MAC)) {
|
||
key_layer |= NFP_FLOWER_LAYER_MAC;
|
||
key_size += sizeof(struct nfp_flower_mac_mpls);
|
||
}
|
||
break;
|
||
|
||
/* Will be included in layer 2. */
|
||
case cpu_to_be16(ETH_P_8021Q):
|
||
break;
|
||
|
||
default:
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on given EtherType is not supported");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
} else if (nfp_flower_check_higher_than_mac(rule)) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot match above L2 without specified EtherType");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (basic.mask && basic.mask->ip_proto) {
|
||
switch (basic.key->ip_proto) {
|
||
case IPPROTO_TCP:
|
||
case IPPROTO_UDP:
|
||
case IPPROTO_SCTP:
|
||
case IPPROTO_ICMP:
|
||
case IPPROTO_ICMPV6:
|
||
key_layer |= NFP_FLOWER_LAYER_TP;
|
||
key_size += sizeof(struct nfp_flower_tp_ports);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!(key_layer & NFP_FLOWER_LAYER_TP) &&
|
||
nfp_flower_check_higher_than_l3(rule)) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot match on L4 information without specified IP protocol type");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP)) {
|
||
struct flow_match_tcp tcp;
|
||
u32 tcp_flags;
|
||
|
||
flow_rule_match_tcp(rule, &tcp);
|
||
tcp_flags = be16_to_cpu(tcp.key->flags);
|
||
|
||
if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: no match support for selected TCP flags");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
/* We only support PSH and URG flags when either
|
||
* FIN, SYN or RST is present as well.
|
||
*/
|
||
if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) &&
|
||
!(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST))) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: PSH and URG is only supported when used with FIN, SYN or RST");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
/* We need to store TCP flags in the either the IPv4 or IPv6 key
|
||
* space, thus we need to ensure we include a IPv4/IPv6 key
|
||
* layer if we have not done so already.
|
||
*/
|
||
if (!basic.key) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on TCP flags requires a match on L3 protocol");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (!(key_layer & NFP_FLOWER_LAYER_IPV4) &&
|
||
!(key_layer & NFP_FLOWER_LAYER_IPV6)) {
|
||
switch (basic.key->n_proto) {
|
||
case cpu_to_be16(ETH_P_IP):
|
||
key_layer |= NFP_FLOWER_LAYER_IPV4;
|
||
key_size += sizeof(struct nfp_flower_ipv4);
|
||
break;
|
||
|
||
case cpu_to_be16(ETH_P_IPV6):
|
||
key_layer |= NFP_FLOWER_LAYER_IPV6;
|
||
key_size += sizeof(struct nfp_flower_ipv6);
|
||
break;
|
||
|
||
default:
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on TCP flags requires a match on IPv4/IPv6");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
|
||
struct flow_match_control ctl;
|
||
|
||
flow_rule_match_control(rule, &ctl);
|
||
if (ctl.key->flags & ~NFP_FLOWER_SUPPORTED_CTLFLAGS) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on unknown control flag");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
ret_key_ls->key_layer = key_layer;
|
||
ret_key_ls->key_layer_two = key_layer_two;
|
||
ret_key_ls->key_size = key_size;
|
||
|
||
return 0;
|
||
}
|
||
|
||
struct nfp_fl_payload *
|
||
nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
|
||
{
|
||
struct nfp_fl_payload *flow_pay;
|
||
|
||
flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
|
||
if (!flow_pay)
|
||
return NULL;
|
||
|
||
flow_pay->meta.key_len = key_layer->key_size;
|
||
flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
|
||
if (!flow_pay->unmasked_data)
|
||
goto err_free_flow;
|
||
|
||
flow_pay->meta.mask_len = key_layer->key_size;
|
||
flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
|
||
if (!flow_pay->mask_data)
|
||
goto err_free_unmasked;
|
||
|
||
flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
|
||
if (!flow_pay->action_data)
|
||
goto err_free_mask;
|
||
|
||
flow_pay->nfp_tun_ipv4_addr = 0;
|
||
flow_pay->nfp_tun_ipv6 = NULL;
|
||
flow_pay->meta.flags = 0;
|
||
INIT_LIST_HEAD(&flow_pay->linked_flows);
|
||
flow_pay->in_hw = false;
|
||
flow_pay->pre_tun_rule.dev = NULL;
|
||
|
||
return flow_pay;
|
||
|
||
err_free_mask:
|
||
kfree(flow_pay->mask_data);
|
||
err_free_unmasked:
|
||
kfree(flow_pay->unmasked_data);
|
||
err_free_flow:
|
||
kfree(flow_pay);
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
nfp_flower_update_merge_with_actions(struct nfp_fl_payload *flow,
|
||
struct nfp_flower_merge_check *merge,
|
||
u8 *last_act_id, int *act_out)
|
||
{
|
||
struct nfp_fl_set_ipv6_tc_hl_fl *ipv6_tc_hl_fl;
|
||
struct nfp_fl_set_ip4_ttl_tos *ipv4_ttl_tos;
|
||
struct nfp_fl_set_ip4_addrs *ipv4_add;
|
||
struct nfp_fl_set_ipv6_addr *ipv6_add;
|
||
struct nfp_fl_push_vlan *push_vlan;
|
||
struct nfp_fl_pre_tunnel *pre_tun;
|
||
struct nfp_fl_set_tport *tport;
|
||
struct nfp_fl_set_eth *eth;
|
||
struct nfp_fl_act_head *a;
|
||
unsigned int act_off = 0;
|
||
bool ipv6_tun = false;
|
||
u8 act_id = 0;
|
||
u8 *ports;
|
||
int i;
|
||
|
||
while (act_off < flow->meta.act_len) {
|
||
a = (struct nfp_fl_act_head *)&flow->action_data[act_off];
|
||
act_id = a->jump_id;
|
||
|
||
switch (act_id) {
|
||
case NFP_FL_ACTION_OPCODE_OUTPUT:
|
||
if (act_out)
|
||
(*act_out)++;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_PUSH_VLAN:
|
||
push_vlan = (struct nfp_fl_push_vlan *)a;
|
||
if (push_vlan->vlan_tci)
|
||
merge->tci = cpu_to_be16(0xffff);
