Lines Matching refs:l
234 static int link_is_up(struct tipc_link *l) in link_is_up() argument
236 return l->state & (LINK_ESTABLISHED | LINK_SYNCHING); in link_is_up()
239 static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
241 static void tipc_link_build_proto_msg(struct tipc_link *l, int mtyp, bool probe,
245 static void link_print(struct tipc_link *l, const char *str);
246 static int tipc_link_build_nack_msg(struct tipc_link *l,
248 static void tipc_link_build_bc_init_msg(struct tipc_link *l,
250 static bool tipc_link_release_pkts(struct tipc_link *l, u16 to);
255 bool tipc_link_is_up(struct tipc_link *l) in tipc_link_is_up() argument
257 return link_is_up(l); in tipc_link_is_up()
260 bool tipc_link_peer_is_down(struct tipc_link *l) in tipc_link_peer_is_down() argument
262 return l->state == LINK_PEER_RESET; in tipc_link_peer_is_down()
265 bool tipc_link_is_reset(struct tipc_link *l) in tipc_link_is_reset() argument
267 return l->state & (LINK_RESET | LINK_FAILINGOVER | LINK_ESTABLISHING); in tipc_link_is_reset()
270 bool tipc_link_is_establishing(struct tipc_link *l) in tipc_link_is_establishing() argument
272 return l->state == LINK_ESTABLISHING; in tipc_link_is_establishing()
275 bool tipc_link_is_synching(struct tipc_link *l) in tipc_link_is_synching() argument
277 return l->state == LINK_SYNCHING; in tipc_link_is_synching()
280 bool tipc_link_is_failingover(struct tipc_link *l) in tipc_link_is_failingover() argument
282 return l->state == LINK_FAILINGOVER; in tipc_link_is_failingover()
285 bool tipc_link_is_blocked(struct tipc_link *l) in tipc_link_is_blocked() argument
287 return l->state & (LINK_RESETTING | LINK_PEER_RESET | LINK_FAILINGOVER); in tipc_link_is_blocked()
290 static bool link_is_bc_sndlink(struct tipc_link *l) in link_is_bc_sndlink() argument
292 return !l->bc_sndlink; in link_is_bc_sndlink()
295 static bool link_is_bc_rcvlink(struct tipc_link *l) in link_is_bc_rcvlink() argument
297 return ((l->bc_rcvlink == l) && !link_is_bc_sndlink(l)); in link_is_bc_rcvlink()
300 void tipc_link_set_active(struct tipc_link *l, bool active) in tipc_link_set_active() argument
302 l->active = active; in tipc_link_set_active()
305 u32 tipc_link_id(struct tipc_link *l) in tipc_link_id() argument
307 return l->peer_bearer_id << 16 | l->bearer_id; in tipc_link_id()
310 int tipc_link_window(struct tipc_link *l) in tipc_link_window() argument
312 return l->window; in tipc_link_window()
315 int tipc_link_prio(struct tipc_link *l) in tipc_link_prio() argument
317 return l->priority; in tipc_link_prio()
320 unsigned long tipc_link_tolerance(struct tipc_link *l) in tipc_link_tolerance() argument
322 return l->tolerance; in tipc_link_tolerance()
325 struct sk_buff_head *tipc_link_inputq(struct tipc_link *l) in tipc_link_inputq() argument
327 return l->inputq; in tipc_link_inputq()
330 char tipc_link_plane(struct tipc_link *l) in tipc_link_plane() argument
332 return l->net_plane; in tipc_link_plane()
335 void tipc_link_update_caps(struct tipc_link *l, u16 capabilities) in tipc_link_update_caps() argument
337 l->peer_caps = capabilities; in tipc_link_update_caps()
371 int tipc_link_bc_peers(struct tipc_link *l) in tipc_link_bc_peers() argument
373 return l->ackers; in tipc_link_bc_peers()
376 static u16 link_bc_rcv_gap(struct tipc_link *l) in link_bc_rcv_gap() argument
378 struct sk_buff *skb = skb_peek(&l->deferdq); in link_bc_rcv_gap()
381 if (more(l->snd_nxt, l->rcv_nxt)) in link_bc_rcv_gap()
382 gap = l->snd_nxt - l->rcv_nxt; in link_bc_rcv_gap()
384 gap = buf_seqno(skb) - l->rcv_nxt; in link_bc_rcv_gap()
388 void tipc_link_set_mtu(struct tipc_link *l, int mtu) in tipc_link_set_mtu() argument
390 l->mtu = mtu; in tipc_link_set_mtu()
393 int tipc_link_mtu(struct tipc_link *l) in tipc_link_mtu() argument
395 return l->mtu; in tipc_link_mtu()
398 u16 tipc_link_rcv_nxt(struct tipc_link *l) in tipc_link_rcv_nxt() argument
400 return l->rcv_nxt; in tipc_link_rcv_nxt()
403 u16 tipc_link_acked(struct tipc_link *l) in tipc_link_acked() argument
405 return l->acked; in tipc_link_acked()
408 char *tipc_link_name(struct tipc_link *l) in tipc_link_name() argument
410 return l->name; in tipc_link_name()
413 u32 tipc_link_state(struct tipc_link *l) in tipc_link_state() argument
415 return l->state; in tipc_link_state()
452 struct tipc_link *l; in tipc_link_create() local
454 l = kzalloc(sizeof(*l), GFP_ATOMIC); in tipc_link_create()
455 if (!l) in tipc_link_create()
457 *link = l; in tipc_link_create()
458 l->session = session; in tipc_link_create()
470 snprintf(l->name, sizeof(l->name), "%s:%s-%s:unknown", in tipc_link_create()
473 strcpy(l->if_name, if_name); in tipc_link_create()
474 l->addr = peer; in tipc_link_create()
475 l->peer_caps = peer_caps; in tipc_link_create()
476 l->net = net; in tipc_link_create()
477 l->in_session = false; in tipc_link_create()
478 l->bearer_id = bearer_id; in tipc_link_create()
479 l->tolerance = tolerance; in tipc_link_create()
482 l->net_plane = net_plane; in tipc_link_create()
483 l->advertised_mtu = mtu; in tipc_link_create()
484 l->mtu = mtu; in tipc_link_create()
485 l->priority = priority; in tipc_link_create()
486 tipc_link_set_queue_limits(l, window); in tipc_link_create()
487 l->ackers = 1; in tipc_link_create()
488 l->bc_sndlink = bc_sndlink; in tipc_link_create()
489 l->bc_rcvlink = bc_rcvlink; in tipc_link_create()
490 l->inputq = inputq; in tipc_link_create()
491 l->namedq = namedq; in tipc_link_create()
492 l->state = LINK_RESETTING; in tipc_link_create()
493 __skb_queue_head_init(&l->transmq); in tipc_link_create()
494 __skb_queue_head_init(&l->backlogq); in tipc_link_create()
495 __skb_queue_head_init(&l->deferdq); in tipc_link_create()
496 skb_queue_head_init(&l->wakeupq); in tipc_link_create()
497 skb_queue_head_init(l->inputq); in tipc_link_create()
519 struct tipc_link *l; in tipc_link_bc_create() local
526 l = *link; in tipc_link_bc_create()
527 strcpy(l->name, tipc_bclink_name); in tipc_link_bc_create()
528 tipc_link_reset(l); in tipc_link_bc_create()
529 l->state = LINK_RESET; in tipc_link_bc_create()
530 l->ackers = 0; in tipc_link_bc_create()
531 l->bc_rcvlink = l; in tipc_link_bc_create()
534 if (link_is_bc_sndlink(l)) in tipc_link_bc_create()
535 l->state = LINK_ESTABLISHED; in tipc_link_bc_create()
538 if (link_is_bc_rcvlink(l) && !(peer_caps & TIPC_BCAST_RCAST)) in tipc_link_bc_create()
549 int tipc_link_fsm_evt(struct tipc_link *l, int evt) in tipc_link_fsm_evt() argument
553 switch (l->state) { in tipc_link_fsm_evt()
557 l->state = LINK_PEER_RESET; in tipc_link_fsm_evt()
560 l->state = LINK_RESET; in tipc_link_fsm_evt()
575 l->state = LINK_ESTABLISHING; in tipc_link_fsm_evt()
578 l->state = LINK_FAILINGOVER; in tipc_link_fsm_evt()
593 l->state = LINK_ESTABLISHING; in tipc_link_fsm_evt()
610 l->state = LINK_RESET; in tipc_link_fsm_evt()
627 l->state = LINK_ESTABLISHED; in tipc_link_fsm_evt()
630 l->state = LINK_FAILINGOVER; in tipc_link_fsm_evt()
633 l->state = LINK_RESET; in tipc_link_fsm_evt()
648 l->state = LINK_PEER_RESET; in tipc_link_fsm_evt()
652 l->state = LINK_RESETTING; in tipc_link_fsm_evt()
656 l->state = LINK_RESET; in tipc_link_fsm_evt()
662 l->state = LINK_SYNCHING; in tipc_link_fsm_evt()
673 l->state = LINK_PEER_RESET; in tipc_link_fsm_evt()
677 l->state = LINK_RESETTING; in tipc_link_fsm_evt()
681 l->state = LINK_RESET; in tipc_link_fsm_evt()
687 l->state = LINK_ESTABLISHED; in tipc_link_fsm_evt()
696 pr_err("Unknown FSM state %x in %s\n", l->state, l->name); in tipc_link_fsm_evt()
701 evt, l->state, l->name); in tipc_link_fsm_evt()
707 static void link_profile_stats(struct tipc_link *l) in link_profile_stats() argument
714 l->stats.accu_queue_sz += skb_queue_len(&l->transmq); in link_profile_stats()
715 l->stats.queue_sz_counts++; in link_profile_stats()
717 skb = skb_peek(&l->transmq); in link_profile_stats()
728 l->stats.msg_lengths_total += length; in link_profile_stats()
729 l->stats.msg_length_counts++; in link_profile_stats()
731 l->stats.msg_length_profile[0]++; in link_profile_stats()
733 l->stats.msg_length_profile[1]++; in link_profile_stats()
735 l->stats.msg_length_profile[2]++; in link_profile_stats()
737 l->stats.msg_length_profile[3]++; in link_profile_stats()
739 l->stats.msg_length_profile[4]++; in link_profile_stats()
741 l->stats.msg_length_profile[5]++; in link_profile_stats()
