[mirror_ubuntu-jammy-kernel.git] / net / hsr / hsr_main.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright 2011-2014 Autronica Fire and Security AS
 *
 * Author(s):
 *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
 *
 * include file for HSR and PRP.
 */

#ifndef __HSR_PRIVATE_H
#define __HSR_PRIVATE_H

#include <linux/netdevice.h>
#include <linux/list.h>
#include <linux/if_vlan.h>
#include <linux/if_hsr.h>

/* Time constants as specified in the HSR specification (IEC-62439-3 2010)
 * Table 8.
 * All values in milliseconds.
 */
#define HSR_LIFE_CHECK_INTERVAL		 2000 /* ms */
#define HSR_NODE_FORGET_TIME		60000 /* ms */
#define HSR_ANNOUNCE_INTERVAL		  100 /* ms */
#define HSR_ENTRY_FORGET_TIME		  400 /* ms */

/* By how much may slave1 and slave2 timestamps of latest received frame from
 * each node differ before we notify of communication problem?
 */
#define MAX_SLAVE_DIFF			 3000 /* ms */
#define HSR_SEQNR_START			(USHRT_MAX - 1024)
#define HSR_SUP_SEQNR_START		(HSR_SEQNR_START / 2)

/* How often shall we check for broken ring and remove node entries older than
 * HSR_NODE_FORGET_TIME?
 */
#define PRUNE_PERIOD			 3000 /* ms */

#define HSR_TLV_ANNOUNCE		   22
#define HSR_TLV_LIFE_CHECK		   23
/* PRP V1 life check for Duplicate discard */
#define PRP_TLV_LIFE_CHECK_DD		   20
/* PRP V1 life check for Duplicate Accept */
#define PRP_TLV_LIFE_CHECK_DA		   21

/* HSR Tag.
 * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
 * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
 * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
 * encapsulated protocol } instead.
 *
 * Field names as defined in the IEC:2010 standard for HSR.
 */
struct hsr_tag {
	__be16		path_and_LSDU_size;
	__be16		sequence_nr;
	__be16		encap_proto;
} __packed;

#define HSR_HLEN	6

#define HSR_V1_SUP_LSDUSIZE		52

/* The helper functions below assumes that 'path' occupies the 4 most
 * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
 * equivalently, the 4 most significant bits of HSR tag byte 14).
 *
 * This is unclear in the IEC specification; its definition of MAC addresses
 * indicates the spec is written with the least significant bit first (to the
 * left). This, however, would mean that the LSDU field would be split in two
 * with the path field in-between, which seems strange. I'm guessing the MAC
 * address definition is in error.
 */

static inline void set_hsr_tag_path(struct hsr_tag *ht, u16 path)
{
	ht->path_and_LSDU_size =
		htons((ntohs(ht->path_and_LSDU_size) & 0x0FFF) | (path << 12));
}

static inline void set_hsr_tag_LSDU_size(struct hsr_tag *ht, u16 LSDU_size)
{
	ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) &
				       0xF000) | (LSDU_size & 0x0FFF));
}

struct hsr_ethhdr {
	struct ethhdr	ethhdr;
	struct hsr_tag	hsr_tag;
} __packed;

struct hsr_vlan_ethhdr {
	struct vlan_ethhdr vlanhdr;
	struct hsr_tag	hsr_tag;
} __packed;

/* HSR/PRP Supervision Frame data types.
 * Field names as defined in the IEC:2010 standard for HSR.
 */
struct hsr_sup_tag {
	__be16		path_and_HSR_ver;
	__be16		sequence_nr;
	__u8		HSR_TLV_type;
	__u8		HSR_TLV_length;
} __packed;

struct hsr_sup_payload {
	unsigned char	macaddress_A[ETH_ALEN];
} __packed;

static inline void set_hsr_stag_path(struct hsr_sup_tag *hst, u16 path)
{
	set_hsr_tag_path((struct hsr_tag *)hst, path);
}

static inline void set_hsr_stag_HSR_ver(struct hsr_sup_tag *hst, u16 HSR_ver)
{
	set_hsr_tag_LSDU_size((struct hsr_tag *)hst, HSR_ver);
}

