48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_IF_HSR_H_
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#define _LINUX_IF_HSR_H_
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#include <linux/types.h>
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struct net_device;
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/* used to differentiate various protocols */
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enum hsr_version {
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HSR_V0 = 0,
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HSR_V1,
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PRP_V1,
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};
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/* HSR Tag.
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* As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
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* path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
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* h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
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* encapsulated protocol } instead.
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*
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* Field names as defined in the IEC:2010 standard for HSR.
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*/
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struct hsr_tag {
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__be16 path_and_LSDU_size;
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__be16 sequence_nr;
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__be16 encap_proto;
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} __packed;
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#define HSR_HLEN 6
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#if IS_ENABLED(CONFIG_HSR)
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extern bool is_hsr_master(struct net_device *dev);
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extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver);
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#else
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static inline bool is_hsr_master(struct net_device *dev)
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{
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return false;
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}
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static inline int hsr_get_version(struct net_device *dev,
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enum hsr_version *ver)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_HSR */
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#endif /*_LINUX_IF_HSR_H_*/
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