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Message-ID: <20141222174117.1119.48584.stgit@ahduyck-vm-fedora20>
Date: Mon, 22 Dec 2014 09:41:17 -0800
From: Alexander Duyck <alexander.h.duyck@...hat.com>
To: netdev@...r.kernel.org
Subject: [RFC PATCH 04/17] fib_trie: Merge leaf into tnode
This change makes it so that leaf and tnode are the same struct. As a
result there is no need for rt_trie_node anymore since everyting can be
merged into tnode.
On 32b systems this results in the leaf being 4 bytes larger, however I
don't know if that is really an issue as this and an eariler patch that
added bits & pos have increased the size from 20 to 28. If I am not
mistaken slub/slab allocate on power of 2 sizes so 20 was likely being
rounded up to 32 anyway.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...hat.com>
---
net/ipv4/fib_trie.c | 322 ++++++++++++++++++++++-----------------------------
1 file changed, 140 insertions(+), 182 deletions(-)
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index bedb6c9..1c7bf43 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -96,32 +96,16 @@ struct tnode {
unsigned char pos; /* 2log(KEYLENGTH) bits needed */
struct tnode __rcu *parent;
struct rcu_head rcu;
- /* everything above this comment must be the same as rt_trie_node */
- unsigned int full_children; /* KEYLENGTH bits needed */
- unsigned int empty_children; /* KEYLENGTH bits needed */
- struct rt_trie_node __rcu *child[0];
-};
-
-/* This struct represents the shared bits between tnode and leaf. If any
- * ordering is changed here is must also be updated in tnode and leaf as
- * well.
- */
-struct rt_trie_node {
- t_key key;
- unsigned char bits;
- unsigned char pos;
- struct tnode __rcu *parent;
- struct rcu_head rcu;
-};
-
-struct leaf {
- t_key key;
- unsigned char bits;
- unsigned char pos;
- struct tnode __rcu *parent;
- struct rcu_head rcu;
- /* everything above this comment must be the same as rt_trie_node */
- struct hlist_head list;
+ union {
+ /* The fields in this struct are valid if bits > 0 (TNODE) */
+ struct {
+ unsigned int full_children; /* KEYLENGTH bits needed */
+ unsigned int empty_children; /* KEYLENGTH bits needed */
+ struct tnode __rcu *child[0];
+ };
+ /* This list pointer if valid if bits == 0 (LEAF) */
+ struct hlist_head list;
+ };
};
struct leaf_info {
@@ -154,15 +138,15 @@ struct trie_stat {
};
struct trie {
- struct rt_trie_node __rcu *trie;
+ struct tnode __rcu *trie;
#ifdef CONFIG_IP_FIB_TRIE_STATS
struct trie_use_stats __percpu *stats;
#endif
};
-static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n,
+static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n,
int wasfull);
-static struct rt_trie_node *resize(struct trie *t, struct tnode *tn);
+static struct tnode *resize(struct trie *t, struct tnode *tn);
static struct tnode *inflate(struct trie *t, struct tnode *tn);
static struct tnode *halve(struct trie *t, struct tnode *tn);
/* tnodes to free after resize(); protected by RTNL */
@@ -186,10 +170,10 @@ static struct kmem_cache *trie_leaf_kmem __read_mostly;
#define node_parent_rcu(n) rcu_dereference_rtnl((n)->parent)
/* wrapper for rcu_assign_pointer */
-static inline void node_set_parent(struct rt_trie_node *node, struct tnode *ptr)
+static inline void node_set_parent(struct tnode *n, struct tnode *tp)
{
- if (node)
- rcu_assign_pointer(node->parent, ptr);
+ if (n)
+ rcu_assign_pointer(n->parent, tp);
}
#define NODE_INIT_PARENT(n, p) RCU_INIT_POINTER((n)->parent, p)
