1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Management Component Transport Protocol (MCTP) - device 4 * definitions. 5 * 6 * Copyright (c) 2021 Code Construct 7 * Copyright (c) 2021 Google 8 */ 9 10 #ifndef __NET_MCTPDEVICE_H 11 #define __NET_MCTPDEVICE_H 12 13 #include <linux/list.h> 14 #include <linux/types.h> 15 #include <linux/refcount.h> 16 17 struct mctp_sk_key; 18 19 struct mctp_dev { 20 struct net_device *dev; 21 22 refcount_t refs; 23 24 unsigned int net; 25 26 const struct mctp_netdev_ops *ops; 27 28 /* Only modified under RTNL. Reads have addrs_lock held */ 29 u8 *addrs; 30 size_t num_addrs; 31 spinlock_t addrs_lock; 32 33 struct rcu_head rcu; 34 }; 35 36 struct mctp_netdev_ops { 37 void (*release_flow)(struct mctp_dev *dev, 38 struct mctp_sk_key *key); 39 }; 40 41 #define MCTP_INITIAL_DEFAULT_NET 1 42 43 struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev); 44 struct mctp_dev *__mctp_dev_get(const struct net_device *dev); 45 46 int mctp_register_netdev(struct net_device *dev, 47 const struct mctp_netdev_ops *ops); 48 void mctp_unregister_netdev(struct net_device *dev); 49 50 void mctp_dev_hold(struct mctp_dev *mdev); 51 void mctp_dev_put(struct mctp_dev *mdev); 52 53 void mctp_dev_set_key(struct mctp_dev *dev, struct mctp_sk_key *key); 54 void mctp_dev_release_key(struct mctp_dev *dev, struct mctp_sk_key *key); 55 56 #endif /* __NET_MCTPDEVICE_H */ 57