f3e1324b41
Multicast incorrectly calls in to drivers with a mutex held causing drivers to have to go through all manner of contortions to use a non sleepable lock. Serialize multicast updates instead. Submitted by: mmacy <mmacy@mattmacy.io> Reviewed by: shurd, sbruno Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D14969
233 lines
8.5 KiB
C
233 lines
8.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988 Stephen Deering.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)igmp_var.h 8.1 (Berkeley) 7/19/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_IGMP_VAR_H_
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#define _NETINET_IGMP_VAR_H_
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/*
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* Internet Group Management Protocol (IGMP),
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* implementation-specific definitions.
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*
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* Written by Steve Deering, Stanford, May 1988.
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*
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* MULTICAST Revision: 3.5.1.3
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*/
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/*
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* IGMPv3 protocol statistics.
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*/
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struct igmpstat {
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/*
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* Structure header (to insulate ABI changes).
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*/
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uint32_t igps_version; /* version of this structure */
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uint32_t igps_len; /* length of this structure */
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/*
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* Message statistics.
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*/
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uint64_t igps_rcv_total; /* total IGMP messages received */
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uint64_t igps_rcv_tooshort; /* received with too few bytes */
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uint64_t igps_rcv_badttl; /* received with ttl other than 1 */
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uint64_t igps_rcv_badsum; /* received with bad checksum */
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/*
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* Query statistics.
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*/
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uint64_t igps_rcv_v1v2_queries; /* received IGMPv1/IGMPv2 queries */
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uint64_t igps_rcv_v3_queries; /* received IGMPv3 queries */
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uint64_t igps_rcv_badqueries; /* received invalid queries */
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uint64_t igps_rcv_gen_queries; /* received general queries */
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uint64_t igps_rcv_group_queries;/* received group queries */
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uint64_t igps_rcv_gsr_queries; /* received group-source queries */
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uint64_t igps_drop_gsr_queries; /* dropped group-source queries */
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/*
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* Report statistics.
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*/
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uint64_t igps_rcv_reports; /* received membership reports */
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uint64_t igps_rcv_badreports; /* received invalid reports */
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uint64_t igps_rcv_ourreports; /* received reports for our groups */
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uint64_t igps_rcv_nora; /* received w/o Router Alert option */
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uint64_t igps_snd_reports; /* sent membership reports */
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/*
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* Padding for future additions.
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*/
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uint64_t __igps_pad[4];
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};
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#define IGPS_VERSION_3 3 /* as of FreeBSD 8.x */
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#define IGPS_VERSION3_LEN 168
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#ifdef CTASSERT
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CTASSERT(sizeof(struct igmpstat) == IGPS_VERSION3_LEN);
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#endif
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/*
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* Identifiers for IGMP sysctl nodes
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*/
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#define IGMPCTL_STATS 1 /* statistics (read-only) */
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#define IGMP_RANDOM_DELAY(X) (random() % (X) + 1)
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#define IGMP_MAX_STATE_CHANGES 24 /* Max pending changes per group */
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/*
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* IGMP per-group states.
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*/
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#define IGMP_NOT_MEMBER 0 /* Can garbage collect in_multi */
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#define IGMP_SILENT_MEMBER 1 /* Do not perform IGMP for group */
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#define IGMP_REPORTING_MEMBER 2 /* IGMPv1/2/3 we are reporter */
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#define IGMP_IDLE_MEMBER 3 /* IGMPv1/2 we reported last */
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#define IGMP_LAZY_MEMBER 4 /* IGMPv1/2 other member reporting */
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#define IGMP_SLEEPING_MEMBER 5 /* IGMPv1/2 start query response */
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#define IGMP_AWAKENING_MEMBER 6 /* IGMPv1/2 group timer will start */
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#define IGMP_G_QUERY_PENDING_MEMBER 7 /* IGMPv3 group query pending */
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#define IGMP_SG_QUERY_PENDING_MEMBER 8 /* IGMPv3 source query pending */
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#define IGMP_LEAVING_MEMBER 9 /* IGMPv3 dying gasp (pending last */
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/* retransmission of INCLUDE {}) */
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/*
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* IGMP version tag.
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*/
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#define IGMP_VERSION_NONE 0 /* Invalid */
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#define IGMP_VERSION_1 1
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#define IGMP_VERSION_2 2
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#define IGMP_VERSION_3 3 /* Default */
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/*
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* IGMPv3 protocol control variables.
