On Thu, Mar 28, 2024 at 04:39:02PM -0400, Stefan Hajnoczi wrote: > The SEEK_HOLE/SEEK_DATA interface is used by userspace applications to > detect sparseness. This makes copying and backup applications faster and > reduces space consumption because only ranges that do not contain data > can be skipped.
s/only // > > Handle SEEK_HOLE/SEEK_DATA for block devices. No block drivers implement > the new callback yet so the entire block device will appear to contain > data. Later patches will add support to drivers so this actually becomes > useful. > > Signed-off-by: Stefan Hajnoczi <[email protected]> > --- > include/linux/blkdev.h | 7 +++++++ > block/fops.c | 43 +++++++++++++++++++++++++++++++++++++++++- > 2 files changed, 49 insertions(+), 1 deletion(-) > -- Eric Blake, Principal Software Engineer Red Hat, Inc. Virtualization: qemu.org | libguestfs.org
