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Code Issues Releases Wiki Activity

packets: Make eth_addr_is_reserved() thread-safe.

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Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Ben Pfaff
2013-04-23 15:03:57 -07:00
parent d2d3264cd6
commit 8c45d00f56
1 changed files with 7 additions and 3 deletions
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10
lib/packets.c
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@@ -27,6 +27,7 @@
#include "hmap.h"
#include "dynamic-string.h"
#include "ofpbuf.h"
#include "ovs-thread.h"
const struct in6_addr in6addr_exact = IN6ADDR_EXACT_INIT;
@@ -54,7 +55,7 @@ eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN])
{
struct eth_addr_node {
struct hmap_node hmap_node;
uint64_t ea64;
const uint64_t ea64;
};
static struct eth_addr_node nodes[] = {
@@ -100,15 +101,18 @@ eth_addr_is_reserved(const uint8_t ea[ETH_ADDR_LEN])
{ HMAP_NODE_NULL_INITIALIZER, 0x01000cccccc7ULL },
};
static struct hmap addrs = HMAP_INITIALIZER(&addrs);
static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
struct eth_addr_node *node;
static struct hmap addrs;
uint64_t ea64;
if (hmap_is_empty(&addrs)) {
if (ovsthread_once_start(&once)) {
hmap_init(&addrs);
for (node = nodes; node < &nodes[ARRAY_SIZE(nodes)]; node++) {
hmap_insert(&addrs, &node->hmap_node,
hash_2words(node->ea64, node->ea64 >> 32));
}
ovsthread_once_done(&once);
}
ea64 = eth_addr_to_uint64(ea);