[PATCH v3 00/13] Manage more flow related things from generic flow code

[David Gibson <david@gibson.dropbear.id.au>]

There are a number of things that are more-or-less general to flows
which are still explicitly handled in tcp.c and tcp_splice.c including
allocation and freeing of flow entries, and dispatch of deferred and
timer functions.

Even without adding more fields to the common flow structure, we can
handle a number of these in a more flow-centric way.

Unlike v1 this version is based on the hash table rework series.

Changes since v2:
 * Realised the prealloc/commit functions where confusing and worked
   poorly for some future stuff.  Replaced with alloc/alloc_cancel
 * Fixed a bug where newly allocated flow entries might not be
   0-filled, because of the free tracking information in there.  This
   could cause very subtle problems.
Changes since v1:
 * Store the timestamp of last flow timers run in a global, rather
   than a ctx field
 * Rebased on the TCP hash table rework
 * Add patches 9..13/13 with changes to allocation and freeing of flow
   entries.

David Gibson (13):
  flow: Make flow_table.h #include the protocol specific headers it
    needs
  treewide: Standardise on 'now' for current timestamp variables
  tcp, tcp_splice: Remove redundant handling from tcp_timer()
  tcp, tcp_splice: Move per-type cleanup logic into per-type helpers
  flow, tcp: Add flow-centric dispatch for deferred flow handling
  flow, tcp: Add handling for per-flow timers
  epoll: Better handling of number of epoll types
  tcp, tcp_splice: Avoid double layered dispatch for connected TCP
    sockets
  flow: Move flow_log_() to near top of flow.c
  flow: Move flow_count from context structure to a global
  flow: Abstract allocation of new flows with helper function
  flow: Enforce that freeing of closed flows must happen in deferred
    handlers
  flow: Avoid moving flow entries to compact table

 flow.c       | 223 ++++++++++++++++++++++++++++++++++++++++++---------
 flow.h       |   5 +-
 flow_table.h |  20 +++++
 icmp.c       |  12 +--
 icmp.h       |   2 +-
 log.c        |  34 ++++----
 passt.c      |  20 +++--
 passt.h      |   9 +--
 tcp.c        | 143 +++++++++------------------------
 tcp.h        |   2 +-
 tcp_conn.h   |   8 +-
 tcp_splice.c |  49 +++++------
 tcp_splice.h |   4 +-
 udp.c        |  16 ++--
 udp.h        |   2 +-
 15 files changed, 324 insertions(+), 225 deletions(-)

-- 
2.43.0