struct hsrv0_ethhdr_sp {
	struct ethhdr		ethhdr;
	struct hsr_sup_tag	hsr_sup;
} __packed;

struct hsrv1_ethhdr_sp {
	struct ethhdr		ethhdr;
	struct hsr_tag		hsr;
	struct hsr_sup_tag	hsr_sup;
} __packed;

enum hsr_port_type {
	HSR_PT_NONE = 0,	/* Must be 0, used by framereg */
	HSR_PT_SLAVE_A,
	HSR_PT_SLAVE_B,
	HSR_PT_INTERLINK,
	HSR_PT_MASTER,
	HSR_PT_PORTS,	/* This must be the last item in the enum */
};

/* PRP Redunancy Control Trailor (RCT).
 * As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr,
 * Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }.
 *
 * Field names as defined in the IEC:2012 standard for PRP.
 */
struct prp_rct {
	__be16          sequence_nr;
	__be16          lan_id_and_LSDU_size;
	__be16          PRP_suffix;
} __packed;

static inline u16 get_prp_LSDU_size(struct prp_rct *rct)
{
	return ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF;
}

static inline void set_prp_lan_id(struct prp_rct *rct, u16 lan_id)
{
	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
					  0x0FFF) | (lan_id << 12));
}
static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size)
{
	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
					  0xF000) | (LSDU_size & 0x0FFF));
}

struct hsr_port {
	struct list_head	port_list;
	struct net_device	*dev;
	struct hsr_priv		*hsr;
	enum hsr_port_type	type;
};

struct hsr_frame_info;
struct hsr_node;

struct hsr_proto_ops {
	/* format and send supervision frame */
	void (*send_sv_frame)(struct hsr_port *port, unsigned long *interval);
	void (*handle_san_frame)(bool san, enum hsr_port_type port,
				 struct hsr_node *node);
	bool (*drop_frame)(struct hsr_frame_info *frame, struct hsr_port *port);
	struct sk_buff * (*get_untagged_frame)(struct hsr_frame_info *frame,
					       struct hsr_port *port);
	struct sk_buff * (*create_tagged_frame)(struct hsr_frame_info *frame,
						struct hsr_port *port);
	int (*fill_frame_info)(__be16 proto, struct sk_buff *skb,
			       struct hsr_frame_info *frame);
	bool (*invalid_dan_ingress_frame)(__be16 protocol);
	void (*update_san_info)(struct hsr_node *node, bool is_sup);
};

struct hsr_priv {
	struct rcu_head		rcu_head;
	struct list_head	ports;
	struct list_head	node_db;	/* Known HSR nodes */
	struct list_head	self_node_db;	/* MACs of slaves */
	struct timer_list	announce_timer;	/* Supervision frame dispatch */
	struct timer_list	prune_timer;
	int announce_count;
	u16 sequence_nr;
	u16 sup_sequence_nr;	/* For HSRv1 separate seq_nr for supervision */
	enum hsr_version prot_version;	/* Indicate if HSRv0, HSRv1 or PRPv1 */
	spinlock_t seqnr_lock;	/* locking for sequence_nr */
	spinlock_t list_lock;	/* locking for node list */
	struct hsr_proto_ops	*proto_ops;
#define PRP_LAN_ID	0x5     /* 0x1010 for A and 0x1011 for B. Bit 0 is set
				 * based on SLAVE_A or SLAVE_B
				 */
	u8 net_id;		/* for PRP, it occupies most significant 3 bits
				 * of lan_id
				 */
	unsigned char		sup_multicast_addr[ETH_ALEN] __aligned(sizeof(u16));
				/* Align to u16 boundary to avoid unaligned access
				 * in ether_addr_equal
				 */
#ifdef	CONFIG_DEBUG_FS
	struct dentry *node_tbl_root;
#endif
};

#define hsr_for_each_port(hsr, port) \
	list_for_each_entry_rcu((port), &(hsr)->ports, port_list)

struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt);

