Bug 241737
| Summary: | cannot use the tap interface name to build a VM | ||||||||
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| Product: | Base System | Reporter: | Fabien Costard <fabien.costard> | ||||||
| Component: | bhyve | Assignee: | freebsd-virtualization (Nobody) <virtualization> | ||||||
| Status: | Closed FIXED | ||||||||
| Severity: | Affects Only Me | CC: | kevans | ||||||
| Priority: | --- | Keywords: | patch | ||||||
| Version: | 12.0-RELEASE | ||||||||
| Hardware: | Any | ||||||||
| OS: | Any | ||||||||
| Attachments: |
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(In reply to Fabien Costard from comment #0) Hmm... unfortunately, this should work fine in -CURRENT and stable/12, but the patch will not go to stable/11 and did not make it into 12.1. The merged tuntap(4) will create a dev alias for the different name: root@viper:/usr/src# ifconfig tap create name port1 port1 root@viper:/usr/src# ls -l /dev | grep tap lrwxr-xr-x 1 root wheel 4 Nov 7 07:52 port1 -> tap0 crw------- 1 uucp dialer 0x60 Nov 7 07:52 tap0 I do not have any insight into how -virtualization would prefer to proceed, but this is news from the tun/tap side. =-) (In reply to Kyle Evans from comment #1) Hi, That is a good with the link. As advice me a friend, I am also trying to find another way (to myself, this is a good way to learn) to find the source device file instead of checking the /dev folder. I hope it will be more generic Created attachment 209488 [details]
update_code on pci_virtio_net.c
Hello,
My code was very ugly and bad.. It does not work well. I find I have an issue when I used more that 8 tap interfaces.
After I worked on memory allocation & co... I send you for memories an upgrade of the code.
I know about the previous comments, but I do not want to let a wrong code :-)
Regards,
Fabien
Ok with the link :-) Thanks ! |
Created attachment 208881 [details] modification on pci_virtio_net.c Hi, If a tap interface is created with a name, it is not possible to start a VM with bhyve using this name. We must use the device name. For example, I create this interface (sysctl is correctly configured to use tap): ifconfig tap create name port1 when I launch the VM (after loaded it for sure) bhyve -c 1 -m 256 -A -H -P -s 0:0,hostbridge -s 1,virtio-net,port1 -s 2:0 virtio-blk,/root/rFreeBSD.img -s 31,lpc -l com1,/dev/nmdm0A rFreeBSD The network will not work because the command is only develop to check device in /dev/. I add some code to check if the name matches with a interface and replace it to create the virtual interface I hope I was enough clear and my code not too ugly