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https://github.com/torvalds/linux
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fib_trie: Rename tnode to key_vector
Rename the tnode to key_vector. The key_vector will be the eventual container for all of the information needed by either a leaf or a tnode. The final result should be much smaller than the 40 bytes currently needed for either one. This also updates the trie struct so that it contains an array of size 1 of tnode pointers. This is to bring the structure more inline with how an actual tnode itself is configured. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck
David S. Miller
parent
8d8e810ca8
commit
35c6edac19
1 changed files with 128 additions and 119 deletions
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@ -94,12 +94,12 @@ typedef unsigned int t_key;
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#define get_index(_key, _kv) (((_key) ^ (_kv)->key) >> (_kv)->pos)
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struct tnode {
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struct key_vector {
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struct rcu_head rcu;
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t_key empty_children; /* KEYLENGTH bits needed */
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t_key full_children; /* KEYLENGTH bits needed */
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struct tnode __rcu *parent;
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struct key_vector __rcu *parent;
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t_key key;
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unsigned char pos; /* 2log(KEYLENGTH) bits needed */
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@ -109,11 +109,11 @@ struct tnode {
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/* This list pointer if valid if (pos | bits) == 0 (LEAF) */
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struct hlist_head leaf;
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/* This array is valid if (pos | bits) > 0 (TNODE) */
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struct tnode __rcu *tnode[0];
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struct key_vector __rcu *tnode[0];
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};
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};
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#define TNODE_SIZE(n) offsetof(struct tnode, tnode[n])
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#define TNODE_SIZE(n) offsetof(struct key_vector, tnode[n])
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#define LEAF_SIZE TNODE_SIZE(1)
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#ifdef CONFIG_IP_FIB_TRIE_STATS
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@ -138,13 +138,13 @@ struct trie_stat {
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};
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struct trie {
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struct tnode __rcu *trie;
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struct key_vector __rcu *tnode[1];
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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 struct tnode **resize(struct trie *t, struct tnode *tn);
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static struct key_vector **resize(struct trie *t, struct key_vector *tn);
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static size_t tnode_free_size;
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/*
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@ -164,7 +164,7 @@ static struct kmem_cache *trie_leaf_kmem __read_mostly;
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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 tnode *n, struct tnode *tp)
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static inline void node_set_parent(struct key_vector *n, struct key_vector *tp)
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{
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if (n)
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rcu_assign_pointer(n->parent, tp);
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@ -175,21 +175,21 @@ static inline void node_set_parent(struct tnode *n, struct tnode *tp)
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/* This provides us with the number of children in this node, in the case of a
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* leaf this will return 0 meaning none of the children are accessible.
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*/
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static inline unsigned long tnode_child_length(const struct tnode *tn)
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static inline unsigned long tnode_child_length(const struct key_vector *tn)
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{
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return (1ul << tn->bits) & ~(1ul);
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}
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/* caller must hold RTNL */
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static inline struct tnode *tnode_get_child(const struct tnode *tn,
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unsigned long i)
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static inline struct key_vector *tnode_get_child(struct key_vector *tn,
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unsigned long i)
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{
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return rtnl_dereference(tn->tnode[i]);
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}
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/* caller must hold RCU read lock or RTNL */
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static inline struct tnode *tnode_get_child_rcu(const struct tnode *tn,
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unsigned long i)
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static inline struct key_vector *tnode_get_child_rcu(struct key_vector *tn,
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unsigned long i)
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{
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return rcu_dereference_rtnl(tn->tnode[i]);
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}
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@ -277,13 +277,13 @@ static inline void alias_free_mem_rcu(struct fib_alias *fa)
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}
