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[IPV4]: Increase number of possible routing tables to 2^32

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Increase the number of possible routing tables to 2^32 by replacing the
fixed sized array of pointers by a hash table and replacing iterations
over all possible table IDs by hash table walking.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2006-08-10 23:10:46 -07:00
committed by David S. Miller
parent 9e762a4a89
commit 1af5a8c4a1
5 changed files with 100 additions and 81 deletions
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25
include/net/ip_fib.h
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@@ -150,6 +150,7 @@ struct fib_result_nl {
#endif /* CONFIG_IP_ROUTE_MULTIPATH_WRANDOM */
struct fib_table {
struct hlist_node tb_hlist;
u32 tb_id;
unsigned tb_stamp;
int (*tb_lookup)(struct fib_table *tb, const struct flowi *flp, struct fib_result *res);
@@ -200,29 +201,13 @@ static inline void fib_select_default(const struct flowi *flp, struct fib_result
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
#define ip_fib_local_table (fib_tables[RT_TABLE_LOCAL])
#define ip_fib_main_table (fib_tables[RT_TABLE_MAIN])
#define ip_fib_local_table fib_get_table(RT_TABLE_LOCAL)
#define ip_fib_main_table fib_get_table(RT_TABLE_MAIN)
extern struct fib_table * fib_tables[RT_TABLE_MAX+1];
extern int fib_lookup(struct flowi *flp, struct fib_result *res);
extern struct fib_table *__fib_new_table(u32 id);
static inline struct fib_table *fib_get_table(u32 id)
{
if (id == 0)
id = RT_TABLE_MAIN;
return fib_tables[id];
}
static inline struct fib_table *fib_new_table(u32 id)
{
if (id == 0)
id = RT_TABLE_MAIN;
return fib_tables[id] ? : __fib_new_table(id);
}
extern struct fib_table *fib_new_table(u32 id);
extern struct fib_table *fib_get_table(u32 id);
extern void fib_select_default(const struct flowi *flp, struct fib_result *res);
#endif /* CONFIG_IP_MULTIPLE_TABLES */