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3f39a0bf27
* tools/virsh.c: fix missing zero value judgement in cmdBlkiotune and correct
vshError information.
when weight is equal to 0, the cmdBlkiotune will not raise any error information
when judge weight value first time, and execute else branch to judge weight
value again, strncpy(temp->field, VIR_DOMAIN_BLKIO_WEIGHT, sizeof(temp->field))
will be not executed for ever. However, if and only if param->field is equal
to VIR_DOMAIN_BLKIO_WEIGHT, underlying qemuDomainSetBlkioParameters function
will check whether weight value is in range [100, 1000].
* how to reproduce?
% virsh blkiotune ${guestname} --weight 0
Signed-off-by: Alex Jia <ajia@redhat.com>