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Mon, 27 Feb 2023 10:53:49 -0500 X-MC-Unique: inavr7DaPlSPxeWPDMSTeg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 70F14185A7A4; Mon, 27 Feb 2023 15:53:48 +0000 (UTC) Received: from localhost (unknown [10.39.193.71]) by smtp.corp.redhat.com (Postfix) with ESMTP id 348811121314; Mon, 27 Feb 2023 15:53:47 +0000 (UTC) Date: Mon, 27 Feb 2023 10:53:45 -0500 From: Stefan Hajnoczi To: vgoyal@redhat.com Subject: Re: [RESEND v2 PATCH] init/do_mounts.c: add virtiofs root fs support Message-ID: References: <20230224143751.36863-1-david@ixit.cz> MIME-Version: 1.0 In-Reply-To: <20230224143751.36863-1-david@ixit.cz> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Cc: David Heidelberg , Miklos Szeredi , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, wsa+renesas@sang-engineering.com, helen.koike@collabora.com, Al Viro , linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0454353283792758785==" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" --===============0454353283792758785== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="RSf3QCTu5WhPlQBP" Content-Disposition: inline --RSf3QCTu5WhPlQBP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 24, 2023 at 03:37:51PM +0100, David Heidelberg wrote: > From: Stefan Hajnoczi >=20 > Make it possible to boot directly from a virtiofs file system with tag > 'myfs' using the following kernel parameters: >=20 > rootfstype=3Dvirtiofs root=3Dmyfs rw >=20 > Booting directly from virtiofs makes it possible to use a directory on > the host as the root file system. This is convenient for testing and > situations where manipulating disk image files is cumbersome. >=20 > Reviewed-by: Helen Koike > Signed-off-by: Stefan Hajnoczi > Signed-off-by: David Heidelberg > --- > v2: added Reviewed-by and CCed everyone interested. >=20 > We have used this option in Mesa3D CI for testing crosvm for > more than one years and it's proven to work reliably. >=20 > We are working on effort to removing custom patches to be able to do=20 > automated apply and test of patches from any tree. = =20 >=20 > https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/.gitlab-ci/crosvm-ru= nner.sh#L85 > init/do_mounts.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) Vivek, do you remember where we ended up with boot from virtiofs? I thought a different solution was merged some time ago. There is documentation from the virtiofs community here: https://virtio-fs.gitlab.io/howto-boot.html Stefan >=20 > diff --git a/init/do_mounts.c b/init/do_mounts.c > index 811e94daf0a8..11c11abe23d7 100644 > --- a/init/do_mounts.c > +++ b/init/do_mounts.c > @@ -578,6 +578,16 @@ void __init mount_root(void) > printk(KERN_ERR "VFS: Unable to mount root fs via SMB.\n"); > return; > } > +#endif > +#ifdef CONFIG_VIRTIO_FS > + if (root_fs_names && !strcmp(root_fs_names, "virtiofs")) { > + if (!do_mount_root(root_device_name, "virtiofs", > + root_mountflags, root_mount_data)) > + return; > + > + panic("VFS: Unable to mount root fs \"%s\" from virtiofs", > + root_device_name); > + } > #endif > if (ROOT_DEV =3D=3D 0 && root_device_name && root_fs_names) { > if (mount_nodev_root() =3D=3D 0) > --=20 > 2.39.1 >=20 --RSf3QCTu5WhPlQBP Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmP80gkACgkQnKSrs4Gr c8gQDAf/S5FKAUxYW0RXBL8p7kqYdskcOGTgDOV7axCS6K87pK4tYT7M3RqheN3+ edcQhwOIM1ycR+xuYS5AA60sUtNKlsF4RIZu8+ug1sJPoXZE2WDtQbMk4sCpctgt oWQTTVA35jvOv8SnfVL6AYcYTtymB6bpXaX/cYdUn5ERaOleKRvt4E8Rpjv9hCjS 2pg+KhGCoTWLicimXqEmHZI4FwChxJgvmw8EmNmyNm9wzuh9xibsLbm0tB6wyIdt f7FWURT1T+yIr8TIChaWUg7pb+HldwDxpcFSsLeZGgaPB22os24ZTalYNrd8KQrm 320U02Kiol90+QZLWEVXkJQ1z2HlmA== =igqY -----END PGP SIGNATURE----- --RSf3QCTu5WhPlQBP-- --===============0454353283792758785== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization --===============0454353283792758785==-- 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 4CDE5C64ED8 for ; Mon, 27 Feb 2023 15:53:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8FE1E10E055; Mon, 