From: John Levon <john.le...@nutanix.com> Add simple helpers to correctly report failures from read/write routines using the return -errno style.
Signed-off-by: John Levon <john.le...@nutanix.com> Reviewed-by: Cédric Le Goater <c...@redhat.com> Link: https://lore.kernel.org/qemu-devel/20250507152020.1254632-7-john.le...@nutanix.com Signed-off-by: Cédric Le Goater <c...@redhat.com> --- include/hw/vfio/vfio-device.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h index a7eaaa31e7e98a1ec73eefde0d935842ef9da401..4a3220294309d718bb3230a5d3f4bab9e082f951 100644 --- a/include/hw/vfio/vfio-device.h +++ b/include/hw/vfio/vfio-device.h @@ -115,6 +115,20 @@ struct VFIODeviceOps { int (*vfio_load_config)(VFIODevice *vdev, QEMUFile *f); }; +/* + * Given a return value of either a short number of bytes read or -errno, + * construct a meaningful error message. + */ +#define strreaderror(ret) \ + (ret < 0 ? strerror(-ret) : "short read") + +/* + * Given a return value of either a short number of bytes written or -errno, + * construct a meaningful error message. + */ +#define strwriteerror(ret) \ + (ret < 0 ? strerror(-ret) : "short write") + void vfio_device_irq_disable(VFIODevice *vbasedev, int index); void vfio_device_irq_unmask(VFIODevice *vbasedev, int index); void vfio_device_irq_mask(VFIODevice *vbasedev, int index); -- 2.49.0