/* Caller must ensure skb is a valid HSR frame */
static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb)
{
	struct hsr_ethhdr *hsr_ethhdr;

	hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb);
	return ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
}

static inline struct prp_rct *skb_get_PRP_rct(struct sk_buff *skb)
{
	unsigned char *tail = skb_tail_pointer(skb) - HSR_HLEN;

	struct prp_rct *rct = (struct prp_rct *)tail;

	if (rct->PRP_suffix == htons(ETH_P_PRP))
		return rct;

	return NULL;
}

/* Assume caller has confirmed this skb is PRP suffixed */
static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct)
{
	return ntohs(rct->sequence_nr);
}

static inline u16 get_prp_lan_id(struct prp_rct *rct)
{
	return ntohs(rct->lan_id_and_LSDU_size) >> 12;
}

/* assume there is a valid rct */
static inline bool prp_check_lsdu_size(struct sk_buff *skb,
				       struct prp_rct *rct,
				       bool is_sup)
{
	struct ethhdr *ethhdr;
	int expected_lsdu_size;

	if (is_sup) {
		expected_lsdu_size = HSR_V1_SUP_LSDUSIZE;
	} else {
		ethhdr = (struct ethhdr *)skb_mac_header(skb);
		expected_lsdu_size = skb->len - 14;
		if (ethhdr->h_proto == htons(ETH_P_8021Q))
			expected_lsdu_size -= 4;
	}

	return (expected_lsdu_size == get_prp_LSDU_size(rct));
}

#if IS_ENABLED(CONFIG_DEBUG_FS)
void hsr_debugfs_rename(struct net_device *dev);
void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev);
void hsr_debugfs_term(struct hsr_priv *priv);
void hsr_debugfs_create_root(void);
void hsr_debugfs_remove_root(void);
#else
static inline void hsr_debugfs_rename(struct net_device *dev)
{
}
static inline void hsr_debugfs_init(struct hsr_priv *priv,
				    struct net_device *hsr_dev)
{}
static inline void hsr_debugfs_term(struct hsr_priv *priv)
{}
static inline void hsr_debugfs_create_root(void)
{}
static inline void hsr_debugfs_remove_root(void)
{}
#endif

