[PATCH] net/mlx4: fix targetless internal rule creation

[PATCH] net/mlx4: fix targetless internal rule creation

[Matan Azrad]

The corrupted code allowed to create internal rule with no any target queue
in case the rule creation ocured before queues creation.

For example, when user calls rte_eth_dev_default_mac_addr_set after probe
and before dev_configure, mlx4 failis because the RSS queue number was 0.

The fix prevents internal rules creation before queues creation based on
future creation before traffic start.

Fixes: 7d8675956f57 ("net/mlx4: add RSS support outside flow API")

Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 drivers/net/mlx4/mlx4_flow.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
index a0f431b..7a6097f 100644
--- a/drivers/net/mlx4/mlx4_flow.c
+++ b/drivers/net/mlx4/mlx4_flow.c
@@ -1290,6 +1290,9 @@ struct mlx4_drop {
 	unsigned int i;
 	int err = 0;
 
+	/* Nothing to be done if there are no Rx queues. */
+	if (!queues)
+		goto error;
 	/* Prepare default RSS configuration. */
 	*rss_conf = (struct rte_flow_action_rss){
 		.rss_conf = NULL, /* Rely on default fallback settings. */
-- 
1.8.3.1

Re: [PATCH] net/mlx4: fix targetless internal rule creation

[Adrien Mazarguil]

On Tue, Oct 24, 2017 at 08:45:30AM +0000, Matan Azrad wrote:
> The corrupted code allowed to create internal rule with no any target queue
> in case the rule creation ocured before queues creation.

ocured => occurred

> 
> For example, when user calls rte_eth_dev_default_mac_addr_set after probe
> and before dev_configure, mlx4 failis because the RSS queue number was 0.

failis => fails

> 
> The fix prevents internal rules creation before queues creation based on
> future creation before traffic start.
> 
> Fixes: 7d8675956f57 ("net/mlx4: add RSS support outside flow API")

Since adding MAC addresses before dev_configure() was not taken into account
in the design of the affected function, I suggest appending:

Fixes: bdcad2f4843a ("net/mlx4: refactor internal flow rules")

> Signed-off-by: Matan Azrad <matan@mellanox.com>

Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

Thanks.

-- 
Adrien Mazarguil
6WIND

[PATCH v2] net/mlx4: fix targetless internal rule creation

[Matan Azrad]

The corrupted code allowed to create internal rule with no any target queue
in case the rule creation occurred before queues creation.

For example, when user calls rte_eth_dev_default_mac_addr_set after probe
and before dev_configure, mlx4 fails because the RSS queue number was 0.

The fix prevents internal rules creation before queues creation based on
future creation before traffic start.

Fixes: 7d8675956f57 ("net/mlx4: add RSS support outside flow API")
Fixes: bdcad2f4843a ("net/mlx4: refactor internal flow rules")

Signed-off-by: Matan Azrad <matan@mellanox.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
 drivers/net/mlx4/mlx4_flow.c | 3 +++
 1 file changed, 3 insertions(+)

V2:
Fix typos in commit log.
Append fixes line.

diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c
index a0f431b..7a6097f 100644
--- a/drivers/net/mlx4/mlx4_flow.c
+++ b/drivers/net/mlx4/mlx4_flow.c
@@ -1290,6 +1290,9 @@ struct mlx4_drop {
 	unsigned int i;
 	int err = 0;
 
+	/* Nothing to be done if there are no Rx queues. */
+	if (!queues)
+		goto error;
 	/* Prepare default RSS configuration. */
 	*rss_conf = (struct rte_flow_action_rss){
 		.rss_conf = NULL, /* Rely on default fallback settings. */
-- 
1.8.3.1

Re: [PATCH v2] net/mlx4: fix targetless internal rule creation

[Ferruh Yigit]

On 10/24/2017 3:05 AM, Matan Azrad wrote:
> The corrupted code allowed to create internal rule with no any target queue
> in case the rule creation occurred before queues creation.
> 
> For example, when user calls rte_eth_dev_default_mac_addr_set after probe
> and before dev_configure, mlx4 fails because the RSS queue number was 0.
> 
> The fix prevents internal rules creation before queues creation based on
> future creation before traffic start.
> 
> Fixes: 7d8675956f57 ("net/mlx4: add RSS support outside flow API")
> Fixes: bdcad2f4843a ("net/mlx4: refactor internal flow rules")
> 
> Signed-off-by: Matan Azrad <matan@mellanox.com>
> Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

Applied to dpdk-next-net/master, thanks.