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#define TNODE_KMALLOC_MAX \
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ilog2((PAGE_SIZE - TNODE_SIZE(0)) / sizeof(struct tnode *))
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ilog2((PAGE_SIZE - TNODE_SIZE(0)) / sizeof(struct key_vector *))
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#define TNODE_VMALLOC_MAX \
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ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct tnode *))
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ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
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static void __node_free_rcu(struct rcu_head *head)
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{
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struct tnode *n = container_of(head, struct tnode, rcu);
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struct key_vector *n = container_of(head, struct key_vector, rcu);
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if (IS_LEAF(n))
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kmem_cache_free(trie_leaf_kmem, n);
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@ -295,7 +295,7 @@ static void __node_free_rcu(struct rcu_head *head)
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#define node_free(n) call_rcu(&n->rcu, __node_free_rcu)
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static struct tnode *tnode_alloc(int bits)
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static struct key_vector *tnode_alloc(int bits)
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{
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size_t size;
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@ -312,19 +312,19 @@ static struct tnode *tnode_alloc(int bits)
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return vzalloc(size);
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}
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static inline void empty_child_inc(struct tnode *n)
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static inline void empty_child_inc(struct key_vector *n)
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{
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++n->empty_children ? : ++n->full_children;
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}
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static inline void empty_child_dec(struct tnode *n)
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static inline void empty_child_dec(struct key_vector *n)
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{
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n->empty_children-- ? : n->full_children--;
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}
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static struct tnode *leaf_new(t_key key, struct fib_alias *fa)
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static struct key_vector *leaf_new(t_key key, struct fib_alias *fa)
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{
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struct tnode *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
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struct key_vector *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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@ -344,9 +344,9 @@ static struct tnode *leaf_new(t_key key, struct fib_alias *fa)
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return l;
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}
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static struct tnode *tnode_new(t_key key, int pos, int bits)
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static struct key_vector *tnode_new(t_key key, int pos, int bits)
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{
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struct tnode *tn = tnode_alloc(bits);
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struct key_vector *tn = tnode_alloc(bits);
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unsigned int shift = pos + bits;
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/* verify bits and pos their msb bits clear and values are valid */
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@ -365,14 +365,14 @@ static struct tnode *tnode_new(t_key key, int pos, int bits)
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}
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pr_debug("AT %p s=%zu %zu\n", tn, TNODE_SIZE(0),
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sizeof(struct tnode *) << bits);
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sizeof(struct key_vector *) << bits);
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return tn;
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}
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/* Check whether a tnode 'n' is "full", i.e. it is an internal node
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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 tnode *n)
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static inline int tnode_full(struct key_vector *tn, struct key_vector *n)
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{
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return n && ((n->pos + n->bits) == tn->pos) && IS_TNODE(n);
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}
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@ -380,9 +380,10 @@ static inline int tnode_full(const struct tnode *tn, const struct tnode *n)
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/* Add a child at position i overwriting the old value.
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* Update the value of full_children and empty_children.
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*/
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static void put_child(struct tnode *tn, unsigned long i, struct tnode *n)
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static void put_child(struct key_vector *tn, unsigned long i,
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struct key_vector *n)
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{
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struct tnode *chi = tnode_get_child(tn, i);
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struct key_vector *chi = tnode_get_child(tn, i);
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int isfull, wasfull;
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BUG_ON(i >= tnode_child_length(tn));