743 l->stats.msg_length_profile[6]++; in link_profile_stats()
748 int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq) in tipc_link_timeout() argument
755 u16 bc_snt = l->bc_sndlink->snd_nxt - 1; in tipc_link_timeout()
756 u16 bc_acked = l->bc_rcvlink->acked; in tipc_link_timeout()
757 struct tipc_mon_state *mstate = &l->mon_state; in tipc_link_timeout()
759 switch (l->state) { in tipc_link_timeout()
763 link_profile_stats(l); in tipc_link_timeout()
764 tipc_mon_get_state(l->net, l->addr, mstate, l->bearer_id); in tipc_link_timeout()
765 if (mstate->reset || (l->silent_intv_cnt > l->abort_limit)) in tipc_link_timeout()
766 return tipc_link_fsm_evt(l, LINK_FAILURE_EVT); in tipc_link_timeout()
768 state |= l->bc_rcvlink->rcv_unacked; in tipc_link_timeout()
769 state |= l->rcv_unacked; in tipc_link_timeout()
770 state |= !skb_queue_empty(&l->transmq); in tipc_link_timeout()
771 state |= !skb_queue_empty(&l->deferdq); in tipc_link_timeout()
773 probe |= l->silent_intv_cnt; in tipc_link_timeout()
775 l->silent_intv_cnt++; in tipc_link_timeout()
778 setup = l->rst_cnt++ <= 4; in tipc_link_timeout()
779 setup |= !(l->rst_cnt % 16); in tipc_link_timeout()
795 tipc_link_build_proto_msg(l, mtyp, probe, 0, 0, 0, 0, xmitq); in tipc_link_timeout()
806 static int link_schedule_user(struct tipc_link *l, struct tipc_msg *hdr) in link_schedule_user() argument
808 u32 dnode = tipc_own_addr(l->net); in link_schedule_user()
814 dnode, l->addr, dport, 0, 0); in link_schedule_user()
819 skb_queue_tail(&l->wakeupq, skb); in link_schedule_user()
820 l->stats.link_congs++; in link_schedule_user()
830 static void link_prepare_wakeup(struct tipc_link *l) in link_prepare_wakeup() argument
835 skb_queue_walk_safe(&l->wakeupq, skb, tmp) { in link_prepare_wakeup()
837 if (l->backlog[imp].len < l->backlog[imp].limit) { in link_prepare_wakeup()
838 skb_unlink(skb, &l->wakeupq); in link_prepare_wakeup()
839 skb_queue_tail(l->inputq, skb); in link_prepare_wakeup()
846 void tipc_link_reset(struct tipc_link *l) in tipc_link_reset() argument
852 l->in_session = false; in tipc_link_reset()
853 l->session++; in tipc_link_reset()
854 l->mtu = l->advertised_mtu; in tipc_link_reset()
856 spin_lock_bh(&l->wakeupq.lock); in tipc_link_reset()
857 skb_queue_splice_init(&l->wakeupq, &list); in tipc_link_reset()
858 spin_unlock_bh(&l->wakeupq.lock); in tipc_link_reset()
860 spin_lock_bh(&l->inputq->lock); in tipc_link_reset()
861 skb_queue_splice_init(&list, l->inputq); in tipc_link_reset()
862 spin_unlock_bh(&l->inputq->lock); in tipc_link_reset()
864 __skb_queue_purge(&l->transmq); in tipc_link_reset()
865 __skb_queue_purge(&l->deferdq); in tipc_link_reset()
866 __skb_queue_purge(&l->backlogq); in tipc_link_reset()
867 l->backlog[TIPC_LOW_IMPORTANCE].len = 0; in tipc_link_reset()
868 l->backlog[TIPC_MEDIUM_IMPORTANCE].len = 0; in tipc_link_reset()
869 l->backlog[TIPC_HIGH_IMPORTANCE].len = 0; in tipc_link_reset()
870 l->backlog[TIPC_CRITICAL_IMPORTANCE].len = 0; in tipc_link_reset()
871 l->backlog[TIPC_SYSTEM_IMPORTANCE].len = 0; in tipc_link_reset()
872 kfree_skb(l->reasm_buf); in tipc_link_reset()
873 kfree_skb(l->failover_reasm_skb); in tipc_link_reset()
874 l->reasm_buf = NULL; in tipc_link_reset()
875 l->failover_reasm_skb = NULL; in tipc_link_reset()
876 l->rcv_unacked = 0; in tipc_link_reset()
877 l->snd_nxt = 1; in tipc_link_reset()
878 l->rcv_nxt = 1; in tipc_link_reset()
879 l->snd_nxt_state = 1; in tipc_link_reset()
880 l->rcv_nxt_state = 1; in tipc_link_reset()
881 l->acked = 0; in tipc_link_reset()
882 l->silent_intv_cnt = 0; in tipc_link_reset()
883 l->rst_cnt = 0; in tipc_link_reset()
884 l->stale_cnt = 0; in tipc_link_reset()
885 l->bc_peer_is_up = false; in tipc_link_reset()
886 memset(&l->mon_state, 0, sizeof(l->mon_state)); in tipc_link_reset()
887 tipc_link_reset_stats(l); in tipc_link_reset()
900 int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, in tipc_link_xmit() argument
904 unsigned int maxwin = l->window; in tipc_link_xmit()
906 unsigned int mtu = l->mtu; in tipc_link_xmit()
907 u16 ack = l->rcv_nxt - 1; in tipc_link_xmit()
908 u16 seqno = l->snd_nxt; in tipc_link_xmit()
909 u16 bc_ack = l->bc_rcvlink->rcv_nxt - 1; in tipc_link_xmit()
910 struct sk_buff_head *transmq = &l->transmq; in tipc_link_xmit()
911 struct sk_buff_head *backlogq = &l->backlogq; in tipc_link_xmit()
922 if (unlikely(l->backlog[imp].len >= l->backlog[imp].limit)) { in tipc_link_xmit()
924 pr_warn("%s<%s>, link overflow", link_rst_msg, l->name); in tipc_link_xmit()
927 rc = link_schedule_user(l, hdr); in tipc_link_xmit()
931 l->stats.sent_fragmented++; in tipc_link_xmit()
932 l->stats.sent_fragments += pkt_cnt; in tipc_link_xmit()
952 TIPC_SKB_CB(skb)->ackers = l->ackers; in tipc_link_xmit()
953 l->rcv_unacked = 0; in tipc_link_xmit()
954 l->stats.sent_pkts++; in tipc_link_xmit()
960 l->stats.sent_bundled++; in tipc_link_xmit()
963 if (tipc_msg_make_bundle(&bskb, hdr, mtu, l->addr)) { in tipc_link_xmit()
966 l->backlog[msg_importance(buf_msg(bskb))].len++; in tipc_link_xmit()
967 l->stats.sent_bundled++; in tipc_link_xmit()
968 l->stats.sent_bundles++; in tipc_link_xmit()
971 l->backlog[imp].len += skb_queue_len(list); in tipc_link_xmit()
974 l->snd_nxt = seqno; in tipc_link_xmit()
978 static void tipc_link_advance_backlog(struct tipc_link *l, in tipc_link_advance_backlog() argument
983 u16 seqno = l->snd_nxt; in tipc_link_advance_backlog()
984 u16 ack = l->rcv_nxt - 1; in tipc_link_advance_backlog()
985 u16 bc_ack = l->bc_rcvlink->rcv_nxt - 1; in tipc_link_advance_backlog()
987 while (skb_queue_len(&l->transmq) < l->window) { in tipc_link_advance_backlog()
988 skb = skb_peek(&l->backlogq); in tipc_link_advance_backlog()
994 __skb_dequeue(&l->backlogq); in tipc_link_advance_backlog()
996 l->backlog[msg_importance(hdr)].len--; in tipc_link_advance_backlog()
997 __skb_queue_tail(&l->transmq, skb); in tipc_link_advance_backlog()
999 TIPC_SKB_CB(skb)->ackers = l->ackers; in tipc_link_advance_backlog()
1003 l->rcv_unacked = 0; in tipc_link_advance_backlog()
1004 l->stats.sent_pkts++; in tipc_link_advance_backlog()
1007 l->snd_nxt = seqno; in tipc_link_advance_backlog()
1010 static void link_retransmit_failure(struct tipc_link *l, struct sk_buff *skb) in link_retransmit_failure() argument
1014 pr_warn("Retransmission failure on link <%s>\n", l->name); in link_retransmit_failure()
1015 link_print(l, "State of link "); in link_retransmit_failure()
1029 static int tipc_link_retrans(struct tipc_link *l, struct tipc_link *r, in tipc_link_retrans() argument
1032 struct sk_buff *_skb, *skb = skb_peek(&l->transmq); in tipc_link_retrans()
1033 u16 bc_ack = l->bc_rcvlink->rcv_nxt - 1; in tipc_link_retrans()
1034 u16 ack = l->rcv_nxt - 1; in tipc_link_retrans()
1046 link_retransmit_failure(l, skb); in tipc_link_retrans()
1047 if (link_is_bc_sndlink(l)) in tipc_link_retrans()
1049 return tipc_link_fsm_evt(l, LINK_FAILURE_EVT); in tipc_link_retrans()
1052 skb_queue_walk(&l->transmq, skb) { in tipc_link_retrans()
1066 l->stats.retransmitted++; in tipc_link_retrans()
1076 static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb, in tipc_data_input() argument
1079 struct sk_buff_head *mc_inputq = l->bc_rcvlink->inputq; in tipc_data_input()
1099 l->bc_rcvlink->state = LINK_ESTABLISHED; in tipc_data_input()
1100 skb_queue_tail(l->namedq, skb); in tipc_data_input()
1118 static int tipc_link_input(struct tipc_link *l, struct sk_buff *skb, in tipc_link_input() argument
1122 struct sk_buff **reasm_skb = &l->reasm_buf; in tipc_link_input()
1132 __skb_queue_purge(&l->deferdq); in tipc_link_input()
1140 if (less(msg_seqno(hdr), l->drop_point)) in tipc_link_input()
1142 if (tipc_data_input(l, skb, inputq)) in tipc_link_input()
1145 reasm_skb = &l->failover_reasm_skb; in tipc_link_input()
1150 l->stats.recv_bundles++; in tipc_link_input()
1151 l->stats.recv_bundled += msg_msgcnt(hdr); in tipc_link_input()
1153 tipc_data_input(l, iskb, &tmpq); in tipc_link_input()
1157 l->stats.recv_fragments++; in tipc_link_input()
1159 l->stats.recv_fragmented++; in tipc_link_input()
1160 tipc_data_input(l, skb, inputq); in tipc_link_input()
1161 } else if (!*reasm_skb && !link_is_bc_rcvlink(l)) { in tipc_link_input()
1163 return tipc_link_fsm_evt(l, LINK_FAILURE_EVT); in tipc_link_input()
1167 tipc_bcast_lock(l->net); in tipc_link_input()
1168 tipc_link_bc_init_rcv(l->bc_rcvlink, hdr); in tipc_link_input()
