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20a69341f2
linux/net/netfilter
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Patrick McHardy 20a69341f2 netfilter: nf_tables: add netlink set API 
This patch adds the new netlink API for maintaining nf_tables sets
independently of the ruleset. The API supports the following operations:

- creation of sets
- deletion of sets
- querying of specific sets
- dumping of all sets

- addition of set elements
- removal of set elements
- dumping of all set elements

Sets are identified by name, each table defines an individual namespace.
The name of a set may be allocated automatically, this is mostly useful
in combination with the NFT_SET_ANONYMOUS flag, which destroys a set
automatically once the last reference has been released.

Sets can be marked constant, meaning they're not allowed to change while
linked to a rule. This allows to perform lockless operation for set
types that would otherwise require locking.

Additionally, if the implementation supports it, sets can (as before) be
used as maps, associating a data value with each key (or range), by
specifying the NFT_SET_MAP flag and can be used for interval queries by
specifying the NFT_SET_INTERVAL flag.

Set elements are added and removed incrementally. All element operations
support batching, reducing netlink message and set lookup overhead.

The old "set" and "hash" expressions are replaced by a generic "lookup"
expression, which binds to the specified set. Userspace is not aware
of the actual set implementation used by the kernel anymore, all
configuration options are generic.

Currently the implementation selection logic is largely missing and the
kernel will simply use the first registered implementation supporting the
requested operation. Eventually, the plan is to have userspace supply a
description of the data characteristics and select the implementation
based on expected performance and memory use.

This patch includes the new 'lookup' expression to look up for element
matching in the set.

This patch includes kernel-doc descriptions for this set API and it
also includes the following fixes.

From Patrick McHardy:
* netfilter: nf_tables: fix set element data type in dumps
* netfilter: nf_tables: fix indentation of struct nft_set_elem comments
* netfilter: nf_tables: fix oops in nft_validate_data_load()
* netfilter: nf_tables: fix oops while listing sets of built-in tables
* netfilter: nf_tables: destroy anonymous sets immediately if binding fails
* netfilter: nf_tables: propagate context to set iter callback
* netfilter: nf_tables: add loop detection

From Pablo Neira Ayuso:
* netfilter: nf_tables: allow to dump all existing sets
* netfilter: nf_tables: fix wrong type for flags variable in newelem

