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Rewriting -net to new style syntax?

From: Ede Wolf
Subject: Rewriting -net to new style syntax?
Date: Thu, 11 Jun 2020 07:52:56 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0


Reading, that -net is deprecated and in this case not working any more, I am trying to rewrite a network config in the -netdev/-device syntax. However, I am failing to convert:

-net nic,model=virtio,macaddr=02:.. -net tap,fd=3 3<>/dev/tap9

I've tried to put the filedescriptor in different places:

-netdev tap,[fd=3 3<>/dev/tap9,]id=macvtap,[ifname=fd=3 <>/dev/tap9,]script=no,downscript=no,vhost=on\
 -device virtio-net,netdev=macvtap,mac=02:...\

 But I am always ending up with something like:

qemu-system-x86_64: 3<>/dev/tap9,id=macvtap,script=no,downscript=no: Could not open '3<>/dev/tap9,id=macvtap,script=no,downscript=no': No such file or directory

 Needless to say, /dev/tap9 is existent and has the proper permissions

 Any ideas or documentation that shed some light onto this?



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