From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13434C4320A for ; Mon, 16 Aug 2021 10:51:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F031561C4F for ; Mon, 16 Aug 2021 10:51:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235955AbhHPKwO (ORCPT ); Mon, 16 Aug 2021 06:52:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236262AbhHPKwI (ORCPT ); Mon, 16 Aug 2021 06:52:08 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E1C9C0612A3; Mon, 16 Aug 2021 03:51:22 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id fa24-20020a17090af0d8b0290178bfa69d97so26922525pjb.0; Mon, 16 Aug 2021 03:51:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9WMFUZKDxMfxw44rjP6HLGPmcDMjc9RuKsGPbEWZGyw=; b=UYvfREnOKpTSNXzvJsw3rSEUTwd2nSeqxk9Ml+iR0byJuf/dtLx2+J7omAadkglGr9 Tco7kiolV+XZfj0pAAyvoWsXaAM47ev7lQfsq+LZzVzmtIh1j/Zpt2AVBF584CJVZbaM cnqaahavhCO2Bkbms+TMn9KKWb41Dj3cfhaA/vnB6SIGMnCTntgnK0iy2MEWX8dOvlJa 7840wvqBn8Yk8LvHgTSLq1BWt45tykhbLEr0XBPYXy8CaUWh315UYn7NMRLjatKn4DTq 1rFjnTP5FK5zUYQLhhPoWWo4ze4fx+d+O11VP5FUpbpYKcW5pMygyP7CtzXVttyp7bgL mdsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9WMFUZKDxMfxw44rjP6HLGPmcDMjc9RuKsGPbEWZGyw=; b=X1Z8cWhz3N+zjnzxQxdsVZrUaFRNs9bO4rUuEen7O/jeIJfdFB7N06fK4fR8qahlzP cUfTjBYN4RsC4GKcsc0CqMWjWxM9mnhqgKb1qYwKm9MGHJsP2JmoL3JOS7lZWMqbDHKm 0ylniKiDrMEZZJ1lNSCvPHisX5Ksv60bvB2pRLVFCZo1f88a9bXI3sqOl6m+NUhBrWZ1 6QoLkvGamUxiFoZa/5beVKoG0O20O0ZDUcHUbavZ0e8z8wnjPsVuwVirJoz6+EEIGKJl YbhFKqNkEH6XCqqtfUCCZj2cf6vvIsMCsVQS8gDONe+cSG8c0/LbGJmatjOyEFVAMWJj Ilrg== X-Gm-Message-State: AOAM533m8iF1nJuDJTXcNzaqHMKHJhz2D7kkdQTuwAyyLTub1ZeQfXwX Xl6ghK5jNAjMOiigTCgMClE= X-Google-Smtp-Source: ABdhPJxh9IxiulwybsKd7daCC5p/EXFlTi2+ojIXPXkMgDm59ZmdhFNetpiXBVISWMOClTuy3t9TaA== X-Received: by 2002:a17:90b:438e:: with SMTP id in14mr16714417pjb.66.1629111082059; Mon, 16 Aug 2021 03:51:22 -0700 (PDT) Received: from IRVINGLIU-MB0.tencent.com ([203.205.141.115]) by smtp.gmail.com with ESMTPSA id j13sm12685256pgp.29.2021.08.16.03.51.18 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 16 Aug 2021 03:51:21 -0700 (PDT) From: Xu Liu To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, Xu Liu Subject: [PATCH] bpf: Allow bpf_get_netns_cookie in BPF_PROG_TYPE_SOCK_OPS Date: Mon, 16 Aug 2021 18:51:14 +0800 Message-Id: <20210816105114.34781-1-liuxu623@gmail.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We'd like to be able to identify netns from sockops hooks to accelerate local process communication form different netns. Signed-off-by: Xu Liu --- net/core/filter.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index d70187ce851b..34938a537931 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4664,6 +4664,18 @@ static const struct bpf_func_proto bpf_get_netns_cookie_sock_addr_proto = { .arg1_type = ARG_PTR_TO_CTX_OR_NULL, }; +BPF_CALL_1(bpf_get_netns_cookie_sock_ops, struct bpf_sock_ops_kern *, ctx) +{ + return __bpf_get_netns_cookie(ctx ? ctx->sk : NULL); +} + +static const struct bpf_func_proto bpf_get_netns_cookie_sock_ops_proto = { + .func = bpf_get_netns_cookie_sock_ops, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_PTR_TO_CTX_OR_NULL, +}; + BPF_CALL_1(bpf_get_socket_uid, struct sk_buff *, skb) { struct sock *sk = sk_to_full_sk(skb->sk); @@ -7445,6 +7457,8 @@ sock_ops_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_sk_storage_get_proto; case BPF_FUNC_sk_storage_delete: return &bpf_sk_storage_delete_proto; + case BPF_FUNC_get_netns_cookie: + return &bpf_get_netns_cookie_sock_ops_proto; #ifdef CONFIG_INET case BPF_FUNC_load_hdr_opt: return &bpf_sock_ops_load_hdr_opt_proto; -- 2.28.0