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-10-14 17:16:07 +02:00
..
ipset netfilter: ipset: Add hash:net,port,net module to kernel. 2013-09-30 21:42:58 +02:00
ipvs netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
core.c netfilter: pass hook ops to hookfn 2013-10-14 11:29:31 +02:00
Kconfig netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
Makefile netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nf_conntrack_acct.c netfilter: nf_ct_acct: move initialization out of pernet_operations 2013-01-23 12:55:29 +01:00
nf_conntrack_amanda.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_broadcast.c
nf_conntrack_core.c netfilter: add SYNPROXY core/target 2013-08-28 00:27:54 +02:00
nf_conntrack_ecache.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_expect.c netfilter: ctnetlink: fix incorrect NAT expectation dumping 2013-07-15 11:14:51 +02:00
nf_conntrack_extend.c netfilter: nf_ct_ext: support variable length extensions 2012-06-16 15:08:49 +02:00
nf_conntrack_ftp.c netfilter: Implement RFC 1123 for FTP conntrack 2013-05-27 13:32:43 +02:00
nf_conntrack_h323_asn1.c netfilter: h323: bug in parsing of ASN1 SEQOF field 2011-04-04 15:21:02 +02:00
nf_conntrack_h323_main.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_irc.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_l3proto_generic.c
nf_conntrack_labels.c netfilter: connlabels: remove unneeded includes 2013-07-31 16:39:18 +02:00
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: ctnetlink: fix uninitialized variable 2013-08-28 00:28:19 +02:00
nf_conntrack_pptp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_proto_dccp.c netfilter: nf_log: prepare net namespace support for loggers 2013-04-05 20:12:54 +02:00
nf_conntrack_proto_generic.c netfilter: nf_conntrack: generalize nf_ct_l4proto_net 2012-07-04 19:37:22 +02:00
nf_conntrack_proto_gre.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_proto_sctp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_proto_tcp.c netfilter: add SYNPROXY core/target 2013-08-28 00:27:54 +02:00
nf_conntrack_proto_udp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_proto_udplite.c netfilter: nf_log: prepare net namespace support for loggers 2013-04-05 20:12:54 +02:00
nf_conntrack_proto.c netfilter: nf_conntrack: don't send destroy events from iterator 2013-08-09 12:03:33 +02:00
nf_conntrack_sane.c netfilter: nf_ct_helper: better logging for dropped packets 2013-02-19 02:48:05 +01:00
nf_conntrack_seqadj.c netfilter: add SYNPROXY core/target 2013-08-28 00:27:54 +02:00
nf_conntrack_sip.c netfilter: nf_ct_sip: consolidate NAT hook functions 2013-10-01 12:47:09 +02:00
nf_conntrack_snmp.c netfilter: nf_ct_snmp: add include file 2013-01-18 00:28:18 +01:00
nf_conntrack_standalone.c net: Convert uses of typedef ctl_table to struct ctl_table 2013-06-13 02:36:09 -07:00
nf_conntrack_tftp.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_conntrack_timeout.c netfilter: nf_ct_timeout: move initialization out of pernet_operations 2013-01-23 12:56:02 +01:00
nf_conntrack_timestamp.c netfilter: nf_ct_tstamp: move initialization out of pernet_operations 2013-01-23 12:55:39 +01:00
nf_internals.h netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_queue() 2012-09-03 13:52:54 +02:00
nf_log.c net: Convert uses of typedef ctl_table to struct ctl_table 2013-06-13 02:36:09 -07:00
nf_nat_amanda.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_nat_core.c netfilter: nf_nat: move alloc_null_binding to nf_nat_core.c 2013-10-14 11:29:39 +02:00
nf_nat_ftp.c netfilter: nf_ct_helper: better logging for dropped packets 2013-02-19 02:48:05 +01:00
nf_nat_helper.c netfilter: nf_conntrack: make sequence number adjustments usuable without NAT 2013-08-28 00:26:48 +02:00
nf_nat_irc.c netfilter: nf_ct_helper: better logging for dropped packets 2013-02-19 02:48:05 +01:00
nf_nat_proto_common.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_dccp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_sctp.c net/sctp: Refactor SCTP skb checksum computation 2013-07-27 20:07:15 -07:00
nf_nat_proto_tcp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_udp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_udplite.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_unknown.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_sip.c netfilter: nf_ct_sip: consolidate NAT hook functions 2013-10-01 12:47:09 +02:00
nf_nat_tftp.c netfilter: nf_ct_helper: better logging for dropped packets 2013-02-19 02:48:05 +01:00
nf_queue.c netfilter: move skb_gso_segment into nfnetlink_queue module 2013-04-29 20:09:05 +02:00
nf_sockopt.c
nf_synproxy_core.c netfilter: synproxy: fix BUG_ON triggered by corrupt TCP packets 2013-09-30 12:44:38 +02:00
nf_tables_api.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nf_tables_core.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nfnetlink_acct.c netfilter: nfnetlink_acct: fix incomplete dumping of objects 2013-06-05 12:36:36 +02:00
nfnetlink_cthelper.c netfilter: check return code from nla_parse_tested 2013-06-20 11:20:13 +02:00
nfnetlink_cttimeout.c netfilter: cttimeout: allow to set/get default protocol timeouts 2013-10-01 13:17:39 +02:00
