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[SCSI] zfcp: Add zfcp private struct as SCSI device driver data 

Add a new data structure zfcp_scsi_dev that holds zfcp private data
for each SCSI device. Use scsi_transport_reserve_device to let the
SCSI midlayer automatically allocate this with each SCSI device.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt 2010-09-08 14:39:51 +02:00 committed by James Bottomley
parent d99e5f488a
commit 57c237731b
2 changed files with 42 additions and 0 deletions
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3
drivers/s390/scsi/zfcp_aux.c
View File

@ -159,6 +159,9 @@ static int __init zfcp_module_init(void)
fc_attach_transport(&zfcp_transport_functions);
if (!zfcp_data.scsi_transport_template)
goto out_transport;
scsi_transport_reserve_device(zfcp_data.scsi_transport_template,
sizeof(struct zfcp_scsi_dev));
retval = misc_register(&zfcp_cfdc_misc);
if (retval) {

39
drivers/s390/scsi/zfcp_def.h
View File

@ -233,6 +233,45 @@ struct zfcp_unit {
struct work_struct scsi_work;
};
/**
* struct zfcp_scsi_dev - zfcp data per SCSI device
* @status: zfcp internal status flags
* @lun_handle: handle from "open lun" for issuing FSF requests
* @erp_action: zfcp erp data for opening and recovering this LUN
* @erp_counter: zfcp erp counter for this LUN
* @latencies: FSF channel and fabric latencies
* @port: zfcp_port where this LUN belongs to
*/
struct zfcp_scsi_dev {
atomic_t status;
u32 lun_handle;
struct zfcp_erp_action erp_action;
atomic_t erp_counter;
struct zfcp_latencies latencies;
struct zfcp_port *port;
};
/**
* sdev_to_zfcp - Access zfcp LUN data for SCSI device
* @sdev: scsi_device where to get the zfcp_scsi_dev pointer
*/
static inline struct zfcp_scsi_dev *sdev_to_zfcp(struct scsi_device *sdev)
{
return scsi_transport_device_data(sdev);
}
/**
* zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN
* @sdev: SCSI device where to get the LUN from
*/
static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev)
{
u64 fcp_lun;
int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun);
return fcp_lun;
}
/**
* struct zfcp_fsf_req - basic FSF request structure
* @list: list of FSF requests