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@ -408,13 +409,13 @@ static void put_child(struct tnode *tn, unsigned long i, struct tnode *n)
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rcu_assign_pointer(tn->tnode[i], n);
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}
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static void update_children(struct tnode *tn)
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static void update_children(struct key_vector *tn)
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{
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unsigned long i;
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/* update all of the child parent pointers */
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for (i = tnode_child_length(tn); i;) {
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struct tnode *inode = tnode_get_child(tn, --i);
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struct key_vector *inode = tnode_get_child(tn, --i);
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if (!inode)
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continue;
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@ -430,27 +431,28 @@ static void update_children(struct tnode *tn)
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}
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}
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static inline void put_child_root(struct tnode *tp, struct trie *t,
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t_key key, struct tnode *n)
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static inline void put_child_root(struct key_vector *tp, struct trie *t,
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t_key key, struct key_vector *n)
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{
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if (tp)
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put_child(tp, get_index(key, tp), n);
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else
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rcu_assign_pointer(t->trie, n);
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rcu_assign_pointer(t->tnode[0], n);
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}
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static inline void tnode_free_init(struct tnode *tn)
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static inline void tnode_free_init(struct key_vector *tn)
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{
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tn->rcu.next = NULL;
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}
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static inline void tnode_free_append(struct tnode *tn, struct tnode *n)
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static inline void tnode_free_append(struct key_vector *tn,
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struct key_vector *n)
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{
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n->rcu.next = tn->rcu.next;
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tn->rcu.next = &n->rcu;
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}
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static void tnode_free(struct tnode *tn)
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static void tnode_free(struct key_vector *tn)
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{
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struct callback_head *head = &tn->rcu;
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@ -459,7 +461,7 @@ static void tnode_free(struct tnode *tn)
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tnode_free_size += TNODE_SIZE(1ul << tn->bits);
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node_free(tn);
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tn = container_of(head, struct tnode, rcu);
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tn = container_of(head, struct key_vector, rcu);
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}
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if (tnode_free_size >= PAGE_SIZE * sync_pages) {
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@ -468,11 +470,12 @@ static void tnode_free(struct tnode *tn)
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}
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}
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static struct tnode __rcu **replace(struct trie *t, struct tnode *oldtnode,
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struct tnode *tn)
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static struct key_vector __rcu **replace(struct trie *t,
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struct key_vector *oldtnode,
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struct key_vector *tn)
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{
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struct tnode *tp = node_parent(oldtnode);
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struct tnode **cptr;
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struct key_vector *tp = node_parent(oldtnode);
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struct key_vector **cptr;
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unsigned long i;
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/* setup the parent pointer out of and back into this node */
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@ -486,11 +489,11 @@ static struct tnode __rcu **replace(struct trie *t, struct tnode *oldtnode,
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tnode_free(oldtnode);
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/* record the pointer that is pointing to this node */
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cptr = tp ? tp->tnode : &t->trie;
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cptr = tp ? tp->tnode : t->tnode;
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/* resize children now that oldtnode is freed */
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for (i = tnode_child_length(tn); i;) {
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struct tnode *inode = tnode_get_child(tn, --i);
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struct key_vector *inode = tnode_get_child(tn, --i);
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/* resize child node */
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if (tnode_full(tn, inode))
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@ -500,9 +503,10 @@ static struct tnode __rcu **replace(struct trie *t, struct tnode *oldtnode,
