[IPV4]: FIB trie cleanup
This is a redo of earlier cleanup stuff:
* replace DBG() macro with pr_debug()
* get rid of duplicate extern's that are already in fib_lookup.h
* use BUG_ON and WARN_ON
* don't use BUG checks for null pointers where next statement would
get a fault anyway
* remove debug printout when rebalance causes deep tree
* remove trailing blanks
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 395f64d..9c4c7f0 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -157,10 +157,6 @@
unsigned int revision;
};
-static int trie_debug = 0;
-
-#define DBG(x...) do { if (trie_debug) printk(x); } while (0)
-
static void put_child(struct trie *t, struct tnode *tn, int i, struct node *n);
static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int wasfull);
static struct node *resize(struct trie *t, struct tnode *tn);
@@ -168,12 +164,6 @@
static struct tnode *halve(struct trie *t, struct tnode *tn);
static void tnode_free(struct tnode *tn);
static void trie_dump_seq(struct seq_file *seq, struct trie *t);
-extern struct fib_alias *fib_find_alias(struct list_head *fah, u8 tos, u32 prio);
-extern int fib_detect_death(struct fib_info *fi, int order,
- struct fib_info **last_resort, int *last_idx, int *dflt);
-
-extern void rtmsg_fib(int event, u32 key, struct fib_alias *fa, int z, int tb_id,
- struct nlmsghdr *n, struct netlink_skb_parms *req);
static kmem_cache_t *fn_alias_kmem;
static struct trie *trie_local = NULL, *trie_main = NULL;
@@ -294,11 +284,9 @@
*/
-static void check_tnode(struct tnode *tn)
+static inline void check_tnode(const struct tnode *tn)
{
- if (tn && tn->pos+tn->bits > 32) {
- printk("TNODE ERROR tn=%p, pos=%d, bits=%d\n", tn, tn->pos, tn->bits);
- }
+ WARN_ON(tn && tn->pos+tn->bits > 32);
}
static int halve_threshold = 25;
@@ -374,21 +362,19 @@
tn->empty_children = 1<<bits;
}
- DBG("AT %p s=%u %u\n", tn, (unsigned int) sizeof(struct tnode),
- (unsigned int) (sizeof(struct node) * 1<<bits));
+ pr_debug("AT %p s=%u %u\n", tn, (unsigned int) sizeof(struct tnode),
+ (unsigned int) (sizeof(struct node) * 1<<bits));
return tn;
}
static void tnode_free(struct tnode *tn)
{
- BUG_ON(!tn);
-
if (IS_LEAF(tn)) {
free_leaf((struct leaf *)tn);
- DBG("FL %p \n", tn);
+ pr_debug("FL %p \n", tn);
} else {
__tnode_free(tn);
- DBG("FT %p \n", tn);
+ pr_debug("FT %p \n", tn);
}
}
@@ -420,10 +406,8 @@
struct node *chi;
int isfull;
- if (i >= 1<<tn->bits) {
- printk("bits=%d, i=%d\n", tn->bits, i);
- BUG();
- }
+ BUG_ON(i >= 1<<tn->bits);
+
write_lock_bh(&fib_lock);
chi = tn->child[i];
@@ -459,8 +443,8 @@
if (!tn)
return NULL;
- DBG("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
- tn, inflate_threshold, halve_threshold);
+ pr_debug("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
+ tn, inflate_threshold, halve_threshold);
/* No children */
if (tn->empty_children == tnode_child_length(tn)) {
@@ -625,11 +609,11 @@
int olen = tnode_child_length(tn);
int i;
- DBG("In inflate\n");
+ pr_debug("In inflate\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits + 1);
- if (!tn)
+ if (!tn)
return ERR_PTR(-ENOMEM);
/*
@@ -749,12 +733,12 @@
int size = tnode_child_length(tn);
int j;
- for(j = 0; j < size; j++)
+ for (j = 0; j < size; j++)
if (tn->child[j])
tnode_free((struct tnode *)tn->child[j]);
tnode_free(tn);
-
+
return ERR_PTR(-ENOMEM);
}
}
@@ -766,7 +750,7 @@
