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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2021-08-21 05:49:53 +0530 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-08-24 14:48:40 -0700 |
| commit | 1d930fd2cdbf5e156c32c73ea7f3d5b12bdc41d7 (patch) | |
| tree | 06ac3ca25541b0c90b439bb4cfa4548b957022d4 /samples/bpf/xdp_sample_user.h | |
| parent | 323140389405e5d5d2020b2e3e04863d12cf3e32 (diff) | |
| download | linux-1d930fd2cdbf5e156c32c73ea7f3d5b12bdc41d7.tar.gz linux-1d930fd2cdbf5e156c32c73ea7f3d5b12bdc41d7.tar.bz2 linux-1d930fd2cdbf5e156c32c73ea7f3d5b12bdc41d7.zip | |
samples: bpf: Add redirect tracepoint statistics support
This implements per-errno reporting (for the ones we explicitly
recognize), adds some help output, and implements the stats retrieval
and printing functions.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-6-memxor@gmail.com
Diffstat (limited to 'samples/bpf/xdp_sample_user.h')
| -rw-r--r-- | samples/bpf/xdp_sample_user.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/samples/bpf/xdp_sample_user.h b/samples/bpf/xdp_sample_user.h index d630998df547..1935a0e2f85b 100644 --- a/samples/bpf/xdp_sample_user.h +++ b/samples/bpf/xdp_sample_user.h @@ -10,6 +10,10 @@ enum stats_mask { _SAMPLE_REDIRECT_MAP = 1U << 0, SAMPLE_RX_CNT = 1U << 1, + SAMPLE_REDIRECT_ERR_CNT = 1U << 2, + 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, }; /* Exit return codes */ @@ -47,6 +51,15 @@ static inline char *safe_strncpy(char *dst, const char *src, size_t size) } #pragma GCC diagnostic pop +#define __attach_tp(name) \ + ({ \ + if (!bpf_program__is_tracing(skel->progs.name)) \ + return -EINVAL; \ + skel->links.name = bpf_program__attach(skel->progs.name); \ + if (!skel->links.name) \ + return -errno; \ + }) + #define DEFINE_SAMPLE_INIT(name) \ static int sample_init(struct name *skel, int mask) \ { \ @@ -54,6 +67,14 @@ static inline char *safe_strncpy(char *dst, const char *src, size_t size) ret = __sample_init(mask); \ if (ret < 0) \ return ret; \ + if (mask & SAMPLE_REDIRECT_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map); \ + if (mask & SAMPLE_REDIRECT_CNT) \ + __attach_tp(tp_xdp_redirect); \ + if (mask & SAMPLE_REDIRECT_ERR_MAP_CNT) \ + __attach_tp(tp_xdp_redirect_map_err); \ + if (mask & SAMPLE_REDIRECT_ERR_CNT) \ + __attach_tp(tp_xdp_redirect_err); \ return 0; \ } |