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_POP_VLAN:
|
||
merge->tci = cpu_to_be16(0);
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_TUNNEL:
|
||
/* New tunnel header means l2 to l4 can be matched. */
|
||
eth_broadcast_addr(&merge->l2.mac_dst[0]);
|
||
eth_broadcast_addr(&merge->l2.mac_src[0]);
|
||
memset(&merge->l4, 0xff,
|
||
sizeof(struct nfp_flower_tp_ports));
|
||
if (ipv6_tun)
|
||
memset(&merge->ipv6, 0xff,
|
||
sizeof(struct nfp_flower_ipv6));
|
||
else
|
||
memset(&merge->ipv4, 0xff,
|
||
sizeof(struct nfp_flower_ipv4));
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_ETHERNET:
|
||
eth = (struct nfp_fl_set_eth *)a;
|
||
for (i = 0; i < ETH_ALEN; i++)
|
||
merge->l2.mac_dst[i] |= eth->eth_addr_mask[i];
|
||
for (i = 0; i < ETH_ALEN; i++)
|
||
merge->l2.mac_src[i] |=
|
||
eth->eth_addr_mask[ETH_ALEN + i];
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS:
|
||
ipv4_add = (struct nfp_fl_set_ip4_addrs *)a;
|
||
merge->ipv4.ipv4_src |= ipv4_add->ipv4_src_mask;
|
||
merge->ipv4.ipv4_dst |= ipv4_add->ipv4_dst_mask;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS:
|
||
ipv4_ttl_tos = (struct nfp_fl_set_ip4_ttl_tos *)a;
|
||
merge->ipv4.ip_ext.ttl |= ipv4_ttl_tos->ipv4_ttl_mask;
|
||
merge->ipv4.ip_ext.tos |= ipv4_ttl_tos->ipv4_tos_mask;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_IPV6_SRC:
|
||
ipv6_add = (struct nfp_fl_set_ipv6_addr *)a;
|
||
for (i = 0; i < 4; i++)
|
||
merge->ipv6.ipv6_src.in6_u.u6_addr32[i] |=
|
||
ipv6_add->ipv6[i].mask;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_IPV6_DST:
|
||
ipv6_add = (struct nfp_fl_set_ipv6_addr *)a;
|
||
for (i = 0; i < 4; i++)
|
||
merge->ipv6.ipv6_dst.in6_u.u6_addr32[i] |=
|
||
ipv6_add->ipv6[i].mask;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_IPV6_TC_HL_FL:
|
||
ipv6_tc_hl_fl = (struct nfp_fl_set_ipv6_tc_hl_fl *)a;
|
||
merge->ipv6.ip_ext.ttl |=
|
||
ipv6_tc_hl_fl->ipv6_hop_limit_mask;
|
||
merge->ipv6.ip_ext.tos |= ipv6_tc_hl_fl->ipv6_tc_mask;
|
||
merge->ipv6.ipv6_flow_label_exthdr |=
|
||
ipv6_tc_hl_fl->ipv6_label_mask;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_SET_UDP:
|
||
case NFP_FL_ACTION_OPCODE_SET_TCP:
|
||
tport = (struct nfp_fl_set_tport *)a;
|
||
ports = (u8 *)&merge->l4.port_src;
|
||
for (i = 0; i < 4; i++)
|
||
ports[i] |= tport->tp_port_mask[i];
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_PRE_TUNNEL:
|
||
pre_tun = (struct nfp_fl_pre_tunnel *)a;
|
||
ipv6_tun = be16_to_cpu(pre_tun->flags) &
|
||
NFP_FL_PRE_TUN_IPV6;
|
||
break;
|
||
case NFP_FL_ACTION_OPCODE_PRE_LAG:
|
||
case NFP_FL_ACTION_OPCODE_PUSH_GENEVE:
|
||
break;
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
act_off += a->len_lw << NFP_FL_LW_SIZ;
|
||
}
|
||
|
||
if (last_act_id)
|
||
*last_act_id = act_id;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
nfp_flower_populate_merge_match(struct nfp_fl_payload *flow,
|
||
struct nfp_flower_merge_check *merge,
|
||
bool extra_fields)
|
||
{
|
||
struct nfp_flower_meta_tci *meta_tci;
|
||
u8 *mask = flow->mask_data;
|
||
u8 key_layer, match_size;
|
||
|
||
memset(merge, 0, sizeof(struct nfp_flower_merge_check));
|
||
|
||
meta_tci = (struct nfp_flower_meta_tci *)mask;
|
||
key_layer = meta_tci->nfp_flow_key_layer;
|
||
|
||
if (key_layer & ~NFP_FLOWER_MERGE_FIELDS && !extra_fields)
|
||
return -EOPNOTSUPP;
|
||
|
||
merge->tci = meta_tci->tci;
|
||
mask += sizeof(struct nfp_flower_meta_tci);
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_EXT_META)
|
||
mask += sizeof(struct nfp_flower_ext_meta);
|
||
|
||
mask += sizeof(struct nfp_flower_in_port);
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_MAC) {
|
||
match_size = sizeof(struct nfp_flower_mac_mpls);
|
||
memcpy(&merge->l2, mask, match_size);
|
||
mask += match_size;
|
||
}
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_TP) {
|
||
match_size = sizeof(struct nfp_flower_tp_ports);
|
||
memcpy(&merge->l4, mask, match_size);
|
||
mask += match_size;
|
||
}
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_IPV4) {
|
||
match_size = sizeof(struct nfp_flower_ipv4);
|
||
memcpy(&merge->ipv4, mask, match_size);
|
||
}
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_IPV6) {
|
||
match_size = sizeof(struct nfp_flower_ipv6);
|
||
memcpy(&merge->ipv6, mask, match_size);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
nfp_flower_can_merge(struct nfp_fl_payload *sub_flow1,
|
||
struct nfp_fl_payload *sub_flow2)
|
||
{
|
||
/* Two flows can be merged if sub_flow2 only matches on bits that are
|
||
* either matched by sub_flow1 or set by a sub_flow1 action. This
|
||
* ensures that every packet that hits sub_flow1 and recirculates is
|
||
* guaranteed to hit sub_flow2.
|
||
*/
|
||
struct nfp_flower_merge_check sub_flow1_merge, sub_flow2_merge;
|
||
int err, act_out = 0;
|
||
u8 last_act_id = 0;
|
||
|
||
err = nfp_flower_populate_merge_match(sub_flow1, &sub_flow1_merge,
|
||
true);
|
||
if (err)
|
||
return err;
|
||
|
||
err = nfp_flower_populate_merge_match(sub_flow2, &sub_flow2_merge,
|
||
false);
|
||
if (err)
|
||
return err;
|
||
|
||
err = nfp_flower_update_merge_with_actions(sub_flow1, &sub_flow1_merge,
|
||
&last_act_id, &act_out);
|
||
if (err)
|
||
return err;
|
||
|
||
/* Must only be 1 output action and it must be the last in sequence. */
|
||
if (act_out != 1 || last_act_id != NFP_FL_ACTION_OPCODE_OUTPUT)
|
||
return -EOPNOTSUPP;
|
||
|
||
/* Reject merge if sub_flow2 matches on something that is not matched
|
||
* on or set in an action by sub_flow1.
