From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Martin KaFai Lau <kafai@fb.com>
Cc: bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Kernel Team <kernel-team@fb.com>,
Networking <netdev@vger.kernel.org>
Subject: Re: [PATCH bpf-next 08/15] libbpf: Refactor bpf_object__resolve_ksyms_btf_id
Date: Thu, 18 Mar 2021 19:53:35 -0700 [thread overview]
Message-ID: <CAEf4BzbYDKf6ahjV1HfH-ZoaWeLQb7me83AnjhF9rZ=uOzhnSQ@mail.gmail.com> (raw)
In-Reply-To: <20210316011426.4178537-1-kafai@fb.com>
On Tue, Mar 16, 2021 at 12:02 AM Martin KaFai Lau <kafai@fb.com> wrote:
>
> This patch refactors most of the logic from
> bpf_object__resolve_ksyms_btf_id() into a new function
> bpf_object__resolve_ksym_var_btf_id().
> It is to get ready for a later patch adding
> bpf_object__resolve_ksym_func_btf_id() which resolves
> a kernel function to the running kernel btf_id.
>
> Signed-off-by: Martin KaFai Lau <kafai@fb.com>
> ---
Acked-by: Andrii Nakryiko <andrii@kernel.org>
> tools/lib/bpf/libbpf.c | 125 ++++++++++++++++++++++-------------------
> 1 file changed, 68 insertions(+), 57 deletions(-)
>
[...]
> +static int bpf_object__resolve_ksyms_btf_id(struct bpf_object *obj)
> +{
> + struct extern_desc *ext;
> + int i, err;
> +
> + for (i = 0; i < obj->nr_extern; i++) {
> + ext = &obj->externs[i];
> + if (ext->type != EXT_KSYM || !ext->ksym.type_id)
> + continue;
> +
> + err = bpf_object__resolve_ksym_var_btf_id(obj, ext);
>
we usually put error checking right on the next line without empty
lines, please remove this distracting empty line
> - ext->is_set = true;
> - ext->ksym.kernel_btf_obj_fd = btf_fd;
> - ext->ksym.kernel_btf_id = id;
> - pr_debug("extern (ksym) '%s': resolved to [%d] %s %s\n",
> - ext->name, id, btf_kind_str(targ_var), targ_var_name);
> + if (err)
> + return err;
> }
> return 0;
> }
> --
> 2.30.2
>
next prev parent reply other threads:[~2021-03-19 2:54 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 1:13 [PATCH bpf-next 00/15] Support calling kernel function Martin KaFai Lau
2021-03-16 1:13 ` [PATCH bpf-next 01/15] bpf: Simplify freeing logic in linfo and jited_linfo Martin KaFai Lau
2021-03-16 1:13 ` [PATCH bpf-next 02/15] bpf: btf: Support parsing extern func Martin KaFai Lau
2021-03-18 22:53 ` Andrii Nakryiko
2021-03-18 23:39 ` Martin KaFai Lau
2021-03-19 4:13 ` Andrii Nakryiko
2021-03-19 5:29 ` Martin KaFai Lau
2021-03-19 21:27 ` Andrii Nakryiko
2021-03-19 22:19 ` Martin KaFai Lau
2021-03-19 22:29 ` Andrii Nakryiko
2021-03-19 22:45 ` Martin KaFai Lau
2021-03-19 23:02 ` Andrii Nakryiko
2021-03-20 0:13 ` Martin KaFai Lau
2021-03-20 17:18 ` Andrii Nakryiko
2021-03-23 4:55 ` Martin KaFai Lau
2021-03-16 1:13 ` [PATCH bpf-next 03/15] bpf: Refactor btf_check_func_arg_match Martin KaFai Lau
2021-03-18 23:32 ` Andrii Nakryiko
2021-03-19 19:32 ` Martin KaFai Lau
2021-03-19 21:51 ` Andrii Nakryiko
2021-03-20 0:10 ` Alexei Starovoitov
2021-03-20 17:13 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 04/15] bpf: Support bpf program calling kernel function Martin KaFai Lau
2021-03-19 1:03 ` Andrii Nakryiko
2021-03-19 1:51 ` Alexei Starovoitov
2021-03-19 19:47 ` Martin KaFai Lau
2021-03-16 1:14 ` [PATCH bpf-next 05/15] bpf: Support kernel function call in x86-32 Martin KaFai Lau
2021-03-16 1:14 ` [PATCH bpf-next 06/15] tcp: Rename bictcp function prefix to cubictcp Martin KaFai Lau
2021-03-16 1:14 ` [PATCH bpf-next 07/15] bpf: tcp: White list some tcp cong functions to be called by bpf-tcp-cc Martin KaFai Lau
2021-03-19 1:19 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 08/15] libbpf: Refactor bpf_object__resolve_ksyms_btf_id Martin KaFai Lau
2021-03-19 2:53 ` Andrii Nakryiko [this message]
2021-03-16 1:14 ` [PATCH bpf-next 09/15] libbpf: Refactor codes for finding btf id of a kernel symbol Martin KaFai Lau
2021-03-19 3:14 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 10/15] libbpf: Rename RELO_EXTERN to RELO_EXTERN_VAR Martin KaFai Lau
2021-03-19 3:15 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 11/15] libbpf: Record extern sym relocation first Martin KaFai Lau
2021-03-19 3:16 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 12/15] libbpf: Support extern kernel function Martin KaFai Lau
2021-03-19 4:11 ` Andrii Nakryiko
2021-03-19 5:06 ` Martin KaFai Lau
2021-03-19 21:38 ` Andrii Nakryiko
2021-03-16 1:14 ` [PATCH bpf-next 13/15] bpf: selftests: Rename bictcp to bpf_cubic Martin KaFai Lau
2021-03-19 4:14 ` Andrii Nakryiko
2021-03-16 1:15 ` [PATCH bpf-next 14/15] bpf: selftest: bpf_cubic and bpf_dctcp calling kernel functions Martin KaFai Lau
2021-03-19 4:15 ` Andrii Nakryiko
2021-03-16 1:15 ` [PATCH bpf-next 15/15] bpf: selftest: Add kfunc_call test Martin KaFai Lau
2021-03-16 3:39 ` kernel test robot
2021-03-19 4:21 ` Andrii Nakryiko
2021-03-19 5:40 ` Martin KaFai Lau
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