diff options
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/link.c | 59 | ||||
| -rw-r--r-- | net/tipc/msg.h | 1 |
2 files changed, 14 insertions, 46 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 836727e363c4..9e265eb89726 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -105,7 +105,7 @@ struct tipc_stats { * @transmitq: queue for sent, non-acked messages * @backlogq: queue for messages waiting to be sent * @snt_nxt: next sequence number to use for outbound messages - * @last_retransmitted: sequence number of most recently retransmitted message + * @prev_from: sequence number of most previous retransmission request * @stale_cnt: counter for number of identical retransmit attempts * @stale_limit: time when repeated identical retransmits must force link reset * @ackers: # of peers that needs to ack each packet before it can be released @@ -163,7 +163,7 @@ struct tipc_link { u16 limit; } backlog[5]; u16 snd_nxt; - u16 last_retransm; + u16 prev_from; u16 window; u16 stale_cnt; unsigned long stale_limit; @@ -186,9 +186,6 @@ struct tipc_link { u16 acked; struct tipc_link *bc_rcvlink; struct tipc_link *bc_sndlink; - unsigned long prev_retr; - u16 prev_from; - u16 prev_to; u8 nack_state; bool bc_peer_is_up; @@ -210,7 +207,7 @@ enum { BC_NACK_SND_SUPPRESS, }; -#define TIPC_BC_RETR_LIMIT 10 /* [ms] */ +#define TIPC_BC_RETR_LIM msecs_to_jiffies(10) /* [ms] */ /* * Interval between NACKs when packets arrive out of order @@ -1036,10 +1033,12 @@ static int tipc_link_retrans(struct tipc_link *l, struct tipc_link *r, if (!skb) return 0; + if (less(to, from)) + return 0; /* Detect repeated retransmit failures on same packet */ - if (r->last_retransm != buf_seqno(skb)) { - r->last_retransm = buf_seqno(skb); + if (r->prev_from != from) { + r->prev_from = from; r->stale_limit = jiffies + msecs_to_jiffies(r->tolerance); r->stale_cnt = 0; } else if (++r->stale_cnt > 99 && time_after(jiffies, r->stale_limit)) { @@ -1055,6 +1054,11 @@ static int tipc_link_retrans(struct tipc_link *l, struct tipc_link *r, continue; if (more(msg_seqno(hdr), to)) break; + if (link_is_bc_sndlink(l)) { + if (time_before(jiffies, TIPC_SKB_CB(skb)->nxt_retr)) + continue; + TIPC_SKB_CB(skb)->nxt_retr = jiffies + TIPC_BC_RETR_LIM; + } _skb = __pskb_copy(skb, MIN_H_SIZE, GFP_ATOMIC); if (!_skb) return 0; @@ -1737,42 +1741,6 @@ void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr) l->rcv_nxt = peers_snd_nxt; } -/* link_bc_retr eval()- check if the indicated range can be retransmitted now - * - Adjust permitted range if there is overlap with previous retransmission - */ -static bool link_bc_retr_eval(struct tipc_link *l, u16 *from, u16 *to) -{ - unsigned long elapsed = jiffies_to_msecs(jiffies - l->prev_retr); - - if (less(*to, *from)) - return false; - - /* New retransmission request */ - if ((elapsed > TIPC_BC_RETR_LIMIT) || - less(*to, l->prev_from) || more(*from, l->prev_to)) { - l->prev_from = *from; - l->prev_to = *to; - l->prev_retr = jiffies; - return true; - } - - /* Inside range of previous retransmit */ - if (!less(*from, l->prev_from) && !more(*to, l->prev_to)) - return false; - - /* Fully or partially outside previous range => exclude overlap */ - if (less(*from, l->prev_from)) { - *to = l->prev_from - 1; - l->prev_from = *from; - } - if (more(*to, l->prev_to)) { - *from = l->prev_to + 1; - l->prev_to = *to; - } - l->prev_retr = jiffies; - return true; -} - /* tipc_link_bc_sync_rcv - update rcv link according to peer's send state */ int tipc_link_bc_sync_rcv(struct tipc_link *l, struct tipc_msg *hdr, @@ -1803,8 +1771,7 @@ int tipc_link_bc_sync_rcv(struct tipc_link *l, struct tipc_msg *hdr, if (more(peers_snd_nxt, l->rcv_nxt + l->window)) return rc; - if (link_bc_retr_eval(snd_l, &from, &to)) - rc = tipc_link_retrans(snd_l, l, from, to, xmitq); + rc = tipc_link_retrans(snd_l, l, from, to, xmitq); l->snd_nxt = peers_snd_nxt; if (link_bc_rcv_gap(l)) diff --git a/net/tipc/msg.h b/net/tipc/msg.h index a2879e6ec5b6..a0924956bb61 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -105,6 +105,7 @@ struct tipc_skb_cb { u32 bytes_read; u32 orig_member; struct sk_buff *tail; + unsigned long nxt_retr; bool validated; u16 chain_imp; u16 ackers; |