@@ -205,7 +189,7 @@ static inline int tnode_child_length(const struct tnode *tn)
/*
* caller must hold RTNL
*/
-static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsigned int i)
+static inline struct tnode *tnode_get_child(const struct tnode *tn, unsigned int i)
{
BUG_ON(i >= tnode_child_length(tn));
@@ -215,7 +199,7 @@ static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsig
/*
* caller must hold RCU read lock or RTNL
*/
-static inline struct rt_trie_node *tnode_get_child_rcu(const struct tnode *tn, unsigned int i)
+static inline struct tnode *tnode_get_child_rcu(const struct tnode *tn, unsigned int i)
{
BUG_ON(i >= tnode_child_length(tn));
@@ -340,11 +324,11 @@ static inline void alias_free_mem_rcu(struct fib_alias *fa)
}
#define TNODE_KMALLOC_MAX \
- ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct rt_trie_node *))
+ ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct tnode *))
static void __node_free_rcu(struct rcu_head *head)
{
- struct rt_trie_node *n = container_of(head, struct rt_trie_node, rcu);
+ struct tnode *n = container_of(head, struct tnode, rcu);
if (IS_LEAF(n))
kmem_cache_free(trie_leaf_kmem, n);
@@ -395,9 +379,9 @@ static void tnode_free_flush(void)
}
}
-static struct leaf *leaf_new(t_key key)
+static struct tnode *leaf_new(t_key key)
{
- struct leaf *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
+ struct tnode *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
if (l) {
l->parent = NULL;
/* set key and pos to reflect full key value
@@ -444,7 +428,7 @@ static struct tnode *tnode_new(t_key key, int pos, int bits)
}
pr_debug("AT %p s=%zu %zu\n", tn, sizeof(struct tnode),
- sizeof(struct rt_trie_node *) << bits);
+ sizeof(struct tnode *) << bits);
return tn;
}
@@ -453,13 +437,13 @@ static struct tnode *tnode_new(t_key key, int pos, int bits)
* and no bits are skipped. See discussion in dyntree paper p. 6
*/
-static inline int tnode_full(const struct tnode *tn, const struct rt_trie_node *n)
+static inline int tnode_full(const struct tnode *tn, const struct tnode *n)
{
return n && IS_TNODE(n) && (n->pos == (tn->pos + tn->bits));
}
static inline void put_child(struct tnode *tn, int i,
- struct rt_trie_node *n)
+ struct tnode *n)
{
tnode_put_child_reorg(tn, i, n, -1);
}
@@ -469,10 +453,10 @@ static inline void put_child(struct tnode *tn, int i,
* Update the value of full_children and empty_children.
*/
-static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n,
+static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n,
int wasfull)
{
- struct rt_trie_node *chi = rtnl_dereference(tn->child[i]);
+ struct tnode *chi = rtnl_dereference(tn->child[i]);
int isfull;
BUG_ON(i >= 1<<tn->bits);
@@ -499,10 +483,9 @@ static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *
}
#define MAX_WORK 10
-static struct rt_trie_node *resize(struct trie *t, struct tnode *tn)
+static struct tnode *resize(struct trie *t, struct tnode *tn)
{
- struct rt_trie_node *n = NULL;
- struct tnode *old_tn;
+ struct tnode *old_tn, *n = NULL;
int inflate_threshold_use;
int halve_threshold_use;
int max_work;
@@ -614,7 +597,7 @@ static struct rt_trie_node *resize(struct trie *t, struct tnode *tn)
/* Return if at least one inflate is run */
if (max_work != MAX_WORK)
- return (struct rt_trie_node *) tn;
+ return tn;
/*
* Halve as long as the number of empty children in this
@@ -650,13 +633,13 @@ no_children:
tnode_free_safe(tn);
return n;
}
- return (struct rt_trie_node *) tn;
+ return tn;
}
static void tnode_clean_free(struct tnode *tn)
