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* netfilter: ipset: Fix cidr handling for hash:*net* typesJozsef Kadlecsik2015-06-147-34/+42
| | | | | | | | | | | Commit "Simplify cidr handling for hash:*net* types" broke the cidr handling for the hash:*net* types when the sets were used by the SET target: entries with invalid cidr values were added to the sets. Reported by Jonathan Johnson. Testsuite entry is added to verify the fix. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: ipset: Check CIDR value only when attribute is givenSergey Popovich2015-06-144-49/+41Star
| | | | | | | | | | | | | | | | There is no reason to check CIDR value regardless attribute specifying CIDR is given. Initialize cidr array in element structure on element structure declaration to let more freedom to the compiler to optimize initialization right before element structure is used. Remove local variables cidr and cidr2 for netnet and netportnet hashes as we do not use packed cidr value for such set types and can store value directly in e.cidr[]. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: ipset: Make sure we always return line number on batchSergey Popovich2015-06-1415-75/+75
| | | | | | | | | | | | Even if we return with generic IPSET_ERR_PROTOCOL it is good idea to return line number if we called in batch mode. Moreover we are not always exiting with IPSET_ERR_PROTOCOL. For example hash:ip,port,net may return IPSET_ERR_HASH_RANGE_UNSUPPORTED or IPSET_ERR_INVALID_CIDR. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: ipset: Permit CIDR equal to the host address CIDR in IPv6Sergey Popovich2015-06-145-15/+43
| | | | | | | | | | | | | Permit userspace to supply CIDR length equal to the host address CIDR length in netlink message. Prohibit any other CIDR length for IPv6 variant of the set. Also return -IPSET_ERR_HASH_RANGE_UNSUPPORTED instead of generic -IPSET_ERR_PROTOCOL in IPv6 variant of hash:ip,port,net when IPSET_ATTR_IP_TO attribute is given. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: ipset: Check extensions attributes before getting extensions.Sergey Popovich2015-06-1416-170/+29Star
| | | | | | | | Make all extensions attributes checks within ip_set_get_extensions() and reduce number of duplicated code. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: ipset: Use SET_WITH_*() helpers to test set extensionsSergey Popovich2015-06-142-7/+7
| | | | | Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
* netfilter: xtables: avoid percpu ruleset duplicationFlorian Westphal2015-06-121-15/+8Star
| | | | | | | | | | | | | | | | | | | We store the rule blob per (possible) cpu. Unfortunately this means we can waste lot of memory on big smp machines. ipt_entry structure ('rule head') is 112 byte, so e.g. with maxcpu=64 one single rule eats close to 8k RAM. Since previous patch made counters percpu it appears there is nothing left in the rule blob that needs to be percpu. On my test system (144 possible cpus, 400k dummy rules) this change saves close to 9 Gigabyte of RAM. Reported-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* netfilter: conntrack: warn the user if there is a better helper to useMarcelo Ricardo Leitner2015-06-121-1/+7
| | | | | | | | | | | | | | | | | After db29a9508a92 ("netfilter: conntrack: disable generic tracking for known protocols"), if the specific helper is built but not loaded (a standard for most distributions) systems with a restrictive firewall but weak configuration regarding netfilter modules to load, will silently stop working. This patch then puts a warning message so the sysadmin knows where to start looking into. It's a pr_warn_once regardless of protocol itself but it should be enough to give a hint on where to look. Cc: Florian Westphal <fw@strlen.de> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2015-05-314-5/+231
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next, they are: 1) default CONFIG_NETFILTER_INGRESS to y for easier compile-testing of all options. 2) Allow to bind a table to net_device. This introduces the internal NFT_AF_NEEDS_DEV flag to perform a mandatory check for this binding. This is required by the next patch. 3) Add the 'netdev' table family, this new table allows you to create ingress filter basechains. This provides access to the existing nf_tables features from ingress. 4) Kill unused argument from compat_find_calc_{match,target} in ip_tables and ip6_tables, from Florian Westphal. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: nf_tables: add netdev table to filter from ingressPablo Neira Ayuso2015-05-263-0/+189
