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author | Alexander Duyck <alexander.h.duyck@redhat.com> | 2014-12-31 10:55:47 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-12-31 18:25:54 -0500 |
commit | adaf981685b7b17d773d17f4ee6a128a3a6b6dc8 (patch) | |
tree | 71ad72ddfd5be1f59b009a75e16464fb6becf2d3 /net | |
parent | 37fd30f2da573c2625ed29561e5b8eb7b0258860 (diff) | |
download | linux-stable-adaf981685b7b17d773d17f4ee6a128a3a6b6dc8.tar.gz linux-stable-adaf981685b7b17d773d17f4ee6a128a3a6b6dc8.tar.bz2 linux-stable-adaf981685b7b17d773d17f4ee6a128a3a6b6dc8.zip |
fib_trie: Merge leaf into tnode
This change makes it so that leaf and tnode are the same struct. As a
result there is no need for rt_trie_node anymore since everyting can be
merged into tnode.
On 32b systems this results in the leaf being 4 bytes larger, however I
don't know if that is really an issue as this and an eariler patch that
added bits & pos have increased the size from 20 to 28. If I am not
mistaken slub/slab allocate on power of 2 sizes so 20 was likely being
rounded up to 32 anyway.
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/fib_trie.c | 322 |
1 files changed, 140 insertions, 182 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index d1a9907901cb..94c929f6c752 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -96,32 +96,16 @@ struct tnode { unsigned char pos; /* 2log(KEYLENGTH) bits needed */ struct tnode __rcu *parent; struct rcu_head rcu; - /* everything above this comment must be the same as rt_trie_node */ - unsigned int full_children; /* KEYLENGTH bits needed */ - unsigned int empty_children; /* KEYLENGTH bits needed */ - struct rt_trie_node __rcu *child[0]; -}; - -/* This struct represents the shared bits between tnode and leaf. If any - * ordering is changed here is must also be updated in tnode and leaf as - * well. - */ -struct rt_trie_node { - t_key key; - unsigned char bits; - unsigned char pos; - struct tnode __rcu *parent; - struct rcu_head rcu; -}; - -struct leaf { - t_key key; - unsigned char bits; - unsigned char pos; - struct tnode __rcu *parent; - struct rcu_head rcu; - /* everything above this comment must be the same as rt_trie_node */ - struct hlist_head list; + union { + /* The fields in this struct are valid if bits > 0 (TNODE) */ + struct { + unsigned int full_children; /* KEYLENGTH bits needed */ + unsigned int empty_children; /* KEYLENGTH bits needed */ + struct tnode __rcu *child[0]; + }; + /* This list pointer if valid if bits == 0 (LEAF) */ + struct hlist_head list; + }; }; struct leaf_info { @@ -154,15 +138,15 @@ struct trie_stat { }; struct trie { - struct rt_trie_node __rcu *trie; + struct tnode __rcu *trie; #ifdef CONFIG_IP_FIB_TRIE_STATS struct trie_use_stats __percpu *stats; #endif }; -static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n, +static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n, int wasfull); -static struct rt_trie_node *resize(struct trie *t, struct tnode *tn); +static struct tnode *resize(struct trie *t, struct tnode *tn); static struct tnode *inflate(struct trie *t, struct tnode *tn); static struct tnode *halve(struct trie *t, struct tnode *tn); /* tnodes to free after resize(); protected by RTNL */ @@ -186,10 +170,10 @@ static struct kmem_cache *trie_leaf_kmem __read_mostly; #define node_parent_rcu(n) rcu_dereference_rtnl((n)->parent) /* wrapper for rcu_assign_pointer */ -static inline void node_set_parent(struct rt_trie_node *node, struct tnode *ptr) +static inline void node_set_parent(struct tnode *n, struct tnode *tp) { - if (node) - rcu_assign_pointer(node->parent, ptr); + if (n) + rcu_assign_pointer(n->parent, tp); } #define NODE_INIT_PARENT(n, p) RCU_INIT_POINTER((n)->parent, p) @@ -205,7 +189,7 @@ static inline int tnode_child_length(const struct tnode *tn) /* * caller must hold RTNL */ -static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsigned int i) +static inline struct tnode *tnode_get_child(const struct tnode *tn, unsigned int i) { BUG_ON(i >= tnode_child_length(tn)); @@ -215,7 +199,7 @@ static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsig /* * caller must hold RCU read lock or RTNL */ -static inline struct rt_trie_node *tnode_get_child_rcu(const struct tnode *tn, unsigned int i) +static