1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * MCTP per-net structures 4 */ 5 6 #ifndef __NETNS_MCTP_H__ 7 #define __NETNS_MCTP_H__ 8 9 #include <linux/hash.h> 10 #include <linux/hashtable.h> 11 #include <linux/mutex.h> 12 #include <linux/types.h> 13 14 #define MCTP_BINDS_BITS 7 15 16 struct netns_mctp { 17 /* Only updated under RTNL, entries freed via RCU */ 18 struct list_head routes; 19 20 /* Bound sockets: hash table of sockets, keyed by 21 * (type, src_eid, dest_eid). 22 * Specific src_eid/dest_eid entries also have an entry for 23 * MCTP_ADDR_ANY. This list is updated from non-atomic contexts 24 * (under bind_lock), and read (under rcu) in packet rx. 25 */ 26 struct mutex bind_lock; 27 DECLARE_HASHTABLE(binds, MCTP_BINDS_BITS); 28 29 /* tag allocations. This list is read and updated from atomic contexts, 30 * but elements are free()ed after a RCU grace-period 31 */ 32 spinlock_t keys_lock; 33 struct hlist_head keys; 34 35 /* MCTP network */ 36 unsigned int default_net; 37 38 /* neighbour table */ 39 struct mutex neigh_lock; 40 struct list_head neighbours; 41 }; 42 43 static inline u32 mctp_bind_hash(u8 type, u8 local_addr, u8 peer_addr) 44 { 45 return hash_32(type | (u32)local_addr << 8 | (u32)peer_addr << 16, 46 MCTP_BINDS_BITS); 47 } 48 49 #endif /* __NETNS_MCTP_H__ */ 50