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Commit 59a30896 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by David S. Miller
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xdp: separate xdp_redirect tracepoint in map case 



Creating as specific xdp_redirect_map variant of the xdp tracepoints
allow users to write simpler/faster BPF progs that get attached to
these tracepoints.

Goal is to still keep the tracepoints in xdp_redirect and xdp_redirect_map
similar enough, that a tool can read the top part of the TP_STRUCT and
produce similar monitor statistics.

Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f5836ca5

include/trace/events/xdp.h

+38 −8
Original line number Diff line number Diff line
@@ -77,13 +77,11 @@ DECLARE_EVENT_CLASS(xdp_redirect_template, 
		__entry->map_index	= map_index;

	),



	TP_printk("prog_id=%d action=%s ifindex=%d to_ifindex=%d err=%d"

		  " map_id=%d map_index=%d",

	TP_printk("prog_id=%d action=%s ifindex=%d to_ifindex=%d err=%d",

		  __entry->prog_id,

		  __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB),

		  __entry->ifindex, __entry->to_ifindex,

		  __entry->err,

		  __entry->map_id, __entry->map_index)

		  __entry->err)

);



DEFINE_EVENT(xdp_redirect_template, xdp_redirect,
@@ -108,11 +106,43 @@ DEFINE_EVENT(xdp_redirect_template, xdp_redirect_err, 
#define _trace_xdp_redirect_err(dev, xdp, to, err)	\

	 trace_xdp_redirect_err(dev, xdp, to, err, NULL, 0);



#define trace_xdp_redirect_map(dev, xdp, fwd, map, idx)	\

	trace_xdp_redirect(dev, xdp, fwd ? fwd->ifindex : 0, 0, map, idx);

DEFINE_EVENT_PRINT(xdp_redirect_template, xdp_redirect_map,

	TP_PROTO(const struct net_device *dev,

		 const struct bpf_prog *xdp,

		 int to_ifindex, int err,

		 const struct bpf_map *map, u32 map_index),

	TP_ARGS(dev, xdp, to_ifindex, err, map, map_index),

	TP_printk("prog_id=%d action=%s ifindex=%d to_ifindex=%d err=%d"

		  " map_id=%d map_index=%d",

		  __entry->prog_id,

		  __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB),

		  __entry->ifindex, __entry->to_ifindex,

		  __entry->err,

		  __entry->map_id, __entry->map_index)

);



DEFINE_EVENT_PRINT(xdp_redirect_template, xdp_redirect_map_err,

	TP_PROTO(const struct net_device *dev,

		 const struct bpf_prog *xdp,

		 int to_ifindex, int err,

		 const struct bpf_map *map, u32 map_index),

	TP_ARGS(dev, xdp, to_ifindex, err, map, map_index),

	TP_printk("prog_id=%d action=%s ifindex=%d to_ifindex=%d err=%d"

		  " map_id=%d map_index=%d",

		  __entry->prog_id,

		  __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB),

		  __entry->ifindex, __entry->to_ifindex,

		  __entry->err,

		  __entry->map_id, __entry->map_index)

);



#define _trace_xdp_redirect_map(dev, xdp, fwd, map, idx)		\

	 trace_xdp_redirect_map(dev, xdp, fwd ? fwd->ifindex : 0,	\

				0, map, idx);



#define trace_xdp_redirect_map_err(dev, xdp, fwd, map, idx, err)	\

	trace_xdp_redirect_err(dev, xdp, fwd ? fwd->ifindex : 0, err, map, idx);

#define _trace_xdp_redirect_map_err(dev, xdp, fwd, map, idx, err)	\

	 trace_xdp_redirect_map_err(dev, xdp, fwd ? fwd->ifindex : 0,	\

				    err, map, idx);



#endif /* _TRACE_XDP_H */

net/core/filter.c

+2 −2
Original line number Diff line number Diff line
@@ -2525,10 +2525,10 @@ static int xdp_do_redirect_map(struct net_device *dev, struct xdp_buff *xdp, 
		goto err;



	ri->map_to_flush = map;

	trace_xdp_redirect_map(dev, xdp_prog, fwd, map, index);

	_trace_xdp_redirect_map(dev, xdp_prog, fwd, map, index);

	return 0;

err:

	trace_xdp_redirect_map_err(dev, xdp_prog, fwd, map, index, err);

	_trace_xdp_redirect_map_err(dev, xdp_prog, fwd, map, index, err);

	return err;

}