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81f71381ff
This patch adds a new OpenFlow action, delete field, to delete a
field in packets. Currently, only the tun_metadata fields are
supported.
One use case to add this action is to support multiple versions
of geneve tunnel metadatas to be exchanged among different versions
of networks. For example, we may introduce tun_metadata2 to
replace old tun_metadata1, but still want to provide backward
compatibility to the older release. In this case, in the new
OpenFlow pipeline, we would like to support the case to receive a
packet with tun_metadata1, do some processing. And if the packet
is going to a switch in the newer release, we would like to delete
the value in tun_metadata1 and set a value into tun_metadata2.
Currently, ovs does not provide an action to remove a value in
tun_metadata if the value is present. This patch fulfills the gap
by adding the delete_field action. For example, the OpenFlow
syntax to delete tun_metadata1 is:
actions=delete_field:tun_metadata1
Signed-off-by: Yi-Hung Wei <yihung.wei@gmail.com>
Signed-off-by: William Tu <u9012063@gmail.com>
Acked-by: William Tu <u9012063@gmail.com>
81 lines
3.3 KiB
C
81 lines
3.3 KiB
C
/*
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* Copyright (c) 2015 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TUN_METADATA_H
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#define TUN_METADATA_H 1
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#include <stdint.h>
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#include "openvswitch/dynamic-string.h"
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#include "netlink.h"
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#include "openvswitch/ofpbuf.h"
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#include "openflow/openflow.h"
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#include "openvswitch/tun-metadata.h"
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struct flow_tnl;
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struct match;
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struct mf_field;
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union mf_value;
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struct ofputil_tlv_table_mod;
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struct ofputil_tlv_table_reply;
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struct tun_table;
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struct tun_table *tun_metadata_alloc(const struct tun_table *old_map);
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void tun_metadata_free(struct tun_table *);
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void tun_metadata_postpone_free(struct tun_table *);
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enum ofperr tun_metadata_table_mod(struct ofputil_tlv_table_mod *,
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const struct tun_table *old_tab,
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struct tun_table **new_tab);
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void tun_metadata_table_request(const struct tun_table *,
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struct ofputil_tlv_table_reply *);
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void tun_metadata_read(const struct flow_tnl *,
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const struct mf_field *, union mf_value *);
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void tun_metadata_write(struct flow_tnl *,
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const struct mf_field *, const union mf_value *);
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void tun_metadata_delete(struct flow_tnl *, const struct mf_field *);
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void tun_metadata_set_match(const struct mf_field *,
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const union mf_value *value,
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const union mf_value *mask, struct match *,
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char **err_str);
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void tun_metadata_get_fmd(const struct flow_tnl *, struct match *flow_metadata);
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void tun_metadata_from_geneve_nlattr(const struct nlattr *attr, bool is_mask,
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struct flow_tnl *tun);
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void tun_metadata_to_geneve_nlattr(const struct flow_tnl *tun,
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const struct flow_tnl *flow,
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const struct ofpbuf *key,
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struct ofpbuf *);
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int tun_metadata_from_geneve_udpif(const struct tun_table *,
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const struct flow_tnl *flow,
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const struct flow_tnl *src,
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struct flow_tnl *dst);
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void tun_metadata_to_geneve_udpif_mask(const struct flow_tnl *flow_src,
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const struct flow_tnl *mask_src,
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const struct geneve_opt *flow_src_opt,
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int opts_len, struct geneve_opt *dst);
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int tun_metadata_to_geneve_header(const struct flow_tnl *flow,
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struct geneve_opt *, bool *crit_opt);
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void tun_metadata_to_nx_match(struct ofpbuf *b, enum ofp_version oxm,
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const struct match *);
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void tun_metadata_match_format(struct ds *, const struct match *);
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#endif /* tun-metadata.h */
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