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block: Do away with the notion of hardsect_size

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Until now we have had a 1:1 mapping between storage device physical
block size and the logical block sized used when addressing the device.
With SATA 4KB drives coming out that will no longer be the case.  The
sector size will be 4KB but the logical block size will remain
512-bytes.  Hence we need to distinguish between the physical block size
and the logical ditto.

This patch renames hardsect_size to logical_block_size.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Martin K. Petersen
2009-05-22 17:17:49 -04:00
committed by Jens Axboe
parent 9bd7de51ee
commit e1defc4ff0
54 changed files with 108 additions and 98 deletions
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14
include/linux/blkdev.h
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@@ -391,7 +391,7 @@ struct request_queue
unsigned int max_hw_sectors;
unsigned short max_phys_segments;
unsigned short max_hw_segments;
unsigned short hardsect_size;
unsigned short logical_block_size;
unsigned int max_segment_size;
unsigned long seg_boundary_mask;
@@ -901,7 +901,7 @@ extern void blk_queue_max_sectors(struct request_queue *, unsigned int);
extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
extern void blk_queue_hardsect_size(struct request_queue *, unsigned short);
extern void blk_queue_logical_block_size(struct request_queue *, unsigned short);
extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
extern void blk_queue_dma_pad(struct request_queue *, unsigned int);
extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int);
@@ -988,19 +988,19 @@ extern void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter);
#define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist)
static inline int queue_hardsect_size(struct request_queue *q)
static inline unsigned short queue_logical_block_size(struct request_queue *q)
{
int retval = 512;
if (q && q->hardsect_size)
retval = q->hardsect_size;
if (q && q->logical_block_size)
retval = q->logical_block_size;
return retval;
}
static inline int bdev_hardsect_size(struct block_device *bdev)
static inline unsigned short bdev_logical_block_size(struct block_device *bdev)
{
return queue_hardsect_size(bdev_get_queue(bdev));
return queue_logical_block_size(bdev_get_queue(bdev));
}
static inline int queue_dma_alignment(struct request_queue *q)