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-rw-r--r--kernel/drivers/scsi/sd.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/drivers/scsi/sd.h b/kernel/drivers/scsi/sd.h
index 5f2a84aff..765a6f1ac 100644
--- a/kernel/drivers/scsi/sd.h
+++ b/kernel/drivers/scsi/sd.h
@@ -65,7 +65,7 @@ struct scsi_disk {
struct device dev;
struct gendisk *disk;
atomic_t openers;
- sector_t capacity; /* size in 512-byte sectors */
+ sector_t capacity; /* size in logical blocks */
u32 max_xfer_blocks;
u32 opt_xfer_blocks;
u32 max_ws_blocks;
@@ -146,6 +146,16 @@ static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)
return 0;
}
+static inline sector_t logical_to_sectors(struct scsi_device *sdev, sector_t blocks)
+{
+ return blocks << (ilog2(sdev->sector_size) - 9);
+}
+
+static inline unsigned int logical_to_bytes(struct scsi_device *sdev, sector_t blocks)
+{
+ return blocks * sdev->sector_size;
+}
+
/*
* A DIF-capable target device can be formatted with different
* protection schemes. Currently 0 through 3 are defined: