*/
#define INVALID_LINK_SEQ 0x10000
-/* Link working states
+/* Link FSM events:
*/
-#define WORKING_WORKING 560810u
-#define WORKING_UNKNOWN 560811u
-#define RESET_UNKNOWN 560812u
-#define RESET_RESET 560813u
+enum {
+ LINK_ESTABLISH_EVT = 0xec1ab1e,
+ LINK_PEER_RESET_EVT = 0x9eed0e,
+ LINK_FAILURE_EVT = 0xfa110e,
+ LINK_RESET_EVT = 0x10ca1d0e,
+ LINK_FAILOVER_BEGIN_EVT = 0xfa110bee,
+ LINK_FAILOVER_END_EVT = 0xfa110ede,
+ LINK_SYNCH_BEGIN_EVT = 0xc1ccbee,
+ LINK_SYNCH_END_EVT = 0xc1ccede
+};
-/* Link endpoint execution states
+/* Events returned from link at packet reception or at timeout
*/
-#define LINK_STARTED 0x0001
-#define LINK_STOPPED 0x0002
-#define LINK_SYNCHING 0x0004
-#define LINK_FAILINGOVER 0x0008
+enum {
+ TIPC_LINK_UP_EVT = 1,
+ TIPC_LINK_DOWN_EVT = (1 << 1),
+ TIPC_LINK_SND_BC_ACK = (1 << 2)
+};
/* Starting value for maximum packet size negotiation on unicast links
* (unless bearer MTU is less)
* @name: link name character string
* @media_addr: media address to use when sending messages over link
* @timer: link timer
- * @owner: pointer to peer node
+ * @net: pointer to namespace struct
* @refcnt: reference counter for permanent references (owner node & timer)
- * @flags: execution state flags for link endpoint instance
- * @checkpoint: reference point for triggering link continuity checking
* @peer_session: link session # being used by peer end of link
* @peer_bearer_id: bearer id used by link's peer endpoint
* @bearer_id: local bearer id used by link
* @tolerance: minimum link continuity loss needed to reset link [in ms]
- * @cont_intv: link continuity testing interval
+ * @keepalive_intv: link keepalive timer interval
* @abort_limit: # of unacknowledged continuity probes needed to reset link
* @state: current state of link FSM
- * @fsm_msg_cnt: # of protocol messages link FSM has sent in current state
+ * @peer_caps: bitmap describing capabilities of peer node
+ * @silent_intv_cnt: # of timer intervals without any reception from peer
* @proto_msg: template for control messages generated by link
* @pmsg: convenience pointer to "proto_msg" field
* @priority: current link priority
* @net_plane: current link network plane ('A' through 'H')
* @backlog_limit: backlog queue congestion thresholds (indexed by importance)
* @exp_msg_count: # of tunnelled messages expected during link changeover
- * @reset_checkpoint: seq # of last acknowledged message at time of link reset
+ * @reset_rcv_checkpt: seq # of last acknowledged message at time of link reset
* @mtu: current maximum packet size for this link
* @advertised_mtu: advertised own mtu when link is being established
* @transmitq: queue for sent, non-acked messages
* @backlogq: queue for messages waiting to be sent
- * @next_out_no: next sequence number to use for outbound messages
+ * @snt_nxt: next sequence number to use for outbound messages
* @last_retransmitted: sequence number of most recently retransmitted message
* @stale_count: # of identical retransmit requests made by peer
- * @next_in_no: next sequence number to expect for inbound messages
+ * @ackers: # of peers that needs to ack each packet before it can be released
+ * @acked: # last packet acked by a certain peer. Used for broadcast.