|
||
*/
|
||
err = bitmap_andnot(sub_flow2_merge.vals, sub_flow2_merge.vals,
|
||
sub_flow1_merge.vals,
|
||
sizeof(struct nfp_flower_merge_check) * 8);
|
||
if (err)
|
||
return -EINVAL;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static unsigned int
|
||
nfp_flower_copy_pre_actions(char *act_dst, char *act_src, int len,
|
||
bool *tunnel_act)
|
||
{
|
||
unsigned int act_off = 0, act_len;
|
||
struct nfp_fl_act_head *a;
|
||
u8 act_id = 0;
|
||
|
||
while (act_off < len) {
|
||
a = (struct nfp_fl_act_head *)&act_src[act_off];
|
||
act_len = a->len_lw << NFP_FL_LW_SIZ;
|
||
act_id = a->jump_id;
|
||
|
||
switch (act_id) {
|
||
case NFP_FL_ACTION_OPCODE_PRE_TUNNEL:
|
||
if (tunnel_act)
|
||
*tunnel_act = true;
|
||
fallthrough;
|
||
case NFP_FL_ACTION_OPCODE_PRE_LAG:
|
||
memcpy(act_dst + act_off, act_src + act_off, act_len);
|
||
break;
|
||
default:
|
||
return act_off;
|
||
}
|
||
|
||
act_off += act_len;
|
||
}
|
||
|
||
return act_off;
|
||
}
|
||
|
||
static int
|
||
nfp_fl_verify_post_tun_acts(char *acts, int len, struct nfp_fl_push_vlan **vlan)
|
||
{
|
||
struct nfp_fl_act_head *a;
|
||
unsigned int act_off = 0;
|
||
|
||
while (act_off < len) {
|
||
a = (struct nfp_fl_act_head *)&acts[act_off];
|
||
|
||
if (a->jump_id == NFP_FL_ACTION_OPCODE_PUSH_VLAN && !act_off)
|
||
*vlan = (struct nfp_fl_push_vlan *)a;
|
||
else if (a->jump_id != NFP_FL_ACTION_OPCODE_OUTPUT)
|
||
return -EOPNOTSUPP;
|
||
|
||
act_off += a->len_lw << NFP_FL_LW_SIZ;
|
||
}
|
||
|
||
/* Ensure any VLAN push also has an egress action. */
|
||
if (*vlan && act_off <= sizeof(struct nfp_fl_push_vlan))
|
||
return -EOPNOTSUPP;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
nfp_fl_push_vlan_after_tun(char *acts, int len, struct nfp_fl_push_vlan *vlan)
|
||
{
|
||
struct nfp_fl_set_tun *tun;
|
||
struct nfp_fl_act_head *a;
|
||
unsigned int act_off = 0;
|
||
|
||
while (act_off < len) {
|
||
a = (struct nfp_fl_act_head *)&acts[act_off];
|
||
|
||
if (a->jump_id == NFP_FL_ACTION_OPCODE_SET_TUNNEL) {
|
||
tun = (struct nfp_fl_set_tun *)a;
|
||
tun->outer_vlan_tpid = vlan->vlan_tpid;
|
||
tun->outer_vlan_tci = vlan->vlan_tci;
|
||
|
||
return 0;
|
||
}
|
||
|
||
act_off += a->len_lw << NFP_FL_LW_SIZ;
|
||
}
|
||
|
||
/* Return error if no tunnel action is found. */
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
static int
|
||
nfp_flower_merge_action(struct nfp_fl_payload *sub_flow1,
|
||
struct nfp_fl_payload *sub_flow2,
|
||
struct nfp_fl_payload *merge_flow)
|
||
{
|
||
unsigned int sub1_act_len, sub2_act_len, pre_off1, pre_off2;
|
||
struct nfp_fl_push_vlan *post_tun_push_vlan = NULL;
|
||
bool tunnel_act = false;
|
||
char *merge_act;
|
||
int err;
|
||
|
||
/* The last action of sub_flow1 must be output - do not merge this. */
|
||
sub1_act_len = sub_flow1->meta.act_len - sizeof(struct nfp_fl_output);
|
||
sub2_act_len = sub_flow2->meta.act_len;
|
||
|
||
if (!sub2_act_len)
|
||
return -EINVAL;
|
||
|
||
if (sub1_act_len + sub2_act_len > NFP_FL_MAX_A_SIZ)
|
||
return -EINVAL;
|
||
|
||
/* A shortcut can only be applied if there is a single action. */
|
||
if (sub1_act_len)
|
||
merge_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
|
||
else
|
||
merge_flow->meta.shortcut = sub_flow2->meta.shortcut;
|
||
|
||
merge_flow->meta.act_len = sub1_act_len + sub2_act_len;
|
||
merge_act = merge_flow->action_data;
|
||
|
||
/* Copy any pre-actions to the start of merge flow action list. */
|
||
pre_off1 = nfp_flower_copy_pre_actions(merge_act,
|
||
sub_flow1->action_data,
|
||
sub1_act_len, &tunnel_act);
|
||
merge_act += pre_off1;
|
||
sub1_act_len -= pre_off1;
|
||
pre_off2 = nfp_flower_copy_pre_actions(merge_act,
|
||
sub_flow2->action_data,
|
||
sub2_act_len, NULL);
|
||
merge_act += pre_off2;
|
||
sub2_act_len -= pre_off2;
|
||
|
||
/* FW does a tunnel push when egressing, therefore, if sub_flow 1 pushes
|
||
* a tunnel, there are restrictions on what sub_flow 2 actions lead to a
|
||
* valid merge.
|
||
*/
|
||
if (tunnel_act) {
|
||
char *post_tun_acts = &sub_flow2->action_data[pre_off2];
|
||
|
||
err = nfp_fl_verify_post_tun_acts(post_tun_acts, sub2_act_len,
|
||
&post_tun_push_vlan);
|
||
if (err)
|
||
return err;
|
||
|
||
if (post_tun_push_vlan) {
|
||
pre_off2 += sizeof(*post_tun_push_vlan);
|
||
sub2_act_len -= sizeof(*post_tun_push_vlan);
|
||
}
|
||
}
|
||
|
||
/* Copy remaining actions from sub_flows 1 and 2. */
|
||
memcpy(merge_act, sub_flow1->action_data + pre_off1, sub1_act_len);
|
||
|
||
if (post_tun_push_vlan) {
|
||
/* Update tunnel action in merge to include VLAN push. */
|
||
err = nfp_fl_push_vlan_after_tun(merge_act, sub1_act_len,
|
||
post_tun_push_vlan);
|
||
if (err)
|
||
return err;
|
||
|
||
merge_flow->meta.act_len -= sizeof(*post_tun_push_vlan);
|
||
}
|
||
|
||
merge_act += sub1_act_len;
|
||
memcpy(merge_act, sub_flow2->action_data + pre_off2, sub2_act_len);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Flow link code should only be accessed under RTNL. */
|
||
static void nfp_flower_unlink_flow(struct nfp_fl_payload_link *link)
|
||
{
|
||
list_del(&link->merge_flow.list);
|
||
list_del(&link->sub_flow.list);
|
||
kfree(link);
|
||
}
|
||
|
||
static void nfp_flower_unlink_flows(struct nfp_fl_payload *merge_flow,
|
||
struct nfp_fl_payload *sub_flow)
|
||
{
|
||
struct nfp_fl_payload_link *link;
|
||
|
||
list_for_each_entry(link, &merge_flow->linked_flows, merge_flow.list)
|
||
if (link->sub_flow.flow == sub_flow) {
|
||
nfp_flower_unlink_flow(link);
|
||
return;
|
||
}
|
||
}
|
||
|
||
static int nfp_flower_link_flows(struct nfp_fl_payload *merge_flow,
|
||
struct nfp_fl_payload *sub_flow)
|
||
{
|
||
struct nfp_fl_payload_link *link;
|
||
|
||
link = kmalloc(sizeof(*link), GFP_KERNEL);
|
||
if (!link)
|
||
return -ENOMEM;
|
||
|
||
link->merge_flow.flow = merge_flow;
|
||
list_add_tail(&link->merge_flow.list, &merge_flow->linked_flows);
|
||
link->sub_flow.flow = sub_flow;
|
||
list_add_tail(&link->sub_flow.list, &sub_flow->linked_flows);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* nfp_flower_merge_offloaded_flows() - Merge 2 existing flows to single flow.
|
||
* @app: Pointer to the APP handle
|
||
* @sub_flow1: Initial flow matched to produce merge hint
|
||
* @sub_flow2: Post recirculation flow matched in merge hint
|
||
*
|
||
* Combines 2 flows (if valid) to a single flow, removing the initial from hw
|
||
* and offloading the new, merged flow.
|
||
*
|
||
* Return: negative value on error, 0 in success.
