Commit 9c03b282 authored by Roopa Prabhu's avatar Roopa Prabhu Committed by David S. Miller
Browse files

trace: events: add a few neigh tracepoints 



The goal here is to trace neigh state changes covering all possible
neigh update paths. Plus have a specific trace point in neigh_update
to cover flags sent to neigh_update.

Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9e8ccd89

include/trace/events/neigh.h

0 → 100644
+204 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM neigh



#if !defined(_TRACE_NEIGH_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_NEIGH_H



#include <linux/skbuff.h>

#include <linux/netdevice.h>

#include <linux/tracepoint.h>

#include <net/neighbour.h>



#define neigh_state_str(state)				\

	__print_symbolic(state,				\

		{ NUD_INCOMPLETE, "incomplete" },	\

		{ NUD_REACHABLE, "reachable" },		\

		{ NUD_STALE, "stale" },			\

		{ NUD_DELAY, "delay" },			\

		{ NUD_PROBE, "probe" },			\

		{ NUD_FAILED, "failed" })



TRACE_EVENT(neigh_update,



	TP_PROTO(struct neighbour *n, const u8 *lladdr, u8 new,

		 u32 flags, u32 nlmsg_pid),



	TP_ARGS(n, lladdr, new, flags, nlmsg_pid),



	TP_STRUCT__entry(

		__field(u32, family)

		__string(dev, (n->dev ? n->dev->name : "NULL"))

		__array(u8, lladdr, MAX_ADDR_LEN)

		__field(u8, lladdr_len)

		__field(u8, flags)

		__field(u8, nud_state)

		__field(u8, type)

		__field(u8, dead)

		__field(int, refcnt)

		__array(__u8, primary_key4, 4)

		__array(__u8, primary_key6, 16)

		__field(unsigned long, confirmed)

		__field(unsigned long, updated)

		__field(unsigned long, used)

		__array(u8, new_lladdr, MAX_ADDR_LEN)

		__field(u8, new_state)

		__field(u32, update_flags)

		__field(u32, pid)

	),



	TP_fast_assign(

		int lladdr_len = (n->dev ? n->dev->addr_len : MAX_ADDR_LEN);

		struct in6_addr *pin6;

		__be32 *p32;



		__entry->family = n->tbl->family;

		__assign_str(dev, (n->dev ? n->dev->name : "NULL"));

		__entry->lladdr_len = lladdr_len;

		memcpy(__entry->lladdr, n->ha, lladdr_len);

		__entry->flags = n->flags;

		__entry->nud_state = n->nud_state;

		__entry->type = n->type;

		__entry->dead = n->dead;

		__entry->refcnt = refcount_read(&n->refcnt);

		pin6 = (struct in6_addr *)__entry->primary_key6;

		p32 = (__be32 *)__entry->primary_key4;



		if (n->tbl->family == AF_INET)

			*p32 = *(__be32 *)n->primary_key;

		else

			*p32 = 0;



#if IS_ENABLED(CONFIG_IPV6)

		if (n->tbl->family == AF_INET6) {

			pin6 = (struct in6_addr *)__entry->primary_key6;

			*pin6 = *(struct in6_addr *)n->primary_key;

		} else

#endif

		{

			ipv6_addr_set_v4mapped(*p32, pin6);

		}

		__entry->confirmed = n->confirmed;

		__entry->updated = n->updated;

		__entry->used = n->used;

		if (lladdr)

			memcpy(__entry->new_lladdr, lladdr, lladdr_len);

		__entry->new_state = new;

		__entry->update_flags = flags;

		__entry->pid = nlmsg_pid;

	),



	TP_printk("family %d dev %s lladdr %s flags %02x nud_state %s type %02x "

		  "dead %d refcnt %d primary_key4 %pI4 primary_key6 %pI6c "

		  "confirmed %lu updated %lu used %lu new_lladdr %s "

		  "new_state %02x update_flags %02x pid %d",

		  __entry->family, __get_str(dev),

		  __print_hex_str(__entry->lladdr, __entry->lladdr_len),

		  __entry->flags, neigh_state_str(__entry->nud_state),

		  __entry->type, __entry->dead, __entry->refcnt,

		  __entry->primary_key4, __entry->primary_key6,

		  __entry->confirmed, __entry->updated, __entry->used,

		  __print_hex_str(__entry->new_lladdr, __entry->lladdr_len),

		  __entry->new_state,

		  __entry->update_flags, __entry->pid)

);



