[PATCH v2 1/5] scsi: core: Add helper to return number of logical blocks in a request

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Cc: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
 include/scsi/scsi_cmnd.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 90da9617d28a..804b2b33da4a 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -232,6 +232,13 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
 	return blk_rq_pos(scmd->request) >> shift;
 }
 
+static inline unsigned int scsi_logical_block_count(struct scsi_cmnd *scmd)
+{
+	unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT;
+
+	return blk_rq_bytes(scmd->request) >> shift;
+}
+
 /*
  * The operations below are hints that tell the controller driver how
  * to handle I/Os with DIF or similar types of protection information.
-- 
2.32.0




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