kernel/linux.git/include/linux/netfilter.h, branch v4.9.14

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-09-25T21:34:19+00:00

Conflicts: net/netfilter/core.c net/netfilter/nf_tables_netdev.c Resolve two conflicts before pull request for David's net-next tree: 1) Between c73c24849011 ("netfilter: nf_tables_netdev: remove redundant ip_hdr assignment") from the net tree and commit ddc8b6027ad0 ("netfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()"). 2) Between e8bffe0cf964 ("net: Add _nf_(un)register_hooks symbols") and Aaron Conole's patches to replace list_head with single linked list. Signed-off-by: Pablo Neira Ayuso

netfilter: replace list_head with single linked list

2016-09-25T12:38:48+00:00

The netfilter hook list never uses the prev pointer, and so can be trimmed to be a simple singly-linked list. In addition to having a more light weight structure for hook traversal, struct net becomes 5568 bytes (down from 6400) and struct net_device becomes 2176 bytes (down from 2240). Signed-off-by: Aaron Conole Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso

netfilter: call nf_hook_state_init with rcu_read_lock held

2016-09-24T19:25:49+00:00

This makes things simpler because we can store the head of the list in the nf_state structure without worrying about concurrent add/delete of hook elements from the list. A future commit will make use of this to implement a simpler linked-list. Signed-off-by: Florian Westphal Signed-off-by: Aaron Conole Signed-off-by: Pablo Neira Ayuso

net: Add _nf_(un)register_hooks symbols

2016-09-19T05:25:22+00:00

Add _nf_register_hooks() and _nf_unregister_hooks() calls which allow caller to hold RTNL mutex. Signed-off-by: Mahesh Bandewar CC: Pablo Neira Ayuso Signed-off-by: David S. Miller

netfilter: don't call hooks unless needed

2016-03-02T19:05:26+00:00

With the previous patches in place, a netns nf_hook_list might be empty, even if e.g. init_net performs filtering. Thus change nf_hook_thresh to check the hook_list as well before initializing hook_state and calling nf_hook_slow(). We still make use of static keys; if no netfilter modules are loaded list is guaranteed to be empty. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso

netfilter: turn NF_HOOK into an inline function

2015-10-16T16:45:36+00:00

A recent change to the dst_output handling caused a new warning when the call to NF_HOOK() is the only used of a local variable passed as 'dev', and CONFIG_NETFILTER is disabled: net/ipv6/ip6_output.c: In function 'ip6_output': net/ipv6/ip6_output.c:135:21: warning: unused variable 'dev' [-Wunused-variable] The reason for this is that the NF_HOOK macro in this case does not reference the variable at all, and the call to dev_net(dev) got removed from the ip6_output function. To avoid that warning now and in the future, this changes the macro into an equivalent inline function, which tells the compiler that the variable is passed correctly but still unused. The dn_forward function apparently had the same problem in the past and added a local workaround that no longer works with the inline function. In order to avoid a regression, we have to also remove the #ifdef from decnet in the same patch. Fixes: ede2059dbaf9 ("dst: Pass net into dst->output") Signed-off-by: Arnd Bergmann Signed-off-by: Pablo Neira Ayuso

netfilter: remove hook owner refcounting

2015-10-16T16:21:39+00:00

since commit 8405a8fff3f8 ("netfilter: nf_qeueue: Drop queue entries on nf_unregister_hook") all pending queued entries are discarded. So we can simply remove all of the owner handling -- when module is removed it also needs to unregister all its hooks. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso

netfilter: ctnetlink: add const qualifier to nfnl_hook.get_ct

2015-10-05T15:32:13+00:00

get_ct as is and will not update its skb argument, and users of nfnl_ct_hook is currently only nfqueue, we can add const qualifier. Signed-off-by: Ken-ichirou MATSUZAWA

netfilter: nfnetlink_queue: rename related to nfqueue attaching conntrack info

2015-10-05T15:32:11+00:00

The idea of this series of patch is to attach conntrack information to nflog like nfqueue has already done. nfqueue conntrack info attaching basis is generic, rename those names to generic one, glue. Signed-off-by: Ken-ichirou MATSUZAWA Signed-off-by: Pablo Neira Ayuso

netfilter: nfnetlink_queue: get rid of nfnetlink_queue_ct.c

2015-10-04T19:45:44+00:00

The original intention was to avoid dependencies between nfnetlink_queue and conntrack without ifdef pollution. However, we can achieve this by moving the conntrack dependent code into ctnetlink and keep some glue code to access the nfq_ct indirection from nfqueue. After this patch, the nfq_ct indirection is always compiled in the netfilter core to avoid polluting nfqueue with ifdefs. Thus, if nf_conntrack is not compiled this results in only 8-bytes of memory waste in x86_64. This patch also adds ctnetlink_nfqueue_seqadj() to avoid that the nf_conn structure layout if exposed to nf_queue, which creates another dependency with nf_conntrack at compilation time. Signed-off-by: Pablo Neira Ayuso