linux/drivers/net/ethernet/sfc/tc_conntrack.c

// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2023, Advanced Micro Devices, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include "tc_conntrack.h"
#include "tc.h"
#include "mae.h"

static int efx_tc_flow_block(enum tc_setup_type type, void *type_data,
			     void *cb_priv);

static const struct rhashtable_params efx_tc_ct_zone_ht_params = …;

static const struct rhashtable_params efx_tc_ct_ht_params = …;

static void efx_tc_ct_zone_free(void *ptr, void *arg)
{ … }

static void efx_tc_ct_free(void *ptr, void *arg)
{ … }

int efx_tc_init_conntrack(struct efx_nic *efx)
{ … }

/* Only call this in init failure teardown.
 * Normal exit should fini instead as there may be entries in the table.
 */
void efx_tc_destroy_conntrack(struct efx_nic *efx)
{ … }

void efx_tc_fini_conntrack(struct efx_nic *efx)
{ … }

#define EFX_NF_TCP_FLAG(flg) …

static int efx_tc_ct_parse_match(struct efx_nic *efx, struct flow_rule *fr,
				 struct efx_tc_ct_entry *conn)
{ … }

/**
 * struct efx_tc_ct_mangler_state - tracks which fields have been pedited
 *
 * @ipv4: IP source or destination addr has been set
 * @tcpudp: TCP/UDP source or destination port has been set
 */
struct efx_tc_ct_mangler_state { … };

static int efx_tc_ct_mangle(struct efx_nic *efx, struct efx_tc_ct_entry *conn,
			    const struct flow_action_entry *fa,
			    struct efx_tc_ct_mangler_state *mung)
{ … }

static int efx_tc_ct_replace(struct efx_tc_ct_zone *ct_zone,
			     struct flow_cls_offload *tc)
{ … }

/* Caller must follow with efx_tc_ct_remove_finish() after RCU grace period! */
static void efx_tc_ct_remove(struct efx_nic *efx, struct efx_tc_ct_entry *conn)
{ … }

static void efx_tc_ct_remove_finish(struct efx_nic *efx, struct efx_tc_ct_entry *conn)
{ … }

static int efx_tc_ct_destroy(struct efx_tc_ct_zone *ct_zone,
			     struct flow_cls_offload *tc)
{ … }

static int efx_tc_ct_stats(struct efx_tc_ct_zone *ct_zone,
			   struct flow_cls_offload *tc)
{ … }

static int efx_tc_flow_block(enum tc_setup_type type, void *type_data,
			     void *cb_priv)
{ … }

struct efx_tc_ct_zone *efx_tc_ct_register_zone(struct efx_nic *efx, u16 zone,
					       struct nf_flowtable *ct_ft)
{ … }

void efx_tc_ct_unregister_zone(struct efx_nic *efx,
			       struct efx_tc_ct_zone *ct_zone)
{ … }