Re: [BUG] [bonding] bonding member delete bug

[Simon Jones <batmanustc@gmail.com>]

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Oh, it's fixed by 0911d4ec and f5e72e8e
----
Simon Jones


Simon Jones <batmanustc@gmail.com> 于2023年12月18日周一 10:51写道：

> Hi all,
>
> I'm using DPDK-21.11 in ovs-dpdk.
>
> I found a "bonding member delete bug" .
>
> 1. How to reproduce
>
> ```
> NOTICE: bondctl is a tool I develop, it's to control DPDK.
>
> ### step 1, Add bonding device bond0.
> bondctl add bond0 mode active-backup
>
> ### step 2, Add member m1 into bond0.
> bondctl set 0000:00:0a.0 master bond0
>
> ### step 3, Add bond0 into ovs bridge.
> ovs-vsctl add-port brp0 bond0 -- set interface bond0 type=dpdk
> options:dpdk-devargs=net_bonding-bond0
> (this command call @bond_ethdev_start at last.)
>
> ### step 4, Delete bond0 from ovs bridge.
> ovs-vsctl del-port br-phy bond0
> (this command call @bond_ethdev_stop at last.)
>
> ### step 5, Delete m1 from bond0.
> bondctl set 0000:00:0a.0 nomaster
>
> ### step 6, Delete bond0.
> bondctl del bond0
>
> ### step 7, Add bond0.
> bondctl add bond0 mode active-backup
>
> ### step 8, Add member m1 into bond0.
> bondctl set 0000:00:0a.0 master bond0
> (this command call @bond_ethdev_start at last.)
>
> ### Then got error message.
> 2023-12-15T08:24:04.153Z|00017|dpdk|ERR|Port 0 must be stopped to allow
> configurr
> ation
> 2023-12-15T08:24:04.153Z|00018|dpdk|ERR|bond_cmd_set_master(581) - can not
> confii
> g slave 0000:00:0a.0!
> ```
>
> 2. Debug
>
> I found the reason is, when member port is DOWN, then add operation will
> call "eth_dev->data->dev_started = 1;", but no one add active member port,
> so when delete bond0, will NOT call @rte_eth_dev_stop, then add bond0
> again, got error. Detail is:
> ```
> ### After step 1-3, add bond0 into ovs-dpdk
> bond_ethdev_start
>     eth_dev->data->dev_started = 1;
>     for (i = 0; i < internals->slave_count; i++) {
>         if (slave_configure(eth_dev, slave_ethdev) != 0) {
>         if (slave_start(eth_dev, slave_ethdev) != 0) {
>             rte_eth_dev_start
>
> ### NOTICE, as member port is DOWN, so will NOT call @activate_slave,
> so @active_slave_count is 0.
> bond_ethdev_lsc_event_callback
>     activate_slave(bonded_eth_dev, port_id);
>
> ### After step 4, delete bond0 from ovs-dpdk, NOTICE,
> as @active_slave_count is 0, so will NOT call @rte_eth_dev_stop
> bond_ethdev_stop
>     for (i = 0; i < internals->slave_count; i++) {
>         if (find_slave_by_id(internals->active_slaves,
>                 internals->active_slave_count, slave_id) !=
>                         internals->active_slave_count) {
>             ret = rte_eth_dev_stop(slave_id);
>
> ### After step 5-7, delete bond0 and then add bond0
>
> ### After step 8, add bond0, as it's NOT call @rte_eth_dev_stop, so call @rte_eth_dev_start
> again will got error.
> 2023-12-15T08:24:04.153Z|00017|dpdk|ERR|Port 0 must be stopped to allow
> configurr
> ation
>
> ```
>
> 3. My question
>
> Is this bug fixed ? Which commit ?
>
> If NOT, how to fix this bug? I think it's better to call @rte_eth_dev_stop
> for every member, even it's DOWN. How about this?
>
> Thanks~
>
>
> ----
> Simon Jones
>

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