294 lines
8.3 KiB
C
294 lines
8.3 KiB
C
/* 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_EOT 0 /* End of TLVs */
|
|
#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
|
|
/* PRP V1 life redundancy box MAC address */
|
|
#define PRP_TLV_REDBOX_MAC 30
|
|
|
|
#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;
|
|
|
|
struct hsr_sup_tlv {
|
|
u8 HSR_TLV_type;
|
|
u8 HSR_TLV_length;
|
|
};
|
|
|
|
/* 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;
|
|
struct hsr_sup_tlv tlv;
|
|
} __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_self_node {
|
|
unsigned char macaddress_A[ETH_ALEN];
|
|
unsigned char macaddress_B[ETH_ALEN];
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
struct hsr_priv {
|
|
struct rcu_head rcu_head;
|
|
struct list_head ports;
|
|
struct list_head node_db; /* Known HSR nodes */
|
|
struct hsr_self_node __rcu *self_node; /* 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);
|
|
}
|
|
|
|
/* 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 */
|