/*- * Copyright (c) 2021 * Alexander V. Chernikov * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _NET_ROUTE_DEBUG_H_ #define _NET_ROUTE_DEBUG_H_ #include #include /* DEBUG logic */ #if defined(DEBUG_MOD_NAME) && defined(DEBUG_MAX_LEVEL) #ifndef _DEBUG_SYSCTL_OID #define _DEBUG_SYSCTL_OID _net_route_debug SYSCTL_DECL(_net_route_debug); #endif #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) \ static int DEBUG_VAR_NAME = _default_level; \ SYSCTL_INT(_DEBUG_SYSCTL_OID, 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 /* * Severity usage guidelines: * * LOG_WARNING - subsystem-global errors ("multipath init failed") * * LOG_INFO - subsystem non-transient errors ("Failed to unlink nexhop"). * All logging <= LOG_INFO by default will be written to syslog. * * LOG_DEBUG - subsystem debug. Not-too often events (hash resizes, recoverable failures). * These are compiled in by default on production. Turning it it should NOT notable affect * performance * LOG_DEBUG2 - more debug. Per-item level (nhg,nh,route) debug, up to multiple lines per item. * This is NOT compiled in by default. Turning it on should NOT seriously impact performance * LOG_DEBUG3 - last debug level. Per-item large debug outputs. * This is NOT compiled in by default. All performance bets are off. * */ #define _output printf #define _DEBUG_PASS_MSG(_l) (DEBUG_VAR_NAME >= (_l)) #define IF_DEBUG_LEVEL(_l) if ((DEBUG_MAX_LEVEL >= (_l)) && (__predict_false(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__) /* Same as FIB_LOG, but uses rib_head to get fib and family */ #define FIB_RH_LOG(_l, _rh, _fmt, ...) FIB_LOG_##_l(_l, (_rh)->rib_fibnum, (_rh)->rib_family, _fmt, ## __VA_ARGS__) /* Same as FIB_LOG, but uses nh_control to get fib and family from linked rib */ #define FIB_CTL_LOG(_l, _ctl, _fmt, ...) FIB_LOG_##_l(_l, (_ctl)->ctl_rh->rib_fibnum, (_ctl)->ctl_rh->rib_family, _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, ...) do { \ if (_DEBUG_PASS_MSG(_l)) \ _output("[" DEBUG_PREFIX_NAME "] %s: " _fmt "\n", \ __func__, ##__VA_ARGS__); \ } while (0) /* * Wrapper logic to avoid compiling high levels of debugging messages for production systems. */ #if DEBUG_MAX_LEVEL>=LOG_DEBUG3 #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 nhgrp_object; struct llentry; struct nhop_neigh; struct rtentry; struct ifnet; #define NHOP_PRINT_BUFSIZE 48 char *nhop_print_buf(const struct nhop_object *nh, char *buf, size_t bufsize); char *nhop_print_buf_any(const struct nhop_object *nh, char *buf, size_t bufsize); char *nhgrp_print_buf(const struct nhgrp_object *nhg, 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); char *rt_print_buf(const struct rtentry *rt, char *buf, size_t bufsize); const char *rib_print_cmd(int rib_cmd); #endif