| | | | | | | | | | | | | | | | | | | | This allows us to create netdev tables that contain ingress chains. Use skb_header_pointer() as we may see shared sk_buffs at this stage. This change provides access to the existing nf_tables features from the ingress hook. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * netfilter: nf_tables: allow to bind table to net_devicePablo Neira Ayuso2015-05-261-5/+41
| | | | | | | | | | | | | | | | | | | | This patch adds the internal NFT_AF_NEEDS_DEV flag to indicate that you must attach this table to a net_device. This change is required by the follow up patch that introduces the new netdev table. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * netfilter: default CONFIG_NETFILTER_INGRESS to yPablo Neira Ayuso2015-05-261-0/+1
| | | | | | | | | | | | | | Useful to compile-test all options. Suggested-by: Alexei Stavoroitov <ast@plumgrid.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | ipv6: Set FLOWI_FLAG_KNOWN_NH at flowi6_flagsMartin KaFai Lau2015-05-252-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The neighbor look-up used to depend on the rt6i_gateway (if there is a gateway) or the rt6i_dst (if it is a RTF_CACHE clone) as the nexthop address. Note that rt6i_dst is set to fl6->daddr for the RTF_CACHE clone where fl6->daddr is the one used to do the route look-up. Now, we only create RTF_CACHE clone after encountering exception. When doing the neighbor look-up with a route that is neither a gateway nor a RTF_CACHE clone, the daddr in skb will be used as the nexthop. In some cases, the daddr in skb is not the one used to do the route look-up. One example is in ip_vs_dr_xmit_v6() where the real nexthop server address is different from the one in the skb. This patch is going to follow the IPv4 approach and ask the ip6_pol_route() callers to set the FLOWI_FLAG_KNOWN_NH properly. In the next patch, ip6_pol_route() will honor the FLOWI_FLAG_KNOWN_NH and create a RTF_CACHE clone. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Julian Anastasov <ja@ssi.bg> Tested-by: Julian Anastasov <ja@ssi.bg> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: Add rt6_get_cookie() functionMartin KaFai Lau2015-05-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Instead of doing the rt6->rt6i_node check whenever we need to get the route's cookie. Refactor it into rt6_get_cookie(). It is a prep work to handle FLOWI_FLAG_KNOWN_NH and also percpu rt6_info later. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCASTMartin KaFai Lau2015-05-252-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When creating a RTF_CACHE route, RTF_ANYCAST is set based on rt6i_dst. Also, rt6i_gateway is always set to the nexthop while the nexthop could be a gateway or the rt6i_dst.addr. After removing the rt6i_dst and rt6i_src dependency in the last patch, we also need to stop the caller from depending on rt6i_gateway and RTF_ANYCAST. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: Remove external dependency on rt6i_dst and rt6i_srcMartin KaFai Lau2015-05-251-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the assumptions that the returned rt is always a RTF_CACHE entry with the rt6i_dst and rt6i_src containing the destination and source address. The dst and src can be recovered from the calling site. We may consider to rename (rt6i_dst, rt6i_src) to (rt6i_key_dst, rt6i_key_src) later. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2015-05-236-23/+58
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/ethernet/cadence/macb.c drivers/net/phy/phy.c include/linux/skbuff.h net/ipv4/tcp.c net/switchdev/switchdev.c Switchdev was a case of RTNH_H_{EXTERNAL --> OFFLOAD} renaming overlapping with net-next changes of various sorts. phy.c was a case of two changes, one adding a local variable to a function whilst the second was removing one. tcp.c overlapped a deadlock fix with the addition of new tcp_info statistic values. macb.c involved the addition of two zyncq device entries. skbuff.h involved adding back ipv4_daddr to nf_bridge_info whilst net-next changes put two other existing members of that struct into a union. Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: nfnetlink_{log,queue}: Register pernet in first placeFrancesco Ruggeri2015-05-202-18/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nfnetlink_{log,queue}_init() register the netlink callback nf*_rcv_nl_event before registering the pernet_subsys, but the callback relies on data structures allocated by pernet init functions. When nfnetlink_{log,queue} is loaded, if a netlink message is received after the netlink callback is registered but before the pernet_subsys is registered, the kernel will panic in the sequence nfulnl_rcv_nl_event nfnl_log_pernet net_generic BUG_ON(id == 0) where id is nfnl_log_net_id. The panic can be easily reproduced in 4.0.3 by: while true ;do modprobe nfnetlink_log ; rmmod nfnetlink_log ; done & while true ;do ip netns add dummy ; ip netns del dummy ; done & This patch moves register_pernet_subsys to earlier in nfnetlink_log_init. Notice that the BUG_ON hit in 4.0.3 was recently removed in 2591ffd308 ["netns: remove BUG_ONs from net_generic()"]. Signed-off-by: Francesco Ruggeri <fruggeri@arista.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * netfilter: nf_tables: fix bogus warning in nft_data_uninit()Mirek Kratochvil2015-05-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The values 0x00000000-0xfffffeff are reserved for userspace datatype. When, deleting set elements with maps, a bogus warning is triggered. WARNING: CPU: 0 PID: 11133 at net/netfilter/nf_tables_api.c:4481 nft_data_uninit+0x35/0x40 [nf_tables]() This fixes the check accordingly to enum definition in include/linux/netfilter/nf_tables.h Fixes: https://bugzilla.netfilter.org/show_bug.cgi?id=1013 Signed-off-by: Mirek Kratochvil <exa.exa@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * conntrack: RFC5961 challenge ACK confuse conntrack LAST-ACK transitionJesper Dangaard Brouer2015-05-151-3/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In compliance with RFC5961, the network stack send challenge ACK in response to spurious SYN packets, since commit 0c228e833c88 ("tcp: Restore RFC5961-compliant behavior for SYN packets"). This pose a problem for netfilter conntrack in state LAST_ACK, because this challenge ACK is (falsely) seen as ACKing last FIN, causing a false state transition (into TIME_WAIT). The challenge ACK is hard to distinguish from real last ACK. Thus, solution introduce a flag that tracks the potential for seeing a challenge ACK, in case a SYN packet is let through and current state is LAST_ACK. When conntrack transition LAST_ACK to TIME_WAIT happens, this flag is used for determining if we are expecting a challenge ACK. Scapy based reproducer script avail here: https://github.com/netoptimizer/network-testing/blob/master/scapy/tcp_hacks_3WHS_LAST_ACK.py Fixes: 0c228e833c88 ("tcp: Restore RFC5961-compliant behavior for SYN packets") Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * netfilter: avoid build error if TPROXY/SOCKET=y && NF_DEFRAG_IPV6=mFlorian Westphal2015-05-151-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With TPROXY=y but DEFRAG_IPV6=m we get build failure: net/built-in.o: In function `tproxy_tg_init': net/netfilter/xt_TPROXY.c:588: undefined reference to `nf_defrag_ipv6_enable' If DEFRAG_IPV6 is modular, TPROXY must be too. (or both must be builtin). This enforces =m for both. Reported-and-tested-by: Liu Hua <liusdu@126.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * ipvs: fix memory leak in ip_vs_ctl.cTommi Rantala2015-05-081-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix memory leak introduced in commit a0840e2e165a ("IPVS: netns, ip_vs_ctl local vars moved to ipvs struct."): unreferenced object 0xffff88005785b800 (size 2048): comm "(-localed)", pid 1434, jiffies 4294755650 (age 1421.089s) hex dump (first 32 bytes): bb 89 0b 83 ff ff ff ff b0 78 f0 4e 00 88 ff ff .........x.N.... 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8262ea8e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff811fba74>] __kmalloc_track_caller+0x244/0x430 [<ffffffff811b88a0>] kmemdup+0x20/0x50 [<ffffffff823276b7>] ip_vs_control_net_init+0x1f7/0x510 [<ffffffff8231d630>] __ip_vs_init+0x100/0x250 [<ffffffff822363a1>] ops_init+0x41/0x190 [<ffffffff82236583>] setup_net+0x93/0x150 [<ffffffff82236cc2>] copy_net_ns+0x82/0x140 [<ffffffff810ab13d>] create_new_namespaces+0xfd/0x190 [<ffffffff810ab49a>] unshare_nsproxy_namespaces+0x5a/0xc0 [<ffffffff810833e3>] SyS_unshare+0x173/0x310 [<ffffffff8265cbd7>] system_call_fastpath+0x12/0x6f [<ffffffffffffffff>] 0xffffffffffffffff Fixes: a0840e2e165a ("IPVS: netns, ip_vs_ctl local vars moved to ipvs struct.") Signed-off-by: Tommi Rantala <tt.rantala@gmail.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2015-05-1824-231/+307
