From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33A83C282D7 for ; Tue, 5 Feb 2019 19:48:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06E902080F for ; Tue, 5 Feb 2019 19:48:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="U59xGIgq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729826AbfBETsZ (ORCPT ); Tue, 5 Feb 2019 14:48:25 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:51116 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727138AbfBETsZ (ORCPT ); Tue, 5 Feb 2019 14:48:25 -0500 Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x15JlPJw007224 for ; Tue, 5 Feb 2019 11:48:24 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=facebook; bh=eVsFVXNrrK6sLpkIMgR5ebnx1I2HQfIhUsY5U/wi5VE=; b=U59xGIgqbGfKJOJFCs7Q5X3v5sJeaPEPDvOVOmGQVch/Y1cBSV6vg4F3Ek6fKIOL/pq0 ksa+PYjAvNLsD35fO5vjY52tXCJZHjCEQ+C7MJA64aFnFQ1CjQ7AcdXGBr4x/0E1il0D Hd8tZchHSS4PtmnyWkTq1qJAygrVfdW5XFs= Received: from maileast.thefacebook.com ([199.201.65.23]) by mx0a-00082601.pphosted.com with ESMTP id 2qfgxyg04b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Tue, 05 Feb 2019 11:48:24 -0800 Received: from mx-out.facebook.com (2620:10d:c0a1:3::13) by mail.thefacebook.com (2620:10d:c021:18::173) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1531.3; Tue, 5 Feb 2019 11:48:22 -0800 Received: by devbig003.ftw2.facebook.com (Postfix, from userid 128203) id 1E00E3702852; Tue, 5 Feb 2019 11:48:22 -0800 (PST) Smtp-Origin-Hostprefix: devbig From: Yonghong Song Smtp-Origin-Hostname: devbig003.ftw2.facebook.com To: CC: Alexei Starovoitov , Daniel Borkmann , , Yonghong Song Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH bpf-next 1/2] tools/bpf: add const qualifier to btf__get_map_kv_tids() map_name parameter Date: Tue, 5 Feb 2019 11:48:22 -0800 Message-ID: <20190205194822.1804874-1-yhs@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190205194821.1804747-1-yhs@fb.com> References: <20190205194821.1804747-1-yhs@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-02-05_08:,, signatures=0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Commit 96408c43447a ("tools/bpf: implement libbpf btf__get_map_kv_tids() = API function") added the API function btf__get_map_kv_tids(): btf__get_map_kv_tids(const struct btf *btf, char *map_name, ...) The parameter map_name has type "char *". This is okay inside libbpf libr= ary since the map_name is from bpf_map->name which also has type "char *". This will be problematic if the caller for map_name already has attribute= "const", e.g., from C++ string.c_str(). It will result in either a warning or an e= rror. /home/yhs/work/bcc/src/cc/btf.cc:166:51: error: invalid conversion from =E2=80=98const char*=E2=80=99 to =E2=80= =98char*=E2=80=99 [-fpermissive] return btf__get_map_kv_tids(btf_, map_name.c_str() This patch added "const" attributes to map_name parameter. Fixes: 96408c43447a ("tools/bpf: implement libbpf btf__get_map_kv_tids() = API function") Signed-off-by: Yonghong Song --- tools/lib/bpf/btf.c | 2 +- tools/lib/bpf/btf.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index 4949f8840bda..3b3a2959d03a 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -511,7 +511,7 @@ int btf__get_from_id(__u32 id, struct btf **btf) return err; } =20 -int btf__get_map_kv_tids(const struct btf *btf, char *map_name, +int btf__get_map_kv_tids(const struct btf *btf, const char *map_name, __u32 expected_key_size, __u32 expected_value_size, __u32 *key_type_id, __u32 *value_type_id) { diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index 25a9d2db035d..b393da90cc85 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -69,7 +69,7 @@ LIBBPF_API void btf__get_strings(const struct btf *btf,= const char **strings, __u32 *str_len); LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 = offset); LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); -LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, char *map_nam= e, +LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, const char *m= ap_name, __u32 expected_key_size, __u32 expected_value_size, __u32 *key_type_id, __u32 *value_type_id); --=20 2.17.1