2 * net/tipc/bearer.h: Include file for TIPC bearer code
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5 * Copyright (c) 2005, 2010-2011, Wind River Systems
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37 #ifndef _TIPC_BEARER_H
38 #define _TIPC_BEARER_H
46 * Identifiers associated with TIPC message header media address info
48 * - address info field is 20 bytes long
49 * - media type identifier located at offset 3
50 * - remaining bytes vary according to media type
52 #define TIPC_MEDIA_ADDR_SIZE 20
53 #define TIPC_MEDIA_TYPE_OFFSET 3
56 * Identifiers of supported TIPC media types
58 #define TIPC_MEDIA_TYPE_ETH 1
59 #define TIPC_MEDIA_TYPE_IB 2
62 * struct tipc_media_addr - destination address used by TIPC bearers
63 * @value: address info (format defined by media)
64 * @media_id: TIPC media type identifier
65 * @broadcast: non-zero if address is a broadcast address
67 struct tipc_media_addr {
68 u8 value[TIPC_MEDIA_ADDR_SIZE];
76 * struct tipc_media - TIPC media information available to internal users
77 * @send_msg: routine which handles buffer transmission
78 * @enable_bearer: routine which enables a bearer
79 * @disable_bearer: routine which disables a bearer
80 * @addr2str: routine which converts media address to string
81 * @addr2msg: routine which converts media address to protocol message area
82 * @msg2addr: routine which converts media address from protocol message area
83 * @bcast_addr: media address used in broadcasting
84 * @priority: default link (and bearer) priority
85 * @tolerance: default time (in ms) before declaring link failure
86 * @window: default window (in packets) before declaring link congestion
87 * @type_id: TIPC media identifier
91 int (*send_msg)(struct sk_buff *buf,
92 struct tipc_bearer *b_ptr,
93 struct tipc_media_addr *dest);
94 int (*enable_bearer)(struct tipc_bearer *b_ptr);
95 void (*disable_bearer)(struct tipc_bearer *b_ptr);
96 int (*addr2str)(struct tipc_media_addr *a, char *str_buf, int str_size);
97 int (*addr2msg)(struct tipc_media_addr *a, char *msg_area);
98 int (*msg2addr)(const struct tipc_bearer *b_ptr,
99 struct tipc_media_addr *a, char *msg_area);
104 char name[TIPC_MAX_MEDIA_NAME];
108 * struct tipc_bearer - TIPC bearer structure
109 * @usr_handle: pointer to additional media-specific information about bearer
110 * @mtu: max packet size bearer can support
111 * @blocked: non-zero if bearer is blocked
112 * @lock: spinlock for controlling access to bearer
113 * @addr: media-specific address associated with bearer
114 * @name: bearer name (format = media:interface)
115 * @media: ptr to media structure associated with bearer
116 * @priority: default link priority for bearer
117 * @window: default window size for bearer
118 * @tolerance: default link tolerance for bearer
119 * @identity: array index of this bearer within TIPC bearer array
120 * @link_req: ptr to (optional) structure making periodic link setup requests
121 * @links: list of non-congested links associated with bearer
122 * @active: non-zero if bearer structure is represents a bearer
123 * @net_plane: network plane ('A' through 'H') currently associated with bearer
124 * @nodes: indicates which nodes in cluster can be reached through bearer
126 * Note: media-specific code is responsible for initialization of the fields
127 * indicated below when a bearer is enabled; TIPC's generic bearer code takes
128 * care of initializing all other fields.
131 void *usr_handle; /* initalized by media */
132 u32 mtu; /* initalized by media */
133 int blocked; /* initalized by media */
134 struct tipc_media_addr addr; /* initalized by media */
135 char name[TIPC_MAX_BEARER_NAME];
137 struct tipc_media *media;
138 struct tipc_media_addr bcast_addr;
143 struct tipc_link_req *link_req;
144 struct list_head links;
147 struct tipc_node_map nodes;
150 struct tipc_bearer_names {
151 char media_name[TIPC_MAX_MEDIA_NAME];
152 char if_name[TIPC_MAX_IF_NAME];
157 extern struct tipc_bearer tipc_bearers[];
160 * TIPC routines available to supported media types
162 int tipc_register_media(struct tipc_media *m_ptr);
164 void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr);
166 int tipc_block_bearer(const char *name);
167 void tipc_continue(struct tipc_bearer *tb_ptr);
169 int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority);
170 int tipc_disable_bearer(const char *name);
173 * Routines made available to TIPC by supported media types
175 int tipc_eth_media_start(void);
176 void tipc_eth_media_stop(void);
178 #ifdef CONFIG_TIPC_MEDIA_IB
179 int tipc_ib_media_start(void);
180 void tipc_ib_media_stop(void);
182 static inline int tipc_ib_media_start(void) { return 0; }
183 static inline void tipc_ib_media_stop(void) { return; }
186 int tipc_media_set_priority(const char *name, u32 new_value);
187 int tipc_media_set_window(const char *name, u32 new_value);
188 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
189 struct sk_buff *tipc_media_get_names(void);
191 struct sk_buff *tipc_bearer_get_names(void);
192 void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest);
193 void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest);
194 struct tipc_bearer *tipc_bearer_find(const char *name);
195 struct tipc_bearer *tipc_bearer_find_interface(const char *if_name);
196 struct tipc_media *tipc_media_find(const char *name);
197 int tipc_bearer_blocked(struct tipc_bearer *b_ptr);
198 void tipc_bearer_stop(void);
201 * tipc_bearer_send- sends buffer to destination over bearer
204 * The media send routine must not alter the buffer being passed in
205 * as it may be needed for later retransmission!
207 static inline void tipc_bearer_send(struct tipc_bearer *b, struct sk_buff *buf,
208 struct tipc_media_addr *dest)
210 b->media->send_msg(buf, b, dest);
213 #endif /* _TIPC_BEARER_H */