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return cptr;
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}
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static struct tnode __rcu **inflate(struct trie *t, struct tnode *oldtnode)
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static struct key_vector __rcu **inflate(struct trie *t,
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struct key_vector *oldtnode)
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{
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struct tnode *tn;
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struct key_vector *tn;
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unsigned long i;
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t_key m;
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@ -521,8 +525,8 @@ static struct tnode __rcu **inflate(struct trie *t, struct tnode *oldtnode)
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* nodes.
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*/
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for (i = tnode_child_length(oldtnode), m = 1u << tn->pos; i;) {
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struct tnode *inode = tnode_get_child(oldtnode, --i);
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struct tnode *node0, *node1;
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struct key_vector *inode = tnode_get_child(oldtnode, --i);
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struct key_vector *node0, *node1;
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unsigned long j, k;
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/* An empty child */
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@ -595,9 +599,10 @@ static struct tnode __rcu **inflate(struct trie *t, struct tnode *oldtnode)
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return NULL;
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}
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static struct tnode __rcu **halve(struct trie *t, struct tnode *oldtnode)
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static struct key_vector __rcu **halve(struct trie *t,
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struct key_vector *oldtnode)
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{
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struct tnode *tn;
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struct key_vector *tn;
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unsigned long i;
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pr_debug("In halve\n");
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@ -615,9 +620,9 @@ static struct tnode __rcu **halve(struct trie *t, struct tnode *oldtnode)
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* nodes.
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*/
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for (i = tnode_child_length(oldtnode); i;) {
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struct tnode *node1 = tnode_get_child(oldtnode, --i);
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struct tnode *node0 = tnode_get_child(oldtnode, --i);
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struct tnode *inode;
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struct key_vector *node1 = tnode_get_child(oldtnode, --i);
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struct key_vector *node0 = tnode_get_child(oldtnode, --i);
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struct key_vector *inode;
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/* At least one of the children is empty */
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if (!node1 || !node0) {
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@ -649,9 +654,9 @@ static struct tnode __rcu **halve(struct trie *t, struct tnode *oldtnode)
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return NULL;
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}
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static void collapse(struct trie *t, struct tnode *oldtnode)
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static void collapse(struct trie *t, struct key_vector *oldtnode)
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{
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struct tnode *n, *tp;
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struct key_vector *n, *tp;
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unsigned long i;
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/* scan the tnode looking for that one child that might still exist */
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@ -667,7 +672,7 @@ static void collapse(struct trie *t, struct tnode *oldtnode)
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node_free(oldtnode);
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}
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static unsigned char update_suffix(struct tnode *tn)
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static unsigned char update_suffix(struct key_vector *tn)
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{
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unsigned char slen = tn->pos;
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unsigned long stride, i;
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@ -678,7 +683,7 @@ static unsigned char update_suffix(struct tnode *tn)
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* represent the nodes with suffix length equal to tn->pos
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*/
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for (i = 0, stride = 0x2ul ; i < tnode_child_length(tn); i += stride) {
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struct tnode *n = tnode_get_child(tn, i);
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struct key_vector *n = tnode_get_child(tn, i);
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if (!n || (n->slen <= slen))
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continue;
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@ -759,7 +764,7 @@ static unsigned char update_suffix(struct tnode *tn)
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* tnode_child_length(tn)
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*
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*/
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static bool should_inflate(const struct tnode *tp, const struct tnode *tn)
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static inline bool should_inflate(struct key_vector *tp, struct key_vector *tn)
