From patchwork Thu May 19 21:29:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856064 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FC68C433EF for ; Thu, 19 May 2022 21:30:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229710AbiESVaM (ORCPT ); Thu, 19 May 2022 17:30:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234524AbiESVaJ (ORCPT ); Thu, 19 May 2022 17:30:09 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EFFCDA76C3 for ; Thu, 19 May 2022 14:30:07 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 9FD71240027 for ; Thu, 19 May 2022 23:30:06 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995806; bh=zhp/Av1QmialMiCVM6cQOVLUoyoWJhEL9vUY0WSbfvQ=; h=From:To:Cc:Subject:Date:From; b=FT//IDXaisDtbBthlZ5fBNFF7bHcCrUNwYLfGEUQnjZEFB80pqP061PBmXYs4g8Fx rkYHtvyGW5SNOVbUTtClvGMlVPTF6qFN0tKCyH7hDDeXUtRkP5aXtLJKP8bxNiVdQ5 XurBvpQlE4nNOV4AXHMSdkMNOh/7VzglP1DAVbVbuUas1x9It58gtho2zEqTcuJvkt T03dv3uLrCtG2gY3Z93nNG9O/ikCngCj7mXWf8FMZP84AZgWL9ze599wkuwGoD1CPZ dWzYxOyn5lW8jce4ujtV65k/VLkCO9IN2NSw2rrUOezraOq4ZcKaRVB2DXas23jaBi BYns38ZvhMH1g== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L430s6WCbz6tp6; Thu, 19 May 2022 23:30:05 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 01/12] libbpf: Introduce libbpf_bpf_prog_type_str Date: Thu, 19 May 2022 21:29:50 +0000 Message-Id: <20220519213001.729261-2-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change introduces a new function, libbpf_bpf_prog_type_str, to the public libbpf API. The function allows users to get a string representation for a bpf_prog_type variant. Signed-off-by: Daniel Müller --- tools/lib/bpf/libbpf.c | 43 ++++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/libbpf.h | 9 +++++++++ tools/lib/bpf/libbpf.map | 3 +++ 3 files changed, 55 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index ef7f30..6b9c0f 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -72,6 +72,41 @@ static struct bpf_map *bpf_object__add_map(struct bpf_object *obj); static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog); +static const char * const prog_type_name[] = { + [BPF_PROG_TYPE_UNSPEC] = "unspec", + [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter", + [BPF_PROG_TYPE_KPROBE] = "kprobe", + [BPF_PROG_TYPE_SCHED_CLS] = "sched_cls", + [BPF_PROG_TYPE_SCHED_ACT] = "sched_act", + [BPF_PROG_TYPE_TRACEPOINT] = "tracepoint", + [BPF_PROG_TYPE_XDP] = "xdp", + [BPF_PROG_TYPE_PERF_EVENT] = "perf_event", + [BPF_PROG_TYPE_CGROUP_SKB] = "cgroup_skb", + [BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup_sock", + [BPF_PROG_TYPE_LWT_IN] = "lwt_in", + [BPF_PROG_TYPE_LWT_OUT] = "lwt_out", + [BPF_PROG_TYPE_LWT_XMIT] = "lwt_xmit", + [BPF_PROG_TYPE_SOCK_OPS] = "sock_ops", + [BPF_PROG_TYPE_SK_SKB] = "sk_skb", + [BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device", + [BPF_PROG_TYPE_SK_MSG] = "sk_msg", + [BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint", + [BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr", + [BPF_PROG_TYPE_LWT_SEG6LOCAL] = "lwt_seg6local", + [BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2", + [BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport", + [BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector", + [BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl", + [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable", + [BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt", + [BPF_PROG_TYPE_TRACING] = "tracing", + [BPF_PROG_TYPE_STRUCT_OPS] = "struct_ops", + [BPF_PROG_TYPE_EXT] = "ext", + [BPF_PROG_TYPE_LSM] = "lsm", + [BPF_PROG_TYPE_SK_LOOKUP] = "sk_lookup", + [BPF_PROG_TYPE_SYSCALL] = "syscall", +}; + static int __base_pr(enum libbpf_print_level level, const char *format, va_list args) { @@ -9300,6 +9335,14 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type, return libbpf_err(-ESRCH); } +const char *libbpf_bpf_prog_type_str(enum bpf_prog_type t) +{ + if (t < 0 || t >= ARRAY_SIZE(prog_type_name)) + return NULL; + + return prog_type_name[t]; +} + static struct bpf_map *find_struct_ops_map_by_offset(struct bpf_object *obj, size_t offset) { diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 9e9a3f..11b5f8c 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -51,6 +51,15 @@ enum libbpf_errno { LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size); +/** + * @brief **libbpf_bpf_prog_type_str()** converts the provided program type + * value into a textual representation. + * @param t The program type. + * @return Pointer to a static string identifying the program type. NULL is + * returned for unknown **bpf_prog_type** values. + */ +LIBBPF_API const char *libbpf_bpf_prog_type_str(enum bpf_prog_type t); + enum libbpf_print_level { LIBBPF_WARN, LIBBPF_INFO, diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 52973c..b12d290 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -461,5 +461,8 @@ LIBBPF_0.8.0 { } LIBBPF_0.7.0; LIBBPF_1.0.0 { + global: + libbpf_bpf_prog_type_str; + local: *; }; From patchwork Thu May 19 21:29:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856065 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9FE14C433FE for ; Thu, 19 May 2022 21:30:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234524AbiESVaM (ORCPT ); Thu, 19 May 2022 17:30:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234554AbiESVaL (ORCPT ); Thu, 19 May 2022 17:30:11 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 430C36E8CD for ; Thu, 19 May 2022 14:30:10 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id DBEC4240028 for ; Thu, 19 May 2022 23:30:08 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995808; bh=JKxU953oDp162p6Ydm5IYnqz22nVkzABsQ7Fc6fwFrM=; h=From:To:Cc:Subject:Date:From; b=oYkWWbCHwGVFpxtWLDktlEryROMepxVT49KzTKXSLObGcYmD9oogoG8+k2bP8YWzP uFhRnsmMn3WW8fhwls8kKK5/J9Wipxdm3yBCNt6bcOf6zTSg6FKAJVyDShz78k2bPN rtsx8Yg2oqXR4IWQzi6H7bkjKA7R+9BpxggKAXUxSKRMc+w30qWWBnMMhx+4NPNVPz mNtE9dfIEYSw8pJ1iBAvOcYmsdyWq/ZlD+Jo2/6MDzfTfe4rv+Bk3tqoLTTyd9/jmH BtMfV8oqmFUOzLXe+Mm2D0SaQn27ikQ+AVO5UZqrbr5xXwXA3DMCUdyydbx7XC7TLZ q7it9Z2uw1Z3g== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L430w19mtz9rxD; Thu, 19 May 2022 23:30:08 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 02/12] selftests/bpf: Add test for libbpf_bpf_prog_type_str Date: Thu, 19 May 2022 21:29:51 +0000 Message-Id: <20220519213001.729261-3-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change adds a test for libbpf_bpf_prog_type_str. The test retrieves all variants of the bpf_prog_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller --- .../selftests/bpf/prog_tests/libbpf_str.c | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/libbpf_str.c diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c new file mode 100644 index 0000000..3e7a14 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ + +#include +#include +#include + +/** + * Utility function uppercasing an entire string. + */ +static void uppercase(char *s) +{ + for (; *s != '\0'; s++) + *s = toupper(*s); +} + +/** + * Test case to check that all bpf_prog_type variants are covered by + * libbpf_bpf_prog_type_str. + */ +void test_libbpf_bpf_prog_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_prog_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_prog_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_prog_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_prog_type prog_type = (enum bpf_prog_type)e->val; + const char *prog_type_name; + const char *prog_type_str; + char buf[256]; + + prog_type_name = btf__str_by_offset(btf, e->name_off); + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + ASSERT_OK_PTR(prog_type_str, prog_type_name); + + snprintf(buf, sizeof(buf), "BPF_PROG_TYPE_%s", prog_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, prog_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} From patchwork Thu May 19 21:29:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856066 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8BD2C433F5 for ; Thu, 19 May 2022 21:30:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234554AbiESVaP (ORCPT ); Thu, 19 May 2022 17:30:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234542AbiESVaO (ORCPT ); Thu, 19 May 2022 17:30:14 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3990A76C3 for ; Thu, 19 May 2022 14:30:12 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 4153A240109 for ; Thu, 19 May 2022 23:30:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995811; bh=j20Gk1DC+JWIZo+Ph64+yPqH+z6bgueMByJv+lEjems=; h=From:To:Cc:Subject:Date:From; b=msDVyUOIPUzy/Zeiqka9tVTMrF9WyLWWBECPMqT67qmTB8+21+8bz/YOs/LGuXQih LTCxbJDxYiVxBrPlcxrhzVzWC4C03VTm8bmDdJ3UMSMuEynU9uwmG8rub7c/B5VnFo GTWFwGkAEITCfhzJWNJ5YMKrZ+5Ja51xWc3VQ4uIVVx7GwmCY0bIof/MpYE97d2xnZ fmXyhcuFz845JQIanh12cuZtgdJRplj2ymhyK9iIbFroEg9O1lj6Szx5/Mm8hHnrcB bhog72IENameV3f/D1R+l9I4Vh3KaKpJpu8XJaUvGzWidz1t1f8qMC284sq/p0fTND IKgXBYLCITscQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L430y2nWhz6tmW; Thu, 19 May 2022 23:30:10 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 03/12] bpftool: Use libbpf_bpf_prog_type_str Date: Thu, 19 May 2022 21:29:52 +0000 Message-Id: <20220519213001.729261-4-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change switches bpftool over to using the recently introduced libbpf_bpf_prog_type_str function instead of maintaining its own string representation for the bpf_prog_type enum. Signed-off-by: Daniel Müller --- tools/bpf/bpftool/feature.c | 57 +++++++++++++++++++++++-------------- tools/bpf/bpftool/link.c | 19 +++++++------ tools/bpf/bpftool/main.h | 3 -- tools/bpf/bpftool/map.c | 13 +++++---- tools/bpf/bpftool/prog.c | 51 ++++++--------------------------- 5 files changed, 64 insertions(+), 79 deletions(-) diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c index d12f460..02753f 100644 --- a/tools/bpf/bpftool/feature.c +++ b/tools/bpf/bpftool/feature.c @@ -548,8 +548,8 @@ static bool probe_prog_type_ifindex(enum bpf_prog_type prog_type, __u32 ifindex) } static void -probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types, - const char *define_prefix, __u32 ifindex) +probe_prog_type(enum bpf_prog_type prog_type, const char *prog_type_str, + bool *supported_types, const char *define_prefix, __u32 ifindex) { char feat_name[128], plain_desc[128], define_name[128]; const char *plain_comment = "eBPF program_type "; @@ -580,20 +580,16 @@ probe_prog_type(enum bpf_prog_type prog_type, bool *supported_types, supported_types[prog_type] |= res; - if (!prog_type_name[prog_type]) { - p_info("program type name not found (type %d)", prog_type); - return; - } maxlen = sizeof(plain_desc) - strlen(plain_comment) - 1; - if (strlen(prog_type_name[prog_type]) > maxlen) { + if (strlen(prog_type_str) > maxlen) { p_info("program type name too