mirror of https://github.com/hak5/openwrt.git
929 lines
27 KiB
Diff
929 lines
27 KiB
Diff
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From: Alexander Duyck <alexander.h.duyck@redhat.com>
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Date: Wed, 31 Dec 2014 10:55:47 -0800
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Subject: [PATCH] fib_trie: Merge leaf into tnode
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This change makes it so that leaf and tnode are the same struct. As a
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result there is no need for rt_trie_node anymore since everyting can be
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merged into tnode.
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On 32b systems this results in the leaf being 4 bytes larger, however I
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don't know if that is really an issue as this and an eariler patch that
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added bits & pos have increased the size from 20 to 28. If I am not
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mistaken slub/slab allocate on power of 2 sizes so 20 was likely being
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rounded up to 32 anyway.
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Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/net/ipv4/fib_trie.c
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+++ b/net/ipv4/fib_trie.c
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@@ -96,32 +96,16 @@ struct tnode {
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unsigned char pos; /* 2log(KEYLENGTH) bits needed */
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struct tnode __rcu *parent;
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struct rcu_head rcu;
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- /* everything above this comment must be the same as rt_trie_node */
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- unsigned int full_children; /* KEYLENGTH bits needed */
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- unsigned int empty_children; /* KEYLENGTH bits needed */
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- struct rt_trie_node __rcu *child[0];
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-};
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-
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-/* This struct represents the shared bits between tnode and leaf. If any
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- * ordering is changed here is must also be updated in tnode and leaf as
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- * well.
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- */
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-struct rt_trie_node {
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- t_key key;
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- unsigned char bits;
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- unsigned char pos;
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- struct tnode __rcu *parent;
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- struct rcu_head rcu;
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-};
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-
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-struct leaf {
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- t_key key;
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- unsigned char bits;
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- unsigned char pos;
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- struct tnode __rcu *parent;
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- struct rcu_head rcu;
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- /* everything above this comment must be the same as rt_trie_node */
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- struct hlist_head list;
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+ union {
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+ /* The fields in this struct are valid if bits > 0 (TNODE) */
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+ struct {
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+ unsigned int full_children; /* KEYLENGTH bits needed */
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+ unsigned int empty_children; /* KEYLENGTH bits needed */
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+ struct tnode __rcu *child[0];
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+ };
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+ /* This list pointer if valid if bits == 0 (LEAF) */
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+ struct hlist_head list;
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+ };
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};
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struct leaf_info {
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@@ -154,15 +138,15 @@ struct trie_stat {
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};
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struct trie {
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- struct rt_trie_node __rcu *trie;
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+ struct tnode __rcu *trie;
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#ifdef CONFIG_IP_FIB_TRIE_STATS
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struct trie_use_stats __percpu *stats;
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#endif
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};
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-static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n,
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+static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n,
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int wasfull);
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-static struct rt_trie_node *resize(struct trie *t, struct tnode *tn);
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+static struct tnode *resize(struct trie *t, struct tnode *tn);
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static struct tnode *inflate(struct trie *t, struct tnode *tn);
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static struct tnode *halve(struct trie *t, struct tnode *tn);
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/* tnodes to free after resize(); protected by RTNL */
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@@ -186,10 +170,10 @@ static struct kmem_cache *trie_leaf_kmem
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#define node_parent_rcu(n) rcu_dereference_rtnl((n)->parent)
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/* wrapper for rcu_assign_pointer */
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-static inline void node_set_parent(struct rt_trie_node *node, struct tnode *ptr)
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+static inline void node_set_parent(struct tnode *n, struct tnode *tp)
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{
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- if (node)
