9b53592daf
* Mon Jun 29 2020 Fedora Kernel Team <kernel-team@fedoraproject.org> [5.8.0-0.rc3.1] - v5.8-rc3 rebase - s390x-zfcpdump: Handle missing Module.symvers file (Don Zickus) - Updated changelog for the release based on 8be3a53e18e0 (Fedora Kernel Team) Resolves: rhbz# Signed-off-by: Augusto Caringi <acaringi@redhat.com>
124 lines
5.2 KiB
Diff
124 lines
5.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Tue, 19 May 2020 12:21:30 +0200
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Subject: [PATCH] virt: vbox: Fix VBGL_IOCTL_VMMDEV_REQUEST_BIG and _LOG req
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numbers to match upstream
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Until this commit the mainline kernel version (this version) of the
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vboxguest module contained a bug where it defined
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VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG using
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_IOC(_IOC_READ | _IOC_WRITE, 'V', ...) instead of
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_IO(V, ...) as the out of tree VirtualBox upstream version does.
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Since the VirtualBox userspace bits are always built against VirtualBox
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upstream's headers, this means that so far the mainline kernel version
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of the vboxguest module has been failing these 2 ioctls with -ENOTTY.
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I guess that VBGL_IOCTL_VMMDEV_REQUEST_BIG is never used causing us to
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not hit that one and sofar the vboxguest driver has failed to actually
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log any log messages passed it through VBGL_IOCTL_LOG.
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This commit changes the VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG
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defines to match the out of tree VirtualBox upstream vboxguest version,
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while keeping compatibility with the old wrong request defines so as
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to not break the kernel ABI in case someone has been using the old
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request defines.
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Fixes: f6ddd094f579 ("virt: Add vboxguest driver for Virtual Box Guest integration UAPI")
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Cc: stable@vger.kernel.org
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Upstream Status: https://lore.kernel.org/lkml/20200520195440.38759-1-hdegoede@redhat.com/
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---
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drivers/virt/vboxguest/vboxguest_core.c | 4 +++-
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drivers/virt/vboxguest/vboxguest_core.h | 15 +++++++++++++++
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drivers/virt/vboxguest/vboxguest_linux.c | 3 ++-
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include/uapi/linux/vboxguest.h | 4 ++--
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4 files changed, 22 insertions(+), 4 deletions(-)
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diff --git a/drivers/virt/vboxguest/vboxguest_core.c b/drivers/virt/vboxguest/vboxguest_core.c
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index b690a8a4bf9e..8fab04e76c14 100644
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--- a/drivers/virt/vboxguest/vboxguest_core.c
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+++ b/drivers/virt/vboxguest/vboxguest_core.c
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@@ -1520,7 +1520,8 @@ int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
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/* For VMMDEV_REQUEST hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT */
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if (req_no_size == VBG_IOCTL_VMMDEV_REQUEST(0) ||
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- req == VBG_IOCTL_VMMDEV_REQUEST_BIG)
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+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG ||
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+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG_ALT)
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return vbg_ioctl_vmmrequest(gdev, session, data);
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if (hdr->type != VBG_IOCTL_HDR_TYPE_DEFAULT)
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@@ -1558,6 +1559,7 @@ int vbg_core_ioctl(struct vbg_session *session, unsigned int req, void *data)
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case VBG_IOCTL_HGCM_CALL(0):
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return vbg_ioctl_hgcm_call(gdev, session, f32bit, data);
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case VBG_IOCTL_LOG(0):
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+ case VBG_IOCTL_LOG_ALT(0):
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return vbg_ioctl_log(data);
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}
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diff --git a/drivers/virt/vboxguest/vboxguest_core.h b/drivers/virt/vboxguest/vboxguest_core.h
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index 4188c12b839f..77c3a9c8255d 100644
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--- a/drivers/virt/vboxguest/vboxguest_core.h
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+++ b/drivers/virt/vboxguest/vboxguest_core.h
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@@ -15,6 +15,21 @@
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#include <linux/vboxguest.h>
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#include "vmmdev.h"
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+/*
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+ * The mainline kernel version (this version) of the vboxguest module
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+ * contained a bug where it defined VBGL_IOCTL_VMMDEV_REQUEST_BIG and
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+ * VBGL_IOCTL_LOG using _IOC(_IOC_READ | _IOC_WRITE, 'V', ...) instead
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+ * of _IO(V, ...) as the out of tree VirtualBox upstream version does.
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+ *
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+ * These _ALT definitions keep compatibility with the wrong defines the
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+ * mainline kernel version used for a while.
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+ * Note the VirtualBox userspace bits have always been built against
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+ * VirtualBox upstream's headers, so this is likely not necessary. But
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+ * we must never break our ABI so we keep these around to be 100% sure.
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+ */
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+#define VBG_IOCTL_VMMDEV_REQUEST_BIG_ALT _IOC(_IOC_READ | _IOC_WRITE, 'V', 3, 0)
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+#define VBG_IOCTL_LOG_ALT(s) _IOC(_IOC_READ | _IOC_WRITE, 'V', 9, s)
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+
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struct vbg_session;
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/** VBox guest memory balloon. */
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diff --git a/drivers/virt/vboxguest/vboxguest_linux.c b/drivers/virt/vboxguest/vboxguest_linux.c
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index 6e8c0f1c1056..32c2c52f7e84 100644
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--- a/drivers/virt/vboxguest/vboxguest_linux.c
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+++ b/drivers/virt/vboxguest/vboxguest_linux.c
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@@ -131,7 +131,8 @@ static long vbg_misc_device_ioctl(struct file *filp, unsigned int req,
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* the need for a bounce-buffer and another copy later on.
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*/
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is_vmmdev_req = (req & ~IOCSIZE_MASK) == VBG_IOCTL_VMMDEV_REQUEST(0) ||
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- req == VBG_IOCTL_VMMDEV_REQUEST_BIG;
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+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG ||
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+ req == VBG_IOCTL_VMMDEV_REQUEST_BIG_ALT;
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if (is_vmmdev_req)
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buf = vbg_req_alloc(size, VBG_IOCTL_HDR_TYPE_DEFAULT,
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diff --git a/include/uapi/linux/vboxguest.h b/include/uapi/linux/vboxguest.h
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index 9cec58a6a5ea..f79d7abe27db 100644
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--- a/include/uapi/linux/vboxguest.h
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+++ b/include/uapi/linux/vboxguest.h
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@@ -103,7 +103,7 @@ VMMDEV_ASSERT_SIZE(vbg_ioctl_driver_version_info, 24 + 20);
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/* IOCTL to perform a VMM Device request larger then 1KB. */
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-#define VBG_IOCTL_VMMDEV_REQUEST_BIG _IOC(_IOC_READ | _IOC_WRITE, 'V', 3, 0)
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+#define VBG_IOCTL_VMMDEV_REQUEST_BIG _IO('V', 3)
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/** VBG_IOCTL_HGCM_CONNECT data structure. */
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@@ -198,7 +198,7 @@ struct vbg_ioctl_log {
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} u;
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};
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-#define VBG_IOCTL_LOG(s) _IOC(_IOC_READ | _IOC_WRITE, 'V', 9, s)
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+#define VBG_IOCTL_LOG(s) _IO('V', 9)
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/** VBG_IOCTL_WAIT_FOR_EVENTS data structure. */
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--
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2.25.4
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