Eric Dumazet 83723d6071 netfilter: x_tables: dont block BH while reading counters ... Using "iptables -L" with a lot of rules have a too big BH latency. Jesper mentioned ~6 ms and worried of frame drops. Switch to a per_cpu seqlock scheme, so that taking a snapshot of counters doesnt need to block BH (for this cpu, but also other cpus). This adds two increments on seqlock sequence per ipt_do_table() call, its a reasonable cost for allowing "iptables -L" not block BH processing. Reported-by: Jesper Dangaard Brouer <hawk@comx.dk> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Patrick McHardy <kaber@trash.net> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Jesper Dangaard Brouer <hawk@comx.dk> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2011-01-10 20:11:38 +01:00
..
Kconfig	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
Makefile	Net: ipv4: netfilter: Makefile: Remove deprecated kbuild goal definitions	2010-11-22 08:16:11 -08:00
arp_tables.c	netfilter: x_tables: dont block BH while reading counters	2011-01-10 20:11:38 +01:00
arpt_mangle.c	netfilter: xtables: resolve indirect macros 3/3	2010-10-13 18:00:46 +02:00
arptable_filter.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
ip_queue.c	netfilter: ip_queue: rwlock to spinlock conversion	2010-06-09 15:47:41 +02:00
ip_tables.c	netfilter: x_tables: dont block BH while reading counters	2011-01-10 20:11:38 +01:00
ipt_CLUSTERIP.c	netfilter: ipt_CLUSTERIP: use proto_ports_offset() to support AH message	2010-08-19 17:16:24 -07:00
ipt_ECN.c	netfilter: xtables: substitute temporary defines by final name	2010-05-11 18:31:17 +02:00
ipt_LOG.c	netfilter: ipt_LOG: add bufferisation to call printk() once	2010-10-04 20:56:05 +02:00
ipt_MASQUERADE.c	netfilter: xtables: substitute temporary defines by final name	2010-05-11 18:31:17 +02:00
ipt_NETMAP.c	netfilter: nf_nat: support user-specified SNAT rules in LOCAL_IN	2010-06-17 06:12:26 +02:00
ipt_REDIRECT.c	netfilter: xtables: substitute temporary defines by final name	2010-05-11 18:31:17 +02:00
ipt_REJECT.c	ipv4: Don't pre-seed hoplimit metric.	2010-12-12 22:08:17 -08:00
ipt_ULOG.c	netfilter: xtables: substitute temporary defines by final name	2010-05-11 18:31:17 +02:00
ipt_addrtype.c	netfilter: xtables: deconstify struct xt_action_param for matches	2010-05-11 18:33:37 +02:00
ipt_ah.c	netfilter: xtables: change hotdrop pointer to direct modification	2010-05-11 18:35:27 +02:00
ipt_ecn.c	netfilter: xtables: change hotdrop pointer to direct modification	2010-05-11 18:35:27 +02:00
iptable_filter.c	netfilter: cleanup printk messages	2010-05-13 15:02:08 +02:00
iptable_mangle.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
iptable_raw.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
iptable_security.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
nf_conntrack_l3proto_ipv4.c	netfilter: cleanup printk messages	2010-05-13 15:02:08 +02:00
nf_conntrack_l3proto_ipv4_compat.c	netfilter: fix export secctx error handling	2011-01-06 11:25:00 -08:00
nf_conntrack_proto_icmp.c	netfilter: nf_conntrack: add support for "conntrack zones"	2010-02-15 18:13:33 +01:00
nf_defrag_ipv4.c	netfilter: nf_conntrack_defrag: check socket type before touching nodefrag flag	2010-09-22 13:13:34 -07:00
nf_nat_amanda.c	netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpers	2010-09-22 08:34:12 +02:00
nf_nat_core.c	netfilter: nf_nat: fix compiler warning with CONFIG_NF_CT_NETLINK=n	2010-10-29 16:28:07 +02:00
nf_nat_ftp.c	netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpers	2010-09-22 08:34:12 +02:00
nf_nat_h323.c	netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpers	2010-09-22 08:34:12 +02:00
nf_nat_helper.c	netfilter: nf_nat: add nf_nat_csum()	2010-09-15 19:24:50 +02:00
nf_nat_irc.c	netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpers	2010-09-22 08:34:12 +02:00
nf_nat_pptp.c	netfilter: nf_conntrack: add support for "conntrack zones"	2010-02-15 18:13:33 +01:00
nf_nat_proto_common.c	netfilter: nf_nat: don't check if the tuple is unique when there isn't any other choice	2010-08-02 17:35:49 +02:00
nf_nat_proto_dccp.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_proto_gre.c	netfilter: nf_nat: don't check if the tuple is unique when there isn't any other choice	2010-08-02 17:35:49 +02:00
nf_nat_proto_icmp.c	netfilter: nf_nat: don't check if the tuple is unique when there isn't any other choice	2010-08-02 17:35:49 +02:00
nf_nat_proto_sctp.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_proto_tcp.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_proto_udp.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_proto_udplite.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_proto_unknown.c	netfilter: nf_nat: make unique_tuple return void	2010-08-02 17:20:54 +02:00
nf_nat_rule.c	netfilter: nf_nat: no IP_NAT_RANGE_MAP_IPS flags when alloc_null_binding()	2010-09-16 19:47:51 +02:00
nf_nat_sip.c	netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpers	2010-09-22 08:34:12 +02:00
nf_nat_snmp_basic.c	netfilter: nf_nat_snmp: fix checksum calculation (v4)	2010-09-22 13:13:33 -07:00
nf_nat_standalone.c	netfilter: nf_nat: support user-specified SNAT rules in LOCAL_IN	2010-06-17 06:12:26 +02:00
nf_nat_tftp.c	netfilter: fix some coding styles and remove moduleparam.h	2010-04-13 11:25:41 +02:00