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{
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unsigned long used = tnode_child_length(tn);
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unsigned long threshold = used;
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@ -774,7 +779,7 @@ static bool should_inflate(const struct tnode *tp, const struct tnode *tn)
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return (used > 1) && tn->pos && ((50 * used) >= threshold);
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}
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static bool should_halve(const struct tnode *tp, const struct tnode *tn)
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static inline bool should_halve(struct key_vector *tp, struct key_vector *tn)
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{
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unsigned long used = tnode_child_length(tn);
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unsigned long threshold = used;
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@ -788,7 +793,7 @@ static bool should_halve(const struct tnode *tp, const struct tnode *tn)
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return (used > 1) && (tn->bits > 1) && ((100 * used) < threshold);
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}
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static bool should_collapse(const struct tnode *tn)
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static inline bool should_collapse(struct key_vector *tn)
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{
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unsigned long used = tnode_child_length(tn);
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@ -803,14 +808,15 @@ static bool should_collapse(const struct tnode *tn)
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}
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#define MAX_WORK 10
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static struct tnode __rcu **resize(struct trie *t, struct tnode *tn)
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static struct key_vector __rcu **resize(struct trie *t,
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struct key_vector *tn)
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{
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#ifdef CONFIG_IP_FIB_TRIE_STATS
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struct trie_use_stats __percpu *stats = t->stats;
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#endif
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struct tnode *tp = node_parent(tn);
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struct key_vector *tp = node_parent(tn);
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unsigned long cindex = tp ? get_index(tn->key, tp) : 0;
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struct tnode __rcu **cptr = tp ? tp->tnode : &t->trie;
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struct key_vector __rcu **cptr = tp ? tp->tnode : t->tnode;
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int max_work = MAX_WORK;
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pr_debug("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
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@ -826,7 +832,7 @@ static struct tnode __rcu **resize(struct trie *t, struct tnode *tn)
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* nonempty nodes that are above the threshold.
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*/
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while (should_inflate(tp, tn) && max_work) {
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struct tnode __rcu **tcptr = inflate(t, tn);
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struct key_vector __rcu **tcptr = inflate(t, tn);
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if (!tcptr) {
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#ifdef CONFIG_IP_FIB_TRIE_STATS
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|
@ -848,7 +854,7 @@ static struct tnode __rcu **resize(struct trie *t, struct tnode *tn)
|
|||
* node is above threshold.
|
||||
*/
|
||||
while (should_halve(tp, tn) && max_work) {
|
||||
struct tnode __rcu **tcptr = halve(t, tn);
|
||||
struct key_vector __rcu **tcptr = halve(t, tn);
|
||||
|
||||
if (!tcptr) {
|
||||
#ifdef CONFIG_IP_FIB_TRIE_STATS
|
||||
|
|
@ -883,7 +889,7 @@ static struct tnode __rcu **resize(struct trie *t, struct tnode *tn)
|
|||
return cptr;
|
||||
}
|
||||
|
||||
static void leaf_pull_suffix(struct tnode *tp, struct tnode *l)
|
||||
static void leaf_pull_suffix(struct key_vector *tp, struct key_vector *l)
|
||||
{
|
||||
while (tp && (tp->slen > tp->pos) && (tp->slen > l->slen)) {
|
||||
if (update_suffix(tp) > l->slen)
|
||||
|
|
@ -892,7 +898,7 @@ static void leaf_pull_suffix(struct tnode *tp, struct tnode *l)
|
|||
}
|
||||
}
|
||||
|
||||
static void leaf_push_suffix(struct tnode *tn, struct tnode *l)
|
||||
static void leaf_push_suffix(struct key_vector *tn, struct key_vector *l)
|
||||
{
|
||||
/* if this is a new leaf then tn will be NULL and we can sort
|
||||
* out parent suffix lengths as a part of trie_rebalance
|
||||
|
|
@ -904,9 +910,10 @@ static void leaf_push_suffix(struct tnode *tn, struct tnode *l)
|
|||
}
|
||||
|
||||
/* rcu_read_lock needs to be hold by caller from readside */
|
||||
static struct tnode *fib_find_node(struct trie *t, struct tnode **tn, u32 key)
|
||||
static struct key_vector *fib_find_node(struct trie *t,
|
||||
struct key_vector **tp, u32 key)
|
||||
{
|
||||
struct tnode *pn = NULL, *n = rcu_dereference_rtnl(t->trie);
|
||||
struct key_vector *pn = NULL, *n = rcu_dereference_rtnl(t->tnode[0]);
|
||||
|
||||
while (n) {
|
||||
unsigned long index = get_index(key, n);
|
||||
|
|
@ -938,7 +945,7 @@ static struct tnode *fib_find_node(struct trie *t, struct tnode **tn, u32 key)
|
|||
n = tnode_get_child_rcu(n, index);
|
||||
}
|
||||
|
||||
*tn = pn;
|
||||
*tp = pn;
|
||||
|
||||
return n;
|
||||
}
|
||||
|
|
@ -968,24 +975,24 @@ static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 slen,
|
|||
return NULL;
|
||||
}
|
||||
|
||||
static void trie_rebalance(struct trie *t, struct tnode *tn)
|
||||
static void trie_rebalance(struct trie *t, struct key_vector *tn)
|
||||
{
|
||||
struct tnode __rcu **cptr = &t->trie;
|
||||
struct key_vector __rcu **cptr = t->tnode;
|
||||
|
||||
while (tn) {
|
||||
struct tnode *tp = node_parent(tn);
|
||||
struct key_vector *tp = node_parent(tn);
|
||||
|
||||
cptr = resize(t, tn);
