routing: Add unified level-based logging support for the routing subsystem.
Summary: MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D33664
This commit is contained in:
parent
823a08d740
commit
63f7f3921b
@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$");
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#include <net/if_var.h>
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#include <net/route.h>
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#include <net/route/route_ctl.h>
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#include <net/route/route_debug.h>
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#include <net/vnet.h>
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#include <netinet/if_ether.h>
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#include <netinet6/in6_var.h>
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@ -418,6 +419,67 @@ llentry_lookup_family(struct llentry *lle, int family)
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return (NULL);
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}
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/*
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* Retrieves upper protocol family for the llentry.
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* By default, all "normal" (e.g. upper_family == transport_family)
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* llentries have r_family set to 0.
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* Thus, use @default_family in that regard, otherwise use r_family.
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*
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* Returns upper protocol family
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*/
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int
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llentry_get_upper_family(const struct llentry *lle, int default_family)
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{
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return (lle->r_family == 0 ? default_family : lle->r_family);
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}
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/*
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* Prints llentry @lle data into provided buffer.
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* Example: lle/inet/valid/em0/1.2.3.4
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*
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* Returns @buf.
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*/
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char *
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llentry_print_buf(const struct llentry *lle, struct ifnet *ifp, int family,
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char *buf, size_t bufsize)
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{
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char abuf[INET6_ADDRSTRLEN];
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const char *valid = (lle->r_flags & RLLE_VALID) ? "valid" : "no_l2";
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const char *upper_str = rib_print_family(llentry_get_upper_family(lle, family));
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switch (family) {
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#ifdef INET
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case AF_INET:
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inet_ntop(AF_INET, &lle->r_l3addr.addr4, abuf, sizeof(abuf));
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snprintf(buf, bufsize, "lle/%s/%s/%s/%s", upper_str,
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valid, if_name(ifp), abuf);
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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inet_ntop(AF_INET6, &lle->r_l3addr.addr6, abuf, sizeof(abuf));
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snprintf(buf, bufsize, "lle/%s/%s/%s/%s", upper_str,
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valid, if_name(ifp), abuf);
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break;
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#endif
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default:
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snprintf(buf, bufsize, "lle/%s/%s/%s/????", upper_str,
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valid, if_name(ifp));
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break;
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}
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return (buf);
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}
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char *
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llentry_print_buf_lltable(const struct llentry *lle, char *buf, size_t bufsize)
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{
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struct lltable *tbl = lle->lle_tbl;
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return (llentry_print_buf(lle, lltable_get_ifp(tbl), lltable_get_af(tbl), buf, bufsize));
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}
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/*
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* Requests feedback from the datapath.
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* First packet using @lle should result in
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@ -268,6 +268,7 @@ lla_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr)
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void llentry_request_feedback(struct llentry *lle);
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void llentry_mark_used(struct llentry *lle);
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time_t llentry_get_hittime(struct llentry *lle);
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int llentry_get_upper_family(const struct llentry *lle, int default_family);
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/*
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* Notify the LLE code that the entry was used by datapath.
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@ -448,6 +448,7 @@ void rib_free_info(struct rt_addrinfo *info);
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void rib_flush_routes_family(int family);
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struct nhop_object *rib_lookup(uint32_t fibnum, const struct sockaddr *dst,
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uint32_t flags, uint32_t flowid);
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const char *rib_print_family(int family);
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#endif
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#endif
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@ -52,6 +52,11 @@ __FBSDID("$FreeBSD$");
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#include <net/route/nhop_var.h>
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#include <net/vnet.h>
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#define DEBUG_MOD_NAME nhop_ctl
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#define DEBUG_MAX_LEVEL LOG_DEBUG
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#include <net/route/route_debug.h>
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_DECLARE_DEBUG(LOG_INFO);
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/*
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* This file contains core functionality for the nexthop ("nhop") route subsystem.