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next. Briefly speaking, cleanups and minor fixes for ipset from Jozsef Kadlecsik and Serget Popovich, more incremental updates to make br_netfilter a better place from Florian Westphal, ARP support to the x_tables mark match / target from and context Zhang Chunyu and the addition of context to know that the x_tables runs through nft_compat. More specifically, they are: 1) Fix sparse warning in ipset/ip_set_hash_ipmark.c when fetching the IPSET_ATTR_MARK netlink attribute, from Jozsef Kadlecsik. 2) Rename STREQ macro to STRNCMP in ipset, also from Jozsef. 3) Use skb->network_header to calculate the transport offset in ip_set_get_ip{4,6}_port(). From Alexander Drozdov. 4) Reduce memory consumption per element due to size miscalculation, this patch and follow up patches from Sergey Popovich. 5) Expand nomatch field from 1 bit to 8 bits to allow to simplify mtype_data_reset_flags(), also from Sergey. 6) Small clean for ipset macro trickery. 7) Fix error reporting when both ip_set_get_hostipaddr4() and ip_set_get_extensions() from per-set uadt functions. 8) Simplify IPSET_ATTR_PORT netlink attribute validation. 9) Introduce HOST_MASK instead of hardcoded 32 in ipset. 10) Return true/false instead of 0/1 in functions that return boolean in the ipset code. 11) Validate maximum length of the IPSET_ATTR_COMMENT netlink attribute. 12) Allow to dereference from ext_*() ipset macros. 13) Get rid of incorrect definitions of HKEY_DATALEN. 14) Include linux/netfilter/ipset/ip_set.h in the x_tables set match. 15) Reduce nf_bridge_info size in br_netfilter, from Florian Westphal. 16) Release nf_bridge_info after POSTROUTING since this is only needed from the physdev match, also from Florian. 17) Reduce size of ipset code by deinlining ip_set_put_extensions(), from Denys Vlasenko. 18) Oneliner to add ARP support to the x_tables mark match/target, from Zhang Chunyu. 19) Add context to know if the x_tables extension runs from nft_compat, to address minor problems with three existing extensions. 20) Correct return value in several seqfile *_show() functions in the netfilter tree, from Joe Perches. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | netfilter: Use correct return for seq_show functionsJoe Perches2015-05-172-13/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using seq_has_overflowed doesn't produce the right return value. Either 0 or -1 is, but 0 is much more common and works well when seq allocation retries. I believe this doesn't matter as the initial allocation is always sufficient, this is just a correctness patch. Miscellanea: o Don't use strlen, use *ptr to determine if a string should be emitted like all the other tests here o Delete unnecessary return statements Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: x_tables: add context to know if extension runs from nft_compatPablo Neira Ayuso2015-05-152-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we have four xtables extensions that cannot be used from the xt over nft compat layer. The problem is that they need real access to the full blown xt_entry to validate that the rule comes with the right dependencies. This check was introduced to overcome the lack of sufficient userspace dependency validation in iptables. To resolve this problem, this patch introduces a new field to the xt_tgchk_param structure that tell us if the extension is run from nft_compat context. The three affected extensions are: 1) CLUSTERIP, this target has been superseded by xt_cluster. So just bail out by returning -EINVAL. 2) TCPMSS. Relax the checking when used from nft_compat. If used with the wrong configuration, it will corrupt !syn packets by adding TCP MSS option. 3) ebt_stp. Relax the check to make sure it uses the reserved destination MAC address for STP. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Tested-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
