b1d86af706
always passes NULL pointer to it. Thus, code can be simplified and function renamed to llentry_alloc() to match rtalloc().
206 lines
6.4 KiB
C
206 lines
6.4 KiB
C
/*
|
|
* 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("$FreeBSD$");
|
|
|
|
#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_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_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_EXCLUSIVE 0x2000 /* return lle xlocked */
|
|
#define LLE_DELETE 0x4000 /* delete on a lookup - match LLE_IFADDR */
|
|
#define LLE_CREATE 0x8000 /* create on a lookup miss */
|
|
|
|
#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 *);
|
|
struct llentry *llentry_alloc(struct ifnet *, struct lltable *,
|
|
struct sockaddr_storage *);
|
|
|
|
/*
|
|
* 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_ */
|