routing: install prefix and loopback routes using new nhop-based KPI.
Construct the desired hexthops directly instead of using the "translation" layer in form of filling rt_addrinfo data. Simplify V_rt_add_addr_allfibs handling by using recently-added rib_copy_route() to propagate the routes to the non-primary address fibs. MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D36166
This commit is contained in:
Alexander V. Chernikov
parent
827622937e
commit
a1b59379db
@ -75,7 +75,13 @@ int rib_change_route(uint32_t fibnum, struct rt_addrinfo *info,
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struct rib_cmd_info *rc);
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int rib_action(uint32_t fibnum, int action, struct rt_addrinfo *info,
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struct rib_cmd_info *rc);
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int rib_handle_ifaddr_info(uint32_t fibnum, int cmd, struct rt_addrinfo *info);
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int rib_add_kernel_px(uint32_t fibnum, struct sockaddr *dst, int plen,
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struct route_nhop_data *rnd, int op_flags);
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int rib_del_kernel_px(uint32_t fibnum, struct sockaddr *dst, int plen,
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rib_filter_f_t *filter_func, void *filter_arg, int op_flags);
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int rib_match_gw(const struct rtentry *rt, const struct nhop_object *nh,
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void *_data);
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int rib_match_gw(const struct rtentry *rt, const struct nhop_object *nh,
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void *gw_sa);
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@ -64,112 +64,103 @@ VNET_DEFINE(u_int, rt_add_addr_allfibs) = 0;
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SYSCTL_UINT(_net, OID_AUTO, add_addr_allfibs, CTLFLAG_RWTUN | CTLFLAG_VNET,
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&VNET_NAME(rt_add_addr_allfibs), 0, "");
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/*
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* Executes routing tables change specified by @cmd and @info for the fib
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* @fibnum. Generates routing message on success.
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* Note: it assumes there is only single route (interface route) for the
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* provided prefix.
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* Returns 0 on success or errno.
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*/
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static int
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rib_handle_ifaddr_one(uint32_t fibnum, int cmd, struct rt_addrinfo *info)
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static void
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report_operation(uint32_t fibnum, struct rib_cmd_info *rc)
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{
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struct rib_cmd_info rc;
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struct nhop_object *nh;
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int error;
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error = rib_action(fibnum, cmd, info, &rc);
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if (error == 0) {
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if (cmd == RTM_ADD)
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nh = nhop_select(rc.rc_nh_new, 0);
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else
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nh = nhop_select(rc.rc_nh_old, 0);
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rt_routemsg(cmd, rc.rc_rt, nh, fibnum);
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if (rc->rc_cmd == RTM_DELETE)
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nh = nhop_select(rc->rc_nh_old, 0);
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else
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nh = nhop_select(rc->rc_nh_new, 0);
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rt_routemsg(rc->rc_cmd, rc->rc_rt, nh, fibnum);
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}
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int
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rib_add_kernel_px(uint32_t fibnum, struct sockaddr *dst, int plen,
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struct route_nhop_data *rnd, int op_flags)
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{
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struct rib_cmd_info rc = {};
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NET_EPOCH_ASSERT();
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int error = rib_add_route_px(fibnum, dst, plen, rnd, op_flags, &rc);
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if (error != 0)
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return (error);
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report_operation(fibnum, &rc);
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if (V_rt_add_addr_allfibs != 0) {
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for (int i = 0; i < V_rt_numfibs; i++) {
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if (i == fibnum)
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continue;
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struct rib_head *rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
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/* Don't care much about the errors in non-primary fib */
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if (rnh != NULL) {
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if (rib_copy_route(rc.rc_rt, rnd, rnh, &rc) == 0)
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report_operation(i, &rc);
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}
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}
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}
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return (error);
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}
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/*
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* Adds/deletes interface prefix specified by @info to the routing table.
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* If V_rt_add_addr_allfibs is set, iterates over all existing routing
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* tables, otherwise uses fib in @fibnum. Generates routing message for
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* each table.
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* Returns 0 on success or errno.