long"); return; } - sprintf(feat_name, "have_%s_prog_type", prog_type_name[prog_type]); - sprintf(define_name, "%s_prog_type", prog_type_name[prog_type]); + sprintf(feat_name, "have_%s_prog_type", prog_type_str); + sprintf(define_name, "%s_prog_type", prog_type_str); uppercase(define_name, sizeof(define_name)); - sprintf(plain_desc, "%s%s", plain_comment, prog_type_name[prog_type]); + sprintf(plain_desc, "%s%s", plain_comment, prog_type_str); print_bool_feature(feat_name, plain_desc, define_name, res, define_prefix); } @@ -728,10 +724,10 @@ probe_helper_for_progtype(enum bpf_prog_type prog_type, bool supported_type, } static void -probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type, +probe_helpers_for_progtype(enum bpf_prog_type prog_type, + const char *prog_type_str, bool supported_type, const char *define_prefix, __u32 ifindex) { - const char *ptype_name = prog_type_name[prog_type]; char feat_name[128]; unsigned int id; bool probe_res = false; @@ -747,12 +743,12 @@ probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type, } if (json_output) { - sprintf(feat_name, "%s_available_helpers", ptype_name); + sprintf(feat_name, "%s_available_helpers", prog_type_str); jsonw_name(json_wtr, feat_name); jsonw_start_array(json_wtr); } else if (!define_prefix) { printf("eBPF helpers supported for program type %s:", - ptype_name); + prog_type_str); } for (id = 1; id < ARRAY_SIZE(helper_name); id++) { @@ -768,7 +764,7 @@ probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type, /* fallthrough */ default: probe_res |= probe_helper_for_progtype(prog_type, supported_type, - define_prefix, id, ptype_name, + define_prefix, id, prog_type_str, ifindex); } } @@ -943,15 +939,24 @@ static void section_program_types(bool *supported_types, const char *define_prefix, __u32 ifindex) { - unsigned int i; + unsigned int prog_type = BPF_PROG_TYPE_UNSPEC; + const char *prog_type_str; print_start_section("program_types", "Scanning eBPF program types...", "/*** eBPF program types ***/", define_prefix); - for (i = BPF_PROG_TYPE_UNSPEC + 1; i < prog_type_name_size; i++) - probe_prog_type(i, supported_types, define_prefix, ifindex); + while (true) { + prog_type++; + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + /* libbpf will return NULL for variants unknown to it. */ + if (!prog_type_str) + break; + + probe_prog_type(prog_type, prog_type_str, supported_types, define_prefix, + ifindex); + } print_end_section(); } @@ -974,7 +979,8 @@ static void section_map_types(const char *define_prefix, __u32 ifindex) static void section_helpers(bool *supported_types, const char *define_prefix, __u32 ifindex) { - unsigned int i; + unsigned int prog_type = BPF_PROG_TYPE_UNSPEC; + const char *prog_type_str; print_start_section("helpers", "Scanning eBPF helper functions...", @@ -996,9 +1002,18 @@ section_helpers(bool *supported_types, const char *define_prefix, __u32 ifindex) " %sBPF__PROG_TYPE_ ## prog_type ## __HELPER_ ## helper\n", define_prefix, define_prefix, define_prefix, define_prefix); - for (i = BPF_PROG_TYPE_UNSPEC + 1; i < prog_type_name_size; i++) - probe_helpers_for_progtype(i, supported_types[i], define_prefix, + while (true) { + prog_type++; + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + /* libbpf will return NULL for variants unknown to it. */ + if (!prog_type_str) + break; + + probe_helpers_for_progtype(prog_type, prog_type_str, + supported_types[prog_type], + define_prefix, ifindex); + } print_end_section(); } diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c index 6353a78..e27108 100644 --- a/tools/bpf/bpftool/link.c +++ b/tools/bpf/bpftool/link.c @@ -121,6 +121,7 @@ static int get_prog_info(int prog_id, struct bpf_prog_info *info) static int show_link_close_json(int fd, struct bpf_link_info *info) { struct bpf_prog_info prog_info; + const char *prog_type_str; int err; jsonw_start_object(json_wtr); @@ -137,12 +138,12 @@ static int show_link_close_json(int fd, struct bpf_link_info *info) if (err) return err; - if (prog_info.type < prog_type_name_size) - jsonw_string_field(json_wtr, "prog_type", - prog_type_name[prog_info.type]); + prog_type_str = libbpf_bpf_prog_type_str(prog_info.type); + /* libbpf will return NULL for variants unknown to it. */ + if (prog_type_str) + jsonw_string_field(json_wtr, "prog_type", prog_type_str); else - jsonw_uint_field(json_wtr, "prog_type", - prog_info.type); + jsonw_uint_field(json_wtr, "prog_type", prog_info.type); show_link_attach_type_json(info->tracing.attach_type, json_wtr); @@ -214,6 +215,7 @@ static void show_iter_plain(struct bpf_link_info *info) static int show_link_close_plain(int fd, struct bpf_link_info *info) { struct bpf_prog_info prog_info; + const char *prog_type_str; int err; show_link_header_plain(info); @@ -228,9 +230,10 @@ static int show_link_close_plain(int fd, struct bpf_link_info *info) if (err) return err; - if (prog_info.type < prog_type_name_size) - printf("\n\tprog_type %s ", - prog_type_name[prog_info.type]); + prog_type_str = libbpf_bpf_prog_type_str(prog_info.type); + /* libbpf will return NULL for variants unknown to it. */ + if (prog_type_str) + printf("\n\tprog_type %s ", prog_type_str); else printf("\n\tprog_type %u ", prog_info.type); diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h index aa99ff..74204d 100644 --- a/tools/bpf/bpftool/main.h +++ b/tools/bpf/bpftool/main.h @@ -63,9 +63,6 @@ static inline void *u64_to_ptr(__u64 ptr) #define HELP_SPEC_LINK \ "LINK := { id LINK_ID | pinned FILE }" -extern const char * const prog_type_name[]; -extern const size_t prog_type_name_size; - extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE]; extern const char * const map_type_name[]; diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 877387..70a1fd5 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -513,10 +513,12 @@ static int show_map_close_json(int fd, struct bpf_map_info *info) if (owner_prog_type) { unsigned int prog_type = atoi(owner_prog_type); + const char *prog_type_str; - if (prog_type < prog_type_name_size) + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + if (prog_type_str) jsonw_string_field(json_wtr, "owner_prog_type", - prog_type_name[prog_type]); + prog_type_str); else jsonw_uint_field(json_wtr, "owner_prog_type", prog_type); @@ -597,10 +599,11 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info) printf("\n\t"); if (owner_prog_type) { unsigned int prog_type = atoi(owner_prog_type); + const char *prog_type_str; - if (prog_type < prog_type_name_size) - printf("owner_prog_type %s ", - prog_type_name[prog_type]); + prog_type_str = libbpf_bpf_prog_type_str(prog_type); + if (prog_type_str) + printf("owner_prog_type %s ", prog_type_str); else printf("owner_prog_type %d ", prog_type); } diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index 5c2c63..39e1e71 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -36,43 +36,6 @@ #define BPF_METADATA_PREFIX "bpf_metadata_" #define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1) -const char * const prog_type_name[] = { - [BPF_PROG_TYPE_UNSPEC] = "unspec", - [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter", - [BPF_PROG_TYPE_KPROBE] = "kprobe", - [BPF_PROG_TYPE_SCHED_CLS] = "sched_cls", - [BPF_PROG_TYPE_SCHED_ACT] = "sched_act", - [BPF_PROG_TYPE_TRACEPOINT] = "tracepoint", - [BPF_PROG_TYPE_XDP] = "xdp", - [BPF_PROG_TYPE_PERF_EVENT] = "perf_event", - [BPF_PROG_TYPE_CGROUP_SKB] = "cgroup_skb", - [BPF_PROG_TYPE_CGROUP_SOCK] = "cgroup_sock", - [BPF_PROG_TYPE_LWT_IN] = "lwt_in", - [BPF_PROG_TYPE_LWT_OUT] = "lwt_out", - [BPF_PROG_TYPE_LWT_XMIT] = "lwt_xmit", - [BPF_PROG_TYPE_SOCK_OPS] = "sock_ops", - [BPF_PROG_TYPE_SK_SKB] = "sk_skb", - [BPF_PROG_TYPE_CGROUP_DEVICE] = "cgroup_device", - [BPF_PROG_TYPE_SK_MSG] = "sk_msg", - [BPF_PROG_TYPE_RAW_TRACEPOINT] = "raw_tracepoint", - [BPF_PROG_TYPE_CGROUP_SOCK_ADDR] = "cgroup_sock_addr", - [BPF_PROG_TYPE_LWT_SEG6LOCAL] = "lwt_seg6local", - [BPF_PROG_TYPE_LIRC_MODE2] = "lirc_mode2", - [BPF_PROG_TYPE_SK_REUSEPORT] = "sk_reuseport", - [BPF_PROG_TYPE_FLOW_DISSECTOR] = "flow_dissector", - [BPF_PROG_TYPE_CGROUP_SYSCTL] = "cgroup_sysctl", - [BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE] = "raw_tracepoint_writable", - [BPF_PROG_TYPE_CGROUP_SOCKOPT] = "cgroup_sockopt", - [BPF_PROG_TYPE_TRACING] = "tracing", - [BPF_PROG_TYPE_STRUCT_OPS] = "struct_ops", - [BPF_PROG_TYPE_EXT] = "ext", - [BPF_PROG_TYPE_LSM] = "lsm", - [BPF_PROG_TYPE_SK_LOOKUP] = "sk_lookup", - [BPF_PROG_TYPE_SYSCALL] = "syscall", -}; - -const size_t prog_type_name_size = ARRAY_SIZE(prog_type_name); - enum dump_mode { DUMP_JITED, DUMP_XLATED, @@ -428,12 +391,14 @@ static void show_prog_metadata(int fd, __u32 num_maps) static void print_prog_header_json(struct bpf_prog_info *info, int fd) { + const char *prog_type_str; char prog_name[MAX_PROG_FULL_NAME]; jsonw_uint_field(json_wtr, "id", info->id); - if (info->type < ARRAY_SIZE(prog_type_name)) - jsonw_string_field(json_wtr, "type", - prog_type_name[info->type]); + prog_type_str = libbpf_bpf_prog_type_str(info->type); + + if (prog_type_str) + jsonw_string_field(json_wtr, "type", prog_type_str); else jsonw_uint_field(json_wtr, "type", info->type); @@ -515,11 +480,13 @@ static void print_prog_json(struct bpf_prog_info *info, int fd) static void print_prog_header_plain(struct bpf_prog_info *info, int fd) { + const char *prog_type_str; char prog_name[MAX_PROG_FULL_NAME]; printf("%u: ", info->id); - if (info->type < ARRAY_SIZE(prog_type_name)) - printf("%s ", prog_type_name[info->type]); + prog_type_str = libbpf_bpf_prog_type_str(info->type); + if (prog_type_str) + printf("%s ", prog_type_str); else printf("type %u ", info->type); From patchwork Thu May 19 21:29:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856067 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2962BC433EF for ; Thu, 19 May 2022 21:30:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234566AbiESVaR (ORCPT ); Thu, 19 May 2022 17:30:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234567AbiESVaP (ORCPT ); Thu, 19 May 2022 17:30:15 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF8FCED72A for ; Thu, 19 May 2022 14:30:14 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 81820240027 for ; Thu, 19 May 2022 23:30:13 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995813; bh=5I1xEod7qd/W7xcYhuPajU5c6s6yHVnlJIzwM0f1iLM=; h=From:To:Cc:Subject:Date:From; b=TFm+e/jgBpQw1JAgt106OQ+1vNePFZsrRZj3mJti9VSyX4YN95FUwXybjecCqthl6 mPM2ac5t4Fu9Ovl825vYaqt9trjeYqJT8cqRzszGyZkZqoPJ2eAa3Q9GzEfZyW/UML 9YFf2NSIXrUE6zpCbXKpnCwt4uZWgdUJjuHAJvDH4yEwew2CZbmjD5DBuW1ttt4Y0/ LLIMQjpY7NHjdOXFCC7PfteeYdsJiTte69m8eVJdL0HK9sNRlYoiDCh6PNxZl9HY9x KYv3VxdDwSYiTOjilROmXv2ogzFzrs7+OWMHbZxstj0jDceG4X7aF7gNS0lbO9xPzf 4wSwvAOvYrglA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L43105HRsz6tmW; Thu, 19 May 2022 23:30:12 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 04/12] libbpf: Introduce libbpf_bpf_map_type_str