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 32 extern const struct rhashtable_params nfp_zone_table_params; 33 extern const struct rhashtable_params nfp_ct_map_params; 34 extern const struct rhashtable_params nfp_tc_ct_merge_params; 35 extern 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 */ 59 struct 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 82 enum ct_entry_type { 83 CT_TYPE_PRE_CT, 84 CT_TYPE_NFT, 85 CT_TYPE_POST_CT, 86 _CT_TYPE_MAX, 87 }; 88 89 enum nfp_nfp_layer_name { 90 FLOW_PAY_META_TCI = 0, 91 FLOW_PAY_INPORT, 92 FLOW_PAY_EXT_META, 93 FLOW_PAY_MAC_MPLS, 94 FLOW_PAY_L4, 95 FLOW_PAY_IPV4, 96 FLOW_PAY_IPV6, 97 FLOW_PAY_CT, 98 FLOW_PAY_GRE, 99 FLOW_PAY_QINQ, 100 FLOW_PAY_UDP_TUN, 101 FLOW_PAY_GENEVE_OPT, 102 103 _FLOW_PAY_LAYERS_MAX 104 }; 105 106 /** 107 * struct nfp_fl_ct_flow_entry - Flow entry containing conntrack flow information 108 * @cookie: Flow cookie, same as original TC flow, used as key 109 * @list_node: Used by the list 110 * @chain_index: Chain index of the original flow 111 * @netdev: netdev structure. 112 * @type: Type of pre-entry from enum ct_entry_type 113 * @zt: Reference to the zone table this belongs to 114 * @children: List of tc_merge flows this flow forms part of 115 * @rule: Reference to the original TC flow rule 116 * @stats: Used to cache stats for updating 117 * @tun_offset: Used to indicate tunnel action offset in action list 118 */ 119 struct nfp_fl_ct_flow_entry { 120 unsigned long cookie; 121 struct list_head list_node; 122 u32 chain_index; 123 enum ct_entry_type type; 124 struct net_device *netdev; 125 struct nfp_fl_ct_zone_entry *zt; 126 struct list_head children; 127 struct flow_rule *rule; 128 struct flow_stats stats; 129 u8 tun_offset; // Set to NFP_FL_CT_NO_TUN if no tun 130 }; 131 132 /** 133 * struct nfp_fl_ct_tc_merge - Merge of two flows from tc 134 * @cookie: Flow cookie, combination of pre and post ct cookies 135 * @hash_node: Used by the hashtable 136 * @pre_ct_list: This entry is part of a pre_ct_list 137 * @post_ct_list: This entry is part of a post_ct_list 138 * @zt: Reference to the zone table this belongs to 139 * @pre_ct_parent: The pre_ct_parent 140 * @post_ct_parent: The post_ct_parent 141 * @children: List of nft merged entries 142 */ 143 struct nfp_fl_ct_tc_merge { 144 unsigned long cookie[2]; 145 struct rhash_head hash_node; 146 struct list_head pre_ct_list; 147 struct list_head post_ct_list; 148 struct nfp_fl_ct_zone_entry *zt; 149 struct nfp_fl_ct_flow_entry *pre_ct_parent; 150 struct nfp_fl_ct_flow_entry *post_ct_parent; 151 struct list_head children; 152 }; 153 154 /** 155 * struct nfp_fl_nft_tc_merge - Merge of tc_merge flows with nft flow 156 * @netdev: Ingress netdev name 157 * @cookie: Flow cookie, combination of tc_merge and nft cookies 158 * @hash_node: Used by the hashtable 159 * @zt: Reference to the zone table this belongs to 160 * @nft_flow_list: This entry is part of a nft_flows_list 161 * @tc_merge_list: This entry is part of a ct_merge_list 162 * @tc_m_parent: The tc_merge parent 163 * @nft_parent: The nft_entry parent 164 * @tc_flower_cookie: The cookie of the flow offloaded to the nfp 165 * @flow_pay: Reference to the offloaded flow struct 166 */ 167 struct nfp_fl_nft_tc_merge { 