|
||||
if (!tp)
|
||||
break;
|
||||
tn = container_of(cptr, struct tnode, tnode[0]);
|
||||
tn = container_of(cptr, struct key_vector, tnode[0]);
|
||||
}
|
||||
}
|
||||
|
||||
static int fib_insert_node(struct trie *t, struct tnode *tp,
|
||||
static int fib_insert_node(struct trie *t, struct key_vector *tp,
|
||||
struct fib_alias *new, t_key key)
|
||||
{
|
||||
struct tnode *n, *l;
|
||||
struct key_vector *n, *l;
|
||||
|
||||
l = leaf_new(key, new);
|
||||
if (!l)
|
||||
|
|
@ -995,7 +1002,7 @@ static int fib_insert_node(struct trie *t, struct tnode *tp,
|
|||
if (tp)
|
||||
n = tnode_get_child(tp, get_index(key, tp));
|
||||
else
|
||||
n = rcu_dereference_rtnl(t->trie);
|
||||
n = rcu_dereference_rtnl(t->tnode[0]);
|
||||
|
||||
/* Case 2: n is a LEAF or a TNODE and the key doesn't match.
|
||||
*
|
||||
|
|
@ -1004,7 +1011,7 @@ static int fib_insert_node(struct trie *t, struct tnode *tp,
|
|||
* leaves us in position for handling as case 3
|
||||
*/
|
||||
if (n) {
|
||||
struct tnode *tn;
|
||||
struct key_vector *tn;
|
||||
|
||||
tn = tnode_new(key, __fls(key ^ n->key), 1);
|
||||
if (!tn)
|
||||
|
|
@ -1034,8 +1041,8 @@ static int fib_insert_node(struct trie *t, struct tnode *tp,
|
|||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static int fib_insert_alias(struct trie *t, struct tnode *tp,
|
||||
struct tnode *l, struct fib_alias *new,
|
||||
static int fib_insert_alias(struct trie *t, struct key_vector *tp,
|
||||
struct key_vector *l, struct fib_alias *new,
|
||||
struct fib_alias *fa, t_key key)
|
||||
{
|
||||
if (!l)
|
||||
|
|
@ -1072,7 +1079,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
|
|||
{
|
||||
struct trie *t = (struct trie *)tb->tb_data;
|
||||
struct fib_alias *fa, *new_fa;
|
||||
struct tnode *l, *tp;
|
||||
struct key_vector *l, *tp;
|
||||
struct fib_info *fi;
|
||||
u8 plen = cfg->fc_dst_len;
|
||||
u8 slen = KEYLENGTH - plen;
|
||||
|
|
@ -1237,7 +1244,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
|
|||
return err;
|
||||
}
|
||||
|
||||
static inline t_key prefix_mismatch(t_key key, struct tnode *n)
|
||||
static inline t_key prefix_mismatch(t_key key, struct key_vector *n)
|
||||
{
|
||||
t_key prefix = n->key;
|
||||
|
||||
|
|
@ -1253,12 +1260,12 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
|
|||
struct trie_use_stats __percpu *stats = t->stats;
|
||||
#endif
|
||||
const t_key key = ntohl(flp->daddr);
|
||||
struct tnode *n, *pn;
|
||||
struct key_vector *n, *pn;
|
||||
struct fib_alias *fa;
|
||||
unsigned long index;
|
||||
t_key cindex;
|
||||
|
||||
n = rcu_dereference(t->trie);
|
||||
n = rcu_dereference(t->tnode[0]);
|
||||
if (!n)
|
||||
return -EAGAIN;
|
||||
|
||||
|
|
@ -1310,7 +1317,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
|
|||
/* Step 2: Sort out leaves and begin backtracing for longest prefix */
|
||||
for (;;) {
|
||||
/* record the pointer where our next node pointer is stored */
|
||||
struct tnode __rcu **cptr = n->tnode;
|
||||
struct key_vector __rcu **cptr = n->tnode;
|
||||
|
||||
/* This test verifies that none of the bits that differ
|
||||
* between the key and the prefix exist in the region of
|
||||
|
|
@ -1419,8 +1426,8 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(fib_table_lookup);
|
||||
|
||||
static void fib_remove_alias(struct trie *t, struct tnode *tp,
|
||||
struct tnode *l, struct fib_alias *old)
|
||||
static void fib_remove_alias(struct trie *t, struct key_vector *tp,
|
||||
struct key_vector *l, struct fib_alias *old)
|
||||
{
|
||||
/* record the location of the previous list_info entry */
|
||||
struct hlist_node **pprev = old->fa_list.pprev;
|
||||
|
|
@ -1453,7 +1460,7 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
|
|||
{
|
||||
struct trie *t = (struct trie *) tb->tb_data;
|
||||
struct fib_alias *fa, *fa_to_delete;
|
||||
struct tnode *l, *tp;
|
||||
struct key_vector *l, *tp;
|
||||
u8 plen = cfg->fc_dst_len;
|
||||
u8 slen = KEYLENGTH - plen;
|
||||
u8 tos = cfg->fc_tos;
|
||||
|
|
@ -1520,9 +1527,9 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
|
|||
}
|
||||
|
||||
/* Scan for the next leaf starting at the provided key value */
|
||||
static struct tnode *leaf_walk_rcu(struct tnode **tn, t_key key)
|
||||
static struct key_vector *leaf_walk_rcu(struct key_vector **tn, t_key key)
|
||||
{
|
||||
struct tnode *pn, *n = *tn;
|
||||
struct key_vector *pn, *n = *tn;
|
||||
unsigned long cindex;
|
||||
|
||||
/* record parent node for backtracing */
|
||||
|
|
@ -1588,10 +1595,10 @@ void fib_table_flush_external(struct fib_table *tb)
|
|||
{
|
||||
struct trie *t = (struct trie *)tb->tb_data;
|
||||
struct fib_alias *fa;
|
||||
struct tnode *n, *pn;
|
||||
struct key_vector *n, *pn;
|
||||
unsigned long cindex;
|
||||
|
||||
n = rcu_dereference(t->trie);
|
||||
n = rcu_dereference(t->tnode[0]);
|
||||
if (!n)
|
||||
return;
|
||||
|
||||
|
|
@ -1642,14 +1649,14 @@ void fib_table_flush_external(struct fib_table *tb)
|
|||
int fib_table_flush(struct fib_table *tb)
|
||||
{
|
||||
struct trie *t = (struct trie *)tb->tb_data;
|
||||
struct key_vector *n, *pn;
|
||||
struct hlist_node *tmp;
|
||||
struct fib_alias *fa;
|
||||
struct tnode *n, *pn;
|
||||
unsigned long cindex;
|
||||
unsigned char slen;
|
||||
int found = 0;
|
||||
|
||||
n = rcu_dereference(t->trie);
|
||||
n = rcu_dereference(t->tnode[0]);
|
||||
if (!n)
|
||||
goto flush_complete;
|
||||
|
||||
|
|
@ -1664,7 +1671,7 @@ int fib_table_flush(struct fib_table *tb)
|
|||
/* walk trie in reverse order */
|
||||
do {
|
||||
while (!(cindex--)) {
|
||||
struct tnode __rcu **cptr;
|
||||
struct key_vector __rcu **cptr;
|
||||
t_key pkey = pn->key;
|
||||
|
||||
n = pn;
|
||||
|
|
@ -1677,7 +1684,8 @@ int fib_table_flush(struct fib_table *tb)
|
|||
if (!pn)
|
||||
goto flush_complete;
|
||||
|
||||
pn = container_of(cptr, struct tnode, tnode[0]);
|
||||
pn = container_of(cptr, struct key_vector,
|
||||
tnode[0]);
|
||||
cindex = get_index(pkey, pn);
|
||||
}
|
||||
|
||||
|
|
@ -1742,7 +1750,7 @@ void fib_free_table(struct fib_table *tb)
|
|||
call_rcu(&tb->rcu, __trie_free_rcu);
|
||||
}
|
||||
|
||||
static int fn_trie_dump_leaf(struct tnode *l, struct fib_table *tb,
|
||||
static int fn_trie_dump_leaf(struct key_vector *l, struct fib_table *tb,
|
||||
struct sk_buff *skb, struct netlink_callback *cb)
|
||||
{
|
||||
__be32 xkey = htonl(l->key);
|
||||
|
|
@ -1783,14 +1791,14 @@ int fib_table_dump(struct fib_table *tb, struct sk_buff *skb,
|
|||
struct netlink_callback *cb)
|
||||
{
|
||||
struct trie *t = (struct trie *)tb->tb_data;
|
||||
struct tnode *l, *tp;
|
||||
struct key_vector *l, *tp;
|
||||
/* Dump starting at last key.
