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tcp_table_compact() will move entries in the connection/flow table to keep it compact when other entries are removed. The moved entries need not have the same type as the flow removed, so it needs to be able to handle moving any type of flow. Therefore, move it to flow.c rather than being purportedly TCP specific. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright Red Hat
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* Author: David Gibson <david@gibson.dropbear.id.au>
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*
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* Tracking for logical "flows" of packets.
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*/
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#ifndef FLOW_H
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#define FLOW_H
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/**
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* enum flow_type - Different types of packet flows we track
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*/
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enum flow_type {
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/* Represents an invalid or unused flow */
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FLOW_TYPE_NONE = 0,
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/* A TCP connection between a socket and tap interface */
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FLOW_TCP,
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/* A TCP connection between a host socket and ns socket */
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FLOW_TCP_SPLICE,
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FLOW_NUM_TYPES,
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};
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extern const char *flow_type_str[];
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#define FLOW_TYPE(f) \
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((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
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/**
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* struct flow_common - Common fields for packet flows
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* @type: Type of packet flow
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*/
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struct flow_common {
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uint8_t type;
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};
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#define FLOW_INDEX_BITS 17 /* 128k - 1 */
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#define FLOW_MAX MAX_FROM_BITS(FLOW_INDEX_BITS)
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#define FLOW_TABLE_PRESSURE 30 /* % of FLOW_MAX */
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#define FLOW_FILE_PRESSURE 30 /* % of c->nofile */
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union flow;
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void flow_table_compact(struct ctx *c, union flow *hole);
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#endif /* FLOW_H */
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