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* The business logic needed to create nexhop objects is implemented here.
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@ -91,8 +96,6 @@ static void fill_sdl_from_ifp(struct sockaddr_dl_short *sdl, const struct ifnet
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static void destroy_nhop_epoch(epoch_context_t ctx);
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static void destroy_nhop(struct nhop_priv *nh_priv);
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static void print_nhop(const char *prefix, const struct nhop_object *nh);
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_Static_assert(__offsetof(struct nhop_object, nh_ifp) == 32,
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"nhop_object: wrong nh_ifp offset");
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_Static_assert(sizeof(struct nhop_object) <= 128,
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@ -139,7 +142,7 @@ get_aifp(const struct nhop_object *nh)
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nh->gw_sa.sa_family == AF_LINK) {
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aifp = ifnet_byindex(nh->gwl_sa.sdl_index);
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if (aifp == NULL) {
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DPRINTF("unable to get aifp for %s index %d",
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FIB_NH_LOG(LOG_WARNING, nh, "unable to get aifp for %s index %d",
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if_name(nh->nh_ifp), nh->gwl_sa.sdl_index);
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}
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}
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@ -226,7 +229,7 @@ set_nhop_gw_from_info(struct nhop_object *nh, struct rt_addrinfo *info)
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struct sockaddr_dl *sdl = (struct sockaddr_dl *)gw;
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struct ifnet *ifp = ifnet_byindex(sdl->sdl_index);
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if (ifp == NULL) {
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DPRINTF("invalid ifindex %d", sdl->sdl_index);
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FIB_NH_LOG(LOG_WARNING, nh, "invalid ifindex %d", sdl->sdl_index);
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return (EINVAL);
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}
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fill_sdl_from_ifp(&nh->gwl_sa, ifp);
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@ -244,7 +247,7 @@ set_nhop_gw_from_info(struct nhop_object *nh, struct rt_addrinfo *info)
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* happy.
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*/
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if (gw->sa_len > sizeof(struct sockaddr_in6)) {
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DPRINTF("nhop SA size too big: AF %d len %u",
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FIB_NH_LOG(LOG_WARNING, nh, "nhop SA size too big: AF %d len %u",
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gw->sa_family, gw->sa_len);
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return (ENOMEM);
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}
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@ -525,7 +528,7 @@ reference_nhop_deps(struct nhop_object *nh)
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ifa_free(nh->nh_ifa);
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return (false);
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}
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DPRINTF("AIFP: %p nh_ifp %p", nh->nh_aifp, nh->nh_ifp);
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FIB_NH_LOG(LOG_DEBUG, nh, "AIFP: %p nh_ifp %p", nh->nh_aifp, nh->nh_ifp);
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if (!if_try_ref(nh->nh_ifp)) {
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ifa_free(nh->nh_ifa);
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if_rele(nh->nh_aifp);
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@ -552,7 +555,7 @@ finalize_nhop(struct nh_control *ctl, struct rt_addrinfo *info,
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if (nh->nh_pksent == NULL) {
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uma_zfree(nhops_zone, nh);
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RTSTAT_INC(rts_nh_alloc_failure);
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DPRINTF("nh_alloc_finalize failed");
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FIB_NH_LOG(LOG_WARNING, nh, "counter_u64_alloc() failed");
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return (ENOMEM);
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}
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@ -560,7 +563,7 @@ finalize_nhop(struct nh_control *ctl, struct rt_addrinfo *info,
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counter_u64_free(nh->nh_pksent);
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uma_zfree(nhops_zone, nh);
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RTSTAT_INC(rts_nh_alloc_failure);
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DPRINTF("nh_alloc_finalize failed - reference failure");
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FIB_NH_LOG(LOG_WARNING, nh, "interface reference failed");
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return (EAGAIN);
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}
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@ -574,8 +577,6 @@ finalize_nhop(struct nh_control *ctl, struct rt_addrinfo *info,
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nh_priv->nh_fibnum = ctl->ctl_rh->rib_fibnum;
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print_nhop("FINALIZE", nh);
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if (link_nhop(ctl, nh_priv) == 0) {
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/*
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* Adding nexthop to the datastructures
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@ -583,49 +584,22 @@ finalize_nhop(struct nh_control *ctl, struct rt_addrinfo *info,
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* the epoch end, as nexthop is not used
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* and return.
