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Currently icmp_id_map[][] stores information about ping sockets in a bespoke structure. Move the same information into new types of flow in the flow table. To match that change, replace the existing ICMP timer with a flow-based timer for expiring ping sockets. This has the advantage that we only need to scan the active flows, not all possible ids. We convert icmp_id_map[][] to point to the flow table entries, rather than containing its own information. We do still use that array for locating the right ping flows, rather than using a "flow native" form of lookup for the time being. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: Update id_sock description in comment to icmp_ping_new()] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
32 lines
770 B
C
32 lines
770 B
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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* ICMP flow tracking data structures
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*/
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#ifndef ICMP_FLOW_H
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#define ICMP_FLOW_H
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/**
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* struct icmp_ping_flow - Descriptor for a flow of ping requests/replies
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* @f: Generic flow information
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* @seq: Last sequence number sent to tap, host order, -1: not sent yet
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* @sock: "ping" socket
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* @ts: Last associated activity from tap, seconds
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* @id: ICMP id for the flow as seen by the guest
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*/
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struct icmp_ping_flow {
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/* Must be first element */
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struct flow_common f;
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int seq;
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int sock;
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time_t ts;
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uint16_t id;
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};
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bool icmp_ping_timer(const struct ctx *c, union flow *flow,
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const struct timespec *now);
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#endif /* ICMP_FLOW_H */
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