| * | netfilter: xt_MARK: Add ARP supportZhang Chunyu2015-05-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add arpt_MARK to xt_mark. The corresponding userspace update is available at: http://git.netfilter.org/arptables/commit/?id=4bb2f8340783fd3a3f70aa6f8807428a280f8474 Signed-off-by: Zhang Chunyu <zhangcy@cn.fujitsu.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: deinline ip_set_put_extensions()Denys Vlasenko2015-05-141-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On x86 allyesconfig build: The function compiles to 489 bytes of machine code. It has 25 callsites. text data bss dec hex filename 82441375 22255384 20627456 125324215 7784bb7 vmlinux.before 82434909 22255384 20627456 125317749 7783275 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> CC: Eric W. Biederman <ebiederm@xmission.com> CC: David S. Miller <davem@davemloft.net> CC: Jan Engelhardt <jengelh@medozas.de> CC: Jiri Pirko <jpirko@redhat.com> CC: linux-kernel@vger.kernel.org CC: netdev@vger.kernel.org CC: netfilter-devel@vger.kernel.org Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Use better include files in xt_set.cJozsef Kadlecsik2015-05-131-1/+2
| | | | | | | | | | | | | | | Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Improve preprocessor macros checksSergey Popovich2015-05-133-7/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | Check if mandatory MTYPE, HTYPE and HOST_MASK macros defined. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Fix hashing for ipv6 setsSergey Popovich2015-05-135-8/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | HKEY_DATALEN remains defined after first inclusion of ip_set_hash_gen.h, so it is incorrectly reused for IPv6 code. Undefine HKEY_DATALEN in ip_set_hash_gen.h at the end. Also remove some useless defines of HKEY_DATALEN in ip_set_hash_{ip{,mark,port},netiface}.c as ip_set_hash_gen.h defines it correctly for such set types anyway. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Check for comment netlink attribute lengthSergey Popovich2015-05-1315-15/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure userspace supplies string not longer than IPSET_MAX_COMMENT_SIZE. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Return bool values instead of intSergey Popovich2015-05-1310-38/+43
| | | | | | | | | | | | | | | | | | Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Use HOST_MASK literal to represent host address CIDR lenSergey Popovich2015-05-137-9/+11
| | | | | | | | | | | | | | | | | | Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Check IPSET_ATTR_PORT only onceSergey Popovich2015-05-135-40/+10Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We do not need to check tb[IPSET_ATTR_PORT] != NULL before retrieving port, as this attribute is known to exist due to ip_set_attr_netorder() returning true only when attribute exists and it is in network byte order. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Return ipset error instead of boolSergey Popovich2015-05-1312-48/+126
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Statement ret = func1() || func2() returns 0 when both func1() and func2() return 0, or 1 if func1() or func2() returns non-zero. However in our case func1() and func2() returns error code on failure, so it seems good to propagate such error codes, rather than returning 1 in case of failure. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Preprocessor directices cleanupSergey Popovich2015-05-1312-34/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Undefine mtype_data_reset_elem before defining. * Remove duplicated mtype_gc_init undefine, move mtype_gc_init define closer to mtype_gc define. * Use htype instead of HTYPE in IPSET_TOKEN(HTYPE, _create)(). * Remove PF definition from sets: no more used. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: No need to make nomatch bitfieldSergey Popovich2015-05-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We do not store cidr packed with no match, so there is no need to make nomatch bitfield. This simplifies mtype_data_reset_flags() a bit. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Properly calculate extensions offsets and total lengthSergey Popovich2015-05-131-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Offsets and total length returned by the ip_set_elem_len() calculated incorrectly as initial set element length (i.e. len parameter) is used multiple times in offset calculations, also affecting set element total length. Use initial set element length as start offset, do not add aligned extension offset to the offset. Return offset as total length of the set element. This reduces memory requirements on per element basic for the hash:* type of sets. For example output from 'ipset -terse list test-1' on 64-bit PC, where test-1 is generated via following script: #!/bin/bash set_name='test-1' ipset create "$set_name" hash:net family inet \ timeout 10800 counters comment \ hashsize 65536 maxelem 65536 declare -i o3 o4 fmt="add $set_name 192.168.