|
||||
* Note: 0.0.0.0/0 (ie default) is first key.
|
||||
*/
|
||||
int count = cb->args[2];
|
||||
t_key key = cb->args[3];
|
||||
|
||||
tp = rcu_dereference_rtnl(t->trie);
|
||||
tp = rcu_dereference_rtnl(t->tnode[0]);
|
||||
|
||||
while ((l = leaf_walk_rcu(&tp, key)) != NULL) {
|
||||
if (fn_trie_dump_leaf(l, tb, skb, cb) < 0) {
|
||||
|
|
@ -1843,7 +1851,7 @@ struct fib_table *fib_trie_table(u32 id)
|
|||
tb->tb_num_default = 0;
|
||||
|
||||
t = (struct trie *) tb->tb_data;
|
||||
RCU_INIT_POINTER(t->trie, NULL);
|
||||
RCU_INIT_POINTER(t->tnode[0], NULL);
|
||||
#ifdef CONFIG_IP_FIB_TRIE_STATS
|
||||
t->stats = alloc_percpu(struct trie_use_stats);
|
||||
if (!t->stats) {
|
||||
|
|
@ -1860,16 +1868,16 @@ struct fib_table *fib_trie_table(u32 id)
|
|||
struct fib_trie_iter {
|
||||
struct seq_net_private p;
|
||||
struct fib_table *tb;
|
||||
struct tnode *tnode;
|
||||
struct key_vector *tnode;
|
||||
unsigned int index;
|
||||
unsigned int depth;
|
||||
};
|
||||
|
||||
static struct tnode *fib_trie_get_next(struct fib_trie_iter *iter)
|
||||
static struct key_vector *fib_trie_get_next(struct fib_trie_iter *iter)
|
||||
{
|
||||
unsigned long cindex = iter->index;
|
||||
struct tnode *tn = iter->tnode;
|
||||
struct tnode *p;
|
||||
struct key_vector *tn = iter->tnode;
|
||||
struct key_vector *p;
|
||||
|
||||
/* A single entry routing table */
|
||||
if (!tn)
|
||||
|
|
@ -1879,7 +1887,7 @@ static struct tnode *fib_trie_get_next(struct fib_trie_iter *iter)
|
|||
iter->tnode, iter->index, iter->depth);
|
||||
rescan:
|
||||
while (cindex < tnode_child_length(tn)) {
|
||||
struct tnode *n = tnode_get_child_rcu(tn, cindex);
|
||||
struct key_vector *n = tnode_get_child_rcu(tn, cindex);
|
||||
|
||||
if (n) {
|
||||
if (IS_LEAF(n)) {
|
||||
|
|
@ -1910,15 +1918,15 @@ static struct tnode *fib_trie_get_next(struct fib_trie_iter *iter)
|
|||
return NULL;
|
||||
}
|
||||
|
||||
static struct tnode *fib_trie_get_first(struct fib_trie_iter *iter,
|
||||
struct trie *t)
|
||||
static struct key_vector *fib_trie_get_first(struct fib_trie_iter *iter,
|
||||
struct trie *t)
|
||||
{
|
||||
struct tnode *n;
|
||||
struct key_vector *n;
|
||||
|
||||
if (!t)
|
||||
return NULL;
|
||||
|
||||
n = rcu_dereference(t->trie);
|
||||
n = rcu_dereference(t->tnode[0]);
|
||||
if (!n)
|
||||
return NULL;
|
||||
|
||||
|
|
@ -1937,7 +1945,7 @@ static struct tnode *fib_trie_get_first(struct fib_trie_iter *iter,
|
|||
|
||||
static void trie_collect_stats(struct trie *t, struct trie_stat *s)
|
||||
{
|
||||
struct tnode *n;
|
||||
struct key_vector *n;
|
||||
struct fib_trie_iter iter;
|
||||
|
||||
memset(s, 0, sizeof(*s));
|
||||
|
|
@ -2002,7 +2010,7 @@ 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 tnode *) * pointers;
|
||||
bytes += sizeof(struct key_vector *) * pointers;
|
||||
seq_printf(seq, "Null ptrs: %u\n", stat->nullpointers);
