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datapath: VLAN actions should use push/pop semantics

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Currently the kernel vlan actions mirror those used by OpenFlow 1.0.
i.e. MODIFY and STRIP. More flexible approach is to have an action to
push a tag and pop a tag off, so that it can handle multiple levels of vlan
tags. Plus it aligns with newer version of OpenFlow.
        As this patch replaces MODIFY with PUSH semantic, action
mapping done in userpace is fixed accordingly.
        GSO handling for multiple levels of vlan tags is also added as
Jesse suggested before.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin Shelar
2011-09-09 18:13:26 -07:00
parent f37c91c767
commit d9065a90b6
14 changed files with 232 additions and 75 deletions
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12
lib/odp-util.c
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@@ -49,8 +49,8 @@ odp_action_len(uint16_t type)
switch ((enum ovs_action_type) type) {
case OVS_ACTION_ATTR_OUTPUT: return 4;
case OVS_ACTION_ATTR_USERSPACE: return 8;
case OVS_ACTION_ATTR_SET_DL_TCI: return 2;
case OVS_ACTION_ATTR_STRIP_VLAN: return 0;
case OVS_ACTION_ATTR_PUSH_VLAN: return 2;
case OVS_ACTION_ATTR_POP_VLAN: return 0;
case OVS_ACTION_ATTR_SET_DL_SRC: return ETH_ADDR_LEN;
case OVS_ACTION_ATTR_SET_DL_DST: return ETH_ADDR_LEN;
case OVS_ACTION_ATTR_SET_NW_SRC: return 4;
@@ -113,13 +113,13 @@ format_odp_action(struct ds *ds, const struct nlattr *a)
ds_put_format(ds, "set_tunnel(%#"PRIx64")",
ntohll(nl_attr_get_be64(a)));
break;
case OVS_ACTION_ATTR_SET_DL_TCI:
ds_put_format(ds, "set_tci(vid=%"PRIu16",pcp=%d)",
case OVS_ACTION_ATTR_PUSH_VLAN:
ds_put_format(ds, "push_vlan(vid=%"PRIu16",pcp=%d)",
vlan_tci_to_vid(nl_attr_get_be16(a)),
vlan_tci_to_pcp(nl_attr_get_be16(a)));
break;
case OVS_ACTION_ATTR_STRIP_VLAN:
ds_put_format(ds, "strip_vlan");
case OVS_ACTION_ATTR_POP_VLAN:
ds_put_format(ds, "pop_vlan");
break;
case OVS_ACTION_ATTR_SET_DL_SRC:
eth = nl_attr_get_unspec(a, ETH_ADDR_LEN);