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da546e0764
Allowing the packet to be modified by execution allows less data copying for userspace action execution. Some users of the dpif_execute already expect that the packet may be modified. This patch makes this behavior uniform and makes the userspace datapath and the execution helpers modify the packet as it is being executed. Userspace action now steals the packet if given permission, as the packet is normally not needed after it. The only exception is the sample action, and this is accounted for my keeping track of any actions that could be following the userspace action. The packet in dpif_upcall is changed from a pointer to a struct, allowing the packet to be honest about it's headroom. After this change the packet can safely be pushed on over the precarious 4 byte limit earlier allowed by the netlink data preceding the packet. Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com> Acked-by: Ben Pfaff <blp@nicira.com>
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/*
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* Copyright (c) 2013 Nicira, Inc.
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* Copyright (c) 2013 Simon Horman
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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 EXECUTE_ACTIONS_H
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#define EXECUTE_ACTIONS_H 1
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "openvswitch/types.h"
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struct flow;
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struct nlattr;
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struct ofpbuf;
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typedef void (*odp_output_cb)(void *dp, struct ofpbuf *packet,
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const struct flow *key, odp_port_t out_port);
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typedef void (*odp_userspace_cb)(void *dp, struct ofpbuf *packet,
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const struct flow *key,
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const struct nlattr *action, bool may_steal);
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void
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odp_execute_actions(void *dp, struct ofpbuf *packet, struct flow *key,
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const struct nlattr *actions, size_t actions_len,
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odp_output_cb output, odp_userspace_cb userspace);
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#endif
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