[dpdk-dev] [PATCH] net/bonding: set started flag at the end of dev start

[dpdk-dev] [PATCH] net/bonding: set started flag at the end of dev start

[Radu Nicolau]

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

Re: [dpdk-dev] [PATCH] net/bonding: set started flag at the end of dev start

[Chas Williams]

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
>
>

Re: [dpdk-dev] [PATCH] net/bonding: set started flag at the end of dev start

[Radu Nicolau]

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.

[dpdk-dev] [PATCH v2] net/bonding: fix race condition

[Radu Nicolau]

Race condition can appear in the bond_mode_8023ad_periodic_cb()
callback when bonding port is stopped, reconfigured and restarted.

Re-ordered calls in bond_ethdev_start() to have callback alarm set
after slave ports are reconfigured.

Fixes: 2efb58cbab6e ("bond: new link bonding library")
Cc: stable@dpdk.org

Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
---
v2: reworked patch

 drivers/net/bonding/rte_eth_bond_pmd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index fc4d4fd..70ec728 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -2113,10 +2113,6 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
 		}
 	}
 
-	/* Update all slave devices MACs*/
-	if (mac_address_slaves_update(eth_dev) != 0)
-		goto out_err;
-
 	/* If bonded device is configure in promiscuous mode then re-apply config */
 	if (internals->promiscuous_en)
 		bond_ethdev_promiscuous_enable(eth_dev);
@@ -2157,6 +2153,10 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
 			(void *)&rte_eth_devices[internals->port_id]);
 	}
 
+	/* Update all slave devices MACs*/
+	if (mac_address_slaves_update(eth_dev) != 0)
+		goto out_err;
+
 	if (internals->user_defined_primary_port)
 		bond_ethdev_primary_set(internals, internals->primary_port);
 
-- 
2.7.5

Re: [dpdk-dev] [PATCH v2] net/bonding: fix race condition

[Chas Williams]

On Wed, Jul 25, 2018 at 5:46 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.
>
> Re-ordered calls in bond_ethdev_start() to have callback alarm set
> after slave ports are reconfigured.
>
> Fixes: 2efb58cbab6e ("bond: new link bonding library")
> Cc: stable@dpdk.org
>
> Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
>

Acked-by: Chas Williams <chas3@att.com>


> ---
> v2: reworked patch
>
>  drivers/net/bonding/rte_eth_bond_pmd.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c
> b/drivers/net/bonding/rte_eth_bond_pmd.c
> index fc4d4fd..70ec728 100644
> --- a/drivers/net/bonding/rte_eth_bond_pmd.c
> +++ b/drivers/net/bonding/rte_eth_bond_pmd.c
> @@ -2113,10 +2113,6 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
>                 }
>         }
>
> -       /* Update all slave devices MACs*/
> -       if (mac_address_slaves_update(eth_dev) != 0)
> -               goto out_err;
> -
>         /* If bonded device is configure in promiscuous mode then re-apply
> config */
>         if (internals->promiscuous_en)
>                 bond_ethdev_promiscuous_enable(eth_dev);
> @@ -2157,6 +2153,10 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
>                         (void *)&rte_eth_devices[internals->port_id]);
>         }
>
> +       /* Update all slave devices MACs*/
> +       if (mac_address_slaves_update(eth_dev) != 0)
> +               goto out_err;
> +
>         if (internals->user_defined_primary_port)
>                 bond_ethdev_primary_set(internals,
> internals->primary_port);
>
> --
> 2.7.5
>
>

Re: [dpdk-dev] [PATCH v2] net/bonding: fix race condition

[Thomas Monjalon]

27/07/2018 12:55, Chas Williams:
> On Wed, Jul 25, 2018 at 5:46 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.
> >
> > Re-ordered calls in bond_ethdev_start() to have callback alarm set
> > after slave ports are reconfigured.
> >
> > Fixes: 2efb58cbab6e ("bond: new link bonding library")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
> >
> 
> Acked-by: Chas Williams <chas3@att.com>

Applied, thanks