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*/
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DPRINTF("link_nhop failed!");
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char nhbuf[48];
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FIB_NH_LOG(LOG_WARNING, nh, "failed to link %s",
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nhop_print_buf(nh, nhbuf, sizeof(nhbuf)));
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destroy_nhop(nh_priv);
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return (ENOBUFS);
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}
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#if DEBUG_MAX_LEVEL >= LOG_DEBUG
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char nhbuf[48];
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FIB_NH_LOG(LOG_DEBUG, nh, "finalized: %s", nhop_print_buf(nh, nhbuf, sizeof(nhbuf)));
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#endif
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return (0);
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}
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static void
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print_nhop_sa(char *buf, size_t buflen, const struct sockaddr *sa)
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{
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if (sa->sa_family == AF_INET) {
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const struct sockaddr_in *sin4;
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sin4 = (const struct sockaddr_in *)sa;
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inet_ntop(AF_INET, &sin4->sin_addr, buf, buflen);
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} else if (sa->sa_family == AF_INET6) {
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const struct sockaddr_in6 *sin6;
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sin6 = (const struct sockaddr_in6 *)sa;
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inet_ntop(AF_INET6, &sin6->sin6_addr, buf, buflen);
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} else if (sa->sa_family == AF_LINK) {
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const struct sockaddr_dl *sdl;
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sdl = (const struct sockaddr_dl *)sa;
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snprintf(buf, buflen, "if#%d", sdl->sdl_index);
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} else
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snprintf(buf, buflen, "af:%d", sa->sa_family);
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}
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static void
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print_nhop(const char *prefix, const struct nhop_object *nh)
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{
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char src_buf[INET6_ADDRSTRLEN], addr_buf[INET6_ADDRSTRLEN];
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print_nhop_sa(src_buf, sizeof(src_buf), nh->nh_ifa->ifa_addr);
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print_nhop_sa(addr_buf, sizeof(addr_buf), &nh->gw_sa);
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DPRINTF("%s nhop priv %p: AF %d ifp %p %s addr %s src %p %s aifp %p %s mtu %d nh_flags %X",
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prefix, nh->nh_priv, nh->nh_priv->nh_upper_family, nh->nh_ifp,
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if_name(nh->nh_ifp), addr_buf, nh->nh_ifa, src_buf, nh->nh_aifp,
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if_name(nh->nh_aifp), nh->nh_mtu, nh->nh_flags);
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}
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static void
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destroy_nhop(struct nhop_priv *nh_priv)
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{
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@ -633,8 +607,6 @@ destroy_nhop(struct nhop_priv *nh_priv)
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nh = nh_priv->nh;
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print_nhop("DEL", nh);
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if_rele(nh->nh_ifp);
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if_rele(nh->nh_aifp);
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ifa_free(nh->nh_ifa);
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@ -682,6 +654,11 @@ nhop_free(struct nhop_object *nh)
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if (!refcount_release(&nh_priv->nh_refcnt))
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return;
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#if DEBUG_MAX_LEVEL >= LOG_DEBUG
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char nhbuf[48];
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FIB_NH_LOG(LOG_DEBUG, nh, "deleting %s", nhop_print_buf(nh, nhbuf, sizeof(nhbuf)));
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#endif
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/*
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* There are only 2 places, where nh_linked can be decreased:
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* rib destroy (nhops_destroy_rib) and this function.
