The VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON event allows @reason to be reported to the user, but currently we only report 'enospc'. Extend the documentation so that we allow the passthrough of the verbatim error, prefixed by 'other: ' in order to prevent collisions and note that users must not attempt to parse them. Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx> --- include/libvirt/libvirt-domain.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h index 2a4b81f4df..e031b23547 100644 --- a/include/libvirt/libvirt-domain.h +++ b/include/libvirt/libvirt-domain.h @@ -4790,8 +4790,12 @@ typedef void (*virConnectDomainEventIOErrorCallback)(virConnectPtr conn, * If the I/O error is known to be caused by an ENOSPC condition in * the host (where resizing the disk to be larger will allow the guest * to be resumed as if nothing happened), @reason will be "enospc". - * Otherwise, @reason will be "", although future strings may be added - * if determination of other error types becomes possible. + * + * Otherwise, if the hypervisor reported an error @reason will be the verbatim + * error message from hypervisor prefixed by "other: ". Note that this error + * may not be stable and thus is only really usable for human use. In case + * when the hypervisor doesn't report the error @reason will be an empty string + * "". * * Since: 0.8.1 */ -- 2.48.1
