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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/compat_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/compat_ioctl.c')
| -rw-r--r-- | block/compat_ioctl.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index 7865a34e0faa..9bd086c1a4d5 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -21,6 +21,11 @@ static int compat_put_int(unsigned long arg, int val) return put_user(val, (compat_int_t __user *)compat_ptr(arg)); } +static int compat_put_uint(unsigned long arg, unsigned int val) +{ + return put_user(val, (compat_uint_t __user *)compat_ptr(arg)); +} + static int compat_put_long(unsigned long arg, long val) { return put_user(val, (compat_long_t __user *)compat_ptr(arg)); @@ -734,6 +739,14 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) switch (cmd) { case HDIO_GETGEO: return compat_hdio_getgeo(disk, bdev, compat_ptr(arg)); + case BLKPBSZGET: + return compat_put_uint(arg, bdev_physical_block_size(bdev)); + case BLKIOMIN: + return compat_put_uint(arg, bdev_io_min(bdev)); + case BLKIOOPT: + return compat_put_uint(arg, bdev_io_opt(bdev)); + case BLKALIGNOFF: + return compat_put_int(arg, bdev_alignment_offset(bdev)); case BLKFLSBUF: case BLKROSET: case BLKDISCARD: |