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authorMartin K. Petersen <martin.petersen@oracle.com>2009-10-03 20:52:01 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-10-03 20:52:01 +0200
commitac481c20ef8f6c6f2be75d581863f40c43874ef7 (patch)
tree90512cadc1c9dea89c0a24149166d3ab464d065e /include
parent61f0c1dcaaac71faabac6ef7c839b29f20204bea (diff)
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block: Topology ioctls
Not all users of the topology information want to use libblkid. Provide the topology information through bdev ioctls. Also clarify sector size comments for existing BLK ioctls. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h35
-rw-r--r--include/linux/fs.h4
2 files changed, 34 insertions, 5 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a7323930d2ba..25119041e034 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1081,25 +1081,37 @@ static inline unsigned int queue_physical_block_size(struct request_queue *q)
return q->limits.physical_block_size;
}
+static inline int bdev_physical_block_size(struct block_device *bdev)
+{
+ return queue_physical_block_size(bdev_get_queue(bdev));
+}
+
static inline unsigned int queue_io_min(struct request_queue *q)
{
return q->limits.io_min;
}
+static inline int bdev_io_min(struct block_device *bdev)
+{
+ return queue_io_min(bdev_get_queue(bdev));
+}
+
static inline unsigned int queue_io_opt(struct request_queue *q)
{
return q->limits.io_opt;
}
+static inline int bdev_io_opt(struct block_device *bdev)
+{
+ return queue_io_opt(bdev_get_queue(bdev));
+}
+
static inline int queue_alignment_offset(struct request_queue *q)
{
- if (q && q->limits.misaligned)
+ if (q->limits.misaligned)
return -1;
- if (q && q->limits.alignment_offset)
- return q->limits.alignment_offset;
-
- return 0;
+ return q->limits.alignment_offset;
}
static inline int queue_sector_alignment_offset(struct request_queue *q,
@@ -1109,6 +1121,19 @@ static inline int queue_sector_alignment_offset(struct request_queue *q,
& (q->limits.io_min - 1);
}
+static inline int bdev_alignment_offset(struct block_device *bdev)
+{
+ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q->limits.misaligned)
+ return -1;
+
+ if (bdev != bdev->bd_contains)
+ return bdev->bd_part->alignment_offset;
+
+ return q->limits.alignment_offset;
+}
+
static inline int queue_dma_alignment(struct request_queue *q)
{
return q ? q->dma_alignment : 511;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2adaa2529f18..883eaacfd924 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -300,6 +300,10 @@ struct inodes_stat_t {
#define BLKTRACESTOP _IO(0x12,117)
#define BLKTRACETEARDOWN _IO(0x12,118)
#define BLKDISCARD _IO(0x12,119)
+#define BLKIOMIN _IO(0x12,120)
+#define BLKIOOPT _IO(0x12,121)
+#define BLKALIGNOFF _IO(0x12,122)
+#define BLKPBSZGET _IO(0x12,123)
#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
#define FIBMAP _IO(0x00,1) /* bmap access */