From nobody Sun Feb 8 14:35:30 2026 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=1619608632; cv=none; d=zohomail.com; s=zohoarc; b=Q8ghVmFx+IjXK8xRaN12bu1M6QDv1xRZ2bck+WxRSuJxPlYe4TBR3Q5ph0p/qWlP1Yj/g9b/pkdvP05gR9iAzOVZ2uzItD82tqzv8K9G2HxqM+prmJ/1WrvfzntAoDpGzOG5POKwnozUAChZoYash3j3xPEkpiSidoRww6CeA/Y= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1619608632; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=G++lmgtRMv1IQycGaq/ZJfotO/vv+K2FzBzV9IK5cIU=; b=DuWawBTDc//5SJuu28y+wIIruPkvbmLA8wN5CjvRWwIFyIUpKQakCDI/pflcFKIvJdQQRKXKwzBUt7z/WPDFdRYjAZ04QQsBWir/9PXpqjrMMzP7kroyDSoSvuA2/o5mC6SS47Qh/LYwwBOwUG4+WUqXiL8ENxdPUanAQ9DNxOM= 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) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1619608632927822.710036734475; Wed, 28 Apr 2021 04:17:12 -0700 (PDT) Received: from localhost ([::1]:39176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lbiBr-00054e-T7 for importer@patchew.org; Wed, 28 Apr 2021 07:17:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36162) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lbhx8-0006OQ-V0 for qemu-devel@nongnu.org; Wed, 28 Apr 2021 07:01:58 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:45157) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lbhx6-00055V-TQ for qemu-devel@nongnu.org; Wed, 28 Apr 2021 07:01:58 -0400 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-77-ac4HQT_QOdurnp87V7je2Q-1; Wed, 28 Apr 2021 07:01:52 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AAA8A100A605; Wed, 28 Apr 2021 11:01:51 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-115-35.ams2.redhat.com [10.36.115.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F765100AE4E; Wed, 28 Apr 2021 11:01:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1619607715; 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=G++lmgtRMv1IQycGaq/ZJfotO/vv+K2FzBzV9IK5cIU=; b=HhUo+PsKNI2tvtEXQCQC0X9wjQeVZYZ6mLrIhLI8+RRDdFv71ZjgtA1Og5RlcGP5iYrGC2 0r8v+zhoCGKPj1Kj9lTG1/ZgOg13h5Ax8xytxX/dr6O0VJhJ1De29yJ9JNAhJBhPjrQJaJ preTAtYrprt6YUNF3yQerWePZEr/Rhs= X-MC-Unique: ac4HQT_QOdurnp87V7je2Q-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, vgoyal@redhat.com, stefanha@redhat.com, groug@kaod.org Subject: [PATCH v3 12/26] DAX: virtiofsd: Add setup/remove mappings fuse commands Date: Wed, 28 Apr 2021 12:00:46 +0100 Message-Id: <20210428110100.27757-13-dgilbert@redhat.com> In-Reply-To: <20210428110100.27757-1-dgilbert@redhat.com> References: <20210428110100.27757-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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: quoted-printable 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=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.22, 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: , Cc: virtio-fs@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" Add commands so that the guest kernel can ask the daemon to map file sections into a guest kernel visible cache. Note: Catherine Ho had sent a patch to fix an issue with multiple removemapping. It was a merge issue though. Signed-off-by: Dr. David Alan Gilbert Signed-off-by: Vivek Goyal Signed-off-by: Peng Tao Including-fixes: Catherine Ho Signed-off-by: Catherine Ho Reviewed-by: Stefan Hajnoczi --- tools/virtiofsd/fuse_lowlevel.c | 69 +++++++++++++++++++++++++++++++++ tools/virtiofsd/fuse_lowlevel.h | 23 ++++++++++- 2 files changed, 91 insertions(+), 1 deletion(-) diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowleve= l.c index 58e32fc963..a1a8730b73 100644 --- a/tools/virtiofsd/fuse_lowlevel.c +++ b/tools/virtiofsd/fuse_lowlevel.c @@ -1870,6 +1870,73 @@ static void do_lseek(fuse_req_t req, fuse_ino_t node= id, } } =20 +static void do_setupmapping(fuse_req_t req, fuse_ino_t nodeid, + struct fuse_mbuf_iter *iter) +{ + struct fuse_setupmapping_in *arg; + struct fuse_file_info fi; + + arg =3D fuse_mbuf_iter_advance(iter, sizeof(*arg)); + if (!arg) { + fuse_reply_err(req, EINVAL); + return; + } + + memset(&fi, 0, sizeof(fi)); + fi.fh =3D arg->fh; + + /* + * TODO: Need to come up with a better definition of flags here; it c= an't + * be the kernel view of the flags, since that's abstracted from the c= lient + * similarly, it's not the vhost-user set + * for now just use O_ flags + */ + uint64_t genflags; + + genflags =3D O_RDONLY; + if (arg->flags & FUSE_SETUPMAPPING_FLAG_WRITE) { + genflags =3D O_RDWR; + } + + if (req->se->op.setupmapping) { + req->se->op.setupmapping(req, nodeid, arg->foffset, arg->len, + arg->moffset, genflags, &fi); + } else { + fuse_reply_err(req, ENOSYS); + } +} + +static void do_removemapping(fuse_req_t req, fuse_ino_t nodeid, + struct fuse_mbuf_iter *iter) +{ + struct fuse_removemapping_in *arg; + struct fuse_removemapping_one *one; + + arg =3D fuse_mbuf_iter_advance(iter, sizeof(*arg)); + if (!arg || !arg->count || + (uint64_t)arg->count * sizeof(*one) >=3D SIZE_MAX) { + fuse_log(FUSE_LOG_ERR, "do_removemapping: invalid arg %p\n", arg); + fuse_reply_err(req, EINVAL); + return; + } + + one =3D fuse_mbuf_iter_advance(iter, arg->count * sizeof(*one)); + if (!one) { + fuse_log( + FUSE_LOG_ERR, + "do_removemapping: invalid in, expected %d * %zd, has %zd - %z= d\n", + arg->count, sizeof(*one), iter->size, iter->pos); + fuse_reply_err(req, EINVAL); + return; + } + + if (req->se->op.removemapping) { + req->se->op.removemapping(req, req->se, nodeid, arg->count, one); + } else { + fuse_reply_err(req, ENOSYS); + } +} + static void do_init(fuse_req_t req, fuse_ino_t nodeid, struct fuse_mbuf_iter *iter) { @@ -2267,6 +2334,8 @@ static struct { [FUSE_RENAME2] =3D { do_rename2, "RENAME2" }, [FUSE_COPY_FILE_RANGE] =3D { do_copy_file_range, "COPY_FILE_RANGE" }, [FUSE_LSEEK] =3D { do_lseek, "LSEEK" }, + [FUSE_SETUPMAPPING] =3D { do_setupmapping, "SETUPMAPPING" }, + [FUSE_REMOVEMAPPING] =3D { do_removemapping, "REMOVEMAPPING" }, }; =20 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0])) diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowleve= l.h index 3383e3a8a0..0bf206264d 100644 --- a/tools/virtiofsd/fuse_lowlevel.h +++ b/tools/virtiofsd/fuse_lowlevel.h @@ -24,6 +24,7 @@ #endif =20 #include "fuse_common.h" +#include "standard-headers/linux/fuse.h" =20 #include #include @@ -1171,7 +1172,6 @@ struct fuse_lowlevel_ops { */ void (*readdirplus)(fuse_req_t req, fuse_ino_t ino, size_t size, off_t= off, struct fuse_file_info *fi); - /** * Copy a range of data from one file to another * @@ -1227,6 +1227,27 @@ struct fuse_lowlevel_ops { */ void (*lseek)(fuse_req_t req, fuse_ino_t ino, off_t off, int whence, struct fuse_file_info *fi); + + /* + * Map file sections into kernel visible cache + * + * Map a section of the file into address space visible to the kernel + * mounting the filesystem. + * TODO + */ + void (*setupmapping)(fuse_req_t req, fuse_ino_t ino, uint64_t foffset, + uint64_t len, uint64_t moffset, uint64_t flags, + struct fuse_file_info *fi); + + /* + * Unmap file sections in kernel visible cache + * + * Unmap sections previously mapped by setupmapping + * TODO + */ + void (*removemapping)(fuse_req_t req, struct fuse_session *se, + fuse_ino_t ino, unsigned num, + struct fuse_removemapping_one *argp); }; =20 /** --=20 2.31.1