net/bonding: set started flag at the end of dev start
Checks
Commit Message
Race condition can appear in the bond_mode_8023ad_periodic_cb()
callback when bonding port is stopped, reconfigured and restarted.
Fixes: 2efb58cbab6e ("bond: new link bonding library")
Cc: stable@dpdk.org
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
---
drivers/net/bonding/rte_eth_bond_pmd.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Comments
I think this adds another race. In
bond_ethdev_slave_link_status_change_monitor(), it checks to see if bonding
is started, if not it exits. So you need to have dev_started = 1 set
before you enable this callback.
On Fri, Jul 20, 2018 at 6:09 AM Radu Nicolau <radu.nicolau@intel.com> wrote:
> Race condition can appear in the bond_mode_8023ad_periodic_cb()
> callback when bonding port is stopped, reconfigured and restarted.
>
> Fixes: 2efb58cbab6e ("bond: new link bonding library")
> Cc: stable@dpdk.org
>
> Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
> ---
> drivers/net/bonding/rte_eth_bond_pmd.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c
> b/drivers/net/bonding/rte_eth_bond_pmd.c
> index fc4d4fd..6f66743 100644
> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> @@ -2087,8 +2087,6 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
> }
>
> eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
> - eth_dev->data->dev_started = 1;
> -
> internals = eth_dev->data->dev_private;
>
> if (internals->slave_count == 0) {
> @@ -2167,6 +2165,7 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
> internals->mode == BONDING_MODE_ALB)
> bond_tlb_enable(internals);
>
> + eth_dev->data->dev_started = 1;
> return 0;
>
> out_err:
> --
> 2.7.5
>
>
On 7/24/2018 3:34 PM, Chas Williams wrote:
> I think this adds another race. In
> bond_ethdev_slave_link_status_change_monitor(), it checks to see if
> bonding is started, if not it exits. So you need to have dev_started
> = 1 set before you enable this callback.
>
Indeed, I will have another look at this. Thanks for reviewing!
Can you also have a look at this one? https://patches.dpdk.org/patch/43187/
I think I addressed all your previous feedback.
@@ -2087,8 +2087,6 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
}
eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
- eth_dev->data->dev_started = 1;
-
internals = eth_dev->data->dev_private;
if (internals->slave_count == 0) {
@@ -2167,6 +2165,7 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
internals->mode == BONDING_MODE_ALB)
bond_tlb_enable(internals);
+ eth_dev->data->dev_started = 1;
return 0;
out_err: