diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/link.c | 38 | ||||
| -rw-r--r-- | net/tipc/link.h | 7 | ||||
| -rw-r--r-- | net/tipc/msg.h | 1 |
3 files changed, 34 insertions, 12 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index f0cf768a59f3..dfc738e5cff9 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -221,6 +221,7 @@ bool tipc_link_create(struct tipc_node *n, char *if_name, int bearer_id, l->mtu = mtu; l->priority = priority; tipc_link_set_queue_limits(l, window); + l->ackers = 1; l->inputq = inputq; l->namedq = namedq; l->state = LINK_RESETTING; @@ -647,6 +648,7 @@ void tipc_link_reset(struct tipc_link *l) l->rcv_unacked = 0; l->snd_nxt = 1; l->rcv_nxt = 1; + l->acked = 0; l->silent_intv_cnt = 0; l->stats.recv_info = 0; l->stale_count = 0; @@ -769,6 +771,7 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list, __skb_dequeue(list); __skb_queue_tail(transmq, skb); __skb_queue_tail(xmitq, _skb); + TIPC_SKB_CB(skb)->ackers = l->ackers; l->rcv_unacked = 0; seqno++; continue; @@ -829,6 +832,7 @@ void tipc_link_push_packets(struct tipc_link *link) skb = __skb_dequeue(&link->backlogq); if (!skb) break; + TIPC_SKB_CB(skb)->ackers = link->ackers; msg = buf_msg(skb); link->backlog[msg_importance(msg)].len--; msg_set_ack(msg, ack); @@ -862,6 +866,7 @@ void tipc_link_advance_backlog(struct tipc_link *l, struct sk_buff_head *xmitq) l->backlog[msg_importance(hdr)].len--; __skb_queue_tail(&l->transmq, skb); __skb_queue_tail(xmitq, _skb); + TIPC_SKB_CB(skb)->ackers = l->ackers; msg_set_ack(hdr, ack); msg_set_seqno(hdr, seqno); msg_set_bcast_ack(hdr, l->owner->bclink.last_in); @@ -947,11 +952,13 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, struct sk_buff *skb, } } -static int tipc_link_retransm(struct tipc_link *l, int retransm, - struct sk_buff_head *xmitq) +int tipc_link_retrans(struct tipc_link *l, u16 from, u16 to, + struct sk_buff_head *xmitq) { struct sk_buff *_skb, *skb = skb_peek(&l->transmq); struct tipc_msg *hdr; + u16 ack = l->rcv_nxt - 1; + u16 bc_ack = l->owner->bclink.last_in; if (!skb) return 0; @@ -964,19 +971,25 @@ static int tipc_link_retransm(struct tipc_link *l, int retransm, link_retransmit_failure(l, skb); return tipc_link_fsm_evt(l, LINK_FAILURE_EVT); } + + /* Move forward to where retransmission should start */ skb_queue_walk(&l->transmq, skb) { - if (!retransm) - return 0; + if (!less(buf_seqno(skb), from)) + break; + } + + skb_queue_walk_from(&l->transmq, skb) { + if (more(buf_seqno(skb), to)) + break; hdr = buf_msg(skb); _skb = __pskb_copy(skb, MIN_H_SIZE, GFP_ATOMIC); if (!_skb) return 0; hdr = buf_msg(_skb); - msg_set_ack(hdr, l->rcv_nxt - 1); - msg_set_bcast_ack(hdr, l->owner->bclink.last_in); + msg_set_ack(hdr, ack); + msg_set_bcast_ack(hdr, bc_ack); _skb->priority = TC_PRIO_CONTROL; __skb_queue_tail(xmitq, _skb); - retransm--; l->stats.retransmitted++; } return 0; @@ -1390,7 +1403,8 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb, { struct tipc_msg *hdr = buf_msg(skb); u16 rcvgap = 0; - u16 nacked_gap = msg_seq_gap(hdr); + u16 ack = msg_ack(hdr); + u16 gap = msg_seq_gap(hdr); u16 peers_snd_nxt = msg_next_sent(hdr); u16 peers_tol = msg_link_tolerance(hdr); u16 peers_prio = msg_linkprio(hdr); @@ -1469,11 +1483,11 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb, if (rcvgap || (msg_probe(hdr))) tipc_link_build_proto_msg(l, STATE_MSG, 0, rcvgap, 0, 0, xmitq); - tipc_link_release_pkts(l, msg_ack(hdr)); + tipc_link_release_pkts(l, ack); /* If NACK, retransmit will now start at right position */ - if (nacked_gap) { - rc = tipc_link_retransm(l, nacked_gap, xmitq); + if (gap) { + rc = tipc_link_retrans(l, ack + 1, ack + gap, xmitq); l->stats.recv_nacks++; } @@ -1550,7 +1564,7 @@ static void link_reset_statistics(struct tipc_link *l_ptr) static void link_print(struct tipc_link *l, const char *str) { struct sk_buff *hskb = skb_peek(&l->transmq); - u16 head = hskb ? msg_seqno(buf_msg(hskb)) : l->snd_nxt; + u16 head = hskb ? msg_seqno(buf_msg(hskb)) : l->snd_nxt - 1; u16 tail = l->snd_nxt - 1; pr_info("%s Link <%s> state %x\n", str, l->name, l->state); diff --git a/net/tipc/link.h b/net/tipc/link.h index 9e4e3673da76..be24d1fd5132 100644 --- a/net/tipc/link.h +++ b/net/tipc/link.h @@ -134,6 +134,8 @@ struct tipc_stats { * @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 + * @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 @@ -143,6 +145,7 @@ struct tipc_stats { * @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 { @@ -201,6 +204,10 @@ struct tipc_link { /* Fragmentation/reassembly */ struct sk_buff *reasm_buf; + /* Broadcast */ + u16 ackers; + u16 acked; + /* Statistics */ struct tipc_stats stats; }; diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 9f0ef54be612..799782c47f6c 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -112,6 +112,7 @@ struct tipc_skb_cb { bool wakeup_pending; u16 chain_sz; u16 chain_imp; + u16 ackers; }; #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) |