From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9226A43AE1; Thu, 8 Feb 2024 18:51:24 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id D767242E4D; Thu, 8 Feb 2024 18:51:06 +0100 (CET) Received: from mail-pg1-f179.google.com (mail-pg1-f179.google.com [209.85.215.179]) by mails.dpdk.org (Postfix) with ESMTP id 5829242E04 for ; Thu, 8 Feb 2024 18:51:04 +0100 (CET) Received: by mail-pg1-f179.google.com with SMTP id 41be03b00d2f7-5ca29c131ebso10774a12.0 for ; Thu, 08 Feb 2024 09:51:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1707414663; x=1708019463; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=mP60+k5ZPeJeBS5jRMFk72yyTGUxHj9BuzlrQpIYSFE=; b=sGubokjAFtMv3POfLf2uohj8DKq749GOvPVDJ1dWtc9oOq9hDJhxW6UMxqtJFjLTP6 f1H9nGegj3PXXx0IlLn7VNetdi50wF4+RputM73RDsa+UYELHYeWjegrXqh1ji2rBe6T FHwqdMP+7/C3wDKn8KyxmzoKl/TvjpkHX0uYj4lCkXaLyWAhNK57hdoxx47mIGtHivUJ lQQ/36r5KtoLtYCT+Zr1s39L6ehyL2R0wQaexRtmd4Rgsmj6DYR8OWiViaybwq6pGu2m 8tsu8lXhsmItQe0XAyljr/PEsTp2/FXDYjbP9wG32/KsJaP5/EYXcv9BsDNGDth0gn1F 4JlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707414663; x=1708019463; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=mP60+k5ZPeJeBS5jRMFk72yyTGUxHj9BuzlrQpIYSFE=; b=vl1Bu9/fXQ2GU1QI+lTowE8GUlVzJNISJdnkmBheFS5i6z25niZ8EpRH6vWnc9KkN8 NmYnVPWMe5lsEOLAx7j1PW7dbPqQf5prKki24dYZHqVp32y7mPhfuvSKxUBX0eh6bvDR VDCNz9ba/n9+ILmE688LMycouKEFnFzpzODMtMcDev8tzFroo5Lf0nd0H4gwqxGNaRRj cv02VGZ6eJ7rvwTv36rC75qPmPXWJ+3og2e69Y3Zkh8TDAG+Jr0S9JBVW5zrJF0DND/P P9neyUESLj/IZnghL9V1+M4x9Mz0biPjc2luNHgH2PfT1ZBYwwkYyuQWaVEXuq4ZbsBY QKnA== X-Gm-Message-State: AOJu0Yyevpg8liTKb2JRpE1H5OQxa6XAnO3IHyt6o5U6y2R8oRllRbd3 BHnk/S93dbsJzkBpIKXdixobBGYn1Rla5nlzUs2b6dbanhrm/PcqKDQCKyphBMPj9VJteylr9tp s4N0= X-Google-Smtp-Source: AGHT+IGo5jDa8ezZXPxygnj6yIo4Na3PpgezcWRhe05JlzHSLfSaB5xVULfl1wzSEB7q7POWZXCNWg== X-Received: by 2002:a05:6a21:610:b0:19e:99ce:6f99 with SMTP id ll16-20020a056a21061000b0019e99ce6f99mr248546pzb.44.1707414663476; Thu, 08 Feb 2024 09:51:03 -0800 (PST) Received: from hermes.local (204-195-123-141.wavecable.com. [204.195.123.141]) by smtp.gmail.com with ESMTPSA id f19-20020a056a00229300b006dbda7bcf3csm5030pfe.83.2024.02.08.09.51.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Feb 2024 09:51:03 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger Subject: [PATCH v3 3/7] tap: stop "vendoring" linux bpf headers Date: Thu, 8 Feb 2024 09:41:27 -0800 Message-ID: <20240208175051.326550-4-stephen@networkplumber.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240208175051.326550-1-stephen@networkplumber.org> References: <20240130034925.44869-1-stephen@networkplumber.org> <20240208175051.326550-1-stephen@networkplumber.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The proper place for finding bpf structures and functions is in linux/bpf.h. The original version was trying to workaround the case where the build environment was running on old pre BPF version of Glibc, but the target environment had BPF. This is not a supportable build method, and not how rest of DPDK works. Having own private (and divergent) version headers leads to future problems when BPF definitions evolve. Since DPDK officially supports only LTS or later kernel there is no need for the #ifdef workarounds in the TAP flow code. Cloning headers leads to problems and no longer needed. Signed-off-by: Stephen Hemminger --- drivers/net/tap/bpf/bpf_extract.py | 1 - drivers/net/tap/tap_bpf.h | 121 ----------------------------- drivers/net/tap/tap_bpf_api.c | 20 +++-- drivers/net/tap/tap_bpf_insns.h | 1 - drivers/net/tap/tap_flow.c | 89 --------------------- 5 files changed, 13 insertions(+), 219 deletions(-) delete mode 100644 drivers/net/tap/tap_bpf.h diff --git a/drivers/net/tap/bpf/bpf_extract.py b/drivers/net/tap/bpf/bpf_extract.py index b630c42b809f..73c4dafe4eca 100644 --- a/drivers/net/tap/bpf/bpf_extract.py +++ b/drivers/net/tap/bpf/bpf_extract.py @@ -65,7 +65,6 @@ def write_header(out, source): print(f' * Auto-generated from {source}', file=out) print(" * This not the original source file. Do NOT edit it.", file=out) print(" */\n", file=out) - print("#include ", file=out) def main(): diff --git a/drivers/net/tap/tap_bpf.h b/drivers/net/tap/tap_bpf.h deleted file mode 100644 index 0d38bc111fe0..000000000000 --- a/drivers/net/tap/tap_bpf.h +++ /dev/null @@ -1,121 +0,0 @@ -/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 - * Copyright 2017 Mellanox Technologies, Ltd - */ - -#ifndef __TAP_BPF_H__ -#define __TAP_BPF_H__ - -#include - -/* Do not #include since eBPF must compile on different - * distros which may include partial definitions for eBPF (while the - * kernel itself may support eBPF). Instead define here all that is needed - */ - -/* BPF_MAP_UPDATE_ELEM command flags */ -#define BPF_ANY 0 /* create a new element or update an existing */ - -/* BPF architecture instruction struct */ -struct bpf_insn { - __u8 code; - __u8 dst_reg:4; - __u8 src_reg:4; - __s16 off; - __s32 imm; /* immediate value */ -}; - -/* BPF program types */ -enum bpf_prog_type { - BPF_PROG_TYPE_UNSPEC, - BPF_PROG_TYPE_SOCKET_FILTER, - BPF_PROG_TYPE_KPROBE, - BPF_PROG_TYPE_SCHED_CLS, - BPF_PROG_TYPE_SCHED_ACT, -}; - -/* BPF commands types */ -enum bpf_cmd { - BPF_MAP_CREATE, - BPF_MAP_LOOKUP_ELEM, - BPF_MAP_UPDATE_ELEM, - BPF_MAP_DELETE_ELEM, - BPF_MAP_GET_NEXT_KEY, - BPF_PROG_LOAD, -}; - -/* BPF maps types */ -enum bpf_map_type { - BPF_MAP_TYPE_UNSPEC, - BPF_MAP_TYPE_HASH, -}; - -/* union of anonymous structs used with TAP BPF commands */ -union bpf_attr { - /* BPF_MAP_CREATE command */ - struct { - __u32 map_type; - __u32 key_size; - __u32 value_size; - __u32 max_entries; - __u32 map_flags; - __u32 inner_map_fd; - }; - - /* BPF_MAP_UPDATE_ELEM, BPF_MAP_DELETE_ELEM commands */ - struct { - __u32 map_fd; - __aligned_u64 key; - union { - __aligned_u64 value; - __aligned_u64 next_key; - }; - __u64 flags; - }; - - /* BPF_PROG_LOAD command */ - struct { - __u32 prog_type; - __u32 insn_cnt; - __aligned_u64 insns; - __aligned_u64 license; - __u32 log_level; - __u32 log_size; - __aligned_u64 log_buf; - __u32 kern_version; - __u32 prog_flags; - }; -} __rte_aligned(8); - -#ifndef __NR_bpf -# if defined(__i386__) -# define __NR_bpf 357 -# elif defined(__x86_64__) -# define __NR_bpf 321 -# elif defined(__arm__) -# define __NR_bpf 386 -# elif defined(__aarch64__) -# define __NR_bpf 280 -# elif defined(__sparc__) -# define __NR_bpf 349 -# elif defined(__s390__) -# define __NR_bpf 351 -# elif defined(__powerpc__) -# define __NR_bpf 361 -# elif defined(__riscv) -# define __NR_bpf 280 -# elif defined(__loongarch__) -# define __NR_bpf 280 -# else -# error __NR_bpf not defined -# endif -#endif - -enum { - BPF_MAP_ID_KEY, - BPF_MAP_ID_SIMPLE, -}; - -static int bpf_load(enum bpf_prog_type type, const struct bpf_insn *insns, - size_t insns_cnt, const char *license); - -#endif /* __TAP_BPF_H__ */ diff --git a/drivers/net/tap/tap_bpf_api.c b/drivers/net/tap/tap_bpf_api.c index 15283f8917ed..9e05e2ddf19b 100644 --- a/drivers/net/tap/tap_bpf_api.c +++ b/drivers/net/tap/tap_bpf_api.c @@ -2,19 +2,19 @@ * Copyright 2017 