[dpdk-dev] [Bug 613] [21.02] rule lost after port stopped

[Ferruh Yigit]

On 1/14/2021 7:15 AM, bugzilla at dpdk.org wrote:
> https://bugs.dpdk.org/show_bug.cgi?id=613
> 
>              Bug ID: 613
>             Summary: [21.02] rule lost after port stopped
>             Product: DPDK
>             Version: unspecified
>            Hardware: x86
>                  OS: Linux
>              Status: UNCONFIRMED
>            Severity: normal
>            Priority: Normal
>           Component: testpmd
>            Assignee: dev at dpdk.org
>            Reporter: qinx.sun at intel.com
>    Target Milestone: ---
> 
> create a rule in testpmd, stop port and then flow list port find that rule
> lost.
> 
> Environment
> 
> DPDK version: Use make showversion or for a non-released version: git remote -v
> && git show-ref --heads
> 21.02.0-rc0:0144eeafd1467937a379a7dc005bcb0579b0ae5e
> Other software versions: name/version for QEMU, OVS, etc. Repeat as required.
> OS: CentOS8.3
> Compiler: gcc version 8.3.1 20191121 (Red Hat 8.3.1-5)
> Hardware platform: Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz
> NIC hardware: Ethernet Controller E810-C for SFP 1593
> NIC firmware: 2.30 0x80004dcf 1.2839.0
> NIC driver: 1.3.0_dirty
> Pkg: ice-comms_1.3.24.0
> 
> [reproduce steps]
> 1. bind to vfio-pci and create 2 vfs
> usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:03:00.0
> echo 2 > /sys/bus/pci/devices/0000:03:00.0/sriov_numvfs
> 
> 2. start testpmd
> x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 1,2,3,4 -n 4 -a
> 0000:03:01.0,cap=dcf -a 0000:03:01.1  --file-prefix=dpdk_1965_20210114114229
> -- -i
> 
> 3. create a rule
> testpmd> flow create 0 ingress pattern eth dst is 68:05:ca:8d:ed:a8 / ipv4 src
> is 192.168.0.1 dst is 192.168.0.2 tos is 4 ttl is 3 / udp src is 25 dst is 23 /
> end actions vf id 1 / end
> Flow rule #1 created
> 
> 4. list rule
> testpmd> flow list 0
> ID      Group   Prio    Attr    Rule
> 0       0       0       i--     ETH IPV4 UDP => VF
> 
> 5.stop port 0
> testpmd> port stop 0
> Stopping ports...
> Checking link statuses...
> Done
> 
> 6.list rule
> testpmd> flow list 0
> testpmd>
> 
> Actual Result: rule lost after port stopped
> 
> Expected Result: The result of rule list is the same as step 4.
> 
> Regression
> Is this issue a regression: (Y)
> 
> Version the regression was introduced: Specify git id if known.
> 
> commit 0f93edbf7c874480e21e365f527fecdb305984b9
> Author: Gregory Etelson <getelson at nvidia.com>
> Date: Thu Nov 26 18:43:02 2020 +0200
> 
> app/testpmd: release flows left before port stop
> 
> According to RTE flow user guide, PMD will not keep flow rules after
> port stop. Application resources that refer to flow rules become
> obsolete after port stop and must not be used.
> Testpmd maintains linked list of active flows for each port. Entries in
> that list are allocated dynamically and must be explicitly released to
> prevent memory leak.
> The patch releases testpmd port flow_list that holds remaining flows
> before port is stopped.
> 
> Cc: stable at dpdk.org
> 
> Signed-off-by: Gregory Etelson <getelson at nvidia.com>
> Acked-by: Ori Kam <orika at nvidia.com>
> Acked-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
> 

cc'ed Gregory & Ori.