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Hide kernel option ROUTETABLES evaluations in the implementation

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rather than the header file.  With this also move RT_MAXFIBS and
RT_NUMFIBS into the implemantion to avoid further usage in other
code. rt_numfibs is all that should be needed.

This allows users to change the number of FIBs from 1..RT_MAXFIBS(16)
dynamically using the tunable without the need to change the kernel
config for the maximum anymore.  This means that thet multi-FIB
feature is now fully available with GENERIC kernels.
The kernel option ROUTETABLES can still be used to set the default
numbers of FIBs in absence of the tunable.

Ok.ed by:	julian, hrs, melifaro
MFC after:	2 weeks
This commit is contained in:
bz 2012-03-18 11:23:40 +00:00
parent fd6aa4b890
commit a45ce69b30
2 changed files with 18 additions and 21 deletions
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18
sys/net/route.c
View File

@ -68,6 +68,24 @@
#include <vm/uma.h>
/* We use 4 bits in the mbuf flags, thus we are limited to 16 FIBS. */
#define RT_MAXFIBS 16
/* Kernel config default option. */
#ifdef ROUTETABLES
#if ROUTETABLES <= 0
#error "ROUTETABLES defined too low"
#endif
#if ROUTETABLES > RT_MAXFIBS
#error "ROUTETABLES defined too big"
#endif
#define RT_NUMFIBS ROUTETABLES
#endif /* ROUTETABLES */
/* Initialize to default if not otherwise set. */
#ifndef RT_NUMFIBS
#define RT_NUMFIBS 1
#endif
u_int rt_numfibs = RT_NUMFIBS;
SYSCTL_UINT(_net, OID_AUTO, fibs, CTLFLAG_RD, &rt_numfibs, 0, "");
/*

21
sys/net/route.h
View File

@ -90,27 +90,6 @@ struct rt_metrics {
#define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
#define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
/* MRT compile-time constants */
#ifdef _KERNEL
#ifndef ROUTETABLES
#define RT_NUMFIBS 1
#define RT_MAXFIBS 1
#else
/* while we use 4 bits in the mbuf flags, we are limited to 16 */
#define RT_MAXFIBS 16
#if ROUTETABLES > RT_MAXFIBS
#define RT_NUMFIBS RT_MAXFIBS
#error "ROUTETABLES defined too big"
#else
#if ROUTETABLES == 0
#define RT_NUMFIBS 1
#else
#define RT_NUMFIBS ROUTETABLES
#endif
#endif
#endif
#endif
#define RT_DEFAULT_FIB 0 /* Explicitly mark fib=0 restricted cases */
extern u_int rt_numfibs; /* number fo usable routing tables */
/*