int i;
int olen = tnode_child_length(tn);
- DBG("In halve\n");
+ pr_debug("In halve\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits - 1);
@@ -785,14 +769,14 @@
right = tnode_get_child(oldtnode, i+1);
/* Two nonempty children */
- if (left && right) {
+ if (left && right) {
struct tnode *newn;
-
+
newn = tnode_new(left->key, tn->pos + tn->bits, 1);
-
- if (!newn)
+
+ if (!newn)
goto nomem;
-
+
put_child(t, tn, i/2, (struct node *)newn);
}
@@ -810,7 +794,7 @@
continue;
put_child(t, tn, i/2, right);
continue;
- }
+ }
if (right == NULL) {
put_child(t, tn, i/2, left);
@@ -820,9 +804,6 @@
/* Two nonempty children */
newBinNode = (struct tnode *) tnode_get_child(tn, i/2);
put_child(t, tn, i/2, NULL);
-
- BUG_ON(!newBinNode);
-
put_child(t, newBinNode, 0, left);
put_child(t, newBinNode, 1, right);
put_child(t, tn, i/2, resize(t, newBinNode));
@@ -834,12 +815,12 @@
int size = tnode_child_length(tn);
int j;
- for(j = 0; j < size; j++)
+ for (j = 0; j < size; j++)
if (tn->child[j])
tnode_free((struct tnode *)tn->child[j]);
tnode_free(tn);
-
+
return ERR_PTR(-ENOMEM);
}
}
@@ -939,22 +920,10 @@
t_key cindex, key;
struct tnode *tp = NULL;
- BUG_ON(!tn);
-
key = tn->key;
i = 0;
while (tn != NULL && NODE_PARENT(tn) != NULL) {
- if (i > 10) {
- printk("Rebalance tn=%p \n", tn);
- if (tn)
- printk("tn->parent=%p \n", NODE_PARENT(tn));
-
- printk("Rebalance tp=%p \n", tp);
- if (tp)
- printk("tp->parent=%p \n", NODE_PARENT(tp));
- }
-
BUG_ON(i > 12); /* Why is this a bug? -ojn */
i++;
@@ -1019,10 +988,7 @@
pos = tn->pos + tn->bits;
n = tnode_get_child(tn, tkey_extract_bits(key, tn->pos, tn->bits));
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
+ BUG_ON(n && NODE_PARENT(n) != tn);
} else
break;
}
@@ -1076,8 +1042,6 @@
NODE_SET_PARENT(l, tp);
- BUG_ON(!tp);
-
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
put_child(t, (struct tnode *)tp, cindex, (struct node *)l);
} else {
@@ -1158,7 +1122,7 @@
key = ntohl(key);
- DBG("Insert table=%d %08x/%d\n", tb->tb_id, key, plen);
+ pr_debug("Insert table=%d %08x/%d\n", tb->tb_id, key, plen);
mask = ntohl(inet_make_mask(plen));
@@ -1282,7 +1246,8 @@
return err;
}
-static inline int check_leaf(struct trie *t, struct leaf *l, t_key key, int *plen, const struct flowi *flp,
+static inline int check_leaf(struct trie *t, struct leaf *l,
+ t_key key, int *plen, const struct flowi *flp,
struct fib_result *res)
{
int err, i;
@@ -1511,7 +1476,7 @@
struct node *n = t->trie;
struct leaf *l;
- DBG("entering trie_leaf_remove(%p)\n", n);
+ pr_debug("entering trie_leaf_remove(%p)\n", n);
/* Note that in the case skipped bits, those bits are *not* checked!
* When we finish this, we will have NULL or a T_LEAF, and the
@@ -1523,10 +1488,7 @@
check_tnode(tn);
n = tnode_get_child(tn ,tkey_extract_bits(key, tn->pos, tn->bits));
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
+ BUG_ON(n && NODE_PARENT(n) != tn);
}
l = (struct leaf *) n;
@@ -1594,7 +1556,7 @@
if (!fa)
return -ESRCH;
- DBG("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
+ pr_debug("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
fa_to_delete = NULL;
fa_head = fa->fa_list.prev;
@@ -1762,7 +1724,7 @@
if (ll && hlist_empty(&ll->list))
trie_leaf_remove(t, ll->key);
- DBG("trie_flush found=%d\n", found);
+ pr_debug("trie_flush found=%d\n", found);
return found;
}