DECLARE_EVENT_CLASS(neigh__update,

	TP_PROTO(struct neighbour *n, int err),

	TP_ARGS(n, err),

	TP_STRUCT__entry(

		__field(u32, family)

		__string(dev, (n->dev ? n->dev->name : "NULL"))

		__array(u8, lladdr, MAX_ADDR_LEN)

		__field(u8, lladdr_len)

		__field(u8, flags)

		__field(u8, nud_state)

		__field(u8, type)

		__field(u8, dead)

		__field(int, refcnt)

		__array(__u8, primary_key4, 4)

		__array(__u8, primary_key6, 16)

		__field(unsigned long, confirmed)

		__field(unsigned long, updated)

		__field(unsigned long, used)

		__field(u32, err)

	),



	TP_fast_assign(

		int lladdr_len = (n->dev ? n->dev->addr_len : MAX_ADDR_LEN);

		struct in6_addr *pin6;

		__be32 *p32;



		__entry->family = n->tbl->family;

		__assign_str(dev, (n->dev ? n->dev->name : "NULL"));

		__entry->lladdr_len = lladdr_len;

		memcpy(__entry->lladdr, n->ha, lladdr_len);

		__entry->flags = n->flags;

		__entry->nud_state = n->nud_state;

		__entry->type = n->type;

		__entry->dead = n->dead;

		__entry->refcnt = refcount_read(&n->refcnt);

		pin6 = (struct in6_addr *)__entry->primary_key6;

		p32 = (__be32 *)__entry->primary_key4;



		if (n->tbl->family == AF_INET)

			*p32 = *(__be32 *)n->primary_key;

		else

			*p32 = 0;



#if IS_ENABLED(CONFIG_IPV6)

		if (n->tbl->family == AF_INET6) {

			pin6 = (struct in6_addr *)__entry->primary_key6;

			*pin6 = *(struct in6_addr *)n->primary_key;

		} else

#endif

		{

			ipv6_addr_set_v4mapped(*p32, pin6);

		}



		__entry->confirmed = n->confirmed;

		__entry->updated = n->updated;

		__entry->used = n->used;

		__entry->err = err;

	),



	TP_printk("family %d dev %s lladdr %s flags %02x nud_state %s type %02x "

		  "dead %d refcnt %d primary_key4 %pI4 primary_key6 %pI6c "

		  "confirmed %lu updated %lu used %lu err %d",

		  __entry->family, __get_str(dev),

		  __print_hex_str(__entry->lladdr, __entry->lladdr_len),

		  __entry->flags, neigh_state_str(__entry->nud_state),

		  __entry->type, __entry->dead, __entry->refcnt,

		  __entry->primary_key4, __entry->primary_key6,

		  __entry->confirmed, __entry->updated, __entry->used,

		  __entry->err)

);



DEFINE_EVENT(neigh__update, neigh_update_done,

	TP_PROTO(struct neighbour *neigh, int err),

	TP_ARGS(neigh, err)

);



DEFINE_EVENT(neigh__update, neigh_timer_handler,

	TP_PROTO(struct neighbour *neigh, int err),

	TP_ARGS(neigh, err)

);



DEFINE_EVENT(neigh__update, neigh_event_send_done,

	TP_PROTO(struct neighbour *neigh, int err),

	TP_ARGS(neigh, err)

);



DEFINE_EVENT(neigh__update, neigh_event_send_dead,

	TP_PROTO(struct neighbour *neigh, int err),

	TP_ARGS(neigh, err)

);



DEFINE_EVENT(neigh__update, neigh_cleanup_and_release,

	TP_PROTO(struct neighbour *neigh, int rc),

	TP_ARGS(neigh, rc)

);



#endif /* _TRACE_NEIGH_H */



/* This part must be outside protection */

#include <trace/define_trace.h>

net/core/net-traces.c

+8 −0
Original line number Diff line number Diff line
@@ -43,6 +43,14 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(fdb_delete); 
EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_update);

#endif



#include <trace/events/neigh.h>

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_update);

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_update_done);

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_timer_handler);

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_event_send_done);

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_event_send_dead);

EXPORT_TRACEPOINT_SYMBOL_GPL(neigh_cleanup_and_release);



EXPORT_TRACEPOINT_SYMBOL_GPL(kfree_skb);



EXPORT_TRACEPOINT_SYMBOL_GPL(napi_poll);

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