lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

netfilter: accounting rework: ct_extend + 64bit counters (v4)

Browse Source 
Initially netfilter has had 64bit counters for conntrack-based accounting, but
it was changed in 2.6.14 to save memory. Unfortunately in-kernel 64bit counters are
still required, for example for "connbytes" extension. However, 64bit counters
waste a lot of memory and it was not possible to enable/disable it runtime.

This patch:
 - reimplements accounting with respect to the extension infrastructure,
 - makes one global version of seq_print_acct() instead of two seq_print_counters(),
 - makes it possible to enable it at boot time (for CONFIG_SYSCTL/CONFIG_SYSFS=n),
 - makes it possible to enable/disable it at runtime by sysctl or sysfs,
 - extends counters from 32bit to 64bit,
 - renames ip_conntrack_counter -> nf_conn_counter,
 - enables accounting code unconditionally (no longer depends on CONFIG_NF_CT_ACCT),
 - set initial accounting enable state based on CONFIG_NF_CT_ACCT
 - removes buggy IPCT_COUNTER_FILLING event handling.

If accounting is enabled newly created connections get additional acct extend.
Old connections are not changed as it is not possible to add a ct_extend area
to confirmed conntrack. Accounting is performed for all connections with
acct extend regardless of a current state of "net.netfilter.nf_conntrack_acct".

Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krzysztof Piotr Oledzki
2008-07-21 10:01:34 -07:00
committed by David S. Miller
parent 07a7c1070e
commit 584015727a
15 changed files with 248 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/netfilter/nf_conntrack_common.h
View File

@ -122,7 +122,7 @@ enum ip_conntrack_events
IPCT_NATINFO_BIT = 10,
IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
/* Counter highest bit has been set */
/* Counter highest bit has been set, unused */
IPCT_COUNTER_FILLING_BIT = 11,
IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
@ -145,12 +145,6 @@ enum ip_conntrack_expect_events {
};
#ifdef __KERNEL__
struct ip_conntrack_counter
{
u_int32_t packets;
u_int32_t bytes;
};
struct ip_conntrack_stat
{
unsigned int searched;

8
include/linux/netfilter/nfnetlink_conntrack.h
View File

@ -115,10 +115,10 @@ enum ctattr_protoinfo_sctp {
enum ctattr_counters {
CTA_COUNTERS_UNSPEC,
CTA_COUNTERS_PACKETS, /* old 64bit counters */
CTA_COUNTERS_BYTES, /* old 64bit counters */
CTA_COUNTERS32_PACKETS,
CTA_COUNTERS32_BYTES,
CTA_COUNTERS_PACKETS, /* 64bit counters */
CTA_COUNTERS_BYTES, /* 64bit counters */
CTA_COUNTERS32_PACKETS, /* old 32bit counters, unused */
CTA_COUNTERS32_BYTES, /* old 32bit counters, unused */
__CTA_COUNTERS_MAX
};
#define CTA_COUNTERS_MAX (__CTA_COUNTERS_MAX - 1)