xen/blkback: Add support for BLKIF_OP_FLUSH_DISKCACHE and drop BLKIF_OP_WRITE_BARRIER.
We drop the support for 'feature-barrier' and add in the support
for the 'feature-flush-cache' if the real backend storage supports
flushing.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index 16af388..af93837 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -53,6 +53,7 @@
u32 pdevice; /* phys device that this vbd maps to */
struct block_device *bdev;
sector_t size; /* Cached size parameter */
+ bool flush_support;
};
struct backend_info;
@@ -85,7 +86,7 @@
int st_rd_req;
int st_wr_req;
int st_oo_req;
- int st_br_req;
+ int st_f_req;
int st_rd_sect;
int st_wr_sect;
@@ -120,8 +121,8 @@
irqreturn_t xen_blkif_be_int(int irq, void *dev_id);
int xen_blkif_schedule(void *arg);
-int xen_blkbk_barrier(struct xenbus_transaction xbt,
- struct backend_info *be, int state);
+int xen_blkbk_flush_diskcache(struct xenbus_transaction xbt,
+ struct backend_info *be, int state);
struct xenbus_device *xen_blkbk_xenbus(struct backend_info *be);