inline struct tnode *tnode_get_child_rcu(const struct tnode *tn, unsigned int i) { BUG_ON(i >= tnode_child_length(tn)); @@ -340,11 +324,11 @@ static inline void alias_free_mem_rcu(struct fib_alias *fa) } #define TNODE_KMALLOC_MAX \ - ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct rt_trie_node *)) + ilog2((PAGE_SIZE - sizeof(struct tnode)) / sizeof(struct tnode *)) static void __node_free_rcu(struct rcu_head *head) { - struct rt_trie_node *n = container_of(head, struct rt_trie_node, rcu); + struct tnode *n = container_of(head, struct tnode, rcu); if (IS_LEAF(n)) kmem_cache_free(trie_leaf_kmem, n); @@ -395,9 +379,9 @@ static void tnode_free_flush(void) } } -static struct leaf *leaf_new(t_key key) +static struct tnode *leaf_new(t_key key) { - struct leaf *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL); + struct tnode *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL); if (l) { l->parent = NULL; /* set key and pos to reflect full key value @@ -444,7 +428,7 @@ static struct tnode *tnode_new(t_key key, int pos, int bits) } pr_debug("AT %p s=%zu %zu\n", tn, sizeof(struct tnode), - sizeof(struct rt_trie_node *) << bits); + sizeof(struct tnode *) << bits); return tn; } @@ -453,13 +437,13 @@ static struct tnode *tnode_new(t_key key, int pos, int bits) * and no bits are skipped. See discussion in dyntree paper p. 6 */ -static inline int tnode_full(const struct tnode *tn, const struct rt_trie_node *n) +static inline int tnode_full(const struct tnode *tn, const struct tnode *n) { return n && IS_TNODE(n) && (n->pos == (tn->pos + tn->bits)); } static inline void put_child(struct tnode *tn, int i, - struct rt_trie_node *n) + struct tnode *n) { tnode_put_child_reorg(tn, i, n, -1); } @@ -469,10 +453,10 @@ static inline void put_child(struct tnode *tn, int i, * Update the value of full_children and empty_children. */ -static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n, +static void tnode_put_child_reorg(struct tnode *tn, int i, struct tnode *n, int wasfull) { - struct rt_trie_node *chi = rtnl_dereference(tn->child[i]); + struct tnode *chi = rtnl_dereference(tn->child[i]); int isfull; BUG_ON(i >= 1<<tn->bits); @@ -499,10 +483,9 @@ static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node * } #define MAX_WORK 10 -static struct rt_trie_node *resize(struct trie *t, struct tnode *tn) +static struct tnode *resize(struct trie *t, struct tnode *tn) { - struct rt_trie_node *n = NULL; - struct tnode *old_tn; + struct tnode *old_tn, *n = NULL; int inflate_threshold_use; int halve_threshold_use; int max_work; @@ -614,7 +597,7 @@ static struct rt_trie_node *resize(struct trie *t, struct tnode *tn) /* Return if at least one inflate is run */ if (max_work != MAX_WORK) - return (struct rt_trie_node *) tn; + return tn; /* * Halve as long as the number of empty children in this @@ -650,13 +633,13 @@ no_children: tnode_free_safe(tn); return n; } - return (struct rt_trie_node *) tn; + return tn; } static void tnode_clean_free(struct tnode *tn) { - struct rt_trie_node *tofree; + struct tnode *tofree; int i; for (i = 0; i < tnode_child_length(tn); i++) { @@ -667,10 +650,10 @@ static void tnode_clean_free(struct tnode *tn) node_free(tn); } -static struct tnode *inflate(struct trie *t, struct tnode *tn) +static struct tnode *inflate(struct trie *t, struct tnode *oldtnode) { - struct tnode *oldtnode = tn; - int olen = tnode_child_length(tn); + int olen = tnode_child_length(oldtnode); + struct tnode *tn; int i; pr_debug("In inflate\n"); @@ -690,11 +673,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn) for (i = 0; i < olen; i++) { struct tnode *inode; - inode = (struct tnode *) tnode_get_child(oldtnode, i); - if (inode && - IS_TNODE(inode) && - inode->pos == oldtnode->pos + oldtnode->bits && - inode->bits > 1) { + inode = tnode_get_child(oldtnode, i); + if (tnode_full(oldtnode, inode) && inode->bits > 1) { struct tnode *left, *right; t_key m = ~0U << (KEYLENGTH - 1) >> inode->pos; @@ -711,33 +691,29 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn) goto nomem; } - put_child(tn, 2*i, (struct rt_trie_node *) left); - put_child(tn, 2*i+1, (struct rt_trie_node *) right); + put_child(tn, 2*i, left); + put_child(tn, 2*i+1, right); } } for (i = 0; i < olen; i++) { - struct tnode *inode; - struct rt_trie_node *node = tnode_get_child(oldtnode, i); + struct tnode *inode = tnode_get_child(oldtnode, i); struct tnode *left, *right; int size, j; /* An empty child */ - if (node == NULL) + if (inode == NULL) continue; /* A leaf or an internal node with skipped bits */ - - if (IS_LEAF(node) || (node->pos > (tn->pos + tn->bits - 1))) { + if (!tnode_full(oldtnode, inode)) { put_child(tn, - tkey_extract_bits(node->key, oldtnode->pos, oldtnode->bits + 1), - node); + tkey_extract_bits(inode->key, tn->pos, tn->bits), + inode); continue; } /* An internal node with two children */ - inode = (struct tnode *) node; - if (inode->bits == 1) { put_child(tn, 2*i, rtnl_dereference(inode->child[0])); put_child(tn, 2*i+1, rtnl_dereference(inode->child[1])); @@ -769,12 +745,12 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn) * bit to zero. */ - left = (struct tnode *) tnode_get_child(tn, 2*i); + left = tnode_get_child(tn, 2*i); put_child(tn, 2*i, NULL); BUG_ON(!left); - right = (struct tnode *) tnode_get_child(tn, 2*i+1); + right = tnode_get_child(tn, 2*i+1); put_child(tn, 2*i+1, NULL); BUG_ON(!right); @@ -796,12 +772,11 @@ nomem: return ERR_PTR(-ENOMEM); } -static struct tnode *halve(struct trie *t, struct tnode *tn) +static struct tnode *halve(struct trie *t, struct tnode *oldtnode) { - struct tnode *oldtnode = tn; - struct rt_trie_node *left, *right; + int olen = tnode_child_length(oldtnode); + struct tnode *tn, *left, *right; int i; - int olen = tnode_child_length(tn); pr_debug("In halve\n"); @@ -830,7 +805,7 @@ static struct tnode *halve(struct trie *t, struct tnode *tn) if (!newn) goto nomem; - put_child(tn, i/2, (struct rt_trie_node *)newn); + put_child(tn, i/2, newn); } } @@ -855,7 +830,7 @@ static struct tnode *halve(struct trie *t, struct tnode *tn) } /* Two nonempty children */ - newBinNode = (struct tnode *) tnode_get_child(tn, i/2); + newBinNode = tnode_get_child(tn, i/2); put_child(tn, i/2, NULL); put_child(newBinNode, 0, left); put_child(newBinNode, 1, right); @@ -871,7 +846,7 @@ nomem: /* readside must use rcu_read_lock currently dump routines via get_fa_head and dump */ -static struct leaf_info *find_leaf_info(struct leaf *l, int plen) +static struct leaf_info *find_leaf_info(struct tnode *l, int plen) { struct hlist_head *head = &l->list; struct leaf_info *li; @@ -883,7 +858,7 @@ static struct leaf_info *find_leaf_info(struct leaf *l, int plen) return NULL; } -static inline struct list_head *get_fa_head(struct leaf *l, int plen) +static inline struct list_head *get_fa_head(struct tnode *l, int plen) { struct leaf_info *li = find_leaf_info(l, plen); @@ -915,32 +890,25 @@ static void insert_leaf_info(struct hlist_head *head, struct leaf_info *new) /* rcu_read_lock needs to be hold by caller from readside */ -static struct leaf * -fib_find_node(struct trie *t, u32 key) +static struct tnode *fib_find_node(struct trie *t, u32 key) { - int pos; - struct tnode *tn; - struct rt_trie_node *n; - - pos = 0; - n = rcu_dereference_rtnl(t->trie); + struct tnode *n = rcu_dereference_rtnl(t->trie); + int pos = 0; while (n && IS_TNODE(n)) { - tn = (struct tnode *) n; - - if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) { - pos = tn->pos + tn->bits; - n = tnode_get_child_rcu(tn, + if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) { + pos = n->pos + n->bits; + n = tnode_get_child_rcu(n, tkey_extract_bits(key, - tn->pos, - tn->bits)); + n->pos, + n->bits)); } else break; } /* Case we have found a leaf. Compare prefixes */ if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) - return (struct leaf *)n; + return n; return NULL; } @@ -956,14 +924,13 @@ static void trie_rebalance(struct trie *t, struct tnode *tn) while (tn != NULL && (tp = node_parent(tn)) != NULL) { cindex = tkey_extract_bits(key, tp->pos, tp->bits); wasfull = tnode_full(tp, tnode_get_child(tp, cindex)); - tn = (struct tnode *)resize(t, tn); + tn = resize(t, tn); - tnode_put_child_reorg(tp, cindex, - (struct rt_trie_node *)tn, wasfull); + tnode_put_child_reorg(tp, cindex, tn, wasfull); tp = node_parent(tn); if (!tp) - rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn); + rcu_assign_pointer(t->trie, tn); tnode_free_flush(); if (!tp) @@ -973,9 +940,9 @@ static void trie_rebalance(struct trie *t, struct