[Libguestfs] [PATCH nbdkit 2/5] vddk: Add read, write and wait asynchronous functions
These functions added in VDDK 6.0 - 6.5 implement asynchronous read
and write.
---
plugins/vddk/vddk-structs.h | 3 +++
plugins/vddk/vddk-stubs.h | 19 ++++++++++++++++++-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/plugins/vddk/vddk-structs.h b/plugins/vddk/vddk-structs.h
index aeb5bfd0f..e97f017cd 100644
--- a/plugins/vddk/vddk-structs.h
+++ b/plugins/vddk/vddk-structs.h
@@ -43,6 +43,7 @@
typedef uint64_t VixError;
#define VIX_OK 0
+#define VIX_ASYNC 25000
#define VIXDISKLIB_FLAG_OPEN_UNBUFFERED 1
#define VIXDISKLIB_FLAG_OPEN_SINGLE_LINK 2
@@ -61,6 +62,8 @@ typedef void *VixDiskLibHandle;
typedef void VixDiskLibGenericLogFunc (const char *fmt, va_list args);
+typedef void (*VixDiskLibCompletionCB) (void *data, VixError result);
+
enum VixDiskLibCredType {
VIXDISKLIB_CRED_UID = 1,
VIXDISKLIB_CRED_SESSIONID = 2,
diff --git a/plugins/vddk/vddk-stubs.h b/plugins/vddk/vddk-stubs.h
index a94df9cda..66353691c 100644
--- a/plugins/vddk/vddk-stubs.h
+++ b/plugins/vddk/vddk-stubs.h
@@ -103,10 +103,27 @@ STUB (VixDiskLib_Write,
uint64_t start_sector, uint64_t nr_sectors,
const unsigned char *buf));
-/* Added in VDDK 6.0, this will be NULL in earlier versions. */
+/* Added in VDDK 6.0, these will be NULL in earlier versions. */
OPTIONAL_STUB (VixDiskLib_Flush,
VixError,
(VixDiskLibHandle handle));
+OPTIONAL_STUB (VixDiskLib_ReadAsync,
+ VixError,
+ (VixDiskLibHandle handle,
+ uint64_t start_sector, uint64_t nr_sectors,
+ unsigned char *buf,
+ VixDiskLibCompletionCB callback, void *data));
+OPTIONAL_STUB (VixDiskLib_WriteAsync,
+ VixError,
+ (VixDiskLibHandle handle,
+ uint64_t start_sector, uint64_t nr_sectors,
+ const unsigned char *buf,
+ VixDiskLibCompletionCB callback, void *data));
+
+/* Added in VDDK 6.5, this will be NULL in earlier versions. */
+OPTIONAL_STUB (VixDiskLib_Wait,
+ VixError,
+ (VixDiskLibHandle handle));
/* Added in VDDK 6.7, these will be NULL for earlier versions: */
OPTIONAL_STUB (VixDiskLib_QueryAllocatedBlocks,
--
2.32.0