Hechao Li 4783bf08f8 bpf: Print error message for bpftool cgroup show ... [ Upstream commit 1162f84403 ] Currently, when bpftool cgroup show <path> has an error, no error message is printed. This is confusing because the user may think the result is empty. Before the change: $ bpftool cgroup show /sys/fs/cgroup ID AttachType AttachFlags Name $ echo $? 255 After the change: $ ./bpftool cgroup show /sys/fs/cgroup Error: can't query bpf programs attached to /sys/fs/cgroup: Operation not permitted v2: Rename check_query_cgroup_progs to cgroup_has_attached_progs Signed-off-by: Hechao Li <hechaol@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191224011742.3714301-1-hechaol@fb.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-02-24 08:36:40 +01:00
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bpftool	bpf: Print error message for bpftool cgroup show	2020-02-24 08:36:40 +01:00
.gitignore	tools: bpf: account for generated feature/ and libbpf/ directories	2019-08-31 00:38:16 +02:00
Makefile	tools, bpf: Fix build for 'make -s tools/bpf O=<dir>'	2019-12-31 16:45:47 +01:00
Makefile.helpers	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
bpf_asm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00
bpf_dbg.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00
bpf_exp.l	bpf: fix cbpf parser bug for octal numbers	2018-06-03 07:46:55 -07:00
bpf_exp.y	tools: rename tools/net directory to tools/bpf	2017-10-04 21:45:05 -07:00
bpf_jit_disasm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00