This series introduces iov_tail to convey frame information between functions. This is only an API change, for the moment the memory pool is only able to store contiguous buffer, so, except for vhost-user in a special case, we only play with iovec array with only one entry. v7: - Add a patch to fix comment style of 'Return:' - Fix ignore_arp()/accept_arp() - Fix coverity error - Fix several comments v6: - Replaced iov_slice() with the clearer iov_tail_clone() for creating iovec subsets. - Standardized local header variable names (to *_storage suffix). - Renamed functions for better semantics (e.g., ignore_arp to accept_arp, packet_data to packet_get). - Corrected OPTLEN_MAX definition in TCP. - Addressed minor logic issues (e.g., DHCPv6 FQDN flags, NDP null check). - Updated ipv6_l4hdr() return type to boolean. - Improved comments and documentation across several modules. v5: - store in the pool iovec array with several entries v4: Prepare to introduce iovec array in the pool: - passe iov_tail rather than pool to ndp,icmp, dhcp, dhcpv6 and arp - remove unused pool macros - add memory regions in the pool structure, this will allow us to use the buf pointer to store the iovec array for vhost-user v3: Address comments from David Laurent Vivier (31): style: Fix 'Return' comment style arp: Don't mix incoming and outgoing buffers iov: Introduce iov_tail_clone() and iov_tail_drop(). iov: Update IOV_REMOVE_HEADER() and IOV_PEEK_HEADER() tap: Use iov_tail with tap_add_packet() packet: Use iov_tail with packet_add() packet: Add packet_data() arp: Convert to iov_tail ndp: Convert to iov_tail icmp: Convert to iov_tail udp: Convert to iov_tail tcp: Convert tcp_tap_handler() to use iov_tail tcp: Convert tcp_data_from_tap() to use iov_tail dhcpv6: move offset initialization out of dhcpv6_opt() dhcpv6: Extract sending of NotOnLink status dhcpv6: Convert to iov_tail dhcpv6: Use iov_tail in dhcpv6_opt() dhcp: Convert to iov_tail ip: Use iov_tail in ipv6_l4hdr() tap: Convert tap4_handler() to iov_tail tap: Convert tap6_handler() to iov_tail packet: rename packet_data() to packet_get() arp: use iov_tail rather than pool dhcp: use iov_tail rather than pool dhcpv6: use iov_tail rather than pool icmp: use iov_tail rather than pool ndp: use iov_tail rather than pool packet: remove PACKET_POOL() and PACKET_POOL_P() packet: remove unused parameter from PACKET_POOL_DECL() packet: add memory regions information into pool packet: use buf to store iovec array arp.c | 86 ++++++++++++------- arp.h | 2 +- checksum.c | 4 +- conf.c | 12 +-- dhcp.c | 48 ++++++----- dhcp.h | 2 +- dhcpv6.c | 223 +++++++++++++++++++++++++++++++------------------- dhcpv6.h | 2 +- flow.c | 4 +- flow_table.h | 2 +- icmp.c | 43 ++++++---- icmp.h | 2 +- inany.c | 4 +- iov.c | 118 ++++++++++++++++++++++---- iov.h | 58 +++++++++---- ip.c | 32 ++++---- ip.h | 3 +- lineread.c | 2 +- ndp.c | 16 +++- ndp.h | 4 +- packet.c | 227 ++++++++++++++++++++++++++++++++++++++------------- packet.h | 57 ++++++------- pcap.c | 1 + tap.c | 134 +++++++++++++++++------------- tap.h | 8 +- tcp.c | 67 ++++++++++----- tcp_buf.c | 2 +- tcp_splice.c | 4 +- tcp_vu.c | 4 +- udp.c | 37 ++++++--- udp_vu.c | 6 +- util.c | 6 +- util.h | 4 +- vhost_user.c | 72 ++++++++-------- virtio.c | 6 +- virtio.h | 24 ++++-- vu_common.c | 48 ++++------- 37 files changed, 870 insertions(+), 504 deletions(-) -- 2.49.0