intercept in retransmit_skb to increment profile slots

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks.c

@@ -48,6 +48,7 @@ struct ptcp_hook_heads ptcp_hook_heads = {
   .rxtx_sync_shared_seq = LIST_HEAD_INIT(ptcp_hook_heads.rxtx_sync_shared_seq),
   .tx_adjust_urg = LIST_HEAD_INIT(ptcp_hook_heads.tx_adjust_urg),
   .tx_incr_tail = LIST_HEAD_INIT(ptcp_hook_heads.tx_incr_tail),
+  .tx_incr_profile = LIST_HEAD_INIT(ptcp_hook_heads.tx_incr_profile),
   .is_paced_flow = LIST_HEAD_INIT(ptcp_hook_heads.is_paced_flow),
   .get_retransmit_skb = LIST_HEAD_INIT(ptcp_hook_heads.get_retransmit_skb),
 };
@@ -137,6 +138,12 @@ int ptcp_tx_incr_tail(struct sock *sk, struct sk_buff *skb)
 }
 EXPORT_SYMBOL(ptcp_tx_incr_tail);
 
+int ptcp_tx_incr_profile(struct sock *sk, struct sk_buff *skb)
+{
+  return call_ptcp_int_hook(tx_incr_profile, -1, sk, skb);
+}
+EXPORT_SYMBOL(ptcp_tx_incr_profile);
+
 int ptcp_is_paced_flow(struct sock *sk)
 {
   return call_ptcp_int_hook(is_paced_flow, -1, sk);

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks.h

@@ -33,6 +33,7 @@ int ptcp_tx_adjust_seq(struct sock *sk, struct sk_buff *skb, int copy, int copie
 int ptcp_rxtx_sync_shared_seq(struct sock *sk, struct sk_buff *skb, int write);
 int ptcp_tx_adjust_urg(struct sock *sk, struct sk_buff *skb);
 int ptcp_tx_incr_tail(struct sock *sk, struct sk_buff *skb);
+int ptcp_tx_incr_profile(struct sock *sk, struct sk_buff *skb);
 int ptcp_is_paced_flow(struct sock *sk);
 int ptcp_get_retransmit_skb(struct sock *sk, struct sk_buff **skb_p);
 

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks_impl.c

@@ -178,6 +178,18 @@ ptcp_impl_tx_incr_tail(struct sock *sk, struct sk_buff *skb)
   return -1;
 }
 
+int (*lnk_tx_incr_profile) (struct sock *sk, struct sk_buff *skb) = 0;
+EXPORT_SYMBOL(lnk_tx_incr_profile);
+static int
+ptcp_impl_tx_incr_profile(struct sock *sk, struct sk_buff *skb)
+{
+  if (lnk_tx_incr_profile) {
+    return lnk_tx_incr_profile(sk, skb);
+  }
+
+  return -1;
+}
+
 int (*lnk_is_paced_flow) (struct sock *sk) = 0;
 EXPORT_SYMBOL(lnk_is_paced_flow);
 static int
@@ -216,6 +228,7 @@ struct ptcp_hook_list ptcp_hooks[NUM_PTCP_HOOKS] = {
   PTCP_HOOK_INIT(rxtx_sync_shared_seq, ptcp_impl_rxtx_sync_shared_seq),
   PTCP_HOOK_INIT(tx_adjust_urg, ptcp_impl_tx_adjust_urg),
   PTCP_HOOK_INIT(tx_incr_tail, ptcp_impl_tx_incr_tail),
+  PTCP_HOOK_INIT(tx_incr_profile, ptcp_impl_tx_incr_profile),
   PTCP_HOOK_INIT(is_paced_flow, ptcp_impl_is_paced_flow),
   PTCP_HOOK_INIT(get_retransmit_skb, ptcp_impl_get_retransmit_skb),
 };

drivers/net/ethernet/broadcom/bnx2x/sme/ptcp_hooks_impl.h

@@ -41,6 +41,7 @@ union ptcp_list_options {
   int (*rxtx_sync_shared_seq) (struct sock *sk, struct sk_buff *skb, int write);
   int (*tx_adjust_urg) (struct sock *sk, struct sk_buff *skb);
   int (*tx_incr_tail) (struct sock *sk, struct sk_buff *skb);
+  int (*tx_incr_profile) (struct sock *sk, struct sk_buff *skb);
   int (*is_paced_flow) (struct sock *sk);
   int (*get_retransmit_skb) (struct sock *sk, struct sk_buff **skb_p);
 };
@@ -59,6 +60,7 @@ struct ptcp_hook_heads {
   struct list_head rxtx_sync_shared_seq;
   struct list_head tx_adjust_urg;
   struct list_head tx_incr_tail;
+  struct list_head tx_incr_profile;
   struct list_head is_paced_flow;
   struct list_head get_retransmit_skb;
 };
@@ -73,7 +75,7 @@ struct ptcp_hook_list {
 { .head = &ptcp_hook_heads.HEAD, .hook = { . HEAD = HOOK } }
 
 // increment this every time a new hook is added
-#define NUM_PTCP_HOOKS  15
+#define NUM_PTCP_HOOKS  16
 
 extern struct ptcp_hook_heads ptcp_hook_heads;
 extern struct ptcp_hook_list ptcp_hooks[NUM_PTCP_HOOKS];

net/ipv4/tcp_output.c

@@ -2981,6 +2981,9 @@ int __tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb, int segs)
 		if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_SYN)
 			__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPSYNRETRANS);
 		tp->total_retrans += segs;
+#if defined(CONFIG_XEN_SME) && defined(CONFIG_PACER_TCP)
+    ptcp_tx_incr_profile(sk, skb);
+#endif
 	}
 	return err;
 }