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Make LLTABLE list lock private for if_llatbl.c

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Rename lock and macros to reflect that it protects V_lltables list.
This commit is contained in:
Andrey V. Elsukov 2016-10-11 17:41:13 +00:00
parent 9ba323071d
commit 199511bcdd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=307062
2 changed files with 20 additions and 23 deletions
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35
sys/net/if_llatbl.c
View File

@ -66,8 +66,13 @@ static VNET_DEFINE(SLIST_HEAD(, lltable), lltables) =
SLIST_HEAD_INITIALIZER(lltables);
#define V_lltables VNET(lltables)
struct rwlock lltable_rwlock;
RW_SYSINIT(lltable_rwlock, &lltable_rwlock, "lltable_rwlock");
static struct rwlock lltable_list_lock;
RW_SYSINIT(lltable_list_lock, &lltable_list_lock, "lltable_list_lock");
#define LLTABLE_LIST_RLOCK() rw_rlock(&lltable_list_lock)
#define LLTABLE_LIST_RUNLOCK() rw_runlock(&lltable_list_lock)
#define LLTABLE_LIST_WLOCK() rw_wlock(&lltable_list_lock)
#define LLTABLE_LIST_WUNLOCK() rw_wunlock(&lltable_list_lock)
#define LLTABLE_LIST_LOCK_ASSERT() rw_assert(&lltable_list_lock, RA_LOCKED)
static void lltable_unlink(struct lltable *llt);
static void llentries_unlink(struct lltable *llt, struct llentries *head);
@ -85,7 +90,7 @@ lltable_dump_af(struct lltable *llt, struct sysctl_req *wr)
{
int error;
LLTABLE_LOCK_ASSERT();
LLTABLE_LIST_LOCK_ASSERT();
if (llt->llt_ifp->if_flags & IFF_LOOPBACK)
return (0);
@ -108,7 +113,7 @@ lltable_sysctl_dumparp(int af, struct sysctl_req *wr)
struct lltable *llt;
int error = 0;
LLTABLE_RLOCK();
LLTABLE_LIST_RLOCK();
SLIST_FOREACH(llt, &V_lltables, llt_link) {
if (llt->llt_af == af) {
error = lltable_dump_af(llt, wr);
@ -117,7 +122,7 @@ lltable_sysctl_dumparp(int af, struct sysctl_req *wr)
}
}
done:
LLTABLE_RUNLOCK();
LLTABLE_LIST_RUNLOCK();
return (error);
}
@ -531,7 +536,7 @@ lltable_drain(int af)
struct llentry *lle;
register int i;
LLTABLE_RLOCK();
LLTABLE_LIST_RLOCK();
SLIST_FOREACH(llt, &V_lltables, llt_link) {
if (llt->llt_af != af)
continue;
@ -547,7 +552,7 @@ lltable_drain(int af)
}
}
}
LLTABLE_RUNLOCK();
LLTABLE_LIST_RUNLOCK();
}
#endif
@ -591,14 +596,14 @@ lltable_prefix_free(int af, struct sockaddr *addr, struct sockaddr *mask,
{
struct lltable *llt;
LLTABLE_RLOCK();
LLTABLE_LIST_RLOCK();
SLIST_FOREACH(llt, &V_lltables, llt_link) {
if (llt->llt_af != af)
continue;
llt->llt_prefix_free(llt, addr, mask, flags);
}
LLTABLE_RUNLOCK();
LLTABLE_LIST_RUNLOCK();
}
struct lltable *
@ -632,18 +637,18 @@ void
lltable_link(struct lltable *llt)
{
LLTABLE_WLOCK();
LLTABLE_LIST_WLOCK();
SLIST_INSERT_HEAD(&V_lltables, llt, llt_link);
LLTABLE_WUNLOCK();
LLTABLE_LIST_WUNLOCK();
}
static void
lltable_unlink(struct lltable *llt)
{
LLTABLE_WLOCK();
LLTABLE_LIST_WLOCK();
SLIST_REMOVE(&V_lltables, llt, lltable, llt_link);
LLTABLE_WUNLOCK();
LLTABLE_LIST_WUNLOCK();
}
@ -739,13 +744,13 @@ lla_rt_output(struct rt_msghdr *rtm, struct rt_addrinfo *info)
}
/* XXX linked list may be too expensive */
LLTABLE_RLOCK();
LLTABLE_LIST_RLOCK();
SLIST_FOREACH(llt, &V_lltables, llt_link) {
if (llt->llt_af == dst->sa_family &&
llt->llt_ifp == ifp)
break;
}
LLTABLE_RUNLOCK();
LLTABLE_LIST_RUNLOCK();
KASSERT(llt != NULL, ("Yep, ugly hacks are bad\n"));
error = 0;

8
sys/net/if_llatbl.h
View File

@ -37,17 +37,9 @@ 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)
#define LLE_MAX_LINKHDR 24 /* Full IB header */
/*
* Code referencing llentry must at least hold