diff options
| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2017-08-24 12:33:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-24 11:59:37 -0700 |
| commit | a873585587205750e7accfb2c93c29239ffa6e09 (patch) | |
| tree | 3896a9d8cd9c2fb67d06e549e8ff0614beebfbe5 /include/trace | |
| parent | 2886447dc5add28226451c163cd9ac1d1b3bf59a (diff) | |
| download | linux-a873585587205750e7accfb2c93c29239ffa6e09.tar.bz2 | |
xdp: remove net_device names from xdp_redirect tracepoint
There is too much overhead in the current trace_xdp_redirect
tracepoint as it does strcpy and strlen on the net_device names.
Besides, exposing the ifindex/index is actually the information that
is needed in the tracepoint to diagnose issues. When a lookup fails
(either ifindex or devmap index) then there is a need for saying which
to_index that have issues.
V2: Adjust args to be aligned with trace_xdp_exception.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/xdp.h | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/include/trace/events/xdp.h b/include/trace/events/xdp.h index 0e42e69f773b..cd37706c6f55 100644 --- a/include/trace/events/xdp.h +++ b/include/trace/events/xdp.h @@ -51,33 +51,33 @@ TRACE_EVENT(xdp_exception, TRACE_EVENT(xdp_redirect, - TP_PROTO(const struct net_device *from, - const struct net_device *to, - const struct bpf_prog *xdp, u32 act, int err), + TP_PROTO(const struct net_device *dev, + const struct bpf_prog *xdp, u32 act, + int to_index, int err), - TP_ARGS(from, to, xdp, act, err), + TP_ARGS(dev, xdp, act, to_index, err), TP_STRUCT__entry( - __string(name_from, from->name) - __string(name_to, to->name) __array(u8, prog_tag, 8) __field(u32, act) + __field(int, ifindex) + __field(int, to_index) __field(int, err) ), TP_fast_assign( BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(xdp->tag)); memcpy(__entry->prog_tag, xdp->tag, sizeof(xdp->tag)); - __assign_str(name_from, from->name); - __assign_str(name_to, to->name); - __entry->act = act; - __entry->err = err; + __entry->act = act; + __entry->ifindex = dev->ifindex; + __entry->to_index = to_index; + __entry->err = err; ), - TP_printk("prog=%s from=%s to=%s action=%s err=%d", + TP_printk("prog=%s action=%s ifindex=%d to_index=%d err=%d", __print_hex_str(__entry->prog_tag, 8), - __get_str(name_from), __get_str(name_to), __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB), + __entry->ifindex, __entry->to_index, __entry->err) ); #endif /* _TRACE_XDP_H */ |