9c270af37b
This patch connects cpumap to the xdp_do_redirect_map infrastructure. Still no SKB allocation are done yet. The XDP frames are transferred to the other CPU, but they are simply refcnt decremented on the remote CPU. This served as a good benchmark for measuring the overhead of remote refcnt decrement. If driver page recycle cache is not efficient then this, exposes a bottleneck in the page allocator. A shout-out to MST's ptr_ring, which is the secret behind is being so efficient to transfer memory pointers between CPUs, without constantly bouncing cache-lines between CPUs. V3: Handle !CONFIG_BPF_SYSCALL pointed out by kbuild test robot. V4: Make Generic-XDP aware of cpumap type, but don't allow redirect yet, as implementation require a separate upstream discussion. V5: - Fix a maybe-uninitialized pointed out by kbuild test robot. - Restrict bpf-prog side access to cpumap, open when use-cases appear - Implement cpu_map_enqueue() as a more simple void pointer enqueue V6: - Allow cpumap type for usage in helper bpf_redirect_map, general bpf-prog side restriction moved to earlier patch. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM xdp
|
|
|
|
#if !defined(_TRACE_XDP_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_XDP_H
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/filter.h>
|
|
#include <linux/tracepoint.h>
|
|
|
|
#define __XDP_ACT_MAP(FN) \
|
|
FN(ABORTED) \
|
|
FN(DROP) \
|
|
FN(PASS) \
|
|
FN(TX) \
|
|
FN(REDIRECT)
|
|
|
|
#define __XDP_ACT_TP_FN(x) \
|
|
TRACE_DEFINE_ENUM(XDP_##x);
|
|
#define __XDP_ACT_SYM_FN(x) \
|
|
{ XDP_##x, #x },
|
|
#define __XDP_ACT_SYM_TAB \
|
|
__XDP_ACT_MAP(__XDP_ACT_SYM_FN) { -1, 0 }
|
|
__XDP_ACT_MAP(__XDP_ACT_TP_FN)
|
|
|
|
TRACE_EVENT(xdp_exception,
|
|
|
|
TP_PROTO(const struct net_device *dev,
|
|
const struct bpf_prog *xdp, u32 act),
|
|
|
|
TP_ARGS(dev, xdp, act),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(int, prog_id)
|
|
__field(u32, act)
|
|
__field(int, ifindex)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->prog_id = xdp->aux->id;
|
|
__entry->act = act;
|
|
__entry->ifindex = dev->ifindex;
|
|
),
|
|
|
|
TP_printk("prog_id=%d action=%s ifindex=%d",
|
|
__entry->prog_id,
|
|
__print_symbolic(__entry->act, __XDP_ACT_SYM_TAB),
|
|
__entry->ifindex)
|
|
);
|
|
|
|
DECLARE_EVENT_CLASS(xdp_redirect_template,
|
|
|
|
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_STRUCT__entry(
|
|
__field(int, prog_id)
|
|
__field(u32, act)
|
|
__field(int, ifindex)
|
|
__field(int, err)
|
|
__field(int, to_ifindex)
|
|
__field(u32, map_id)
|
|
__field(int, map_index)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->prog_id = xdp->aux->id;
|
|
__entry->act = XDP_REDIRECT;
|
|
__entry->ifindex = dev->ifindex;
|
|
__entry->err = err;
|
|
__entry->to_ifindex = to_ifindex;
|
|
__entry->map_id = map ? map->id : 0;
|
|
__entry->map_index = map_index;
|
|
),
|
|
|
|
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)
|
|
);
|
|
|
|
DEFINE_EVENT(xdp_redirect_template, xdp_redirect,
|
|
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)
|
|
);
|
|
|
|
DEFINE_EVENT(xdp_redirect_template, xdp_redirect_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)
|
|
);
|
|
|
|
#define _trace_xdp_redirect(dev, xdp, to) \
|
|
trace_xdp_redirect(dev, xdp, to, 0, NULL, 0);
|
|
|
|
#define _trace_xdp_redirect_err(dev, xdp, to, err) \
|
|
trace_xdp_redirect_err(dev, xdp, to, err, NULL, 0);
|
|
|
|
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 devmap_ifindex(fwd, map) \
|
|
(!fwd ? 0 : \
|
|
(!map ? 0 : \
|
|
((map->map_type == BPF_MAP_TYPE_DEVMAP) ? \
|
|
((struct net_device *)fwd)->ifindex : 0)))
|
|
|
|
#define _trace_xdp_redirect_map(dev, xdp, fwd, map, idx) \
|
|
trace_xdp_redirect_map(dev, xdp, devmap_ifindex(fwd, map), \
|
|
0, map, idx)
|
|
|
|
#define _trace_xdp_redirect_map_err(dev, xdp, fwd, map, idx, err) \
|
|
trace_xdp_redirect_map_err(dev, xdp, devmap_ifindex(fwd, map), \
|
|
err, map, idx)
|
|
|
|
#endif /* _TRACE_XDP_H */
|
|
|
|
#include <trace/define_trace.h>
|