diff options
| author | Kumar Kartikeya Dwivedi | 2021-08-21 05:49:59 +0530 |
|---|---|---|
| committer | Alexei Starovoitov | 2021-08-24 14:48:41 -0700 |
| commit | af93d58c27b6ac4154f1651f47be2a159f8ce30f (patch) | |
| tree | 7cad9d1507b0b8c03cbd7653357f56be916ec469 /samples/bpf/xdp_sample_user.h | |
| parent | 5f116212f4018fc9aa7a2a828b27aab540b8e5fa (diff) | |
samples: bpf: Add devmap_xmit tracepoint statistics support
This adds support for retrieval and printing for devmap_xmit total and
mutli mode tracepoint. For multi mode, we keep a hash map entry for each
redirection stream, such that we can dynamically add and remove entries
on output.
The from_match and to_match will be set by individual samples when
setting up the XDP program on these devices.
The multi mode tracepoint is also handy for xdp_redirect_map_multi,
where up to 32 devices can be specified.
Also add samples_init_pre_load macro to finally set up the resized maps
and mmap them in place for low overhead stats retrieval.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-12-memxor@gmail.com
Diffstat (limited to 'samples/bpf/xdp_sample_user.h')
| -rw-r--r-- | samples/bpf/xdp_sample_user.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/samples/bpf/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h index 203732615fee..3a678986cce2 100644 --- a/samples/bpf/xdp_sample_user.h +++ b/samples/bpf/xdp_sample_user.h @@ -14,9 +14,11 @@ enum stats_mask { SAMPLE_CPUMAP_ENQUEUE_CNT = 1U << 3, SAMPLE_CPUMAP_KTHREAD_CNT = 1U << 4, SAMPLE_EXCEPTION_CNT = 1U << 5, + SAMPLE_DEVMAP_XMIT_CNT = 1U << 6, SAMPLE_REDIRECT_CNT = 1U << 7, SAMPLE_REDIRECT_MAP_CNT = SAMPLE_REDIRECT_CNT | _SAMPLE_REDIRECT_MAP, SAMPLE_REDIRECT_ERR_MAP_CNT = SAMPLE_REDIRECT_ERR_CNT | _SAMPLE_REDIRECT_MAP, + SAMPLE_DEVMAP_XMIT_CNT_MULTI = 1U << 8, }; /* Exit return codes */ @@ -63,6 +65,17 @@ static inline char *safe_strncpy(char *dst, const char *src, size_t size) return -errno; \ }) +#define sample_init_pre_load(skel) \ + ({ \ + skel->rodata->nr_cpus = libbpf_num_possible_cpus(); \ + sample_setup_maps((struct bpf_map *[]){ \ + skel->maps.rx_cnt, skel->maps.redir_err_cnt, \ + skel->maps.cpumap_enqueue_cnt, \ + skel->maps.cpumap_kthread_cnt, \ + skel->maps.exception_cnt, skel->maps.devmap_xmit_cnt, \ + skel->maps.devmap_xmit_cnt_multi }); \ + }) + #define DEFINE_SAMPLE_INIT(name) \ static int sample_init(struct name *skel, int mask) \ { \ @@ -84,6 +97,10 @@ static inline char *safe_strncpy(char *dst, const char *src, size_t size) __attach_tp(tp_xdp_cpumap_kthread); \ if (mask & SAMPLE_EXCEPTION_CNT) \ __attach_tp(tp_xdp_exception); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT) \ + __attach_tp(tp_xdp_devmap_xmit); \ + if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) \ + __attach_tp(tp_xdp_devmap_xmit_multi); \ return 0; \ } |