libnvme/ioctl: limit to use NVME_IOCTL_IO64_CMD only for block dev

Since currently NVME_IOCTL_IO64_CMD not supported for the char dev.
Currently the char dev nvmeX not able be used for the io-passthru command.
Also previously NVME_IOCTL_IO_CMD used for the io-passthru command.
Therefore for the char dev nvmeX use NVME_IOCTL_IO_CMD instead.

Signed-off-by: Tokunori Ikegami <[email protected]>

Author: ikegami-t

libnvme/src/nvme/ioctl.c

@@ -178,7 +178,7 @@ static int nvme_submit_passthru64(struct nvme_transport_handle *hdl,
 int nvme_submit_io_passthru(struct nvme_transport_handle *hdl,
 		struct nvme_passthru_cmd *cmd)
 {
-	if (hdl->ioctl64)
+	if (hdl->ioctl64 && S_ISBLK(hdl->stat.st_mode))
 		return nvme_submit_passthru64(hdl, NVME_IOCTL_IO64_CMD, cmd);
 	return nvme_submit_passthru32(hdl, NVME_IOCTL_IO_CMD, cmd);
 }