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[SCSI] scsi_dh: Implement match callback function

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Some device handler types are not tied to the vendor/model
but rather to a specific capability. Eg ALUA is supported
if the 'TPGS' setting in the standard inquiry is set.
This patch implements a 'match' callback for device handler
which supersedes the original vendor/model lookup and
implements the callback for the ALUA handler.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Hannes Reinecke
2011-08-24 10:51:15 +02:00
committed by James Bottomley
parent 2a9ab40f74
commit 6c3633d08a
3 changed files with 52 additions and 25 deletions
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include/scsi/scsi_device.h
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@@ -197,6 +197,7 @@ struct scsi_device_handler {
int (*activate)(struct scsi_device *, activate_complete, void *);
int (*prep_fn)(struct scsi_device *, struct request *);
int (*set_params)(struct scsi_device *, const char *);
bool (*match)(struct scsi_device *);
};
struct scsi_dh_data {