diff options
Diffstat (limited to 'net/tipc/link.c')
| -rw-r--r-- | net/tipc/link.c | 124 |
1 files changed, 103 insertions, 21 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 955b87d9b46..ba7d3f19be1 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1604,40 +1604,121 @@ void tipc_link_push_queue(struct link *l_ptr) tipc_bearer_schedule(l_ptr->b_ptr, l_ptr); } +static void link_reset_all(unsigned long addr) +{ + struct node *n_ptr; + char addr_string[16]; + u32 i; + + read_lock_bh(&tipc_net_lock); + n_ptr = tipc_node_find((u32)addr); + if (!n_ptr) { + read_unlock_bh(&tipc_net_lock); + return; /* node no longer exists */ + } + + tipc_node_lock(n_ptr); + + warn("Resetting all links to %s\n", + addr_string_fill(addr_string, n_ptr->addr)); + + for (i = 0; i < MAX_BEARERS; i++) { + if (n_ptr->links[i]) { + link_print(n_ptr->links[i], TIPC_OUTPUT, + "Resetting link\n"); + tipc_link_reset(n_ptr->links[i]); + } + } + + tipc_node_unlock(n_ptr); + read_unlock_bh(&tipc_net_lock); +} + +static void link_retransmit_failure(struct link *l_ptr, struct sk_buff *buf) +{ + struct tipc_msg *msg = buf_msg(buf); + + warn("Retransmission failure on link <%s>\n", l_ptr->name); + tipc_msg_print(TIPC_OUTPUT, msg, ">RETR-FAIL>"); + + if (l_ptr->addr) { + + /* Handle failure on standard link */ + + link_print(l_ptr, TIPC_OUTPUT, "Resetting link\n"); + tipc_link_reset(l_ptr); + + } else { + + /* Handle failure on broadcast link */ + + struct node *n_ptr; + char addr_string[16]; + + tipc_printf(TIPC_OUTPUT, "Msg seq number: %u, ", msg_seqno(msg)); + tipc_printf(TIPC_OUTPUT, "Outstanding acks: %u\n", (u32)TIPC_SKB_CB(buf)->handle); + + n_ptr = l_ptr->owner->next; + tipc_node_lock(n_ptr); + + addr_string_fill(addr_string, n_ptr->addr); + tipc_printf(TIPC_OUTPUT, "Multicast link info for %s\n", addr_string); + tipc_printf(TIPC_OUTPUT, "Supported: %d, ", n_ptr->bclink.supported); + tipc_printf(TIPC_OUTPUT, "Acked: %u\n", n_ptr->bclink.acked); + tipc_printf(TIPC_OUTPUT, "Last in: %u, ", n_ptr->bclink.last_in); + tipc_printf(TIPC_OUTPUT, "Gap after: %u, ", n_ptr->bclink.gap_after); + tipc_printf(TIPC_OUTPUT, "Gap to: %u\n", n_ptr->bclink.gap_to); + tipc_printf(TIPC_OUTPUT, "Nack sync: %u\n\n", n_ptr->bclink.nack_sync); + + tipc_k_signal((Handler)link_reset_all, (unsigned long)n_ptr->addr); + + tipc_node_unlock(n_ptr); + + l_ptr->stale_count = 0; + } +} + void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf, u32 retransmits) { struct tipc_msg *msg; + if (!buf) + return; + + msg = buf_msg(buf); + dbg("Retransmitting %u in link %x\n", retransmits, l_ptr); - if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr) && buf && !skb_cloned(buf)) { - msg_dbg(buf_msg(buf), ">NO_RETR->BCONG>"); - dbg_print_link(l_ptr, " "); - l_ptr->retransm_queue_head = msg_seqno(buf_msg(buf)); - l_ptr->retransm_queue_size = retransmits; - return; + if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) { + if (!skb_cloned(buf)) { + msg_dbg(msg, ">NO_RETR->BCONG>"); + dbg_print_link(l_ptr, " "); + l_ptr->retransm_queue_head = msg_seqno(msg); + l_ptr->retransm_queue_size = retransmits; + return; + } else { + /* Don't retransmit if driver already has the buffer */ + } + } else { + /* Detect repeated retransmit failures on uncongested bearer */ + + if (l_ptr->last_retransmitted == msg_seqno(msg)) { + if (++l_ptr->stale_count > 100) { + link_retransmit_failure(l_ptr, buf); + return; + } + } else { + l_ptr->last_retransmitted = msg_seqno(msg); + l_ptr->stale_count = 1; + } } + while (retransmits && (buf != l_ptr->next_out) && buf && !skb_cloned(buf)) { msg = buf_msg(buf); msg_set_ack(msg, mod(l_ptr->next_in_no - 1)); msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in); if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) { - /* Catch if retransmissions fail repeatedly: */ - if (l_ptr->last_retransmitted == msg_seqno(msg)) { - if (++l_ptr->stale_count > 100) { - tipc_msg_print(TIPC_CONS, buf_msg(buf), ">RETR>"); - info("...Retransmitted %u times\n", - l_ptr->stale_count); - link_print(l_ptr, TIPC_CONS, "Resetting Link\n"); - tipc_link_reset(l_ptr); - break; - } - } else { - l_ptr->stale_count = 0; - } - l_ptr->last_retransmitted = msg_seqno(msg); - msg_dbg(buf_msg(buf), ">RETR>"); buf = buf->next; retransmits--; @@ -1650,6 +1731,7 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf, return; } } + l_ptr->retransm_queue_head = l_ptr->retransm_queue_size = 0; } |