From: Andrii Nakryiko <andrii@kernel.org>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>, <ast@fb.com>,
<daniel@iogearbox.net>
Cc: <andrii@kernel.org>, <kernel-team@fb.com>,
Lorenz Bauer <lmb@cloudflare.com>
Subject: [PATCH bpf-next 2/5] libbpf: support BTF_KIND_FLOAT during type compatibility checks in CO-RE
Date: Fri, 23 Apr 2021 16:30:55 -0700 [thread overview]
Message-ID: <20210423233058.3386115-3-andrii@kernel.org> (raw)
In-Reply-To: <20210423233058.3386115-1-andrii@kernel.org>
Add BTF_KIND_FLOAT support when doing CO-RE field type compatibility check.
Without this, relocations against float/double fields will fail.
Also adjust one error message to emit instruction index instead of less
convenient instruction byte offset.
Fixes: 22541a9eeb0d ("libbpf: Add BTF_KIND_FLOAT support")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
tools/lib/bpf/libbpf.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index a1cddd17af7d..ff54ffef433a 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -5141,6 +5141,7 @@ static int bpf_core_fields_are_compat(const struct btf *local_btf,
switch (btf_kind(local_type)) {
case BTF_KIND_PTR:
+ case BTF_KIND_FLOAT:
return 1;
case BTF_KIND_FWD:
case BTF_KIND_ENUM: {
@@ -6245,8 +6246,8 @@ static int bpf_core_apply_relo(struct bpf_program *prog,
/* bpf_core_patch_insn() should know how to handle missing targ_spec */
err = bpf_core_patch_insn(prog, relo, relo_idx, &targ_res);
if (err) {
- pr_warn("prog '%s': relo #%d: failed to patch insn at offset %d: %d\n",
- prog->name, relo_idx, relo->insn_off, err);
+ pr_warn("prog '%s': relo #%d: failed to patch insn #%zu: %d\n",
+ prog->name, relo_idx, relo->insn_off / BPF_INSN_SZ, err);
return -EINVAL;
}
--
2.30.2
next prev parent reply other threads:[~2021-04-23 23:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 23:30 [PATCH bpf-next 0/5] CO-RE relocation selftests fixes Andrii Nakryiko
2021-04-23 23:30 ` [PATCH bpf-next 1/5] selftests/bpf: add remaining ASSERT_xxx() variants Andrii Nakryiko
2021-04-26 8:05 ` Lorenz Bauer
2021-04-26 15:50 ` Andrii Nakryiko
2021-04-26 15:59 ` Toke Høiland-Jørgensen
2021-04-26 16:15 ` Andrii Nakryiko
2021-04-26 16:44 ` Toke Høiland-Jørgensen
2021-04-23 23:30 ` Andrii Nakryiko [this message]
2021-04-26 8:07 ` [PATCH bpf-next 2/5] libbpf: support BTF_KIND_FLOAT during type compatibility checks in CO-RE Lorenz Bauer
2021-04-23 23:30 ` [PATCH bpf-next 3/5] selftests/bpf: fix BPF_CORE_READ_BITFIELD() macro Andrii Nakryiko
2021-04-26 8:10 ` Lorenz Bauer
2021-04-23 23:30 ` [PATCH bpf-next 4/5] selftests/bpf: fix field existence CO-RE reloc tests Andrii Nakryiko
2021-04-26 8:12 ` Lorenz Bauer
2021-04-23 23:30 ` [PATCH bpf-next 5/5] selftests/bpf: fix core_reloc test runner Andrii Nakryiko
2021-04-26 8:16 ` Lorenz Bauer
2021-04-26 15:55 ` Andrii Nakryiko
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