Date: Thu, 19 May 2022 21:29:53 +0000 Message-Id: <20220519213001.729261-5-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change introduces a new function, libbpf_bpf_map_type_str, to the public libbpf API. The function allows users to get a string representation for a bpf_map_type enum variant. Signed-off-by: Daniel Müller --- tools/lib/bpf/libbpf.c | 42 ++++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/libbpf.h | 9 +++++++++ tools/lib/bpf/libbpf.map | 1 + 3 files changed, 52 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 6b9c0f..1cbe90 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -72,6 +72,40 @@ static struct bpf_map *bpf_object__add_map(struct bpf_object *obj); static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog); +static const char * const map_type_name[] = { + [BPF_MAP_TYPE_UNSPEC] = "unspec", + [BPF_MAP_TYPE_HASH] = "hash", + [BPF_MAP_TYPE_ARRAY] = "array", + [BPF_MAP_TYPE_PROG_ARRAY] = "prog_array", + [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf_event_array", + [BPF_MAP_TYPE_PERCPU_HASH] = "percpu_hash", + [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu_array", + [BPF_MAP_TYPE_STACK_TRACE] = "stack_trace", + [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup_array", + [BPF_MAP_TYPE_LRU_HASH] = "lru_hash", + [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru_percpu_hash", + [BPF_MAP_TYPE_LPM_TRIE] = "lpm_trie", + [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array_of_maps", + [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash_of_maps", + [BPF_MAP_TYPE_DEVMAP] = "devmap", + [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash", + [BPF_MAP_TYPE_SOCKMAP] = "sockmap", + [BPF_MAP_TYPE_CPUMAP] = "cpumap", + [BPF_MAP_TYPE_XSKMAP] = "xskmap", + [BPF_MAP_TYPE_SOCKHASH] = "sockhash", + [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage", + [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray", + [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "percpu_cgroup_storage", + [BPF_MAP_TYPE_QUEUE] = "queue", + [BPF_MAP_TYPE_STACK] = "stack", + [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage", + [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops", + [BPF_MAP_TYPE_RINGBUF] = "ringbuf", + [BPF_MAP_TYPE_INODE_STORAGE] = "inode_storage", + [BPF_MAP_TYPE_TASK_STORAGE] = "task_storage", + [BPF_MAP_TYPE_BLOOM_FILTER] = "bloom_filter", +}; + static const char * const prog_type_name[] = { [BPF_PROG_TYPE_UNSPEC] = "unspec", [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter", @@ -9335,6 +9369,14 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type, return libbpf_err(-ESRCH); } +const char *libbpf_bpf_map_type_str(enum bpf_map_type t) +{ + if (t < 0 || t >= ARRAY_SIZE(map_type_name)) + return NULL; + + return map_type_name[t]; +} + const char *libbpf_bpf_prog_type_str(enum bpf_prog_type t) { if (t < 0 || t >= ARRAY_SIZE(prog_type_name)) diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 11b5f8c..6c5b07 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -51,6 +51,15 @@ enum libbpf_errno { LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size); +/** + * @brief **libbpf_bpf_map_type_str()** converts the provided map type value + * into a textual representation. + * @param t The map type. + * @return Pointer to a static string identifying the map type. NULL is + * returned for unknown **bpf_map_type** values. + */ +LIBBPF_API const char *libbpf_bpf_map_type_str(enum bpf_map_type t); + /** * @brief **libbpf_bpf_prog_type_str()** converts the provided program type * value into a textual representation. diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index b12d290..16065ac 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -462,6 +462,7 @@ LIBBPF_0.8.0 { LIBBPF_1.0.0 { global: + libbpf_bpf_map_type_str; libbpf_bpf_prog_type_str; local: *; From patchwork Thu May 19 21:29:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856068 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 322B8C433FE for ; Thu, 19 May 2022 21:30:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234583AbiESVaS (ORCPT ); Thu, 19 May 2022 17:30:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234542AbiESVaR (ORCPT ); Thu, 19 May 2022 17:30:17 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C3B5A76C3 for ; Thu, 19 May 2022 14:30:17 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id B0774240109 for ; Thu, 19 May 2022 23:30:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995815; bh=vjKFQcygCT1Y4SNC69GT0iF0cDzTFXiedGe+w9bVimU=; h=From:To:Cc:Subject:Date:From; b=oG/SF/S/WNfUwloGbNtAJoSN7YOArSWIpKUHk3gES/lruw0eikAUM9ccSEqZpBSbG 8nk1vPxYzSVaZA2xR8ALcRArkC/g8Zs4rq8q9KaZqcB5aZZxmJnCBPIQ5PHoEv3iw/ WaNvnQl8sAtZt1fDRtHSUN0Zc8bb3BCUW6q8wXVbMSV+hPghRIb2GHduN7jZy1unS/ fuVB5fUkkSY9nj4rBIU02G2Vj9awlQQMBuQ3cKERVjRAMflk4Jah9fgNMCq5EByZdN VVSsxYIr2ovEWCOA5k1BOvkLBqGJnXpDS1zFvEv2rr5SkjNbQMP9l6pJ8HUStBpjZf +CrrelLcsDzmA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L4312612Kz6tq0; Thu, 19 May 2022 23:30:14 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 05/12] selftests/bpf: Add test for libbpf_bpf_map_type_str Date: Thu, 19 May 2022 21:29:54 +0000 Message-Id: <20220519213001.729261-6-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change adds a test for libbpf_bpf_map_type_str. The test retrieves all variants of the bpf_map_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller --- .../selftests/bpf/prog_tests/libbpf_str.c | 56 ++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c index 3e7a14..0f15aaa 100644 --- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -14,11 +14,53 @@ static void uppercase(char *s) *s = toupper(*s); } +/** + * Test case to check that all bpf_map_type variants are covered by + * libbpf_bpf_map_type_str. + */ +static void test_libbpf_bpf_map_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_map_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_map_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_map_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_map_type map_type = (enum bpf_map_type)e->val; + const char *map_type_name; + const char *map_type_str; + char buf[256]; + + map_type_name = btf__str_by_offset(btf, e->name_off); + map_type_str = libbpf_bpf_map_type_str(map_type); + ASSERT_OK_PTR(map_type_str, map_type_name); + + snprintf(buf, sizeof(buf), "BPF_MAP_TYPE_%s", map_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, map_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} + /** * Test case to check that all bpf_prog_type variants are covered by * libbpf_bpf_prog_type_str. */ -void test_libbpf_bpf_prog_type_str(void) +static void test_libbpf_bpf_prog_type_str(void) { struct btf *btf; const struct btf_type *t; @@ -55,3 +97,15 @@ void test_libbpf_bpf_prog_type_str(void) cleanup: btf__free(btf); } + +/** + * Run all libbpf str conversion tests. + */ +void test_libbpf_str(void) +{ + if (test__start_subtest("bpf_map_type_str")) + test_libbpf_bpf_map_type_str(); + + if (test__start_subtest("bpf_prog_type_str")) + test_libbpf_bpf_prog_type_str(); +} From patchwork Thu May 19 21:29:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856069 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1073C433F5 for ; Thu, 19 May 2022 21:30:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234542AbiESVaV (ORCPT ); Thu, 19 May 2022 17:30:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234609AbiESVaU (ORCPT ); Thu, 19 May 2022 17:30:20 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 381296E8CD for ; Thu, 19 May 2022 14:30:19 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id DE337240027 for ; Thu, 19 May 2022 23:30:17 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995817; bh=8NEBBAguPojueutGnTIqE8uuJzn2oWCZZ8By7/Dlync=; h=From:To:Cc:Subject:Date:From; b=KR7V/lO7YIioe9Izb5EBAbAVHDcTtMBfGPkWYPf2V6LD4SWzhBfXeFWHo41/y9/c6 jJ1G2QGPsj4MP4lG6tdZQvMpzFsRApdekTzGbk0/fFX+GbsyvUUYTxu1/eWAArqiP3 yV1p3+bnBUYL1S1qLl//3c+iNL7m6znajUOABhucmRCz+qTgG5g7R2UtWGyj59ZnYf aA4F3VOZ87KAytYraGh2UF0TYM0db0MPKHgu6HicrEQaWhVrjW4K1weirjHSX18sMu TiEj2x0D4kubo5GK0LeRf5rPCg456PyaEhoLYfbg5PS9teimOjl8TWWbkyyrJ2jv1v aIR5NoxMqup/w== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L43150Dd4z6trH; Thu, 19 May 2022 23:30:17 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 06/12] bpftool: Use libbpf_bpf_map_type_str Date: Thu, 19 May 2022 21:29:55 +0000 Message-Id: <20220519213001.729261-7-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change switches bpftool over to using the recently introduced libbpf_bpf_map_type_str function instead of maintaining its own string representation for the bpf_map_type enum. Signed-off-by: Daniel Müller --- tools/bpf/bpftool/feature.c | 30 +++++++++------- tools/bpf/bpftool/main.h | 3 -- tools/bpf/bpftool/map.c | 69 ++++++++++++++----------------------- 3 files changed, 42 insertions(+), 60 deletions(-) diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c index 02753f..cc9e4d 100644 --- a/tools/bpf/bpftool/feature.c +++ b/tools/bpf/bpftool/feature.c @@ -615,8 +615,8 @@ static bool probe_map_type_ifindex(enum bpf_map_type map_type, __u32 ifindex) } static void -probe_map_type(enum bpf_map_type map_type, const char *define_prefix, - __u32 ifindex) +probe_map_type(enum bpf_map_type map_type, char const *map_type_str, + const char *define_prefix, __u32 ifindex) { char feat_name[128], plain_desc[128], define_name[128]; const char *plain_comment = "eBPF map_type "; @@ -641,20 +641,16 @@ probe_map_type(enum bpf_map_type map_type, const char *define_prefix, * check required for unprivileged users */ - if (!map_type_name[map_type]) { - p_info("map type name not found (type %d)", map_type); - return; - } maxlen = sizeof(plain_desc) - strlen(plain_comment) - 1; - if (strlen(map_type_name[map_type]) > maxlen) { + if (strlen(map_type_str) > maxlen) { p_info("map type name too long"); return; } - sprintf(feat_name, "have_%s_map_type", map_type_name[map_type]); - sprintf(define_name, "%s_map_type", map_type_name[map_type]); + sprintf(feat_name, "have_%s_map_type", map_type_str); + sprintf(define_name, "%s_map_type", map_type_str); uppercase(define_name, sizeof(define_name)); - sprintf(plain_desc, "%s%s", plain_comment, map_type_name[map_type]); + sprintf(plain_desc, "%s%s", plain_comment, map_type_str); print_bool_feature(feat_name, plain_desc, define_name, res, define_prefix); } @@ -963,15 +959,23 @@ section_program_types(bool *supported_types, const char *define_prefix, static void section_map_types(const char *define_prefix, __u32 ifindex) { - unsigned int i; + unsigned int map_type = BPF_MAP_TYPE_UNSPEC; + const char *map_type_str; print_start_section("map_types", "Scanning eBPF map types...", "/*** eBPF map types ***/", define_prefix); - for (i = BPF_MAP_TYPE_UNSPEC + 1; i < map_type_name_size; i++) - probe_map_type(i, define_prefix, ifindex); + while (true) { + map_type++; + map_type_str = libbpf_bpf_map_type_str(map_type); + /* libbpf will return NULL for variants unknown to it. */ + if (!map_type_str) + break; + + probe_map_type(map_type, map_type_str, define_prefix, ifindex); + } print_end_section(); } diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h index 74204d..e4fdaa0 100644 --- a/tools/bpf/bpftool/main.h +++ b/tools/bpf/bpftool/main.h @@ -65,9 +65,6 @@ static inline void *u64_to_ptr(__u64 ptr) extern const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE]; -extern const char * const map_type_name[]; -extern const size_t map_type_name_size; - /* keep in sync with the definition in skeleton/pid_iter.bpf.c */ enum bpf_obj_type { BPF_OBJ_UNKNOWN, diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index 70a1fd5..800834b 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -22,42 +22,6 @@ #include "json_writer.h" #include "main.h" -const char * const map_type_name[] = { - [BPF_MAP_TYPE_UNSPEC] = "unspec", - [BPF_MAP_TYPE_HASH] = "hash", - [BPF_MAP_TYPE_ARRAY] = "array", - [BPF_MAP_TYPE_PROG_ARRAY] = "prog_array", - [BPF_MAP_TYPE_PERF_EVENT_ARRAY] = "perf_event_array", - [BPF_MAP_TYPE_PERCPU_HASH] = "percpu_hash", - [BPF_MAP_TYPE_PERCPU_ARRAY] = "percpu_array", - [BPF_MAP_TYPE_STACK_TRACE] = "stack_trace", - [BPF_MAP_TYPE_CGROUP_ARRAY] = "cgroup_array", - [BPF_MAP_TYPE_LRU_HASH] = "lru_hash", - [BPF_MAP_TYPE_LRU_PERCPU_HASH] = "lru_percpu_hash", - [BPF_MAP_TYPE_LPM_TRIE] = "lpm_trie", - [BPF_MAP_TYPE_ARRAY_OF_MAPS] = "array_of_maps", - [BPF_MAP_TYPE_HASH_OF_MAPS] = "hash_of_maps", - [BPF_MAP_TYPE_DEVMAP] = "devmap", - [BPF_MAP_TYPE_DEVMAP_HASH] = "devmap_hash", - [BPF_MAP_TYPE_SOCKMAP] = "sockmap", - [BPF_MAP_TYPE_CPUMAP] = "cpumap", - [BPF_MAP_TYPE_XSKMAP] = "xskmap", - [BPF_MAP_TYPE_SOCKHASH] = "sockhash", - [BPF_MAP_TYPE_CGROUP_STORAGE] = "cgroup_storage", - [BPF_MAP_TYPE_REUSEPORT_SOCKARRAY] = "reuseport_sockarray", - [BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE] = "percpu_cgroup_storage", - [BPF_MAP_TYPE_QUEUE] = "queue", - [BPF_MAP_TYPE_STACK] = "stack", - [BPF_MAP_TYPE_SK_STORAGE] = "sk_storage", - [BPF_MAP_TYPE_STRUCT_OPS] = "struct_ops", - [BPF_MAP_TYPE_RINGBUF] = "ringbuf", - [BPF_MAP_TYPE_INODE_STORAGE] = "inode_storage", - [BPF_MAP_TYPE_TASK_STORAGE] = "task_storage", - [BPF_MAP_TYPE_BLOOM_FILTER] = "bloom_filter", -}; - -const size_t map_type_name_size = ARRAY_SIZE(map_type_name); - static struct hashmap *map_table; static bool map_is_per_cpu(__u32 type) @@ -81,12 +45,18 @@ static bool map_is_map_of_progs(__u32 type) static int map_type_from_str(const char *type) { + const char *map_type_str; unsigned int i; - for (i = 0; i < ARRAY_SIZE(map_type_name); i++) + for (i = 0; ; i++) { + map_type_str = libbpf_bpf_map_type_str(i); + if (!map_type_str) + break; + /* Don't allow prefixing in case of possible future shadowing */ - if (map_type_name[i] && !strcmp(map_type_name[i], type)) + if (!strcmp(map_type_str, type)) return i; + } return -1; } @@ -472,9 +442,12 @@ static int parse_elem(char **argv, struct bpf_map_info *info, static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr) { + const char *map_type_str; + jsonw_uint_field(wtr, "id", info->id); - if (info->type < ARRAY_SIZE(map_type_name)) - jsonw_string_field(wtr, "type", map_type_name[info->type]); + map_type_str = libbpf_bpf_map_type_str(info->type); + if (map_type_str) + jsonw_string_field(wtr, "type", map_type_str); else jsonw_uint_field(wtr, "type", info->type); @@ -561,9 +534,13 @@ static int show_map_close_json(int fd, struct bpf_map_info *info) static void show_map_header_plain(struct bpf_map_info *info) { + const char *map_type_str; + printf("%u: ", info->id); - if (info->type < ARRAY_SIZE(map_type_name)) - printf("%s ", map_type_name[info->type]); + + map_type_str = libbpf_bpf_map_type_str(info->type); + if (map_type_str) + printf("%s ", map_type_str); else printf("type %u ", info->type); @@ -879,9 +856,13 @@ map_dump(int fd, struct bpf_map_info *info, json_writer_t *wtr, } if (info->type == BPF_MAP_TYPE_REUSEPORT_SOCKARRAY && - info->value_size != 8) + info->value_size != 8) { + const char *map_type_str; + + map_type_str = libbpf_bpf_map_type_str(info->type); p_info("Warning: cannot read values from %s map with value_size != 8", - map_type_name[info->type]); + map_type_str); + } while (true) { err = bpf_map_get_next_key(fd, prev_key, key); if (err) { From patchwork Thu May 19 21:29:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856070 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7163BC433FE for ; Thu, 19 May 2022 21:30:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234609AbiESVaX (ORCPT ); Thu, 19 May 2022 17:30:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234567AbiESVaW (ORCPT ); Thu, 19 May 2022 17:30:22 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40A836E8CD for ; Thu, 19 May 2022 14:30:21 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id E4DE1240026 for ; Thu, 19 May 2022 23:30:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995819; bh=u9Jd+TbDO+WD+UVzQwWIk+r5wq4Y9nsIqef3KzU10UE=; h=From:To:Cc:Subject:Date:From; b=mbact/0zVeBMTb1+auaYNGAz37mZLt/qpGzRpHbKOm3Z9vBbf5zDfyHxPQXflOahM kfqbeoBnkuYMsdWMNEc2Q/bGwINFrcpg+3/wQpfLchtbluukVObys8udJXmHTNrGH2 J5o9lqIAFbfBRoot9o7iLyjRMA0qFilxBGZkvYPyncXXUSH3H6++IYqzBWq32qcuEE +LzOZj1mpHF2zSpKCXVgTIJV3lSZnyoR/53b9lyfzbKqX0HuldanS62y6IG6Y8Wfmn 3yUjPdKLkrd445k8zj7tZuQXwsCLz+tGTeBuv/HyTurXYvUXwrm8JpgbXHbkA5pSzM 68x2nEYiFfkLg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L431718C2z6tpy; Thu, 19 May 2022 23:30:19 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 07/12] libbpf: Introduce libbpf_bpf_attach_type_str Date: Thu, 19 May 2022 21:29:56 +0000 Message-Id: <20220519213001.729261-8-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change introduces a new function, libbpf_bpf_attach_type_str, to the public libbpf API. The function allows users to get a string representation for a bpf_attach_type variant. Signed-off-by: Daniel Müller --- tools/lib/bpf/libbpf.c | 54 ++++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/libbpf.h | 9 +++++++ tools/lib/bpf/libbpf.map | 1 + 3 files changed, 64 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 1cbe90..bc56e9c 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -72,6 +72,52 @@ static struct bpf_map *bpf_object__add_map(struct bpf_object *obj); static bool prog_is_subprog(const struct bpf_object *obj, const struct bpf_program *prog); +static const char * const attach_type_name[] = { + [BPF_CGROUP_INET_INGRESS] = "cgroup_inet_ingress", + [BPF_CGROUP_INET_EGRESS] = "cgroup_inet_egress", + [BPF_CGROUP_INET_SOCK_CREATE] = "cgroup_inet_sock_create", + [BPF_CGROUP_INET_SOCK_RELEASE] = "cgroup_inet_sock_release", + [BPF_CGROUP_SOCK_OPS] = "cgroup_sock_ops", + [BPF_CGROUP_DEVICE] = "cgroup_device", + [BPF_CGROUP_INET4_BIND] = "cgroup_inet4_bind", + [BPF_CGROUP_INET6_BIND] = "cgroup_inet6_bind", + [BPF_CGROUP_INET4_CONNECT] = "cgroup_inet4_connect", + [BPF_CGROUP_INET6_CONNECT] = "cgroup_inet6_connect", + [BPF_CGROUP_INET4_POST_BIND] = "cgroup_inet4_post_bind", + [BPF_CGROUP_INET6_POST_BIND] = "cgroup_inet6_post_bind", + [BPF_CGROUP_INET4_GETPEERNAME] = "cgroup_inet4_getpeername", + [BPF_CGROUP_INET6_GETPEERNAME] = "cgroup_inet6_getpeername", + [BPF_CGROUP_INET4_GETSOCKNAME] = "cgroup_inet4_getsockname", + [BPF_CGROUP_INET6_GETSOCKNAME] = "cgroup_inet6_getsockname", + [BPF_CGROUP_UDP4_SENDMSG] = "cgroup_udp4_sendmsg", + [BPF_CGROUP_UDP6_SENDMSG] = "cgroup_udp6_sendmsg", + [BPF_CGROUP_SYSCTL] = "cgroup_sysctl", + [BPF_CGROUP_UDP4_RECVMSG] = "cgroup_udp4_recvmsg", + [BPF_CGROUP_UDP6_RECVMSG] = "cgroup_udp6_recvmsg", + [BPF_CGROUP_GETSOCKOPT] = "cgroup_getsockopt", + [BPF_CGROUP_SETSOCKOPT] = "cgroup_setsockopt", + [BPF_SK_SKB_STREAM_PARSER] = "sk_skb_stream_parser", + [BPF_SK_SKB_STREAM_VERDICT] = "sk_skb_stream_verdict", + [BPF_SK_SKB_VERDICT] = "sk_skb_verdict", + [BPF_SK_MSG_VERDICT] = "sk_msg_verdict", + [BPF_LIRC_MODE2] = "lirc_mode2", + [BPF_FLOW_DISSECTOR] = "flow_dissector", + [BPF_TRACE_RAW_TP] = "trace_raw_tp", + [BPF_TRACE_FENTRY] = "trace_fentry", + [BPF_TRACE_FEXIT] = "trace_fexit", + [BPF_MODIFY_RETURN] = "modify_return", + [BPF_LSM_MAC] = "lsm_mac", + [BPF_SK_LOOKUP] = "sk_lookup", + [BPF_TRACE_ITER] = "trace_iter", + [BPF_XDP_DEVMAP] = "xdp_devmap", + [BPF_XDP_CPUMAP] = "xdp_cpumap", + [BPF_XDP] = "xdp", + [BPF_SK_REUSEPORT_SELECT] = "sk_reuseport_select", + [BPF_SK_REUSEPORT_SELECT_OR_MIGRATE] = "sk_reuseport_select_or_migrate", + [BPF_PERF_EVENT] = "perf_event", + [BPF_TRACE_KPROBE_MULTI] = "trace_kprobe_multi", +}; + static const char * const map_type_name[] = { [BPF_MAP_TYPE_UNSPEC] = "unspec", [BPF_MAP_TYPE_HASH] = "hash", @@ -9369,6 +9415,14 @@ int libbpf_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type, return libbpf_err(-ESRCH); } +const char *libbpf_bpf_attach_type_str(enum bpf_attach_type t) +{ + if (t < 0 || t >= ARRAY_SIZE(attach_type_name)) + return NULL; + + return attach_type_name[t]; +} + const char *libbpf_bpf_map_type_str(enum bpf_map_type t) { if (t < 0 || t >= ARRAY_SIZE(map_type_name)) diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 6c5b07..37a234 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -51,6 +51,15 @@ enum libbpf_errno { LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size); +/** + * @brief **libbpf_bpf_attach_type_str()** converts the provided attach type + * value into a textual representation. + * @param t The attach type. + * @return Pointer to a static string identifying the attach type. NULL is + * returned for unknown **bpf_attach_type** values. + */ +LIBBPF_API const char *libbpf_bpf_attach_type_str(enum bpf_attach_type t); + /** * @brief **libbpf_bpf_map_type_str()** converts the provided map type value * into a textual representation. diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 16065ac..44c536 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -462,6 +462,7 @@ LIBBPF_0.8.0 { LIBBPF_1.0.0 { global: + libbpf_bpf_attach_type_str; libbpf_bpf_map_type_str; libbpf_bpf_prog_type_str; From patchwork Thu May 19 21:29:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856071 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40B08C433F5 for ; Thu, 19 May 2022 21:30:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234650AbiESVaZ (ORCPT ); Thu, 19 May 2022 17:30:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234614AbiESVaY (ORCPT ); Thu, 19 May 2022 17:30:24 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 653D7A76C3 for ; Thu, 19 May 2022 14:30:23 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 0B90E240029 for ; Thu, 19 May 2022 23:30:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995822; bh=b2UnSLOe6YnEphWwYCjWf7KXoRgx+UJLMgJ+5vNx88M=; h=From:To:Cc:Subject:Date:From; b=mpwEFnjw5bNe97BxMs1jaJdMjYaHTRcK+qSgqCMlvTASHqrxAaaFuS2ux13Mjq4be