Mellanox Technologies, Ltd */ -#include -#include #include -#include +#include +#include -#include -#include #include #include -#include -#include + #include + +static int bpf_load(enum bpf_prog_type type, const struct bpf_insn *insns, + size_t insns_cnt, const char *license); + /** * Load BPF program (section cls_q) into the kernel and return a bpf fd * @@ -89,7 +89,13 @@ static inline __u64 ptr_to_u64(const void *ptr) static inline int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size) { +#ifdef __NR_bpf return syscall(__NR_bpf, cmd, attr, size); +#else + TAP_LOG(ERR, "No bpf syscall, kernel headers too old?\n"); + errno = ENOSYS; + return -1; +#endif } /** diff --git a/drivers/net/tap/tap_bpf_insns.h b/drivers/net/tap/tap_bpf_insns.h index ee26cf885ed7..b59b7e9141fd 100644 --- a/drivers/net/tap/tap_bpf_insns.h +++ b/drivers/net/tap/tap_bpf_insns.h @@ -3,7 +3,6 @@ * This not the original source file. Do NOT edit it. */ -#include static struct bpf_insn cls_q_insns[] = { {0x61, 2, 1, 52, 0x00000000}, diff --git a/drivers/net/tap/tap_flow.c b/drivers/net/tap/tap_flow.c index cd49aa51c8b0..94436af55ce8 100644 --- a/drivers/net/tap/tap_flow.c +++ b/drivers/net/tap/tap_flow.c @@ -20,95 +20,6 @@ #include #include -#ifndef HAVE_TC_FLOWER -/* - * For kernels < 4.2, this enum is not defined. Runtime checks will be made to - * avoid sending TC messages the kernel cannot understand. - */ -enum { - TCA_FLOWER_UNSPEC, - TCA_FLOWER_CLASSID, - TCA_FLOWER_INDEV, - TCA_FLOWER_ACT, - TCA_FLOWER_KEY_ETH_DST, /* ETH_ALEN */ - TCA_FLOWER_KEY_ETH_DST_MASK, /* ETH_ALEN */ - TCA_FLOWER_KEY_ETH_SRC, /* ETH_ALEN */ - TCA_FLOWER_KEY_ETH_SRC_MASK, /* ETH_ALEN */ - TCA_FLOWER_KEY_ETH_TYPE, /* be16 */ - TCA_FLOWER_KEY_IP_PROTO, /* u8 */ - TCA_FLOWER_KEY_IPV4_SRC, /* be32 */ - TCA_FLOWER_KEY_IPV4_SRC_MASK, /* be32 */ - TCA_FLOWER_KEY_IPV4_DST, /* be32 */ - TCA_FLOWER_KEY_IPV4_DST_MASK, /* be32 */ - TCA_FLOWER_KEY_IPV6_SRC, /* struct in6_addr */ - TCA_FLOWER_KEY_IPV6_SRC_MASK, /* struct in6_addr */ - TCA_FLOWER_KEY_IPV6_DST, /* struct in6_addr */ - TCA_FLOWER_KEY_IPV6_DST_MASK, /* struct in6_addr */ - TCA_FLOWER_KEY_TCP_SRC, /* be16 */ - TCA_FLOWER_KEY_TCP_DST, /* be16 */ - TCA_FLOWER_KEY_UDP_SRC, /* be16 */ - TCA_FLOWER_KEY_UDP_DST, /* be16 */ -}; -#endif -#ifndef HAVE_TC_VLAN_ID -enum { - /* TCA_FLOWER_FLAGS, */ - TCA_FLOWER_KEY_VLAN_ID = TCA_FLOWER_KEY_UDP_DST + 2, /* be16 */ - TCA_FLOWER_KEY_VLAN_PRIO, /* u8 */ - TCA_FLOWER_KEY_VLAN_ETH_TYPE, /* be16 */ -}; -#endif -/* - * For kernels < 4.2 BPF related enums may not be defined. - * Runtime checks will be carried out to gracefully report on TC messages that - * are rejected by the kernel. Rejection reasons may be due to: - * 1. enum is not defined - * 2. enum is defined but kernel is not configured to support BPF system calls, - * BPF classifications or BPF actions. - */ -#ifndef HAVE_TC_BPF -enum { - TCA_BPF_UNSPEC, - TCA_BPF_ACT, - TCA_BPF_POLICE, - TCA_BPF_CLASSID, - TCA_BPF_OPS_LEN, - TCA_BPF_OPS, -}; -#endif -#ifndef HAVE_TC_BPF_FD -enum { - TCA_BPF_FD = TCA_BPF_OPS + 1, - TCA_BPF_NAME, -}; -#endif -#ifndef HAVE_TC_ACT_BPF -#define tc_gen \ - __u32 index; \ - __u32 capab; \ - int action; \ - int refcnt; \ - int bindcnt - -struct tc_act_bpf { - tc_gen; -}; - -enum { - TCA_ACT_BPF_UNSPEC, - TCA_ACT_BPF_TM, - TCA_ACT_BPF_PARMS, - TCA_ACT_BPF_OPS_LEN, - TCA_ACT_BPF_OPS, -}; - -#endif -#ifndef HAVE_TC_ACT_BPF_FD -enum { - TCA_ACT_BPF_FD = TCA_ACT_BPF_OPS + 1, - TCA_ACT_BPF_NAME, -}; -#endif /* RSS key management */ enum bpf_rss_key_e { -- 2.43.0