{
- struct rt_trie_node *tofree;
+ struct tnode *tofree;
int i;
for (i = 0; i < tnode_child_length(tn); i++) {
@@ -667,10 +650,10 @@ static void tnode_clean_free(struct tnode *tn)
node_free(tn);
}
-static struct tnode *inflate(struct trie *t, struct tnode *tn)
+static struct tnode *inflate(struct trie *t, struct tnode *oldtnode)
{
- struct tnode *oldtnode = tn;
- int olen = tnode_child_length(tn);
+ int olen = tnode_child_length(oldtnode);
+ struct tnode *tn;
int i;
pr_debug("In inflate\n");
@@ -690,11 +673,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
for (i = 0; i < olen; i++) {
struct tnode *inode;
- inode = (struct tnode *) tnode_get_child(oldtnode, i);
- if (inode &&
- IS_TNODE(inode) &&
- inode->pos == oldtnode->pos + oldtnode->bits &&
- inode->bits > 1) {
+ inode = tnode_get_child(oldtnode, i);
+ if (tnode_full(oldtnode, inode) && inode->bits > 1) {
struct tnode *left, *right;
t_key m = ~0U << (KEYLENGTH - 1) >> inode->pos;
@@ -711,33 +691,29 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
goto nomem;
}
- put_child(tn, 2*i, (struct rt_trie_node *) left);
- put_child(tn, 2*i+1, (struct rt_trie_node *) right);
+ put_child(tn, 2*i, left);
+ put_child(tn, 2*i+1, right);
}
}
for (i = 0; i < olen; i++) {
- struct tnode *inode;
- struct rt_trie_node *node = tnode_get_child(oldtnode, i);
+ struct tnode *inode = tnode_get_child(oldtnode, i);
struct tnode *left, *right;
int size, j;
/* An empty child */
- if (node == NULL)
+ if (inode == NULL)
continue;
/* A leaf or an internal node with skipped bits */
-
- if (IS_LEAF(node) || (node->pos > (tn->pos + tn->bits - 1))) {
+ if (!tnode_full(oldtnode, inode)) {
put_child(tn,
- tkey_extract_bits(node->key, oldtnode->pos, oldtnode->bits + 1),
- node);
+ tkey_extract_bits(inode->key, tn->pos, tn->bits),
+ inode);
continue;
}
/* An internal node with two children */
- inode = (struct tnode *) node;
-
if (inode->bits == 1) {
put_child(tn, 2*i, rtnl_dereference(inode->child[0]));
put_child(tn, 2*i+1, rtnl_dereference(inode->child[1]));
@@ -769,12 +745,12 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
* bit to zero.
*/
- left = (struct tnode *) tnode_get_child(tn, 2*i);
+ left = tnode_get_child(tn, 2*i);
put_child(tn, 2*i, NULL);
BUG_ON(!left);
- right = (struct tnode *) tnode_get_child(tn, 2*i+1);
+ right = tnode_get_child(tn, 2*i+1);
put_child(tn, 2*i+1, NULL);
BUG_ON(!right);
@@ -796,12 +772,11 @@ nomem:
return ERR_PTR(-ENOMEM);
}
-static struct tnode *halve(struct trie *t, struct tnode *tn)
+static struct tnode *halve(struct trie *t, struct tnode *oldtnode)
{
- struct tnode *oldtnode = tn;
- struct rt_trie_node *left, *right;
+ int olen = tnode_child_length(oldtnode);
+ struct tnode *tn, *left, *right;
int i;
- int olen = tnode_child_length(tn);
pr_debug("In halve\n");
@@ -830,7 +805,7 @@ static struct tnode *halve(struct trie *t, struct tnode *tn)
if (!newn)
goto nomem;
- put_child(tn, i/2, (struct rt_trie_node *)newn);
+ put_child(tn, i/2, newn);
}
}
@@ -855,7 +830,7 @@ static struct tnode *halve(struct trie *t, struct tnode *tn)
}
/* Two nonempty children */
- newBinNode = (struct tnode *) tnode_get_child(tn, i/2);
+ newBinNode = tnode_get_child(tn, i/2);
put_child(tn, i/2, NULL);
put_child(newBinNode, 0, left);
put_child(newBinNode, 1, right);
@@ -871,7 +846,7 @@ nomem:
/* readside must use rcu_read_lock currently dump routines
via get_fa_head and dump */
-static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
