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net: dynamically allocate fqdir structures

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Following patch will add rcu grace period before fqdir
rhashtable destruction, so we need to dynamically allocate
fqdir structures to not force expensive synchronize_rcu() calls
in netns dismantle path.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2019-05-24 09:03:39 -07:00
committed by David S. Miller
parent a39aca678a
commit 4907abc605
11 changed files with 78 additions and 63 deletions
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24
net/ieee802154/6lowpan/reassembly.c
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@@ -79,7 +79,7 @@ fq_find(struct net *net, const struct lowpan_802154_cb *cb,
key.src = *src;
key.dst = *dst;
q = inet_frag_find(&ieee802154_lowpan->fqdir, &key);
q = inet_frag_find(ieee802154_lowpan->fqdir, &key);
if (!q)
return NULL;
@@ -377,11 +377,11 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
table[0].procname = NULL;
}
table[0].data = &ieee802154_lowpan->fqdir.high_thresh;
table[0].extra1 = &ieee802154_lowpan->fqdir.low_thresh;
table[1].data = &ieee802154_lowpan->fqdir.low_thresh;
table[1].extra2 = &ieee802154_lowpan->fqdir.high_thresh;
table[2].data = &ieee802154_lowpan->fqdir.timeout;
table[0].data = &ieee802154_lowpan->fqdir->high_thresh;
table[0].extra1 = &ieee802154_lowpan->fqdir->low_thresh;
table[1].data = &ieee802154_lowpan->fqdir->low_thresh;
table[1].extra2 = &ieee802154_lowpan->fqdir->high_thresh;
table[2].data = &ieee802154_lowpan->fqdir->timeout;
hdr = register_net_sysctl(net, "net/ieee802154/6lowpan", table);
if (hdr == NULL)
@@ -449,16 +449,18 @@ static int __net_init lowpan_frags_init_net(struct net *net)
net_ieee802154_lowpan(net);
int res;
ieee802154_lowpan->fqdir.high_thresh = IPV6_FRAG_HIGH_THRESH;
ieee802154_lowpan->fqdir.low_thresh = IPV6_FRAG_LOW_THRESH;
ieee802154_lowpan->fqdir.timeout = IPV6_FRAG_TIMEOUT;
res = fqdir_init(&ieee802154_lowpan->fqdir, &lowpan_frags, net);
if (res < 0)
return res;
ieee802154_lowpan->fqdir->high_thresh = IPV6_FRAG_HIGH_THRESH;
ieee802154_lowpan->fqdir->low_thresh = IPV6_FRAG_LOW_THRESH;
ieee802154_lowpan->fqdir->timeout = IPV6_FRAG_TIMEOUT;
res = lowpan_frags_ns_sysctl_register(net);
if (res < 0)
fqdir_exit(&ieee802154_lowpan->fqdir);
fqdir_exit(ieee802154_lowpan->fqdir);
return res;
}
@@ -468,7 +470,7 @@ static void __net_exit lowpan_frags_exit_net(struct net *net)
net_ieee802154_lowpan(net);
lowpan_frags_ns_sysctl_unregister(net);
fqdir_exit(&ieee802154_lowpan->fqdir);
fqdir_exit(ieee802154_lowpan->fqdir);
}
static struct pernet_operations lowpan_frags_ops = {