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Cleanup ll_map

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In preparation for adding name hash:
  * add const
  * use same types in cache as ifinfomsg
  * rename idxmap to ll_cache
This commit is contained in:
Stephen Hemminger 2010-12-10 11:49:29 -08:00
parent 3056423728
commit 4b3385f6c5
1 changed files with 34 additions and 25 deletions
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59
lib/ll_map.c
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@ -18,32 +18,38 @@
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <linux/if.h>
#include "libnetlink.h"
#include "ll_map.h"
extern unsigned int if_nametoindex (const char *);
struct idxmap
struct ll_cache
{
struct idxmap * next;
unsigned index;
int type;
int alen;
struct ll_cache *idx_next;
unsigned flags;
int index;
unsigned short type;
unsigned short alen;
char name[IFNAMSIZ];
unsigned char addr[20];
char name[16];
};
#define IDXMAP_SIZE 1024
static struct idxmap *idxmap[IDXMAP_SIZE];
static struct ll_cache *idx_head[IDXMAP_SIZE];
static inline struct ll_cache *idxhead(int idx)
{
return idx_head[idx & (IDXMAP_SIZE - 1)];
}
int ll_remember_index(const struct sockaddr_nl *who,
struct nlmsghdr *n, void *arg)
{
int h;
struct ifinfomsg *ifi = NLMSG_DATA(n);
struct idxmap *im, **imp;
struct ll_cache *im, **imp;
struct rtattr *tb[IFLA_MAX+1];
if (n->nlmsg_type != RTM_NEWLINK)
@ -58,7 +64,7 @@ int ll_remember_index(const struct sockaddr_nl *who,
return 0;
h = ifi->ifi_index & (IDXMAP_SIZE - 1);
for (imp = &idxmap[h]; (im=*imp)!=NULL; imp = &im->next)
for (imp = &idx_head[h]; (im=*imp)!=NULL; imp = &im->idx_next)
if (im->index == ifi->ifi_index)
break;
@ -66,7 +72,7 @@ int ll_remember_index(const struct sockaddr_nl *who,
im = malloc(sizeof(*im));
if (im == NULL)
return 0;
im->next = *imp;
im->idx_next = *imp;
im->index = ifi->ifi_index;
*imp = im;
}
@ -89,33 +95,34 @@ int ll_remember_index(const struct sockaddr_nl *who,
const char *ll_idx_n2a(unsigned idx, char *buf)
{
struct idxmap *im;
const struct ll_cache *im;
if (idx == 0)
return "*";
for (im = idxmap[idx & (IDXMAP_SIZE - 1)]; im; im = im->next)
for (im = idxhead(idx); im; im = im->idx_next)
if (im->index == idx)
return im->name;
snprintf(buf, 16, "if%d", idx);
snprintf(buf, IFNAMSIZ, "if%d", idx);
return buf;
}
const char *ll_index_to_name(unsigned idx)
{
static char nbuf[16];
static char nbuf[IFNAMSIZ];
return ll_idx_n2a(idx, nbuf);
}
int ll_index_to_type(unsigned idx)
{
struct idxmap *im;
const struct ll_cache *im;
if (idx == 0)
return -1;
for (im = idxmap[idx&0xF]; im; im = im->next)
for (im = idxhead(idx); im; im = im->idx_next)
if (im->index == idx)
return im->type;
return -1;
@ -123,12 +130,12 @@ int ll_index_to_type(unsigned idx)
unsigned ll_index_to_flags(unsigned idx)
{
struct idxmap *im;
const struct ll_cache *im;
if (idx == 0)
return 0;
for (im = idxmap[idx&0xF]; im; im = im->next)
for (im = idxhead(idx); im; im = im->idx_next)
if (im->index == idx)
return im->flags;
return 0;
@ -137,12 +144,12 @@ unsigned ll_index_to_flags(unsigned idx)
unsigned ll_index_to_addr(unsigned idx, unsigned char *addr,
unsigned alen)
{
struct idxmap *im;
const struct ll_cache *im;
if (idx == 0)
return 0;
for (im = idxmap[idx&0xF]; im; im = im->next) {
for (im = idxhead(idx); im; im = im->idx_next) {
if (im->index == idx) {
if (alen > sizeof(im->addr))
alen = sizeof(im->addr);
@ -157,18 +164,20 @@ unsigned ll_index_to_addr(unsigned idx, unsigned char *addr,
unsigned ll_name_to_index(const char *name)
{
static char ncache[16];
static char ncache[IFNAMSIZ];
static int icache;
struct idxmap *im;
struct ll_cache *im;
int i;
unsigned idx;
if (name == NULL)
return 0;
if (icache && strcmp(name, ncache) == 0)
return icache;
for (i=0; i<16; i++) {
for (im = idxmap[i]; im; im = im->next) {
for (i=0; i<IDXMAP_SIZE; i++) {
for (im = idx_head[i]; im; im = im->idx_next) {
if (strcmp(im->name, name) == 0) {
icache = im->index;
strcpy(ncache, name);
@ -195,7 +204,7 @@ int ll_init_map(struct rtnl_handle *rth)
exit(1);
}
if (rtnl_dump_filter(rth, ll_remember_index, &idxmap, NULL, NULL) < 0) {
if (rtnl_dump_filter(rth, ll_remember_index, NULL, NULL, NULL) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}