#endif /*  __HSR_PRIVATE_H */
Commit	Line	Data
0e7623bd	1	/* SPDX-License-Identifier: GPL-2.0 */
70ebe4a4	2	/* Copyright 2011-2014 Autronica Fire and Security AS
f421436a AB	3	*
f421436a AB	4	* Author(s):
70ebe4a4	5	* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
8f4c0e01 MK	6	*
8f4c0e01 MK	7	* include file for HSR and PRP.
f421436a AB	8	*/
f421436a AB	9
70ebe4a4 AB	10	#ifndef __HSR_PRIVATE_H
70ebe4a4 AB	11	#define __HSR_PRIVATE_H
f421436a AB	12
	13	#include <linux/netdevice.h>
	14	#include <linux/list.h>
451d8123	15	#include <linux/if_vlan.h>
dcf0cd1c	16	#include <linux/if_hsr.h>
f421436a	17
f421436a AB	18	/* Time constants as specified in the HSR specification (IEC-62439-3 2010)
	19	* Table 8.
	20	* All values in milliseconds.
	21	*/
	22	#define HSR_LIFE_CHECK_INTERVAL 2000 /* ms */
	23	#define HSR_NODE_FORGET_TIME 60000 /* ms */
	24	#define HSR_ANNOUNCE_INTERVAL 100 /* ms */
f1764114	25	#define HSR_ENTRY_FORGET_TIME 400 /* ms */
f421436a	26
f421436a AB	27	/* By how much may slave1 and slave2 timestamps of latest received frame from
	28	* each node differ before we notify of communication problem?
	29	*/
	30	#define MAX_SLAVE_DIFF 3000 /* ms */
f266a683	31	#define HSR_SEQNR_START (USHRT_MAX - 1024)
ee1c2797	32	#define HSR_SUP_SEQNR_START (HSR_SEQNR_START / 2)
f421436a	33
f421436a AB	34	/* How often shall we check for broken ring and remove node entries older than
	35	* HSR_NODE_FORGET_TIME?
	36	*/
	37	#define PRUNE_PERIOD 3000 /* ms */
	38
f421436a AB	39	#define HSR_TLV_ANNOUNCE 22
f421436a AB	40	#define HSR_TLV_LIFE_CHECK 23
c643ff03 MK	41	/* PRP V1 life check for Duplicate discard */
	42	#define PRP_TLV_LIFE_CHECK_DD 20
	43	/* PRP V1 life check for Duplicate Accept */
	44	#define PRP_TLV_LIFE_CHECK_DA 21
f421436a	45
f421436a AB	46	/* HSR Tag.
	47	* As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
	48	* path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
	49	* h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
	50	* encapsulated protocol } instead.
70ebe4a4 AB	51	*
70ebe4a4 AB	52	* Field names as defined in the IEC:2010 standard for HSR.
f421436a	53	*/
f421436a AB	54	struct hsr_tag {
	55	__be16 path_and_LSDU_size;
	56	__be16 sequence_nr;
	57	__be16 encap_proto;
	58	} __packed;
	59
70ebe4a4	60	#define HSR_HLEN 6
f421436a	61
ee1c2797 PH	62	#define HSR_V1_SUP_LSDUSIZE 52
ee1c2797 PH	63
f421436a AB	64	/* The helper functions below assumes that 'path' occupies the 4 most
	65	* significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
	66	* equivalently, the 4 most significant bits of HSR tag byte 14).
	67	*
	68	* This is unclear in the IEC specification; its definition of MAC addresses
	69	* indicates the spec is written with the least significant bit first (to the
	70	* left). This, however, would mean that the LSDU field would be split in two
	71	* with the path field in-between, which seems strange. I'm guessing the MAC
	72	* address definition is in error.
	73	*/
f421436a AB	74
	75	static inline void set_hsr_tag_path(struct hsr_tag *ht, u16 path)
	76	{
d595b85a MK	77	ht->path_and_LSDU_size =
d595b85a MK	78	htons((ntohs(ht->path_and_LSDU_size) & 0x0FFF) \| (path << 12));
f421436a AB	79	}
	80
	81	static inline void set_hsr_tag_LSDU_size(struct hsr_tag *ht, u16 LSDU_size)
	82	{
0525fc06 MK	83	ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) &
0525fc06 MK	84	0xF000) \| (LSDU_size & 0x0FFF));
f421436a AB	85	}
	86
	87	struct hsr_ethhdr {
	88	struct ethhdr ethhdr;
	89	struct hsr_tag hsr_tag;
	90	} __packed;
	91
451d8123 MK	92	struct hsr_vlan_ethhdr {
	93	struct vlan_ethhdr vlanhdr;
	94	struct hsr_tag hsr_tag;
	95	} __packed;
	96
	97	/* HSR/PRP Supervision Frame data types.
