This is the TCP counterpart to the UDP multi-iov series. It converts
the TCP vhost-user receive path from direct pointer arithmetic (via
vu_eth(), vu_ip(), etc.) to the iov_tail abstraction, removing the
assumption that all headers reside in a single contiguous buffer.
With this series applied, the TCP path correctly handles virtio-net
drivers that provide multiple buffers per virtqueue element (e.g. iPXE
provides the vnet header in the first buffer and the frame payload in a
second one), matching the support already present in the UDP path.
Based-on: 20260401192326.1783350-1-lvivier(a)redhat.com
v3:
- Rebased on top of
[PATCH 00/10] vhost-user: Preparatory series for multiple iovec entries per virtqueue element
v2:
- add "tcp: Encode checksum computation flags in a single parameter"
- remove IOV_PUT_HEADER()/with_header() and use IOV_PUSH_HEADER()
- don't use the iov_tail to provide the headers to the functions
Laurent Vivier (4):
tcp: Encode checksum computation flags in a single parameter
tcp_vu: Build headers on the stack and write them into the iovec
tcp_vu: Support multibuffer frames in tcp_vu_sock_recv()
tcp_vu: Support multibuffer frames in tcp_vu_send_flag()
iov.c | 1 -
tcp.c | 25 ++--
tcp_buf.c | 23 +--
tcp_internal.h | 7 +-
tcp_vu.c | 395 +++++++++++++++++++++++++++++--------------------
vu_common.h | 20 ---
6 files changed, 265 insertions(+), 206 deletions(-)
--
2.53.0