Re: [PATCH v4 0/9] net/memif: lifecycle fixes and unit test

[Stephen Hemminger <stephen@networkplumber.org>]

On Fri, 16 Oct 2026 21:58:48 +0200
Sriram Yagnaraman <sriram.yagnaraman@ericsson.com> wrote:

> This series fixes a set of error-path and lifecycle bugs in the memif
> PMD and adds a unit test for the driver.
> 
> The first eight patches are fixes:
> 
>  - guard eth_memif_tx() against an empty burst (nb_pkts == 0);
>  - close file descriptor 0 instead of leaking it;
>  - do not close the EAL-owned memseg fd in zero-copy mode;
>  - free the MAC address allocated during probe on failure;
>  - unwind a partially-created device on create failure;
>  - refuse connections on a stopped server so it does not come up on a
>    stopped port;
>  - disconnect on close so a stopped server's control channel is not
>    leaked, and make memif_disconnect() safe on a never-started device;
>  - fix eth_memif_tx_zc() returning 65535 on an invalid interrupt fd.
> 
> The last patch adds a memif PMD unit test (app/test, memif_pmd_autotest):
> a server/client vdev pair over a loopback socket covering dev_info, link
> state, stats, single-segment loopback (slow and fast path), multi-segment
> loopback across a ring wrap, stop/start reconnect, empty Tx burst, close
> without stop, and a stopped server refusing a peer.
> 
> Verified: memif_pmd_autotest passes 11/11 (~1.4s); devtools/test-memif.sh
> two-process forwarding OK; each commit builds with -Dwerror=true;
> check-git-log and checkpatch are clean.
> 
> Thanks to Stephen Hemminger and the ai-code-review bot for the reviews
> that shaped this series.

Applied to next-net.