linux/include/net/netns, branch v4.19

ipv6: Add icmp_echo_ignore_all support for ICMPv6

2018-08-13T15:42:25Z

Preventing the kernel from responding to ICMP Echo Requests messages can be useful in several ways. The sysctl parameter 'icmp_echo_ignore_all' can be used to prevent the kernel from responding to IPv4 ICMP echo requests. For IPv6 pings, such a sysctl kernel parameter did not exist. Add the ability to prevent the kernel from responding to IPv6 ICMP echo requests through the use of the following sysctl parameter : /proc/sys/net/ipv6/icmp/echo_ignore_all. Update the documentation to reflect this change. Signed-off-by: Virgile Jarry Signed-off-by: David S. Miller

net: ipv4: Control SKB reprioritization after forwarding

2018-08-01T16:52:30Z

After IPv4 packets are forwarded, the priority of the corresponding SKB is updated according to the TOS field of IPv4 header. This overrides any prioritization done earlier by e.g. an skbedit action or ingress-qos-map defined at a vlan device. Such overriding may not always be desirable. Even if the packet ends up being routed, which implies this is an L3 network node, an administrator may wish to preserve whatever prioritization was done earlier on in the pipeline. Therefore introduce a sysctl that controls this behavior. Keep the default value at 1 to maintain backward-compatible behavior. Signed-off-by: Petr Machata Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller

netfilter: nf_tables: use dedicated mutex to guard transactions

2018-07-18T09:26:48Z

Continue to use nftnl subsys mutex to protect (un)registration of hook types, expressions and so on, but force batch operations to do their own locking. This allows distinct net namespaces to perform transactions in parallel. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso

Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net

2018-07-03T01:29:26Z

Simple overlapping changes in stmmac driver. Adjust skb_gro_flush_final_remcsum function signature to make GRO list changes in net-next, as per Stephen Rothwell's example merge resolution. Signed-off-by: David S. Miller

netns: get more entropy from net_hash_mix()

2018-06-23T01:59:56Z

struct net are effectively allocated from order-1 pages on x86, with one object per slab, meaning that the 13 low order bits of their addresses are zero. Once shifted by L1_CACHE_SHIFT, this leaves 7 zero-bits, meaning that net_hash_mix() does not help spreading objects on various hash tables. For example, TCP listen table has 32 buckets, meaning that all netns use the same bucket for port 80 or port 443. Signed-off-by: Eric Dumazet Reported-by: Maciej Żenczykowski Signed-off-by: David S. Miller

netfilter: ipv6: nf_defrag: reduce struct net memory waste

2018-06-18T12:13:25Z

It is a waste of memory to use a full "struct netns_sysctl_ipv6" while only one pointer is really used, considering netns_sysctl_ipv6 keeps growing. Also, since "struct netns_frags" has cache line alignment, it is better to move the frags_hdr pointer outside, otherwise we spend a full cache line for this pointer. This saves 192 bytes of memory per netns. Fixes: c038a767cd69 ("ipv6: add a new namespace for nf_conntrack_reasm") Signed-off-by: Eric Dumazet Signed-off-by: Pablo Neira Ayuso

netfilter: nf_tables: fix chain dependency validation

2018-06-01T07:46:22Z

The following ruleset: add table ip filter add chain ip filter input { type filter hook input priority 4; } add chain ip filter ap add rule ip filter input jump ap add rule ip filter ap masquerade results in a panic, because the masquerade extension should be rejected from the filter chain. The existing validation is missing a chain dependency check when the rule is added to the non-base chain. This patch fixes the problem by walking down the rules from the basechains, searching for either immediate or lookup expressions, then jumping to non-base chains and again walking down the rules to perform the expression validation, so we make sure the full ruleset graph is validated. This is done only once from the commit phase, in case of problem, we abort the transaction and perform fine grain validation for error reporting. This patch requires 003087911af2 ("netfilter: nfnetlink: allow commit to fail") to achieve this behaviour. This patch also adds a cleanup callback to nfnl batch interface to reset the validate state from the exit path. As a result of this patch, nf_tables_check_loops() doesn't use ->validate to check for loops, instead it just checks for immediate expressions. Reported-by: Taehee Yoo Signed-off-by: Pablo Neira Ayuso

Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

2018-05-23T20:37:11Z

Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for your net-next tree, they are: 1) Remove obsolete nf_log tracing from nf_tables, from Florian Westphal. 2) Add support for map lookups to numgen, random and hash expressions, from Laura Garcia. 3) Allow to register nat hooks for iptables and nftables at the same time. Patchset from Florian Westpha. 4) Timeout support for rbtree sets. 5) ip6_rpfilter works needs interface for link-local addresses, from Vincent Bernat. 6) Add nf_ct_hook and nf_nat_hook structures and use them. 7) Do not drop packets on packets raceing to insert conntrack entries into hashes, this is particularly a problem in nfqueue setups. 8) Address fallout from xt_osf separation to nf_osf, patches from Florian Westphal and Fernando Mancera. 9) Remove reference to struct nft_af_info, which doesn't exist anymore. From Taehee Yoo. This batch comes with is a conflict between 25fd386e0bc0 ("netfilter: core: add missing __rcu annotation") in your tree and 2c205dd3981f ("netfilter: add struct nf_nat_hook and use it") coming in this batch. This conflict can be solved by leaving the __rcu tag on __netfilter_net_init() - added by 25fd386e0bc0 - and remove all code related to nf_nat_decode_session_hook - which is gone after 2c205dd3981f, as described by: diff --cc net/netfilter/core.c index e0ae4aae96f5,206fb2c4c319..168af54db975 --- a/net/netfilter/core.c +++ b/net/netfilter/core.c @@@ -611,7 -580,13 +611,8 @@@ const struct nf_conntrack_zone nf_ct_zo EXPORT_SYMBOL_GPL(nf_ct_zone_dflt); #endif /* CONFIG_NF_CONNTRACK */ - static void __net_init __netfilter_net_init(struct nf_hook_entries **e, int max) -#ifdef CONFIG_NF_NAT_NEEDED -void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *); -EXPORT_SYMBOL(nf_nat_decode_session_hook); -#endif - + static void __net_init + __netfilter_net_init(struct nf_hook_entries __rcu **e, int max) { int h; I can also merge your net-next tree into nf-next, solve the conflict and resend the pull request if you prefer so. ==================== Signed-off-by: David S. Miller

netfilter: nf_tables: remove nft_af_info.

2018-05-23T10:16:25Z

The struct nft_af_info was removed. Signed-off-by: Taehee Yoo Signed-off-by: Pablo Neira Ayuso

tcp: add tcp_comp_sack_nr sysctl

2018-05-18T15:40:27Z

This per netns sysctl allows for TCP SACK compression fine-tuning. This limits number of SACK that can be compressed. Using 0 disables SACK compression. Signed-off-by: Eric Dumazet Acked-by: Neal Cardwell Signed-off-by: David S. Miller