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[IPV4] fib_trie: size and statistics 

Show number of entries in trie, the size field was being set but never used,
but it only counted leaves, not all entries. Refactor the two cases in
fib_triestat_seq_show into a single routine.

Note: the stat structure was being malloc'd but the stack usage isn't so
high (288 bytes) that it is worth the additional complexity.

Signed-off-by: Stephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2008-01-14 23:11:54 -08:00 committed by David S. Miller
parent 28d36e3702
commit d717a9a620
1 changed files with 22 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
net/ipv4/fib_trie.c
View File

@ -148,10 +148,10 @@ struct trie_stat {
struct trie {
struct node *trie;
unsigned int size;
#ifdef CONFIG_IP_FIB_TRIE_STATS
struct trie_use_stats stats;
#endif
int size;
};
static void put_child(struct trie *t, struct tnode *tn, int i, struct node *n);
@ -1045,7 +1045,6 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
insert_leaf_info(&l->list, li);
goto done;
}
t->size++;
l = leaf_new();
if (!l)
@ -1261,6 +1260,8 @@ static int fn_trie_insert(struct fib_table *tb, struct fib_config *cfg)
list_add_tail_rcu(&new_fa->fa_list,
(fa ? &fa->fa_list : fa_head));
t->size++;
rt_cache_flush(-1);
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id,
&cfg->fc_nlinfo, 0);
@ -2131,50 +2132,34 @@ static void trie_show_usage(struct seq_file *seq,
}
#endif /* CONFIG_IP_FIB_TRIE_STATS */
static void fib_trie_show(struct seq_file *seq, const char *name, struct trie *trie)
{
struct trie_stat stat;
seq_printf(seq, "%s: %d\n", name, trie->size);
trie_collect_stats(trie, &stat);
trie_show_stats(seq, &stat);
#ifdef CONFIG_IP_FIB_TRIE_STATS
trie_show_usage(seq, &trie->stats);
#endif
}
static int fib_triestat_seq_show(struct seq_file *seq, void *v)
{
struct net *net = (struct net *)seq->private;
struct trie *trie_local, *trie_main;
struct trie_stat *stat;
struct fib_table *tb;
trie_local = NULL;
tb = fib_get_table(net, RT_TABLE_LOCAL);
if (tb)
trie_local = (struct trie *) tb->tb_data;
trie_main = NULL;
tb = fib_get_table(net, RT_TABLE_MAIN);
if (tb)
trie_main = (struct trie *) tb->tb_data;
stat = kmalloc(sizeof(*stat), GFP_KERNEL);
if (!stat)
return -ENOMEM;
seq_printf(seq, "Basic info: size of leaf: %Zd bytes, size of tnode: %Zd bytes.\n",
seq_printf(seq,
"Basic info: size of leaf: %Zd bytes, size of tnode: %Zd bytes.\n",
sizeof(struct leaf), sizeof(struct tnode));
if (trie_local) {
seq_printf(seq, "Local:\n");
trie_collect_stats(trie_local, stat);
trie_show_stats(seq, stat);
#ifdef CONFIG_IP_FIB_TRIE_STATS
trie_show_usage(seq, &trie_local->stats);
#endif
}
tb = fib_get_table(net, RT_TABLE_LOCAL);
if (tb)
fib_trie_show(seq, "Local", (struct trie *) tb->tb_data);
if (trie_main) {
seq_printf(seq, "Main:\n");
trie_collect_stats(trie_main, stat);
trie_show_stats(seq, stat);
#ifdef CONFIG_IP_FIB_TRIE_STATS
trie_show_usage(seq, &trie_main->stats);
#endif
}
kfree(stat);
tb = fib_get_table(net, RT_TABLE_MAIN);
if (tb)
fib_trie_show(seq, "Main", (struct trie *) tb->tb_data);
return 0;
}