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14e5f71e31
For the cases where 'reason' doesn't give any clue, it's still nice to be able to track the kfree_skb caller location. %p doesn't help much so let's use %pS which prints the symbol+offset. Signed-off-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/r/20221123040947.1015721-1-sdf@google.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM skb
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#if !defined(_TRACE_SKB_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_SKB_H
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/tracepoint.h>
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#undef FN
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#define FN(reason) TRACE_DEFINE_ENUM(SKB_DROP_REASON_##reason);
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DEFINE_DROP_REASON(FN, FN)
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#undef FN
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#undef FNe
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#define FN(reason) { SKB_DROP_REASON_##reason, #reason },
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#define FNe(reason) { SKB_DROP_REASON_##reason, #reason }
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/*
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* Tracepoint for free an sk_buff:
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*/
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TRACE_EVENT(kfree_skb,
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TP_PROTO(struct sk_buff *skb, void *location,
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enum skb_drop_reason reason),
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TP_ARGS(skb, location, reason),
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TP_STRUCT__entry(
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__field(void *, skbaddr)
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__field(void *, location)
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__field(unsigned short, protocol)
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__field(enum skb_drop_reason, reason)
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),
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TP_fast_assign(
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__entry->skbaddr = skb;
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__entry->location = location;
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__entry->protocol = ntohs(skb->protocol);
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__entry->reason = reason;
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),
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TP_printk("skbaddr=%p protocol=%u location=%pS reason: %s",
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__entry->skbaddr, __entry->protocol, __entry->location,
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__print_symbolic(__entry->reason,
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DEFINE_DROP_REASON(FN, FNe)))
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);
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#undef FN
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#undef FNe
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TRACE_EVENT(consume_skb,
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TP_PROTO(struct sk_buff *skb),
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TP_ARGS(skb),
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TP_STRUCT__entry(
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__field( void *, skbaddr )
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),
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TP_fast_assign(
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__entry->skbaddr = skb;
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),
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TP_printk("skbaddr=%p", __entry->skbaddr)
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);
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TRACE_EVENT(skb_copy_datagram_iovec,
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TP_PROTO(const struct sk_buff *skb, int len),
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TP_ARGS(skb, len),
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TP_STRUCT__entry(
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__field( const void *, skbaddr )
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__field( int, len )
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),
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TP_fast_assign(
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__entry->skbaddr = skb;
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__entry->len = len;
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),
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TP_printk("skbaddr=%p len=%d", __entry->skbaddr, __entry->len)
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);
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#endif /* _TRACE_SKB_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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