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| author | Krzysztof Piotr Oledzki <ole@ans.pl> | 2008-07-21 10:01:34 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-21 10:10:58 -0700 |
| commit | 584015727a3b88b46602b20077b46cd04f8b4ab3 (patch) | |
| tree | a9b4ec18e2181e03ee24b59b30f7408bcbcf140c /Documentation | |
| parent | 07a7c1070ed382ad4562e3a0d453fd2001d92f7b (diff) | |
| download | linux-584015727a3b88b46602b20077b46cd04f8b4ab3.tar.bz2 | |
netfilter: accounting rework: ct_extend + 64bit counters (v4)
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 10 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 7 |
2 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 86334b6f8238..9f73587219e8 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -336,3 +336,13 @@ When: After the only user (hal) has seen a release with the patches Why: Over 1K .text/.data size reduction, data is available in other ways (ioctls) Who: Johannes Berg <johannes@sipsolutions.net> + +--------------------------- + +What: CONFIG_NF_CT_ACCT +When: 2.6.29 +Why: Accounting can now be enabled/disabled without kernel recompilation. + Currently used only to set a default value for a feature that is also + controlled by a kernel/module/sysfs/sysctl parameter. +Who: Krzysztof Piotr Oledzki <ole@ans.pl> + diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 09ad7450647b..e4ef27584408 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1279,6 +1279,13 @@ and is between 256 and 4096 characters. It is defined in the file This usage is only documented in each driver source file if at all. + nf_conntrack.acct= + [NETFILTER] Enable connection tracking flow accounting + 0 to disable accounting + 1 to enable accounting + Default value depends on CONFIG_NF_CT_ACCT that is + going to be removed in 2.6.29. + nfsaddrs= [NFS] See Documentation/filesystems/nfsroot.txt. |