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| author | Rami Rosen <ramirose@gmail.com> | 2013-04-08 04:04:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-08 16:55:28 -0400 |
| commit | 077f02f1baee7c1eed800e95c7bb76a6be5226d4 (patch) | |
| tree | 14f23789c2ae0731b2a2e3b9af1306c6e6042304 /Documentation/cgroups | |
| parent | f53adae4eae5ad9f7343ff4a0fc68b468c981138 (diff) | |
| download | lwn-077f02f1baee7c1eed800e95c7bb76a6be5226d4.tar.gz lwn-077f02f1baee7c1eed800e95c7bb76a6be5226d4.zip | |
Documentation: cgroup: add documentation for net_cls cgroups.
This patch adds a new file, Documentation/cgroups/net_cls.txt, with info
about net_cls cgroups, and updates the 00-INDEX accordingly.
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/cgroups')
| -rw-r--r-- | Documentation/cgroups/00-INDEX | 2 | ||||
| -rw-r--r-- | Documentation/cgroups/net_cls.txt | 34 |
2 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/cgroups/00-INDEX b/Documentation/cgroups/00-INDEX index f5635a09c3f6..bc461b6425a7 100644 --- a/Documentation/cgroups/00-INDEX +++ b/Documentation/cgroups/00-INDEX @@ -18,6 +18,8 @@ memcg_test.txt - Memory Resource Controller; implementation details. memory.txt - Memory Resource Controller; design, accounting, interface, testing. +net_cls.txt + - Network classifier cgroups details and usages. net_prio.txt - Network priority cgroups details and usages. resource_counter.txt diff --git a/Documentation/cgroups/net_cls.txt b/Documentation/cgroups/net_cls.txt new file mode 100644 index 000000000000..9face6bb578a --- /dev/null +++ b/Documentation/cgroups/net_cls.txt @@ -0,0 +1,34 @@ +Network classifier cgroup +------------------------- + +The Network classifier cgroup provides an interface to +tag network packets with a class identifier (classid). + +The Traffic Controller (tc) can be used to assign +different priorities to packets from different cgroups. + +Creating a net_cls cgroups instance creates a net_cls.classid file. +This net_cls.classid value is initialized to 0. + +You can write hexadecimal values to net_cls.classid; the format for these +values is 0xAAAABBBB; AAAA is the major handle number and BBBB +is the minor handle number. +Reading net_cls.classid yields a decimal result. + +Example: +mkdir /sys/fs/cgroup/net_cls +mount -t cgroup -onet_cls net_cls /sys/fs/cgroup/net_cls +mkdir /sys/fs/cgroup/net_cls/0 +echo 0x100001 > /sys/fs/cgroup/net_cls/0/net_cls.classid + - setting a 10:1 handle. + +cat /sys/fs/cgroup/net_cls/0/net_cls.classid +1048577 + +configuring tc: +tc qdisc add dev eth0 root handle 10: htb + +tc class add dev eth0 parent 10: classid 10:1 htb rate 40mbit + - creating traffic class 10:1 + +tc filter add dev eth0 parent 10: protocol ip prio 10 handle 1: cgroup |