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 9D90143A05; Tue, 30 Jan 2024 04:49:44 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 9FCA64067C; Tue, 30 Jan 2024 04:49:39 +0100 (CET) Received: from mail-pf1-f175.google.com (mail-pf1-f175.google.com [209.85.210.175]) by mails.dpdk.org (Postfix) with ESMTP id 5A05E40275 for ; Tue, 30 Jan 2024 04:49:37 +0100 (CET) Received: by mail-pf1-f175.google.com with SMTP id d2e1a72fcca58-6ddd19552e6so1663456b3a.1 for ; Mon, 29 Jan 2024 19:49:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1706586576; x=1707191376; 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=3DGxBwiriYLqKxUpC4uFoXlMxPcV00PWTEItbXsn7Ls=; b=DXqu64260CnkGzEuRZli+dF60IedaYdYIOVBQfPFJLLFAnptjI/qUKswOeIFhofKHU jN+6ZQZIK4Elb1lQuZP+dpbazRWKRml9Ge70+CX1u2eSY2ow1RLl6OnWxqTG+T2RN1fn qBJUXHto02vxtbfd8Ccttt+gjoEybZxjwJbKxeen92PrUH+5sO7ngUu/V1vCuA0oZoFr ZRRdW130LZq9PvUzrvYs71E92hSbNZbTd4Wk/Uk82aa4A+3IF+ouqXK+YAYyyo/7uuRg qnIPO2+nubEoBhntnZsc9z7rMR/WsjU+orx/rdW+82M0cpjaLEIYdp5gWxNccuuKtWII p3PA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706586576; x=1707191376; 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=3DGxBwiriYLqKxUpC4uFoXlMxPcV00PWTEItbXsn7Ls=; b=W1PODfKcV16XCKPxH2qaLW9Zw2iDlkQTKKrKvtL2l8XIwKlbndtX/dhdIzhmO93dKX l4zsPgH8EjXL+wEZf297DMm9LZc7Vd4rMShoeoBI9pVg96r4qFRlXkucAirffyuXMKoY xU4mmNpwBVaoEawKCzxzONnGlObM0V2PudxRyiIFC9HA28y3zWu2IgYV+ycB0TApS/2i pr9+yBQbFoYYE01wlB7sHwgSQm3ElhX7X8CC3bSsj7NJuOSFE2y2YMfpEx8U0lzIHCjd jxwBiSKNafgT38XGdI17OR2nUBLWTW3cWBj3GEVm2Kvee/q8yQgC7RolkCRmvJrUmWnd 7B6A== X-Gm-Message-State: AOJu0YxP1hkmJubCuzWq6NrLpVHRsiPySZF4/tTx3dRQKo7u1CqJ6lh4 V6vrOCJjoH+w+0OjqtfbYf2Z2Zu6lfteDY2Nf6q7+Qi+xlikSnPmtrGPMUk16LyRW5z86UyXek7 wbNE= X-Google-Smtp-Source: AGHT+IFmTCWaBs92+7EOYNdpfBNgH6sSwE/QJeoX/zRYS4gbS4wmHLptEebxMh3kG9yaW3Sp4TxHgw== X-Received: by 2002:a17:902:bcc5:b0:1d7:8816:a81f with SMTP id o5-20020a170902bcc500b001d78816a81fmr4663696pls.134.1706586576446; Mon, 29 Jan 2024 19:49:36 -0800 (PST) Received: from hermes.local (204-195-123-141.wavecable.com. [204.195.123.141]) by smtp.gmail.com with ESMTPSA id ix6-20020a170902f80600b001d77a0e1374sm6150672plb.151.2024.01.29.19.49.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jan 2024 19:49:36 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger Subject: [RFC 1/2] tap: stop "vendoring" linux bpf headers Date: Mon, 29 Jan 2024 19:46:51 -0800 Message-ID: <20240130034925.44869-2-stephen@networkplumber.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240130034925.44869-1-stephen@networkplumber.org> References: <20240130034925.44869-1-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 53fa76c4e6b0..88aec6885a06 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 ed4d42f92f9f..a5d38ee7c46c 100644 --- a/drivers/net/tap/tap_flow.c +++ b/drivers/net/tap/tap_flow.c @@ -18,95 +18,6 @@ #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