|
||
*/
|
||
int nfp_flower_merge_offloaded_flows(struct nfp_app *app,
|
||
struct nfp_fl_payload *sub_flow1,
|
||
struct nfp_fl_payload *sub_flow2)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_fl_payload *merge_flow;
|
||
struct nfp_fl_key_ls merge_key_ls;
|
||
struct nfp_merge_info *merge_info;
|
||
u64 parent_ctx = 0;
|
||
int err;
|
||
|
||
ASSERT_RTNL();
|
||
|
||
if (sub_flow1 == sub_flow2 ||
|
||
nfp_flower_is_merge_flow(sub_flow1) ||
|
||
nfp_flower_is_merge_flow(sub_flow2))
|
||
return -EINVAL;
|
||
|
||
/* Check if the two flows are already merged */
|
||
parent_ctx = (u64)(be32_to_cpu(sub_flow1->meta.host_ctx_id)) << 32;
|
||
parent_ctx |= (u64)(be32_to_cpu(sub_flow2->meta.host_ctx_id));
|
||
if (rhashtable_lookup_fast(&priv->merge_table,
|
||
&parent_ctx, merge_table_params)) {
|
||
nfp_flower_cmsg_warn(app, "The two flows are already merged.\n");
|
||
return 0;
|
||
}
|
||
|
||
err = nfp_flower_can_merge(sub_flow1, sub_flow2);
|
||
if (err)
|
||
return err;
|
||
|
||
merge_key_ls.key_size = sub_flow1->meta.key_len;
|
||
|
||
merge_flow = nfp_flower_allocate_new(&merge_key_ls);
|
||
if (!merge_flow)
|
||
return -ENOMEM;
|
||
|
||
merge_flow->tc_flower_cookie = (unsigned long)merge_flow;
|
||
merge_flow->ingress_dev = sub_flow1->ingress_dev;
|
||
|
||
memcpy(merge_flow->unmasked_data, sub_flow1->unmasked_data,
|
||
sub_flow1->meta.key_len);
|
||
memcpy(merge_flow->mask_data, sub_flow1->mask_data,
|
||
sub_flow1->meta.mask_len);
|
||
|
||
err = nfp_flower_merge_action(sub_flow1, sub_flow2, merge_flow);
|
||
if (err)
|
||
goto err_destroy_merge_flow;
|
||
|
||
err = nfp_flower_link_flows(merge_flow, sub_flow1);
|
||
if (err)
|
||
goto err_destroy_merge_flow;
|
||
|
||
err = nfp_flower_link_flows(merge_flow, sub_flow2);
|
||
if (err)
|
||
goto err_unlink_sub_flow1;
|
||
|
||
err = nfp_compile_flow_metadata(app, merge_flow->tc_flower_cookie, merge_flow,
|
||
merge_flow->ingress_dev, NULL);
|
||
if (err)
|
||
goto err_unlink_sub_flow2;
|
||
|
||
err = rhashtable_insert_fast(&priv->flow_table, &merge_flow->fl_node,
|
||
nfp_flower_table_params);
|
||
if (err)
|
||
goto err_release_metadata;
|
||
|
||
merge_info = kmalloc(sizeof(*merge_info), GFP_KERNEL);
|
||
if (!merge_info) {
|
||
err = -ENOMEM;
|
||
goto err_remove_rhash;
|
||
}
|
||
merge_info->parent_ctx = parent_ctx;
|
||
err = rhashtable_insert_fast(&priv->merge_table, &merge_info->ht_node,
|
||
merge_table_params);
|
||
if (err)
|
||
goto err_destroy_merge_info;
|
||
|
||
err = nfp_flower_xmit_flow(app, merge_flow,
|
||
NFP_FLOWER_CMSG_TYPE_FLOW_MOD);
|
||
if (err)
|
||
goto err_remove_merge_info;
|
||
|
||
merge_flow->in_hw = true;
|
||
sub_flow1->in_hw = false;
|
||
|
||
return 0;
|
||
|
||
err_remove_merge_info:
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->merge_table,
|
||
&merge_info->ht_node,
|
||
merge_table_params));
|
||
err_destroy_merge_info:
|
||
kfree(merge_info);
|
||
err_remove_rhash:
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
|
||
&merge_flow->fl_node,
|
||
nfp_flower_table_params));
|
||
err_release_metadata:
|
||
nfp_modify_flow_metadata(app, merge_flow);
|
||
err_unlink_sub_flow2:
|
||
nfp_flower_unlink_flows(merge_flow, sub_flow2);
|
||
err_unlink_sub_flow1:
|
||
nfp_flower_unlink_flows(merge_flow, sub_flow1);
|
||
err_destroy_merge_flow:
|
||
kfree(merge_flow->action_data);
|
||
kfree(merge_flow->mask_data);
|
||
kfree(merge_flow->unmasked_data);
|
||
kfree(merge_flow);
|
||
return err;
|
||
}
|
||
|
||
/**
|
||
* nfp_flower_validate_pre_tun_rule()
|
||
* @app: Pointer to the APP handle
|
||
* @flow: Pointer to NFP flow representation of rule
|
||
* @key_ls: Pointer to NFP key layers structure
|
||
* @extack: Netlink extended ACK report
|
||
*
|
||
* Verifies the flow as a pre-tunnel rule.
|
||
*
|
||
* Return: negative value on error, 0 if verified.
|
||
*/
|
||
static int
|
||
nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
|
||
struct nfp_fl_payload *flow,
|
||
struct nfp_fl_key_ls *key_ls,
|
||
struct netlink_ext_ack *extack)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_flower_meta_tci *meta_tci;
|
||
struct nfp_flower_mac_mpls *mac;
|
||
u8 *ext = flow->unmasked_data;
|
||
struct nfp_fl_act_head *act;
|
||
u8 *mask = flow->mask_data;
|
||
bool vlan = false;
|
||
int act_offset;
|
||
u8 key_layer;
|
||
|
||
meta_tci = (struct nfp_flower_meta_tci *)flow->unmasked_data;
|
||
key_layer = key_ls->key_layer;
|
||
if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
|
||
if (meta_tci->tci & cpu_to_be16(NFP_FLOWER_MASK_VLAN_PRESENT)) {
|
||
u16 vlan_tci = be16_to_cpu(meta_tci->tci);
|
||
|
||
vlan_tci &= ~NFP_FLOWER_MASK_VLAN_PRESENT;
|
||
flow->pre_tun_rule.vlan_tci = cpu_to_be16(vlan_tci);
|
||
vlan = true;
|
||
} else {
|
||
flow->pre_tun_rule.vlan_tci = cpu_to_be16(0xffff);
|
||
}
|
||
}
|
||
|
||
if (key_layer & ~NFP_FLOWER_PRE_TUN_RULE_FIELDS) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: too many match fields");
|
||
return -EOPNOTSUPP;
|
||
} else if (key_ls->key_layer_two & ~NFP_FLOWER_LAYER2_QINQ) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: non-vlan in extended match fields");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (!(key_layer & NFP_FLOWER_LAYER_MAC)) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: MAC fields match required");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (!(key_layer & NFP_FLOWER_LAYER_IPV4) &&
|
||
!(key_layer & NFP_FLOWER_LAYER_IPV6)) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: match on ipv4/ipv6 eth_type must be present");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
if (key_layer & NFP_FLOWER_LAYER_IPV6)
|
||
flow->pre_tun_rule.is_ipv6 = true;
|
||
else
|
||
flow->pre_tun_rule.is_ipv6 = false;
|
||
|
||
/* Skip fields known to exist. */
|
||
mask += sizeof(struct nfp_flower_meta_tci);
|
||
ext += sizeof(struct nfp_flower_meta_tci);
|
||
if (key_ls->key_layer_two) {
|
||
mask += sizeof(struct nfp_flower_ext_meta);
|
||
ext += sizeof(struct nfp_flower_ext_meta);
|
||
}
|
||
mask += sizeof(struct nfp_flower_in_port);
|
||
ext += sizeof(struct nfp_flower_in_port);
|
||
|
||
/* Ensure destination MAC address is fully matched. */
|
||
mac = (struct nfp_flower_mac_mpls *)mask;
|
||
if (!is_broadcast_ether_addr(&mac->mac_dst[0])) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: dest MAC field must not be masked");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
/* Ensure source MAC address is fully matched. This is only needed
|
||
* for firmware with the DECAP_V2 feature enabled. Don't do this
|
||
* for firmware without this feature to keep old behaviour.
