diff options
Diffstat (limited to 'drivers/block/xen-blkback/common.h')
| -rw-r--r-- | drivers/block/xen-blkback/common.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h index 9ad3b5ec1dc..ae7951f0e26 100644 --- a/drivers/block/xen-blkback/common.h +++ b/drivers/block/xen-blkback/common.h @@ -34,6 +34,7 @@ #include <linux/vmalloc.h> #include <linux/wait.h> #include <linux/io.h> +#include <linux/rbtree.h> #include <asm/setup.h> #include <asm/pgalloc.h> #include <asm/hypervisor.h> @@ -160,10 +161,22 @@ struct xen_vbd { sector_t size; bool flush_support; bool discard_secure; + + unsigned int feature_gnt_persistent:1; + unsigned int overflow_max_grants:1; }; struct backend_info; + +struct persistent_gnt { + struct page *page; + grant_ref_t gnt; + grant_handle_t handle; + uint64_t dev_bus_addr; + struct rb_node node; +}; + struct xen_blkif { /* Unique identifier for this interface. */ domid_t domid; @@ -190,6 +203,10 @@ struct xen_blkif { struct task_struct *xenblkd; unsigned int waiting_reqs; + /* tree to store persistent grants */ + struct rb_root persistent_gnts; + unsigned int persistent_gnt_c; + /* statistics */ unsigned long st_print; int st_rd_req; |