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authorEric Dumazet <edumazet@google.com>2019-05-24 09:03:39 -0700
committerDavid S. Miller <davem@davemloft.net>2019-05-26 14:08:05 -0700
commit4907abc605e328d61bee56e4e89db4f56ade2090 (patch)
tree764e708aaa78091e2a8ccb046cfbf8a59aa10c88 /net/ieee802154/6lowpan
parenta39aca678a0626941aa99c18c1c452ca758e7865 (diff)
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net: dynamically allocate fqdir structures
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>
Diffstat (limited to 'net/ieee802154/6lowpan')
-rw-r--r--net/ieee802154/6lowpan/reassembly.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index 03a444c9e191..e59c3b708969 100644
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -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 = {