TCPDUMP error

Neooostef · November 23

Hello

I encounter a problem when I run the TCPDUMP command Here is the error

eth0: SIOCETHTOOL(ETHTOOL_GLINK) ioctl failed: Device or resource busy

Work like a charm with Radxa Debian OS, but on two Armbian same problem.

Someone knows why ?

Thanks

Werner · November 23

Providing logs with

armbianmonitor -u

helps with troubleshooting and significantly raises chances that issue gets addressed.

Neooostef · November 23

Collecting info and sending to paste.armbian.com, wait...
/usr/bin/armbianmonitor: line 976: iostat: command not found
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot POST /log</pre>
</body>
</html>

Edited November 23 by Neooostef

Neooostef · November 23

armbianmonitor don't return error

When i'm use "tcpdump" or "arp-scan" same error

neooo@radxa-zero3:~$ tcpdump host 192.168.1.1
tcpdump: end1: SIOCETHTOOL(ETHTOOL_GLINK) ioctl failed: Device or resource busy

But when i specify interface, it's work

neooo@radxa-zero3:~$ sudo tcpdump -i wlan0 host 192.168.1.1
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
23:25:56.936639 IP radxa-zero3.47793 > _gateway.domain: 57863+ [1au] A? whatismyip.akamai.com. (50)
23:25:56.937550 IP radxa-zero3.52220 > _gateway.domain: 16210+ [1au] AAAA? whatismyip.akamai.com. (50)
23:25:56.942649 IP _gateway.domain > radxa-zero3.52220: 16210 2/1/1 CNAME whatismyip.akamai.com.edgesuite.net., CNAME a1524.g.akamai.net. (179)

I have trying to disable end1 but not work

neooo@radxa-zero3:~$ sudo ip link set end1 down
neooo@radxa-zero3:~$ tcpdump host 192.168.1.1
tcpdump: end1: SIOCETHTOOL(ETHTOOL_GLINK) ioctl failed: Device or resource busy
neooo@radxa-zero3:~$ sudo nmcli device disconnect end1
Device 'end1' successfully disconnected.
neooo@radxa-zero3:~$ sudo nmcli device status
DEVICE         TYPE      STATE                                  CONNECTION
wlan0          wifi      connected                              netplan-wlan0-Neooostef6
br0            bridge    connecting (getting IP configuration)  netplan-br0
lo             loopback  connected (externally)                 lo
end1           ethernet  disconnected                           --
p2p-dev-wlan0  wifi-p2p  disconnected                           --
neooo@radxa-zero3:~$ tcpdump
tcpdump: end1: SIOCETHTOOL(ETHTOOL_GLINK) ioctl failed: Device or resource busy

i'm trying to Identify the processes using the interface, but no process

neooo@radxa-zero3:~$ sudo lsof | grep end1
neooo@radxa-zero3:~$

I am very destabilized, you have an idea?

Edited November 23 by Neooostef

Werner · November 24

You can force output to terminal when using -U instead of -u with armbianmonitor. Copy everything to a paste service like paste.debian.net or paste.armbian.de when paste.armbian.com doesn't cut it

Neooostef · November 24

Hi on fresh install

https://paste.armbian.de/kinafawoha.yaml

My model is Radxa Zero 3W 8gb ram and 64 eMMC

Edited November 24 by Neooostef

Neooostef · November 24

I have found a solution.

I have compile a specific overlay for disable Ethernet "gmac1"

nano radxa-zero3-disabled-ethernet.dts

/dts-v1/;
/plugin/;
/ {
	metadata {
		title = "Disabled Zero 3W Ethernet";
		compatible = "radxa,zero3";
		category = "misc";
		description = "Disabled Zero 3W Ethernet.";
	};
};
&mdio1 {
	status = "disabled";
};
&gmac1 {
	status = "disabled";
};

and after

sudo armbian-add-overlay radxa-zero3-disabled-ethernet.dts

after reboot, all work fine

neooo@radxa-zero3:~$ sudo tcpdump
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
13:05:31.533450 IP radxa-zero3.ssh > 192.168.1.118.50080: Flags [P.], seq 776960108:776960316, ack 799701818, win 501, length 208
13:05:31.581864 IP 192.168.1.118.50080 > radxa-zero3.ssh: Flags [.], ack 208, win 1024, length 0
^C
2 packets captured
9 packets received by filter
0 packets dropped by kernel

Thanks for help