/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2021 Corigine, Inc. */
#ifndef __NFP_FLOWER_CONNTRACK_H__
#define __NFP_FLOWER_CONNTRACK_H__ 1
#include <net/netfilter/nf_flow_table.h>
#include "main.h"
#define NFP_FL_CT_NO_TUN 0xff
#define COMPARE_UNMASKED_FIELDS(__match1, __match2, __out) \
do { \
typeof(__match1) _match1 = (__match1); \
typeof(__match2) _match2 = (__match2); \
bool *_out = (__out); \
int i, size = sizeof(*(_match1).key); \
char *k1, *m1, *k2, *m2; \
*_out = false; \
k1 = (char *)_match1.key; \
m1 = (char *)_match1.mask; \
k2 = (char *)_match2.key; \
m2 = (char *)_match2.mask; \
for (i = 0; i < size; i++) \
if ((k1[i] & m1[i] & m2[i]) ^ \
(k2[i] & m1[i] & m2[i])) { \
*_out = true; \
break; \
} \
} while (0) \
extern const struct rhashtable_params nfp_zone_table_params;
extern const struct rhashtable_params nfp_ct_map_params;
extern const struct rhashtable_params nfp_tc_ct_merge_params;
extern const struct rhashtable_params nfp_nft_ct_merge_params;
/**
* struct nfp_fl_ct_zone_entry - Zone entry containing conntrack flow information
* @zone: The zone number, used as lookup key in hashtable
* @hash_node: Used by the hashtable
* @priv: Pointer to nfp_flower_priv data
* @nft: Pointer to nf_flowtable for this zone
*
* @pre_ct_list: The pre_ct_list of nfp_fl_ct_flow_entry entries
* @pre_ct_count: Keep count of the number of pre_ct entries
*
* @post_ct_list: The post_ct_list of nfp_fl_ct_flow_entry entries
* @post_ct_count: Keep count of the number of post_ct entries
*
* @tc_merge_tb: The table of merged tc flows
* @tc_merge_count: Keep count of the number of merged tc entries
*
* @nft_flows_list: The list of nft relatednfp_fl_ct_flow_entry entries
* @nft_flows_count: Keep count of the number of nft_flow entries
*
* @nft_merge_tb: The table of merged tc+nft flows
* @nft_merge_count: Keep count of the number of merged tc+nft entries
*/
struct nfp_fl_ct_zone_entry {
u16 zone;
struct rhash_head hash_node;
struct nfp_flower_priv *priv;
struct nf_flowtable *nft;
struct list_head pre_ct_list;
unsigned int pre_ct_count;
struct list_head post_ct_list;
unsigned int post_ct_count;
struct rhashtable tc_merge_tb;
unsigned int tc_merge_count;
struct list_head nft_flows_list;
unsigned int nft_flows_count;
struct rhashtable nft_merge_tb;
unsigned int nft_merge_count;
};
enum ct_entry_type {
CT_TYPE_PRE_CT,
CT_TYPE_NFT,
CT_TYPE_POST_CT,
_CT_TYPE_MAX,
};
#define NFP_MAX_RECIRC_CT_ZONES 4
#define NFP_MAX_ENTRY_RULES (NFP_MAX_RECIRC_CT_ZONES * 2 + 1)
enum nfp_nfp_layer_name {
FLOW_PAY_META_TCI = 0,
FLOW_PAY_INPORT,
FLOW_PAY_EXT_META,
FLOW_PAY_MAC_MPLS,
FLOW_PAY_L4,
FLOW_PAY_IPV4,
FLOW_PAY_IPV6,
FLOW_PAY_CT,
FLOW_PAY_GRE,
FLOW_PAY_QINQ,
FLOW_PAY_UDP_TUN,
FLOW_PAY_GENEVE_OPT,
_FLOW_PAY_LAYERS_MAX
};
/* NFP flow entry flags. */
#define NFP_FL_ACTION_DO_NAT BIT(0)
#define NFP_FL_ACTION_DO_MANGLE BIT(1)
/**
* struct nfp_fl_ct_flow_entry - Flow entry containing conntrack flow information
* @cookie: Flow cookie, same as original TC flow, used as key
* @list_node: Used by the list
* @chain_index: Chain index of the original flow
* @goto_chain_index: goto chain index of the flow
* @netdev: netdev structure.
* @zt: Reference to the zone table this belongs to
* @children: List of tc_merge flows this flow forms part of
* @rule: Reference to the original TC flow rule
* @stats: Used to cache stats for updating
* @prev_m_entries: Array of all previous nft_tc_merge entries
* @num_prev_m_entries: The number of all previous nft_tc_merge entries
* @tun_offset: Used to indicate tunnel action offset in action list
* @flags: Used to indicate flow flag like NAT which used by merge.
