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filter: Add 'status' property for filter object

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With this property, users can control if this filter is 'on'
or 'off'. The default behavior for filter is 'on'.

For some types of filters, they may need to react to status changing,
So here, we introduced status changing callback/notifier for filter class.

We will skip the disabled ('off') filter when delivering packets in net layer.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Yang Hongyang <hongyang.yang@easystack.cn>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
zhanghailiang 2016-03-01 13:37:02 +08:00 • committed by Jason Wang
parent 9fe7101f1d
commit 338d3f415e
3 changed files with 48 additions and 1 deletions
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4
qemu-options.hx
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@ -3788,11 +3788,13 @@ version by providing the @var{passwordid} parameter. This provides
the ID of a previously created @code{secret} object containing the
password for decryption.
@item -object filter-buffer,id=@var{id},netdev=@var{netdevid},interval=@var{t}[,queue=@var{all|rx|tx}]
@item -object filter-buffer,id=@var{id},netdev=@var{netdevid},interval=@var{t}[,queue=@var{all|rx|tx}][,status=@var{on|off}]
Interval @var{t} can't be 0, this filter batches the packet delivery: all
packets arriving in a given interval on netdev @var{netdevid} are delayed
until the end of the interval. Interval is in microseconds.
@option{status} is optional that indicate whether the netfilter is
on (enabled) or off (disabled), the default status for netfilter will be 'on'.
queue @var{all|rx|tx} is an option that can be applied to any netfilter.