From df844fd46b98c2efde8f4ac2d50d59bc90c4c679 Mon Sep 17 00:00:00 2001 From: David Howells Date: Tue, 23 Aug 2016 15:27:24 +0100 Subject: rxrpc: Use a tracepoint for skb accounting debugging Use a tracepoint to log various skb accounting points to help in debugging refcounting errors. Signed-off-by: David Howells --- include/trace/events/rxrpc.h | 56 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 include/trace/events/rxrpc.h (limited to 'include/trace') diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h new file mode 100644 index 0000000..15283ee --- /dev/null +++ b/include/trace/events/rxrpc.h @@ -0,0 +1,56 @@ +/* AF_RXRPC tracepoints + * + * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM rxrpc + +#if !defined(_TRACE_RXRPC_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_RXRPC_H + +#include + +TRACE_EVENT(rxrpc_skb, + TP_PROTO(struct sk_buff *skb, int op, int usage, int mod_count, + const void *where), + + TP_ARGS(skb, op, usage, mod_count, where), + + TP_STRUCT__entry( + __field(struct sk_buff *, skb ) + __field(int, op ) + __field(int, usage ) + __field(int, mod_count ) + __field(const void *, where ) + ), + + TP_fast_assign( + __entry->skb = skb; + __entry->op = op; + __entry->usage = usage; + __entry->mod_count = mod_count; + __entry->where = where; + ), + + TP_printk("s=%p %s u=%d m=%d p=%pSR", + __entry->skb, + (__entry->op == 0 ? "NEW" : + __entry->op == 1 ? "SEE" : + __entry->op == 2 ? "GET" : + __entry->op == 3 ? "FRE" : + "PUR"), + __entry->usage, + __entry->mod_count, + __entry->where) + ); + +#endif /* _TRACE_RXRPC_H */ + +/* This part must be outside protection */ +#include -- cgit v1.1