* @type: Type of ct-entry from enum ct_entry_type
*/
struct nfp_fl_ct_flow_entry {
unsigned long cookie;
struct list_head list_node;
u32 chain_index;
u32 goto_chain_index;
struct net_device *netdev;
struct nfp_fl_ct_zone_entry *zt;
struct list_head children;
struct flow_rule *rule;
struct flow_stats stats;
struct nfp_fl_nft_tc_merge *prev_m_entries[NFP_MAX_RECIRC_CT_ZONES - 1];
u8 num_prev_m_entries;
u8 tun_offset; // Set to NFP_FL_CT_NO_TUN if no tun
u8 flags;
u8 type;
};
/**
* struct nfp_fl_ct_tc_merge - Merge of two flows from tc
* @cookie: Flow cookie, combination of pre and post ct cookies
* @hash_node: Used by the hashtable
* @pre_ct_list: This entry is part of a pre_ct_list
* @post_ct_list: This entry is part of a post_ct_list
* @zt: Reference to the zone table this belongs to
* @pre_ct_parent: The pre_ct_parent
* @post_ct_parent: The post_ct_parent
* @children: List of nft merged entries
*/
struct nfp_fl_ct_tc_merge {
unsigned long cookie[2];
struct rhash_head hash_node;
struct list_head pre_ct_list;
struct list_head post_ct_list;
struct nfp_fl_ct_zone_entry *zt;
struct nfp_fl_ct_flow_entry *pre_ct_parent;
struct nfp_fl_ct_flow_entry *post_ct_parent;
struct list_head children;
};
/**
* struct nfp_fl_nft_tc_merge - Merge of tc_merge flows with nft flow
* @netdev: Ingress netdev name
* @cookie: Flow cookie, combination of tc_merge and nft cookies
* @hash_node: Used by the hashtable
* @zt: Reference to the zone table this belongs to
* @nft_flow_list: This entry is part of a nft_flows_list
* @tc_merge_list: This entry is part of a ct_merge_list
* @tc_m_parent: The tc_merge parent
* @nft_parent: The nft_entry parent
* @tc_flower_cookie: The cookie of the flow offloaded to the nfp
* @flow_pay: Reference to the offloaded flow struct
* @next_pre_ct_entry: Reference to the next ct zone pre ct entry
*/
struct nfp_fl_nft_tc_merge {
struct net_device *netdev;
unsigned long cookie[3];
struct rhash_head hash_node;
struct nfp_fl_ct_zone_entry *zt;
struct list_head nft_flow_list;
struct list_head tc_merge_list;
struct nfp_fl_ct_tc_merge *tc_m_parent;
struct nfp_fl_ct_flow_entry *nft_parent;
unsigned long tc_flower_cookie;
struct nfp_fl_payload *flow_pay;
struct nfp_fl_ct_flow_entry *next_pre_ct_entry;
};
/**
* struct nfp_fl_ct_map_entry - Map between flow cookie and specific ct_flow
* @cookie: Flow cookie, same as original TC flow, used as key
* @hash_node: Used by the hashtable
* @ct_entry: Pointer to corresponding ct_entry
*/
struct nfp_fl_ct_map_entry {
unsigned long cookie;
struct rhash_head hash_node;
struct nfp_fl_ct_flow_entry *ct_entry;
};
bool is_pre_ct_flow(struct flow_cls_offload *flow);
bool is_post_ct_flow(struct flow_cls_offload *flow);
/**
* nfp_fl_ct_handle_pre_ct() - Handles -trk conntrack rules
* @priv: Pointer to app priv
* @netdev: netdev structure.
* @flow: TC flower classifier offload structure.
* @extack: Extack pointer for errors
* @m_entry:previous nfp_fl_nft_tc_merge entry
*
* Adds a new entry to the relevant zone table and tries to
* merge with other +trk+est entries and offload if possible.
*
* Return: negative value on error, 0 if configured successfully.
*/
int nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv *priv,
struct net_device *netdev,
struct flow_cls_offload *flow,
struct netlink_ext_ack *extack,
struct nfp_fl_nft_tc_merge *m_entry);
/**
* nfp_fl_ct_handle_post_ct() - Handles +trk+est conntrack rules
* @priv: Pointer to app priv
* @netdev: netdev structure.
* @flow: TC flower classifier offload structure.
* @extack: Extack pointer for errors
*
* Adds a new entry to the relevant zone table and tries to
* merge with other -trk entries and offload if possible.
*
* Return: negative value on error, 0 if configured successfully.
*/
int nfp_fl_ct_handle_post_ct(struct nfp_flower_priv *priv,
struct net_device *netdev,
struct flow_cls_offload *flow,
struct netlink_ext_ack *extack);
/**
* nfp_fl_create_new_pre_ct() - create next ct_zone -trk conntrack rules
* @m_entry:previous nfp_fl_nft_tc_merge entry
*
* Create a new pre_ct entry from previous nfp_fl_nft_tc_merge entry
* to the next relevant zone table. Try to merge with other +trk+est
* entries and offload if possible. The created new pre_ct entry is
* linked to the previous nfp_fl_nft_tc_merge entry.
*
* Return: negative value on error, 0 if configured successfully.
*/
int nfp_fl_create_new_pre_ct(struct nfp_fl_nft_tc_merge *m_entry);
/**
* nfp_fl_ct_clean_flow_entry() - Free a nfp_fl_ct_flow_entry
* @entry: Flow entry to cleanup
*/
void nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry *entry);
/**
* nfp_fl_ct_del_flow() - Handle flow_del callbacks for conntrack
* @ct_map_ent: ct map entry for the flow that needs deleting
*/
int nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry *ct_map_ent);
/**
* nfp_fl_ct_handle_nft_flow() - Handle flower flow callbacks for nft table
* @type: Type provided by callback
* @type_data: Callback data
* @cb_priv: Pointer to data provided when registering the callback, in this
* case it's the zone table.
*/
int nfp_fl_ct_handle_nft_flow(enum tc_setup_type type, void *type_data,
void *cb_priv);
/**
* nfp_fl_ct_stats() - Handle flower stats callbacks for ct flows
* @flow: TC flower classifier offload structure.
* @ct_map_ent: ct map entry for the flow that needs deleting
*/
int nfp_fl_ct_stats(struct flow_cls_offload *flow,
struct nfp_fl_ct_map_entry *ct_map_ent);
#endif
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