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- rcu_assign_pointer(node->parent, ptr);
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+ if (n)
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+ rcu_assign_pointer(n->parent, tp);
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}
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#define NODE_INIT_PARENT(n, p) RCU_INIT_POINTER((n)->parent, p)
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@@ -205,7 +189,7 @@ static inline int tnode_child_length(con
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/*
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* caller must hold RTNL
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*/
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-static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsigned int i)
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+static inline struct tnode *tnode_get_child(const struct tnode *tn, unsigned int i)
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{
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BUG_ON(i >= tnode_child_length(tn));
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@@ -215,7 +199,7 @@ static inline struct rt_trie_node *tnode
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/*
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* caller must hold RCU read lock or RTNL
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*/
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-static inline struct rt_trie_node *tnode_get_child_rcu(const struct tnode *tn, unsigned int i)
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+static inline struct tnode *tnode_get_child_rcu(const struct tnode *tn, unsigned int i)
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{
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BUG_ON(i >= tnode_child_length(tn));
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@@ -340,11 +324,11 @@ static inline void alias_free_mem_rcu(st
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}
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#define TNODE_KMALLOC_MAX \
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- ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct rt_trie_node *))
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+ ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct tnode *))
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static void __node_free_rcu(struct rcu_head *head)
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{
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- struct rt_trie_node *n = container_of(head, struct rt_trie_node, rcu);
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+ struct tnode *n = container_of(head, struct tnode, rcu);
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if (IS_LEAF(n))
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kmem_cache_free(trie_leaf_kmem, n);
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@@ -395,9 +379,9 @@ static void tnode_free_flush(void)
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}
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}
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-static struct leaf *leaf_new(t_key key)
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+static struct tnode *leaf_new(t_key key)
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{
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- struct leaf *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
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+ struct tnode *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
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if (l) {
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l->parent = NULL;
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/* set key and pos to reflect full key value
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@@ -444,7 +428,7 @@ static struct tnode *tnode_new(t_key key
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}
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pr_debug("AT %p s=%zu %zu\n", tn, sizeof(struct tnode),
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- sizeof(struct rt_trie_node *) << bits);
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+ sizeof(struct tnode *) << bits);
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return tn;
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}
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@@ -453,13 +437,13 @@ static struct tnode *tnode_new(t_key key
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* and no bits are skipped. See discussion in dyntree paper p. 6
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*/
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-static inline int tnode_full(const struct tnode *tn, const struct rt_trie_node *n)
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+static inline int tnode_full(const struct tnode *tn, const struct tnode *n)
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{
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return n && IS_TNODE(n) && (n->pos == (tn->pos + tn->bits));
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}
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static inline void put_child(struct tnode *tn, int i,
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- struct rt_trie_node *n)
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+ struct tnode *n)
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{
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tnode_put_child_reorg(tn, i, n, -1);
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}
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@@ -469,10 +453,10 @@ static inline void put_child(struct tnod
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* Update the value of full_children and empty_children.
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*/
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-static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n,
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+static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n,
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int wasfull)
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{
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- struct rt_trie_node *chi = rtnl_dereference(tn->child[i]);
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+ struct tnode *chi = rtnl_dereference(tn->child[i]);
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int isfull;
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BUG_ON(i >= 1<<tn->bits);
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@@ -499,10 +483,9 @@ static void tnode_put_child_reorg(struct
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}
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#define MAX_WORK 10
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-static struct rt_trie_node *resize(struct trie *t, struct tnode *tn)
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+static struct tnode *resize(struct trie *t, struct tnode *tn)
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{
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- struct rt_trie_node *n = NULL;
