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| author | Leon Hwang <hffilwlqm@gmail.com> | 2023-08-01 22:26:20 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-08-02 14:21:12 -0700 |
| commit | bf4ea1d0b2cb2251f9e5619c81daa98591087c33 (patch) | |
| tree | f23d51c0091df06cb2cf045bcb1f099ea9d4c225 /include/trace | |
| parent | 416c6d01244ecbf0abfdb898fd091b50ef951b48 (diff) | |
| download | linux-bf4ea1d0b2cb2251f9e5619c81daa98591087c33.tar.gz linux-bf4ea1d0b2cb2251f9e5619c81daa98591087c33.tar.bz2 linux-bf4ea1d0b2cb2251f9e5619c81daa98591087c33.zip | |
bpf, xdp: Add tracepoint to xdp attaching failure
When error happens in dev_xdp_attach(), it should have a way to tell
users the error message like the netlink approach.
To avoid breaking uapi, adding a tracepoint in bpf_xdp_link_attach() is
an appropriate way to notify users the error message.
Hence, bpf libraries are able to retrieve the error message by this
tracepoint, and then report the error message to users.
Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
Link: https://lore.kernel.org/r/20230801142621.7925-2-hffilwlqm@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/xdp.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/trace/events/xdp.h b/include/trace/events/xdp.h index c40fc97f9417..cd89f1d5ce7b 100644 --- a/include/trace/events/xdp.h +++ b/include/trace/events/xdp.h @@ -404,6 +404,23 @@ TRACE_EVENT(mem_return_failed, ) ); +TRACE_EVENT(bpf_xdp_link_attach_failed, + + TP_PROTO(const char *msg), + + TP_ARGS(msg), + + TP_STRUCT__entry( + __string(msg, msg) + ), + + TP_fast_assign( + __assign_str(msg, msg); + ), + + TP_printk("errmsg=%s", __get_str(msg)) +); + #endif /* _TRACE_XDP_H */ #include <trace/define_trace.h> |