nfnetlink_log.c netfilter: nfnetlink_log: use proper net to allocate skb 2013-10-01 12:46:56 +02:00
nfnetlink_queue_core.c netfilter: nfnetlink_queue: use proper net namespace to allocate skb 2013-10-01 12:20:31 +02:00
nfnetlink_queue_ct.c netfilter: nf_conntrack: make sequence number adjustments usuable without NAT 2013-08-28 00:26:48 +02:00
nfnetlink.c nfnetlink: add support for memory mapped netlink 2013-04-19 14:58:36 -04:00
nft_bitwise.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_byteorder.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_cmp.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_counter.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_ct.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_expr_template.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_exthdr.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_hash.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nft_immediate.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nft_limit.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_log.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_lookup.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
nft_meta_target.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_meta.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_payload.c netfilter: add nftables 2013-10-14 17:15:48 +02:00
nft_rbtree.c netfilter: nf_tables: add netlink set API 2013-10-14 17:16:07 +02:00
x_tables.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
xt_addrtype.c netfilter: xt_addrtype: fix trivial typo 2013-07-31 16:36:25 +02:00
xt_AUDIT.c netfilter: xt_AUDIT: only generate audit log when audit enabled 2013-03-04 14:45:25 +01:00
xt_bpf.c netfilter: x_tables: add xt_bpf match 2013-01-21 12:20:19 +01:00
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c
xt_comment.c
xt_connbytes.c Merge branch 'nf-next' of git://1984.lsi.us.es/net-next 2011-12-25 02:21:45 -05:00
xt_connlabel.c netfilter: add connlabel conntrack extension 2013-01-18 00:28:15 +01:00
xt_connlimit.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
xt_connmark.c
xt_CONNSECMARK.c
xt_conntrack.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
xt_cpu.c
xt_CT.c netfilter: xt_CT: optimize XT_CT_NOTRACK 2013-05-23 11:09:29 +02:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c netfilter: IPv6: fix DSCP mangle code 2011-05-10 10:00:21 +02:00
xt_ecn.c netfilter: xtables: collapse conditions in xt_ecn 2011-12-27 20:45:25 +01:00
xt_esp.c
xt_hashlimit.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
xt_helper.c
xt_hl.c netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_HL.c netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_HMARK.c ipv6: Move ipv6_find_hdr() out of Netfilter code. 2012-11-09 17:05:07 -08:00
xt_IDLETIMER.c netfilter: Remove unnecessary OOM logging messages 2011-11-01 09:19:49 +01:00
xt_iprange.c
xt_ipvs.c ipvs: API change to avoid rescan of IPv6 exthdr 2012-09-28 11:34:33 +09:00
xt_LED.c
xt_length.c
xt_limit.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
xt_LOG.c netfilter: xt_LOG: fix mark logging for IPv6 packets 2013-05-29 12:29:18 +02:00
xt_mac.c netfilter: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:18 -04:00
xt_mark.c
xt_multiport.c
xt_nat.c netfilter: xt_nat: fix incorrect hooks for SNAT and DNAT targets 2012-10-15 13:39:12 +02:00
xt_NETMAP.c netfilter: combine ipt_NETMAP and ip6t_NETMAP 2012-09-21 12:11:08 +02:00
xt_nfacct.c netfilter: xtables: add nfacct match to support extended accounting 2011-12-25 02:43:17 +01:00
xt_NFLOG.c netfilter: log: netns NULL ptr bug when calling from conntrack 2013-05-15 14:11:07 +02:00
xt_NFQUEUE.c netfilter: xt_NFQUEUE: coalesce IPv4 and IPv6 hashing 2013-04-02 01:26:10 +02:00
xt_osf.c netfilter: nf_log: prepare net namespace support for loggers 2013-04-05 20:12:54 +02:00
xt_owner.c userns: xt_owner: Add basic user namespace support. 2012-08-14 21:55:30 -07:00
xt_physdev.c
xt_pkttype.c
xt_policy.c
xt_quota.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_rateest.c net_sched: add 64bit rate estimators 2013-06-11 02:51:03 -07:00
xt_RATEEST.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
xt_realm.c
xt_recent.c proc: Supply PDE attribute setting accessor functions 2013-05-01 17:29:18 -04:00
xt_REDIRECT.c netfilter: combine ipt_REDIRECT and ip6t_REDIRECT 2012-09-21 12:12:05 +02:00
xt_repldata.h
xt_sctp.c
xt_SECMARK.c
xt_set.c netfiler: ipset: Add net namespace for ipset 2013-09-30 21:42:52 +02:00
xt_socket.c ipv6: make lookups simpler and faster 2013-10-09 00:01:25 -04:00
xt_state.c
xt_statistic.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_string.c
xt_tcpmss.c
xt_TCPMSS.c netfilter: xt_TCPMSS: lookup route from proper net namespace 2013-09-27 16:18:23 +02:00
xt_TCPOPTSTRIP.c netfilter: xt_TCPOPTSTRIP: fix possible off by one access 2013-08-01 11:45:15 +02:00
xt_tcpudp.c
xt_TEE.c net: pass info struct via netdevice notifier 2013-05-28 13:11:01 -07:00
xt_time.c netfilter: xt_time: add support to ignore day transition 2012-09-24 14:29:01 +02:00
xt_TPROXY.c ipv6: make lookups simpler and faster 2013-10-09 00:01:25 -04:00
xt_TRACE.c
xt_u32.c