On Wed, 19 Dec 2018 17:52:40 +0900, Taeung Song wrote:
> We need to let users check their wrong section name
> with proper section names when failed to get proper type from it.
> Because there is no knowing what kind of section name can be used.
# bpftool prog help
Usage: bpftool prog { show | list } [PROG]
[...]
TYPE := { socket | kprobe | kretprobe | classifier | action |
tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |
cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |
lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |
sk_reuseport | flow_dissector |
cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |
cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |
cgroup/sendmsg4 | cgroup/sendmsg6 }
ATTACH_TYPE := { msg_verdict | skb_verdict | skb_parse |
flow_dissector }
OPTIONS := { {-j|--json} [{-p|--pretty}] | {-f|--bpffs} |
{-m|--mapcompat} | {-n|--nomount} }
Also in man bpftool-prog.
Perhaps we could just point users to that info? IMHO having libraries
unconditionally print warnings is not great..
> For example, when a 'cgroup' section name of a BPF program is used,
>
> Before:
>
> $ bpftool prog load bpf-prog.o /sys/fs/bpf/prog1
> Error: failed to guess program type based on section name cgroup
>
> After:
>
> libbpf: failed to guess program type based on section name 'cgroup'
> libbpf: possible section(type) names are: socket kprobe/ kretprobe/
> classifier action tracepoint/ raw_tracepoint/ xdp perf_event lwt_in lwt_out
> lwt_xmit lwt_seg6local cgroup_skb/ingress cgroup_skb/egress cgroup/skb
> cgroup/sock cgroup/post_bind4 cgroup/post_bind6 cgroup/dev sockops
> sk_skb/stream_parser sk_skb/stream_verdict sk_skb sk_msg lirc_mode2
> flow_dissector cgroup/bind4 cgroup/bind6 cgroup/connect4 cgroup/connect6
> cgroup/sendmsg4 cgroup/sendmsg6
>
> Cc: Jakub Kicinski <[email protected]>
> Cc: Andrey Ignatov <[email protected]>
> Signed-off-by: Taeung Song <[email protected]>