%u.%u\n" for ((o3 = 0; o3 < 256; o3++)); do for ((o4 = 0; o4 < 256; o4++)); do printf "$fmt" $o3 $o4 done done |ipset -exist restore BEFORE this patch is applied # ipset -terse list test-1 Name: test-1 Type: hash:net Revision: 6 Header: family inet hashsize 65536 maxelem 65536 timeout 10800 counters comment Size in memory: 26348440 and AFTER applying patch # ipset -terse list test-1 Name: test-1 Type: hash:net Revision: 6 Header: family inet hashsize 65536 maxelem 65536 timeout 10800 counters comment Size in memory: 7706392 References: 0 Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: make ip_set_get_ip*_port to use skb_network_offsetAlexander Drozdov2015-05-131-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All the ipset functions respect skb->network_header value, except for ip_set_get_ip4_port() & ip_set_get_ip6_port(). The functions should use skb_network_offset() to get the transport header offset. Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Give a better name to a macro in ip_set_core.cJozsef Kadlecsik2015-05-131-9/+9
| | | | | | | | | | | | | | | Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | netfilter: ipset: Fix sparse warningJozsef Kadlecsik2015-05-131-2/+2
| | | | | | | | | | | | | | | | | | | | | "warning: cast to restricted __be32" warnings are fixed Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | | netfilter: add netfilter ingress hook after handle_ing() under unique static keyPablo Neira2015-05-142-1/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the Netfilter ingress hook just after the existing tc ingress hook, that seems to be the consensus solution for this. Note that the Netfilter hook resides under the global static key that enables ingress filtering. Nonetheless, Netfilter still also has its own static key for minimal impact on the existing handle_ing(). * Without this patch: Result: OK: 6216490(c6216338+d152) usec, 100000000 (60byte,0frags) 16086246pps 7721Mb/sec (7721398080bps) errors: 100000000 42.46% kpktgend_0 [kernel.kallsyms] [k] __netif_receive_skb_core 25.92% kpktgend_0 [kernel.kallsyms] [k] kfree_skb 7.81% kpktgend_0 [pktgen] [k] pktgen_thread_worker 5.62% kpktgend_0 [kernel.kallsyms] [k] ip_rcv 2.70% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_internal 2.34% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_sk 1.44% kpktgend_0 [kernel.kallsyms] [k] __build_skb * With this patch: Result: OK: 6214833(c6214731+d101) usec, 100000000 (60byte,0frags) 16090536pps 7723Mb/sec (7723457280bps) errors: 100000000 41.23% kpktgend_0 [kernel.kallsyms] [k] __netif_receive_skb_core 26.57% kpktgend_0 [kernel.kallsyms] [k] kfree_skb 7.72% kpktgend_0 [pktgen] [k] pktgen_thread_worker 5.55% kpktgend_0 [kernel.kallsyms] [k] ip_rcv 2.78% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_internal 2.06% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_sk 1.43% kpktgend_0 [kernel.kallsyms] [k] __build_skb * Without this patch + tc ingress: tc filter add dev eth4 parent ffff: protocol ip prio 1 \ u32 match ip dst 4.3.2.1/32 Result: OK: 9269001(c9268821+d179) usec, 100000000 (60byte,0frags) 10788648pps 5178Mb/sec (5178551040bps) errors: 100000000 40.99% kpktgend_0 [kernel.kallsyms] [k] __netif_receive_skb_core 17.50% kpktgend_0 [kernel.kallsyms] [k] kfree_skb 11.77% kpktgend_0 [cls_u32] [k] u32_classify 5.62% kpktgend_0 [kernel.kallsyms] [k] tc_classify_compat 5.18% kpktgend_0 [pktgen] [k] pktgen_thread_worker 3.23% kpktgend_0 [kernel.kallsyms] [k] tc_classify 2.97% kpktgend_0 [kernel.kallsyms] [k] ip_rcv 1.83% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_internal 1.50% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_sk 0.99% kpktgend_0 [kernel.kallsyms] [k] __build_skb * With this patch + tc ingress: tc filter add dev eth4 parent ffff: protocol ip prio 1 \ u32 match ip dst 4.3.2.1/32 Result: OK: 9308218(c9308091+d126) usec, 100000000 (60byte,0frags) 10743194pps 5156Mb/sec (5156733120bps) errors: 100000000 42.01% kpktgend_0 [kernel.kallsyms] [k] __netif_receive_skb_core 17.78% kpktgend_0 [kernel.kallsyms] [k] kfree_skb 11.70% kpktgend_0 [cls_u32] [k] u32_classify 5.46% kpktgend_0 [kernel.kallsyms] [k] tc_classify_compat 5.16% kpktgend_0 [pktgen] [k] pktgen_thread_worker 2.98% kpktgend_0 [kernel.kallsyms] [k] ip_rcv 2.84% kpktgend_0 [kernel.kallsyms] [k] tc_classify 1.96% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_internal 