NYHkoQA5hOwXVPNum4bKiXtxt1bXzZ4yAMG+oBdtcwaz50GQIPyQ8rXtHJtX7lSTul qHbwmErCg17X7nL4EK0C97YkYvnsWrYT0j+bvmPHSMjFgqKGL47GyUBbsyilNFsR+k L7Z4x7YX8dUMPsnPdgD0Q7JRGG+cLikIT2S1eQob9AbFcHhhbyg6zb9NyKqXwoYIOn Cal8bszfJ8Kaiye3GnYKv+B5Q7l3w71G4IwcigsGJ+lylEp9JL+5gJ8JULvgcM2SES s0B3YNE5hkNOQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L43191czhz6tmW; Thu, 19 May 2022 23:30:21 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 08/12] selftests/bpf: Add test for libbpf_bpf_attach_type_str Date: Thu, 19 May 2022 21:29:57 +0000 Message-Id: <20220519213001.729261-9-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change adds a test for libbpf_bpf_attach_type_str. The test retrieves all variants of the bpf_attach_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller --- .../selftests/bpf/prog_tests/libbpf_str.c | 48 +++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c index 0f15aaa..f5fa09 100644 --- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -14,6 +14,51 @@ static void uppercase(char *s) *s = toupper(*s); } +/** + * Test case to check that all bpf_attach_type variants are covered by + * libbpf_bpf_attach_type_str. + */ +static void test_libbpf_bpf_attach_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_attach_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_attach_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_attach_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_attach_type attach_type = (enum bpf_attach_type)e->val; + const char *attach_type_name; + const char *attach_type_str; + char buf[256]; + + if (attach_type == __MAX_BPF_ATTACH_TYPE) + continue; + + attach_type_name = btf__str_by_offset(btf, e->name_off); + attach_type_str = libbpf_bpf_attach_type_str(attach_type); + ASSERT_OK_PTR(attach_type_str, attach_type_name); + + snprintf(buf, sizeof(buf), "BPF_%s", attach_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, attach_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} + /** * Test case to check that all bpf_map_type variants are covered by * libbpf_bpf_map_type_str. @@ -103,6 +148,9 @@ static void test_libbpf_bpf_prog_type_str(void) */ void test_libbpf_str(void) { + if (test__start_subtest("bpf_attach_type_str")) + test_libbpf_bpf_attach_type_str(); + if (test__start_subtest("bpf_map_type_str")) test_libbpf_bpf_map_type_str(); From patchwork Thu May 19 21:29:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856073 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9623BC433F5 for ; Thu, 19 May 2022 21:30:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234635AbiESVa3 (ORCPT ); Thu, 19 May 2022 17:30:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234672AbiESVa2 (ORCPT ); Thu, 19 May 2022 17:30:28 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B900D6E8CD for ; Thu, 19 May 2022 14:30:25 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 6737C24010B for ; Thu, 19 May 2022 23:30:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995824; bh=LvCZzSjuZvjP+qlNOQ9GPvFU0xkt/UuB4neMOWvWU6s=; h=From:To:Cc:Subject:Date:From; b=m2CqQIzg27C+f1q2GgBXvyL///ThX/6j8BmPVtsyr6XX5A88apbTDO3FpOwHDpnw6 8XXGv509qHQdM4zjbn4TIUiENkQD2euZkWaPnF6mobxjxLa0XlwJqxrv07nTFfrQ7o V6KRn/HRjomOM3tRpKDcKLKhkFwQ2Zpq5CUKVdWTURwIPkIokMVb7L7tnYPisHsNYq uVrOeTikhsjbttQQcUZZX1zM6j1VJ4FeYC+VdDc2NizZZGxexZzi88UR/0I9j5Kfhy I16FKBM3yyVqRPwo+B4ewLTAsCG+MvaNTM89CO/V32TFyAb8ULOIW2MLGwh9w76qSQ UffIl7mgxP7VA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L431C2Pfsz6tpj; Thu, 19 May 2022 23:30:23 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 09/12] bpftool: Use libbpf_bpf_attach_type_str Date: Thu, 19 May 2022 21:29:58 +0000 Message-Id: <20220519213001.729261-10-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change switches bpftool over to using the recently introduced libbpf_bpf_attach_type_str function instead of maintaining its own string representation for the bpf_attach_type enum. Note that contrary to other enum types, the variant names that bpftool maps bpf_attach_type to do not follow a simple to follow rule. With bpf_prog_type, for example, the textual representation can easily be inferred by stripping the BPF_PROG_TYPE_ prefix and lowercasing the remaining string. bpf_attach_type violates this rule for various variants. We decided to fix up this deficiency with this change, meaning that bpftool uses the same textual representations as libbpf. Supporting test, completion scripts, and man pages have been adjusted accordingly. However, we did add support for accepting (the now undocumented) original attach type names when they are provided by users. For the test (test_bpftool_synctypes.py), I have removed the enum representation checks, because we no longer mirror the various enum variant names in bpftool source code. For the man page, help text, and completion script checks we are now using enum definitions from uapi/linux/bpf.h as the source of truth directly. Signed-off-by: Daniel Müller --- .../bpftool/Documentation/bpftool-cgroup.rst | 16 +- .../bpftool/Documentation/bpftool-prog.rst | 5 +- tools/bpf/bpftool/bash-completion/bpftool | 18 +- tools/bpf/bpftool/cgroup.c | 49 ++++-- tools/bpf/bpftool/common.c | 82 ++++----- tools/bpf/bpftool/link.c | 15 +- tools/bpf/bpftool/main.h | 17 ++ tools/bpf/bpftool/prog.c | 26 ++- .../selftests/bpf/test_bpftool_synctypes.py | 163 ++++++++---------- 9 files changed, 213 insertions(+), 178 deletions(-) diff --git a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst index a17e9a..bd015e 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst @@ -31,11 +31,17 @@ CGROUP COMMANDS | **bpftool** **cgroup help** | | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } -| *ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** | -| **bind4** | **bind6** | **post_bind4** | **post_bind6** | **connect4** | **connect6** | -| **getpeername4** | **getpeername6** | **getsockname4** | **getsockname6** | **sendmsg4** | -| **sendmsg6** | **recvmsg4** | **recvmsg6** | **sysctl** | **getsockopt** | **setsockopt** | -| **sock_release** } +| *ATTACH_TYPE* := { **cgroup_inet_ingress** | **cgroup_inet_egress** | +| **cgroup_inet_sock_create** | **cgroup_sock_ops** | +| **cgroup_device** | **cgroup_inet4_bind** | **cgroup_inet6_bind** | +| **cgroup_inet4_post_bind** | **cgroup_inet6_post_bind** | +| **cgroup_inet4_connect** | **cgroup_inet6_connect** | +| **cgroup_inet4_getpeername** | **cgroup_inet6_getpeername** | +| **cgroup_inet4_getsockname** | **cgroup_inet6_getsockname** | +| **cgroup_udp4_sendmsg** | **cgroup_udp6_sendmsg** | +| **cgroup_udp4_recvmsg** | **cgroup_udp6_recvmsg** | +| **cgroup_sysctl** | **cgroup_getsockopt** | **cgroup_setsockopt** | +| **cgroup_inet_sock_release** } | *ATTACH_FLAGS* := { **multi** | **override** } DESCRIPTION diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst index a2e935..eb1b2a 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst @@ -53,8 +53,9 @@ PROG COMMANDS | **cgroup/getsockopt** | **cgroup/setsockopt** | **cgroup/sock_release** | | **struct_ops** | **fentry** | **fexit** | **freplace** | **sk_lookup** | } -| *ATTACH_TYPE* := { -| **msg_verdict** | **skb_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector** +| *ATTACH_TYPE* := { +| **sk_msg_verdict** | **sk_skb_verdict** | **sk_skb_stream_verdict** | +| **sk_skb_stream_parser** | **flow_dissector** | } | *METRICs* := { | **cycles** | **instructions** | **l1d_loads** | **llc_misses** | diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool index 5df8d7..91f89a 100644 --- a/tools/bpf/bpftool/bash-completion/bpftool +++ b/tools/bpf/bpftool/bash-completion/bpftool @@ -407,8 +407,8 @@ _bpftool() return 0 ;; 5) - local BPFTOOL_PROG_ATTACH_TYPES='msg_verdict \ - skb_verdict stream_verdict stream_parser \ + local BPFTOOL_PROG_ATTACH_TYPES='sk_msg_verdict \ + sk_skb_verdict sk_skb_stream_verdict sk_skb_stream_parser \ flow_dissector' COMPREPLY=( $( compgen -W "$BPFTOOL_PROG_ATTACH_TYPES" -- "$cur" ) ) return 0 @@ -1039,12 +1039,14 @@ _bpftool() return 0 ;; attach|detach) - local BPFTOOL_CGROUP_ATTACH_TYPES='ingress egress \ - sock_create sock_ops device \ - bind4 bind6 post_bind4 post_bind6 connect4 connect6 \ - getpeername4 getpeername6 getsockname4 getsockname6 \ - sendmsg4 sendmsg6 recvmsg4 recvmsg6 sysctl getsockopt \ - setsockopt sock_release' + local BPFTOOL_CGROUP_ATTACH_TYPES='cgroup_inet_ingress cgroup_inet_egress \ + cgroup_inet_sock_create cgroup_sock_ops cgroup_device cgroup_inet4_bind \ + cgroup_inet6_bind cgroup_inet4_post_bind cgroup_inet6_post_bind \ + cgroup_inet4_connect cgroup_inet6_connect cgroup_inet4_getpeername \ + cgroup_inet6_getpeername cgroup_inet4_getsockname cgroup_inet6_getsockname \ + cgroup_udp4_sendmsg cgroup_udp6_sendmsg cgroup_udp4_recvmsg \ + cgroup_udp6_recvmsg cgroup_sysctl cgroup_getsockopt cgroup_setsockopt \ + cgroup_inet_sock_release' local ATTACH_FLAGS='multi override' local PROG_TYPE='id pinned tag name' # Check for $prev = $command first diff --git a/tools/bpf/bpftool/cgroup.c b/tools/bpf/bpftool/cgroup.c index effe136..c111a5 100644 --- a/tools/bpf/bpftool/cgroup.c +++ b/tools/bpf/bpftool/cgroup.c @@ -21,25 +21,39 @@ #define HELP_SPEC_ATTACH_FLAGS \ "ATTACH_FLAGS := { multi | override }" -#define HELP_SPEC_ATTACH_TYPES \ - " ATTACH_TYPE := { ingress | egress | sock_create |\n" \ - " sock_ops | device | bind4 | bind6 |\n" \ - " post_bind4 | post_bind6 | connect4 |\n" \ - " connect6 | getpeername4 | getpeername6 |\n" \ - " getsockname4 | getsockname6 | sendmsg4 |\n" \ - " sendmsg6 | recvmsg4 | recvmsg6 |\n" \ - " sysctl | getsockopt | setsockopt |\n" \ - " sock_release }" +#define HELP_SPEC_ATTACH_TYPES \ + " ATTACH_TYPE := { cgroup_inet_ingress | cgroup_inet_egress |\n" \ + " cgroup_inet_sock_create | cgroup_sock_ops |\n" \ + " cgroup_device | cgroup_inet4_bind |\n" \ + " cgroup_inet6_bind | cgroup_inet4_post_bind |\n" \ + " cgroup_inet6_post_bind | cgroup_inet4_connect |\n" \ + " cgroup_inet6_connect | cgroup_inet4_getpeername |\n" \ + " cgroup_inet6_getpeername | cgroup_inet4_getsockname |\n" \ + " cgroup_inet6_getsockname | cgroup_udp4_sendmsg |\n" \ + " cgroup_udp6_sendmsg | cgroup_udp4_recvmsg |\n" \ + " cgroup_udp6_recvmsg | cgroup_sysctl |\n" \ + " cgroup_getsockopt | cgroup_setsockopt |\n" \ + " cgroup_inet_sock_release }" static unsigned int query_flags; static enum bpf_attach_type parse_attach_type(const char *str) { + const char *attach_type_str; enum bpf_attach_type type; - for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) { - if (attach_type_name[type] && - is_prefix(str, attach_type_name[type])) + for (type = 0; ; type++) { + attach_type_str = libbpf_bpf_attach_type_str(type); + if (!attach_type_str) + break; + if (is_prefix(str, attach_type_str)) + return type; + + /* Also check traditionally used attach