|
||||
seq_printf(seq, "Total size: %u kB\n", (bytes + 1023) / 1024);
|
||||
}
|
||||
|
|
@ -2095,7 +2103,7 @@ static const struct file_operations fib_triestat_fops = {
|
|||
.release = single_release_net,
|
||||
};
|
||||
|
||||
static struct tnode *fib_trie_get_idx(struct seq_file *seq, loff_t pos)
|
||||
static struct key_vector *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);
|
||||
|
|
@ -2107,7 +2115,7 @@ static struct tnode *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 tnode *n;
|
||||
struct key_vector *n;
|
||||
|
||||
for (n = fib_trie_get_first(iter,
|
||||
(struct trie *) tb->tb_data);
|
||||
|
|
@ -2136,7 +2144,7 @@ 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 tnode *n;
|
||||
struct key_vector *n;
|
||||
|
||||
++*pos;
|
||||
/* next node in same table */
|
||||
|
|
@ -2222,7 +2230,7 @@ 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 tnode *n = v;
|
||||
struct key_vector *n = v;
|
||||
|
||||
if (!node_parent_rcu(n))
|
||||
fib_table_print(seq, iter->tb);
|
||||
|
|
@ -2284,15 +2292,16 @@ static const struct file_operations fib_trie_fops = {
|
|||
struct fib_route_iter {
|
||||
struct seq_net_private p;
|
||||
struct fib_table *main_tb;
|
||||
struct tnode *tnode;
|
||||
struct key_vector *tnode;
|
||||
loff_t pos;
|
||||
t_key key;
|
||||
};
|
||||
|
||||
static struct tnode *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos)
|
||||
static struct key_vector *fib_route_get_idx(struct fib_route_iter *iter,
|
||||
loff_t pos)
|
||||
{
|
||||
struct fib_table *tb = iter->main_tb;
|
||||
struct tnode *l, **tp = &iter->tnode;
|
||||
struct key_vector *l, **tp = &iter->tnode;
|
||||
struct trie *t;
|
||||
t_key key;
|
||||
|
||||
|
|
@ -2302,7 +2311,7 @@ static struct tnode *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos)
|
|||
key = iter->key;
|
||||
} else {
|
||||
t = (struct trie *)tb->tb_data;
|
||||
iter->tnode = rcu_dereference_rtnl(t->trie);
|
||||
iter->tnode = rcu_dereference_rtnl(t->tnode[0]);
|
||||
iter->pos = 0;
|
||||
key = 0;
|
||||
}
|
||||
|
|
@ -2348,7 +2357,7 @@ static void *fib_route_seq_start(struct seq_file *seq, loff_t *pos)
|
|||
return fib_route_get_idx(iter, *pos);
|
||||
|
||||
t = (struct trie *)tb->tb_data;
|
||||
iter->tnode = rcu_dereference_rtnl(t->trie);
|
||||
iter->tnode = rcu_dereference_rtnl(t->tnode[0]);
|
||||
iter->pos = 0;
|
||||
iter->key = 0;
|
||||
|
||||
|
|
@ -2358,7 +2367,7 @@ 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 tnode *l = NULL;
|
||||
struct key_vector *l = NULL;
|
||||
t_key key = iter->key;
|
||||
|
||||
++*pos;
|
||||
|
|
@ -2406,7 +2415,7 @@ 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 fib_alias *fa;
|
||||
struct tnode *l = v;
|
||||
struct key_vector *l = v;
|
||||
__be32 prefix;
|
||||
|
||||
if (v == SEQ_START_TOKEN) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue