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Add hash support to route cache 

This patch adds keygen function to route object

Signed-off-by: Shrijeet Mukherjee <shm@cumulusnetworks.com>
Signed-off-by: Nolan Leake <nolan@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Wilson Kok <wkok@cumulusnetworks.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
This commit is contained in:
roopa 2012-11-09 14:41:36 -08:00 committed by Thomas Graf
parent 6f24cf12ca
commit a2207c7beb
1 changed files with 47 additions and 0 deletions
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47
lib/route/route_obj.c
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@ -35,6 +35,7 @@
#include <netlink/cache.h>
#include <netlink/utils.h>
#include <netlink/data.h>
#include <netlink/hashtable.h>
#include <netlink/route/rtnl.h>
#include <netlink/route/route.h>
#include <netlink/route/link.h>
@ -289,6 +290,51 @@ static void route_dump_stats(struct nl_object *obj, struct nl_dump_params *p)
}
}
static void route_keygen(struct nl_object *obj, uint32_t *hashkey,
uint32_t table_sz)
{
struct rtnl_route *route = (struct rtnl_route *) obj;
unsigned int rkey_sz;
struct nl_addr *addr = NULL;
struct route_hash_key {
uint8_t rt_family;
uint8_t rt_tos;
uint32_t rt_table;
char rt_addr[0];
} __attribute__((packed)) *rkey;
char buf[INET6_ADDRSTRLEN+5];
if (route->rt_dst)
addr = route->rt_dst;
rkey_sz = sizeof(*rkey);
if (addr)
rkey_sz += nl_addr_get_len(addr);
rkey = calloc(1, rkey_sz);
if (!rkey) {
NL_DBG(2, "Warning: calloc failed for %d bytes...\n", rkey_sz);
*hashkey = 0;
return;
}
rkey->rt_family = route->rt_family;
rkey->rt_tos = route->rt_tos;
rkey->rt_table = route->rt_table;
if (addr)
memcpy(rkey->rt_addr, nl_addr_get_binary_addr(addr),
nl_addr_get_len(addr));
*hashkey = nl_hash(rkey, rkey_sz, 0) % table_sz;
NL_DBG(5, "route %p key (fam %d tos %d table %d addr %s) keysz %d "
"hash 0x%x\n", route, rkey->rt_family, rkey->rt_tos,
rkey->rt_table, nl_addr2str(addr, buf, sizeof(buf)),
rkey_sz, *hashkey);
free(rkey);
return;
}
static int route_compare(struct nl_object *_a, struct nl_object *_b,
uint32_t attrs, int flags)
{
@ -1151,6 +1197,7 @@ struct nl_object_ops route_obj_ops = {
[NL_DUMP_STATS] = route_dump_stats,
},
.oo_compare = route_compare,
.oo_keygen = route_keygen,
.oo_attrs2str = route_attrs2str,
.oo_id_attrs = (ROUTE_ATTR_FAMILY | ROUTE_ATTR_TOS |
ROUTE_ATTR_TABLE | ROUTE_ATTR_DST),