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*/
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#define IGMP_RV_INIT 2 /* Robustness Variable */
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#define IGMP_RV_MIN 1
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#define IGMP_RV_MAX 7
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#define IGMP_QI_INIT 125 /* Query Interval (s) */
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#define IGMP_QI_MIN 1
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#define IGMP_QI_MAX 255
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#define IGMP_QRI_INIT 10 /* Query Response Interval (s) */
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#define IGMP_QRI_MIN 1
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#define IGMP_QRI_MAX 255
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#define IGMP_URI_INIT 3 /* Unsolicited Report Interval (s) */
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#define IGMP_URI_MIN 0
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#define IGMP_URI_MAX 10
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#define IGMP_MAX_G_GS_PACKETS 8 /* # of packets to answer G/GS */
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#define IGMP_MAX_STATE_CHANGE_PACKETS 8 /* # of packets per state change */
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#define IGMP_MAX_RESPONSE_PACKETS 16 /* # of packets for general query */
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#define IGMP_MAX_RESPONSE_BURST 4 /* # of responses to send at once */
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#define IGMP_RESPONSE_BURST_INTERVAL (PR_FASTHZ / 2) /* 500ms */
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/*
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* IGMP-specific mbuf flags.
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*/
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#define M_IGMPV2 M_PROTO1 /* Packet is IGMPv2 */
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#define M_IGMPV3_HDR M_PROTO2 /* Packet has IGMPv3 headers */
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#define M_GROUPREC M_PROTO3 /* mbuf chain is a group record */
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#define M_IGMP_LOOP M_PROTO4 /* transmit on loif, not real ifp */
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/*
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* Default amount of leading space for IGMPv3 to allocate at the
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* beginning of its mbuf packet chains, to avoid fragmentation and
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* unnecessary allocation of leading mbufs.
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*/
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#define RAOPT_LEN 4 /* Length of IP Router Alert option */
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#define IGMP_LEADINGSPACE \
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(sizeof(struct ip) + RAOPT_LEN + sizeof(struct igmp_report))
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/*
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* Structure returned by net.inet.igmp.ifinfo sysctl.
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*/
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struct igmp_ifinfo {
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uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
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uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
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uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
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uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
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uint32_t igi_flags; /* IGMP per-interface flags */
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#define IGIF_SILENT 0x00000001 /* Do not use IGMP on this ifp */
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#define IGIF_LOOPBACK 0x00000002 /* Send IGMP reports to loopback */
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uint32_t igi_rv; /* IGMPv3 Robustness Variable */
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uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
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uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
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uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
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};
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#ifdef _KERNEL
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#define IGMPSTAT_ADD(name, val) V_igmpstat.name += (val)
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#define IGMPSTAT_INC(name) IGMPSTAT_ADD(name, 1)
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/*
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* Subsystem lock macros.
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* The IGMP lock is only taken with IGMP. Currently it is system-wide.
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* VIMAGE: The lock could be pushed to per-VIMAGE granularity in future.
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*/
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#define IGMP_LOCK_INIT() mtx_init(&igmp_mtx, "igmp_mtx", NULL, MTX_DEF)
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#define IGMP_LOCK_DESTROY() mtx_destroy(&igmp_mtx)
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#define IGMP_LOCK() mtx_lock(&igmp_mtx)
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#define IGMP_LOCK_ASSERT() mtx_assert(&igmp_mtx, MA_OWNED)
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#define IGMP_UNLOCK() mtx_unlock(&igmp_mtx)
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#define IGMP_UNLOCK_ASSERT() mtx_assert(&igmp_mtx, MA_NOTOWNED)
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/*
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* Per-interface IGMP router version information.
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*/
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struct igmp_ifsoftc {
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LIST_ENTRY(igmp_ifsoftc) igi_link;
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struct ifnet *igi_ifp; /* pointer back to interface */
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uint32_t igi_version; /* IGMPv3 Host Compatibility Mode */
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uint32_t igi_v1_timer; /* IGMPv1 Querier Present timer (s) */
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uint32_t igi_v2_timer; /* IGMPv2 Querier Present timer (s) */
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uint32_t igi_v3_timer; /* IGMPv3 General Query (interface) timer (s)*/
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uint32_t igi_flags; /* IGMP per-interface flags */
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uint32_t igi_rv; /* IGMPv3 Robustness Variable */
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uint32_t igi_qi; /* IGMPv3 Query Interval (s) */
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uint32_t igi_qri; /* IGMPv3 Query Response Interval (s) */
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uint32_t igi_uri; /* IGMPv3 Unsolicited Report Interval (s) */
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struct mbufq igi_gq; /* general query responses queue */
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};
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int igmp_change_state(struct in_multi *);
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void igmp_fasttimo(void);
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struct igmp_ifsoftc *
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igmp_domifattach(struct ifnet *);
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void igmp_domifdetach(struct ifnet *);
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void igmp_ifdetach(struct ifnet *);
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int igmp_input(struct mbuf **, int *, int);
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void igmp_slowtimo(void);
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SYSCTL_DECL(_net_inet_igmp);
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#endif /* _KERNEL */
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#endif
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