[dpdk-dev] [PATCH v2] net/mlx5: fix VXLAN port registration race condition

[Shahaf Shuler]

Wednesday, January 23, 2019 3:19 PM, Viacheslav Ovsiienko:
> Subject: [dpdk-dev] [PATCH v2] net/mlx5: fix VXLAN port registration race
> condition
> 
> E-Switch VXLAN tunneling rules require virtual VXLAN network devices be
> created. These devices are managed by MLX5 PMD and created/deleted
> dynamically.
> 
> Kernel creates the VXLAN devices and registers VXLAN UDP ports to be
> hardware offloaded within the NIC kernel drivers. The registration process is
> being performed into context of working kernel thread and the race
> conditions might happen.
> 
> The VXLAN device is created and success code is returned to calling
> application, but the UDP port registration process is not completed yet and
> the next applied rule might be rejected by the driver with ENOSUP code. This
> patch adds some timeout for new created devices, allowing port registration
> process to be completed. The waiting is performed once after device been
> created and first rule is being applied.
> 
> Fixes: 95a464cecc21 ("net/mlx5: add E-switch VXLAN tunnel devices
> management")
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>

Applied to next-net-mlx, thanks.