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: 20260520095526.21519-1-lvivier@redhat.com v7: - Use initializers for struct tcphdr - Rename reused 'payload' variable to 'l2frame' - Fix vu_pad() double-offset bug in tcp_vu_data_from_sock() - Remove redundant *elem_used = 0 before truncation loop - Add missing @vnlen to tcp_vu_send_dup() doc comment v6: - Rebase on v8 of UDP series (tcp_update_csum() takes dlen rather than l4len) v5: - Use l2len variable for pcap_iov() length in tcp_vu_send_flag() - Add braces - Move pcap_iov() before vu_flush() - Remove vu_flush() from tcp_vu_send_dup(), let the caller handle it v4: - fix error during rebase, s/vu_pad_len/vu_pad/ 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 | 409 +++++++++++++++++++++++++++++-------------------- vu_common.h | 20 --- 6 files changed, 272 insertions(+), 213 deletions(-) -- 2.54.0