From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by passt.top (Postfix, from userid 1000) id 58F0C5A061A; Mon, 03 Nov 2025 11:16:12 +0100 (CET) From: Stefano Brivio To: passt-dev@passt.top, Laurent Vivier Subject: [RFC PATCH 0/5] Pad all inbound frames to 802.3 minimum size if needed Date: Mon, 3 Nov 2025 11:16:07 +0100 Message-ID: <20251103101612.1412079-1-sbrivio@redhat.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: SY32SIJD4AXPLEBVI3HWJZAC7SLL22V3 X-Message-ID-Hash: SY32SIJD4AXPLEBVI3HWJZAC7SLL22V3 X-MailFrom: sbrivio@passt.top X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: David Gibson X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Patch 1/5 handles the easy non-batched case with a copy to a padded buffer (only if needed). Patches 2/5 and 3/5 clean coding style up before further changes. Patch 4/5 deals with TCP and UDP batched frames in non-vhost-user modes. Patch 5/5 is for batched frames in vhost-user mode instead, and this is the part I'm the least confident about, in particular with regard to the size assumptions on vhost-user provided buffers. Stefano Brivio (5): tap: Pad non-batched frames to 802.3 minimum (60 bytes) if needed tcp: Fix coding style for comment to enum tcp_iov_parts udp: Fix coding style for comment to enum udp_iov_idx tcp, udp: Pad batched frames to 60 bytes (802.3 minimum) in non-vhost-user modes tcp, udp: Pad batched frames for vhost-user modes to 60 bytes (802.3 minimum) tap.c | 7 +++++++ tcp.c | 2 -- tcp_buf.c | 23 +++++++++++++++++++++++ tcp_internal.h | 5 ++++- tcp_vu.c | 27 +++++++++++++++++++++++++++ udp.c | 31 ++++++++++++++++++++++++++----- udp_vu.c | 11 ++++++++++- util.c | 3 +++ util.h | 3 +++ 9 files changed, 103 insertions(+), 9 deletions(-) -- 2.43.0