options: Add documentation for filter-dump
Add a short description for the filter-dump command line options. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
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@ -2012,6 +2012,7 @@ qemu -m 512 -object memory-backend-file,id=mem,size=512M,mem-path=/hugetlbfs,sha
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Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default).
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At most @var{len} bytes (64k by default) per packet are stored. The file format is
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libpcap, so it can be analyzed with tools such as tcpdump or Wireshark.
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Note: For devices created with '-netdev', use '-object filter-dump,...' instead.
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@item -net none
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Indicate that no network devices should be configured. It is used to
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@ -3665,6 +3666,13 @@ queue @var{all|rx|tx} is an option that can be applied to any netfilter.
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@option{tx}: the filter is attached to the transmit queue of the netdev,
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where it will receive packets sent by the netdev.
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@item -object filter-dump,id=@var{id},netdev=@var{dev},file=@var{filename}][,maxlen=@var{len}]
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Dump the network traffic on netdev @var{dev} to the file specified by
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@var{filename}. At most @var{len} bytes (64k by default) per packet are stored.
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The file format is libpcap, so it can be analyzed with tools such as tcpdump
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or Wireshark.
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@end table
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ETEXI
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