diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2024-01-23 18:21:25 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-01-24 16:21:03 -0800 |
| commit | cac270ad79afe212ed7986e8d271c72521cd8212 (patch) | |
| tree | 704597af62843f5a714b1c4668bf3d8ed2d81220 /tools/lib/bpf/libbpf.c | |
| parent | b73d08d1318a2dde5bacbab77d0e2fd2aa47c933 (diff) | |
libbpf: Support BPF token path setting through LIBBPF_BPF_TOKEN_PATH envvar
To allow external admin authority to override default BPF FS location
(/sys/fs/bpf) for implicit BPF token creation, teach libbpf to recognize
LIBBPF_BPF_TOKEN_PATH envvar. If it is specified and user application
didn't explicitly specify bpf_token_path option, it will be treated
exactly like bpf_token_path option, overriding default /sys/fs/bpf
location and making BPF token mandatory.
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20240124022127.2379740-29-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index cefa607be335..fa7094ff3e66 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -7604,6 +7604,12 @@ static struct bpf_object *bpf_object_open(const char *path, const void *obj_buf, return ERR_PTR(-EINVAL); token_path = OPTS_GET(opts, bpf_token_path, NULL); + /* if user didn't specify bpf_token_path explicitly, check if + * LIBBPF_BPF_TOKEN_PATH envvar was set and treat it as bpf_token_path + * option + */ + if (!token_path) + token_path = getenv("LIBBPF_BPF_TOKEN_PATH"); if (token_path && strlen(token_path) >= PATH_MAX) return ERR_PTR(-ENAMETOOLONG); |