+static struct leaf_info *find_leaf_info(struct tnode *l, int plen)
{
struct hlist_head *head = &l->list;
struct leaf_info *li;
@@ -883,7 +858,7 @@ static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
return NULL;
}
-static inline struct list_head *get_fa_head(struct leaf *l, int plen)
+static inline struct list_head *get_fa_head(struct tnode *l, int plen)
{
struct leaf_info *li = find_leaf_info(l, plen);
@@ -915,32 +890,25 @@ static void insert_leaf_info(struct hlist_head *head, struct leaf_info *new)
/* rcu_read_lock needs to be hold by caller from readside */
-static struct leaf *
-fib_find_node(struct trie *t, u32 key)
+static struct tnode *fib_find_node(struct trie *t, u32 key)
{
- int pos;
- struct tnode *tn;
- struct rt_trie_node *n;
-
- pos = 0;
- n = rcu_dereference_rtnl(t->trie);
+ struct tnode *n = rcu_dereference_rtnl(t->trie);
+ int pos = 0;
while (n && IS_TNODE(n)) {
- tn = (struct tnode *) n;
-
- if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
- pos = tn->pos + tn->bits;
- n = tnode_get_child_rcu(tn,
+ if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) {
+ pos = n->pos + n->bits;
+ n = tnode_get_child_rcu(n,
tkey_extract_bits(key,
- tn->pos,
- tn->bits));
+ n->pos,
+ n->bits));
} else
break;
}
/* Case we have found a leaf. Compare prefixes */
if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key))
- return (struct leaf *)n;
+ return n;
return NULL;
}
@@ -956,14 +924,13 @@ static void trie_rebalance(struct trie *t, struct tnode *tn)
while (tn != NULL && (tp = node_parent(tn)) != NULL) {
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
wasfull = tnode_full(tp, tnode_get_child(tp, cindex));
- tn = (struct tnode *)resize(t, tn);
+ tn = resize(t, tn);
- tnode_put_child_reorg(tp, cindex,
- (struct rt_trie_node *)tn, wasfull);
+ tnode_put_child_reorg(tp, cindex, tn, wasfull);
tp = node_parent(tn);
if (!tp)
- rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn);
+ rcu_assign_pointer(t->trie, tn);
tnode_free_flush();
if (!tp)
@@ -973,9 +940,9 @@ static void trie_rebalance(struct trie *t, struct tnode *tn)
/* Handle last (top) tnode */
if (IS_TNODE(tn))
- tn = (struct tnode *)resize(t, tn);
+ tn = resize(t, tn);
- rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn);
+ rcu_assign_pointer(t->trie, tn);
tnode_free_flush();
}
@@ -985,8 +952,8 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
{
int pos, newpos;
struct tnode *tp = NULL, *tn = NULL;
- struct rt_trie_node *n;
- struct leaf *l;
+ struct tnode *n;
+ struct tnode *l;
int missbit;
struct list_head *fa_head = NULL;
struct leaf_info *li;
@@ -1014,17 +981,15 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
*/
while (n && IS_TNODE(n)) {
- tn = (struct tnode *) n;
-
- if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
- tp = tn;
- pos = tn->pos + tn->bits;
- n = tnode_get_child(tn,
+ if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) {
+ tp = n;
+ pos = n->pos + n->bits;
+ n = tnode_get_child(n,
tkey_extract_bits(key,
- tn->pos,
- tn->bits));
+ n->pos,
+ n->bits));
- BUG_ON(n && node_parent(n) != tn);
+ BUG_ON(n && node_parent(n) != tp);
} else
break;
}
@@ -1040,14 +1005,13 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
/* Case 1: n is a leaf. Compare prefixes */
if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) {
- l = (struct leaf *) n;
li = leaf_info_new(plen);
if (!li)
return NULL;
fa_head = &li->falh;
- insert_leaf_info(&l->list, li);
+ insert_leaf_info(&n->list, li);
goto done;
}
l = leaf_new(key);
