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/*
* lib/route/cls/cgroup.c Control Groups Classifier
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2009-2013 Thomas Graf <tgraf@suug.ch>
*/
/**
* @ingroup cls
* @defgroup cls_cgroup Control Groups Classifier
*
* @{
*/
#include <netlink-private/netlink.h>
#include <netlink-private/tc.h>
#include <netlink/netlink.h>
#include <netlink/attr.h>
#include <netlink/utils.h>
#include <netlink-private/route/tc-api.h>
#include <netlink/route/classifier.h>
#include <netlink/route/cls/cgroup.h>
#include <netlink/route/cls/ematch.h>
/** @cond SKIP */
#define CGROUP_ATTR_EMATCH 0x001
/** @endcond */
static struct nla_policy cgroup_policy[TCA_CGROUP_MAX+1] = {
[TCA_CGROUP_EMATCHES] = { .type = NLA_NESTED },
};
static int cgroup_clone(void *dst, void *src)
{
return -NLE_OPNOTSUPP;
}
static void cgroup_free_data(struct rtnl_tc *tc, void *data)
{
struct rtnl_cgroup *c = data;
if (!c)
return;
rtnl_ematch_tree_free(c->cg_ematch);
}
static int cgroup_msg_parser(struct rtnl_tc *tc, void *data)
{
struct nlattr *tb[TCA_CGROUP_MAX + 1];
struct rtnl_cgroup *c = data;
int err;
err = tca_parse(tb, TCA_CGROUP_MAX, tc, cgroup_policy);
if (err < 0)
return err;
if (tb[TCA_CGROUP_EMATCHES]) {
if ((err = rtnl_ematch_parse_attr(tb[TCA_CGROUP_EMATCHES],
&c->cg_ematch)) < 0)
return err;
c->cg_mask |= CGROUP_ATTR_EMATCH;
}
#if 0
TODO:
TCA_CGROUP_ACT,
TCA_CGROUP_POLICE,
#endif
return 0;
}
static void cgroup_dump_line(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_cgroup *c = data;
if (!c)
return;
if (c->cg_mask & CGROUP_ATTR_EMATCH)
nl_dump(p, " ematch");
else
nl_dump(p, " match-all");
}
static void cgroup_dump_details(struct rtnl_tc *tc, void *data,
struct nl_dump_params *p)
{
struct rtnl_cgroup *c = data;
if (!c)
return;
if (c->cg_mask & CGROUP_ATTR_EMATCH) {
nl_dump_line(p, " ematch ");
if (c->cg_ematch)
rtnl_ematch_tree_dump(c->cg_ematch, p);
else
nl_dump(p, "<no tree>");
} else
nl_dump(p, "no options");
}
static int cgroup_fill_msg(struct rtnl_tc *tc, void *data,
struct nl_msg *msg)
{
struct rtnl_cgroup *c = data;
if (!c)
BUG();
if (!(tc->ce_mask & TCA_ATTR_HANDLE))
return -NLE_MISSING_ATTR;
if (c->cg_mask & CGROUP_ATTR_EMATCH)
return rtnl_ematch_fill_attr(msg, TCA_CGROUP_EMATCHES,
c->cg_ematch);
return 0;
}
/**
* @name Attribute Modifications
* @{
*/
void rtnl_cgroup_set_ematch(struct rtnl_cls *cls, struct rtnl_ematch_tree *tree)
{
struct rtnl_cgroup *c;
if (!(c = rtnl_tc_data(TC_CAST(cls))))
BUG();
if (c->cg_ematch) {
rtnl_ematch_tree_free(c->cg_ematch);
c->cg_mask &= ~CGROUP_ATTR_EMATCH;
}
c->cg_ematch = tree;
if (tree)
c->cg_mask |= CGROUP_ATTR_EMATCH;
}
struct rtnl_ematch_tree *rtnl_cgroup_get_ematch(struct rtnl_cls *cls)
{
struct rtnl_cgroup *c;
if (!(c = rtnl_tc_data(TC_CAST(cls))))
BUG();
return c->cg_ematch;
}
/** @} */
static struct rtnl_tc_ops cgroup_ops = {
.to_kind = "cgroup",
.to_type = RTNL_TC_TYPE_CLS,
.to_size = sizeof(struct rtnl_cgroup),
.to_clone = cgroup_clone,
.to_msg_parser = cgroup_msg_parser,
.to_free_data = cgroup_free_data,
.to_msg_fill = cgroup_fill_msg,
.to_dump = {
[NL_DUMP_LINE] = cgroup_dump_line,
[NL_DUMP_DETAILS] = cgroup_dump_details,
},
};
static void __init cgroup_init(void)
{
rtnl_tc_register(&cgroup_ops);
}
static void __exit cgroup_exit(void)
{
rtnl_tc_unregister(&cgroup_ops);
}
/** @} */
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