type strings. */ + attach_type_str = bpf_attach_type_input_str(type); + if (!attach_type_str) + continue; + if (is_prefix(str, attach_type_str)) return type; } @@ -52,6 +66,7 @@ static int show_bpf_prog(int id, enum bpf_attach_type attach_type, { char prog_name[MAX_PROG_FULL_NAME]; struct bpf_prog_info info = {}; + const char *attach_type_str; __u32 info_len = sizeof(info); int prog_fd; @@ -64,13 +79,13 @@ static int show_bpf_prog(int id, enum bpf_attach_type attach_type, return -1; } + attach_type_str = libbpf_bpf_attach_type_str(attach_type); get_prog_full_name(&info, prog_fd, prog_name, sizeof(prog_name)); if (json_output) { jsonw_start_object(json_wtr); jsonw_uint_field(json_wtr, "id", info.id); - if (attach_type < ARRAY_SIZE(attach_type_name)) - jsonw_string_field(json_wtr, "attach_type", - attach_type_name[attach_type]); + if (attach_type_str) + jsonw_string_field(json_wtr, "attach_type", attach_type_str); else jsonw_uint_field(json_wtr, "attach_type", attach_type); jsonw_string_field(json_wtr, "attach_flags", @@ -79,8 +94,8 @@ static int show_bpf_prog(int id, enum bpf_attach_type attach_type, jsonw_end_object(json_wtr); } else { printf("%s%-8u ", level ? " " : "", info.id); - if (attach_type < ARRAY_SIZE(attach_type_name)) - printf("%-15s", attach_type_name[attach_type]); + if (attach_type_str) + printf("%-15s", attach_type_str); else printf("type %-10u", attach_type); printf(" %-15s %-15s\n", attach_flags_str, prog_name); diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c index c74014..b659eac 100644 --- a/tools/bpf/bpftool/common.c +++ b/tools/bpf/bpftool/common.c @@ -31,52 +31,6 @@ #define BPF_FS_MAGIC 0xcafe4a11 #endif -const char * const attach_type_name[__MAX_BPF_ATTACH_TYPE] = { - [BPF_CGROUP_INET_INGRESS] = "ingress", - [BPF_CGROUP_INET_EGRESS] = "egress", - [BPF_CGROUP_INET_SOCK_CREATE] = "sock_create", - [BPF_CGROUP_INET_SOCK_RELEASE] = "sock_release", - [BPF_CGROUP_SOCK_OPS] = "sock_ops", - [BPF_CGROUP_DEVICE] = "device", - [BPF_CGROUP_INET4_BIND] = "bind4", - [BPF_CGROUP_INET6_BIND] = "bind6", - [BPF_CGROUP_INET4_CONNECT] = "connect4", - [BPF_CGROUP_INET6_CONNECT] = "connect6", - [BPF_CGROUP_INET4_POST_BIND] = "post_bind4", - [BPF_CGROUP_INET6_POST_BIND] = "post_bind6", - [BPF_CGROUP_INET4_GETPEERNAME] = "getpeername4", - [BPF_CGROUP_INET6_GETPEERNAME] = "getpeername6", - [BPF_CGROUP_INET4_GETSOCKNAME] = "getsockname4", - [BPF_CGROUP_INET6_GETSOCKNAME] = "getsockname6", - [BPF_CGROUP_UDP4_SENDMSG] = "sendmsg4", - [BPF_CGROUP_UDP6_SENDMSG] = "sendmsg6", - [BPF_CGROUP_SYSCTL] = "sysctl", - [BPF_CGROUP_UDP4_RECVMSG] = "recvmsg4", - [BPF_CGROUP_UDP6_RECVMSG] = "recvmsg6", - [BPF_CGROUP_GETSOCKOPT] = "getsockopt", - [BPF_CGROUP_SETSOCKOPT] = "setsockopt", - [BPF_SK_SKB_STREAM_PARSER] = "sk_skb_stream_parser", - [BPF_SK_SKB_STREAM_VERDICT] = "sk_skb_stream_verdict", - [BPF_SK_SKB_VERDICT] = "sk_skb_verdict", - [BPF_SK_MSG_VERDICT] = "sk_msg_verdict", - [BPF_LIRC_MODE2] = "lirc_mode2", - [BPF_FLOW_DISSECTOR] = "flow_dissector", - [BPF_TRACE_RAW_TP] = "raw_tp", - [BPF_TRACE_FENTRY] = "fentry", - [BPF_TRACE_FEXIT] = "fexit", - [BPF_MODIFY_RETURN] = "mod_ret", - [BPF_LSM_MAC] = "lsm_mac", - [BPF_SK_LOOKUP] = "sk_lookup", - [BPF_TRACE_ITER] = "trace_iter", - [BPF_XDP_DEVMAP] = "xdp_devmap", - [BPF_XDP_CPUMAP] = "xdp_cpumap", - [BPF_XDP] = "xdp", - [BPF_SK_REUSEPORT_SELECT] = "sk_skb_reuseport_select", - [BPF_SK_REUSEPORT_SELECT_OR_MIGRATE] = "sk_skb_reuseport_select_or_migrate", - [BPF_PERF_EVENT] = "perf_event", - [BPF_TRACE_KPROBE_MULTI] = "trace_kprobe_multi", -}; - void p_err(const char *fmt, ...) { va_list ap; @@ -1009,3 +963,39 @@ bool equal_fn_for_key_as_id(const void *k1, const void *k2, void *ctx) { return k1 == k2; } + +const char *bpf_attach_type_input_str(enum bpf_attach_type t) +{ + switch (t) { + case BPF_CGROUP_INET_INGRESS: return "ingress"; + case BPF_CGROUP_INET_EGRESS: return "egress"; + case BPF_CGROUP_INET_SOCK_CREATE: return "sock_create"; + case BPF_CGROUP_INET_SOCK_RELEASE: return "sock_release"; + case BPF_CGROUP_SOCK_OPS: return "sock_ops"; + case BPF_CGROUP_DEVICE: return "device"; + case BPF_CGROUP_INET4_BIND: return "bind4"; + case BPF_CGROUP_INET6_BIND: return "bind6"; + case BPF_CGROUP_INET4_CONNECT: return "connect4"; + case BPF_CGROUP_INET6_CONNECT: return "connect6"; + case BPF_CGROUP_INET4_POST_BIND: return "post_bind4"; + case BPF_CGROUP_INET6_POST_BIND: return "post_bind6"; + case BPF_CGROUP_INET4_GETPEERNAME: return "getpeername4"; + case BPF_CGROUP_INET6_GETPEERNAME: return "getpeername6"; + case BPF_CGROUP_INET4_GETSOCKNAME: return "getsockname4"; + case BPF_CGROUP_INET6_GETSOCKNAME: return "getsockname6"; + case BPF_CGROUP_UDP4_SENDMSG: return "sendmsg4"; + case BPF_CGROUP_UDP6_SENDMSG: return "sendmsg6"; + case BPF_CGROUP_SYSCTL: return "sysctl"; + case BPF_CGROUP_UDP4_RECVMSG: return "recvmsg4"; + case BPF_CGROUP_UDP6_RECVMSG: return "recvmsg6"; + case BPF_CGROUP_GETSOCKOPT: return "getsockopt"; + case BPF_CGROUP_SETSOCKOPT: return "setsockopt"; + case BPF_TRACE_RAW_TP: return "raw_tp"; + case BPF_TRACE_FENTRY: return "fentry"; + case BPF_TRACE_FEXIT: return "fexit"; + case BPF_MODIFY_RETURN: return "mod_ret"; + case BPF_SK_REUSEPORT_SELECT: return "sk_skb_reuseport_select"; + case BPF_SK_REUSEPORT_SELECT_OR_MIGRATE: return "sk_skb_reuseport_select_or_migrate"; + default: return NULL; + } +} diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c index e27108..66a254 100644 --- a/tools/bpf/bpftool/link.c +++ b/tools/bpf/bpftool/link.c @@ -78,9 +78,11 @@ show_link_header_json(struct bpf_link_info *info, json_writer_t *wtr) static void show_link_attach_type_json(__u32 attach_type, json_writer_t *wtr) { - if (attach_type < ARRAY_SIZE(attach_type_name)) - jsonw_string_field(wtr, "attach_type", - attach_type_name[attach_type]); + const char *attach_type_str; + + attach_type_str = libbpf_bpf_attach_type_str(attach_type); + if (attach_type_str) + jsonw_string_field(wtr, "attach_type", attach_type_str); else jsonw_uint_field(wtr, "attach_type", attach_type); } @@ -196,8 +198,11 @@ static void show_link_header_plain(struct bpf_link_info *info) static void show_link_attach_type_plain(__u32 attach_type) { - if (attach_type < ARRAY_SIZE(attach_type_name)) - printf("attach_type %s ", attach_type_name[attach_type]); + const char *attach_type_str; + + attach_type_str = libbpf_bpf_attach_type_str(attach_type); + if (attach_type_str) + printf("attach_type %s ", attach_type_str); else printf("attach_type %u ", attach_type); } diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h index e4fdaa0..a686b2c 100644 --- a/tools/bpf/bpftool/main.h +++ b/tools/bpf/bpftool/main.h @@ -243,6 +243,23 @@ int print_all_levels(__maybe_unused enum libbpf_print_level level, size_t hash_fn_for_key_as_id(const void *key, void *ctx); bool equal_fn_for_key_as_id(const void *k1, const void *k2, void *ctx); +/** + * bpf_attach_type_input_str - convert the provided attach type value into a + * textual representation that we accept for input purposes. + * + * This function acts is similar in nature to libbpf_bpf_attach_type_str, but + * only recognizes some of attach type names that have been used by the program + * in the past and which do not follow the string inference scheme that libbpf + * uses. + * These textual representations should only be used for user input. + * + * @t: The attach type + * Returns a pointer to a static string identifying the attach type. NULL is + * returned for unknown bpf_attach_type values or those whose representation + * does not differ from that in libbpf itself. + */ +const char *bpf_attach_type_input_str(enum bpf_attach_type t); + static inline void *u32_as_hash_field(__u32 x) { return (void *)(uintptr_t)x; diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index 39e1e71..a45fa3 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -41,12 +41,24 @@ enum dump_mode { DUMP_XLATED, }; +static const bool attach_types[] = { + [BPF_SK_SKB_STREAM_PARSER] = true, + [BPF_SK_SKB_STREAM_VERDICT] = true, + [BPF_SK_SKB_VERDICT] = true, + [BPF_SK_MSG_VERDICT] = true, + [BPF_FLOW_DISSECTOR] = true, + [__MAX_BPF_ATTACH_TYPE] = false, +}; + +/* + * Textual representations traditionally used by the program and kept around for + * the sake of backwards compatibility. + */ static const char * const attach_type_strings[] = { [BPF_SK_SKB_STREAM_PARSER] = "stream_parser", [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict", [BPF_SK_SKB_VERDICT] = "skb_verdict", [BPF_SK_MSG_VERDICT] = "msg_verdict", - [BPF_FLOW_DISSECTOR] = "flow_dissector", [__MAX_BPF_ATTACH_TYPE] = NULL, }; @@ -57,6 +69,14 @@ static enum bpf_attach_type parse_attach_type(const char *str) enum bpf_attach_type type; for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) { + if (attach_types[type]) { + const char *attach_type_str; + + attach_type_str = libbpf_bpf_attach_type_str(type); + if (is_prefix(str, attach_type_str)) + return type; + } + if (attach_type_strings[type] && is_prefix(str, attach_type_strings[type])) return type; @@ -2341,8 +2361,8 @@ static int do_help(int argc, char **argv) " cgroup/sendmsg6 | cgroup/recvmsg4 | cgroup/recvmsg6 |\n" " cgroup/getsockopt | cgroup/setsockopt | cgroup/sock_release |\n" " struct_ops | fentry | fexit | freplace | sk_lookup }\n" - " ATTACH_TYPE := { msg_verdict | skb_verdict | stream_verdict |\n" - " stream_parser | flow_dissector }\n" + " ATTACH_TYPE := { sk_msg_verdict | sk_skb_verdict | sk_skb_stream_verdict |\n" + " sk_skb_stream_parser | flow_dissector }\n" " METRIC := { cycles | instructions | l1d_loads | llc_misses | itlb_misses | dtlb_misses }\n" " " HELP_SPEC_OPTIONS " |\n" " {-f|--bpffs} | {-m|--mapcompat} | {-n|--nomount} |\n" diff --git a/tools/testing/selftests/bpf/test_bpftool_synctypes.py b/tools/testing/selftests/bpf/test_bpftool_synctypes.py index c0e7acd..0ca3c1 100755 --- a/tools/testing/selftests/bpf/test_bpftool_synctypes.py +++ b/tools/testing/selftests/bpf/test_bpftool_synctypes.py @@ -58,7 +58,7 @@ class BlockParser(object): class ArrayParser(BlockParser): """ - A parser for extracting dicionaries of values from some BPF-related arrays. + A parser for extracting a set of values from some BPF-related arrays. @reader: a pointer to the open file to parse @array_name: name of the array to parse """ @@ -66,7 +66,7 @@ class ArrayParser(BlockParser): def __init__(self, reader, array_name): self.array_name = array_name - self.start_marker = re.compile(f'(static )?const char \* const {self.array_name}\[.*\] = {{\n') + self.start_marker = re.compile(f'(static )?const bool {self.array_name}\[.*\] = {{\n') super().__init__(reader) def search_block(self): @@ -80,15 +80,15 @@ class ArrayParser(BlockParser): Parse a block and return data as a dictionary. Items to extract must be on separate lines in the file. """ - pattern = re.compile('\[(BPF_\w*)\]\s*= "(.