|
||
*/
|
||
if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
|
||
mac = (struct nfp_flower_mac_mpls *)mask;
|
||
if (!is_broadcast_ether_addr(&mac->mac_src[0])) {
|
||
NL_SET_ERR_MSG_MOD(extack,
|
||
"unsupported pre-tunnel rule: source MAC field must not be masked");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
if (mac->mpls_lse) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: MPLS not supported");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
/* Ensure destination MAC address matches pre_tun_dev. */
|
||
mac = (struct nfp_flower_mac_mpls *)ext;
|
||
if (memcmp(&mac->mac_dst[0], flow->pre_tun_rule.dev->dev_addr, 6)) {
|
||
NL_SET_ERR_MSG_MOD(extack,
|
||
"unsupported pre-tunnel rule: dest MAC must match output dev MAC");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
/* Save mac addresses in pre_tun_rule entry for later use */
|
||
memcpy(&flow->pre_tun_rule.loc_mac, &mac->mac_dst[0], ETH_ALEN);
|
||
memcpy(&flow->pre_tun_rule.rem_mac, &mac->mac_src[0], ETH_ALEN);
|
||
|
||
mask += sizeof(struct nfp_flower_mac_mpls);
|
||
ext += sizeof(struct nfp_flower_mac_mpls);
|
||
if (key_layer & NFP_FLOWER_LAYER_IPV4 ||
|
||
key_layer & NFP_FLOWER_LAYER_IPV6) {
|
||
/* Flags and proto fields have same offset in IPv4 and IPv6. */
|
||
int ip_flags = offsetof(struct nfp_flower_ipv4, ip_ext.flags);
|
||
int ip_proto = offsetof(struct nfp_flower_ipv4, ip_ext.proto);
|
||
int size;
|
||
int i;
|
||
|
||
size = key_layer & NFP_FLOWER_LAYER_IPV4 ?
|
||
sizeof(struct nfp_flower_ipv4) :
|
||
sizeof(struct nfp_flower_ipv6);
|
||
|
||
|
||
/* Ensure proto and flags are the only IP layer fields. */
|
||
for (i = 0; i < size; i++)
|
||
if (mask[i] && i != ip_flags && i != ip_proto) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: only flags and proto can be matched in ip header");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
ext += size;
|
||
mask += size;
|
||
}
|
||
|
||
if ((priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
|
||
if (key_ls->key_layer_two & NFP_FLOWER_LAYER2_QINQ) {
|
||
struct nfp_flower_vlan *vlan_tags;
|
||
u16 vlan_tpid;
|
||
u16 vlan_tci;
|
||
|
||
vlan_tags = (struct nfp_flower_vlan *)ext;
|
||
|
||
vlan_tci = be16_to_cpu(vlan_tags->outer_tci);
|
||
vlan_tpid = be16_to_cpu(vlan_tags->outer_tpid);
|
||
|
||
vlan_tci &= ~NFP_FLOWER_MASK_VLAN_PRESENT;
|
||
flow->pre_tun_rule.vlan_tci = cpu_to_be16(vlan_tci);
|
||
flow->pre_tun_rule.vlan_tpid = cpu_to_be16(vlan_tpid);
|
||
vlan = true;
|
||
} else {
|
||
flow->pre_tun_rule.vlan_tci = cpu_to_be16(0xffff);
|
||
flow->pre_tun_rule.vlan_tpid = cpu_to_be16(0xffff);
|
||
}
|
||
}
|
||
|
||
/* Action must be a single egress or pop_vlan and egress. */
|
||
act_offset = 0;
|
||
act = (struct nfp_fl_act_head *)&flow->action_data[act_offset];
|
||
if (vlan) {
|
||
if (act->jump_id != NFP_FL_ACTION_OPCODE_POP_VLAN) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: match on VLAN must have VLAN pop as first action");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
act_offset += act->len_lw << NFP_FL_LW_SIZ;
|
||
act = (struct nfp_fl_act_head *)&flow->action_data[act_offset];
|
||
}
|
||
|
||
if (act->jump_id != NFP_FL_ACTION_OPCODE_OUTPUT) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: non egress action detected where egress was expected");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
act_offset += act->len_lw << NFP_FL_LW_SIZ;
|
||
|
||
/* Ensure there are no more actions after egress. */
|
||
if (act_offset != flow->meta.act_len) {
|
||
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: egress is not the last action");
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static bool offload_pre_check(struct flow_cls_offload *flow)
|
||
{
|
||
struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
|
||
struct flow_dissector *dissector = rule->match.dissector;
|
||
struct flow_match_ct ct;
|
||
|
||
if (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CT)) {
|
||
flow_rule_match_ct(rule, &ct);
|
||
/* Allow special case where CT match is all 0 */
|
||
if (memchr_inv(ct.key, 0, sizeof(*ct.key)))
|
||
return false;
|
||
}
|
||
|
||
if (flow->common.chain_index)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* nfp_flower_add_offload() - Adds a new flow to hardware.
|
||
* @app: Pointer to the APP handle
|
||
* @netdev: netdev structure.
|
||
* @flow: TC flower classifier offload structure.
|
||
*
|
||
* Adds a new flow to the repeated hash structure and action payload.
|
||
*
|
||
* Return: negative value on error, 0 if configured successfully.
