1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ 2/* Copyright (C) 2021 Corigine, Inc. */ 3 4#ifndef __NFP_FLOWER_CONNTRACK_H__ 5#define __NFP_FLOWER_CONNTRACK_H__ 1 6 7#include <net/netfilter/nf_flow_table.h> 8#include "main.h" 9 10#define NFP_FL_CT_NO_TUN 0xff 11 12#define COMPARE_UNMASKED_FIELDS(__match1, __match2, __out) \ 13 do { \ 14 typeof(__match1) _match1 = (__match1); \ 15 typeof(__match2) _match2 = (__match2); \ 16 bool *_out = (__out); \ 17 int i, size = sizeof(*(_match1).key); \ 18 char *k1, *m1, *k2, *m2; \ 19 *_out = false; \ 20 k1 = (char *)_match1.key; \ 21 m1 = (char *)_match1.mask; \ 22 k2 = (char *)_match2.key; \ 23 m2 = (char *)_match2.mask; \ 24 for (i = 0; i < size; i++) \ 25 if ((k1[i] & m1[i] & m2[i]) ^ \ 26 (k2[i] & m1[i] & m2[i])) { \ 27 *_out = true; \ 28 break; \ 29 } \ 30 } while (0) \ 31 32extern const struct rhashtable_params nfp_zone_table_params; 33extern const struct rhashtable_params nfp_ct_map_params; 34extern const struct rhashtable_params nfp_tc_ct_merge_params; 35extern const struct rhashtable_params nfp_nft_ct_merge_params; 36 37/** 38 * struct nfp_fl_ct_zone_entry - Zone entry containing conntrack flow information 39 * @zone: The zone number, used as lookup key in hashtable 40 * @hash_node: Used by the hashtable 41 * @priv: Pointer to nfp_flower_priv data 42 * @nft: Pointer to nf_flowtable for this zone 43 * 44 * @pre_ct_list: The pre_ct_list of nfp_fl_ct_flow_entry entries 45 * @pre_ct_count: Keep count of the number of pre_ct entries 46 * 47 * @post_ct_list: The post_ct_list of nfp_fl_ct_flow_entry entries 48 * @post_ct_count: Keep count of the number of post_ct entries 49 * 50 * @tc_merge_tb: The table of merged tc flows 51 * @tc_merge_count: Keep count of the number of merged tc entries 52 * 53 * @nft_flows_list: The list of nft relatednfp_fl_ct_flow_entry entries 54 * @nft_flows_count: Keep count of the number of nft_flow entries 55 * 56 * @nft_merge_tb: The table of merged tc+nft flows 57 * @nft_merge_count: Keep count of the number of merged tc+nft entries 58 */ 59struct nfp_fl_ct_zone_entry { 60 u16 zone; 61 struct rhash_head hash_node; 62 63 struct nfp_flower_priv *priv; 64 struct nf_flowtable *nft; 65 66 struct list_head pre_ct_list; 67 unsigned int pre_ct_count; 68 69 struct list_head post_ct_list; 70 unsigned int post_ct_count; 71 72 struct rhashtable tc_merge_tb; 73 unsigned int tc_merge_count; 74 75 struct list_head nft_flows_list; 76 unsigned int nft_flows_count; 77 78 struct rhashtable nft_merge_tb; 79 unsigned int nft_merge_count; 80}; 81 82enum ct_entry_type { 83 CT_TYPE_PRE_CT, 84 CT_TYPE_NFT, 85 CT_TYPE_POST_CT, 86}; 87 88/** 89 * struct nfp_fl_ct_flow_entry - Flow entry containing conntrack flow information 90 * @cookie: Flow cookie, same as original TC flow, used as key 91 * @list_node: Used by the list 92 * @chain_index: Chain index of the original flow 93 * @netdev: netdev structure. 94 * @type: Type of pre-entry from enum ct_entry_type 95 * @zt: Reference to the zone table this belongs to 96 * @children: List of tc_merge flows this flow forms part of 97 * @rule: Reference to the original TC flow rule 98 * @stats: Used to cache stats for updating 99 * @tun_offset: Used to indicate tunnel action offset in action list 100 */ 101struct nfp_fl_ct_flow_entry { 102 unsigned long cookie; 103 struct list_head list_node; 104 u32 chain_index; 105 enum ct_entry_type type; 106 struct net_device *netdev; 107 struct nfp_fl_ct_zone_entry *zt; 108 struct list_head children; 109 struct flow_rule *rule; 110 struct flow_stats stats; 111 u8 tun_offset; // Set to NFP_FL_CT_NO_TUN if no tun 112}; 113 114/** 115 * struct nfp_fl_ct_tc_merge - Merge of two flows from tc 116 * @cookie: Flow cookie, combination of pre and post ct cookies 117 * @hash_node: Used by the hashtable 118 * @pre_ct_list: This entry is part of a pre_ct_list 119 * @post_ct_list: This entry is part of a post_ct_list 120 * @zt: Reference to the zone table this belongs to 121 * @pre_ct_parent: The pre_ct_parent 