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linux/net/netfilter
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Pablo Neira Ayuso f2a6d76676 netfilter: nf_tables: add generation mask to tables 
This patch addresses two problems:

1) The netlink dump is inconsistent when interfering with an ongoing
   transaction update for several reasons:

1.a) We don't honor the internal NFT_TABLE_INACTIVE flag, and we should
     be skipping these inactive objects in the dump.

1.b) We perform speculative deletion during the preparation phase, that
     may result in skipping active objects.

1.c) The listing order changes, which generates noise when tracking
     incremental ruleset update via tools like git or our own
     testsuite.

2) We don't allow to add and to update the object in the same batch,
   eg. add table x; add table x { flags dormant\; }.

In order to resolve these problems:

1) If the user requests a deletion, the object becomes inactive in the
   next generation. Then, ignore objects that scheduled to be deleted
   from the lookup path, as they will be effectively removed in the
   next generation.

2) From the get/dump path, if the object is not currently active, we
   skip it.

3) Support 'add X -> update X' sequence from a transaction.

After this update, we obtain a consistent list as long as we stay
in the same generation. The userspace side can detect interferences
through the generation counter so it can restart the dumping.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-06-24 11:03:24 +02:00
..
ipset netfilter: ipset: fix race condition in ipset save, swap and delete 2016-03-28 17:57:45 +02:00
ipvs net: define gso types for IPx over IPv4 and IPv6 2016-05-20 18:03:15 -04:00
core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
Kconfig netfilter: tee: select NF_DUP_IPV6 unconditionally 2016-02-08 12:58:28 +01:00
Makefile netfilter: nf_tables: add forward expression to the netdev family 2016-01-04 17:48:38 +01:00
nf_conntrack_acct.c netfilter: Remove uses of seq_<foo> return values 2015-03-18 10:51:35 +01:00
nf_conntrack_amanda.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
nf_conntrack_broadcast.c
nf_conntrack_core.c netfilter: move zone info into struct nf_conn 2016-06-23 13:33:12 +02:00
nf_conntrack_ecache.c netfilter: conntrack: move expectation event helper to ecache.c 2016-04-12 23:01:57 +02:00
nf_conntrack_expect.c netfilter: conntrack: use a single expectation table for all namespaces 2016-05-06 11:50:01 +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: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_h323_asn1.c
nf_conntrack_h323_main.c ipv6: Remove external dependency on rt6i_gateway and RTF_ANYCAST 2015-05-25 13:25:33 -04:00
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: helper: avoid extra expectation iterations on unregister 2016-06-07 17:26:51 +02:00
nf_conntrack_irc.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_l3proto_generic.c netfilter: Convert print_tuple functions to return void 2014-11-05 14:10:33 -05:00
nf_conntrack_labels.c netfilter: connlabels: change nf_connlabels_get bit arg to 'highest used' 2016-04-18 20:39:48 +02:00
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: conntrack: use a single expectation table for all namespaces 2016-05-06 11:50:01 +02:00
nf_conntrack_pptp.c netfilter: nf_conntrack: push zone object into functions 2015-08-11 12:29:01 +02:00
nf_conntrack_proto.c netfilter: nf_conntrack: remove dead code 2014-01-03 23:41:37 +01:00
nf_conntrack_proto_dccp.c libnl: nla_put_be64(): align on a 64-bit area 2016-04-23 20:13:24 -04:00
nf_conntrack_proto_generic.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_gre.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
nf_conntrack_proto_sctp.c netfilter: conntrack: don't acquire lock during seq_printf 2016-04-19 20:26:25 +02:00
nf_conntrack_proto_tcp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-04-24 00:12:08 -04:00
nf_conntrack_proto_udp.c netfilter: conntrack: introduce clash resolution on insertion race 2016-05-05 16:39:50 +02:00
nf_conntrack_proto_udplite.c netfilter: conntrack: introduce clash resolution on insertion race 2016-05-05 16:39:50 +02:00
nf_conntrack_sane.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_seqadj.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_conntrack_sip.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_snmp.c netfilter: nf_ct_snmp: add include file 2013-01-18 00:28:18 +01:00
nf_conntrack_standalone.c netfilter: conntrack: use a single hashtable for all namespaces 2016-05-05 16:39:47 +02:00
