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vfio: add strread/writeerror()

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Add simple helpers to correctly report failures from read/write routines
using the return -errno style.

Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250507152020.1254632-7-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
John Levon 2025-05-07 16:20:11 +01:00 • committed by Cédric Le Goater
parent 2e27becf17
commit 5363a1a117
1 changed files with 14 additions and 0 deletions
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14
include/hw/vfio/vfio-device.h
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@ -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);