diff options
| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2018-05-24 16:46:22 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-05-24 18:36:15 -0700 |
| commit | a570e48fee1bc26f47aba2e1493f96a03bed3c8f (patch) | |
| tree | 069715fbcf7b0f4b73103861fd0a111e143b5705 /samples/bpf/xdp_monitor_kern.c | |
| parent | xdp/trace: extend tracepoint in devmap with an err (diff) | |
| download | linux-dev-a570e48fee1bc26f47aba2e1493f96a03bed3c8f.tar.xz linux-dev-a570e48fee1bc26f47aba2e1493f96a03bed3c8f.zip | |
samples/bpf: xdp_monitor use err code from tracepoint xdp:xdp_devmap_xmit
Update xdp_monitor to use the recently added err code introduced
in tracepoint xdp:xdp_devmap_xmit, to show if the drop count is
caused by some driver general delivery problem. Other kind of drops
will likely just be more normal TX space issues.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples/bpf/xdp_monitor_kern.c')
| -rw-r--r-- | samples/bpf/xdp_monitor_kern.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/samples/bpf/xdp_monitor_kern.c b/samples/bpf/xdp_monitor_kern.c index 2854aa0665ea..ad10fe700d7d 100644 --- a/samples/bpf/xdp_monitor_kern.c +++ b/samples/bpf/xdp_monitor_kern.c @@ -125,6 +125,7 @@ struct datarec { u64 processed; u64 dropped; u64 info; + u64 err; }; #define MAX_CPUS 64 @@ -228,6 +229,7 @@ struct devmap_xmit_ctx { int sent; // offset:24; size:4; signed:1; int from_ifindex; // offset:28; size:4; signed:1; int to_ifindex; // offset:32; size:4; signed:1; + int err; // offset:36; size:4; signed:1; }; SEC("tracepoint/xdp/xdp_devmap_xmit") @@ -245,5 +247,13 @@ int trace_xdp_devmap_xmit(struct devmap_xmit_ctx *ctx) /* Record bulk events, then userspace can calc average bulk size */ rec->info += 1; + /* Record error cases, where no frame were sent */ + if (ctx->err) + rec->err++; + + /* Catch API error of drv ndo_xdp_xmit sent more than count */ + if (ctx->drops < 0) + rec->err++; + return 1; } |