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- struct tnode *old_tn;
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+ struct tnode *old_tn, *n = NULL;
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int inflate_threshold_use;
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int halve_threshold_use;
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int max_work;
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@@ -614,7 +597,7 @@ static struct rt_trie_node *resize(struc
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/* Return if at least one inflate is run */
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if (max_work != MAX_WORK)
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- return (struct rt_trie_node *) tn;
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+ return tn;
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/*
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* Halve as long as the number of empty children in this
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@@ -650,13 +633,13 @@ no_children:
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tnode_free_safe(tn);
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return n;
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}
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- return (struct rt_trie_node *) tn;
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+ return tn;
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}
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static void tnode_clean_free(struct tnode *tn)
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{
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- struct rt_trie_node *tofree;
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+ struct tnode *tofree;
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int i;
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for (i = 0; i < tnode_child_length(tn); i++) {
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@@ -667,10 +650,10 @@ static void tnode_clean_free(struct tnod
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node_free(tn);
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}
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-static struct tnode *inflate(struct trie *t, struct tnode *tn)
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+static struct tnode *inflate(struct trie *t, struct tnode *oldtnode)
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{
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- struct tnode *oldtnode = tn;
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- int olen = tnode_child_length(tn);
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+ int olen = tnode_child_length(oldtnode);
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+ struct tnode *tn;
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int i;
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pr_debug("In inflate\n");
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@@ -690,11 +673,8 @@ static struct tnode *inflate(struct trie
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for (i = 0; i < olen; i++) {
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struct tnode *inode;
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- inode = (struct tnode *) tnode_get_child(oldtnode, i);
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- if (inode &&
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- IS_TNODE(inode) &&
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- inode->pos == oldtnode->pos + oldtnode->bits &&
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- inode->bits > 1) {
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+ inode = tnode_get_child(oldtnode, i);
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+ if (tnode_full(oldtnode, inode) && inode->bits > 1) {
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struct tnode *left, *right;
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t_key m = ~0U << (KEYLENGTH - 1) >> inode->pos;
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@@ -711,33 +691,29 @@ static struct tnode *inflate(struct trie
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goto nomem;
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}
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- put_child(tn, 2*i, (struct rt_trie_node *) left);
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- put_child(tn, 2*i+1, (struct rt_trie_node *) right);
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+ put_child(tn, 2*i, left);
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+ put_child(tn, 2*i+1, right);
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}
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}
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for (i = 0; i < olen; i++) {
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- struct tnode *inode;
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- struct rt_trie_node *node = tnode_get_child(oldtnode, i);
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+ struct tnode *inode = tnode_get_child(oldtnode, i);
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struct tnode *left, *right;
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int size, j;
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/* An empty child */
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- if (node == NULL)
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+ if (inode == NULL)
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continue;
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/* A leaf or an internal node with skipped bits */
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-
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- if (IS_LEAF(node) || (node->pos > (tn->pos + tn->bits - 1))) {
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+ if (!tnode_full(oldtnode, inode)) {
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put_child(tn,
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- tkey_extract_bits(node->key, oldtnode->pos, oldtnode->bits + 1),
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- node);
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+ tkey_extract_bits(inode->key, tn->pos, tn->bits),
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+ inode);
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continue;
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}
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/* An internal node with two children */
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- inode = (struct tnode *) node;
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-
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if (inode->bits == 1) {
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put_child(tn, 2*i, rtnl_dereference(inode->child[0]));
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put_child(tn, 2*i+1, rtnl_dereference(inode->child[1]));
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@@ -769,12 +745,12 @@ static struct tnode *inflate(struct trie
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* bit to zero.
