1 file changed, 23 insertions(+)
include/scsi/sd.h | 23 +++++++++++++++++++++++
HBA drivers need to poke in the CDB to prepare DIF commands. Provide
helpers for extracting {RD,WR}PROTECT and start LBA.
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
diff -r b512cd02f8b0 -r 5262eba570f4 include/scsi/sd.h
--- a/include/scsi/sd.h Fri Apr 25 17:39:29 2008 -0400
+++ b/include/scsi/sd.h Fri Apr 25 17:39:29 2008 -0400
@@ -1,5 +1,7 @@
#ifndef _SCSI_DISK_H
#define _SCSI_DISK_H
+
+#include <scsi/scsi_cmnd.h>
/*
* More than enough for everybody ;) The huge number of majors
@@ -61,4 +63,25 @@
(sdsk)->disk->disk_name, ##a) : \
sdev_printk(prefix, (sdsk)->device, fmt, ##a)
+static inline unsigned int sd_protect_field(struct scsi_cmnd *scmd)
+{
+ switch(scmd->cmnd[0]) {
+ case READ_10:
+ case READ_12:
+ case READ_16:
+ case WRITE_10:
+ case WRITE_12:
+ case WRITE_16:
+ return (scmd->cmnd[1] & 0xe0) >> 5;
+
+ default:
+ return -1;
+ }
+}
+
+static inline sector_t sd_start_lba(struct scsi_cmnd *scmd)
+{
+ return scmd->request->sector;
+}
+
#endif /* _SCSI_DISK_H */
--
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