tipc: add back link trace events

In the previous commit ("tipc: add Gap ACK blocks support for broadcast
link"), we have removed the following link trace events due to the code
changes:

- tipc_link_bc_ack
- tipc_link_retrans

This commit adds them back along with some minor changes to adapt to
the new code.

Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/link.c b/net/tipc/link.c
index d29b9c5..288c567 100644 (file)
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1504,6 +1504,8 @@ static int tipc_link_advance_transmq(struct tipc_link *l, struct tipc_link *r,
        bool is_uc = !link_is_bc_sndlink(l);
        bool bc_has_acked = false;
 
+       trace_tipc_link_retrans(r, acked + 1, acked + gap, &l->transmq);
+
        /* Determine Gap ACK blocks if any for the particular link */
        if (ga && is_uc) {
                /* Get the Gap ACKs, uc part */
@@ -2410,6 +2412,7 @@ int tipc_link_bc_ack_rcv(struct tipc_link *r, u16 acked, u16 gap,
        if (less(acked, r->acked) || (acked == r->acked && !gap && !ga))
                return 0;
 
+       trace_tipc_link_bc_ack(r, acked, gap, &l->transmq);
        tipc_link_advance_transmq(l, r, acked, gap, ga, xmitq, &unused, &rc);
 
        tipc_link_advance_backlog(l, xmitq);

diff --git a/net/tipc/trace.h b/net/tipc/trace.h
index 4d8e004..e7535ab 100644 (file)
--- a/net/tipc/trace.h
+++ b/net/tipc/trace.h
@@ -299,8 +299,10 @@ DECLARE_EVENT_CLASS(tipc_link_transmq_class,
                __entry->from = f;
                __entry->to = t;
                __entry->len = skb_queue_len(tq);
-               __entry->fseqno = msg_seqno(buf_msg(skb_peek(tq)));
-               __entry->lseqno = msg_seqno(buf_msg(skb_peek_tail(tq)));
+               __entry->fseqno = __entry->len ?
+                                 msg_seqno(buf_msg(skb_peek(tq))) : 0;
+               __entry->lseqno = __entry->len ?
+                                 msg_seqno(buf_msg(skb_peek_tail(tq))) : 0;
        ),
 
        TP_printk("<%s> retrans req: [%u-%u] transmq: %u [%u-%u]\n",
@@ -308,15 +310,16 @@ DECLARE_EVENT_CLASS(tipc_link_transmq_class,
                  __entry->len, __entry->fseqno, __entry->lseqno)
 );
 
-DEFINE_EVENT(tipc_link_transmq_class, tipc_link_retrans,
+DEFINE_EVENT_CONDITION(tipc_link_transmq_class, tipc_link_retrans,
        TP_PROTO(struct tipc_link *r, u16 f, u16 t, struct sk_buff_head *tq),
-       TP_ARGS(r, f, t, tq)
+       TP_ARGS(r, f, t, tq),
+       TP_CONDITION(less_eq(f, t))
 );
 
 DEFINE_EVENT_PRINT(tipc_link_transmq_class, tipc_link_bc_ack,
        TP_PROTO(struct tipc_link *r, u16 f, u16 t, struct sk_buff_head *tq),
        TP_ARGS(r, f, t, tq),
-       TP_printk("<%s> acked: [%u-%u] transmq: %u [%u-%u]\n",
+       TP_printk("<%s> acked: %u gap: %u transmq: %u [%u-%u]\n",
                  __entry->name, __entry->from, __entry->to,
                  __entry->len, __entry->fseqno, __entry->lseqno)
 );