1169 tipc_bcast_unlock(l->net); in tipc_link_input()
1176 static bool tipc_link_release_pkts(struct tipc_link *l, u16 acked) in tipc_link_release_pkts() argument
1181 skb_queue_walk_safe(&l->transmq, skb, tmp) { in tipc_link_release_pkts()
1184 __skb_unlink(skb, &l->transmq); in tipc_link_release_pkts()
1196 int tipc_link_build_state_msg(struct tipc_link *l, struct sk_buff_head *xmitq) in tipc_link_build_state_msg() argument
1198 if (!l) in tipc_link_build_state_msg()
1202 if (link_is_bc_rcvlink(l)) { in tipc_link_build_state_msg()
1203 if (((l->rcv_nxt ^ tipc_own_addr(l->net)) & 0xf) != 0xf) in tipc_link_build_state_msg()
1205 l->rcv_unacked = 0; in tipc_link_build_state_msg()
1208 l->snd_nxt = l->rcv_nxt; in tipc_link_build_state_msg()
1213 l->rcv_unacked = 0; in tipc_link_build_state_msg()
1214 l->stats.sent_acks++; in tipc_link_build_state_msg()
1215 tipc_link_build_proto_msg(l, STATE_MSG, 0, 0, 0, 0, 0, xmitq); in tipc_link_build_state_msg()
1221 void tipc_link_build_reset_msg(struct tipc_link *l, struct sk_buff_head *xmitq) in tipc_link_build_reset_msg() argument
1226 if (l->state == LINK_ESTABLISHING) in tipc_link_build_reset_msg()
1229 tipc_link_build_proto_msg(l, mtyp, 0, 0, 0, 0, 0, xmitq); in tipc_link_build_reset_msg()
1233 if (skb && (l->state == LINK_RESET)) in tipc_link_build_reset_msg()
1241 static int tipc_link_build_nack_msg(struct tipc_link *l, in tipc_link_build_nack_msg() argument
1244 u32 def_cnt = ++l->stats.deferred_recv; in tipc_link_build_nack_msg()
1247 if (link_is_bc_rcvlink(l)) { in tipc_link_build_nack_msg()
1249 match2 = tipc_own_addr(l->net) & 0xf; in tipc_link_build_nack_msg()
1255 if ((skb_queue_len(&l->deferdq) == 1) || !(def_cnt % TIPC_NACK_INTV)) in tipc_link_build_nack_msg()
1256 tipc_link_build_proto_msg(l, STATE_MSG, 0, 0, 0, 0, 0, xmitq); in tipc_link_build_nack_msg()
1265 int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb, in tipc_link_rcv() argument
1268 struct sk_buff_head *defq = &l->deferdq; in tipc_link_rcv()
1276 rcv_nxt = l->rcv_nxt; in tipc_link_rcv()
1281 return tipc_link_proto_rcv(l, skb, xmitq); in tipc_link_rcv()
1283 if (unlikely(!link_is_up(l))) { in tipc_link_rcv()
1284 if (l->state == LINK_ESTABLISHING) in tipc_link_rcv()
1290 l->silent_intv_cnt = 0; in tipc_link_rcv()
1294 l->stats.duplicates++; in tipc_link_rcv()
1299 if (likely(tipc_link_release_pkts(l, msg_ack(hdr)))) { in tipc_link_rcv()
1300 l->stale_cnt = 0; in tipc_link_rcv()
1301 tipc_link_advance_backlog(l, xmitq); in tipc_link_rcv()
1302 if (unlikely(!skb_queue_empty(&l->wakeupq))) in tipc_link_rcv()
1303 link_prepare_wakeup(l); in tipc_link_rcv()
1309 rc |= tipc_link_build_nack_msg(l, xmitq); in tipc_link_rcv()
1314 l->rcv_nxt++; in tipc_link_rcv()
1315 l->stats.recv_pkts++; in tipc_link_rcv()
1316 if (!tipc_data_input(l, skb, l->inputq)) in tipc_link_rcv()
1317 rc |= tipc_link_input(l, skb, l->inputq); in tipc_link_rcv()
1318 if (unlikely(++l->rcv_unacked >= TIPC_MIN_LINK_WIN)) in tipc_link_rcv()
1319 rc |= tipc_link_build_state_msg(l, xmitq); in tipc_link_rcv()
1330 static void tipc_link_build_proto_msg(struct tipc_link *l, int mtyp, bool probe, in tipc_link_build_proto_msg() argument
1335 struct tipc_link *bcl = l->bc_rcvlink; in tipc_link_build_proto_msg()
1338 struct sk_buff_head *dfq = &l->deferdq; in tipc_link_build_proto_msg()
1340 struct tipc_mon_state *mstate = &l->mon_state; in tipc_link_build_proto_msg()
1345 if (tipc_link_is_blocked(l)) in tipc_link_build_proto_msg()
1348 if (!tipc_link_is_up(l) && (mtyp == STATE_MSG)) in tipc_link_build_proto_msg()
1352 rcvgap = buf_seqno(skb_peek(dfq)) - l->rcv_nxt; in tipc_link_build_proto_msg()
1355 tipc_max_domain_size, l->addr, in tipc_link_build_proto_msg()
1356 tipc_own_addr(l->net), 0, 0, 0); in tipc_link_build_proto_msg()
1362 msg_set_session(hdr, l->session); in tipc_link_build_proto_msg()
1363 msg_set_bearer_id(hdr, l->bearer_id); in tipc_link_build_proto_msg()
1364 msg_set_net_plane(hdr, l->net_plane); in tipc_link_build_proto_msg()
1365 msg_set_next_sent(hdr, l->snd_nxt); in tipc_link_build_proto_msg()
1366 msg_set_ack(hdr, l->rcv_nxt - 1); in tipc_link_build_proto_msg()
1369 msg_set_last_bcast(hdr, l->bc_sndlink->snd_nxt - 1); in tipc_link_build_proto_msg()
