On 02/20/2016 01:43 AM, Cong Wang wrote:
Currently tc actions are stored in a per-module hashtable,
therefore are visible to all network namespaces. This is
probably the last part of the tc subsystem which is not
aware of netns now. This patch makes them per-netns,
several tc action API's need to be adjusted for this.

The tc action API code is ugly due to historical reasons,
we need to refactor that code in the future.

Also this patch is on top of my other patch
"net_sched: fix memory leaks when rmmod tc action modules",
therefore should be applied after -net is merged into
net-next.

Cc: Jamal Hadi Salim <j...@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
  include/net/act_api.h    |  28 +++++---
  net/sched/act_api.c      |  88 ++++++++++-------------
  net/sched/act_bpf.c      |  71 +++++++++++++++++--
  net/sched/act_connmark.c |  73 +++++++++++++++++--
  net/sched/act_csum.c     |  78 +++++++++++++++++++--
  net/sched/act_gact.c     |  74 ++++++++++++++++++--
  net/sched/act_ipt.c      | 178 +++++++++++++++++++++++++++++++++++++++++++----
  net/sched/act_mirred.c   |  75 ++++++++++++++++++--
  net/sched/act_nat.c      |  73 +++++++++++++++++--
  net/sched/act_pedit.c    |  73 +++++++++++++++++--
  net/sched/act_police.c   |  69 ++++++++++++++++--
  net/sched/act_simple.c   |  76 ++++++++++++++++++--
  net/sched/act_skbedit.c  |  73 +++++++++++++++++--
  net/sched/act_vlan.c     |  73 +++++++++++++++++--
  14 files changed, 969 insertions(+), 133 deletions(-)

Thanks for working on this!

Do you see a way to reduce the code duplication needed across all
the action modules? I.e. that each of them now needs to register
a new per netns subsystem, etc. In other words, is there a way the
action API could be reworked to handle most of this in the tc core
framework instead?

Cheers,
Daniel

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