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OVS: remove use of VLAN_TAG_PRESENT 

This is a minimal change to allow removing of VLAN_TAG_PRESENT.
It leaves OVS unable to use CFI bit, as fixing this would need
a deeper surgery involving userspace interface.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław 2018-11-08 18:44:50 +01:00 committed by David S. Miller
parent f723a1a293
commit 9df46aefaf
4 changed files with 23 additions and 18 deletions
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13
net/openvswitch/actions.c
View File

@ -301,7 +301,7 @@ static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
key->eth.vlan.tpid = vlan->vlan_tpid;
}
return skb_vlan_push(skb, vlan->vlan_tpid,
ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
ntohs(vlan->vlan_tci) & ~VLAN_CFI_MASK);
}
/* 'src' is already properly masked. */
@ -822,8 +822,10 @@ static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *sk
__skb_dst_copy(skb, data->dst);
*OVS_CB(skb) = data->cb;
skb->inner_protocol = data->inner_protocol;
skb->vlan_tci = data->vlan_tci;
skb->vlan_proto = data->vlan_proto;
if (data->vlan_tci & VLAN_CFI_MASK)
__vlan_hwaccel_put_tag(skb, data->vlan_proto, data->vlan_tci & ~VLAN_CFI_MASK);
else
__vlan_hwaccel_clear_tag(skb);
/* Reconstruct the MAC header. */
skb_push(skb, data->l2_len);
@ -867,7 +869,10 @@ static void prepare_frag(struct vport *vport, struct sk_buff *skb,
data->cb = *OVS_CB(skb);
data->inner_protocol = skb->inner_protocol;
data->network_offset = orig_network_offset;
data->vlan_tci = skb->vlan_tci;
if (skb_vlan_tag_present(skb))
data->vlan_tci = skb_vlan_tag_get(skb) | VLAN_CFI_MASK;
else
data->vlan_tci = 0;
data->vlan_proto = skb->vlan_proto;
data->mac_proto = mac_proto;
data->l2_len = hlen;

4
net/openvswitch/flow.c
View File

@ -325,7 +325,7 @@ static int parse_vlan_tag(struct sk_buff *skb, struct vlan_head *key_vh,
return -ENOMEM;
vh = (struct vlan_head *)skb->data;
key_vh->tci = vh->tci | htons(VLAN_TAG_PRESENT);
key_vh->tci = vh->tci | htons(VLAN_CFI_MASK);
key_vh->tpid = vh->tpid;
if (unlikely(untag_vlan)) {
@ -358,7 +358,7 @@ static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
int res;
if (skb_vlan_tag_present(skb)) {
key->eth.vlan.tci = htons(skb->vlan_tci);
key->eth.vlan.tci = htons(skb->vlan_tci) | htons(VLAN_CFI_MASK);
key->eth.vlan.tpid = skb->vlan_proto;
} else {
/* Parse outer vlan tag in the non-accelerated case. */

2
net/openvswitch/flow.h
View File

@ -60,7 +60,7 @@ struct ovs_tunnel_info {
struct vlan_head {
__be16 tpid; /* Vlan type. Generally 802.1q or 802.1ad.*/
__be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
__be16 tci; /* 0 if no VLAN, VLAN_CFI_MASK set otherwise. */
};
#define OVS_SW_FLOW_KEY_METADATA_SIZE \

22
net/openvswitch/flow_netlink.c
View File

@ -990,9 +990,9 @@ static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
if (a[OVS_KEY_ATTR_VLAN])
tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
if (!(tci & htons(VLAN_TAG_PRESENT))) {
if (!(tci & htons(VLAN_CFI_MASK))) {
if (tci) {
OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
(inner) ? "C-VLAN" : "VLAN");
return -EINVAL;
} else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
@ -1013,9 +1013,9 @@ static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
__be16 tci = 0;
__be16 tpid = 0;
bool encap_valid = !!(match->key->eth.vlan.tci &
htons(VLAN_TAG_PRESENT));
htons(VLAN_CFI_MASK));
bool i_encap_valid = !!(match->key->eth.cvlan.tci &
htons(VLAN_TAG_PRESENT));
htons(VLAN_CFI_MASK));
if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
/* Not a VLAN. */
@ -1039,8 +1039,8 @@ static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
(inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
return -EINVAL;
}
if (!(tci & htons(VLAN_TAG_PRESENT))) {
OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
if (!(tci & htons(VLAN_CFI_MASK))) {
OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
(inner) ? "C-VLAN" : "VLAN");
return -EINVAL;
}
@ -1095,7 +1095,7 @@ static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
if (err)
return err;
encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
if (encap_valid) {
err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
is_mask, log);
@ -2943,7 +2943,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
vlan = nla_data(a);
if (!eth_type_vlan(vlan->vlan_tpid))
return -EINVAL;
if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
return -EINVAL;
vlan_tci = vlan->vlan_tci;
break;
@ -2959,7 +2959,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
/* Prohibit push MPLS other than to a white list
* for packets that have a known tag order.
*/
if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
if (vlan_tci & htons(VLAN_CFI_MASK) ||
(eth_type != htons(ETH_P_IP) &&
eth_type != htons(ETH_P_IPV6) &&
eth_type != htons(ETH_P_ARP) &&
@ -2971,7 +2971,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
}
case OVS_ACTION_ATTR_POP_MPLS:
if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
if (vlan_tci & htons(VLAN_CFI_MASK) ||
!eth_p_mpls(eth_type))
return -EINVAL;
@ -3036,7 +3036,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
case OVS_ACTION_ATTR_POP_ETH:
if (mac_proto != MAC_PROTO_ETHERNET)
return -EINVAL;
if (vlan_tci & htons(VLAN_TAG_PRESENT))
if (vlan_tci & htons(VLAN_CFI_MASK))
return -EINVAL;
mac_proto = MAC_PROTO_NONE;
break;