f421436a AB	98	* Field names as defined in the IEC:2010 standard for HSR.
	99	*/
	100	struct hsr_sup_tag {
b1b4aa91	101	__be16 path_and_HSR_ver;
f421436a	102	__be16 sequence_nr;
b1b4aa91 MK	103	__u8 HSR_TLV_type;
b1b4aa91 MK	104	__u8 HSR_TLV_length;
f421436a AB	105	} __packed;
	106
	107	struct hsr_sup_payload {
b1b4aa91	108	unsigned char macaddress_A[ETH_ALEN];
f421436a AB	109	} __packed;
f421436a AB	110
f421436a AB	111	static inline void set_hsr_stag_path(struct hsr_sup_tag *hst, u16 path)
f421436a AB	112	{
5fa96778	113	set_hsr_tag_path((struct hsr_tag *)hst, path);
f421436a AB	114	}
f421436a AB	115
b1b4aa91	116	static inline void set_hsr_stag_HSR_ver(struct hsr_sup_tag *hst, u16 HSR_ver)
f421436a	117	{
b1b4aa91	118	set_hsr_tag_LSDU_size((struct hsr_tag *)hst, HSR_ver);
f421436a AB	119	}
f421436a AB	120
ee1c2797 PH	121	struct hsrv0_ethhdr_sp {
	122	struct ethhdr ethhdr;
	123	struct hsr_sup_tag hsr_sup;
	124	} __packed;
	125
	126	struct hsrv1_ethhdr_sp {
f421436a	127	struct ethhdr ethhdr;
ee1c2797	128	struct hsr_tag hsr;
f421436a AB	129	struct hsr_sup_tag hsr_sup;
	130	} __packed;
	131
c5a75911 AB	132	enum hsr_port_type {
	133	HSR_PT_NONE = 0, /* Must be 0, used by framereg */
	134	HSR_PT_SLAVE_A,
	135	HSR_PT_SLAVE_B,
	136	HSR_PT_INTERLINK,
	137	HSR_PT_MASTER,
	138	HSR_PT_PORTS, /* This must be the last item in the enum */
	139	};
	140
c643ff03 MK	141	/* PRP Redunancy Control Trailor (RCT).
	142	* As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr,
	143	* Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }.
	144	*
	145	* Field names as defined in the IEC:2012 standard for PRP.
	146	*/
	147	struct prp_rct {
	148	__be16 sequence_nr;
	149	__be16 lan_id_and_LSDU_size;
	150	__be16 PRP_suffix;
	151	} __packed;
	152
451d8123 MK	153	static inline u16 get_prp_LSDU_size(struct prp_rct *rct)
	154	{
	155	return ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF;
	156	}
	157
	158	static inline void set_prp_lan_id(struct prp_rct *rct, u16 lan_id)
	159	{
	160	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
	161	0x0FFF) \| (lan_id << 12));
	162	}
c643ff03 MK	163	static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size)
	164	{
	165	rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) &
	166	0xF000) \| (LSDU_size & 0x0FFF));
	167	}
	168
c5a75911 AB	169	struct hsr_port {
	170	struct list_head port_list;
	171	struct net_device *dev;
	172	struct hsr_priv *hsr;
	173	enum hsr_port_type type;
f421436a	174	};
f421436a	175
fa4dc895	176	struct hsr_frame_info;
451d8123	177	struct hsr_node;
fa4dc895	178
28e458e0 MK	179	struct hsr_proto_ops {
	180	/* format and send supervision frame */
	181	void (send_sv_frame)(struct hsr_port port, unsigned long *interval);
451d8123 MK	182	void (*handle_san_frame)(bool san, enum hsr_port_type port,
	183	struct hsr_node *node);
	184	bool (drop_frame)(struct hsr_frame_info frame, struct hsr_port *port);
fa4dc895 MK	185	struct sk_buff * (get_untagged_frame)(struct hsr_frame_info frame,
	186	struct hsr_port *port);
	187	struct sk_buff * (create_tagged_frame)(struct hsr_frame_info frame,
	188	struct hsr_port *port);
48b491a5 GM	189	int (fill_frame_info)(__be16 proto, struct sk_buff skb,
48b491a5 GM	190	struct hsr_frame_info *frame);
451d8123 MK	191	bool (*invalid_dan_ingress_frame)(__be16 protocol);
451d8123 MK	192	void (update_san_info)(struct hsr_node node, bool is_sup);
28e458e0 MK	193	};
28e458e0 MK	194
f421436a	195	struct hsr_priv {
f421436a	196	struct rcu_head rcu_head;
c5a75911	197	struct list_head ports;
f266a683	198	struct list_head node_db; /* Known HSR nodes */
f421436a AB	199	struct list_head self_node_db; /* MACs of slaves */
