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ifnet: use ck_pr(3) store & load setting ifnet pointer in ifindex

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The lockless access to the array is protected by the network epoch.

Reviewed by:		bz, kp
Differential revision:	https://reviews.freebsd.org/D33260
This commit is contained in:
Gleb Smirnoff 2021-12-04 09:49:35 -08:00
parent 8062e5759c
commit 450394af27
1 changed files with 3 additions and 3 deletions
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6
sys/net/if.c
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@ -350,7 +350,7 @@ ifnet_byindex(u_short idx)
if (__predict_false(idx > V_if_index))
return (NULL);
return (V_ifindex_table[idx]);
return (ck_pr_load_ptr(&V_ifindex_table[idx]));
}
struct ifnet *
@ -403,7 +403,7 @@ ifindex_free(u_short idx)
IFNET_WLOCK_ASSERT();
V_ifindex_table[idx] = NULL;
ck_pr_store_ptr(&V_ifindex_table[idx], NULL);
while (V_if_index > 0 &&
V_ifindex_table[V_if_index] == NULL)
V_if_index--;
@ -414,7 +414,7 @@ ifnet_setbyindex(u_short idx, struct ifnet *ifp)
{
ifp->if_index = idx;
V_ifindex_table[idx] = ifp;
ck_pr_store_ptr(&V_ifindex_table[idx], ifp);
}
struct ifaddr *