Commit 12675799 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: storvsc: Support hot add of scsi disks 



Support hot add of scsi disks.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 2b9525f5

drivers/staging/hv/storvsc_drv.c

+38 −0
Original line number Diff line number Diff line
@@ -304,6 +304,30 @@ struct storvsc_cmd_request { 
	struct hv_storvsc_request request;

};



struct storvsc_scan_work {

	struct work_struct work;

	struct Scsi_Host *host;

	uint lun;

};



static void storvsc_bus_scan(struct work_struct *work)

{

	struct storvsc_scan_work *wrk;

	int id, order_id;



	wrk = container_of(work, struct storvsc_scan_work, work);

	for (id = 0; id < wrk->host->max_id; ++id) {

		if (wrk->host->reverse_ordering)

			order_id = wrk->host->max_id - id - 1;

		else

			order_id = id;



		scsi_scan_target(&wrk->host->shost_gendev, 0,

				order_id, SCAN_WILD_CARD, 1);

	}

	kfree(wrk);

}



static inline struct storvsc_device *get_out_stor_device(

					struct hv_device *device)

{
@@ -551,11 +575,25 @@ static void storvsc_on_receive(struct hv_device *device, 
			     struct vstor_packet *vstor_packet,

			     struct hv_storvsc_request *request)

{

	struct storvsc_scan_work *work;

	struct storvsc_device *stor_device;



	switch (vstor_packet->operation) {

	case VSTOR_OPERATION_COMPLETE_IO:

		storvsc_on_io_completion(device, vstor_packet, request);

		break;



	case VSTOR_OPERATION_REMOVE_DEVICE:

	case VSTOR_OPERATION_ENUMERATE_BUS:

		stor_device = get_in_stor_device(device);

		work = kmalloc(sizeof(struct storvsc_scan_work), GFP_ATOMIC);

		if (!work)

			return;



		INIT_WORK(&work->work, storvsc_bus_scan);

		work->host = stor_device->host;

		schedule_work(&work->work);

		break;



	default:

		break;