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*/
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int
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rib_handle_ifaddr_info(uint32_t fibnum, int cmd, struct rt_addrinfo *info)
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rib_del_kernel_px(uint32_t fibnum, struct sockaddr *dst, int plen,
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rib_filter_f_t *filter_func, void *filter_arg, int op_flags)
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{
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int error = 0, last_error = 0;
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bool didwork = false;
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struct rib_cmd_info rc = {};
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if (V_rt_add_addr_allfibs == 0) {
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error = rib_handle_ifaddr_one(fibnum, cmd, info);
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didwork = (error == 0);
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} else {
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for (fibnum = 0; fibnum < V_rt_numfibs; fibnum++) {
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error = rib_handle_ifaddr_one(fibnum, cmd, info);
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if (error == 0)
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didwork = true;
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else
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last_error = error;
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NET_EPOCH_ASSERT();
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int error = rib_del_route_px(fibnum, dst, plen, filter_func, filter_arg,
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op_flags, &rc);
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if (error != 0)
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return (error);
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report_operation(fibnum, &rc);
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if (V_rt_add_addr_allfibs != 0) {
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for (int i = 0; i < V_rt_numfibs; i++) {
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if (i == fibnum)
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continue;
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/* Don't care much about the errors in non-primary fib */
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if (rib_del_route_px(fibnum, dst, plen, filter_func, filter_arg,
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op_flags, &rc) == 0)
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report_operation(i, &rc);
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}
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}
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if (cmd == RTM_DELETE) {
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if (didwork) {
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error = 0;
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} else {
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/* we only give an error if it wasn't in any table */
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error = ((info->rti_flags & RTF_HOST) ?
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EHOSTUNREACH : ENETUNREACH);
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}
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} else {
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if (last_error != 0) {
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/* return an error if any of them failed */
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error = last_error;
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}
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}
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return (error);
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}
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static int
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ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
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struct sockaddr *ia)
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add_loopback_route_flags(struct ifaddr *ifa, struct sockaddr *ia, int op_flags)
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{
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struct rib_cmd_info rc;
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struct epoch_tracker et;
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int error;
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struct rt_addrinfo info;
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struct sockaddr_dl null_sdl;
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struct ifnet *ifp;
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ifp = ifa->ifa_ifp;
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NET_EPOCH_ASSERT();
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NET_EPOCH_ENTER(et);
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bzero(&info, sizeof(info));
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if (cmd != RTM_DELETE)
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info.rti_ifp = V_loif;
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if (cmd == RTM_ADD) {
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/* explicitly specify (loopback) ifa */
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if (info.rti_ifp != NULL)
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info.rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
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}
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info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
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info.rti_info[RTAX_DST] = ia;
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info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
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link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
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struct ifnet *ifp = ifa->ifa_ifp;
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struct nhop_object *nh = nhop_alloc(ifp->if_fib, ia->sa_family);
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struct route_nhop_data rnd = { .rnd_weight = RT_DEFAULT_WEIGHT };
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if (nh == NULL)
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return (ENOMEM);
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error = rib_action(ifp->if_fib, cmd, &info, &rc);
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NET_EPOCH_EXIT(et);
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if (error == 0 ||
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(cmd == RTM_ADD && error == EEXIST) ||
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(cmd == RTM_DELETE && (error == ENOENT || error == ESRCH)))
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nhop_set_direct_gw(nh, ifp);
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nhop_set_transmit_ifp(nh, V_loif);
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nhop_set_src(nh, ifaof_ifpforaddr(ifa->ifa_addr, ifp));
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nhop_set_pinned(nh, true);
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nhop_set_rtflags(nh, RTF_STATIC);
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nhop_set_pxtype_flag(nh, NHF_HOST);
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rnd.rnd_nhop = nhop_get_nhop(nh, &error);
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if (error != 0)
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return (error);
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error = rib_add_route_px(ifp->if_fib, ia, -1, &rnd, op_flags, &rc);
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log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
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__func__, otype, if_name(ifp), error);
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if (error != 0)
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log(LOG_DEBUG, "%s: failed to update interface %s route: %u\n",
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__func__, if_name(ifp), error);
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return (error);
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}
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@ -177,22 +168,49 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
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int
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ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
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{
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struct epoch_tracker et;
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return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
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}
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NET_EPOCH_ENTER(et);
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int error = add_loopback_route_flags(ifa, ia, RTM_F_CREATE | RTM_F_FORCE);
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NET_EPOCH_EXIT(et);
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int
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ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
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{
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return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
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return (error);
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}
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int
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ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
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{
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struct epoch_tracker et;
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return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
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NET_EPOCH_ENTER(et);
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int error = add_loopback_route_flags(ifa, ia, RTM_F_REPLACE | RTM_F_FORCE);
