Re: [Libguestfs] [PATCH nbdkit v2 5/5] vddk: Implement parallel thread model

Since VDDK 6.0, asynchronous read and write operations are available. This commit makes use of these, allowing us to use the parallel thread model for increased performance. Note that at least VDDK 6.5 is required because VDDK 6.0 had a different and incompatible signature for VixDiskLibCompletionCB.

+static int +vddk_can_fua (void *handle) +{ + /* The Flush call was not available in VDDK < 6.0. */ + return VixDiskLib_Flush != NULL ? NBDKIT_FUA_NATIVE : NBDKIT_FUA_NONE; +} + +static int +vddk_can_flush (void *handle) +{ + /* The Flush call was not available in VDDK < 6.0. */ + return VixDiskLib_Flush != NULL; +}