1.57% kpktgend_0 [kernel.kallsyms] [k] netif_receive_skb_sk Note that the results are very similar before and after. I can see gcc gets the code under the ingress static key out of the hot path. Then, on that cold branch, it generates the code to accomodate the netfilter ingress static key. My explanation for this is that this reduces the pressure on the instruction cache for non-users as the new code is out of the hot path, and it comes with minimal impact for tc ingress users. Using gcc version 4.8.4 on: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 8 [...] L1d cache: 16K L1i cache: 64K L2 cache: 2048K L3 cache: 8192K Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | netfilter: add hook list to nf_hook_statePablo Neira2015-05-141-4/+2Star
|/ / | | | | | | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Modify sk_alloc to not reference count the netns of kernel sockets.Eric W. Biederman2015-05-111-21/+9Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that sk_alloc knows when a kernel socket is being allocated modify it to not reference count the network namespace of kernel sockets. Keep track of if a socket needs reference counting by adding a flag to struct sock called sk_net_refcnt. Update all of the callers of sock_create_kern to stop using sk_change_net and sk_release_kernel as those hacks are no longer needed, to avoid reference counting a kernel socket. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: Add a struct net parameter to sock_create_kernEric W. Biederman2015-05-111-2/+2
|/ | | | | | | | This is long overdue, and is part of cleaning up how we allocate kernel sockets that don't reference count struct net. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller2015-04-281-2/+1Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for your net tree, they are: 1) Fix a crash in nf_tables when dictionaries are used from the ruleset, due to memory corruption, from Florian Westphal. 2) Fix another crash in nf_queue when used with br_netfilter. Also from Florian. Both fixes are related to new stuff that got in 4.0-rc. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: nf_tables: fix wrong length for jump/goto verdictsFlorian Westphal2015-04-241-2/+1Star
| | | | | | | | | | | | | | | | | | | | NFT_JUMP/GOTO erronously sets length to sizeof(void *). We then allocate insufficient memory when such element is added to a vmap. Suggested-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | netfilter; Add some missing default cases to switch statements in nft_reject.David S. Miller2015-04-272-0/+4
|/ | | | | | | | | | | | | | | | | | | | This fixes: ==================== net/netfilter/nft_reject.c: In function ‘nft_reject_dump’: net/netfilter/nft_reject.c:61:2: warning: enumeration value ‘NFT_REJECT_TCP_RST’ not handled in switch [-Wswitch] switch (priv->type) { ^ net/netfilter/nft_reject.c:61:2: warning: enumeration value ‘NFT_REJECT_ICMPX_UNREACH’ not handled in switch [-Wswi\ tch] net/netfilter/nft_reject_inet.c: In function ‘nft_reject_inet_dump’: net/netfilter/nft_reject_inet.c:105:2: warning: enumeration value ‘NFT_REJECT_TCP_RST’ not handled in switch [-Wswi\ tch] switch (priv->type) { ^ ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2015-04-1523-497/+591
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pablo Neira Ayuso says: ==================== Netfilter updates for net-next A final pull request, I know it's very late but this time I think it's worth a bit of rush. The following patchset contains Netfilter/nf_tables updates for net-next, more specifically concatenation support and dynamic stateful expression instantiation. This also comes with a couple of small patches. One to fix the ebtables.h userspace header and another to get rid of an obsolete example file in tree that describes a nf_tables expression. This time, I decided to paste the original descriptions. This will result in a rather large commit description, but I think these bytes to keep. Patrick McHardy says: ==================== netfilter: nf_tables: concatenation support The following patches add support for concatenations, which allow multi dimensional exact matches in O(1). The basic idea is to split the data registers, currently consisting of 4 registers of 16 bytes each, into smaller units, 16 registers of 4 bytes each, and making sure each register store always leaves the full 32 bit in a well defined state, meaning smaller stores will zero the remaining bits. Based on that, we