f421436a AB	200	struct timer_list announce_timer; /* Supervision frame dispatch */
abff7162	201	struct timer_list prune_timer;
f421436a AB	202	int announce_count;
f421436a AB	203	u16 sequence_nr;
d595b85a	204	u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */
8f4c0e01	205	enum hsr_version prot_version; /* Indicate if HSRv0, HSRv1 or PRPv1 */
92a35678 TY	206	spinlock_t seqnr_lock; /* locking for sequence_nr */
92a35678 TY	207	spinlock_t list_lock; /* locking for node list */
28e458e0	208	struct hsr_proto_ops *proto_ops;
451d8123 MK	209	#define PRP_LAN_ID 0x5 /* 0x1010 for A and 0x1011 for B. Bit 0 is set
	210	* based on SLAVE_A or SLAVE_B
	211	*/
	212	u8 net_id; /* for PRP, it occupies most significant 3 bits
	213	* of lan_id
	214	*/
6c9f18f2 AO	215	unsigned char sup_multicast_addr[ETH_ALEN] __aligned(sizeof(u16));
	216	/* Align to u16 boundary to avoid unaligned access
	217	* in ether_addr_equal
	218	*/
fc4ecaee MK	219	#ifdef CONFIG_DEBUG_FS
fc4ecaee MK	220	struct dentry *node_tbl_root;
fc4ecaee	221	#endif
f421436a AB	222	};
f421436a AB	223
f266a683 AB	224	#define hsr_for_each_port(hsr, port) \
	225	list_for_each_entry_rcu((port), &(hsr)->ports, port_list)
	226
c5a75911	227	struct hsr_port hsr_port_get_hsr(struct hsr_priv hsr, enum hsr_port_type pt);
f421436a	228
f266a683 AB	229	/* Caller must ensure skb is a valid HSR frame */
	230	static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb)
	231	{
	232	struct hsr_ethhdr *hsr_ethhdr;
	233
5fa96778	234	hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb);
f266a683 AB	235	return ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
	236	}
	237
451d8123 MK	238	static inline struct prp_rct skb_get_PRP_rct(struct sk_buff skb)
	239	{
	240	unsigned char *tail = skb_tail_pointer(skb) - HSR_HLEN;
	241
	242	struct prp_rct rct = (struct prp_rct )tail;
	243
	244	if (rct->PRP_suffix == htons(ETH_P_PRP))
	245	return rct;
	246
	247	return NULL;
	248	}
	249
	250	/* Assume caller has confirmed this skb is PRP suffixed */
	251	static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct)
	252	{
	253	return ntohs(rct->sequence_nr);
	254	}
	255
	256	static inline u16 get_prp_lan_id(struct prp_rct *rct)
	257	{
	258	return ntohs(rct->lan_id_and_LSDU_size) >> 12;
	259	}
	260
	261	/* assume there is a valid rct */
	262	static inline bool prp_check_lsdu_size(struct sk_buff *skb,
	263	struct prp_rct *rct,
	264	bool is_sup)
	265	{
	266	struct ethhdr *ethhdr;
	267	int expected_lsdu_size;
	268
	269	if (is_sup) {
	270	expected_lsdu_size = HSR_V1_SUP_LSDUSIZE;
	271	} else {
	272	ethhdr = (struct ethhdr *)skb_mac_header(skb);
	273	expected_lsdu_size = skb->len - 14;
	274	if (ethhdr->h_proto == htons(ETH_P_8021Q))
	275	expected_lsdu_size -= 4;
	276	}
	277
	278	return (expected_lsdu_size == get_prp_LSDU_size(rct));
	279	}
	280
fc4ecaee	281	#if IS_ENABLED(CONFIG_DEBUG_FS)
4c2d5e33	282	void hsr_debugfs_rename(struct net_device *dev);
1d19e2d5	283	void hsr_debugfs_init(struct hsr_priv priv, struct net_device hsr_dev);
9c5f8a19	284	void hsr_debugfs_term(struct hsr_priv *priv);
c6c4ccd7 TY	285	void hsr_debugfs_create_root(void);
c6c4ccd7 TY	286	void hsr_debugfs_remove_root(void);
fc4ecaee	287	#else
80892772	288	static inline void hsr_debugfs_rename(struct net_device *dev)
4c2d5e33 TY	289	{
4c2d5e33 TY	290	}
1d19e2d5 TY	291	static inline void hsr_debugfs_init(struct hsr_priv *priv,
	292	struct net_device *hsr_dev)
	293	{}
9c5f8a19	294	static inline void hsr_debugfs_term(struct hsr_priv *priv)
fc4ecaee	295	{}
c6c4ccd7 TY	296	static inline void hsr_debugfs_create_root(void)
	297	{}
	298	static inline void hsr_debugfs_remove_root(void)
	299	{}
fc4ecaee MK	300	#endif
fc4ecaee MK	301
70ebe4a4	302	#endif /* __HSR_PRIVATE_H */