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@ -706,7 +683,9 @@ nhop_free(struct nhop_object *nh)
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ctl = nh_priv->nh_control;
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if (unlink_nhop(ctl, nh_priv) == NULL) {
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/* Do not try to reclaim */
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DPRINTF("Failed to unlink nexhop %p", nh_priv);
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char nhbuf[48];
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FIB_NH_LOG(LOG_WARNING, nh, "failed to unlink %s",
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nhop_print_buf(nh, nhbuf, sizeof(nhbuf)));
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NET_EPOCH_EXIT(et);
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return;
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}
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@ -844,6 +823,45 @@ nhops_update_ifmtu(struct rib_head *rh, struct ifnet *ifp, uint32_t mtu)
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}
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/*
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* Prints nexthop @nh data in the provided @buf.
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* Example: nh#33/inet/em0/192.168.0.1
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*/
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char *
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nhop_print_buf(const struct nhop_object *nh, char *buf, size_t bufsize)
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{
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char abuf[INET6_ADDRSTRLEN];
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struct nhop_priv *nh_priv = nh->nh_priv;
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const char *upper_str = rib_print_family(nh->nh_priv->nh_upper_family);
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switch (nh->gw_sa.sa_family) {
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#ifdef INET
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case AF_INET:
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inet_ntop(AF_INET, &nh->gw4_sa.sin_addr, abuf, sizeof(abuf));
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snprintf(buf, bufsize, "nh#%d/%s/%s/%s", nh_priv->nh_idx, upper_str,
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if_name(nh->nh_ifp), abuf);
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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inet_ntop(AF_INET6, &nh->gw6_sa.sin6_addr, abuf, sizeof(abuf));
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snprintf(buf, bufsize, "nh#%d/%s/%s/%s", nh_priv->nh_idx, upper_str,
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if_name(nh->nh_ifp), abuf);
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break;
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#endif
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case AF_LINK:
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snprintf(buf, bufsize, "nh#%d/%s/%s/resolve", nh_priv->nh_idx, upper_str,
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if_name(nh->nh_ifp));
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break;
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default:
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snprintf(buf, bufsize, "nh#%d/%s/%s/????", nh_priv->nh_idx, upper_str,
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if_name(nh->nh_ifp));
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break;
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}
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return (buf);
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}
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/*
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* Dumps a single entry to sysctl buffer.
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*
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@ -866,8 +884,6 @@ dump_nhop_entry(struct rib_head *rh, struct nhop_object *nh, struct sysctl_req *
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size_t addrs_len;
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int error;
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//DPRINTF("Dumping: head %p nh %p flags %X req %p\n", rh, nh, nh->nh_flags, w);
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memset(&arpc, 0, sizeof(arpc));
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arpc.rtm.rtm_msglen = sizeof(arpc);
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@ -949,7 +965,10 @@ nhops_dump_sysctl(struct rib_head *rh, struct sysctl_req *w)
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ctl = rh->nh_control;
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NHOPS_RLOCK(ctl);
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DPRINTF("NHDUMP: count=%u", ctl->nh_head.items_count);
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#if DEBUG_MAX_LEVEL >= LOG_DEBUG
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FIB_LOG(LOG_DEBUG, rh->rib_fibnum, rh->rib_family, "dump %u items",
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ctl->nh_head.items_count);
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#endif
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CHT_SLIST_FOREACH(&ctl->nh_head, nhops, nh_priv) {