|
||
*/
|
||
static int
|
||
nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
|
||
struct flow_cls_offload *flow)
|
||
{
|
||
struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
|
||
enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct netlink_ext_ack *extack = NULL;
|
||
struct nfp_fl_payload *flow_pay;
|
||
struct nfp_fl_key_ls *key_layer;
|
||
struct nfp_port *port = NULL;
|
||
int err;
|
||
|
||
extack = flow->common.extack;
|
||
if (nfp_netdev_is_nfp_repr(netdev))
|
||
port = nfp_port_from_netdev(netdev);
|
||
|
||
if (is_pre_ct_flow(flow))
|
||
return nfp_fl_ct_handle_pre_ct(priv, netdev, flow, extack);
|
||
|
||
if (is_post_ct_flow(flow))
|
||
return nfp_fl_ct_handle_post_ct(priv, netdev, flow, extack);
|
||
|
||
if (!offload_pre_check(flow))
|
||
return -EOPNOTSUPP;
|
||
|
||
key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
|
||
if (!key_layer)
|
||
return -ENOMEM;
|
||
|
||
err = nfp_flower_calculate_key_layers(app, netdev, key_layer, rule,
|
||
&tun_type, extack);
|
||
if (err)
|
||
goto err_free_key_ls;
|
||
|
||
flow_pay = nfp_flower_allocate_new(key_layer);
|
||
if (!flow_pay) {
|
||
err = -ENOMEM;
|
||
goto err_free_key_ls;
|
||
}
|
||
|
||
err = nfp_flower_compile_flow_match(app, rule, key_layer, netdev,
|
||
flow_pay, tun_type, extack);
|
||
if (err)
|
||
goto err_destroy_flow;
|
||
|
||
err = nfp_flower_compile_action(app, rule, netdev, flow_pay, extack);
|
||
if (err)
|
||
goto err_destroy_flow;
|
||
|
||
if (flow_pay->pre_tun_rule.dev) {
|
||
err = nfp_flower_validate_pre_tun_rule(app, flow_pay, key_layer, extack);
|
||
if (err)
|
||
goto err_destroy_flow;
|
||
}
|
||
|
||
err = nfp_compile_flow_metadata(app, flow->cookie, flow_pay, netdev, extack);
|
||
if (err)
|
||
goto err_destroy_flow;
|
||
|
||
flow_pay->tc_flower_cookie = flow->cookie;
|
||
err = rhashtable_insert_fast(&priv->flow_table, &flow_pay->fl_node,
|
||
nfp_flower_table_params);
|
||
if (err) {
|
||
NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot insert flow into tables for offloads");
|
||
goto err_release_metadata;
|
||
}
|
||
|
||
if (flow_pay->pre_tun_rule.dev) {
|
||
if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
|
||
struct nfp_predt_entry *predt;
|
||
|
||
predt = kzalloc(sizeof(*predt), GFP_KERNEL);
|
||
if (!predt) {
|
||
err = -ENOMEM;
|
||
goto err_remove_rhash;
|
||
}
|
||
predt->flow_pay = flow_pay;
|
||
INIT_LIST_HEAD(&predt->nn_list);
|
||
spin_lock_bh(&priv->predt_lock);
|
||
list_add(&predt->list_head, &priv->predt_list);
|
||
flow_pay->pre_tun_rule.predt = predt;
|
||
nfp_tun_link_and_update_nn_entries(app, predt);
|
||
spin_unlock_bh(&priv->predt_lock);
|
||
} else {
|
||
err = nfp_flower_xmit_pre_tun_flow(app, flow_pay);
|
||
}
|
||
} else {
|
||
err = nfp_flower_xmit_flow(app, flow_pay,
|
||
NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
|
||
}
|
||
|
||
if (err)
|
||
goto err_remove_rhash;
|
||
|
||
if (port)
|
||
port->tc_offload_cnt++;
|
||
|
||
flow_pay->in_hw = true;
|
||
|
||
/* Deallocate flow payload when flower rule has been destroyed. */
|
||
kfree(key_layer);
|
||
|
||
return 0;
|
||
|
||
err_remove_rhash:
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
|
||
&flow_pay->fl_node,
|
||
nfp_flower_table_params));
|
||
err_release_metadata:
|
||
nfp_modify_flow_metadata(app, flow_pay);
|
||
err_destroy_flow:
|
||
if (flow_pay->nfp_tun_ipv6)
|
||
nfp_tunnel_put_ipv6_off(app, flow_pay->nfp_tun_ipv6);
|
||
kfree(flow_pay->action_data);
|
||
kfree(flow_pay->mask_data);
|
||
kfree(flow_pay->unmasked_data);
|
||
kfree(flow_pay);
|
||
err_free_key_ls:
|
||
kfree(key_layer);
|
||
return err;
|
||
}
|
||
|
||
static void
|
||
nfp_flower_remove_merge_flow(struct nfp_app *app,
|
||
struct nfp_fl_payload *del_sub_flow,
|
||
struct nfp_fl_payload *merge_flow)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_fl_payload_link *link, *temp;
|
||
struct nfp_merge_info *merge_info;
|
||
struct nfp_fl_payload *origin;
|
||
u64 parent_ctx = 0;
|
||
bool mod = false;
|
||
int err;
|
||
|
||
link = list_first_entry(&merge_flow->linked_flows,
|
||
struct nfp_fl_payload_link, merge_flow.list);
|
||
origin = link->sub_flow.flow;
|
||
|
||
/* Re-add rule the merge had overwritten if it has not been deleted. */
|
||
if (origin != del_sub_flow)
|
||
mod = true;
|
||
|
||
err = nfp_modify_flow_metadata(app, merge_flow);
|
||
if (err) {
|
||
nfp_flower_cmsg_warn(app, "Metadata fail for merge flow delete.\n");
|
||
goto err_free_links;
|
||
}
|
||
|
||
if (!mod) {
|
||
err = nfp_flower_xmit_flow(app, merge_flow,
|
||
NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
|
||
if (err) {
|
||
nfp_flower_cmsg_warn(app, "Failed to delete merged flow.\n");
|
||
goto err_free_links;
|
||
}
|
||
} else {
|
||
__nfp_modify_flow_metadata(priv, origin);
|
||
err = nfp_flower_xmit_flow(app, origin,
|
||
NFP_FLOWER_CMSG_TYPE_FLOW_MOD);
|
||
if (err)
|
||
nfp_flower_cmsg_warn(app, "Failed to revert merge flow.\n");
|
||
origin->in_hw = true;
|
||
}
|
||
|
||
err_free_links:
|
||
/* Clean any links connected with the merged flow. */
|
||
list_for_each_entry_safe(link, temp, &merge_flow->linked_flows,
|
||
merge_flow.list) {
|
||
u32 ctx_id = be32_to_cpu(link->sub_flow.flow->meta.host_ctx_id);
|
||
|
||
parent_ctx = (parent_ctx << 32) | (u64)(ctx_id);
|
||
nfp_flower_unlink_flow(link);
|
||
}
|
||
|
||
merge_info = rhashtable_lookup_fast(&priv->merge_table,
|
||
&parent_ctx,
|
||
merge_table_params);
|
||
if (merge_info) {
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->merge_table,
|
||
&merge_info->ht_node,
|
||
merge_table_params));
|
||
kfree(merge_info);
|
||
}
|
||
|
||
kfree(merge_flow->action_data);
|
||
kfree(merge_flow->mask_data);
|
||
kfree(merge_flow->unmasked_data);
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
|
||
&merge_flow->fl_node,
|
||
nfp_flower_table_params));
|
||
kfree_rcu(merge_flow, rcu);
|
||
}
|
||
|
||
void
|
||
nfp_flower_del_linked_merge_flows(struct nfp_app *app,
|
||
struct nfp_fl_payload *sub_flow)
|
||
{
|
||
struct nfp_fl_payload_link *link, *temp;
|
||
|
||
/* Remove any merge flow formed from the deleted sub_flow. */
|
||
list_for_each_entry_safe(link, temp, &sub_flow->linked_flows,
|
||
sub_flow.list)
|
||
nfp_flower_remove_merge_flow(app, sub_flow,
|
||
link->merge_flow.flow);
|
||
}
|
||
|
||
/**
|
||
* nfp_flower_del_offload() - Removes a flow from hardware.
|
||
* @app: Pointer to the APP handle
|
||
* @netdev: netdev structure.
|
||
* @flow: TC flower classifier offload structure
|
||
*
|
||
* Removes a flow from the repeated hash structure and clears the
|
||
* action payload. Any flows merged from this are also deleted.
|
||
*
|
||
* Return: negative value on error, 0 if removed successfully.
