Move all ifaddr route creation business logic to net/route/route_ifaddr.c
Differential Revision: https://reviews.freebsd.org/D26318
This commit is contained in:
Alexander V. Chernikov
parent
8ec6c4a38b
commit
bad6b23606
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=367484
@ -4174,6 +4174,7 @@ net/route/nhop_utils.c standard
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net/route/route_ctl.c standard
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net/route/route_ddb.c optional ddb
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net/route/route_helpers.c standard
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net/route/route_ifaddrs.c standard
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net/route/route_tables.c standard
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net/route/route_temporal.c standard
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net/rss_config.c optional inet rss | inet6 rss
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70
sys/net/if.c
70
sys/net/if.c
@ -1842,76 +1842,6 @@ ifa_free(struct ifaddr *ifa)
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NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
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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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{
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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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struct ifaddr *rti_ifa = NULL;
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ifp = ifa->ifa_ifp;
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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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rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
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if (rti_ifa != NULL)
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ifa_ref(rti_ifa);
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info.rti_ifa = rti_ifa;
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}
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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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error = rib_action(ifp->if_fib, cmd, &info, &rc);
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NET_EPOCH_EXIT(et);
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if (rti_ifa != NULL)
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ifa_free(rti_ifa);
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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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return (error);
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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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return (error);
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}
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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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return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
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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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return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
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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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return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
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}
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/*
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* XXX: Because sockaddr_dl has deeper structure than the sockaddr
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* structs used to represent other address families, it is necessary
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204
sys/net/route.c
204
sys/net/route.c
@ -72,20 +72,6 @@
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#include <netinet/in.h>
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#include <netinet/ip_mroute.h>
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/*
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* By default add routes to all fibs for new interfaces.
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* Once this is set to 0 then only allocate routes on interface
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* changes for the FIB of the caller when adding a new set of addresses
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* to an interface. XXX this is a shotgun aproach to a problem that needs
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* a more fine grained solution.. that will come.
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* XXX also has the problems getting the FIB from curthread which will not
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* always work given the fib can be overridden and prefixes can be added
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* from the network stack context.
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*/
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VNET_DEFINE(u_int, rt_add_addr_allfibs) = 1;
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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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VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat);
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VNET_PCPUSTAT_SYSINIT(rtstat);
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@ -866,196 +852,6 @@ rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netma
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bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2));
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}
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/*
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* Set up a routing table entry, normally
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* for an interface.
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*/
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static inline int
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rtinit1(struct ifaddr *ifa, int cmd, int flags, int fibnum)
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{
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RIB_RLOCK_TRACKER;
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struct epoch_tracker et;
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struct sockaddr *dst;
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struct sockaddr *netmask;
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struct rib_cmd_info rc;
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struct rt_addrinfo info;
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int error = 0;
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int startfib, endfib;
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struct sockaddr_storage ss;
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int didwork = 0;
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int a_failure = 0;
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struct sockaddr_dl_short sdl;
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struct rib_head *rnh;
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if (flags & RTF_HOST) {
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dst = ifa->ifa_dstaddr;
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netmask = NULL;
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} else {
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dst = ifa->ifa_addr;
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netmask = ifa->ifa_netmask;
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}
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if (dst->sa_len == 0)
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return(EINVAL);
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switch (dst->sa_family) {
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case AF_INET6:
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case AF_INET:
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/* We support multiple FIBs. */
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break;
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default:
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fibnum = RT_DEFAULT_FIB;
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break;
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}
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if (fibnum == RT_ALL_FIBS) {
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if (V_rt_add_addr_allfibs == 0 && cmd == (int)RTM_ADD)
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startfib = endfib = ifa->ifa_ifp->if_fib;
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else {
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startfib = 0;
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endfib = rt_numfibs - 1;
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}
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} else {
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KASSERT((fibnum < rt_numfibs), ("rtinit1: bad fibnum"));
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startfib = fibnum;
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endfib = fibnum;
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}
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/*
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* If it's a delete, check that if it exists,
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* it's on the correct interface or we might scrub
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* a route to another ifa which would
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* be confusing at best and possibly worse.
