linux/tools/bpf/bpftool
Benjamin Poirier 3da6e7e408 bpftool: Improve handling of ENOSPC on reuseport_array map dumps
avoids outputting a series of
	value:
	No space left on device

The value itself is not wrong but bpf_fd_reuseport_array_lookup_elem() can
only return it if the map was created with value_size = 8. There's nothing
bpftool can do about it. Instead of repeating this error for every key in
the map, print an explanatory warning and a specialized error.

example before:
key: 00 00 00 00
value:
No space left on device
key: 01 00 00 00
value:
No space left on device
key: 02 00 00 00
value:
No space left on device
Found 0 elements

example after:
Warning: cannot read values from reuseport_sockarray map with value_size != 8
key: 00 00 00 00  value: <cannot read>
key: 01 00 00 00  value: <cannot read>
key: 02 00 00 00  value: <cannot read>
Found 0 elements

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-04-16 10:16:33 +02:00
..
bash-completion bpf: bpftool, fix documentation for attach types 2019-02-19 17:23:18 +01:00
Documentation tools: bpftool: add a note on program statistics in man page 2019-04-16 10:13:37 +02:00
.gitignore tools/bpftool: ignore build products 2018-07-26 02:50:26 +02:00
btf_dumper.c bpf: bpftool support for dumping data/bss/rodata sections 2019-04-09 17:05:47 -07:00
cfg.c tools: bpftool: teach cfg code about JMP32 2019-01-26 13:33:01 -08:00
cfg.h tools: bpftool: replace Netronome boilerplate with SPDX license headers 2018-12-13 12:08:44 +01:00
cgroup.c tools: bpftool: reset errno for "bpftool cgroup tree" 2019-04-16 10:13:21 +02:00
common.c tools: bpftool: fix crash with un-owned prog arrays 2019-01-28 23:59:46 +01:00
feature.c bpftool: feature probing, change default action 2019-01-24 10:47:52 +01:00
jit_disasm.c tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
json_writer.c tools: bpftool: Cleanup license mess 2019-01-18 15:26:54 -08:00
json_writer.h tools: bpftool: Cleanup license mess 2019-01-18 15:26:54 -08:00
main.c tools: bpftool: add basic probe capability, probe syscall availability 2019-01-22 22:15:40 -08:00
main.h tools: bpftool: add probes for eBPF map types 2019-01-22 22:15:40 -08:00
Makefile tools/bpf: properly account for libbfd variations 2019-01-16 00:53:48 +01:00
map_perf_ring.c tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
map.c bpftool: Improve handling of ENOSPC on reuseport_array map dumps 2019-04-16 10:16:33 +02:00
net.c tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
netlink_dumper.c tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
netlink_dumper.h tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
perf.c tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
prog.c tools: bpftool: remove blank line after btf_id when listing programs 2019-04-16 10:13:12 +02:00
tracelog.c tools: bpftool: add an option to prevent auto-mount of bpffs, tracefs 2018-12-18 14:47:17 +01:00
xlated_dumper.c bpf: implement lookup-free direct value access for maps 2019-04-09 17:05:46 -07:00
xlated_dumper.h tools: bpftool: replace Netronome boilerplate with SPDX license headers 2018-12-13 12:08:44 +01:00