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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1D74C433EF for ; Thu, 21 Oct 2021 12:38:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFF85611CE for ; Thu, 21 Oct 2021 12:38:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231530AbhJUMkk (ORCPT ); Thu, 21 Oct 2021 08:40:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:27424 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231230AbhJUMk1 (ORCPT ); Thu, 21 Oct 2021 08:40:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634819891; 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=FxSLK+HAlyV2x9DBqilIGmaJn0wdCYP5yKFxkCOkl5Q=; b=N73q2BV7TEWAq43O/GhOHDRwWpGwd6BVDWHUhMV4nFXVzkczI4hhFQpl1e579t7q+qOpQx rKHZjFaUfp9cMUFB/KpIcD9SgsVBZD2nAp3rnKREchjkPd0EjDBxjBIlf55ETpIaNCwcKQ H8LSA0997/JVrNN7lQN0jdR8Ao/uSLk= 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-21-PNWplLLrOx2LDJXN3Fa1kg-1; Thu, 21 Oct 2021 08:38:08 -0400 X-MC-Unique: PNWplLLrOx2LDJXN3Fa1kg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4FC848066EF; Thu, 21 Oct 2021 12:38:07 +0000 (UTC) Received: from localhost (unknown [10.39.208.31]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2081B5B826; Thu, 21 Oct 2021 12:38:05 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, sgarzare@redhat.com, davem@davemloft.net, kuba@kernel.org, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH 08/10] vhost/vsock: save owner pid & creds Date: Thu, 21 Oct 2021 16:37:12 +0400 Message-Id: <20211021123714.1125384-9-marcandre.lureau@redhat.com> In-Reply-To: <20211021123714.1125384-1-marcandre.lureau@redhat.com> References: <20211021123714.1125384-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After VHOST_SET_OWNER success, save the owner process credentials. Signed-off-by: Marc-André Lureau --- drivers/vhost/vsock.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index 938aefbc75ec..3067436cddfc 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -58,6 +58,8 @@ struct vhost_vsock { u32 guest_cid; bool seqpacket_allow; + struct pid *owner_pid; + const struct cred *owner_cred; }; static u32 vhost_transport_get_local_cid(void) @@ -774,6 +776,10 @@ static int vhost_vsock_dev_release(struct inode *inode, struct file *file) vhost_dev_cleanup(&vsock->dev); kfree(vsock->dev.vqs); + + put_pid(vsock->owner_pid); + put_cred(vsock->owner_cred); + vhost_vsock_free(vsock); return 0; } @@ -851,6 +857,22 @@ static int vhost_vsock_set_features(struct vhost_vsock *vsock, u64 features) return -EFAULT; } +static long vhost_vsock_set_owner(struct vhost_vsock *vsock) +{ + long r; + + mutex_lock(&vsock->dev.mutex); + r = vhost_dev_set_owner(&vsock->dev); + if (r) + goto out; + vsock->owner_pid = get_pid(task_tgid(current)); + vsock->owner_cred = get_current_cred(); + vhost_vsock_flush(vsock); +out: + mutex_unlock(&vsock->dev.mutex); + return r; +} + static long vhost_vsock_dev_ioctl(struct file *f, unsigned int ioctl, unsigned long arg) { @@ -894,6 +916,8 @@ static long vhost_vsock_dev_ioctl(struct file *f, unsigned int ioctl, return -EOPNOTSUPP; vhost_set_backend_features(&vsock->dev, features); return 0; + case VHOST_SET_OWNER: + return vhost_vsock_set_owner(vsock); default: mutex_lock(&vsock->dev.mutex); r = vhost_dev_ioctl(&vsock->dev, ioctl, argp); -- 2.33.0.721.g106298f7f9