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 /* NFP flow entry flags. */ 107 #define NFP_FL_ACTION_DO_NAT BIT(0) 108 #define NFP_FL_ACTION_DO_MANGLE BIT(1) 109 110 /** 111 * struct nfp_fl_ct_flow_entry - Flow entry containing conntrack flow information 112 * @cookie: Flow cookie, same as original TC flow, used as key 113 * @list_node: Used by the list 114 * @chain_index: Chain index of the original flow 115 * @netdev: netdev structure. 116 * @type: Type of pre-entry from enum ct_entry_type 117 * @zt: Reference to the zone table this belongs to 118 * @children: List of tc_merge flows this flow forms part of 119 * @rule: Reference to the original TC flow rule 120 * @stats: Used to cache stats for updating 121 * @tun_offset: Used to indicate tunnel action offset in action list 122 * @flags: Used to indicate flow flag like NAT which used by merge. 123 */ 124 struct nfp_fl_ct_flow_entry { 125 unsigned long cookie; 126 struct list_head list_node; 127 u32 chain_index; 128 enum ct_entry_type type; 129 struct net_device *netdev; 130 struct nfp_fl_ct_zone_entry *zt; 131 struct list_head children; 132 struct flow_rule *rule; 133 struct flow_stats stats; 134 u8 tun_offset; // Set to NFP_FL_CT_NO_TUN if no tun 135 u8 flags; 136 }; 137 138 /** 139 * struct nfp_fl_ct_tc_merge - Merge of two flows from tc 140 * @cookie: Flow cookie, combination of pre and post ct cookies 141 * @hash_node: Used by the hashtable 142 * @pre_ct_list: This entry is part of a pre_ct_list 143 * @post_ct_list: This entry is part of a post_ct_list 144 * @zt: Reference to the zone table this belongs to 145 * @pre_ct_parent: The pre_ct_parent 146 * @post_ct_parent: The post_ct_parent 147 * @children: List of nft merged entries 148 */ 149 struct nfp_fl_ct_tc_merge { 150 unsigned long cookie[2]; 151 struct rhash_head hash_node; 152 struct list_head pre_ct_list; 153 struct list_head post_ct_list; 154 struct nfp_fl_ct_zone_entry *zt; 155 struct nfp_fl_ct_flow_entry *pre_ct_parent; 156 struct nfp_fl_ct_flow_entry *post_ct_parent; 157 struct list_head children; 158 }; 159 160 /** 161 * struct nfp_fl_nft_tc_merge - Merge of tc_merge flows with nft flow 162 * @netdev: Ingress netdev name 163 * @cookie: Flow cookie, combination of tc_merge and nft cookies 164 * @hash_node: Used by the hashtable 165 * @zt: Reference to the zone table this belongs to 166 * @nft_flow_list: This entry is part of a nft_flows_list 167 * @tc_merge_list: This entry is part of a ct_merge_list 168 * @tc_m_parent: The tc_merge parent 169 * @nft_parent: The nft_entry parent 170 * @tc_flower_cookie: The cookie of the flow offloaded to the nfp 171 * @flow_pay: Reference to the offloaded flow struct 172 */ 173 struct nfp_fl_nft_tc_merge { 174 struct net_device *netdev; 175 unsigned long cookie[3]; 176 struct rhash_head hash_node; 177 struct nfp_fl_ct_zone_entry *zt; 178 struct list_head nft_flow_list; 179 struct list_head tc_merge_list; 180 struct nfp_fl_ct_tc_merge *tc_m_parent; 181 struct nfp_fl_ct_flow_entry *nft_parent; 182 unsigned long tc_flower_cookie; 183 struct nfp_fl_payload *flow_pay; 184 }; 185 186 /** 187 * struct nfp_fl_ct_map_entry - Map between flow cookie and specific ct_flow 188 * @cookie: Flow cookie, same as original TC flow, used as key 189 * @hash_node: Used by the hashtable 190 * @ct_entry: Pointer to corresponding ct_entry 191 */ 192 struct nfp_fl_ct_map_entry { 193 unsigned long cookie; 194 struct rhash_head hash_node; 195 struct nfp_fl_ct_flow_entry *ct_entry; 196 }; 197 198 bool is_pre_ct_flow(struct flow_cls_offload *flow); 199 bool is_post_ct_flow(struct flow_cls_offload *flow); 200 201 /** 202 * nfp_fl_ct_handle_pre_ct() - Handles -trk conntrack rules 203 * @priv: Pointer to app priv 204 * @netdev: netdev structure. 205 * @flow: TC flower classifier offload structure. 206 * @extack: Extack pointer for errors 207 * 208 * Adds a new entry to the relevant zone table and tries to 209 * merge with other +trk+est entries and offload if possible. 210 * 211 * Return: negative value on error, 0 if configured successfully. 212 */ 213 int nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv *priv, 214 struct net_device *netdev, 215 struct flow_cls_offload *flow, 216 struct netlink_ext_ack *extack); 217 /** 218 * nfp_fl_ct_handle_post_ct() - Handles +trk+est conntrack rules 219 * @priv: Pointer to app priv 220 * @netdev: netdev structure. 221 * @flow: TC flower classifier offload structure. 222 * @extack: Extack pointer for errors 223 * 224 * Adds a new entry to the relevant zone table and tries to 225 * merge with other -trk entries and offload if possible. 226 * 227 * Return: negative value on error, 0 if configured successfully. 228 */ 229 int nfp_fl_ct_handle_post_ct(struct nfp_flower_priv *priv, 230 struct net_device *netdev, 231 struct flow_cls_offload *flow, 232 struct netlink_ext_ack *extack); 233 234 /** 235 * nfp_fl_ct_clean_flow_entry() - Free a nfp_fl_ct_flow_entry 236 * @entry: Flow entry to cleanup 237 */ 238 void nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry *entry); 239 240 /** 241 * nfp_fl_ct_del_flow() - Handle flow_del callbacks for conntrack 242 * @ct_map_ent: ct map entry for the flow that needs deleting 243 */ 244 int nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry *ct_map_ent); 245 246 /** 247 * nfp_fl_ct_handle_nft_flow() - Handle flower flow callbacks for nft table 248 * @type: Type provided by callback 249 * @type_data: Callback data 250 * @cb_priv: Pointer to data provided when registering the callback, in this 251 * case it's the zone table. 252 */ 253 int nfp_fl_ct_handle_nft_flow(enum tc_setup_type type, void *type_data, 254 void *cb_priv); 255 256 /** 257 * nfp_fl_ct_stats() - Handle flower stats callbacks for ct flows 258 * @flow: TC flower classifier offload structure. 259 * @ct_map_ent: ct map entry for the flow that needs deleting 260 */ 261 int nfp_fl_ct_stats(struct flow_cls_offload *flow, 262 struct nfp_fl_ct_map_entry *ct_map_ent); 263 #endif 264