On Tue, Apr 12, 2016 at 12:42:46PM -0400, Brian Foster wrote: > From: Mike Snitzer <[email protected]> > > [BF: > - Killed wrapper functions. > - Condensed to single bdev op.] > > Signed-off-by: Mike Snitzer <[email protected]> > --- > include/linux/blkdev.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > index 669e419..6c6ea96 100644 > --- a/include/linux/blkdev.h > +++ b/include/linux/blkdev.h > @@ -1650,6 +1650,10 @@ struct blk_dax_ctl { > pfn_t pfn; > }; > > +#define BDEV_RES_GET 0 > +#define BDEV_RES_MOD (1 << 0) > +#define BDEV_RES_PROVISION (1 << 1) > + > struct block_device_operations { > int (*open) (struct block_device *, fmode_t); > void (*release) (struct gendisk *, fmode_t); > @@ -1667,6 +1671,8 @@ struct block_device_operations { > int (*getgeo)(struct block_device *, struct hd_geometry *); > /* this callback is with swap_lock and sometimes page table lock held */ > void (*swap_slot_free_notify) (struct block_device *, unsigned long); > + int (*reserve_space) (struct block_device *, int, sector_t, sector_t, > + sector_t *); > struct module *owner; > const struct pr_ops *pr_ops;
You know, I'm now wondering how much of this has overlap with the iomap interface we are adding for the VFS IO paths to map and allocate extents.... Cheers, Dave. -- Dave Chinner [email protected] -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
