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net: sched: introduce chain templates

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Allow user to set a template for newly created chains. Template lock
down the chain for particular classifier type/options combinations.
The classifier needs to support templates, otherwise kernel would
reply with error.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko
2018-07-23 09:23:07 +02:00
committed by David S. Miller
parent 32a4f5ecd7
commit 9f407f1768
2 changed files with 77 additions and 0 deletions
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12
include/net/sch_generic.h
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@@ -238,6 +238,8 @@ struct tcf_result {
};
};
struct tcf_chain;
struct tcf_proto_ops {
struct list_head head;
char kind[IFNAMSIZ];
@@ -263,10 +265,18 @@ struct tcf_proto_ops {
tc_setup_cb_t *cb, void *cb_priv,
struct netlink_ext_ack *extack);
void (*bind_class)(void *, u32, unsigned long);
void * (*tmplt_create)(struct net *net,
struct tcf_chain *chain,
struct nlattr **tca,
struct netlink_ext_ack *extack);
void (*tmplt_destroy)(void *tmplt_priv);
/* rtnetlink specific */
int (*dump)(struct net*, struct tcf_proto*, void *,
struct sk_buff *skb, struct tcmsg*);
int (*tmplt_dump)(struct sk_buff *skb,
struct net *net,
void *tmplt_priv);
struct module *owner;
};
@@ -305,6 +315,8 @@ struct tcf_chain {
u32 index; /* chain index */
unsigned int refcnt;
bool explicitly_created;
const struct tcf_proto_ops *tmplt_ops;
void *tmplt_priv;
};
struct tcf_block {