nf_conntrack_tftp.c netfilter: nf_ct_helper: define pr_fmt() 2016-01-04 17:48:51 +01:00
nf_conntrack_timeout.c netfilter: cttimeout: add netns support 2015-12-14 12:48:58 +01:00
nf_conntrack_timestamp.c netfilter: nf_ct_timestamp: Fix BUG_ON after netns deletion 2013-12-20 14:58:29 +01:00
nf_dup_netdev.c net: remove skb_sender_cpu_clear() 2016-03-01 17:36:47 -05:00
nf_internals.h netfilter: nf_queue: fix nf_queue_nf_hook_drop() 2015-07-23 16:17:58 +02:00
nf_log.c netfilter: nf_log: Remove NULL check 2016-06-23 13:32:43 +02:00
nf_log_common.c netfilter: bridge: add helpers for fetching physin/outdev 2015-04-08 16:49:08 +02:00
nf_nat_amanda.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
nf_nat_core.c netfilter: conntrack: use a single nat bysource table for all namespaces 2016-05-09 16:45:49 +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_nat: fix access to uninitialized buffer in IRC NAT helper 2014-01-06 14:17:17 +01:00
nf_nat_proto_common.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_dccp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_sctp.c netfilter: use IS_ENABLED() macro 2014-06-30 11:38:03 +02:00
nf_nat_proto_tcp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udp.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_udplite.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_nat_proto_unknown.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_redirect.c netfilter: nf_nat_redirect: add missing NULL pointer check 2015-10-27 06:54:56 +01:00
nf_nat_sip.c netfilter: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +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: nf_queue: remove rcu_read_lock calls 2015-10-16 18:22:41 +02:00
nf_sockopt.c netfilter: don't use mutex_lock_interruptible() 2014-08-08 16:47:23 +02:00
nf_synproxy_core.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2015-09-05 21:57:42 -07:00
nf_tables_api.c netfilter: nf_tables: add generation mask to tables 2016-06-24 11:03:24 +02:00
nf_tables_core.c netfilter: nf_tables: fix nf_log_trace based tracing 2015-12-09 16:53:46 +01:00
nf_tables_inet.c netfilter: nf_tables: release objects on netns destruction 2015-12-28 18:34:35 +01:00
nf_tables_netdev.c netfilter: nf_tables_netdev: fix error path in module initialization 2016-01-18 13:53:37 +01:00
nf_tables_trace.c libnl: nla_put_be64(): align on a 64-bit area 2016-04-23 20:13:24 -04:00
nfnetlink.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-02-23 00:09:14 -05:00
nfnetlink_acct.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-05-15 13:32:48 -04:00
nfnetlink_cthelper.c netfilter: nfnetlink: pass down netns pointer to call() and call_rcu() 2015-12-28 18:41:41 +01:00
nfnetlink_cttimeout.c netfilter: conntrack: use a single hashtable for all namespaces 2016-05-05 16:39:47 +02:00
nfnetlink_log.c netfilter: xt_NFLOG: nflog-range does not truncate packets 2016-06-24 11:03:23 +02:00
nfnetlink_queue.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2016-04-12 22:34:56 -04:00
nft_bitwise.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_byteorder.c netfilter: nft_byteorder: avoid unneeded le/be conversion steps 2016-01-13 14:02:59 +01:00
nft_cmp.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_compat.c netfilter: nft_compat: check match/targetinfo attr size 2016-03-11 11:37:56 +01:00
nft_counter.c libnl: nla_put_be64(): align on a 64-bit area 2016-04-23 20:13:24 -04:00
nft_ct.c netfilter: nftables: add connlabel set support 2016-05-05 16:27:59 +02:00
nft_dup_netdev.c netfilter: nf_tables: add packet duplication to the netdev family 2016-01-03 21:04:23 +01:00
nft_dynset.c libnl: nla_put_be64(): align on a 64-bit area 2016-04-23 20:13:24 -04:00
nft_exthdr.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_fwd_netdev.c netfilter: nf_tables: add forward expression to the netdev family 2016-01-04 17:48:38 +01:00
nft_hash.c rhashtable: accept GFP flags in rhashtable_walk_init 2016-04-05 10:56:32 +02:00
nft_immediate.c netfilter: nf_tables: support variable sized data in nft_data_init() 2015-04-13 17:17:30 +02:00
nft_limit.c libnl: nla_put_be64(): align on a 64-bit area 2016-04-23 20:13:24 -04:00
nft_log.c netfilter: nf_log: handle NFPROTO_INET properly in nf_logger_[find_get|put] 2016-06-23 13:24:42 +02:00
nft_lookup.c netfilter: nf_tables: add flag to indicate set contains expressions 2015-04-13 20:12:32 +02:00
nft_masq.c netfilter: nft_masq: support port range 2016-03-02 20:05:27 +01:00
nft_meta.c netfilter: meta: add PRANDOM support 2016-02-29 13:55:59 +01:00
nft_nat.c netfilter: nf_tables: switch registers to 32 bit addressing 2015-04-13 17:17:29 +02:00