168 struct net_device *netdev; 169 unsigned long cookie[3]; 170 struct rhash_head hash_node; 171 struct nfp_fl_ct_zone_entry *zt; 172 struct list_head nft_flow_list; 173 struct list_head tc_merge_list; 174 struct nfp_fl_ct_tc_merge *tc_m_parent; 175 struct nfp_fl_ct_flow_entry *nft_parent; 176 unsigned long tc_flower_cookie; 177 struct nfp_fl_payload *flow_pay; 178 }; 179 180 /** 181 * struct nfp_fl_ct_map_entry - Map between flow cookie and specific ct_flow 182 * @cookie: Flow cookie, same as original TC flow, used as key 183 * @hash_node: Used by the hashtable 184 * @ct_entry: Pointer to corresponding ct_entry 185 */ 186 struct nfp_fl_ct_map_entry { 187 unsigned long cookie; 188 struct rhash_head hash_node; 189 struct nfp_fl_ct_flow_entry *ct_entry; 190 }; 191 192 bool is_pre_ct_flow(struct flow_cls_offload *flow); 193 bool is_post_ct_flow(struct flow_cls_offload *flow); 194 195 /** 196 * nfp_fl_ct_handle_pre_ct() - Handles -trk conntrack rules 197 * @priv: Pointer to app priv 198 * @netdev: netdev structure. 199 * @flow: TC flower classifier offload structure. 200 * @extack: Extack pointer for errors 201 * 202 * Adds a new entry to the relevant zone table and tries to 203 * merge with other +trk+est entries and offload if possible. 204 * 205 * Return: negative value on error, 0 if configured successfully. 206 */ 207 int nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv *priv, 208 struct net_device *netdev, 209 struct flow_cls_offload *flow, 210 struct netlink_ext_ack *extack); 211 /** 212 * nfp_fl_ct_handle_post_ct() - Handles +trk+est conntrack rules 213 * @priv: Pointer to app priv 214 * @netdev: netdev structure. 215 * @flow: TC flower classifier offload structure. 216 * @extack: Extack pointer for errors 217 * 218 * Adds a new entry to the relevant zone table and tries to 219 * merge with other -trk entries and offload if possible. 220 * 221 * Return: negative value on error, 0 if configured successfully. 222 */ 223 int nfp_fl_ct_handle_post_ct(struct nfp_flower_priv *priv, 224 struct net_device *netdev, 225 struct flow_cls_offload *flow, 226 struct netlink_ext_ack *extack); 227 228 /** 229 * nfp_fl_ct_clean_flow_entry() - Free a nfp_fl_ct_flow_entry 230 * @entry: Flow entry to cleanup 231 */ 232 void nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry *entry); 233 234 /** 235 * nfp_fl_ct_del_flow() - Handle flow_del callbacks for conntrack 236 * @ct_map_ent: ct map entry for the flow that needs deleting 237 */ 238 int nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry *ct_map_ent); 239 240 /** 241 * nfp_fl_ct_handle_nft_flow() - Handle flower flow callbacks for nft table 242 * @type: Type provided by callback 243 * @type_data: Callback data 244 * @cb_priv: Pointer to data provided when registering the callback, in this 245 * case it's the zone table. 246 */ 247 int nfp_fl_ct_handle_nft_flow(enum tc_setup_type type, void *type_data, 248 void *cb_priv); 249 250 /** 251 * nfp_fl_ct_stats() - Handle flower stats callbacks for ct flows 252 * @flow: TC flower classifier offload structure. 253 * @ct_map_ent: ct map entry for the flow that needs deleting 254 */ 255 int nfp_fl_ct_stats(struct flow_cls_offload *flow, 256 struct nfp_fl_ct_map_entry *ct_map_ent); 257 #endif 258