3120b9d428
- make radix node head lock not recursive - fix LOR in rtexpunge - fix LOR in rtredirect Reviewed by: sam
176 lines
6.6 KiB
C
176 lines
6.6 KiB
C
/*-
|
|
* Copyright (c) 1988, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 4. 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.
|
|
*
|
|
* @(#)radix.h 8.2 (Berkeley) 10/31/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _RADIX_H_
|
|
#define _RADIX_H_
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/_lock.h>
|
|
#include <sys/_mutex.h>
|
|
#include <sys/_rwlock.h>
|
|
#endif
|
|
|
|
#ifdef MALLOC_DECLARE
|
|
MALLOC_DECLARE(M_RTABLE);
|
|
#endif
|
|
|
|
/*
|
|
* Radix search tree node layout.
|
|
*/
|
|
|
|
struct radix_node {
|
|
struct radix_mask *rn_mklist; /* list of masks contained in subtree */
|
|
struct radix_node *rn_parent; /* parent */
|
|
short rn_bit; /* bit offset; -1-index(netmask) */
|
|
char rn_bmask; /* node: mask for bit test*/
|
|
u_char rn_flags; /* enumerated next */
|
|
#define RNF_NORMAL 1 /* leaf contains normal route */
|
|
#define RNF_ROOT 2 /* leaf is root leaf for tree */
|
|
#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */
|
|
union {
|
|
struct { /* leaf only data: */
|
|
caddr_t rn_Key; /* object of search */
|
|
caddr_t rn_Mask; /* netmask, if present */
|
|
struct radix_node *rn_Dupedkey;
|
|
} rn_leaf;
|
|
struct { /* node only data: */
|
|
int rn_Off; /* where to start compare */
|
|
struct radix_node *rn_L;/* progeny */
|
|
struct radix_node *rn_R;/* progeny */
|
|
} rn_node;
|
|
} rn_u;
|
|
#ifdef RN_DEBUG
|
|
int rn_info;
|
|
struct radix_node *rn_twin;
|
|
struct radix_node *rn_ybro;
|
|
#endif
|
|
};
|
|
|
|
#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
|
|
#define rn_key rn_u.rn_leaf.rn_Key
|
|
#define rn_mask rn_u.rn_leaf.rn_Mask
|
|
#define rn_offset rn_u.rn_node.rn_Off
|
|
#define rn_left rn_u.rn_node.rn_L
|
|
#define rn_right rn_u.rn_node.rn_R
|
|
|
|
/*
|
|
* Annotations to tree concerning potential routes applying to subtrees.
|
|
*/
|
|
|
|
struct radix_mask {
|
|
short rm_bit; /* bit offset; -1-index(netmask) */
|
|
char rm_unused; /* cf. rn_bmask */
|
|
u_char rm_flags; /* cf. rn_flags */
|
|
struct radix_mask *rm_mklist; /* more masks to try */
|
|
union {
|
|
caddr_t rmu_mask; /* the mask */
|
|
struct radix_node *rmu_leaf; /* for normal routes */
|
|
} rm_rmu;
|
|
int rm_refs; /* # of references to this struct */
|
|
};
|
|
|
|
#define rm_mask rm_rmu.rmu_mask
|
|
#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */
|
|
|
|
typedef int walktree_f_t(struct radix_node *, void *);
|
|
|
|
struct radix_node_head {
|
|
struct radix_node *rnh_treetop;
|
|
int rnh_addrsize; /* permit, but not require fixed keys */
|
|
int rnh_pktsize; /* permit, but not require fixed keys */
|
|
struct radix_node *(*rnh_addaddr) /* add based on sockaddr */
|
|
(void *v, void *mask,
|
|
struct radix_node_head *head, struct radix_node nodes[]);
|
|
struct radix_node *(*rnh_addpkt) /* add based on packet hdr */
|
|
(void *v, void *mask,
|
|
struct radix_node_head *head, struct radix_node nodes[]);
|
|
struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */
|
|
(void *v, void *mask, struct radix_node_head *head);
|
|
struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */
|
|
(void *v, void *mask, struct radix_node_head *head);
|
|
struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */
|
|
(void *v, struct radix_node_head *head);
|
|
struct radix_node *(*rnh_lookup) /* locate based on sockaddr */
|
|
(void *v, void *mask, struct radix_node_head *head);
|
|
struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */
|
|
(void *v, struct radix_node_head *head);
|
|
int (*rnh_walktree) /* traverse tree */
|
|
(struct radix_node_head *head, walktree_f_t *f, void *w);
|
|
int (*rnh_walktree_from) /* traverse tree below a */
|
|
(struct radix_node_head *head, void *a, void *m,
|
|
walktree_f_t *f, void *w);
|
|
void (*rnh_close) /* do something when the last ref drops */
|
|
(struct radix_node *rn, struct radix_node_head *head);
|
|
struct radix_node rnh_nodes[3]; /* empty tree for common case */
|
|
int rnh_multipath; /* multipath capable ? */
|
|
#ifdef _KERNEL
|
|
struct rwlock rnh_lock; /* locks entire radix tree */
|
|
#endif
|
|
};
|
|
|
|
#ifndef _KERNEL
|
|
#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n)))
|
|
#define R_Zalloc(p, t, n) (p = (t) calloc(1,(unsigned int)(n)))
|
|
#define Free(p) free((char *)p);
|
|
#else
|
|
#define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT))
|
|
#define R_Zalloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT | M_ZERO))
|
|
#define Free(p) free((caddr_t)p, M_RTABLE);
|
|
|
|
#define RADIX_NODE_HEAD_LOCK_INIT(rnh) \
|
|
rw_init_flags(&(rnh)->rnh_lock, "radix node head", 0)
|
|
#define RADIX_NODE_HEAD_LOCK(rnh) rw_wlock(&(rnh)->rnh_lock)
|
|
#define RADIX_NODE_HEAD_UNLOCK(rnh) rw_wunlock(&(rnh)->rnh_lock)
|
|
#define RADIX_NODE_HEAD_RLOCK(rnh) rw_rlock(&(rnh)->rnh_lock)
|
|
#define RADIX_NODE_HEAD_RUNLOCK(rnh) rw_runlock(&(rnh)->rnh_lock)
|
|
#define RADIX_NODE_HEAD_LOCK_TRY_UPGRADE(rnh) rw_try_upgrade(&(rnh)->rnh_lock)
|
|
|
|
|
|
#define RADIX_NODE_HEAD_DESTROY(rnh) rw_destroy(&(rnh)->rnh_lock)
|
|
#define RADIX_NODE_HEAD_LOCK_ASSERT(rnh) rw_assert(&(rnh)->rnh_lock, RA_LOCKED)
|
|
#define RADIX_NODE_HEAD_WLOCK_ASSERT(rnh) rw_assert(&(rnh)->rnh_lock, RA_WLOCKED)
|
|
#endif /* _KERNEL */
|
|
|
|
void rn_init(void);
|
|
int rn_inithead(void **, int);
|
|
int rn_refines(void *, void *);
|
|
struct radix_node
|
|
*rn_addmask(void *, int, int),
|
|
*rn_addroute (void *, void *, struct radix_node_head *,
|
|
struct radix_node [2]),
|
|
*rn_delete(void *, void *, struct radix_node_head *),
|
|
*rn_lookup (void *v_arg, void *m_arg,
|
|
struct radix_node_head *head),
|
|
*rn_match(void *, struct radix_node_head *);
|
|
|
|
#endif /* _RADIX_H_ */
|