*)",?$') - entries = {} + pattern = re.compile('\[(BPF_\w*)\]\s*= (true|false),?$') + entries = set() while True: line = self.reader.readline() if line == '' or re.match(self.end_marker, line): break capture = pattern.search(line) if capture: - entries[capture.group(1)] = capture.group(2) + entries |= {capture.group(1)} return entries class InlineListParser(BlockParser): @@ -115,7 +115,7 @@ class InlineListParser(BlockParser): class FileExtractor(object): """ A generic reader for extracting data from a given file. This class contains - several helper methods that wrap arround parser objects to extract values + several helper methods that wrap around parser objects to extract values from different structures. This class does not offer a way to set a filename, which is expected to be defined in children classes. @@ -139,21 +139,20 @@ class FileExtractor(object): def get_types_from_array(self, array_name): """ - Search for and parse an array associating names to BPF_* enum members, - for example: + Search for and parse an array white-listing BPF_* enum members, for + example: - const char * const prog_type_name[] = { - [BPF_PROG_TYPE_UNSPEC] = "unspec", - [BPF_PROG_TYPE_SOCKET_FILTER] = "socket_filter", - [BPF_PROG_TYPE_KPROBE] = "kprobe", + const bool prog_type_name[] = { + [BPF_PROG_TYPE_UNSPEC] = true, + [BPF_PROG_TYPE_SOCKET_FILTER] = true, + [BPF_PROG_TYPE_KPROBE] = true, }; - Return a dictionary with the enum member names as keys and the - associated names as values, for example: + Return a set of the enum members, for example: - {'BPF_PROG_TYPE_UNSPEC': 'unspec', - 'BPF_PROG_TYPE_SOCKET_FILTER': 'socket_filter', - 'BPF_PROG_TYPE_KPROBE': 'kprobe'} + {'BPF_PROG_TYPE_UNSPEC', + 'BPF_PROG_TYPE_SOCKET_FILTER', + 'BPF_PROG_TYPE_KPROBE'} @array_name: name of the array to parse """ @@ -186,6 +185,27 @@ class FileExtractor(object): parser.search_block(start_marker) return parser.parse(pattern, end_marker) + def make_enum_map(self, names, enum_prefix): + """ + Search for and parse an enum containing BPF_* members, just as get_enum + does. However, instead of just returning a set of the variant names, + also generate a textual representation from them by (assuming and) + removing a provided prefix and lowercasing the remainder. Then return a + dict mapping from name to textual representation. + + @enum_values: a set of enum values; e.g., as retrieved by get_enum + @enum_prefix: the prefix to remove from each of the variants to infer + textual representation + """ + mapping = {} + for name in names: + if not name.startswith(enum_prefix): + raise Exception(f"enum variant {name} does not start with {enum_prefix}") + text = name[len(enum_prefix):].lower() + mapping[name] = text + + return mapping + def __get_description_list(self, start_marker, pattern, end_marker): parser = InlineListParser(self.reader) parser.search_block(start_marker) @@ -333,11 +353,9 @@ class ProgFileExtractor(SourceFileExtractor): """ filename = os.path.join(BPFTOOL_DIR, 'prog.c') - def get_prog_types(self): - return self.get_types_from_array('prog_type_name') - def get_attach_types(self): - return self.get_types_from_array('attach_type_strings') + types = self.get_types_from_array('attach_types') + return self.make_enum_map(types, 'BPF_') def get_prog_attach_help(self): return self.get_help_list('ATTACH_TYPE') @@ -348,9 +366,6 @@ class MapFileExtractor(SourceFileExtractor): """ filename = os.path.join(BPFTOOL_DIR, 'map.c') - def get_map_types(self): - return self.get_types_from_array('map_type_name') - def get_map_help(self): return self.get_help_list('TYPE') @@ -363,30 +378,6 @@ class CgroupFileExtractor(SourceFileExtractor): def get_prog_attach_help(self): return self.get_help_list('ATTACH_TYPE') -class CommonFileExtractor(SourceFileExtractor): - """ - An extractor for bpftool's common.c. - """ - filename = os.path.join(BPFTOOL_DIR, 'common.c') - - def __init__(self): - super().__init__() - self.attach_types = {} - - def get_attach_types(self): - if not self.attach_types: - self.attach_types = self.get_types_from_array('attach_type_name') - return self.attach_types - - def get_cgroup_attach_types(self): - if not self.attach_types: - self.get_attach_types() - cgroup_types = {} - for (key, value) in self.attach_types.items(): - if key.find('BPF_CGROUP') != -1: - cgroup_types[key] = value - return cgroup_types - class GenericSourceExtractor(SourceFileExtractor): """ An extractor for generic source code files. @@ -403,14 +394,28 @@ class BpfHeaderExtractor(FileExtractor): """ filename = os.path.join(INCLUDE_DIR, 'uapi/linux/bpf.h') + def __init__(self): + super().__init__() + self.attach_types = {} + def get_prog_types(self): return self.get_enum('bpf_prog_type') - def get_map_types(self): - return self.get_enum('bpf_map_type') + def get_map_type_map(self): + names = self.get_enum('bpf_map_type') + return self.make_enum_map(names, 'BPF_MAP_TYPE_') - def get_attach_types(self): - return self.get_enum('bpf_attach_type') + def get_attach_type_map(self): + if not self.attach_types: + names = self.get_enum('bpf_attach_type') + self.attach_types = self.make_enum_map(names, 'BPF_') + return self.attach_types + + def get_cgroup_attach_type_map(self): + if not self.attach_types: + self.get_attach_type_map() + return {name: text for name, text in self.attach_types.items() + if name.startswith('BPF_CGROUP')} class ManPageExtractor(FileExtractor): """ @@ -495,21 +500,12 @@ def main(): """) args = argParser.parse_args() - # Map types (enum) - bpf_info = BpfHeaderExtractor() - ref = bpf_info.get_map_types() - - map_info = MapFileExtractor() - source_map_items = map_info.get_map_types() - map_types_enum = set(source_map_items.keys()) - - verify(ref, map_types_enum, - f'Comparing BPF header (enum bpf_map_type) and {MapFileExtractor.filename} (map_type_name):') # Map types (names) - source_map_types = set(source_map_items.values()) + map_info = MapFileExtractor() + source_map_types = set(bpf_info.get_map_type_map().values()) source_map_types.discard('unspec') help_map_types = map_info.get_map_help() @@ -525,34 +521,18 @@ def main(): bashcomp_map_types = bashcomp_info.get_map_types() verify(source_map_types, help_map_types, - f'Comparing {MapFileExtractor.filename} (map_type_name) and {MapFileExtractor.filename} (do_help() TYPE):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {MapFileExtractor.filename} (do_help() TYPE):') verify(source_map_types, man_map_types, - f'Comparing {MapFileExtractor.filename} (map_type_name) and {ManMapExtractor.filename} (TYPE):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {ManMapExtractor.filename} (TYPE):') verify(help_map_options, man_map_options, f'Comparing {MapFileExtractor.filename} (do_help() OPTIONS) and {ManMapExtractor.filename} (OPTIONS):') verify(source_map_types, bashcomp_map_types, - f'Comparing {MapFileExtractor.filename} (map_type_name) and {BashcompExtractor.filename} (BPFTOOL_MAP_CREATE_TYPES):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_map_type) and {BashcompExtractor.filename} (BPFTOOL_MAP_CREATE_TYPES):') # Program types (enum) - ref = bpf_info.get_prog_types() - prog_info = ProgFileExtractor() - prog_types = set(prog_info.get_prog_types().keys()) - - verify(ref, prog_types, - f'Comparing BPF header (enum bpf_prog_type) and {ProgFileExtractor.filename} (prog_type_name):') - - # Attach types (enum) - - ref = bpf_info.get_attach_types() - bpf_info.close() - - common_info = CommonFileExtractor() - attach_types = common_info.get_attach_types() - - verify(ref, attach_types, - f'Comparing BPF header (enum bpf_attach_type) and {CommonFileExtractor.filename} (attach_type_name):') + prog_types = bpf_info.get_prog_types() # Attach types (names) @@ -571,18 +551,17 @@ def main(): bashcomp_prog_attach_types = bashcomp_info.get_prog_attach_types() verify(source_prog_attach_types, help_prog_attach_types, - f'Comparing {ProgFileExtractor.filename} (attach_type_strings) and {ProgFileExtractor.filename} (do_help() ATTACH_TYPE):') + f'Comparing {ProgFileExtractor.filename} (bpf_attach_type) and {ProgFileExtractor.filename} (do_help() ATTACH_TYPE):') verify(source_prog_attach_types, man_prog_attach_types, - f'Comparing {ProgFileExtractor.filename} (attach_type_strings) and {ManProgExtractor.filename} (ATTACH_TYPE):') + f'Comparing {ProgFileExtractor.filename} (bpf_attach_type) and {ManProgExtractor.filename} (ATTACH_TYPE):') verify(help_prog_options, man_prog_options, f'Comparing {ProgFileExtractor.filename} (do_help() OPTIONS) and {ManProgExtractor.filename} (OPTIONS):') verify(source_prog_attach_types, bashcomp_prog_attach_types, - f'Comparing {ProgFileExtractor.filename} (attach_type_strings) and {BashcompExtractor.filename} (BPFTOOL_PROG_ATTACH_TYPES):') + f'Comparing {ProgFileExtractor.filename} (bpf_attach_type) and {BashcompExtractor.filename} (BPFTOOL_PROG_ATTACH_TYPES):') # Cgroup attach types - - source_cgroup_attach_types = set(common_info.get_cgroup_attach_types().values()) - common_info.close() + source_cgroup_attach_types = set(bpf_info.get_cgroup_attach_type_map().values()) + bpf_info.close() cgroup_info = CgroupFileExtractor() help_cgroup_attach_types = cgroup_info.get_prog_attach_help() @@ -598,13 +577,13 @@ def main(): bashcomp_info.close() verify(source_cgroup_attach_types, help_cgroup_attach_types, - f'Comparing {CommonFileExtractor.filename} (attach_type_strings) and {CgroupFileExtractor.filename} (do_help() ATTACH_TYPE):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {CgroupFileExtractor.filename} (do_help() ATTACH_TYPE):') verify(source_cgroup_attach_types, man_cgroup_attach_types, - f'Comparing {CommonFileExtractor.filename} (attach_type_strings) and {ManCgroupExtractor.filename} (ATTACH_TYPE):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {ManCgroupExtractor.filename} (ATTACH_TYPE):') verify(help_cgroup_options, man_cgroup_options, f'Comparing {CgroupFileExtractor.filename} (do_help() OPTIONS) and {ManCgroupExtractor.filename} (OPTIONS):') verify(source_cgroup_attach_types, bashcomp_cgroup_attach_types, - f'Comparing {CommonFileExtractor.filename} (attach_type_strings) and {BashcompExtractor.filename} (BPFTOOL_CGROUP_ATTACH_TYPES):') + f'Comparing {BpfHeaderExtractor.filename} (bpf_attach_type) and {BashcompExtractor.filename} (BPFTOOL_CGROUP_ATTACH_TYPES):') # Options for remaining commands From patchwork Thu May 19 21:29:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856072 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD7EBC433FE for ; Thu, 19 May 2022 21:30:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231725AbiESVa3 (ORCPT ); Thu, 19 May 2022 17:30:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234614AbiESVa2 (ORCPT ); Thu, 19 May 2022 17:30:28 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E20E8A76C3 for ; Thu, 19 May 2022 14:30:27 