linux/include/net/netns
Pablo Neira Ayuso a992ca2a04 netfilter: nf_conntrack_tstamp: add flow-based timestamp extension
This patch adds flow-based timestamping for conntracks. This
conntrack extension is disabled by default. Basically, we use
two 64-bits variables to store the creation timestamp once the
conntrack has been confirmed and the other to store the deletion
time. This extension is disabled by default, to enable it, you
have to:

echo 1 > /proc/sys/net/netfilter/nf_conntrack_timestamp

This patch allows to save memory for user-space flow-based
loogers such as ulogd2. In short, ulogd2 does not need to
keep a hashtable with the conntrack in user-space to know
when they were created and destroyed, instead we use the
kernel timestamp. If we want to have a sane IPFIX implementation
in user-space, this nanosecs resolution timestamps are also
useful. Other custom user-space applications can benefit from
this via libnetfilter_conntrack.

This patch modifies the /proc output to display the delta time
in seconds since the flow start. You can also obtain the
flow-start date by means of the conntrack-tools.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-01-19 16:00:07 +01:00
..
conntrack.h netfilter: nf_conntrack_tstamp: add flow-based timestamp extension 2011-01-19 16:00:07 +01:00
core.h percpu: add __percpu sparse annotations to net 2010-02-16 23:05:38 -08:00
dccp.h [NETNS][DCCPV6]: Move the dccp_v6_ctl_sk on the struct net. 2008-04-13 22:32:25 -07:00
generic.h netns: let net_generic take pointer-to-const args 2010-11-21 10:05:10 -08:00
hash.h netns: introduce the net_hash_mix "salt" for hashes 2008-06-16 17:14:11 -07:00
ip_vs.h IPVS: netns, svc counters moved in ip_vs_ctl,c 2011-01-13 10:30:28 +09:00
ipv4.h netfilter: nf_conntrack: use is_vmalloc_addr() 2011-01-14 15:45:56 +01:00
ipv6.h ipv6: ip6mr: support multiple tables 2010-05-11 14:40:55 +02:00
mib.h netns xfrm: per-netns MIBs 2008-11-25 17:59:52 -08:00
packet.h packet: convert socket list to RCU (v3) 2010-02-22 15:45:56 -08:00
unix.h [NETNS]: struct net content re-work (v3) 2008-01-28 14:57:14 -08:00
x_tables.h net, netns_xt: shrink netns_xt members 2009-07-05 19:16:18 -07:00
xfrm.h netns: reorder fields in struct net 2010-10-17 13:49:14 -07:00