[RFC v2 PATCH 03/10] block: add block_device_operations methods to set and get reserved space

Brian Foster
2016-04-12T16:43:00Z

From: Mike Snitzer <snitzer@redhat.com>

[BF:
- Killed wrapper functions.
- Condensed to single bdev op.]

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
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;
};
--
2.4.11