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net: Allow fib_rule_unregister to batch

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Refactor the code so fib_rules_register always takes a template instead
of the actual fib_rules_ops structure that will be used.  This is
required for network namespace support so 2 out of the 3 callers already
do this, it allows the error handling to be made common, and it allows
fib_rules_unregister to free the template for hte caller.

Modify fib_rules_unregister to use call_rcu instead of syncrhonize_rcu
to allw multiple namespaces to be cleaned up in the same rcu grace
period.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman
2009-12-03 12:22:55 -08:00
committed by David S. Miller
parent 3a765edadb
commit e9c5158ac2
5 changed files with 57 additions and 38 deletions
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3
include/net/fib_rules.h
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@@ -66,6 +66,7 @@ struct fib_rules_ops {
struct list_head rules_list;
struct module *owner;
struct net *fro_net;
struct rcu_head rcu;
};
#define FRA_GENERIC_POLICY \
@@ -102,7 +103,7 @@ static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
return frh->table;
}
extern int fib_rules_register(struct fib_rules_ops *);
extern struct fib_rules_ops *fib_rules_register(struct fib_rules_ops *, struct net *);
extern void fib_rules_unregister(struct fib_rules_ops *);
extern void fib_rules_cleanup_ops(struct fib_rules_ops *);