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storvsc: force SPC-3 compliance on win8 and win8 r2 hosts
On win8 and win8 r2 hosts force SPC-3 compliance for MSFT virtual disks. Ubuntu has been carrying a similar patch outside the tree for a while now. Starting with win10, the host will support SPC-3 compliance. Based on all the testing that has been done on win8 and win8 r2 hosts, we are comfortable claiming SPC-3 compliance on these hosts as well. This will enable TRIM support on these hosts. Suggested by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Long Li <longli@microsoft.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -1394,6 +1394,19 @@ static int storvsc_device_configure(struct scsi_device *sdevice)
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*/
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sdevice->sdev_bflags |= msft_blist_flags;
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/*
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* If the host is WIN8 or WIN8 R2, claim conformance to SPC-3
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* if the device is a MSFT virtual device.
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*/
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if (!strncmp(sdevice->vendor, "Msft", 4)) {
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switch (vmbus_proto_version) {
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case VERSION_WIN8:
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case VERSION_WIN8_1:
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sdevice->scsi_level = SCSI_SPC_3;
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break;
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}
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}
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return 0;
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}
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