From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D79BC34252B for ; Fri, 3 Jul 2026 05:41:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783057305; cv=none; b=HjE0aC8to9xTUeeNBOn1n19kevdcv6QUOJALFbmwz8z9ynh36mdgd3rTkthT0LkQiLtw7EkyyngsxAf751ZoXxMyDGzjU+EBzBOone4VPciPvU4QCmwnBQRr8b0wVbw0xtrvMFX3srcV87345fkdWxmRG+s+ip0iQLSW79oBDTc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783057305; c=relaxed/simple; bh=h+fQ99qrEfGvjKV0AR3JOEG4em0edW4iby5ipZEoibM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lRRnNbbJv/P/AYQQv+WlAdvPmwt9F+Wm7AEqpLc6B99mN4nXkMm7VPRGgDDlt5DZC2boAq8hfo+gFbFNAfvy+7Uq+i7CF2f121J4skrMcYN3N3TrHpoUZIXTRi0tC7+fJ+gzGnPWpGoH/pxPARoAxLykjg8u3qHb4VFw79wY6mM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JSPR15w4; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JSPR15w4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783057301; 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=OLp7JBppxrQNeK2bkAKu3qTx9JCltO+cf9OJPQmO7Is=; b=JSPR15w4k089YVMMvqAdopdpGG4uK4PWwtpUoa2bWHDI6AYTetrYzzKBEFv6XBN9vIsm2N aujtVWXgYQkZDUsyaPSYHogETBEGXMZKs5fY/bqZ+ZGwRIydymTz3v+Do9oHkw0dYIGgJm QzN8IcovZxzlizm5H9mfdnHs3D6blyE= Received: from mx-prod-mc-03.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-93-DBZLwBiUNoCms8btFa7OAQ-1; Fri, 03 Jul 2026 01:41:38 -0400 X-MC-Unique: DBZLwBiUNoCms8btFa7OAQ-1 X-Mimecast-MFC-AGG-ID: DBZLwBiUNoCms8btFa7OAQ_1783057297 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 57B3B193E8B1; Fri, 3 Jul 2026 05:41:36 +0000 (UTC) Received: from localhost (unknown [10.2.16.24]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AD2EE1800592; Fri, 3 Jul 2026 05:41:34 +0000 (UTC) Date: Fri, 3 Jul 2026 07:41:33 +0200 From: Stefan Hajnoczi To: skvarlamatus@gmail.com Cc: ericvh@kernel.org, lucho@ionkov.net, asmadeus@codewreck.org, linux_oss@crudebyte.com, v9fs@lists.linux.dev, linux-kernel@vger.kernel.org, sgarzare@redhat.com Subject: Re: [PATCH v2] net/9p: add vsock transport Message-ID: <20260703054133.GB448934@fedora> References: <20260701155922.95502-1-skvarlamatus@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="7+83Ftc4nKYQpn3M" Content-Disposition: inline In-Reply-To: <20260701155922.95502-1-skvarlamatus@gmail.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 --7+83Ftc4nKYQpn3M Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 01, 2026 at 05:59:22PM +0200, skvarlamatus@gmail.com wrote: > From: Matus Skvarla >=20 > Add vsock as a transport option for 9P client connections. This > allows mounting 9P filesystems over VM sockets without requiring TCP/IP > networking or additional userspace tools. >=20 > The implementation extends trans_fd.c with vsock support, reusing the > existing socket infrastructure. A new p9_fd_create_vsock() function > handles vsock connection setup by parsing the CID from the mount source, > creating an AF_VSOCK socket, and connecting to the specified endpoint. > All other transport operations (close, request, cancel) use the shared > fd transport implementation. >=20 > The privport mount option is not currently supported for vsock and > returns -EOPNOTSUPP if specified. >=20 > Add CONFIG_NET_9P_VSOCK option that conditionally compiles vsock support > into 9pnet_fd.ko. This follows the pattern where socket-based transports > (TCP, Unix, vsock) share trans_fd.c, while specialized hardware transports > (virtio, xen, rdma) have dedicated files. >=20 > Usage: > mount -t 9p -o trans=3Dvsock[,port=3D] /mnt/point >=20 > Signed-off-by: Matus Skvarla > --- > Changes in v2: > - Add depends on NET_9P_FD to Kconfig > - Use #include > - Reject privport option with -EOPNOTSUPP > - Use fc->net_ns instead of current->nsproxy->net_ns > - Widen vsock port to u32 to match sockaddr_vm.svm_port > - Widen p9_fd_opts.port to u32 and port_str buffer accordingly (in p9_f= d_create_tcp()) > - Add vsock to Documentation/filesystems/9p.rst > Link to v1: https://lore.kernel.org/v9fs/20260527073447.86538-1-skvarlama= tus@gmail.com/ > --- > Documentation/filesystems/9p.rst | 12 +++- > include/net/9p/client.h | 10 +++- > net/9p/Kconfig | 10 ++++ > net/9p/trans_fd.c | 97 +++++++++++++++++++++++++++++++- > 4 files changed, 124 insertions(+), 5 deletions(-) >=20 > diff --git a/Documentation/filesystems/9p.rst b/Documentation/filesystems= /9p.rst > index 3f65db648db0..d1bac30b3c9d 100644 > --- a/Documentation/filesystems/9p.rst > +++ b/Documentation/filesystems/9p.rst > @@ -50,6 +50,14 @@ mount points. Each 9P export is seen by the client as = a virtio device with an > associated "mount_tag" property. Available mount tags can be > seen by reading /sys/bus/virtio/drivers/9pnet_virtio/virtio/mount_tag= files. > =20 > +For server accessible over vsock (VM sockets):: > + > + mount -t 9p -o trans=3Dvsock /mnt/9 If you respin this patch, please add the port=3D option because it is absent from this example and it could be missed if one doesn't read the paragraph below carefully: mount -t 9p -o trans=3Dvsock[,port=3D] /mnt/9 Other than that: Reviewed-by: Stefan Hajnoczi --7+83Ftc4nKYQpn3M Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmpHS40ACgkQnKSrs4Gr c8jW4wf/RNJsWNQHO3OkT+F6Ic6uLAOH3Kh05rIv0UnodXFsTyK1MfqOiYOedI01 I2tAhOU3DB3sW13b78tlOB22FCc2sN5l9UMQB58UkdrKJIPX5JaTdzwosuMASIRo t0k7ctM2TETGhIqn0FwxsFs5dUXmdQJDkRjXqfbL/udVhr+OiBn6faT7bxwO/PLH fjtEVDT8No++IF1Fyw+cXXjHCD/az/jshxdyOs8Lih8W835vNO8SFLVlXgEZRQ1Z qJwjjNLxrOAOfCdbpMUu5VkyNBPnTGh8qVxBVdvJrV6HM/RbL/5aDc0GkO8Rz18C xknZPlvBRQSHcKaLyg6PP8TVbJVS/A== =R738 -----END PGP SIGNATURE----- --7+83Ftc4nKYQpn3M--