|
||
*/
|
||
static int
|
||
nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
|
||
struct flow_cls_offload *flow)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_fl_ct_map_entry *ct_map_ent;
|
||
struct netlink_ext_ack *extack = NULL;
|
||
struct nfp_fl_payload *nfp_flow;
|
||
struct nfp_port *port = NULL;
|
||
int err;
|
||
|
||
extack = flow->common.extack;
|
||
if (nfp_netdev_is_nfp_repr(netdev))
|
||
port = nfp_port_from_netdev(netdev);
|
||
|
||
/* Check ct_map_table */
|
||
ct_map_ent = rhashtable_lookup_fast(&priv->ct_map_table, &flow->cookie,
|
||
nfp_ct_map_params);
|
||
if (ct_map_ent) {
|
||
err = nfp_fl_ct_del_flow(ct_map_ent);
|
||
return err;
|
||
}
|
||
|
||
nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev);
|
||
if (!nfp_flow) {
|
||
NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot remove flow that does not exist");
|
||
return -ENOENT;
|
||
}
|
||
|
||
err = nfp_modify_flow_metadata(app, nfp_flow);
|
||
if (err)
|
||
goto err_free_merge_flow;
|
||
|
||
if (nfp_flow->nfp_tun_ipv4_addr)
|
||
nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
|
||
|
||
if (nfp_flow->nfp_tun_ipv6)
|
||
nfp_tunnel_put_ipv6_off(app, nfp_flow->nfp_tun_ipv6);
|
||
|
||
if (!nfp_flow->in_hw) {
|
||
err = 0;
|
||
goto err_free_merge_flow;
|
||
}
|
||
|
||
if (nfp_flow->pre_tun_rule.dev) {
|
||
if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
|
||
struct nfp_predt_entry *predt;
|
||
|
||
predt = nfp_flow->pre_tun_rule.predt;
|
||
if (predt) {
|
||
spin_lock_bh(&priv->predt_lock);
|
||
nfp_tun_unlink_and_update_nn_entries(app, predt);
|
||
list_del(&predt->list_head);
|
||
spin_unlock_bh(&priv->predt_lock);
|
||
kfree(predt);
|
||
}
|
||
} else {
|
||
err = nfp_flower_xmit_pre_tun_del_flow(app, nfp_flow);
|
||
}
|
||
} else {
|
||
err = nfp_flower_xmit_flow(app, nfp_flow,
|
||
NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
|
||
}
|
||
/* Fall through on error. */
|
||
|
||
err_free_merge_flow:
|
||
nfp_flower_del_linked_merge_flows(app, nfp_flow);
|
||
if (port)
|
||
port->tc_offload_cnt--;
|
||
kfree(nfp_flow->action_data);
|
||
kfree(nfp_flow->mask_data);
|
||
kfree(nfp_flow->unmasked_data);
|
||
WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
|
||
&nfp_flow->fl_node,
|
||
nfp_flower_table_params));
|
||
kfree_rcu(nfp_flow, rcu);
|
||
return err;
|
||
}
|
||
|
||
static void
|
||
__nfp_flower_update_merge_stats(struct nfp_app *app,
|
||
struct nfp_fl_payload *merge_flow)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_fl_payload_link *link;
|
||
struct nfp_fl_payload *sub_flow;
|
||
u64 pkts, bytes, used;
|
||
u32 ctx_id;
|
||
|
||
ctx_id = be32_to_cpu(merge_flow->meta.host_ctx_id);
|
||
pkts = priv->stats[ctx_id].pkts;
|
||
/* Do not cycle subflows if no stats to distribute. */
|
||
if (!pkts)
|
||
return;
|
||
bytes = priv->stats[ctx_id].bytes;
|
||
used = priv->stats[ctx_id].used;
|
||
|
||
/* Reset stats for the merge flow. */
|
||
priv->stats[ctx_id].pkts = 0;
|
||
priv->stats[ctx_id].bytes = 0;
|
||
|
||
/* The merge flow has received stats updates from firmware.
|
||
* Distribute these stats to all subflows that form the merge.
|
||
* The stats will collected from TC via the subflows.
|
||
*/
|
||
list_for_each_entry(link, &merge_flow->linked_flows, merge_flow.list) {
|
||
sub_flow = link->sub_flow.flow;
|
||
ctx_id = be32_to_cpu(sub_flow->meta.host_ctx_id);
|
||
priv->stats[ctx_id].pkts += pkts;
|
||
priv->stats[ctx_id].bytes += bytes;
|
||
priv->stats[ctx_id].used = max_t(u64, used,
|
||
priv->stats[ctx_id].used);
|
||
}
|
||
}
|
||
|
||
void
|
||
nfp_flower_update_merge_stats(struct nfp_app *app,
|
||
struct nfp_fl_payload *sub_flow)
|
||
{
|
||
struct nfp_fl_payload_link *link;
|
||
|
||
/* Get merge flows that the subflow forms to distribute their stats. */
|
||
list_for_each_entry(link, &sub_flow->linked_flows, sub_flow.list)
|
||
__nfp_flower_update_merge_stats(app, link->merge_flow.flow);
|
||
}
|
||
|
||
/**
|
||
* nfp_flower_get_stats() - Populates flow stats obtained from hardware.
|
||
* @app: Pointer to the APP handle
|
||
* @netdev: Netdev structure.
|
||
* @flow: TC flower classifier offload structure
|
||
*
|
||
* Populates a flow statistics structure which which corresponds to a
|
||
* specific flow.
|
||
*
|
||
* Return: negative value on error, 0 if stats populated successfully.
