From nobody Sat Nov 23 22:01:08 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1729673565; cv=none; d=zohomail.com; s=zohoarc; b=njelfy+l+U8CJbcZAzMUWVDH6raMpBxwf4+nxI95ikQh8+yyV33fUN9kpPwRAe6VB+43RhGmpr4xbVxLCBHIypqP7EIToFxgFqPxTEVTVvLbOTtR5M40+/c+oeO+1vtP5SlVwchRFJJtOVkaMwl8nKpOy9HW63zUE7WmI8oxBJo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1729673565; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=kG/EDr2i6N99N/lyixLAYWZhnmRTOBjYTzh2WT/Wqk0=; b=gio+WoVFAfKitqe3shoGjgd340UJvv+8kNsJqwGFJ0+HRw7nawEftBOb+3BN79sCuelbL4yo48iDpKGMAexU2OiAYC6+//KP0cwV/7yrB7ZWO6WpZFQyDFWHOsq1XIxoGP8L4HMm+O616Vr0JvGemBtzUN4ZE38fAljM/b1wL7k= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1729673565590398.38430533566543; Wed, 23 Oct 2024 01:52:45 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t3X5U-0000Zh-8j; Wed, 23 Oct 2024 04:51:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t3X5R-0000YA-VU for qemu-devel@nongnu.org; Wed, 23 Oct 2024 04:51:26 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t3X5Q-0007tl-GM for qemu-devel@nongnu.org; Wed, 23 Oct 2024 04:51:25 -0400 Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-77-hkgWxFaKMfW3ks89UY8ETA-1; Wed, 23 Oct 2024 04:51:20 -0400 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 71CCE1955D45; Wed, 23 Oct 2024 08:51:19 +0000 (UTC) Received: from toolbox.redhat.com (unknown [10.42.28.19]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0EEE31955EA3; Wed, 23 Oct 2024 08:51:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729673483; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kG/EDr2i6N99N/lyixLAYWZhnmRTOBjYTzh2WT/Wqk0=; b=KzUwHKEd1gwggxekAWT+iH06mdx1ED02ZeNIeBAeA3vUXgTf40wR/4S2kA8+HgL5+HgW+T fnjkGxtxlc8dBFM33JH6IzHevApAljay1TaPbmermUI9CBAaxzATEyfc5MeF6+2300aTLX 892fkebTxBOcw3MX91waaUTdrg+SKOE= X-MC-Unique: hkgWxFaKMfW3ks89UY8ETA-1 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Yuri Benditovich , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Paolo Bonzini , Andrew Melnychenko , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Jason Wang Subject: [PATCH v3 3/8] ebpf: drop redundant parameter checks in static methods Date: Wed, 23 Oct 2024 09:50:58 +0100 Message-ID: <20241023085103.1980072-4-berrange@redhat.com> In-Reply-To: <20241023085103.1980072-1-berrange@redhat.com> References: <20241023085103.1980072-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.519, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1.697, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1729673566278116600 Various static methods have checks on their parameters which were already checked immediately before the method was invoked. Drop these redundat checks to simplify the following commit which adds formal error reporting. Signed-off-by: Daniel P. Berrang=C3=A9 --- ebpf/ebpf_rss.c | 32 +++++--------------------------- 1 file changed, 5 insertions(+), 27 deletions(-) diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c index dcaa80f380..0c42355a93 100644 --- a/ebpf/ebpf_rss.c +++ b/ebpf/ebpf_rss.c @@ -49,10 +49,6 @@ bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx) =20 static bool ebpf_rss_mmap(struct EBPFRSSContext *ctx) { - if (!ebpf_rss_is_loaded(ctx)) { - return false; - } - ctx->mmap_configuration =3D mmap(NULL, qemu_real_host_page_size(), PROT_READ | PROT_WRITE, MAP_SHARED, ctx->map_configuration, 0); @@ -90,10 +86,6 @@ toeplitz_fail: =20 static void ebpf_rss_munmap(struct EBPFRSSContext *ctx) { - if (!ebpf_rss_is_loaded(ctx)) { - return; - } - munmap(ctx->mmap_indirections_table, qemu_real_host_page_size()); munmap(ctx->mmap_toeplitz_key, qemu_real_host_page_size()); munmap(ctx->mmap_configuration, qemu_real_host_page_size()); @@ -177,15 +169,10 @@ bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, in= t program_fd, return true; } =20 -static bool ebpf_rss_set_config(struct EBPFRSSContext *ctx, +static void ebpf_rss_set_config(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config) { - if (!ebpf_rss_is_loaded(ctx)) { - return false; - } - memcpy(ctx->mmap_configuration, config, sizeof(*config)); - return true; } =20 static bool ebpf_rss_set_indirections_table(struct EBPFRSSContext *ctx, @@ -194,8 +181,7 @@ static bool ebpf_rss_set_indirections_table(struct EBPF= RSSContext *ctx, { char *cursor =3D ctx->mmap_indirections_table; =20 - if (!ebpf_rss_is_loaded(ctx) || indirections_table =3D=3D NULL || - len > VIRTIO_NET_RSS_MAX_TABLE_LEN) { + if (len > VIRTIO_NET_RSS_MAX_TABLE_LEN) { return false; } =20 @@ -207,20 +193,16 @@ static bool ebpf_rss_set_indirections_table(struct EB= PFRSSContext *ctx, return true; } =20 -static bool ebpf_rss_set_toepliz_key(struct EBPFRSSContext *ctx, +static void ebpf_rss_set_toepliz_key(struct EBPFRSSContext *ctx, uint8_t *toeplitz_key) { /* prepare toeplitz key */ uint8_t toe[VIRTIO_NET_RSS_MAX_KEY_SIZE] =3D {}; =20 - if (!ebpf_rss_is_loaded(ctx) || toeplitz_key =3D=3D NULL) { - return false; - } memcpy(toe, toeplitz_key, VIRTIO_NET_RSS_MAX_KEY_SIZE); *(uint32_t *)toe =3D ntohl(*(uint32_t *)toe); =20 memcpy(ctx->mmap_toeplitz_key, toe, VIRTIO_NET_RSS_MAX_KEY_SIZE); - return true; } =20 bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *co= nfig, @@ -231,18 +213,14 @@ bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, str= uct EBPFRSSConfig *config, return false; } =20 - if (!ebpf_rss_set_config(ctx, config)) { - return false; - } + ebpf_rss_set_config(ctx, config); =20 if (!ebpf_rss_set_indirections_table(ctx, indirections_table, config->indirections_len)) { return false; } =20 - if (!ebpf_rss_set_toepliz_key(ctx, toeplitz_key)) { - return false; - } + ebpf_rss_set_toepliz_key(ctx, toeplitz_key); =20 return true; } --=20 2.46.0