+ * @rcv_nxt: next sequence number to expect for inbound messages
* @deferred_queue: deferred queue saved OOS b'cast message received from node
* @unacked_window: # of inbound messages rx'd without ack'ing back to peer
* @inputq: buffer queue for messages to be delivered upwards
* @wakeupq: linked list of wakeup msgs waiting for link congestion to abate
* @long_msg_seq_no: next identifier to use for outbound fragmented messages
* @reasm_buf: head of partially reassembled inbound message fragments
+ * @bc_rcvr: marks that this is a broadcast receiver link
* @stats: collects statistics regarding link activity
*/
struct tipc_link {
u32 addr;
char name[TIPC_MAX_LINK_NAME];
- struct tipc_media_addr media_addr;
- struct timer_list timer;
- struct tipc_node *owner;
- struct kref ref;
+ struct tipc_media_addr *media_addr;
+ struct net *net;
/* Management and link supervision data */
- unsigned int flags;
- u32 checkpoint;
u32 peer_session;
u32 peer_bearer_id;
u32 bearer_id;
u32 tolerance;
- unsigned long cont_intv;
+ unsigned long keepalive_intv;
u32 abort_limit;
- int state;
- u32 fsm_msg_cnt;
+ u32 state;
+ u16 peer_caps;
+ bool active;
+ u32 silent_intv_cnt;
struct {
unchar hdr[INT_H_SIZE];
unchar body[TIPC_MAX_IF_NAME];
struct tipc_msg *pmsg;
u32 priority;
char net_plane;
- u16 synch_point;
- /* Failover */
- u16 failover_pkts;
- u16 failover_checkpt;
- struct sk_buff *failover_skb;
+ /* Failover/synch */
+ u16 drop_point;
+ struct sk_buff *failover_reasm_skb;
/* Max packet negotiation */
u16 mtu;
u16 len;
u16 limit;
} backlog[5];
- u32 next_out_no;
- u32 window;
- u32 last_retransmitted;
+ u16 snd_nxt;
+ u16 last_retransm;
+ u16 window;
u32 stale_count;
/* Reception */
- u32 next_in_no;
+ u16 rcv_nxt;
u32 rcv_unacked;
struct sk_buff_head deferdq;
- struct sk_buff_head inputq;
- struct sk_buff_head namedq;
+ struct sk_buff_head *inputq;
+ struct sk_buff_head *namedq;
/* Congestion handling */
struct sk_buff_head wakeupq;
/* Fragmentation/reassembly */
struct sk_buff *reasm_buf;
+ /* Broadcast */
+ u16 ackers;
+ u16 acked;
+ struct tipc_link *bc_rcvlink;
+ struct tipc_link *bc_sndlink;
+ int nack_state;
+ bool bc_peer_is_up;
+
/* Statistics */
struct tipc_stats stats;
};
-struct tipc_port;
-
-struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
- struct tipc_bearer *b_ptr,
- const struct tipc_media_addr *media_addr);
-void tipc_link_delete(struct tipc_link *link);
-void tipc_link_delete_list(struct net *net, unsigned int bearer_id,
- bool shutting_down);
-void tipc_link_failover_send_queue(struct tipc_link *l_ptr);
-void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, struct tipc_link *dest);
+bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
+ int tolerance, char net_plane, u32 mtu, int priority,
+ int window, u32 session, u32 ownnode, u32 peer,
+ u16 peer_caps,
+ struct tipc_link *bc_sndlink,
+ struct tipc_link *bc_rcvlink,
+ struct sk_buff_head *inputq,
+ struct sk_buff_head *namedq,
+ struct tipc_link **link);
+bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer,
+ int mtu, int window, u16 peer_caps,
+ struct sk_buff_head *inputq,
+ struct sk_buff_head *namedq,
+ struct tipc_link *bc_sndlink,
+ struct tipc_link **link);
+void tipc_link_tnl_prepare(struct tipc_link *l, struct tipc_link *tnl,
+ int mtyp, struct sk_buff_head *xmitq);
+void tipc_link_build_reset_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
+int tipc_link_fsm_evt(struct tipc_link *l, int evt);
void tipc_link_reset_fragments(struct tipc_link *l_ptr);
-int tipc_link_is_up(struct tipc_link *l_ptr);
-int tipc_link_is_active(struct tipc_link *l_ptr);
-void tipc_link_purge_queues(struct tipc_link *l_ptr);
-void tipc_link_reset_all(struct tipc_node *node);
+bool tipc_link_is_up(struct tipc_link *l);
