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| author | Hannes Reinecke <hare@suse.de> | 2015-12-01 12:16:55 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-12-03 00:40:19 +0300 |
| commit | 9983bed3907c379d1d30b7509bb0a871ed655f9d (patch) | |
| tree | b9b437dc4baaf07b3ced70ea0eaceee855022795 /include | |
| parent | e2d817db32027c25a1702f667fbf0bf6a73fc68c (diff) | |
| download | linux-9983bed3907c379d1d30b7509bb0a871ed655f9d.tar.xz | |
scsi: Add scsi_vpd_lun_id()
Add a function scsi_vpd_lun_id() to return a unique device
identifcation based on the designation descriptors of
VPD page 0x83.
As devices might implement several descriptors the order
of preference is:
- NAA IEE Registered Extended
- EUI-64 based 16-byte
- EUI-64 based 12-byte
- NAA IEEE Registered
- NAA IEEE Extended
A SCSI name string descriptor is preferred to all of them
if the identification is longer than 16 bytes.
The returned unique device identification will be formatted
as a SCSI Name string to avoid clashes between different
designator types.
[mkp: Fixed up kernel doc comment from Johannes]
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_device.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index bde4077f2864..4c49cfa25cac 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -415,6 +415,7 @@ static inline int scsi_execute_req(struct scsi_device *sdev, } extern void sdev_disable_disk_events(struct scsi_device *sdev); extern void sdev_enable_disk_events(struct scsi_device *sdev); +extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t); #ifdef CONFIG_PM extern int scsi_autopm_get_device(struct scsi_device *); |