Charlie Root
5 months ago
2 changed files with 1389 additions and 0 deletions
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/*-
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* SPDX-License-Identifier: BSD-3-Clause |
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* |
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* Copyright (c) 1988, 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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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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#ifndef _RADIX_H_ |
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#define _RADIX_H_ |
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#ifdef _KERNEL |
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#include <sys/_lock.h> |
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#include <sys/_mutex.h> |
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#include <sys/_rmlock.h> |
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#endif |
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#ifdef MALLOC_DECLARE |
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MALLOC_DECLARE(M_RTABLE); |
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#endif |
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/*
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* Radix search tree node layout. |
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*/ |
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struct radix_node { |
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struct radix_mask *rn_mklist; /* list of masks contained in subtree */ |
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struct radix_node *rn_parent; /* parent */ |
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short rn_bit; /* bit offset; -1-index(netmask) */ |
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char rn_bmask; /* node: mask for bit test*/ |
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u_char rn_flags; /* enumerated next */ |
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#define RNF_NORMAL 1 /* leaf contains normal route */ |
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#define RNF_ROOT 2 /* leaf is root leaf for tree */ |
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#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */ |
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union { |
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struct { /* leaf only data: */ |
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caddr_t rn_Key; /* object of search */ |
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caddr_t rn_Mask; /* netmask, if present */ |
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struct radix_node *rn_Dupedkey; |
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} rn_leaf; |
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struct { /* node only data: */ |
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int rn_Off; /* where to start compare */ |
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struct radix_node *rn_L;/* progeny */ |
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struct radix_node *rn_R;/* progeny */ |
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} rn_node; |
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} rn_u; |
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#ifdef RN_DEBUG |
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int rn_info; |
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struct radix_node *rn_twin; |
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struct radix_node *rn_ybro; |
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#endif |
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}; |
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#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey |
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#define rn_key rn_u.rn_leaf.rn_Key |
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#define rn_mask rn_u.rn_leaf.rn_Mask |
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#define rn_offset rn_u.rn_node.rn_Off |
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#define rn_left rn_u.rn_node.rn_L |
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#define rn_right rn_u.rn_node.rn_R |
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/*
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* Annotations to tree concerning potential routes applying to subtrees. |
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*/ |
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struct radix_mask { |
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short rm_bit; /* bit offset; -1-index(netmask) */ |
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char rm_unused; /* cf. rn_bmask */ |
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u_char rm_flags; /* cf. rn_flags */ |
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struct radix_mask *rm_mklist; /* more masks to try */ |
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union { |
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caddr_t rmu_mask; /* the mask */ |
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struct radix_node *rmu_leaf; /* for normal routes */ |
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} rm_rmu; |
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int rm_refs; /* # of references to this struct */ |
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}; |
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#define rm_mask rm_rmu.rmu_mask |
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#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */ |
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struct radix_head; |
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typedef int walktree_f_t(struct radix_node *, void *); |
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typedef struct radix_node *rn_matchaddr_f_t(const void *v, |
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struct radix_head *head); |
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typedef struct radix_node *rn_addaddr_f_t(void *v, const void *mask, |
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struct radix_head *head, struct radix_node nodes[]); |
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typedef struct radix_node *rn_deladdr_f_t(const void *v, const void *mask, |
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struct radix_head *head); |
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typedef struct radix_node *rn_lookup_f_t(const void *v, const void *mask, |
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struct radix_head *head); |
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typedef int rn_walktree_t(struct radix_head *head, walktree_f_t *f, |
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void *w); |
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typedef int rn_walktree_from_t(struct radix_head *head, |
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void *a, void *m, walktree_f_t *f, void *w); |
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typedef void rn_close_t(struct radix_node *rn, struct radix_head *head); |
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struct radix_node *rn_nextprefix(struct radix_node *rn); |
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struct radix_mask_head; |
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struct radix_head { |
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struct radix_node *rnh_treetop; |
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struct radix_mask_head *rnh_masks; /* Storage for our masks */ |
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}; |
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struct radix_node_head { |
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struct radix_head rh; |
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rn_matchaddr_f_t *rnh_matchaddr; /* longest match for sockaddr */ |
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rn_addaddr_f_t *rnh_addaddr; /* add based on sockaddr*/ |
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rn_deladdr_f_t *rnh_deladdr; /* remove based on sockaddr */ |
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rn_lookup_f_t *rnh_lookup; /* exact match for sockaddr */ |
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rn_walktree_t *rnh_walktree; /* traverse tree */ |
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rn_walktree_from_t *rnh_walktree_from; /* traverse tree below a */ |
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rn_close_t *rnh_close; /*do something when the last ref drops*/ |
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struct radix_node rnh_nodes[3]; /* empty tree for common case */ |
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#ifdef _KERNEL |
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struct rmlock rnh_lock; /* locks entire radix tree */ |
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#endif |
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}; |
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struct radix_mask_head { |
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struct radix_head head; |
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struct radix_node mask_nodes[3]; |
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}; |
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void rn_inithead_internal(struct radix_head *rh, struct radix_node *base_nodes, |
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int off); |
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#ifndef _KERNEL |
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#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n))) |
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#define R_Zalloc(p, t, n) (p = (t) calloc(1,(unsigned int)(n))) |
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#define R_Free(p) free((char *)p); |
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#else |
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#define R_Malloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT)) |
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#define R_Zalloc(p, t, n) (p = (t) malloc((unsigned long)(n), M_RTABLE, M_NOWAIT | M_ZERO)) |
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#define R_Free(p) free((caddr_t)p, M_RTABLE); |
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#define RADIX_NODE_HEAD_RLOCK_TRACKER struct rm_priotracker _rnh_tracker |
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#define RADIX_NODE_HEAD_LOCK_INIT(rnh) \ |
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rm_init(&(rnh)->rnh_lock, "radix node head") |
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#define RADIX_NODE_HEAD_LOCK(rnh) rm_wlock(&(rnh)->rnh_lock) |
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#define RADIX_NODE_HEAD_UNLOCK(rnh) rm_wunlock(&(rnh)->rnh_lock) |
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#define RADIX_NODE_HEAD_RLOCK(rnh) rm_rlock(&(rnh)->rnh_lock,\ |
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&_rnh_tracker) |
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#define RADIX_NODE_HEAD_RUNLOCK(rnh) rm_runlock(&(rnh)->rnh_lock,\ |
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&_rnh_tracker) |
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#define RADIX_NODE_HEAD_DESTROY(rnh) rm_destroy(&(rnh)->rnh_lock) |
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#define RADIX_NODE_HEAD_LOCK_ASSERT(rnh) rm_assert(&(rnh)->rnh_lock, RA_LOCKED) |
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#define RADIX_NODE_HEAD_WLOCK_ASSERT(rnh) rm_assert(&(rnh)->rnh_lock, RA_WLOCKED) |
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#endif /* _KERNEL */ |
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int rn_inithead(void **, int); |
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int rn_detachhead(void **); |
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int rn_refines(const void *, const void *); |
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struct radix_node *rn_addroute(void *, const void *, struct radix_head *, |
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struct radix_node[2]); |
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struct radix_node *rn_delete(const void *, const void *, struct radix_head *); |
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struct radix_node *rn_lookup (const void *v_arg, const void *m_arg, |
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struct radix_head *head); |
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struct radix_node *rn_match(const void *, struct radix_head *); |
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int rn_walktree_from(struct radix_head *h, void *a, void *m, |
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walktree_f_t *f, void *w); |
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int rn_walktree(struct radix_head *, walktree_f_t *, void *); |
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#endif /* _RADIX_H_ */ |
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