27 Feb 2023 15:53:57 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id ADE3210E055 for ; 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Mon, 27 Feb 2023 15:53:48 +0000 (UTC) Received: from localhost (unknown [10.39.193.71]) by smtp.corp.redhat.com (Postfix) with ESMTP id 348811121314; Mon, 27 Feb 2023 15:53:47 +0000 (UTC) Date: Mon, 27 Feb 2023 10:53:45 -0500 From: Stefan Hajnoczi To: vgoyal@redhat.com Subject: Re: [RESEND v2 PATCH] init/do_mounts.c: add virtiofs root fs support Message-ID: References: <20230224143751.36863-1-david@ixit.cz> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="RSf3QCTu5WhPlQBP" Content-Disposition: inline In-Reply-To: <20230224143751.36863-1-david@ixit.cz> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Heidelberg , Miklos Szeredi , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, wsa+renesas@sang-engineering.com, helen.koike@collabora.com, Al Viro , linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --RSf3QCTu5WhPlQBP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 24, 2023 at 03:37:51PM +0100, David Heidelberg wrote: > From: Stefan Hajnoczi >=20 > Make it possible to boot directly from a virtiofs file system with tag > 'myfs' using the following kernel parameters: >=20 > rootfstype=3Dvirtiofs root=3Dmyfs rw >=20 > Booting directly from virtiofs makes it possible to use a directory on > the host as the root file system. This is convenient for testing and > situations where manipulating disk image files is cumbersome. >=20 > Reviewed-by: Helen Koike > Signed-off-by: Stefan Hajnoczi > Signed-off-by: David Heidelberg > --- > v2: added Reviewed-by and CCed everyone interested. >=20 > We have used this option in Mesa3D CI for testing crosvm for > more than one years and it's proven to work reliably. >=20 > We are working on effort to removing custom patches to be able to do=20 > automated apply and test of patches from any tree. = =20 >=20 > https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/.gitlab-ci/crosvm-ru= nner.sh#L85 > init/do_mounts.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) Vivek, do you remember where we ended up with boot from virtiofs? I thought a different solution was merged some time ago. There is documentation from the virtiofs community here: https://virtio-fs.gitlab.io/howto-boot.html Stefan >=20 > diff --git a/init/do_mounts.c b/init/do_mounts.c > index 811e94daf0a8..11c11abe23d7 100644 > --- a/init/do_mounts.c > +++ b/init/do_mounts.c > @@ -578,6 +578,16 @@ void __init mount_root(void) > printk(KERN_ERR "VFS: Unable to mount root fs via SMB.\n"); > return; > } > +#endif > +#ifdef CONFIG_VIRTIO_FS > + if (root_fs_names && !strcmp(root_fs_names, "virtiofs")) { > + if (!do_mount_root(root_device_name, "virtiofs", > + root_mountflags, root_mount_data)) > + return; > + > + panic("VFS: Unable to mount root fs \"%s\" from virtiofs", > + root_device_name); > + } > #endif > if (ROOT_DEV =3D=3D 0 && root_device_name && root_fs_names) { > if (mount_nodev_root() =3D=3D 0) > --=20 > 2.39.1 >=20 --RSf3QCTu5WhPlQBP Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmP80gkACgkQnKSrs4Gr c8gQDAf/S5FKAUxYW0RXBL8p7kqYdskcOGTgDOV7axCS6K87pK4tYT7M3RqheN3+ edcQhwOIM1ycR+xuYS5AA60sUtNKlsF4RIZu8+ug1sJPoXZE2WDtQbMk4sCpctgt oWQTTVA35jvOv8SnfVL6AYcYTtymB6bpXaX/cYdUn5ERaOleKRvt4E8Rpjv9hCjS 2pg+KhGCoTWLicimXqEmHZI4FwChxJgvmw8EmNmyNm9wzuh9xibsLbm0tB6wyIdt f7FWURT1T+yIr8TIChaWUg7pb+HldwDxpcFSsLeZGgaPB22os24ZTalYNrd8KQrm 320U02Kiol90+QZLWEVXkJQ1z2HlmA== =igqY -----END PGP SIGNATURE----- --RSf3QCTu5WhPlQBP-- 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E401C64ED6 for ; Mon, 27 Feb 2023 15:54:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229815AbjB0Pyp (ORCPT ); Mon, 27 Feb 2023 10:54:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229893AbjB0Pyo (ORCPT ); Mon, 27 Feb 2023 10:54:44 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 755D116ADA for ; Mon, 27 Feb 2023 