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NET_EPOCH_EXIT(et);
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return (error);
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}
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int
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ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
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{
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struct ifnet *ifp = ifa->ifa_ifp;
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struct sockaddr_dl link_sdl;
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struct sockaddr *gw = (struct sockaddr *)&link_sdl;
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struct rib_cmd_info rc;
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struct epoch_tracker et;
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int error;
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NET_EPOCH_ENTER(et);
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link_init_sdl(ifp, gw, ifp->if_type);
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error = rib_del_route_px_gw(ifp->if_fib, ia, -1, gw, RTM_F_FORCE, &rc);
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NET_EPOCH_EXIT(et);
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if (error != 0)
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log(LOG_DEBUG, "%s: failed to delete interface %s route: %u\n",
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__func__, if_name(ifp), error);
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return (error);
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}
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static bool
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@ -821,36 +821,34 @@ in_match_ifaddr(const struct rtentry *rt, const struct nhop_object *nh, void *ar
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}
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static int
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in_handle_prefix_route(uint32_t fibnum, int cmd,
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struct sockaddr_in *dst, struct sockaddr_in *netmask, struct ifaddr *ifa,
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struct ifnet *ifp)
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in_handle_prefix_route(uint32_t fibnum, int cmd, struct sockaddr *dst,
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int plen, struct ifaddr *ifa, struct ifnet *ifp)
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{
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int error = 0;
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NET_EPOCH_ASSERT();
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/* Prepare gateway */
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struct sockaddr_dl_short sdl = {
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.sdl_family = AF_LINK,
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.sdl_len = sizeof(struct sockaddr_dl_short),
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.sdl_type = ifa->ifa_ifp->if_type,
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.sdl_index = ifa->ifa_ifp->if_index,
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};
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if (cmd == RTM_DELETE) {
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error = rib_del_kernel_px(fibnum, dst, plen, in_match_ifaddr, ifa,
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RTM_F_FORCE);
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} else {
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struct nhop_object *nh = nhop_alloc(fibnum, dst->sa_family);
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struct route_nhop_data rnd = { .rnd_weight = RT_DEFAULT_WEIGHT };
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struct rt_addrinfo info = {
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.rti_ifa = ifa,
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.rti_ifp = ifp,
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.rti_flags = RTF_PINNED | ((netmask != NULL) ? 0 : RTF_HOST),
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.rti_info = {
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[RTAX_DST] = (struct sockaddr *)dst,
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[RTAX_NETMASK] = (struct sockaddr *)netmask,
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[RTAX_GATEWAY] = (struct sockaddr *)&sdl,
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},
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/* Ensure we delete the prefix IFF prefix ifa matches */
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.rti_filter = in_match_ifaddr,
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.rti_filterdata = ifa,
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};
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return (rib_handle_ifaddr_info(fibnum, cmd, &info));
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if (nh == NULL)
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return (ENOMEM);
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nhop_set_direct_gw(nh, ifa->ifa_ifp);
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nhop_set_transmit_ifp(nh, ifp);
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nhop_set_src(nh, ifa);
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nhop_set_pinned(nh, true);
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nhop_set_pxtype_flag(nh, plen == 32 ? NHF_HOST : 0);
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rnd.rnd_nhop = nhop_get_nhop(nh, &error);
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if (error != 0)
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return (error);
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int op_flags = RTM_F_CREATE | RTM_F_REPLACE | RTM_F_FORCE;
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error = rib_add_kernel_px(fibnum, dst, plen, &rnd, op_flags);
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}
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return (error);
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}
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/*
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@ -959,19 +957,12 @@ in_handle_ifaddr_route(int cmd, struct in_ifaddr *ia)
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{
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struct ifaddr *ifa = &ia->ia_ifa;
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struct in_addr daddr, maddr;
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struct sockaddr_in *pmask;
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struct epoch_tracker et;
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int error;
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ia_getrtprefix(ia, &daddr, &maddr);
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struct sockaddr_in mask = {
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.sin_family = AF_INET,
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.sin_len = sizeof(struct sockaddr_in),
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.sin_addr = maddr,
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};
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pmask = (maddr.s_addr != INADDR_BROADCAST) ? &mask : NULL;
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int plen = bitcount32(maddr.s_addr);
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struct sockaddr_in dst = {
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.sin_family = AF_INET,
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@ -989,7 +980,8 @@ in_handle_ifaddr_route(int cmd, struct in_ifaddr *ia)
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uint32_t fibnum = ifa->ifa_ifp->if_fib;
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NET_EPOCH_ENTER(et);
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error = in_handle_prefix_route(fibnum, cmd, &dst, pmask, ifa, ifp);
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error = in_handle_prefix_route(fibnum, cmd, (struct sockaddr *)&dst,
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plen, ifa, ifp);
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NET_EPOCH_EXIT(et);
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return (error);
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@ -1267,6 +1267,29 @@ in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
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return (error);
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}
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static int
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in6_handle_dstaddr_rtadd(uint32_t fibnum, struct sockaddr *dst, struct ifaddr *ifa)
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{
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struct nhop_object *nh = nhop_alloc(fibnum, dst->sa_family);
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struct route_nhop_data rnd = { .rnd_weight = RT_DEFAULT_WEIGHT };
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int error = 0;
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if (nh == NULL)
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return (ENOMEM);
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nhop_set_direct_gw(nh, ifa->ifa_ifp);
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nhop_set_transmit_ifp(nh, ifa->ifa_ifp);
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nhop_set_src(nh, ifa);
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nhop_set_pinned(nh, true);
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nhop_set_pxtype_flag(nh, NHF_HOST);
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rnd.rnd_nhop = nhop_get_nhop(nh, &error);
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if (error == 0) {
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int op_flags = RTM_F_CREATE | RTM_F_REPLACE | RTM_F_FORCE;
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error = rib_add_kernel_px(fibnum, dst, -1, &rnd, op_flags);
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}
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return (error);
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}
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/*
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* Adds or deletes interface route for p2p ifa.
