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Drivers: hv: util: make struct hv_do_fcopy match Hyper-V host messages
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@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -134,6 +134,7 @@ struct hv_start_fcopy {
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struct hv_do_fcopy {
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struct hv_fcopy_hdr hdr;
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__u32 pad;
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__u64 offset;
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__u32 size;
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__u8 data[DATA_FRAGMENT];
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