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| author | Luca Boccassi <bluca@debian.org> | 2024-05-28 19:59:24 +0200 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2024-05-29 08:29:47 +0200 |
| commit | 8e495bf0b7c2c6a86ce2af9f49f888c281203eb6 (patch) | |
| tree | 0f139c6bf14e88e23b385e479bd7fc2897afad19 /src/shared/bpf-link.c | |
| parent | test-network: update comment about status of kernel regression (diff) | |
| download | systemd-8e495bf0b7c2c6a86ce2af9f49f888c281203eb6.tar.xz systemd-8e495bf0b7c2c6a86ce2af9f49f888c281203eb6.zip | |
bpf: add helper to translate kernel error codes from libbpf
libbpf returns error codes from the kernel unmodified, and we don't understand
them so non-fatal ones are handled as hard errors.
Add a translation helper, and start by translating 524 to EOPNOTSUPP, which is
returned when nsresourced tries to use LSM BPF hooks that are not
implemented on a given arch (in this case, arm64 is misssing trampolines).
Fixes https://github.com/systemd/systemd/issues/32170
Diffstat (limited to '')
| -rw-r--r-- | src/shared/bpf-link.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/shared/bpf-link.c b/src/shared/bpf-link.c index fea49b2ecb..77f6a4ee9a 100644 --- a/src/shared/bpf-link.c +++ b/src/shared/bpf-link.c @@ -16,7 +16,7 @@ bool bpf_can_link_program(struct bpf_program *prog) { link = sym_bpf_program__attach_cgroup(prog, /*cgroup_fd=*/-1); /* EBADF indicates that bpf_link is supported by kernel. */ - return sym_libbpf_get_error(link) == -EBADF; + return bpf_get_error_translated(link) == -EBADF; } int bpf_serialize_link(FILE *f, FDSet *fds, const char *key, struct bpf_link *link) { @@ -25,7 +25,7 @@ int bpf_serialize_link(FILE *f, FDSet *fds, const char *key, struct bpf_link *li if (!link) return -ENOENT; - if (sym_libbpf_get_error(link) != 0) + if (bpf_get_error_translated(link) != 0) return -EINVAL; return serialize_fd(f, fds, key, sym_bpf_link__fd(link)); |