nft_payload.c netfilter: nft_payload: add packet mangling support 2015-11-25 13:54:51 +01:00
nft_queue.c netfilter: nf_tables: kill nft_pktinfo.ops 2015-09-18 21:58:01 +02:00
nft_rbtree.c netfilter: nft_rbtree: allow adjacent intervals with dynamic updates 2016-04-25 15:32:41 +02:00
nft_redir.c netfilter: nf_tables: add register parsing/dumping helpers 2015-04-13 17:17:28 +02:00
nft_reject.c netfilter; Add some missing default cases to switch statements in nft_reject. 2015-04-27 13:20:34 -04:00
nft_reject_inet.c ipv4: Push struct net down into nf_send_reset 2015-09-29 20:21:31 +02:00
x_tables.c netfilter: x_tables: fix possible ZERO_SIZE_PTR pointer dereferencing error. 2016-06-23 12:13:06 +02:00
xt_addrtype.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_AUDIT.c netfilter: Convert uses of __constant_<foo> to <foo> 2014-03-13 14:13:19 +01:00
xt_bpf.c net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
xt_cgroup.c netfilter: implement xt_cgroup cgroup2 path match 2015-12-14 20:34:55 +01:00
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_comment.c
xt_connbytes.c netfilter: Convert pr_warning to pr_warn 2014-09-10 12:40:10 -07:00
xt_connlabel.c netfilter: connlabels: change nf_connlabels_get bit arg to 'highest used' 2016-04-18 20:39:48 +02:00
xt_connlimit.c netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple 2015-09-18 22:00:04 +02:00
xt_connmark.c netfilter: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
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: cttimeout: add netns support 2015-12-14 12:48:58 +01:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c netfilter: fix various sparse warnings 2014-11-13 12:14:42 +01:00
xt_ecn.c netfilter: xtables: collapse conditions in xt_ecn 2011-12-27 20:45:25 +01:00
xt_esp.c
xt_hashlimit.c netfilter: Remove checks of seq_printf() return values 2014-11-05 14:11:02 -05:00
xt_helper.c
xt_hl.c
xt_HL.c
xt_HMARK.c net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
xt_IDLETIMER.c netfilter: IDLETIMER: fix race condition when destroy the target 2016-04-29 14:28:48 +02:00
xt_ipcomp.c netfilter: xt_ipcomp: Use ntohs to ease sparse warning 2014-02-19 11:41:25 +01:00
xt_iprange.c
xt_ipvs.c ipvs: Pass ipvs into conn_out_get 2015-09-24 09:34:41 +09:00
xt_l2tp.c netfilter: introduce l2tp match extension 2014-01-09 21:36:39 +01:00
xt_LED.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-05 18:46:26 -07:00
xt_length.c
xt_limit.c netfilter: add my copyright statements 2013-04-18 20:27:55 +02:00
xt_LOG.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +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 netfilter: xt_MARK: Add ARP support 2015-05-14 13:00:27 +02:00
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: nfacct: per network namespace support 2015-08-07 11:50:56 +02:00
xt_NFLOG.c netfilter: xt_NFLOG: nflog-range does not truncate packets 2016-06-24 11:03:23 +02:00
xt_NFQUEUE.c netfilter: xt_NFQUEUE: separate reusable code 2013-12-07 23:20:45 +01:00
xt_osf.c netfilter: xt_osf: remove unused variable 2016-02-29 13:59:43 +01:00
xt_owner.c netfilter: Allow xt_owner in any user namespace 2016-06-23 13:58:55 +02:00
xt_physdev.c netfilter: physdev: use helpers 2015-04-08 16:49:09 +02:00
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: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
xt_rateest.c net_sched: add 64bit rate estimators 2013-06-11 02:51:03 -07:00
xt_realm.c
xt_recent.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
xt_REDIRECT.c netfilter: combine IPv4 and IPv6 nf_nat_redirect code in one module 2014-11-27 13:08:42 +01:00
xt_repldata.h net: netfilter: LLVMLinux: vlais-netfilter 2014-06-07 11:44:39 -07:00
xt_sctp.c
xt_SECMARK.c
xt_set.c netfilter: ipset: Fix coding styles reported by checkpatch.pl 2015-06-14 10:40:18 +02:00
xt_socket.c tcp/dccp: do not touch listener sk_refcnt under synflood 2016-04-04 22:11:20 -04:00
xt_state.c
xt_statistic.c net: replace macros net_random and net_srandom with direct calls to prandom 2014-01-14 15:15:25 -08:00
xt_string.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
xt_TCPMSS.c netfilter: xt_TCPMSS: handle CHECKSUM_COMPLETE in tcpmss_tg6() 2016-01-18 12:18:17 +01:00
xt_tcpmss.c
xt_TCPOPTSTRIP.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
xt_tcpudp.c
xt_TEE.c netfilter: tee: select NF_DUP_IPV6 unconditionally 2016-02-08 12:58:28 +01:00
xt_time.c netfilter: xt_time: add support to ignore day transition 2012-09-24 14:29:01 +02:00
xt_TPROXY.c inet: refactor inet[6]_lookup functions to take skb 2016-02-11 03:54:14 -05:00
xt_TRACE.c netfilter: xt_TRACE: add explicitly nf_logger_find_get call 2016-06-23 13:26:49 +02:00
xt_u32.c