| Message ID | 20230131182048.15535-1-vlaomao@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | MAC address falls to permanent | expand |
On Tue, 31 Jan 2023 at 18:22, Vlao Mao <vlaomao@gmail.com> wrote: > > A bug was found with the vmxnet3 driver, after changing the MAC address > and rebooting, it falls into the category of a permanent address until > the VM is turned off. For some network device models (those where the hardware has an EEPROM and we're modelling "guest programmed a new MAC address into the EEPROM") that is the correct behaviour. Is the vmxnet3 definitely one of the kind which is not supposed to have a permanent MAC address backing storage ? (It's paravirtual, so this would hopefully be indicated in the specs for it.) thanks -- PMM
I cannot say for sure, but e1000 does not have this behavior, vmxnet3 in vmware also does not behave this way. In addition, the address gets there only after a reboot, it does not get there during normal operation, as you can see from logs i attached. It seems to me that this is not quite the expected behavior, isn't it? вт, 31 янв. 2023 г. в 21:48, Peter Maydell <peter.maydell@linaro.org>: > > On Tue, 31 Jan 2023 at 18:22, Vlao Mao <vlaomao@gmail.com> wrote: > > > > A bug was found with the vmxnet3 driver, after changing the MAC address > > and rebooting, it falls into the category of a permanent address until > > the VM is turned off. > > For some network device models (those where the hardware has an > EEPROM and we're modelling "guest programmed a new MAC address > into the EEPROM") that is the correct behaviour. Is the vmxnet3 > definitely one of the kind which is not supposed to have a > permanent MAC address backing storage ? (It's paravirtual, so > this would hopefully be indicated in the specs for it.) > > thanks > -- PMM
A bug was found with the vmxnet3 driver, after changing the MAC address and rebooting, it falls into the category of a permanent address until the VM is turned off. Here is log output: -bash-4.4# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: ens3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff -bash-4.4# ip link set dev ens3 address 33:33:33:33:33:33 -bash-4.4# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: ens3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 33:33:33:33:33:33 brd ff:ff:ff:ff:ff:ff -bash-4.4# ethtool -P ens3 Permanent address: 52:54:00:12:34:56 -bash-4.4# reboot //rebooting -bash-4.4# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 2: ens3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 33:33:33:33:33:33 brd ff:ff:ff:ff:ff:ff -bash-4.4# ethtool -P ens3 Permanent address: 33:33:33:33:33:33 -bash-4.4# Vlao Mao (1): vmxnet3: add mac address restore upon reset hw/net/vmxnet3.c | 2 ++ 1 file changed, 2 insertions(+)