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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2009-10-03 20:52:01 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-10-03 20:52:01 +0200 |
| commit | ac481c20ef8f6c6f2be75d581863f40c43874ef7 (patch) | |
| tree | 90512cadc1c9dea89c0a24149166d3ab464d065e /block/ioctl.c | |
| parent | 61f0c1dcaaac71faabac6ef7c839b29f20204bea (diff) | |
| download | lwn-ac481c20ef8f6c6f2be75d581863f40c43874ef7.tar.gz lwn-ac481c20ef8f6c6f2be75d581863f40c43874ef7.zip | |
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 'block/ioctl.c')
| -rw-r--r-- | block/ioctl.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index d3e6b5827a34..1f4d1de12b09 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -138,6 +138,11 @@ static int put_int(unsigned long arg, int val) return put_user(val, (int __user *)arg); } +static int put_uint(unsigned long arg, unsigned int val) +{ + return put_user(val, (unsigned int __user *)arg); +} + static int put_long(unsigned long arg, long val) { return put_user(val, (long __user *)arg); @@ -263,10 +268,18 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, return put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); case BLKROGET: return put_int(arg, bdev_read_only(bdev) != 0); - case BLKBSZGET: /* get the logical block size (cf. BLKSSZGET) */ + case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */ return put_int(arg, block_size(bdev)); - case BLKSSZGET: /* get block device hardware sector size */ + case BLKSSZGET: /* get block device logical block size */ return put_int(arg, bdev_logical_block_size(bdev)); + case BLKPBSZGET: /* get block device physical block size */ + return put_uint(arg, bdev_physical_block_size(bdev)); + case BLKIOMIN: + return put_uint(arg, bdev_io_min(bdev)); + case BLKIOOPT: + return put_uint(arg, bdev_io_opt(bdev)); + case BLKALIGNOFF: + return put_int(arg, bdev_alignment_offset(bdev)); case BLKSECTGET: return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev))); case BLKRASET: |