linux/net/hsr/hsr_framereg.h
Juhee Kang a0b92e0514 net: hsr: fix hsr build error when lockdep is not enabled
In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check().
But if lockdep is not enabled, lockdep_is_held() causes a build error:

    ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined!

Thus, this patch solved by adding lockdep_hsr_is_held(). This helper
function calls the lockdep_is_held() when lockdep is enabled, and returns 1
if not defined.

Fixes: e7f2742068 ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-21 20:43:10 -08:00

95 lines
2.7 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_FRAMEREG_H
#define __HSR_FRAMEREG_H
#include "hsr_main.h"
struct hsr_node;
struct hsr_frame_info {
struct sk_buff *skb_std;
struct sk_buff *skb_hsr;
struct sk_buff *skb_prp;
struct hsr_port *port_rcv;
struct hsr_node *node_src;
u16 sequence_nr;
bool is_supervision;
bool is_vlan;
bool is_local_dest;
bool is_local_exclusive;
bool is_from_san;
};
#ifdef CONFIG_LOCKDEP
int lockdep_hsr_is_held(spinlock_t *lock);
#else
#define lockdep_hsr_is_held(lock) 1
#endif
u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr);
struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock);
void hsr_del_self_node(struct hsr_priv *hsr);
void hsr_del_nodes(struct hlist_head *node_db);
struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
struct sk_buff *skb, bool is_sup,
enum hsr_port_type rx_port);
void hsr_handle_sup_frame(struct hsr_frame_info *frame);
bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr);
void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb);
void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
struct hsr_port *port);
void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
u16 sequence_nr);
int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
u16 sequence_nr);
void hsr_prune_nodes(struct timer_list *t);
int hsr_create_self_node(struct hsr_priv *hsr,
const unsigned char addr_a[ETH_ALEN],
const unsigned char addr_b[ETH_ALEN]);
void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
unsigned char addr[ETH_ALEN]);
int hsr_get_node_data(struct hsr_priv *hsr,
const unsigned char *addr,
unsigned char addr_b[ETH_ALEN],
unsigned int *addr_b_ifindex,
int *if1_age,
u16 *if1_seq,
int *if2_age,
u16 *if2_seq);
void prp_handle_san_frame(bool san, enum hsr_port_type port,
struct hsr_node *node);
void prp_update_san_info(struct hsr_node *node, bool is_sup);
struct hsr_node {
struct hlist_node mac_list;
unsigned char macaddress_A[ETH_ALEN];
unsigned char macaddress_B[ETH_ALEN];
/* Local slave through which AddrB frames are received from this node */
enum hsr_port_type addr_B_port;
unsigned long time_in[HSR_PT_PORTS];
bool time_in_stale[HSR_PT_PORTS];
unsigned long time_out[HSR_PT_PORTS];
/* if the node is a SAN */
bool san_a;
bool san_b;
u16 seq_out[HSR_PT_PORTS];
struct rcu_head rcu_head;
};
#endif /* __HSR_FRAMEREG_H */