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| author |   Alan Maguire <alan.maguire@oracle.com> | 2020-09-28 12:31:03 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-09-28 18:26:58 -0700 |
| commit | 76654e67f3a01c50dc13dd6dea75e58943413956 (patch) | |
| tree | f976fd5c02589db4e9fe3673240fcf716f6bba56 /kernel/bpf | |
| parent | libbpf: Add btf__new_empty() to create an empty BTF object (diff) | |
| download | linux-dev-76654e67f3a01c50dc13dd6dea75e58943413956.tar.xz linux-dev-76654e67f3a01c50dc13dd6dea75e58943413956.zip | |
bpf: Provide function to get vmlinux BTF information
It will be used later for BPF structure display support
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/1601292670-1616-2-git-send-email-alan.maguire@oracle.com
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/verifier.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 7ff05a79984a..2ee343dda73a 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -11533,6 +11533,17 @@ static int check_attach_btf_id(struct bpf_verifier_env *env) return 0; } +struct btf *bpf_get_btf_vmlinux(void) +{ + if (!btf_vmlinux && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) { + mutex_lock(&bpf_verifier_lock); + if (!btf_vmlinux) + btf_vmlinux = btf_parse_vmlinux(); + mutex_unlock(&bpf_verifier_lock); + } + return btf_vmlinux; +} + int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, union bpf_attr __user *uattr) { @@ -11566,12 +11577,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, env->ops = bpf_verifier_ops[env->prog->type]; is_priv = bpf_capable(); - if (!btf_vmlinux && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) { - mutex_lock(&bpf_verifier_lock); - if (!btf_vmlinux) - btf_vmlinux = btf_parse_vmlinux(); - mutex_unlock(&bpf_verifier_lock); - } + bpf_get_btf_vmlinux(); /* grab the mutex to protect few globals used by verifier */ if (!is_priv) |