can load multiple adjacent registers with different values, thereby building a concatenated bigger value, and use that value for set lookups. Sets are changed to use variable sized extensions for their key and data values, removing the fixed limit of 16 bytes while saving memory if less space is needed. As a side effect, these patches will allow some nice optimizations in the future, like using jhash2 in nft_hash, removing the masking in nft_cmp_fast, optimized data comparison using 32 bit word size etc. These are not done so far however. The patches are split up as follows: * the first five patches add length validation to register loads and stores to make sure we stay within bounds and prepare the validation functions for the new addressing mode * the next patches prepare for changing to 32 bit addressing by introducing a struct nft_regs, which holds the verdict register as well as the data registers. The verdict members are moved to a new struct nft_verdict to allow to pull struct nft_data out of the stack. * the next patches contain preparatory conversions of expressions and sets to use 32 bit addressing * the next patch introduces so far unused register conversion helpers for parsing and dumping register numbers over netlink * following is the real conversion to 32 bit addressing, consisting of replacing struct nft_data in struct nft_regs by an array of u32s and actually translating and validating the new register numbers. * the final two patches add support for variable sized data items and variable sized keys / data in set elements The patches have been verified to work correctly with nft binaries using both old and new addressing. ==================== Patrick McHardy says: ==================== netfilter: nf_tables: dynamic stateful expression instantiation The following patches are the grand finale of my nf_tables set work, using all the building blocks put in place by the previous patches to support something like iptables hashlimit, but a lot more powerful. Sets are extended to allow attaching expressions to set elements. The dynset expression dynamically instantiates these expressions based on a template when creating new set elements and evaluates them for all new or updated set members. In combination with concatenations this effectively creates state tables for arbitrary combinations of keys, using the existing expression types to maintain that state. Regular set GC takes care of purging expired states. We currently support two different stateful expressions, counter and limit. Using limit as a template we can express the functionality of hashlimit, but completely unrestricted in the combination of keys. Using counter we can perform accounting for arbitrary flows. The following examples from patch 5/5 show some possibilities. Userspace syntax is still WIP, especially the listing of state tables will most likely be seperated from normal set listings and use a more structured format: 1. Limit the rate of new SSH connections per host, similar to iptables hashlimit: flow ip saddr timeout 60s \ limit 10/second \ accept 2. Account network traffic between each set of /24 networks: flow ip saddr & 255.255.255.0 . ip daddr & 255.255.255.0 \ counter 3. Account traffic to each host per user: flow skuid . ip daddr \ counter 4. Account traffic for each combination of source address and TCP flags: flow ip saddr . tcp flags \ counter The resulting set content after a Xmas-scan look like this: { 192.168.122.1 . fin | psh | urg : counter packets 1001 bytes 40040, 192.168.122.1 . ack : counter packets 74 bytes 3848, 192.168.122.1 . psh | ack : counter packets 35 bytes 3144 } In the future the "expressions attached to elements" will be extended to also support user created non-stateful expressions to allow to efficiently select beween a set of parameter sets, f.i. a set of log statements with different prefixes based on the interface, which currently require one rule each. This will most likely have to wait until the next kernel version though. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: nf_tables: get rid of the expression example codePablo Neira Ayuso2015-04-131-94/+0Star
| | | | | | | | | | | | | | | | There's an example net/netfilter/nft_expr_template.c example file in tree that got out of sync along time, remove it. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Acked-by: Patrick McHardy <kaber@trash.net>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-15 14:49:31 +0200