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  1. 27 9月, 2014 3 次提交
    • P
      netfilter: bridge: move br_netfilter out of the core · 34666d46
      由 Pablo Neira Ayuso 提交于 
      Jesper reported that br_netfilter always registers the hooks since
this is part of the bridge core. This harms performance for people that
don't need this.

This patch modularizes br_netfilter so it can be rmmod'ed, thus,
the hooks can be unregistered. I think the bridge netfilter should have
been a separated module since the beginning, Patrick agreed on that.

Note that this is breaking compatibility for users that expect that
bridge netfilter is going to be available after explicitly 'modprobe
bridge' or via automatic load through brctl.

However, the damage can be easily undone by modprobing br_netfilter.
The bridge core also spots a message to provide a clue to people that
didn't notice that this has been deprecated.

On top of that, the plan is that nftables will not rely on this software
layer, but integrate the connection tracking into the bridge layer to
enable stateful filtering and NAT, which is was bridge netfilter users
seem to require.

This patch still keeps the fake_dst_ops in the bridge core, since this
is required by when the bridge port is initialized. So we can safely
modprobe/rmmod br_netfilter anytime.
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
Acked-by: NFlorian Westphal <fw@strlen.de>
      34666d46
    • P
      netfilter: bridge: nf_bridge_copy_header as static inline in header · 7276ca3f
      由 Pablo Neira Ayuso 提交于 
      Move nf_bridge_copy_header() as static inline in netfilter_bridge.h
header file. This patch prepares the modularization of the br_netfilter
code.
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
      7276ca3f
    • R
      net/netfilter/x_tables.c: use __seq_open_private() · 772476df
      由 Rob Jones 提交于 
      Reduce boilerplate code by using __seq_open_private() instead of seq_open()
in xt_match_open() and xt_target_open().
Signed-off-by: NRob Jones <rob.jones@codethink.co.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
      772476df
  3. 19 9月, 2014 2 次提交
    • P
      netfilter: nf_tables: export rule-set generation ID · 84d7fce6
      由 Pablo Neira Ayuso 提交于 
      This patch exposes the ruleset generation ID in three ways:

1) The new command NFT_MSG_GETGEN that exposes the 32-bits ruleset
   generation ID. This ID is incremented in every commit and it
   should be large enough to avoid wraparound problems.

2) The less significant 16-bits of the generation ID are exposed through
   the nfgenmsg->res_id header field. This allows us to quickly catch
   if the ruleset has change between two consecutive list dumps from
   different object lists (in this specific case I think the risk of
   wraparound is unlikely).

3) Userspace subscribers may receive notifications of new rule-set
   generation after every commit. This also provides an alternative
   way to monitor the generation ID. If the events are lost, the
   userspace process hits a overrun error, so it knows that it is
   working with a stale ruleset anyway.

Patrick spotted that rule-set transformations in userspace may take
quite some time. In that case, it annotates the 32-bits generation ID
before fetching the rule-set, then:

1) it compares it to what we obtain after the transformation to
   make sure it is not working with a stale rule-set and no wraparound
   has ocurred.

2) it subscribes to ruleset notifications, so it can watch for new
   generation ID.

This is complementary to the NLM_F_DUMP_INTR approach, which allows
us to detect an interference in the middle one single list dumping.
There is no way to explicitly check that an interference has occurred
between two list dumps from the kernel, since it doesn't know how
many lists the userspace client is actually going to dump.
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
      84d7fce6
    • P
      netfilter: nfnetlink: use original skbuff when committing/aborting · fc04733a
      由 Pablo Neira Ayuso 提交于 
      This allows us to access the original content of the batch from
the commit and the abort paths.
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>
      fc04733a
  5. 18 9月, 2014 4 次提交
  7. 16 9月, 2014 20 次提交
  9. 12 9月, 2014 2 次提交
  11. 11 9月, 2014 9 次提交