@@ -1068,10 +1032,10 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
if (t->trie && n == NULL) {
/* Case 2: n is NULL, and will just insert a new leaf */
- node_set_parent((struct rt_trie_node *)l, tp);
+ node_set_parent(l, tp);
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
- put_child(tp, cindex, (struct rt_trie_node *)l);
+ put_child(tp, cindex, l);
} else {
/* Case 3: n is a LEAF or a TNODE and the key doesn't match. */
/*
@@ -1094,17 +1058,17 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
return NULL;
}
- node_set_parent((struct rt_trie_node *)tn, tp);
+ node_set_parent(tn, tp);
missbit = tkey_extract_bits(key, newpos, 1);
- put_child(tn, missbit, (struct rt_trie_node *)l);
+ put_child(tn, missbit, l);
put_child(tn, 1-missbit, n);
if (tp) {
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
- put_child(tp, cindex, (struct rt_trie_node *)tn);
+ put_child(tp, cindex, tn);
} else {
- rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn);
+ rcu_assign_pointer(t->trie, tn);
}
tp = tn;
@@ -1134,7 +1098,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
u8 tos = cfg->fc_tos;
u32 key, mask;
int err;
- struct leaf *l;
+ struct tnode *l;
if (plen > 32)
return -EINVAL;
@@ -1292,7 +1256,7 @@ err:
}
/* should be called with rcu_read_lock */
-static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
+static int check_leaf(struct fib_table *tb, struct trie *t, struct tnode *l,
t_key key, const struct flowi4 *flp,
struct fib_result *res, int fib_flags)
{
@@ -1365,7 +1329,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
struct trie_use_stats __percpu *stats = t->stats;
#endif
int ret;
- struct rt_trie_node *n;
+ struct tnode *n;
struct tnode *pn;
unsigned int pos, bits;
t_key key = ntohl(flp->daddr);
@@ -1387,11 +1351,11 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
/* Just a leaf? */
if (IS_LEAF(n)) {
- ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags);
+ ret = check_leaf(tb, t, n, key, flp, res, fib_flags);
goto found;
}
- pn = (struct tnode *) n;
+ pn = n;
chopped_off = 0;
while (pn) {
@@ -1412,13 +1376,13 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
}
if (IS_LEAF(n)) {
- ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags);
+ ret = check_leaf(tb, t, n, key, flp, res, fib_flags);
if (ret > 0)
goto backtrace;
goto found;
}
- cn = (struct tnode *)n;
+ cn = n;
/*
* It's a tnode, and we can do some extra checks here if we
@@ -1506,7 +1470,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
current_prefix_length = mp;
}
- pn = (struct tnode *)n; /* Descend */
+ pn = n; /* Descend */
chopped_off = 0;
continue;
@@ -1557,7 +1521,7 @@ EXPORT_SYMBOL_GPL(fib_table_lookup);
/*
* Remove the leaf and return parent.
*/
-static void trie_leaf_remove(struct trie *t, struct leaf *l)
+static void trie_leaf_remove(struct trie *t, struct tnode *l)
{
struct tnode *tp = node_parent(l);
@@ -1584,7 +1548,7 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
u8 tos = cfg->fc_tos;
struct fib_alias *fa, *fa_to_delete;
struct list_head *fa_head;
- struct leaf *l;
+ struct tnode *l;
struct leaf_info *li;
if (plen > 32)
@@ -1682,7 +1646,7 @@ static int trie_flush_list(struct list_head *head)
return found;
}
-static int trie_flush_leaf(struct leaf *l)
+static int trie_flush_leaf(struct tnode *l)
{
int found = 0;
struct hlist_head *lih = &l->list;
@@ -1704,7 +1668,7 @@ static int trie_flush_leaf(struct leaf *l)
* Scan for the next right leaf starting at node p->child[idx]
* Since we have back pointer, no recursion necessary.
