mirror of
https://github.com/openvswitch/ovs
synced 2025-08-30 22:05:19 +00:00
4e022ec09e
Until now, datapath ports and openflow ports were both represented by unsigned integers of various sizes. With implicit conversions, etc., it is easy to mix them up and use one where the other is expected. This commit creates two typedefs, ofp_port_t and odp_port_t. Both of these two types are marked by "__attribute__((bitwise))" so that sparse can be used to detect any misuse. Signed-off-by: Alex Wang <alexw@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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* Copyright (c) 2010, 2011, 2013 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 OPENVSWITCH_TYPES_H
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#define OPENVSWITCH_TYPES_H 1
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#include <linux/types.h>
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#include <sys/types.h>
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#include <stdint.h>
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#ifdef __CHECKER__
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#define OVS_BITWISE __attribute__((bitwise))
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#define OVS_FORCE __attribute__((force))
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#else
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#define OVS_BITWISE
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#define OVS_FORCE
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#endif
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/* The ovs_be<N> types indicate that an object is in big-endian, not
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* native-endian, byte order. They are otherwise equivalent to uint<N>_t.
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*
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* We bootstrap these from the Linux __be<N> types. If we instead define our
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* own independently then __be<N> and ovs_be<N> become mutually
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* incompatible. */
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typedef __be16 ovs_be16;
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typedef __be32 ovs_be32;
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typedef __be64 ovs_be64;
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/* Netlink and OpenFlow both contain 64-bit values that are only guaranteed to
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* be aligned on 32-bit boundaries. These types help.
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*
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* lib/unaligned.h has helper functions for accessing these. */
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/* A 64-bit value, in host byte order, that is only aligned on a 32-bit
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* boundary. */
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typedef struct {
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#ifdef WORDS_BIGENDIAN
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uint32_t hi, lo;
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#else
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uint32_t lo, hi;
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#endif
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} ovs_32aligned_u64;
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/* A 64-bit value, in network byte order, that is only aligned on a 32-bit
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* boundary. */
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typedef struct {
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ovs_be32 hi, lo;
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} ovs_32aligned_be64;
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/* ofp_port_t represents the port number of a OpenFlow switch.
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* odp_port_t represents the port number on the datapath.
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* ofp11_port_t represents the OpenFlow-1.1 port number. */
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typedef uint16_t OVS_BITWISE ofp_port_t;
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typedef uint32_t OVS_BITWISE odp_port_t;
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typedef uint32_t OVS_BITWISE ofp11_port_t;
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/* Macro functions that cast int types to ofp/odp/ofp11 types. */
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#define OFP_PORT_C(X) ((OVS_FORCE ofp_port_t) (X))
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#define ODP_PORT_C(X) ((OVS_FORCE odp_port_t) (X))
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#define OFP11_PORT_C(X) ((OVS_FORCE ofp11_port_t) (X))
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#endif /* openvswitch/types.h */
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