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scsi: storvsc: Retrieve information about the capability of the target 

The storage protocol informs the guest of the I/O capabilities of the storage
stack. Retrieve this information and use it in the guest.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
K. Y. Srinivasan 2015-03-27 00:27:17 -07:00 committed by James Bottomley
parent 0147dabc44
commit 5117b93696
1 changed files with 6 additions and 0 deletions
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6
drivers/scsi/storvsc_drv.c
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@ -377,6 +377,10 @@ struct storvsc_device {
unsigned char path_id; unsigned char path_id;
unsigned char target_id; unsigned char target_id;
/*
* Max I/O, the device can support.
*/
u32 max_transfer_bytes;
/* Used for vsc/vsp channel reset process */ /* Used for vsc/vsp channel reset process */
struct storvsc_cmd_request init_request; struct storvsc_cmd_request init_request;
struct storvsc_cmd_request reset_request; struct storvsc_cmd_request reset_request;
@ -974,6 +978,8 @@ static int storvsc_channel_init(struct hv_device *device)
STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL) STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL)
process_sub_channels = true; process_sub_channels = true;
} }
stor_device->max_transfer_bytes =
vstor_packet->storage_channel_properties.max_transfer_bytes;
memset(vstor_packet, 0, sizeof(struct vstor_packet)); memset(vstor_packet, 0, sizeof(struct vstor_packet));
vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION; vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION;