Current Path : /sys/net/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/net/if_llatbl.h |
/* * Copyright (c) 2004 Luigi Rizzo, Alessandro Cerri. All rights reserved. * Copyright (c) 2004-2008 Qing Li. All rights reserved. * Copyright (c) 2008 Kip Macy. 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. * * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/net/if_llatbl.h 225698 2011-09-20 20:27:26Z kmacy $"); #ifndef _NET_IF_LLATBL_H_ #define _NET_IF_LLATBL_H_ #include "opt_ofed.h" #include <sys/_rwlock.h> #include <netinet/in.h> struct ifnet; struct sysctl_req; struct rt_msghdr; struct rt_addrinfo; struct llentry; LIST_HEAD(llentries, llentry); extern struct rwlock lltable_rwlock; #define LLTABLE_RLOCK() rw_rlock(&lltable_rwlock) #define LLTABLE_RUNLOCK() rw_runlock(&lltable_rwlock) #define LLTABLE_WLOCK() rw_wlock(&lltable_rwlock) #define LLTABLE_WUNLOCK() rw_wunlock(&lltable_rwlock) #define LLTABLE_LOCK_ASSERT() rw_assert(&lltable_rwlock, RA_LOCKED) /* * Code referencing llentry must at least hold * a shared lock */ struct llentry { LIST_ENTRY(llentry) lle_next; struct rwlock lle_lock; struct lltable *lle_tbl; struct llentries *lle_head; void (*lle_free)(struct lltable *, struct llentry *); struct mbuf *la_hold; int la_numheld; /* # of packets currently held */ time_t la_expire; uint16_t la_flags; uint16_t la_asked; uint16_t la_preempt; uint16_t ln_byhint; int16_t ln_state; /* IPv6 has ND6_LLINFO_NOSTATE == -2 */ uint16_t ln_router; time_t ln_ntick; int lle_refcnt; union { uint64_t mac_aligned; uint16_t mac16[3]; #ifdef OFED uint8_t mac8[20]; /* IB needs 20 bytes. */ #endif } ll_addr; /* XXX af-private? */ union { struct callout ln_timer_ch; struct callout la_timer; } lle_timer; /* NB: struct sockaddr must immediately follow */ }; #define LLE_WLOCK(lle) rw_wlock(&(lle)->lle_lock) #define LLE_RLOCK(lle) rw_rlock(&(lle)->lle_lock) #define LLE_WUNLOCK(lle) rw_wunlock(&(lle)->lle_lock) #define LLE_RUNLOCK(lle) rw_runlock(&(lle)->lle_lock) #define LLE_DOWNGRADE(lle) rw_downgrade(&(lle)->lle_lock) #define LLE_TRY_UPGRADE(lle) rw_try_upgrade(&(lle)->lle_lock) #define LLE_LOCK_INIT(lle) rw_init_flags(&(lle)->lle_lock, "lle", RW_DUPOK) #define LLE_LOCK_DESTROY(lle) rw_destroy(&(lle)->lle_lock) #define LLE_WLOCK_ASSERT(lle) rw_assert(&(lle)->lle_lock, RA_WLOCKED) #define LLE_IS_VALID(lle) (((lle) != NULL) && ((lle) != (void *)-1)) #define LLE_ADDREF(lle) do { \ LLE_WLOCK_ASSERT(lle); \ KASSERT((lle)->lle_refcnt >= 0, \ ("negative refcnt %d", (lle)->lle_refcnt)); \ (lle)->lle_refcnt++; \ } while (0) #define LLE_REMREF(lle) do { \ LLE_WLOCK_ASSERT(lle); \ KASSERT((lle)->lle_refcnt > 1, \ ("bogus refcnt %d", (lle)->lle_refcnt)); \ (lle)->lle_refcnt--; \ } while (0) #define LLE_FREE_LOCKED(lle) do { \ if ((lle)->lle_refcnt <= 1) \ (lle)->lle_tbl->llt_free((lle)->lle_tbl, (lle));\ else { \ (lle)->lle_refcnt--; \ LLE_WUNLOCK(lle); \ } \ /* guard against invalid refs */ \ lle = NULL; \ } while (0) #define LLE_FREE(lle) do { \ LLE_WLOCK(lle); \ LLE_FREE_LOCKED(lle); \ } while (0) #define ln_timer_ch lle_timer.ln_timer_ch #define la_timer lle_timer.la_timer /* XXX bad name */ #define L3_ADDR(lle) ((struct sockaddr *)(&lle[1])) #define L3_ADDR_LEN(lle) (((struct sockaddr *)(&lle[1]))->sa_len) #ifndef LLTBL_HASHTBL_SIZE #define LLTBL_HASHTBL_SIZE 32 /* default 32 ? */ #endif #ifndef LLTBL_HASHMASK #define LLTBL_HASHMASK (LLTBL_HASHTBL_SIZE - 1) #endif struct lltable { SLIST_ENTRY(lltable) llt_link; struct llentries lle_head[LLTBL_HASHTBL_SIZE]; int llt_af; struct ifnet *llt_ifp; void (*llt_free)(struct lltable *, struct llentry *); void (*llt_prefix_free)(struct lltable *, const struct sockaddr *prefix, const struct sockaddr *mask, u_int flags); struct llentry * (*llt_lookup)(struct lltable *, u_int flags, const struct sockaddr *l3addr); int (*llt_dump)(struct lltable *, struct sysctl_req *); }; MALLOC_DECLARE(M_LLTABLE); /* * flags to be passed to arplookup. */ #define LLE_DELETED 0x0001 /* entry must be deleted */ #define LLE_STATIC 0x0002 /* entry is static */ #define LLE_IFADDR 0x0004 /* entry is interface addr */ #define LLE_VALID 0x0008 /* ll_addr is valid */ #define LLE_PROXY 0x0010 /* proxy entry ??? */ #define LLE_PUB 0x0020 /* publish entry ??? */ #define LLE_DELETE 0x4000 /* delete on a lookup - match LLE_IFADDR */ #define LLE_CREATE 0x8000 /* create on a lookup miss */ #define LLE_EXCLUSIVE 0x2000 /* return lle xlocked */ #define LLATBL_HASH(key, mask) \ (((((((key >> 8) ^ key) >> 8) ^ key) >> 8) ^ key) & mask) struct lltable *lltable_init(struct ifnet *, int); void lltable_free(struct lltable *); void lltable_prefix_free(int, struct sockaddr *, struct sockaddr *, u_int); #if 0 void lltable_drain(int); #endif int lltable_sysctl_dumparp(int, struct sysctl_req *); size_t llentry_free(struct llentry *); int llentry_update(struct llentry **, struct lltable *, struct sockaddr_storage *, struct ifnet *); /* * Generic link layer address lookup function. */ static __inline struct llentry * lla_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) { return llt->llt_lookup(llt, flags, l3addr); } int lla_rt_output(struct rt_msghdr *, struct rt_addrinfo *); #endif /* _NET_IF_LLATBL_H_ */