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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright Red Hat
* Author: David Gibson <david@gibson.dropbear.id.au>
*
* Definitions for the global table of packet flows.
*/
#ifndef FLOW_TABLE_H
#define FLOW_TABLE_H
/**
* union flow - Descriptor for a logical packet flow (e.g. connection)
* @f: Fields common between all variants
* @tcp: Fields for non-spliced TCP connections
* @tcp_splice: Fields for spliced TCP connections
*/
union flow {
struct flow_common f;
struct tcp_tap_conn tcp;
struct tcp_splice_conn tcp_splice;
};
/* Global Flow Table */
extern union flow flowtab[];
/** flow_idx - Index of flow from common structure
* @f: Common flow fields pointer
*
* Return: index of @f in the flow table
*/
static inline unsigned flow_idx(const struct flow_common *f)
{
return (union flow *)f - flowtab;
}
/** FLOW_IDX - Find the index of a flow
* @f_: Flow pointer, either union flow * or protocol specific
*
* Return: index of @f in the flow table
*/
#define FLOW_IDX(f_) (flow_idx(&(f_)->f))
/** FLOW - Flow entry at a given index
* @idx: Flow index
*
* Return: pointer to entry @idx in the flow table
*/
#define FLOW(idx) (&flowtab[(idx)])
#endif /* FLOW_TABLE_H */
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