1374 msg_set_seqno(hdr, l->snd_nxt + U16_MAX / 2); in tipc_link_build_proto_msg()
1377 if (l->peer_caps & TIPC_LINK_PROTO_SEQNO) in tipc_link_build_proto_msg()
1378 msg_set_seqno(hdr, l->snd_nxt_state++); in tipc_link_build_proto_msg()
1383 tipc_mon_prep(l->net, data, &dlen, mstate, l->bearer_id); in tipc_link_build_proto_msg()
1386 l->stats.sent_states++; in tipc_link_build_proto_msg()
1387 l->rcv_unacked = 0; in tipc_link_build_proto_msg()
1390 msg_set_max_pkt(hdr, l->advertised_mtu); in tipc_link_build_proto_msg()
1391 strcpy(data, l->if_name); in tipc_link_build_proto_msg()
1396 l->stats.sent_probes++; in tipc_link_build_proto_msg()
1398 l->stats.sent_nacks++; in tipc_link_build_proto_msg()
1403 void tipc_link_create_dummy_tnl_msg(struct tipc_link *l, in tipc_link_create_dummy_tnl_msg() argument
1406 u32 onode = tipc_own_addr(l->net); in tipc_link_create_dummy_tnl_msg()
1410 u32 dnode = l->addr; in tipc_link_create_dummy_tnl_msg()
1423 msg_set_bearer_id(hdr, l->peer_bearer_id); in tipc_link_create_dummy_tnl_msg()
1430 tipc_link_xmit(l, &tnlq, xmitq); in tipc_link_create_dummy_tnl_msg()
1436 void tipc_link_tnl_prepare(struct tipc_link *l, struct tipc_link *tnl, in tipc_link_tnl_prepare() argument
1441 struct sk_buff_head *queue = &l->transmq; in tipc_link_tnl_prepare()
1443 u16 pktlen, pktcnt, seqno = l->snd_nxt; in tipc_link_tnl_prepare()
1453 BASIC_H_SIZE, 0, l->addr, tipc_own_addr(l->net), in tipc_link_tnl_prepare()
1460 tipc_link_xmit(l, &tnlq, &tmpxq); in tipc_link_tnl_prepare()
1464 tipc_msg_init(tipc_own_addr(l->net), &tnlhdr, TUNNEL_PROTOCOL, in tipc_link_tnl_prepare()
1465 mtyp, INT_H_SIZE, l->addr); in tipc_link_tnl_prepare()
1466 pktcnt = skb_queue_len(&l->transmq) + skb_queue_len(&l->backlogq); in tipc_link_tnl_prepare()
1468 msg_set_bearer_id(&tnlhdr, l->peer_bearer_id); in tipc_link_tnl_prepare()
1473 if (queue == &l->backlogq) in tipc_link_tnl_prepare()
1486 if (queue != &l->backlogq) { in tipc_link_tnl_prepare()
1487 queue = &l->backlogq; in tipc_link_tnl_prepare()
1494 tnl->drop_point = l->rcv_nxt; in tipc_link_tnl_prepare()
1495 tnl->failover_reasm_skb = l->reasm_buf; in tipc_link_tnl_prepare()
1496 l->reasm_buf = NULL; in tipc_link_tnl_prepare()
1503 bool tipc_link_validate_msg(struct tipc_link *l, struct tipc_msg *hdr) in tipc_link_validate_msg() argument
1505 u16 curr_session = l->peer_session; in tipc_link_validate_msg()
1514 if (!l->in_session) in tipc_link_validate_msg()
1519 if (!l->in_session) in tipc_link_validate_msg()
1525 if (!l->in_session) in tipc_link_validate_msg()
1530 if (!link_is_up(l) && msg_ack(hdr)) in tipc_link_validate_msg()
1532 if (!(l->peer_caps & TIPC_LINK_PROTO_SEQNO)) in tipc_link_validate_msg()
1535 return !less(msg_seqno(hdr), l->rcv_nxt_state); in tipc_link_validate_msg()
1546 static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb, in tipc_link_proto_rcv() argument
1556 u16 rcv_nxt = l->rcv_nxt; in tipc_link_proto_rcv()
1564 if (tipc_link_is_blocked(l) || !xmitq) in tipc_link_proto_rcv()
1567 if (tipc_own_addr(l->net) > msg_prevnode(hdr)) in tipc_link_proto_rcv()
1568 l->net_plane = msg_net_plane(hdr); in tipc_link_proto_rcv()
1574 if (!tipc_link_validate_msg(l, hdr)) in tipc_link_proto_rcv()
1581 if_name = strrchr(l->name, ':') + 1; in tipc_link_proto_rcv()
1582 if (sizeof(l->name) - (if_name - l->name) <= TIPC_MAX_IF_NAME) in tipc_link_proto_rcv()
1590 l->tolerance = peers_tol; in tipc_link_proto_rcv()
1591 l->bc_rcvlink->tolerance = peers_tol; in tipc_link_proto_rcv()
1594 if (in_range(peers_prio, l->priority + 1, TIPC_MAX_LINK_PRI)) in tipc_link_proto_rcv()
1595 l->priority = peers_prio; in tipc_link_proto_rcv()
1599 rc = tipc_link_fsm_evt(l, LINK_FAILURE_EVT); in tipc_link_proto_rcv()
1600 else if ((mtyp == RESET_MSG) || !link_is_up(l)) in tipc_link_proto_rcv()
1601 rc = tipc_link_fsm_evt(l, LINK_PEER_RESET_EVT); in tipc_link_proto_rcv()
1604 if ((mtyp == ACTIVATE_MSG) && (l->state == LINK_ESTABLISHING)) in tipc_link_proto_rcv()
1607 l->peer_session = msg_session(hdr); in tipc_link_proto_rcv()
1608 l->in_session = true; in tipc_link_proto_rcv()
1609 l->peer_bearer_id = msg_bearer_id(hdr); in tipc_link_proto_rcv()
