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openvswitch: Specify the minimal length of OVS_PACKET_ATTR_PACKET in the policy

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Specifying the minimal length in the policy makes it reuseable
and documents the interface.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Thomas Graf 2013-03-29 14:46:47 +01:00 committed by Jesse Gross
parent f498354793
commit dded45fc17
1 changed files with 2 additions and 3 deletions
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5
net/openvswitch/datapath.c
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@ -662,8 +662,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
err = -EINVAL;
if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
!a[OVS_PACKET_ATTR_ACTIONS] ||
nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
!a[OVS_PACKET_ATTR_ACTIONS])
goto err;
len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
@ -744,7 +743,7 @@ err:
}
static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
[OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC },
[OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
[OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
[OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
};