|
||
*/
|
||
static int
|
||
nfp_flower_get_stats(struct nfp_app *app, struct net_device *netdev,
|
||
struct flow_cls_offload *flow)
|
||
{
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct nfp_fl_ct_map_entry *ct_map_ent;
|
||
struct netlink_ext_ack *extack = NULL;
|
||
struct nfp_fl_payload *nfp_flow;
|
||
u32 ctx_id;
|
||
|
||
/* Check ct_map table first */
|
||
ct_map_ent = rhashtable_lookup_fast(&priv->ct_map_table, &flow->cookie,
|
||
nfp_ct_map_params);
|
||
if (ct_map_ent)
|
||
return nfp_fl_ct_stats(flow, ct_map_ent);
|
||
|
||
extack = flow->common.extack;
|
||
nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev);
|
||
if (!nfp_flow) {
|
||
NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot dump stats for flow that does not exist");
|
||
return -EINVAL;
|
||
}
|
||
|
||
ctx_id = be32_to_cpu(nfp_flow->meta.host_ctx_id);
|
||
|
||
spin_lock_bh(&priv->stats_lock);
|
||
/* If request is for a sub_flow, update stats from merged flows. */
|
||
if (!list_empty(&nfp_flow->linked_flows))
|
||
nfp_flower_update_merge_stats(app, nfp_flow);
|
||
|
||
flow_stats_update(&flow->stats, priv->stats[ctx_id].bytes,
|
||
priv->stats[ctx_id].pkts, 0, priv->stats[ctx_id].used,
|
||
FLOW_ACTION_HW_STATS_DELAYED);
|
||
|
||
priv->stats[ctx_id].pkts = 0;
|
||
priv->stats[ctx_id].bytes = 0;
|
||
spin_unlock_bh(&priv->stats_lock);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
|
||
struct flow_cls_offload *flower)
|
||
{
|
||
if (!eth_proto_is_802_3(flower->common.protocol))
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (flower->command) {
|
||
case FLOW_CLS_REPLACE:
|
||
return nfp_flower_add_offload(app, netdev, flower);
|
||
case FLOW_CLS_DESTROY:
|
||
return nfp_flower_del_offload(app, netdev, flower);
|
||
case FLOW_CLS_STATS:
|
||
return nfp_flower_get_stats(app, netdev, flower);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
|
||
void *type_data, void *cb_priv)
|
||
{
|
||
struct flow_cls_common_offload *common = type_data;
|
||
struct nfp_repr *repr = cb_priv;
|
||
|
||
if (!tc_can_offload_extack(repr->netdev, common->extack))
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (type) {
|
||
case TC_SETUP_CLSFLOWER:
|
||
return nfp_flower_repr_offload(repr->app, repr->netdev,
|
||
type_data);
|
||
case TC_SETUP_CLSMATCHALL:
|
||
return nfp_flower_setup_qos_offload(repr->app, repr->netdev,
|
||
type_data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
static LIST_HEAD(nfp_block_cb_list);
|
||
|
||
static int nfp_flower_setup_tc_block(struct net_device *netdev,
|
||
struct flow_block_offload *f)
|
||
{
|
||
struct nfp_repr *repr = netdev_priv(netdev);
|
||
struct nfp_flower_repr_priv *repr_priv;
|
||
struct flow_block_cb *block_cb;
|
||
|
||
if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
|
||
return -EOPNOTSUPP;
|
||
|
||
repr_priv = repr->app_priv;
|
||
repr_priv->block_shared = f->block_shared;
|
||
f->driver_block_list = &nfp_block_cb_list;
|
||
|
||
switch (f->command) {
|
||
case FLOW_BLOCK_BIND:
|
||
if (flow_block_cb_is_busy(nfp_flower_setup_tc_block_cb, repr,
|
||
&nfp_block_cb_list))
|
||
return -EBUSY;
|
||
|
||
block_cb = flow_block_cb_alloc(nfp_flower_setup_tc_block_cb,
|
||
repr, repr, NULL);
|
||
if (IS_ERR(block_cb))
|
||
return PTR_ERR(block_cb);
|
||
|
||
flow_block_cb_add(block_cb, f);
|
||
list_add_tail(&block_cb->driver_list, &nfp_block_cb_list);
|
||
return 0;
|
||
case FLOW_BLOCK_UNBIND:
|
||
block_cb = flow_block_cb_lookup(f->block,
|
||
nfp_flower_setup_tc_block_cb,
|
||
repr);
|
||
if (!block_cb)
|
||
return -ENOENT;
|
||
|
||
flow_block_cb_remove(block_cb, f);
|
||
list_del(&block_cb->driver_list);
|
||
return 0;
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
|
||
enum tc_setup_type type, void *type_data)
|
||
{
|
||
switch (type) {
|
||
case TC_SETUP_BLOCK:
|
||
return nfp_flower_setup_tc_block(netdev, type_data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
struct nfp_flower_indr_block_cb_priv {
|
||
struct net_device *netdev;
|
||
struct nfp_app *app;
|
||
struct list_head list;
|
||
};
|
||
|
||
static struct nfp_flower_indr_block_cb_priv *
|
||
nfp_flower_indr_block_cb_priv_lookup(struct nfp_app *app,
|
||
struct net_device *netdev)
|
||
{
|
||
struct nfp_flower_indr_block_cb_priv *cb_priv;
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
|
||
list_for_each_entry(cb_priv, &priv->indr_block_cb_priv, list)
|
||
if (cb_priv->netdev == netdev)
|
||
return cb_priv;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static int nfp_flower_setup_indr_block_cb(enum tc_setup_type type,
|
||
void *type_data, void *cb_priv)
|
||
{
|
||
struct nfp_flower_indr_block_cb_priv *priv = cb_priv;
|
||
|
||
switch (type) {
|
||
case TC_SETUP_CLSFLOWER:
|
||
return nfp_flower_repr_offload(priv->app, priv->netdev,
|
||
type_data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
void nfp_flower_setup_indr_tc_release(void *cb_priv)
|
||
{
|
||
struct nfp_flower_indr_block_cb_priv *priv = cb_priv;
|
||
|
||
list_del(&priv->list);
|
||
kfree(priv);
|
||
}
|
||
|
||
static int
|
||
nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct Qdisc *sch, struct nfp_app *app,
|
||
struct flow_block_offload *f, void *data,
|
||
void (*cleanup)(struct flow_block_cb *block_cb))
|
||
{
|
||
struct nfp_flower_indr_block_cb_priv *cb_priv;
|
||
struct nfp_flower_priv *priv = app->priv;
|
||
struct flow_block_cb *block_cb;
|
||
|
||
if ((f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS &&
|
||
!nfp_flower_internal_port_can_offload(app, netdev)) ||
|
||
(f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS &&
|
||
nfp_flower_internal_port_can_offload(app, netdev)))
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (f->command) {
|
||
case FLOW_BLOCK_BIND:
|
||
cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev);
|
||
if (cb_priv &&
|
||
flow_block_cb_is_busy(nfp_flower_setup_indr_block_cb,
|
||
cb_priv,
|
||
&nfp_block_cb_list))
|
||
return -EBUSY;
|
||
|
||
cb_priv = kmalloc(sizeof(*cb_priv), GFP_KERNEL);
|
||
if (!cb_priv)
|
||
return -ENOMEM;
|
||
|
||
cb_priv->netdev = netdev;
|
||
cb_priv->app = app;
|
||
list_add(&cb_priv->list, &priv->indr_block_cb_priv);
|
||
|
||
block_cb = flow_indr_block_cb_alloc(nfp_flower_setup_indr_block_cb,
|
||
cb_priv, cb_priv,
|
||
nfp_flower_setup_indr_tc_release,
|
||
f, netdev, sch, data, app, cleanup);
|
||
if (IS_ERR(block_cb)) {
|
||
list_del(&cb_priv->list);
|
||
kfree(cb_priv);
|
||
return PTR_ERR(block_cb);
|
||
}
|
||
|
||
flow_block_cb_add(block_cb, f);
|
||
list_add_tail(&block_cb->driver_list, &nfp_block_cb_list);
|
||
return 0;
|
||
case FLOW_BLOCK_UNBIND:
|
||
cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev);
|
||
if (!cb_priv)
|
||
return -ENOENT;
|
||
|
||
block_cb = flow_block_cb_lookup(f->block,
|
||
nfp_flower_setup_indr_block_cb,
|
||
cb_priv);
|
||
if (!block_cb)
|
||
return -ENOENT;
|
||
|
||
flow_indr_block_cb_remove(block_cb, f);
|
||
list_del(&block_cb->driver_list);
|
||
return 0;
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
nfp_setup_tc_no_dev(struct nfp_app *app, enum tc_setup_type type, void *data)
|
||
{
|
||
if (!data)
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (type) {
|
||
case TC_SETUP_ACT:
|
||
return nfp_setup_tc_act_offload(app, data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
int
|
||
nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
|
||
enum tc_setup_type type, void *type_data,
|
||
void *data,
|
||
void (*cleanup)(struct flow_block_cb *block_cb))
|
||
{
|
||
if (!netdev)
|
||
return nfp_setup_tc_no_dev(cb_priv, type, data);
|
||
|
||
if (!nfp_fl_is_netdev_to_offload(netdev))
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (type) {
|
||
case TC_SETUP_BLOCK:
|
||
return nfp_flower_setup_indr_tc_block(netdev, sch, cb_priv,
|
||
type_data, data, cleanup);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|