mirror/libbpf
1
0
Fork 0
mirror of https://github.com/netdata/libbpf.git synced 2026-03-26 03:09:07 +08:00
Code Issues Packages Projects Releases Wiki Activity

libbpf: Allow to augment system Kconfig through extra optional config

Browse Source 
Instead of all or nothing approach of overriding Kconfig file location, allow
to extend it with extra values and override chosen subset of values though
optional user-provided extra config, passed as a string through open options'
.kconfig option. If same config key is present in both user-supplied config
and Kconfig, user-supplied one wins. This allows applications to more easily
test various conditions despite host kernel's real configuration. If all of
BPF object's __kconfig externs are satisfied from user-supplied config, system
Kconfig won't be read at all.

Simplify selftests by not needing to create temporary Kconfig files.

Suggested-by: Alexei Starovoitov <ast@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191219002837.3074619-3-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2019-12-18 16:28:35 -08:00
committed by Andrii Nakryiko
parent 9f61b5b95c
commit 5bc09e54fa
2 changed files with 131 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/libbpf.h
View File

@@ -85,12 +85,12 @@ struct bpf_object_open_opts {
*/
const char *pin_root_path;
__u32 attach_prog_fd;
/* kernel config file path override (for CONFIG_ externs); can point
* to either uncompressed text file or .gz file
/* Additional kernel config content that augments and overrides
* system Kconfig for CONFIG_xxx externs.
*/
const char *kconfig_path;
const char *kconfig;
};
#define bpf_object_open_opts__last_field kconfig_path
#define bpf_object_open_opts__last_field kconfig
LIBBPF_API struct bpf_object *bpf_object__open(const char *path);
LIBBPF_API struct bpf_object *