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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 340F6C54E58 for ; Tue, 12 Mar 2024 11:38:16 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rk0SJ-0007t9-Of; Tue, 12 Mar 2024 07:38:03 -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 1rk0RT-0007Hb-7x for qemu-devel@nongnu.org; Tue, 12 Mar 2024 07:37:12 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rk0RN-0003CF-E3 for qemu-devel@nongnu.org; Tue, 12 Mar 2024 07:37:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710243423; 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=lOzZD5K3ohqJcqqHaijgOwCK5zWpnxlLBidHTyMp7OQ=; b=H903NfJbGJTUhCL8XFnPDh1BGiQdxpULWaWS03CeB2E9Pvfg/r+jJkruNfCR8wCo+ctgPO EggSzqb05AAHPRKSRuuSSlS4XwpKEQgtZie+eHxbSfjmaq2c3TXy8b5lUP816zyN2GSFIj zbSSXhWrDKTzEbrlFI8xFM3HlBLvJ/Y= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-246-2N1pnWCkP8iMshUPhhvOnQ-1; Tue, 12 Mar 2024 07:37:00 -0400 X-MC-Unique: 2N1pnWCkP8iMshUPhhvOnQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id A07223C0DD05; Tue, 12 Mar 2024 11:36:59 +0000 (UTC) Received: from localhost.localdomain (unknown [10.72.112.61]) by smtp.corp.redhat.com (Postfix) with ESMTP id C1AE9492BC7; Tue, 12 Mar 2024 11:36:57 +0000 (UTC) From: Jason Wang To: qemu-devel@nongnu.org, peter.maydell@linaro.org Cc: Andrew Melnychenko , Jason Wang Subject: [PULL 5/8] ebpf: Added eBPF initialization by fds. Date: Tue, 12 Mar 2024 19:36:39 +0800 Message-ID: <20240312113642.36862-6-jasowang@redhat.com> In-Reply-To: <20240312113642.36862-1-jasowang@redhat.com> References: <20240312113642.36862-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.687, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Andrew Melnychenko It allows using file descriptors of eBPF provided outside of QEMU. QEMU may be run without capabilities for eBPF and run RSS program provided by management tool(g.e. libvirt). Signed-off-by: Andrew Melnychenko Signed-off-by: Jason Wang --- ebpf/ebpf_rss-stub.c | 6 ++++++ ebpf/ebpf_rss.c | 27 +++++++++++++++++++++++++++ ebpf/ebpf_rss.h | 5 +++++ 3 files changed, 38 insertions(+) diff --git a/ebpf/ebpf_rss-stub.c b/ebpf/ebpf_rss-stub.c index e71e229190..8d7fae2ad9 100644 --- a/ebpf/ebpf_rss-stub.c +++ b/ebpf/ebpf_rss-stub.c @@ -28,6 +28,12 @@ bool ebpf_rss_load(struct EBPFRSSContext *ctx) return false; } +bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd, + int config_fd, int toeplitz_fd, int table_fd) +{ + return false; +} + bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config, uint16_t *indirections_table, uint8_t *toeplitz_key) { diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c index f774d9636b..150aa40813 100644 --- a/ebpf/ebpf_rss.c +++ b/ebpf/ebpf_rss.c @@ -146,6 +146,33 @@ error: return false; } +bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd, + int config_fd, int toeplitz_fd, int table_fd) +{ + if (ebpf_rss_is_loaded(ctx)) { + return false; + } + + if (program_fd < 0 || config_fd < 0 || toeplitz_fd < 0 || table_fd < 0) { + return false; + } + + ctx->program_fd = program_fd; + ctx->map_configuration = config_fd; + ctx->map_toeplitz_key = toeplitz_fd; + ctx->map_indirections_table = table_fd; + + if (!ebpf_rss_mmap(ctx)) { + ctx->program_fd = -1; + ctx->map_configuration = -1; + ctx->map_toeplitz_key = -1; + ctx->map_indirections_table = -1; + return false; + } + + return true; +} + static bool ebpf_rss_set_config(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config) { diff --git a/ebpf/ebpf_rss.h b/ebpf/ebpf_rss.h index ab08a7266d..239242b0d2 100644 --- a/ebpf/ebpf_rss.h +++ b/ebpf/ebpf_rss.h @@ -14,6 +14,8 @@ #ifndef QEMU_EBPF_RSS_H #define QEMU_EBPF_RSS_H +#define EBPF_RSS_MAX_FDS 4 + struct EBPFRSSContext { void *obj; int program_fd; @@ -41,6 +43,9 @@ bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx); bool ebpf_rss_load(struct EBPFRSSContext *ctx); +bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd, + int config_fd, int toeplitz_fd, int table_fd); + bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config, uint16_t *indirections_table, uint8_t *toeplitz_key); -- 2.42.0