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 8E78724010A for ; Thu, 19 May 2022 23:30:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995826; bh=o9scW/TMOCQvDl93umGSK3nfOk+sXr75z2BUpzA8Eik=; h=From:To:Cc:Subject:Date:From; b=Q/tFmeN7ls2gjogEESMnA5hWIZ44O2chQR3iL9unM1FxTYfn1LPGwVMnt5WQnjdT2 AfvEXImPBJK+6mrEULdx6S34i8jG6Bj57EMhQilgCaIFcj3vfKF0JI5jeDkvAegG96 WGpMTzVsy75aWOGSNmXAg/1AU6Z2w/NMdXnS2+p4dyIQZVXSOJ9d1BClfgVJNxJ01H v0U7cukAmVKHmfMc2XE8nv5WLT2DgN5v1BlNIl+jFFhqpwF6beNoOszcOrwFuXhjuw xCnK2qTztzdy/P0F0cRRcxNjOT/bZw9R9uRCW+tkzk8WDT9bkftrQQqg7O6u3nQm3i cct1CI7PT/vDg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L431F54Ynz9rxF; Thu, 19 May 2022 23:30:25 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 10/12] libbpf: Introduce libbpf_bpf_link_type_str Date: Thu, 19 May 2022 21:29:59 +0000 Message-Id: <20220519213001.729261-11-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change introduces a new function, libbpf_bpf_link_type_str, to the public libbpf API. The function allows users to get a string representation for a bpf_link_type enum variant. Signed-off-by: Daniel Müller --- tools/lib/bpf/libbpf.c | 21 +++++++++++++++++++++ tools/lib/bpf/libbpf.h | 9 +++++++++ tools/lib/bpf/libbpf.map | 1 + 3 files changed, 31 insertions(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index bc56e9c..74f375 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -118,6 +118,19 @@ static const char * const attach_type_name[] = { [BPF_TRACE_KPROBE_MULTI] = "trace_kprobe_multi", }; +static const char * const link_type_name[] = { + [BPF_LINK_TYPE_UNSPEC] = "unspec", + [BPF_LINK_TYPE_RAW_TRACEPOINT] = "raw_tracepoint", + [BPF_LINK_TYPE_TRACING] = "tracing", + [BPF_LINK_TYPE_CGROUP] = "cgroup", + [BPF_LINK_TYPE_ITER] = "iter", + [BPF_LINK_TYPE_NETNS] = "netns", + [BPF_LINK_TYPE_XDP] = "xdp", + [BPF_LINK_TYPE_PERF_EVENT] = "perf_event", + [BPF_LINK_TYPE_KPROBE_MULTI] = "kprobe_multi", + [BPF_LINK_TYPE_STRUCT_OPS] = "struct_ops", +}; + static const char * const map_type_name[] = { [BPF_MAP_TYPE_UNSPEC] = "unspec", [BPF_MAP_TYPE_HASH] = "hash", @@ -9423,6 +9436,14 @@ const char *libbpf_bpf_attach_type_str(enum bpf_attach_type t) return attach_type_name[t]; } +const char *libbpf_bpf_link_type_str(enum bpf_link_type t) +{ + if (t < 0 || t >= ARRAY_SIZE(link_type_name)) + return NULL; + + return link_type_name[t]; +} + const char *libbpf_bpf_map_type_str(enum bpf_map_type t) { if (t < 0 || t >= ARRAY_SIZE(map_type_name)) diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 37a234..5b34ca 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -60,6 +60,15 @@ LIBBPF_API int libbpf_strerror(int err, char *buf, size_t size); */ LIBBPF_API const char *libbpf_bpf_attach_type_str(enum bpf_attach_type t); +/** + * @brief **libbpf_bpf_link_type_str()** converts the provided link type value + * into a textual representation. + * @param t The link type. + * @return Pointer to a static string identifying the link type. NULL is + * returned for unknown **bpf_link_type** values. + */ +LIBBPF_API const char *libbpf_bpf_link_type_str(enum bpf_link_type t); + /** * @brief **libbpf_bpf_map_type_str()** converts the provided map type value * into a textual representation. diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 44c536..38e284 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -463,6 +463,7 @@ LIBBPF_0.8.0 { LIBBPF_1.0.0 { global: libbpf_bpf_attach_type_str; + libbpf_bpf_link_type_str; libbpf_bpf_map_type_str; libbpf_bpf_prog_type_str; From patchwork Thu May 19 21:30:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856074 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C064C433EF for ; Thu, 19 May 2022 21:30:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234614AbiESVad (ORCPT ); Thu, 19 May 2022 17:30:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234567AbiESVac (ORCPT ); Thu, 19 May 2022 17:30:32 -0400 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8CCA6E8CD for ; Thu, 19 May 2022 14:30:30 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 9A5BF240028 for ; Thu, 19 May 2022 23:30:29 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995829; bh=vFwroQ+ZcFTzYzu6CcYEgLqnok5nhecsV5aUkDQole8=; h=From:To:Cc:Subject:Date:From; b=YMQMO/ZsmXvbO4Q89k/y2z6HsqsGth2CwFpWGqXQs7kTiGYWx/u2bbB2Pr7TfGYnU WNhpgevEYVDxl4x9muQqC4fVvC1ccLIlL56muOIVii1bJAvWs7OO8wzzAppHD7zYon xU36FcARQwCARwgZYag2S91O32vve6aURpFbTDACquway8TYUlrElEPhf6vsywgiOX nJ9hRWpPZ/GCjyRKNM281sjnU3TKGlhWs7LiNKVYQQySdFg7eCKYM2NFFC9UCdxpl3 xwcyKYpKjBVT1ToBxmN4D2uo9kRvjavQGhuRh6YK9Y84lMD7oo9+oRQtj/qQ9Uirlt UXVTgD6lx0Nqg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L431H5FRFz6tss; Thu, 19 May 2022 23:30:27 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 11/12] selftests/bpf: Add test for libbpf_bpf_link_type_str Date: Thu, 19 May 2022 21:30:00 +0000 Message-Id: <20220519213001.729261-12-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change adds a test for libbpf_bpf_link_type_str. The test retrieves all variants of the bpf_link_type enumeration using BTF and makes sure that the function under test works as expected for them. Signed-off-by: Daniel Müller --- .../selftests/bpf/prog_tests/libbpf_str.c | 48 +++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c index f5fa09..1e45dd 100644 --- a/tools/testing/selftests/bpf/prog_tests/libbpf_str.c +++ b/tools/testing/selftests/bpf/prog_tests/libbpf_str.c @@ -59,6 +59,51 @@ static void test_libbpf_bpf_attach_type_str(void) btf__free(btf); } +/** + * Test case to check that all bpf_link_type variants are covered by + * libbpf_bpf_link_type_str. + */ +static void test_libbpf_bpf_link_type_str(void) +{ + struct btf *btf; + const struct btf_type *t; + const struct btf_enum *e; + int i, n, id; + + btf = btf__parse("/sys/kernel/btf/vmlinux", NULL); + if (!ASSERT_OK_PTR(btf, "btf_parse")) + return; + + /* find enum bpf_link_type and enumerate each value */ + id = btf__find_by_name_kind(btf, "bpf_link_type", BTF_KIND_ENUM); + if (!ASSERT_GT(id, 0, "bpf_link_type_id")) + goto cleanup; + t = btf__type_by_id(btf, id); + e = btf_enum(t); + n = btf_vlen(t); + for (i = 0; i < n; e++, i++) { + enum bpf_link_type link_type = (enum bpf_link_type)e->val; + const char *link_type_name; + const char *link_type_str; + char buf[256]; + + if (link_type == MAX_BPF_LINK_TYPE) + continue; + + link_type_name = btf__str_by_offset(btf, e->name_off); + link_type_str = libbpf_bpf_link_type_str(link_type); + ASSERT_OK_PTR(link_type_str, link_type_name); + + snprintf(buf, sizeof(buf), "BPF_LINK_TYPE_%s", link_type_str); + uppercase(buf); + + ASSERT_STREQ(buf, link_type_name, "exp_str_value"); + } + +cleanup: + btf__free(btf); +} + /** * Test case to check that all bpf_map_type variants are covered by * libbpf_bpf_map_type_str. @@ -151,6 +196,9 @@ void test_libbpf_str(void) if (test__start_subtest("bpf_attach_type_str")) test_libbpf_bpf_attach_type_str(); + if (test__start_subtest("bpf_link_type_str")) + test_libbpf_bpf_link_type_str(); + if (test__start_subtest("bpf_map_type_str")) test_libbpf_bpf_map_type_str(); From patchwork Thu May 19 21:30:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_M=C3=BCller?= X-Patchwork-Id: 12856075 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68518C433EF for ; Thu, 19 May 2022 21:30:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234672AbiESVaf (ORCPT ); Thu, 19 May 2022 17:30:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36020 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234722AbiESVaf (ORCPT ); Thu, 19 May 2022 17:30:35 -0400 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A2A9F1358 for ; Thu, 19 May 2022 14:30:33 -0700 (PDT) Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 1D17524010B for ; Thu, 19 May 2022 23:30:32 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1652995832; bh=LPOX4mr6qOBGXTuxqzj7L3VNNnBuyqF+gXX9fAz5lMM=; h=From:To:Cc:Subject:Date:From; b=esPzSvkISfJ/VaejZTa66NaObykD4Ql7ZK3swGAm5SCsfXLgzumGoSAeWQuJ6F6Hu +ufP9xYVkkbTGaVi2+TBTRjW2EPbL4UZi/wbUNT8/7pwCD2/TEja83CjeyuY1iZYIt IrQVOZcQaflaVnqWGhHsvNy+k2hAYm7mfyK3pE+UALLUpBI5VfIuZFyBQ67785pMSW iAxQY9429nt2wEkQI9DziBRWca5c3k0LtXUo/NKYWUcOOGLqlNk49hd5X5RoM+kyA3 cJXQunPqWM+CWen6rxFmIuyasnwQetVu0Z/WIQiDoUIBwLswlCDxxnWriGxB8Qqh0J M/DNBEeTLmfeQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4L431L0TCcz6tpm; Thu, 19 May 2022 23:30:30 +0200 (CEST) From: =?utf-8?q?Daniel_M=C3=BCller?= To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kernel-team@fb.com Cc: yhs@fb.com, quentin@isovalent.com Subject: [PATCH bpf-next v3 12/12] bpftool: Use libbpf_bpf_link_type_str Date: Thu, 19 May 2022 21:30:01 +0000 Message-Id: <20220519213001.729261-13-deso@posteo.net> In-Reply-To: <20220519213001.729261-1-deso@posteo.net> References: <20220519213001.729261-1-deso@posteo.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net This change switches bpftool over to using the recently introduced libbpf_bpf_link_type_str function instead of maintaining its own string representation for the bpf_link_type enum. Signed-off-by: Daniel Müller --- tools/bpf/bpftool/link.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) diff --git a/tools/bpf/bpftool/link.c b/tools/bpf/bpftool/link.c index 66a254..7a2093 100644 --- a/tools/bpf/bpftool/link.c +++ b/tools/bpf/bpftool/link.c @@ -13,19 +13,6 @@ #include "json_writer.h" #include "main.h" -static const char * const link_type_name[] = { - [BPF_LINK_TYPE_UNSPEC] = "unspec", - [BPF_LINK_TYPE_RAW_TRACEPOINT] = "raw_tracepoint", - [BPF_LINK_TYPE_TRACING] = "tracing", - [BPF_LINK_TYPE_CGROUP] = "cgroup", - [BPF_LINK_TYPE_ITER] = "iter", - [BPF_LINK_TYPE_NETNS] = "netns", - [BPF_LINK_TYPE_XDP] = "xdp", - [BPF_LINK_TYPE_PERF_EVENT] = "perf_event", - [BPF_LINK_TYPE_KPROBE_MULTI] = "kprobe_multi", - [BPF_LINK_TYPE_STRUCT_OPS] = "struct_ops", -}; - static struct hashmap *link_table; static int link_parse_fd(int *argc, char ***argv) @@ -67,9 +54,12 @@ static int link_parse_fd(int *argc, char ***argv) static void show_link_header_json(struct bpf_link_info *info, json_writer_t *wtr) { + const char *link_type_str; + jsonw_uint_field(wtr, "id", info->id); - if (info->type < ARRAY_SIZE(link_type_name)) - jsonw_string_field(wtr, "type", link_type_name[info->type]); + link_type_str = libbpf_bpf_link_type_str(info->type); + if (link_type_str) + jsonw_string_field(wtr, "type", link_type_str); else jsonw_uint_field(wtr, "type", info->type); @@ -187,9 +177,12 @@ static int show_link_close_json(int fd, struct bpf_link_info *info) static void show_link_header_plain(struct bpf_link_info *info) { + const char *link_type_str; + printf("%u: ", info->id); - if (info->type < ARRAY_SIZE(link_type_name)) - printf("%s ", link_type_name[info->type]); + link_type_str = libbpf_bpf_link_type_str(info->type); + if (link_type_str) + printf("%s ", link_type_str); else printf("type %u ", info->type);