This is a note to let you know that I've just added the patch titled
Drivers: hv: util: make struct hv_do_fcopy match Hyper-V host messages
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drivers-hv-util-make-struct-hv_do_fcopy-match-hyper-v-host-messages.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 31d4ea1a093fcf668d5f95af44b8d41488bdb7ec Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Date: Fri, 24 Oct 2014 12:20:27 +0200
Subject: Drivers: hv: util: make struct hv_do_fcopy match Hyper-V host messages
From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
commit 31d4ea1a093fcf668d5f95af44b8d41488bdb7ec upstream.
An attempt to fix fcopy on i586 (bc5a5b0 Drivers: hv: util: Properly pack the data
for file copy functionality) led to a regression on x86_64 (and actually didn't fix
i586 breakage). Fcopy messages from Hyper-V host come in the following format:
struct do_fcopy_hdr | 36 bytes
0000 | 4 bytes
offset | 8 bytes
size | 4 bytes
data | 6144 bytes
On x86_64 struct hv_do_fcopy matched this format without ' __attribute__((packed))'
and on i586 adding ' __attribute__((packed))' to it doesn't change anything. Keep
the structure packed and add padding to match re reality. Tested both i586 and x86_64
on Hyper-V Server 2012 R2.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/uapi/linux/hyperv.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/uapi/linux/hyperv.h
+++ b/include/uapi/linux/hyperv.h
@@ -134,6 +134,7 @@ struct hv_start_fcopy {
struct hv_do_fcopy {
struct hv_fcopy_hdr hdr;
+ __u32 pad;
__u64 offset;
__u32 size;
__u8 data[DATA_FRAGMENT];
Patches currently in stable-queue which might be from vkuznets@xxxxxxxxxx are
queue-3.18/drivers-hv-util-make-struct-hv_do_fcopy-match-hyper-v-host-messages.patch
queue-3.18/drivers-hv-vmbus-fix-a-race-condition-when-unregistering-a-device.patch
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