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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 98626C433ED for ; Wed, 14 Apr 2021 16:04:54 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1F649611C9 for ; Wed, 14 Apr 2021 16:04:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1F649611C9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51110 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lWi0b-0001Uk-81 for qemu-devel@archiver.kernel.org; Wed, 14 Apr 2021 12:04:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34258) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWhoB-0007zU-1U for qemu-devel@nongnu.org; Wed, 14 Apr 2021 11:52:03 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:20782) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWho6-0000Lc-QM for qemu-devel@nongnu.org; Wed, 14 Apr 2021 11:52:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618415518; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ljfo4oko6rykN3ZDh9ZJHLBPXCNPDpGtckcWAS6rmbk=; b=Oxobo+ocIe/fcdm6GaAH4xYvvb99xFkfmBjsHp8i5fRTjNAXvzMGRWWauJEGeUulmry1BY HdMp0S2NMDGp/tHkqw7m/3oda6Os74Mq8xTtXKq53N/Oku445dL8mXu3ba747pLqgpoKTw wK5hNiiS1KT4CCgdizc28N1Jf36W6zg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-55-P2RoHpVjM4Gpc62dIthySA-1; Wed, 14 Apr 2021 11:51:56 -0400 X-MC-Unique: P2RoHpVjM4Gpc62dIthySA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 01A62802575 for ; Wed, 14 Apr 2021 15:51:55 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-115-158.ams2.redhat.com [10.36.115.158]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA5D3610A8; Wed, 14 Apr 2021 15:51:53 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, stefanha@redhat.com, vgoyal@redhat.com, virtio-fs@redhat.com Subject: [PATCH v2 09/25] DAX: virtio-fs: Fill in slave commands for mapping Date: Wed, 14 Apr 2021 16:51:21 +0100 Message-Id: <20210414155137.46522-10-dgilbert@redhat.com> In-Reply-To: <20210414155137.46522-1-dgilbert@redhat.com> References: <20210414155137.46522-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=dgilbert@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=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.23 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" From: "Dr. David Alan Gilbert" Fill in definitions for map, unmap and sync commands. Signed-off-by: Dr. David Alan Gilbert with fix by misono.tomohiro@fujitsu.com --- hw/virtio/vhost-user-fs.c | 117 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 113 insertions(+), 4 deletions(-) diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c index 169a146e72..963f694435 100644 --- a/hw/virtio/vhost-user-fs.c +++ b/hw/virtio/vhost-user-fs.c @@ -92,23 +92,132 @@ static bool check_slave_message_entries(const VhostUserFSSlaveMsg *sm, uint64_t vhost_user_fs_slave_map(struct vhost_dev *dev, int message_size, VhostUserFSSlaveMsg *sm, int fd) { + VHostUserFS *fs = (VHostUserFS *)object_dynamic_cast(OBJECT(dev->vdev), + TYPE_VHOST_USER_FS); + if (!fs) { + error_report("%s: Bad fs ptr", __func__); + return (uint64_t)-1; + } if (!check_slave_message_entries(sm, message_size)) { return (uint64_t)-1; } - /* TODO */ - return (uint64_t)-1; + size_t cache_size = fs->conf.cache_size; + if (!cache_size) { + error_report("map called when DAX cache not present"); + return (uint64_t)-1; + } + void *cache_host = memory_region_get_ram_ptr(&fs->cache); + + unsigned int i; + int res = 0; + + if (fd < 0) { + error_report("Bad fd for map"); + return (uint64_t)-1; + } + + for (i = 0; i < sm->count; i++) { + VhostUserFSSlaveMsgEntry *e = &sm->entries[i]; + if (e->len == 0) { + continue; + } + + if ((e->c_offset + e->len) < e->len || + (e->c_offset + e->len) > cache_size) { + error_report("Bad offset/len for map [%d] %" PRIx64 "+%" PRIx64, + i, e->c_offset, e->len); + res = -1; + break; + } + + if (mmap(cache_host + e->c_offset, e->len, + ((e->flags & VHOST_USER_FS_FLAG_MAP_R) ? PROT_READ : 0) | + ((e->flags & VHOST_USER_FS_FLAG_MAP_W) ? PROT_WRITE : 0), + MAP_SHARED | MAP_FIXED, + fd, e->fd_offset) != (cache_host + e->c_offset)) { + res = -errno; + error_report("map failed err %d [%d] %" PRIx64 "+%" PRIx64 " from %" + PRIx64, errno, i, e->c_offset, e->len, + e->fd_offset); + break; + } + } + + if (res) { + /* Something went wrong, unmap them all */ + vhost_user_fs_slave_unmap(dev, message_size, sm); + } + return (uint64_t)res; } uint64_t vhost_user_fs_slave_unmap(struct vhost_dev *dev, int message_size, VhostUserFSSlaveMsg *sm) { + VHostUserFS *fs = (VHostUserFS *)object_dynamic_cast(OBJECT(dev->vdev), + TYPE_VHOST_USER_FS); + if (!fs) { + error_report("%s: Bad fs ptr", __func__); + return (uint64_t)-1; + } if (!check_slave_message_entries(sm, message_size)) { return (uint64_t)-1; } - /* TODO */ - return (uint64_t)-1; + size_t cache_size = fs->conf.cache_size; + if (!cache_size) { + /* + * Since dax cache is disabled, there should be no unmap request. + * Howerver we still receives whole range unmap request during umount + * for cleanup. Ignore it. + */ + if (sm->entries[0].len == ~(uint64_t)0) { + return 0; + } + + error_report("unmap called when DAX cache not present"); + return (uint64_t)-1; + } + void *cache_host = memory_region_get_ram_ptr(&fs->cache); + + unsigned int i; + int res = 0; + + /* + * Note even if one unmap fails we try the rest, since the effect + * is to clean up as much as possible. + */ + for (i = 0; i < sm->count; i++) { + VhostUserFSSlaveMsgEntry *e = &sm->entries[i]; + void *ptr; + if (e->len == 0) { + continue; + } + + if (e->len == ~(uint64_t)0) { + /* Special case meaning the whole arena */ + e->len = cache_size; + } + + if ((e->c_offset + e->len) < e->len || + (e->c_offset + e->len) > cache_size) { + error_report("Bad offset/len for unmap [%d] %" PRIx64 "+%" PRIx64, + i, e->c_offset, e->len); + res = -1; + continue; + } + + ptr = mmap(cache_host + e->c_offset, e->len, DAX_WINDOW_PROT, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); + if (ptr != (cache_host + e->c_offset)) { + res = -errno; + error_report("mmap failed (%s) [%d] %" PRIx64 "+%" PRIx64 " from %" + PRIx64 " res: %p", strerror(errno), i, e->c_offset, + e->len, e->fd_offset, ptr); + } + } + + return (uint64_t)res; } static void vuf_get_config(VirtIODevice *vdev, uint8_t *config) -- 2.31.1