122 * @post_ct_parent: The post_ct_parent 123 * @children: List of nft merged entries 124 */ 125struct nfp_fl_ct_tc_merge { 126 unsigned long cookie[2]; 127 struct rhash_head hash_node; 128 struct list_head pre_ct_list; 129 struct list_head post_ct_list; 130 struct nfp_fl_ct_zone_entry *zt; 131 struct nfp_fl_ct_flow_entry *pre_ct_parent; 132 struct nfp_fl_ct_flow_entry *post_ct_parent; 133 struct list_head children; 134}; 135 136/** 137 * struct nfp_fl_nft_tc_merge - Merge of tc_merge flows with nft flow 138 * @netdev: Ingress netdev name 139 * @cookie: Flow cookie, combination of tc_merge and nft cookies 140 * @hash_node: Used by the hashtable 141 * @zt: Reference to the zone table this belongs to 142 * @nft_flow_list: This entry is part of a nft_flows_list 143 * @tc_merge_list: This entry is part of a ct_merge_list 144 * @tc_m_parent: The tc_merge parent 145 * @nft_parent: The nft_entry parent 146 * @tc_flower_cookie: The cookie of the flow offloaded to the nfp 147 * @flow_pay: Reference to the offloaded flow struct 148 */ 149struct nfp_fl_nft_tc_merge { 150 struct net_device *netdev; 151 unsigned long cookie[3]; 152 struct rhash_head hash_node; 153 struct nfp_fl_ct_zone_entry *zt; 154 struct list_head nft_flow_list; 155 struct list_head tc_merge_list; 156 struct nfp_fl_ct_tc_merge *tc_m_parent; 157 struct nfp_fl_ct_flow_entry *nft_parent; 158 unsigned long tc_flower_cookie; 159 struct nfp_fl_payload *flow_pay; 160}; 161 162/** 163 * struct nfp_fl_ct_map_entry - Map between flow cookie and specific ct_flow 164 * @cookie: Flow cookie, same as original TC flow, used as key 165 * @hash_node: Used by the hashtable 166 * @ct_entry: Pointer to corresponding ct_entry 167 */ 168struct nfp_fl_ct_map_entry { 169 unsigned long cookie; 170 struct rhash_head hash_node; 171 struct nfp_fl_ct_flow_entry *ct_entry; 172}; 173 174bool is_pre_ct_flow(struct flow_cls_offload *flow); 175bool is_post_ct_flow(struct flow_cls_offload *flow); 176 177/** 178 * nfp_fl_ct_handle_pre_ct() - Handles -trk conntrack rules 179 * @priv: Pointer to app priv 180 * @netdev: netdev structure. 181 * @flow: TC flower classifier offload structure. 182 * @extack: Extack pointer for errors 183 * 184 * Adds a new entry to the relevant zone table and tries to 185 * merge with other +trk+est entries and offload if possible. 186 * 187 * Return: negative value on error, 0 if configured successfully. 188 */ 189int nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv *priv, 190 struct net_device *netdev, 191 struct flow_cls_offload *flow, 192 struct netlink_ext_ack *extack); 193/** 194 * nfp_fl_ct_handle_post_ct() - Handles +trk+est conntrack rules 195 * @priv: Pointer to app priv 196 * @netdev: netdev structure. 197 * @flow: TC flower classifier offload structure. 198 * @extack: Extack pointer for errors 199 * 200 * Adds a new entry to the relevant zone table and tries to 201 * merge with other -trk entries and offload if possible. 202 * 203 * Return: negative value on error, 0 if configured successfully. 204 */ 205int nfp_fl_ct_handle_post_ct(struct nfp_flower_priv *priv, 206 struct net_device *netdev, 207 struct flow_cls_offload *flow, 208 struct netlink_ext_ack *extack); 209 210/** 211 * nfp_fl_ct_clean_flow_entry() - Free a nfp_fl_ct_flow_entry 212 * @entry: Flow entry to cleanup 213 */ 214void nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry *entry); 215 216/** 217 * nfp_fl_ct_del_flow() - Handle flow_del callbacks for conntrack 218 * @ct_map_ent: ct map entry for the flow that needs deleting 219 */ 220int nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry *ct_map_ent); 221 222/** 223 * nfp_fl_ct_handle_nft_flow() - Handle flower flow callbacks for nft table 224 * @type: Type provided by callback 225 * @type_data: Callback data 226 * @cb_priv: Pointer to data provided when registering the callback, in this 227 * case it's the zone table. 228 */ 229int nfp_fl_ct_handle_nft_flow(enum tc_setup_type type, void *type_data, 230 void *cb_priv); 231#endif 232