[PATCH v4 00/28] Introduce discontiguous frames management

[Laurent Vivier <lvivier@redhat.com>]

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.

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 (28):
  arp: Don't mix incoming and outgoing buffers
  iov: Introduce iov_slice(), iov_tail_slice() 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
  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

 arp.c        |  86 +++++++++++++-------
 arp.h        |   2 +-
 dhcp.c       |  47 ++++++-----
 dhcp.h       |   2 +-
 dhcpv6.c     | 223 +++++++++++++++++++++++++++++++--------------------
 dhcpv6.h     |   2 +-
 icmp.c       |  41 ++++++----
 icmp.h       |   2 +-
 iov.c        | 142 +++++++++++++++++++++++++++++---
 iov.h        |  59 ++++++++++----
 ip.c         |  27 +++----
 ip.h         |   3 +-
 ndp.c        |  13 ++-
 ndp.h        |   4 +-
 packet.c     |  88 ++++++++------------
 packet.h     |  52 ++++++------
 pcap.c       |   1 +
 tap.c        | 132 +++++++++++++++++-------------
 tap.h        |   5 +-
 tcp.c        |  61 +++++++++-----
 tcp_buf.c    |   2 +-
 udp.c        |  34 +++++---
 vhost_user.c |  28 +++----
 virtio.c     |   4 +-
 virtio.h     |   8 +-
 vu_common.c  |  46 ++++-------
 26 files changed, 690 insertions(+), 424 deletions(-)

-- 
2.49.0