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add ifnet_byindex_locked to allow for use of IFNET_RLOCK

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This commit is contained in:
Kip Macy 2008-12-18 04:50:44 +00:00
parent 2db461e489
commit d24c444ca0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186266
1 changed files with 17 additions and 8 deletions
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25
sys/net/if.c
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@ -191,15 +191,24 @@ MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
struct ifnet *
ifnet_byindex(u_short idx)
static struct ifnet *
ifnet_byindex_locked(u_short idx)
{
INIT_VNET_NET(curvnet);
struct ifnet *ifp;
IFNET_WLOCK();
ifp = V_ifindex_table[idx].ife_ifnet;
IFNET_WUNLOCK();
return (ifp);
}
struct ifnet *
ifnet_byindex(u_short idx)
{
struct ifnet *ifp;
IFNET_RLOCK();
ifp = ifnet_byindex_locked(idx);
IFNET_RUNLOCK();
return (ifp);
}
@ -218,9 +227,9 @@ ifaddr_byindex(u_short idx)
{
struct ifaddr *ifa;
IFNET_WLOCK();
ifa = ifnet_byindex(idx)->if_addr;
IFNET_WUNLOCK();
IFNET_RLOCK();
ifa = ifnet_byindex_locked(idx)->if_addr;
IFNET_RUNLOCK();
return (ifa);
}
@ -499,7 +508,7 @@ if_free_type(struct ifnet *ifp, u_char type)
ifnet_setbyindex(ifp->if_index, NULL);
/* XXX: should be locked with if_findindex() */
while (V_if_index > 0 && ifnet_byindex(V_if_index) == NULL)
while (V_if_index > 0 && ifnet_byindex_locked(V_if_index) == NULL)
V_if_index--;
IFNET_WUNLOCK();