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*/
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if (cmd == RTM_DELETE) {
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/*
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* It's a delete, so it should already exist..
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* If it's a net, mask off the host bits
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* (Assuming we have a mask)
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* XXX this is kinda inet specific..
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*/
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if (netmask != NULL) {
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rt_maskedcopy(dst, (struct sockaddr *)&ss, netmask);
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dst = (struct sockaddr *)&ss;
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}
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}
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bzero(&sdl, sizeof(struct sockaddr_dl_short));
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sdl.sdl_family = AF_LINK;
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sdl.sdl_len = sizeof(struct sockaddr_dl_short);
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sdl.sdl_type = ifa->ifa_ifp->if_type;
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sdl.sdl_index = ifa->ifa_ifp->if_index;
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/*
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* Now go through all the requested tables (fibs) and do the
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* requested action. Realistically, this will either be fib 0
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* for protocols that don't do multiple tables or all the
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* tables for those that do.
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*/
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for ( fibnum = startfib; fibnum <= endfib; fibnum++) {
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if (cmd == RTM_DELETE) {
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struct radix_node *rn;
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/*
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* Look up an rtentry that is in the routing tree and
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* contains the correct info.
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*/
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rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
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if (rnh == NULL)
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/* this table doesn't exist but others might */
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continue;
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RIB_RLOCK(rnh);
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rn = rnh->rnh_lookup(dst, netmask, &rnh->head);
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#ifdef RADIX_MPATH
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if (rt_mpath_capable(rnh)) {
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if (rn == NULL)
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error = ESRCH;
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else {
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struct rtentry *rt = RNTORT(rn);
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/*
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* for interface route the gateway
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* gateway is sockaddr_dl, so
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* rt_mpath_matchgate must use the
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* interface address
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*/
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rt = rt_mpath_matchgate(rt,
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ifa->ifa_addr);
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if (rt == NULL)
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error = ESRCH;
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}
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}
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#endif
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error = (rn == NULL ||
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(rn->rn_flags & RNF_ROOT) ||
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RNTORT(rn)->rt_nhop->nh_ifa != ifa);
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RIB_RUNLOCK(rnh);
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if (error) {
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/* this is only an error if bad on ALL tables */
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continue;
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}
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}
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/*
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* Do the actual request
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*/
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bzero((caddr_t)&info, sizeof(info));
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info.rti_ifa = ifa;
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info.rti_flags = flags |
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(ifa->ifa_flags & ~IFA_RTSELF) | RTF_PINNED;
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info.rti_info[RTAX_DST] = dst;
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info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&sdl;
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info.rti_info[RTAX_NETMASK] = netmask;
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NET_EPOCH_ENTER(et);
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error = rib_action(fibnum, cmd, &info, &rc);
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if (error == 0 && rc.rc_rt != NULL) {
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/*
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* notify any listening routing agents of the change
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*/
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/* TODO: interface routes/aliases */
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rt_newaddrmsg_fib(cmd, ifa, rc.rc_rt, fibnum);
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didwork = 1;
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}
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NET_EPOCH_EXIT(et);
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if (error)
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a_failure = error;
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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 = ((flags & RTF_HOST) ?
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EHOSTUNREACH : ENETUNREACH);
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}
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} else {
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if (a_failure) {
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/* return an error if any of them failed */
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error = a_failure;
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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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* Set up a routing table entry, normally
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* for an interface.
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*/
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int
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rtinit(struct ifaddr *ifa, int cmd, int flags)
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{
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struct sockaddr *dst;
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int fib = RT_DEFAULT_FIB;
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if (flags & RTF_HOST) {
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dst = ifa->ifa_dstaddr;
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} else {
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dst = ifa->ifa_addr;
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}
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switch (dst->sa_family) {
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case AF_INET6:
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case AF_INET:
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/* We do support multiple FIBs. */
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fib = RT_ALL_FIBS;
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break;
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}
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return (rtinit1(ifa, cmd, flags, fib));
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}
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/*
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* Announce interface address arrival/withdraw
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* Returns 0 on success.
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