+bool tipc_link_peer_is_down(struct tipc_link *l);
+bool tipc_link_is_reset(struct tipc_link *l);
+bool tipc_link_is_establishing(struct tipc_link *l);
+bool tipc_link_is_synching(struct tipc_link *l);
+bool tipc_link_is_failingover(struct tipc_link *l);
+bool tipc_link_is_blocked(struct tipc_link *l);
+void tipc_link_set_active(struct tipc_link *l, bool active);
void tipc_link_reset(struct tipc_link *l_ptr);
-void tipc_link_reset_list(struct net *net, unsigned int bearer_id);
-int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,
- u32 selector);
-int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dest,
- u32 selector);
-int __tipc_link_xmit(struct net *net, struct tipc_link *link,
- struct sk_buff_head *list);
-void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int prob,
- u32 gap, u32 tolerance, u32 priority);
-void tipc_link_push_packets(struct tipc_link *l_ptr);
-u32 tipc_link_defer_pkt(struct sk_buff_head *list, struct sk_buff *buf);
-void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window);
-void tipc_link_retransmit(struct tipc_link *l_ptr,
- struct sk_buff *start, u32 retransmits);
-struct sk_buff *tipc_skb_queue_next(const struct sk_buff_head *list,
- const struct sk_buff *skb);
+int tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list,
+ struct sk_buff_head *xmitq);
+void tipc_link_set_queue_limits(struct tipc_link *l, u32 window);
int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
-void link_prepare_wakeup(struct tipc_link *l);
-
-/*
- * Link sequence number manipulation routines (uses modulo 2**16 arithmetic)
- */
-static inline u32 buf_seqno(struct sk_buff *buf)
-{
- return msg_seqno(buf_msg(buf));
-}
-
-static inline u32 mod(u32 x)
-{
- return x & 0xffffu;
-}
-
-static inline int less_eq(u32 left, u32 right)
-{
- return mod(right - left) < 32768u;
-}
-
-static inline int more(u32 left, u32 right)
-{
- return !less_eq(left, right);
-}
-
-static inline int less(u32 left, u32 right)
-{
- return less_eq(left, right) && (mod(right) != mod(left));
-}
-
-static inline u32 lesser(u32 left, u32 right)
-{
- return less_eq(left, right) ? left : right;
-}
-
-static inline u32 link_own_addr(struct tipc_link *l)
-{
- return msg_prevnode(l->pmsg);
-}
-
-/*
- * Link status checking routines
- */
-static inline int link_working_working(struct tipc_link *l_ptr)
-{
- return l_ptr->state == WORKING_WORKING;
-}
-
-static inline int link_working_unknown(struct tipc_link *l_ptr)
-{
- return l_ptr->state == WORKING_UNKNOWN;
-}
-
-static inline int link_reset_unknown(struct tipc_link *l_ptr)
-{
- return l_ptr->state == RESET_UNKNOWN;
-}
-
-static inline int link_reset_reset(struct tipc_link *l_ptr)
-{
- return l_ptr->state == RESET_RESET;
-}
-
+int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq);
+int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,
+ struct sk_buff_head *xmitq);
+int tipc_link_build_ack_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
+void tipc_link_add_bc_peer(struct tipc_link *snd_l,
+ struct tipc_link *uc_l,
+ struct sk_buff_head *xmitq);
+void tipc_link_remove_bc_peer(struct tipc_link *snd_l,
+ struct tipc_link *rcv_l,
+ struct sk_buff_head *xmitq);
+int tipc_link_bc_peers(struct tipc_link *l);
+void tipc_link_set_mtu(struct tipc_link *l, int mtu);
+int tipc_link_mtu(struct tipc_link *l);
+void tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked,
+ struct sk_buff_head *xmitq);
+void tipc_link_build_bc_sync_msg(struct tipc_link *l,
+ struct sk_buff_head *xmitq);
+void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr);
+void tipc_link_bc_sync_rcv(struct tipc_link *l, struct tipc_msg *hdr,
+ struct sk_buff_head *xmitq);
+int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb,
+ struct sk_buff_head *xmitq);
#endif
Code Review / kvmfornfv.git / blobdiff