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* Returns 0 on success or errno.
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@ -1276,35 +1299,26 @@ in6_handle_dstaddr_rtrequest(int cmd, struct in6_ifaddr *ia)
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{
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struct epoch_tracker et;
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struct ifaddr *ifa = &ia->ia_ifa;
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uint32_t fibnum = ifa->ifa_ifp->if_fib;
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int error;
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/* Prepare gateway */
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struct sockaddr_dl_short sdl = {
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.sdl_family = AF_LINK,
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.sdl_len = sizeof(struct sockaddr_dl_short),
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.sdl_type = ifa->ifa_ifp->if_type,
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.sdl_index = ifa->ifa_ifp->if_index,
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};
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struct sockaddr_in6 dst = {
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.sin6_family = AF_INET6,
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.sin6_len = sizeof(struct sockaddr_in6),
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.sin6_addr = ia->ia_dstaddr.sin6_addr,
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};
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struct rt_addrinfo info = {
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.rti_ifa = ifa,
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.rti_ifp = ifa->ifa_ifp,
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.rti_flags = RTF_PINNED | RTF_HOST,
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.rti_info = {
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[RTAX_DST] = (struct sockaddr *)&dst,
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[RTAX_GATEWAY] = (struct sockaddr *)&sdl,
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},
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};
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/* Don't set additional per-gw filters on removal */
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NET_EPOCH_ENTER(et);
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error = rib_handle_ifaddr_info(ifa->ifa_ifp->if_fib, cmd, &info);
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if (cmd == RTM_DELETE) {
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struct sockaddr_dl link_sdl;
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struct sockaddr *gw = (struct sockaddr *)&link_sdl;
|
||||
struct ifnet *ifp = ifa->ifa_ifp;
|
||||
|
||||
link_init_sdl(ifp, gw, ifp->if_type);
|
||||
error = rib_del_kernel_px(fibnum, (struct sockaddr *)&dst, 128,
|
||||
rib_match_gw, gw, RTM_F_FORCE);
|
||||
} else
|
||||
error = in6_handle_dstaddr_rtadd(fibnum, (struct sockaddr *)&dst, ifa);
|
||||
NET_EPOCH_EXIT(et);
|
||||
|
||||
return (error);
|
||||
|
||||
@ -2014,41 +2014,55 @@ pfxlist_onlink_check(void)
|
||||
ND6_ONLINK_UNLOCK();
|
||||
}
|
||||
|
||||
static int
|
||||
nd6_prefix_rtadd(uint32_t fibnum, struct sockaddr *dst, int plen,
|
||||
struct ifnet *ifp, struct ifaddr *ifa)
|
||||
{
|
||||
struct route_nhop_data rnd = { .rnd_weight = RT_DEFAULT_WEIGHT };
|
||||
int error = 0;
|
||||
|
||||
struct nhop_object *nh = nhop_alloc(fibnum, dst->sa_family);
|
||||
if (nh == NULL)
|
||||
return (ENOMEM);
|
||||
nhop_set_direct_gw(nh, ifp);
|
||||
nhop_set_transmit_ifp(nh, ifp);
|
||||
nhop_set_src(nh, ifa);
|
||||
nhop_set_pinned(nh, true);
|
||||
nhop_set_pxtype_flag(nh, plen == 128 ? NHF_HOST : 0);
|
||||
rnd.rnd_nhop = nhop_get_nhop(nh, &error);
|
||||
if (error == 0) {
|
||||
int op_flags = RTM_F_CREATE | RTM_F_REPLACE | RTM_F_FORCE;
|
||||
error = rib_add_kernel_px(fibnum, dst, plen, &rnd, op_flags);
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* Add or remove interface route specified by @dst, @netmask and @ifp.