*/
-static struct leaf *leaf_walk_rcu(struct tnode *p, struct rt_trie_node *c)
+static struct tnode *leaf_walk_rcu(struct tnode *p, struct tnode *c)
{
do {
t_key idx;
@@ -1720,47 +1684,46 @@ static struct leaf *leaf_walk_rcu(struct tnode *p, struct rt_trie_node *c)
continue;
if (IS_LEAF(c))
- return (struct leaf *) c;
+ return c;
/* Rescan start scanning in new node */
- p = (struct tnode *) c;
+ p = c;
idx = 0;
}
/* Node empty, walk back up to parent */
- c = (struct rt_trie_node *) p;
+ c = p;
} while ((p = node_parent_rcu(c)) != NULL);
return NULL; /* Root of trie */
}
-static struct leaf *trie_firstleaf(struct trie *t)
+static struct tnode *trie_firstleaf(struct trie *t)
{
- struct tnode *n = (struct tnode *)rcu_dereference_rtnl(t->trie);
+ struct tnode *n = rcu_dereference_rtnl(t->trie);
if (!n)
return NULL;
if (IS_LEAF(n)) /* trie is just a leaf */
- return (struct leaf *) n;
+ return n;
return leaf_walk_rcu(n, NULL);
}
-static struct leaf *trie_nextleaf(struct leaf *l)
+static struct tnode *trie_nextleaf(struct tnode *l)
{
- struct rt_trie_node *c = (struct rt_trie_node *) l;
- struct tnode *p = node_parent_rcu(c);
+ struct tnode *p = node_parent_rcu(l);
if (!p)
return NULL; /* trie with just one leaf */
- return leaf_walk_rcu(p, c);
+ return leaf_walk_rcu(p, l);
}
-static struct leaf *trie_leafindex(struct trie *t, int index)
+static struct tnode *trie_leafindex(struct trie *t, int index)
{
- struct leaf *l = trie_firstleaf(t);
+ struct tnode *l = trie_firstleaf(t);
while (l && index-- > 0)
l = trie_nextleaf(l);
@@ -1775,7 +1738,7 @@ static struct leaf *trie_leafindex(struct trie *t, int index)
int fib_table_flush(struct fib_table *tb)
{
struct trie *t = (struct trie *) tb->tb_data;
- struct leaf *l, *ll = NULL;
+ struct tnode *l, *ll = NULL;
int found = 0;
for (l = trie_firstleaf(t); l; l = trie_nextleaf(l)) {
@@ -1840,7 +1803,7 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah,
return skb->len;
}
-static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb,
+static int fn_trie_dump_leaf(struct tnode *l, struct fib_table *tb,
struct sk_buff *skb, struct netlink_callback *cb)
{
struct leaf_info *li;
@@ -1876,7 +1839,7 @@ static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb,
int fib_table_dump(struct fib_table *tb, struct sk_buff *skb,
struct netlink_callback *cb)
{
- struct leaf *l;
+ struct tnode *l;
struct trie *t = (struct trie *) tb->tb_data;
t_key key = cb->args[2];
int count = cb->args[3];
@@ -1922,7 +1885,7 @@ void __init fib_trie_init(void)
0, SLAB_PANIC, NULL);
trie_leaf_kmem = kmem_cache_create("ip_fib_trie",
- max(sizeof(struct leaf),
+ max(sizeof(struct tnode),
sizeof(struct leaf_info)),
0, SLAB_PANIC, NULL);
}
@@ -1965,7 +1928,7 @@ struct fib_trie_iter {
unsigned int depth;
};
-static struct rt_trie_node *fib_trie_get_next(struct fib_trie_iter *iter)
+static struct tnode *fib_trie_get_next(struct fib_trie_iter *iter)
{
struct tnode *tn = iter->tnode;
unsigned int cindex = iter->index;
@@ -1979,7 +1942,7 @@ static struct rt_trie_node *fib_trie_get_next(struct fib_trie_iter *iter)
iter->tnode, iter->index, iter->depth);
rescan:
while (cindex < (1<<tn->bits)) {
- struct rt_trie_node *n = tnode_get_child_rcu(tn, cindex);
+ struct tnode *n = tnode_get_child_rcu(tn, cindex);
if (n) {
if (IS_LEAF(n)) {
@@ -1987,7 +1950,7 @@ rescan:
iter->index = cindex + 1;
} else {
/* push down one level */
- iter->tnode = (struct tnode *) n;
+ iter->tnode = n;
iter->index = 0;
++iter->depth;
}
@@ -1998,7 +1961,7 @@ rescan:
}
/* Current node exhausted, pop back up */
- p = node_parent_rcu((struct rt_trie_node *)tn);
+ p = node_parent_rcu(tn);
if (p) {
cindex = tkey_extract_bits(tn->key, p->pos, p->bits)+1;
tn = p;
@@ -2010,10 +1973,10 @@ rescan:
return NULL;
}
-static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter,
+static struct tnode *fib_trie_get_first(struct fib_trie_iter *iter,
struct trie *t)
{
- struct rt_trie_node *n;
+ struct tnode *n;
if (!t)
return NULL;
@@ -2023,7 +1986,7 @@ static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter,
return NULL;
if (IS_TNODE(n)) {
- iter->tnode = (struct tnode *) n;
+ iter->tnode = n;
iter->index = 0;
iter->depth = 1;
} else {
@@ -2037,7 +2000,7 @@ static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter,
static void trie_collect_stats(struct trie *t, struct trie_stat *s)
{
- struct rt_trie_node *n;
+ struct tnode *n;
struct fib_trie_iter iter;
memset(s, 0, sizeof(*s));
@@ -2045,7 +2008,6 @@ static void trie_collect_stats(struct trie *t, struct trie_stat *s)
rcu_read_lock();
for (n = fib_trie_get_first(&iter, t); n; n = fib_trie_get_next(&iter)) {
if (IS_LEAF(n)) {
- struct leaf *l = (struct leaf *)n;
struct leaf_info *li;
s->leaves++;
@@ -2053,18 +2015,17 @@ static void trie_collect_stats(struct trie *t, struct trie_stat *s)
if (iter.depth > s->maxdepth)
s->maxdepth = iter.depth;
- hlist_for_each_entry_rcu(li, &l->list, hlist)
+ hlist_for_each_entry_rcu(li, &n->list, hlist)
++s->prefixes;
} else {
- const struct tnode *tn = (const struct tnode *) n;
int i;
s->tnodes++;
- if (tn->bits < MAX_STAT_DEPTH)
- s->nodesizes[tn->bits]++;
+ if (n->bits < MAX_STAT_DEPTH)
+ s->nodesizes[n->bits]++;
- for (i = 0; i < (1<<tn->bits); i++)
- if (!tn->child[i])
+ for (i = 0; i < tnode_child_length(n); i++)
+ if (!rcu_access_pointer(n->child[i]))
s->nullpointers++;
}
}
@@ -2088,7 +2049,7 @@ static void trie_show_stats(struct seq_file *seq, struct trie_stat *stat)
seq_printf(seq, "\tMax depth: %u\n", stat->maxdepth);
seq_printf(seq, "\tLeaves: %u\n", stat->leaves);
- bytes = sizeof(struct leaf) * stat->leaves;
+ bytes = sizeof(struct tnode) * stat->leaves;
seq_printf(seq, "\tPrefixes: %u\n", stat->prefixes);
bytes += sizeof(struct leaf_info) * stat->prefixes;
@@ -2109,7 +2070,7 @@ static void trie_show_stats(struct seq_file *seq, struct trie_stat *stat)
seq_putc(seq, '\n');
seq_printf(seq, "\tPointers: %u\n", pointers);
- bytes += sizeof(struct rt_trie_node *) * pointers;
+ bytes += sizeof(struct tnode *) * pointers;
seq_printf(seq, "Null ptrs: %u\n", stat->nullpointers);
seq_printf(seq, "Total size: %u kB\n", (bytes + 1023) / 1024);
}
@@ -2163,7 +2124,7 @@ static int fib_triestat_seq_show(struct seq_file *seq, void *v)
seq_printf(seq,
"Basic info: size of leaf:"