07:53:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1677513232; 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: in-reply-to:in-reply-to:references:references; bh=FSg5+r6je78Oo6DOHt1spvGdIu0PScSllKZjUp4heJA=; b=KZ/7agVI/jwe0IRgbSdkf0oYeZgrYvfXh0bs8d7kVk0Da9q0c3dn0274MgXm5PNzsl8V3Q ahJf+27OeU7bfTWKM96IKWRZAKZJYNJkGXiJeATeCTOBiFch9Icwq4bB5JKiBmTFnyZlCj gA9kgS1y00Im/+IYkagAZP2iLYKtJl8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-416-inavr7DaPlSPxeWPDMSTeg-1; Mon, 27 Feb 2023 10:53:49 -0500 X-MC-Unique: inavr7DaPlSPxeWPDMSTeg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 70F14185A7A4; Mon, 27 Feb 2023 15:53:48 +0000 (UTC) Received: from localhost (unknown [10.39.193.71]) by smtp.corp.redhat.com (Postfix) with ESMTP id 348811121314; Mon, 27 Feb 2023 15:53:47 +0000 (UTC) Date: Mon, 27 Feb 2023 10:53:45 -0500 From: Stefan Hajnoczi To: vgoyal@redhat.com Cc: dri-devel@lists.freedesktop.org, helen.koike@collabora.com, Al Viro , Miklos Szeredi , virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, wsa+renesas@sang-engineering.com, akpm@linux-foundation.org, David Heidelberg Subject: Re: [RESEND v2 PATCH] init/do_mounts.c: add virtiofs root fs support Message-ID: References: <20230224143751.36863-1-david@ixit.cz> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="RSf3QCTu5WhPlQBP" Content-Disposition: inline In-Reply-To: <20230224143751.36863-1-david@ixit.cz> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org --RSf3QCTu5WhPlQBP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 24, 2023 at 03:37:51PM +0100, David Heidelberg wrote: > From: Stefan Hajnoczi >=20 > Make it possible to boot directly from a virtiofs file system with tag > 'myfs' using the following kernel parameters: >=20 > rootfstype=3Dvirtiofs root=3Dmyfs rw >=20 > Booting directly from virtiofs makes it possible to use a directory on > the host as the root file system. This is convenient for testing and > situations where manipulating disk image files is cumbersome. >=20 > Reviewed-by: Helen Koike > Signed-off-by: Stefan Hajnoczi > Signed-off-by: David Heidelberg > --- > v2: added Reviewed-by and CCed everyone interested. >=20 > We have used this option in Mesa3D CI for testing crosvm for > more than one years and it's proven to work reliably. >=20 > We are working on effort to removing custom patches to be able to do=20 > automated apply and test of patches from any tree. = =20 >=20 > https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/.gitlab-ci/crosvm-ru= nner.sh#L85 > init/do_mounts.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) Vivek, do you remember where we ended up with boot from virtiofs? I thought a different solution was merged some time ago. There is documentation from the virtiofs community here: https://virtio-fs.gitlab.io/howto-boot.html Stefan >=20 > diff --git a/init/do_mounts.c b/init/do_mounts.c > index 811e94daf0a8..11c11abe23d7 100644 > --- a/init/do_mounts.c > +++ b/init/do_mounts.c > @@ -578,6 +578,16 @@ void __init mount_root(void) > printk(KERN_ERR "VFS: Unable to mount root fs via SMB.\n"); > return; > } > +#endif > +#ifdef CONFIG_VIRTIO_FS > + if (root_fs_names && !strcmp(root_fs_names, "virtiofs")) { > + if (!do_mount_root(root_device_name, "virtiofs", > + root_mountflags, root_mount_data)) > + return; > + > + panic("VFS: Unable to mount root fs \"%s\" from virtiofs", > + root_device_name); > + } > #endif > if (ROOT_DEV =3D=3D 0 && root_device_name && root_fs_names) { > if (mount_nodev_root() =3D=3D 0) > --=20 > 2.39.1 >=20 --RSf3QCTu5WhPlQBP Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmP80gkACgkQnKSrs4Gr c8gQDAf/S5FKAUxYW0RXBL8p7kqYdskcOGTgDOV7axCS6K87pK4tYT7M3RqheN3+ edcQhwOIM1ycR+xuYS5AA60sUtNKlsF4RIZu8+ug1sJPoXZE2WDtQbMk4sCpctgt oWQTTVA35jvOv8SnfVL6AYcYTtymB6bpXaX/cYdUn5ERaOleKRvt4E8Rpjv9hCjS 2pg+KhGCoTWLicimXqEmHZI4FwChxJgvmw8EmNmyNm9wzuh9xibsLbm0tB6wyIdt f7FWURT1T+yIr8TIChaWUg7pb+HldwDxpcFSsLeZGgaPB22os24ZTalYNrd8KQrm 320U02Kiol90+QZLWEVXkJQ1z2HlmA== =igqY -----END PGP SIGNATURE----- --RSf3QCTu5WhPlQBP--