1610 if (l->mtu > msg_max_pkt(hdr)) in tipc_link_proto_rcv()
1611 l->mtu = msg_max_pkt(hdr); in tipc_link_proto_rcv()
1615 l->rcv_nxt_state = msg_seqno(hdr) + 1; in tipc_link_proto_rcv()
1619 l->tolerance = peers_tol; in tipc_link_proto_rcv()
1620 l->bc_rcvlink->tolerance = peers_tol; in tipc_link_proto_rcv()
1623 if ((peers_prio != l->priority) && in tipc_link_proto_rcv()
1625 l->priority = peers_prio; in tipc_link_proto_rcv()
1626 rc = tipc_link_fsm_evt(l, LINK_FAILURE_EVT); in tipc_link_proto_rcv()
1629 l->silent_intv_cnt = 0; in tipc_link_proto_rcv()
1630 l->stats.recv_states++; in tipc_link_proto_rcv()
1632 l->stats.recv_probes++; in tipc_link_proto_rcv()
1634 if (!link_is_up(l)) { in tipc_link_proto_rcv()
1635 if (l->state == LINK_ESTABLISHING) in tipc_link_proto_rcv()
1639 tipc_mon_rcv(l->net, data, dlen, l->addr, in tipc_link_proto_rcv()
1640 &l->mon_state, l->bearer_id); in tipc_link_proto_rcv()
1643 if (more(peers_snd_nxt, rcv_nxt) && !tipc_link_is_synching(l)) in tipc_link_proto_rcv()
1644 rcvgap = peers_snd_nxt - l->rcv_nxt; in tipc_link_proto_rcv()
1646 tipc_link_build_proto_msg(l, STATE_MSG, 0, reply, in tipc_link_proto_rcv()
1648 tipc_link_release_pkts(l, ack); in tipc_link_proto_rcv()
1652 rc = tipc_link_retrans(l, l, ack + 1, ack + gap, xmitq); in tipc_link_proto_rcv()
1653 l->stats.recv_nacks++; in tipc_link_proto_rcv()
1656 tipc_link_advance_backlog(l, xmitq); in tipc_link_proto_rcv()
1657 if (unlikely(!skb_queue_empty(&l->wakeupq))) in tipc_link_proto_rcv()
1658 link_prepare_wakeup(l); in tipc_link_proto_rcv()
1667 static bool tipc_link_build_bc_proto_msg(struct tipc_link *l, bool bcast, in tipc_link_build_bc_proto_msg() argument
1673 struct sk_buff *dfrd_skb = skb_peek(&l->deferdq); in tipc_link_build_bc_proto_msg()
1674 u16 ack = l->rcv_nxt - 1; in tipc_link_build_bc_proto_msg()
1678 0, l->addr, tipc_own_addr(l->net), 0, 0, 0); in tipc_link_build_bc_proto_msg()
1682 msg_set_last_bcast(hdr, l->bc_sndlink->snd_nxt - 1); in tipc_link_build_bc_proto_msg()
1698 static void tipc_link_build_bc_init_msg(struct tipc_link *l, in tipc_link_build_bc_init_msg() argument
1704 if (!tipc_link_build_bc_proto_msg(l->bc_rcvlink, false, 0, &list)) in tipc_link_build_bc_init_msg()
1707 tipc_link_xmit(l, &list, xmitq); in tipc_link_build_bc_init_msg()
1712 void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr) in tipc_link_bc_init_rcv() argument
1717 if (link_is_up(l)) in tipc_link_bc_init_rcv()
1721 l->rcv_nxt = peers_snd_nxt; in tipc_link_bc_init_rcv()
1722 l->state = LINK_ESTABLISHED; in tipc_link_bc_init_rcv()
1726 if (l->peer_caps & TIPC_BCAST_SYNCH) in tipc_link_bc_init_rcv()
1734 l->rcv_nxt = peers_snd_nxt; in tipc_link_bc_init_rcv()
1740 static bool link_bc_retr_eval(struct tipc_link *l, u16 *from, u16 *to) in link_bc_retr_eval() argument
1742 unsigned long elapsed = jiffies_to_msecs(jiffies - l->prev_retr); in link_bc_retr_eval()
1749 less(*to, l->prev_from) || more(*from, l->prev_to)) { in link_bc_retr_eval()
1750 l->prev_from = *from; in link_bc_retr_eval()
1751 l->prev_to = *to; in link_bc_retr_eval()
1752 l->prev_retr = jiffies; in link_bc_retr_eval()
1757 if (!less(*from, l->prev_from) && !more(*to, l->prev_to)) in link_bc_retr_eval()
1761 if (less(*from, l->prev_from)) { in link_bc_retr_eval()
1762 *to = l->prev_from - 1; in link_bc_retr_eval()
1763 l->prev_from = *from; in link_bc_retr_eval()
1765 if (more(*to, l->prev_to)) { in link_bc_retr_eval()
1766 *from = l->prev_to + 1; in link_bc_retr_eval()
1767 l->prev_to = *to; in link_bc_retr_eval()
1769 l->prev_retr = jiffies; in link_bc_retr_eval()
1775 int tipc_link_bc_sync_rcv(struct tipc_link *l, struct tipc_msg *hdr, in tipc_link_bc_sync_rcv() argument
1778 struct tipc_link *snd_l = l->bc_sndlink; in tipc_link_bc_sync_rcv()
1784 if (!link_is_up(l)) in tipc_link_bc_sync_rcv()
1792 l->bc_peer_is_up = true; in tipc_link_bc_sync_rcv()
1794 if (!l->bc_peer_is_up) in tipc_link_bc_sync_rcv()
1797 l->stats.recv_nacks++; in tipc_link_bc_sync_rcv()
1800 if (more(peers_snd_nxt, l->rcv_nxt + l->window)) in tipc_link_bc_sync_rcv()
1804 rc = tipc_link_retrans(snd_l, l, from, to, xmitq); in tipc_link_bc_sync_rcv()