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error = dump_nhop_entry(rh, nh_priv->nh, w);
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if (error != 0) {
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@ -118,6 +118,9 @@ SYSCTL_UINT(_net_route, OID_AUTO, ipv6_nexthop, CTLFLAG_RW | CTLFLAG_VNET,
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VNET_DEFINE_STATIC(uma_zone_t, rtzone);
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#define V_rtzone VNET(rtzone)
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/* Debug bits */
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SYSCTL_NODE(_net_route, OID_AUTO, debug, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
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void
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vnet_rtzone_init()
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{
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@ -1430,6 +1433,20 @@ rib_flush_routes_family(int family)
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}
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}
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const char *
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rib_print_family(int family)
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{
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switch (family) {
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case AF_INET:
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return ("inet");
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case AF_INET6:
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return ("inet6");
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case AF_LINK:
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return ("link");
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}
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return ("unknown");
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}
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static void
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rib_notify(struct rib_head *rnh, enum rib_subscription_type type,
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struct rib_cmd_info *rc)
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141
sys/net/route/route_debug.h
Normal file
141
sys/net/route/route_debug.h
Normal file
@ -0,0 +1,141 @@
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/*-
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* Copyright (c) 2021
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* 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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* 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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* $FreeBSD$
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*/
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#ifndef _NET_ROUTE_DEBUG_H_
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#define _NET_ROUTE_DEBUG_H_
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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/* DEBUG logic */
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#if defined(DEBUG_MOD_NAME) && defined(DEBUG_MAX_LEVEL)
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#define DEBUG_VAR_NAME _DEBUG_VAR_NAME(DEBUG_MOD_NAME)
|
||||
#define _DEBUG_VAR_NAME(a) _DEBUG_VAR_NAME_INDIRECT(a)
|
||||
#define _DEBUG_VAR_NAME_INDIRECT(prefix) prefix##_debug_level
|
||||
|
||||
#define DEBUG_PREFIX_NAME _DEBUG_PREFIX_NAME(DEBUG_MOD_NAME)
|
||||
#define _DEBUG_PREFIX_NAME(n) __DEBUG_PREFIX_NAME(n)
|
||||
#define __DEBUG_PREFIX_NAME(n) #n
|
||||
|
||||
#define _DECLARE_DEBUG(_default_level) \
|
||||
SYSCTL_DECL(_net_route_debug); \
|
||||
static int DEBUG_VAR_NAME = _default_level; \
|
||||
SYSCTL_INT(_net_route_debug, OID_AUTO, DEBUG_VAR_NAME, \
|
||||
CTLFLAG_RW | CTLFLAG_RWTUN, \
|
||||
&(DEBUG_VAR_NAME), 0, "debuglevel")
|
||||
|
||||
/* Additional tracing levels not defined by log.h */
|
||||
#ifndef LOG_DEBUG2
|
||||
#define LOG_DEBUG2 8
|
||||
#endif
|
||||
#ifndef LOG_DEBUG3
|
||||
#define LOG_DEBUG3 9
|
||||
#endif
|
||||
|
||||
#define _output printf
|
||||
#define _DEBUG_PASS_MSG(_l) (DEBUG_VAR_NAME >= (_l))
|
||||
|
||||
/*
|
||||
* Logging for events specific for particular family and fib
|
||||
* Example: [nhop_neigh] inet.0 find_lle: nhop nh#4/inet/vtnet0/10.0.0.1: mapped to lle NULL
|
||||
*/
|
||||
#define FIB_LOG(_l, _fib, _fam, _fmt, ...) FIB_LOG_##_l(_l, _fib, _fam, _fmt, ## __VA_ARGS__)
|
||||
#define _FIB_LOG(_l, _fib, _fam, _fmt, ...) if (_DEBUG_PASS_MSG(_l)) { \
|
||||
_output("[" DEBUG_PREFIX_NAME "] %s.%u %s: " _fmt "\n", rib_print_family(_fam), _fib, __func__, ##__VA_ARGS__); \
|
||||
}
|
||||
|
||||
/* Same as FIB_LOG, but uses nhop to get fib and family */
|
||||
#define FIB_NH_LOG(_l, _nh, _fmt, ...) FIB_LOG_##_l(_l, nhop_get_fibnum(_nh), nhop_get_upper_family(_nh), _fmt, ## __VA_ARGS__)
|
||||
|
||||
/*
|
||||
* Generic logging for routing subsystem
|
||||
* Example: [nhop_neigh] nhops_update_neigh: L2 prepend update from lle/inet/valid/vtnet0/10.0.0.157
|
||||
*/
|
||||
#define RT_LOG(_l, _fmt, ...) RT_LOG_##_l(_l, _fmt, ## __VA_ARGS__)
|
||||
#define _RT_LOG(_l, _fmt, ...) if (_DEBUG_PASS_MSG(_l)) { \
|
||||
_output("[" DEBUG_PREFIX_NAME "] %s: " _fmt "\n", __func__, ##__VA_ARGS__); \
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Wrapper logic to avoid compiling high levels of debugging messages for production systems.