|
||||
* ifa can be NULL.
|
||||
* Returns 0 on success
|
||||
*/
|
||||
static int
|
||||
nd6_prefix_rtrequest(uint32_t fibnum, int cmd, struct sockaddr_in6 *dst,
|
||||
struct sockaddr_in6 *netmask, struct ifnet *ifp, struct ifaddr *ifa)
|
||||
nd6_prefix_rtrequest(uint32_t fibnum, int cmd, struct sockaddr *dst,
|
||||
int plen, struct ifnet *ifp, struct ifaddr *ifa)
|
||||
{
|
||||
struct epoch_tracker et;
|
||||
int error;
|
||||
|
||||
/* Prepare gateway */
|
||||
struct sockaddr_dl_short sdl = {
|
||||
.sdl_family = AF_LINK,
|
||||
.sdl_len = sizeof(struct sockaddr_dl_short),
|
||||
.sdl_type = ifp->if_type,
|
||||
.sdl_index = ifp->if_index,
|
||||
};
|
||||
|
||||
struct rt_addrinfo info = {
|
||||
.rti_ifa = ifa,
|
||||
.rti_ifp = ifp,
|
||||
.rti_flags = RTF_PINNED | ((netmask != NULL) ? 0 : RTF_HOST),
|
||||
.rti_info = {
|
||||
[RTAX_DST] = (struct sockaddr *)dst,
|
||||
[RTAX_NETMASK] = (struct sockaddr *)netmask,
|
||||
[RTAX_GATEWAY] = (struct sockaddr *)&sdl,
|
||||
},
|
||||
};
|
||||
/* Don't set additional per-gw filters on removal */
|
||||
|
||||
NET_EPOCH_ENTER(et);
|
||||
error = rib_handle_ifaddr_info(fibnum, cmd, &info);
|
||||
if (cmd == RTM_DELETE) {
|
||||
struct sockaddr_dl link_sdl;
|
||||
struct sockaddr *gw = (struct sockaddr *)&link_sdl;
|
||||
|
||||
link_init_sdl(ifp, gw, ifp->if_type);
|
||||
error = rib_del_kernel_px(fibnum, dst, plen,
|
||||
rib_match_gw, gw, RTM_F_FORCE);
|
||||
} else
|
||||
error = nd6_prefix_rtadd(fibnum, dst, plen, ifp, ifa);
|
||||
|
||||
NET_EPOCH_EXIT(et);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
@ -2057,15 +2071,8 @@ nd6_prefix_onlink_rtrequest(struct nd_prefix *pr, struct ifaddr *ifa)
|
||||
{
|
||||
int error;
|
||||
|
||||
struct sockaddr_in6 mask6 = {
|
||||
.sin6_family = AF_INET6,
|
||||
.sin6_len = sizeof(struct sockaddr_in6),
|
||||
.sin6_addr = pr->ndpr_mask,
|
||||
};
|
||||
struct sockaddr_in6 *pmask6 = (pr->ndpr_plen != 128) ? &mask6 : NULL;
|
||||
|
||||
error = nd6_prefix_rtrequest(pr->ndpr_ifp->if_fib, RTM_ADD,
|
||||
&pr->ndpr_prefix, pmask6, pr->ndpr_ifp, ifa);
|
||||
(struct sockaddr *)&pr->ndpr_prefix, pr->ndpr_plen, pr->ndpr_ifp, ifa);
|
||||
if (error == 0)
|
||||
pr->ndpr_stateflags |= NDPRF_ONLINK;
|
||||
|
||||
@ -2176,10 +2183,9 @@ nd6_prefix_offlink(struct nd_prefix *pr)
|
||||
.sin6_len = sizeof(struct sockaddr_in6),
|
||||
.sin6_addr = pr->ndpr_mask,
|
||||
};
|
||||
struct sockaddr_in6 *pmask6 = (pr->ndpr_plen != 128) ? &mask6 : NULL;
|
||||
|
||||
error = nd6_prefix_rtrequest(ifp->if_fib, RTM_DELETE,
|
||||
&pr->ndpr_prefix, pmask6, ifp, NULL);
|
||||
(struct sockaddr *)&pr->ndpr_prefix, pr->ndpr_plen, ifp, NULL);
|
||||
|
||||
a_failure = 1;
|
||||
if (error == 0) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user