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*/
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- left = (struct tnode *) tnode_get_child(tn, 2*i);
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+ left = tnode_get_child(tn, 2*i);
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put_child(tn, 2*i, NULL);
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BUG_ON(!left);
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- right = (struct tnode *) tnode_get_child(tn, 2*i+1);
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+ right = tnode_get_child(tn, 2*i+1);
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put_child(tn, 2*i+1, NULL);
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BUG_ON(!right);
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@@ -796,12 +772,11 @@ nomem:
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return ERR_PTR(-ENOMEM);
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}
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-static struct tnode *halve(struct trie *t, struct tnode *tn)
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+static struct tnode *halve(struct trie *t, struct tnode *oldtnode)
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{
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- struct tnode *oldtnode = tn;
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- struct rt_trie_node *left, *right;
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+ int olen = tnode_child_length(oldtnode);
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+ struct tnode *tn, *left, *right;
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int i;
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- int olen = tnode_child_length(tn);
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pr_debug("In halve\n");
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@@ -830,7 +805,7 @@ static struct tnode *halve(struct trie *
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if (!newn)
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goto nomem;
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- put_child(tn, i/2, (struct rt_trie_node *)newn);
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+ put_child(tn, i/2, newn);
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}
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}
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@@ -855,7 +830,7 @@ static struct tnode *halve(struct trie *
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}
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/* Two nonempty children */
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- newBinNode = (struct tnode *) tnode_get_child(tn, i/2);
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+ newBinNode = tnode_get_child(tn, i/2);
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put_child(tn, i/2, NULL);
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put_child(newBinNode, 0, left);
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put_child(newBinNode, 1, right);
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|
@@ -871,7 +846,7 @@ nomem:
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|
/* readside must use rcu_read_lock currently dump routines
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via get_fa_head and dump */
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|
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-static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
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+static struct leaf_info *find_leaf_info(struct tnode *l, int plen)
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{
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struct hlist_head *head = &l->list;
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|
struct leaf_info *li;
|
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|
@@ -883,7 +858,7 @@ static struct leaf_info *find_leaf_info(
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return NULL;
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}
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|
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||
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-static inline struct list_head *get_fa_head(struct leaf *l, int plen)
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+static inline struct list_head *get_fa_head(struct tnode *l, int plen)
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{
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struct leaf_info *li = find_leaf_info(l, plen);
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|
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@@ -915,32 +890,25 @@ static void insert_leaf_info(struct hlis
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|
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||
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/* rcu_read_lock needs to be hold by caller from readside */
|
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|
|
||
|
-static struct leaf *
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|
-fib_find_node(struct trie *t, u32 key)
|
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|
+static struct tnode *fib_find_node(struct trie *t, u32 key)
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|
{
|
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|
- int pos;
|
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|
- struct tnode *tn;
|
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|
- struct rt_trie_node *n;
|
||
|
-
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|
- pos = 0;
|
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|
- n = rcu_dereference_rtnl(t->trie);
|
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+ struct tnode *n = rcu_dereference_rtnl(t->trie);
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+ int pos = 0;
|
||
|
|
||
|
while (n && IS_TNODE(n)) {
|
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|
- tn = (struct tnode *) n;
|
||
|
-
|
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|
- if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
|
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|
- pos = tn->pos + tn->bits;
|
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|
- n = tnode_get_child_rcu(tn,
|
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|
+ if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) {
|
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|
+ 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 *
|
||
|
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 *
|
||
|
|
||
|
/* 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
|
||
|
{
|
||
|
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
|
||
|
*/
|
||
|
|
||
|
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
|
||
|
/* 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
|
||
|
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
|
||
|
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 *t
|
||
|
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 *t
|
||
|
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 *t
|
||
|
|
||
|
/* 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 *t
|
||
|
}
|
||
|
|
||
|
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 *t
|
||
|
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 *t
|
||
|
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_h
|
||
|
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 *
|
||
|
* 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
|
||
|
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(struc
|
||
|
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, in
|
||
|
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
|
||
|
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
|
||
|
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
|
||
|
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
|
||
|
|
||
|
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 tr
|
||
|
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 tr
|
||
|
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_f
|
||
|
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_f
|
||
|
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_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_
|
||
|
.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
|
||
|
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 se
|
||
|
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 */
|
||
|
@@ -2330,29 +2291,26 @@ static inline const char *rtn_type(char
|
||
|
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) {
|
||
|
@@ -2402,9 +2360,9 @@ 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 */
|
||
|
@@ -2449,7 +2407,7 @@ static void *fib_route_seq_start(struct
|
||
|
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) {
|
||
|
@@ -2495,7 +2453,7 @@ static unsigned int fib_flag_trans(int t
|
||
|
*/
|
||
|
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) {
|