|
||||
*/
|
||||
#if DEBUG_MAX_LEVEL>=LOG_DEBUG2
|
||||
#define FIB_LOG_LOG_DEBUG3 _FIB_LOG
|
||||
#define RT_LOG_LOG_DEBUG3 _RT_LOG
|
||||
#else
|
||||
#define FIB_LOG_LOG_DEBUG3(_l, _fib, _fam, _fmt, ...)
|
||||
#define RT_LOG_LOG_DEBUG3(_l, _fmt, ...)
|
||||
#endif
|
||||
#if DEBUG_MAX_LEVEL>=LOG_DEBUG2
|
||||
#define FIB_LOG_LOG_DEBUG2 _FIB_LOG
|
||||
#define RT_LOG_LOG_DEBUG2 _RT_LOG
|
||||
#else
|
||||
#define FIB_LOG_LOG_DEBUG2(_l, _fib, _fam, _fmt, ...)
|
||||
#define RT_LOG_LOG_DEBUG2(_l, _fmt, ...)
|
||||
#endif
|
||||
#if DEBUG_MAX_LEVEL>=LOG_DEBUG
|
||||
#define FIB_LOG_LOG_DEBUG _FIB_LOG
|
||||
#define RT_LOG_LOG_DEBUG _RT_LOG
|
||||
#else
|
||||
#define FIB_LOG_LOG_DEBUG(_l, _fib, _fam, _fmt, ...)
|
||||
#define RT_LOG_LOG_DEBUG(_l, _fmt, ...)
|
||||
#endif
|
||||
#if DEBUG_MAX_LEVEL>=LOG_INFO
|
||||
#define FIB_LOG_LOG_INFO _FIB_LOG
|
||||
#define RT_LOG_LOG_INFO _RT_LOG
|
||||
#else
|
||||
#define FIB_LOG_LOG_INFO(_l, _fib, _fam, _fmt, ...)
|
||||
#define RT_LOG_LOG_INFO(_l, _fmt, ...)
|
||||
#endif
|
||||
#define FIB_LOG_LOG_NOTICE _FIB_LOG
|
||||
#define FIB_LOG_LOG_ERR _FIB_LOG
|
||||
#define FIB_LOG_LOG_WARNING _FIB_LOG
|
||||
#define RT_LOG_LOG_NOTICE _RT_LOG
|
||||
#define RT_LOG_LOG_ERR _RT_LOG
|
||||
#define RT_LOG_LOG_WARNING _RT_LOG
|
||||
|
||||
#endif
|
||||
|
||||
/* Helpers for fancy-printing various objects */
|
||||
struct nhop_object;
|
||||
struct llentry;
|
||||
struct nhop_neigh;
|
||||
|
||||
char *nhop_print_buf(const struct nhop_object *nh, char *buf, size_t bufsize);
|
||||
char *llentry_print_buf(const struct llentry *lle, struct ifnet *ifp, int family, char *buf,
|
||||
size_t bufsize);
|
||||
char *llentry_print_buf_lltable(const struct llentry *lle, char *buf, size_t bufsize);
|
||||
char *neigh_print_buf(const struct nhop_neigh *nn, char *buf, size_t bufsize);
|
||||
|
||||
#endif
|
Loading…
Reference in New Issue
Block a user