1806 l->snd_nxt = peers_snd_nxt; in tipc_link_bc_sync_rcv()
1807 if (link_bc_rcv_gap(l)) in tipc_link_bc_sync_rcv()
1811 if (l->peer_caps & TIPC_BCAST_STATE_NACK) in tipc_link_bc_sync_rcv()
1816 if (!more(peers_snd_nxt, l->rcv_nxt)) { in tipc_link_bc_sync_rcv()
1817 l->nack_state = BC_NACK_SND_CONDITIONAL; in tipc_link_bc_sync_rcv()
1822 if (l->nack_state == BC_NACK_SND_SUPPRESS) { in tipc_link_bc_sync_rcv()
1823 l->nack_state = BC_NACK_SND_UNCONDITIONAL; in tipc_link_bc_sync_rcv()
1828 if (l->nack_state == BC_NACK_SND_CONDITIONAL) { in tipc_link_bc_sync_rcv()
1829 l->nack_state = BC_NACK_SND_UNCONDITIONAL; in tipc_link_bc_sync_rcv()
1830 if ((peers_snd_nxt - l->rcv_nxt) < TIPC_MIN_LINK_WIN) in tipc_link_bc_sync_rcv()
1835 tipc_link_build_bc_proto_msg(l, true, peers_snd_nxt, xmitq); in tipc_link_bc_sync_rcv()
1836 l->nack_state = BC_NACK_SND_SUPPRESS; in tipc_link_bc_sync_rcv()
1840 void tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked, in tipc_link_bc_ack_rcv() argument
1844 struct tipc_link *snd_l = l->bc_sndlink; in tipc_link_bc_ack_rcv()
1846 if (!link_is_up(l) || !l->bc_peer_is_up) in tipc_link_bc_ack_rcv()
1849 if (!more(acked, l->acked)) in tipc_link_bc_ack_rcv()
1854 if (more(buf_seqno(skb), l->acked)) in tipc_link_bc_ack_rcv()
1867 l->acked = acked; in tipc_link_bc_ack_rcv()
1877 int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb, in tipc_link_bc_nack_rcv() argument
1891 if (!tipc_link_is_up(l) || !l->bc_peer_is_up) in tipc_link_bc_nack_rcv()
1897 if (dnode == tipc_own_addr(l->net)) { in tipc_link_bc_nack_rcv()
1898 tipc_link_bc_ack_rcv(l, acked, xmitq); in tipc_link_bc_nack_rcv()
1899 rc = tipc_link_retrans(l->bc_sndlink, l, from, to, xmitq); in tipc_link_bc_nack_rcv()
1900 l->stats.recv_nacks++; in tipc_link_bc_nack_rcv()
1905 if (more(peers_snd_nxt, l->rcv_nxt) && !less(l->rcv_nxt, from)) in tipc_link_bc_nack_rcv()
1906 l->nack_state = BC_NACK_SND_SUPPRESS; in tipc_link_bc_nack_rcv()
1911 void tipc_link_set_queue_limits(struct tipc_link *l, u32 win) in tipc_link_set_queue_limits() argument
1913 int max_bulk = TIPC_MAX_PUBL / (l->mtu / ITEM_SIZE); in tipc_link_set_queue_limits()
1915 l->window = win; in tipc_link_set_queue_limits()
1916 l->backlog[TIPC_LOW_IMPORTANCE].limit = max_t(u16, 50, win); in tipc_link_set_queue_limits()
1917 l->backlog[TIPC_MEDIUM_IMPORTANCE].limit = max_t(u16, 100, win * 2); in tipc_link_set_queue_limits()
1918 l->backlog[TIPC_HIGH_IMPORTANCE].limit = max_t(u16, 150, win * 3); in tipc_link_set_queue_limits()
1919 l->backlog[TIPC_CRITICAL_IMPORTANCE].limit = max_t(u16, 200, win * 4); in tipc_link_set_queue_limits()
1920 l->backlog[TIPC_SYSTEM_IMPORTANCE].limit = max_bulk; in tipc_link_set_queue_limits()
1927 void tipc_link_reset_stats(struct tipc_link *l) in tipc_link_reset_stats() argument
1929 memset(&l->stats, 0, sizeof(l->stats)); in tipc_link_reset_stats()
1932 static void link_print(struct tipc_link *l, const char *str) in link_print() argument
1934 struct sk_buff *hskb = skb_peek(&l->transmq); in link_print()
1935 u16 head = hskb ? msg_seqno(buf_msg(hskb)) : l->snd_nxt - 1; in link_print()
1936 u16 tail = l->snd_nxt - 1; in link_print()
1938 pr_info("%s Link <%s> state %x\n", str, l->name, l->state); in link_print()
1940 skb_queue_len(&l->transmq), head, tail, in link_print()
1941 skb_queue_len(&l->backlogq), l->snd_nxt, l->rcv_nxt); in link_print()
2234 void tipc_link_set_tolerance(struct tipc_link *l, u32 tol, in tipc_link_set_tolerance() argument
2237 l->tolerance = tol; in tipc_link_set_tolerance()
2238 if (l->bc_rcvlink) in tipc_link_set_tolerance()
2239 l->bc_rcvlink->tolerance = tol; in tipc_link_set_tolerance()
2240 if (link_is_up(l)) in tipc_link_set_tolerance()
2241 tipc_link_build_proto_msg(l, STATE_MSG, 0, 0, 0, tol, 0, xmitq); in tipc_link_set_tolerance()
2244 void tipc_link_set_prio(struct tipc_link *l, u32 prio, in tipc_link_set_prio() argument
2247 l->priority = prio; in tipc_link_set_prio()
2248 tipc_link_build_proto_msg(l, STATE_MSG, 0, 0, 0, 0, prio, xmitq); in tipc_link_set_prio()
2251 void tipc_link_set_abort_limit(struct tipc_link *l, u32 limit) in tipc_link_set_abort_limit() argument
2253 l->abort_limit = limit; in tipc_link_set_abort_limit()