" %Zd bytes, size of tnode: %Zd bytes.\n",
- sizeof(struct leaf), sizeof(struct tnode));
+ sizeof(struct tnode), sizeof(struct tnode));
for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
struct hlist_head *head = &net->ipv4.fib_table_hash[h];
@@ -2202,7 +2163,7 @@ static const struct file_operations fib_triestat_fops = {
.release = single_release_net,
};
-static struct rt_trie_node *fib_trie_get_idx(struct seq_file *seq, loff_t pos)
+static struct tnode *fib_trie_get_idx(struct seq_file *seq, loff_t pos)
{
struct fib_trie_iter *iter = seq->private;
struct net *net = seq_file_net(seq);
@@ -2214,7 +2175,7 @@ static struct rt_trie_node *fib_trie_get_idx(struct seq_file *seq, loff_t pos)
struct fib_table *tb;
hlist_for_each_entry_rcu(tb, head, tb_hlist) {
- struct rt_trie_node *n;
+ struct tnode *n;
for (n = fib_trie_get_first(iter,
(struct trie *) tb->tb_data);
@@ -2243,7 +2204,7 @@ static void *fib_trie_seq_next(struct seq_file *seq, void *v, loff_t *pos)
struct fib_table *tb = iter->tb;
struct hlist_node *tb_node;
unsigned int h;
- struct rt_trie_node *n;
+ struct tnode *n;
++*pos;
/* next node in same table */
@@ -2329,29 +2290,26 @@ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
static int fib_trie_seq_show(struct seq_file *seq, void *v)
{
const struct fib_trie_iter *iter = seq->private;
- struct rt_trie_node *n = v;
+ struct tnode *n = v;
if (!node_parent_rcu(n))
fib_table_print(seq, iter->tb);
if (IS_TNODE(n)) {
- struct tnode *tn = (struct tnode *) n;
- __be32 prf = htonl(tn->key);
+ __be32 prf = htonl(n->key);
- seq_indent(seq, iter->depth-1);
+ seq_indent(seq, iter->depth - 1);
seq_printf(seq, " +-- %pI4/%d %d %d %d\n",
- &prf, tn->pos, tn->bits, tn->full_children,
- tn->empty_children);
-
+ &prf, n->pos, n->bits, n->full_children,
+ n->empty_children);
} else {
- struct leaf *l = (struct leaf *) n;
struct leaf_info *li;
- __be32 val = htonl(l->key);
+ __be32 val = htonl(n->key);
seq_indent(seq, iter->depth);
seq_printf(seq, " |-- %pI4\n", &val);
- hlist_for_each_entry_rcu(li, &l->list, hlist) {
+ hlist_for_each_entry_rcu(li, &n->list, hlist) {
struct fib_alias *fa;
list_for_each_entry_rcu(fa, &li->falh, fa_list) {
@@ -2401,9 +2359,9 @@ struct fib_route_iter {
t_key key;
};
-static struct leaf *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos)
+static struct tnode *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos)
{
- struct leaf *l = NULL;
+ struct tnode *l = NULL;
struct trie *t = iter->main_trie;
/* use cache location of last found key */
@@ -2448,7 +2406,7 @@ static void *fib_route_seq_start(struct seq_file *seq, loff_t *pos)
static void *fib_route_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct fib_route_iter *iter = seq->private;
- struct leaf *l = v;
+ struct tnode *l = v;
++*pos;
if (v == SEQ_START_TOKEN) {
@@ -2494,7 +2452,7 @@ static unsigned int fib_flag_trans(int type, __be32 mask, const struct fib_info
*/
static int fib_route_seq_show(struct seq_file *seq, void *v)
{
- struct leaf *l = v;
+ struct tnode *l = v;
struct leaf_info *li;
if (v == SEQ_START_TOKEN) {
--
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