fa554de774
Reduce the default log level for netlink to LOG_INFO. This removes a
number of messages such as
> [nl_iface] dump_sa: unsupported family: 0, skipping
or
> [nl_iface] get_operstate_ether: error calling SIOCGIFMEDIA on vlan0: 22
that are useful for debugging, but not for most users.
Reviewed by: melifaro
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D40062
145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/ck.h>
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#include <sys/epoch.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <net/route.h>
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#include <net/route/route_ctl.h>
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#include <netlink/netlink.h>
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#include <netlink/netlink_ctl.h>
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#include <netlink/netlink_route.h>
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#include <netlink/route/route_var.h>
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#define DEBUG_MOD_NAME nl_route_core
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#define DEBUG_MAX_LEVEL LOG_DEBUG3
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#include <netlink/netlink_debug.h>
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_DECLARE_DEBUG(LOG_INFO);
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#define HANDLER_MAX_NUM (NL_RTM_MAX + 10)
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static const struct rtnl_cmd_handler *rtnl_handler[HANDLER_MAX_NUM] = {};
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bool
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rtnl_register_messages(const struct rtnl_cmd_handler *handlers, int count)
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{
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for (int i = 0; i < count; i++) {
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if (handlers[i].cmd >= HANDLER_MAX_NUM)
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return (false);
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MPASS(rtnl_handler[handlers[i].cmd] == NULL);
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}
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for (int i = 0; i < count; i++)
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rtnl_handler[handlers[i].cmd] = &handlers[i];
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return (true);
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}
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/*
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* Handler called by netlink subsystem when matching netlink message is received
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*/
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static int
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rtnl_handle_message(struct nlmsghdr *hdr, struct nl_pstate *npt)
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{
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const struct rtnl_cmd_handler *cmd;
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struct epoch_tracker et;
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struct nlpcb *nlp = npt->nlp;
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int error = 0;
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if (__predict_false(hdr->nlmsg_type >= HANDLER_MAX_NUM)) {
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NLMSG_REPORT_ERR_MSG(npt, "unknown message type: %d", hdr->nlmsg_type);
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return (ENOTSUP);
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}
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cmd = rtnl_handler[hdr->nlmsg_type];
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if (__predict_false(cmd == NULL)) {
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NLMSG_REPORT_ERR_MSG(npt, "unknown message type: %d", hdr->nlmsg_type);
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return (ENOTSUP);
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}
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NLP_LOG(LOG_DEBUG2, nlp, "received msg %s(%d) len %d", cmd->name,
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hdr->nlmsg_type, hdr->nlmsg_len);
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if (cmd->priv != 0 && !nlp_has_priv(nlp, cmd->priv)) {
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NLP_LOG(LOG_DEBUG2, nlp, "priv %d check failed for msg %s", cmd->priv, cmd->name);
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return (EPERM);
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} else if (cmd->priv != 0)
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NLP_LOG(LOG_DEBUG3, nlp, "priv %d check passed for msg %s", cmd->priv, cmd->name);
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if (!nlp_unconstrained_vnet(nlp) && (cmd->flags & RTNL_F_ALLOW_NONVNET_JAIL) == 0) {
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NLP_LOG(LOG_DEBUG2, nlp, "jail check failed for msg %s", cmd->name);
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return (EPERM);
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}
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bool need_epoch = !(cmd->flags & RTNL_F_NOEPOCH);
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if (need_epoch)
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NET_EPOCH_ENTER(et);
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error = cmd->cb(hdr, nlp, npt);
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if (need_epoch)
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NET_EPOCH_EXIT(et);
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NLP_LOG(LOG_DEBUG3, nlp, "message %s -> error %d", cmd->name, error);
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return (error);
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}
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static struct rtbridge nlbridge = {
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.route_f = rtnl_handle_route_event,
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.ifmsg_f = rtnl_handle_ifnet_event,
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};
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static struct rtbridge *nlbridge_orig_p;
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static void
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rtnl_load(void *u __unused)
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{
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NL_LOG(LOG_DEBUG2, "rtnl loading");
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nlbridge_orig_p = netlink_callback_p;
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netlink_callback_p = &nlbridge;
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rtnl_neighs_init();
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rtnl_ifaces_init();
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rtnl_nexthops_init();
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rtnl_routes_init();
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netlink_register_proto(NETLINK_ROUTE, "NETLINK_ROUTE", rtnl_handle_message);
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}
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SYSINIT(rtnl_load, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rtnl_load, NULL);
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static void
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rtnl_unload(void *u __unused)
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{
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netlink_callback_p = nlbridge_orig_p;
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rtnl_ifaces_destroy();
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rtnl_neighs_destroy();
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/* Wait till all consumers read nlbridge data */
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NET_EPOCH_WAIT();
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}
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SYSUNINIT(rtnl_unload, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rtnl_unload, NULL);
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