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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-08-11 15:58:42 +0100
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:02 +0200
commitd30a2605be9d5132d95944916e8f578fcfe4f976 (patch)
tree91a8161cb09536ab838ef47fceabb0da0bea9256 /block/compat_ioctl.c
parent2ebca85abcfcbaaf1c0b242e39fc88ad3da90090 (diff)
downloadlinux-stericsson-d30a2605be9d5132d95944916e8f578fcfe4f976.tar.gz
Add BLKDISCARD ioctl to allow userspace to discard sectors
We may well want mkfs tools to use this to mark the whole device as unwanted before they format it, for example. The ioctl takes a pair of uint64_ts, which are start offset and length in _bytes_. Although at the moment it might make sense for them both to be in 512-byte sectors, I don't want to limit the ABI to that. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/compat_ioctl.c')
-rw-r--r--block/compat_ioctl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index c23177e4623f..1e559fba7bdf 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -788,6 +788,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
case BLKFLSBUF:
case BLKROSET:
+ case BLKDISCARD:
/*
* the ones below are implemented in blkdev_locked_ioctl,
* but we call blkdev_ioctl, which gets the lock for us