On Mon, 2016-09-12 at 18:59 +0200, Greg Kroah-Hartman wrote:
> 4.4-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> [ Upstream commit b4ed5d1682c6613988c2eb1de55df5ac9988afcc ]
>
> Currently some "Unspecified error 0x80004005" is reported on the Windows
> side if something fails. Handle the ENOSPC case and return
> ERROR_DISK_FULL, which allows at least Copy-VMFile to report a meaning
> full error.
[...]
> @@ -98,14 +100,26 @@ done:
> static int hv_copy_data(struct hv_do_fcopy *cpmsg)
> {
> ssize_t bytes_written;
> + int ret = 0;
>
> bytes_written = pwrite(target_fd, cpmsg->data, cpmsg->size,
> cpmsg->offset);
>
> - if (bytes_written != cpmsg->size)
> - return HV_E_FAIL;
> + filesize += cpmsg->size;
> + if (bytes_written != cpmsg->size) {
> + switch (errno) {
[...]
If pwrite() returns a non-negative value less than the requested size,
errno is undefined. You need to keep trying to write the remaining
bytes until it returns -1.
Ben.
--
Ben Hutchings
Software Developer, Codethink Ltd.
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