tnode *tn) /* Handle last (top) tnode */ if (IS_TNODE(tn)) - tn = (struct tnode *)resize(t, tn); + tn = resize(t, tn); - rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn); + rcu_assign_pointer(t->trie, tn); tnode_free_flush(); } @@ -985,8 +952,8 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) { int pos, newpos; struct tnode *tp = NULL, *tn = NULL; - struct rt_trie_node *n; - struct leaf *l; + struct tnode *n; + struct tnode *l; int missbit; struct list_head *fa_head = NULL; struct leaf_info *li; @@ -1014,17 +981,15 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) */ while (n && IS_TNODE(n)) { - tn = (struct tnode *) n; - - if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) { - tp = tn; - pos = tn->pos + tn->bits; - n = tnode_get_child(tn, + if (tkey_sub_equals(n->key, pos, n->pos-pos, key)) { + tp = n; + pos = n->pos + n->bits; + n = tnode_get_child(n, tkey_extract_bits(key, - tn->pos, - tn->bits)); + n->pos, + n->bits)); - BUG_ON(n && node_parent(n) != tn); + BUG_ON(n && node_parent(n) != tp); } else break; } @@ -1040,14 +1005,13 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) /* Case 1: n is a leaf. Compare prefixes */ if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) { - l = (struct leaf *) n; li = leaf_info_new(plen); if (!li) return NULL; fa_head = &li->falh; - insert_leaf_info(&l->list, li); + insert_leaf_info(&n->list, li); goto done; } l = leaf_new(key); @@ -1068,10 +1032,10 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) if (t->trie && n == NULL) { /* Case 2: n is NULL, and will just insert a new leaf */ - node_set_parent((struct rt_trie_node *)l, tp); + node_set_parent(l, tp); cindex = tkey_extract_bits(key, tp->pos, tp->bits); - put_child(tp, cindex, (struct rt_trie_node *)l); + put_child(tp, cindex, l); } else { /* Case 3: n is a LEAF or a TNODE and the key doesn't match. */ /* @@ -1094,17 +1058,17 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen) return NULL; } - node_set_parent((struct rt_trie_node *)tn, tp); + node_set_parent(tn, tp); missbit = tkey_extract_bits(key, newpos, 1); - put_child(tn, missbit, (struct rt_trie_node *)l); + put_child(tn, missbit, l); put_child(tn, 1-missbit, n); if (tp) { cindex = tkey_extract_bits(key, tp->pos, tp->bits); - put_child(tp, cindex, (struct rt_trie_node *)tn); + put_child(tp, cindex, tn); } else { - rcu_assign_pointer(t->trie, (struct rt_trie_node *)tn); + rcu_assign_pointer(t->trie, tn); } tp = tn; @@ -1134,7 +1098,7 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg) u8 tos = cfg->fc_tos; u32 key, mask; int err; - struct leaf *l; + struct tnode *l; if (plen > 32) return -EINVAL; @@ -1292,7 +1256,7 @@ err: } /* should be called with rcu_read_lock */ -static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l, +static int check_leaf(struct fib_table *tb, struct trie *t, struct tnode *l, t_key key, const struct flowi4 *flp, struct fib_result *res, int fib_flags) { @@ -1365,7 +1329,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, struct trie_use_stats __percpu *stats = t->stats; #endif int ret; - struct rt_trie_node *n; + struct tnode *n; struct tnode *pn; unsigned int pos, bits; t_key key = ntohl(flp->daddr); @@ -1387,11 +1351,11 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, /* Just a leaf? */ if (IS_LEAF(n)) { - ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags); + ret = check_leaf(tb, t, n, key, flp, res, fib_flags); goto found; } - pn = (struct tnode *) n; + pn = n; chopped_off = 0; while (pn) { @@ -1412,13 +1376,13 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, } if (IS_LEAF(n)) { - ret = check_leaf(tb, t, (struct leaf *)n, key, flp, res, fib_flags); + ret = check_leaf(tb, t, n, key, flp, res, fib_flags); if (ret > 0) goto backtrace; goto found; } - cn = (struct tnode *)n; + cn = n; /* * It's a tnode, and we can do some extra checks here if we @@ -1506,7 +1470,7 @@ int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, current_prefix_length = mp; } - pn = (struct tnode *)n; /* Descend */ + pn = n; /* Descend */ chopped_off = 0; continue; @@ -1557,7 +1521,7 @@ EXPORT_SYMBOL_GPL(fib_table_lookup); /* * Remove the leaf and return parent. */ -static void trie_leaf_remove(struct trie *t, struct leaf *l) +static void trie_leaf_remove(struct trie *t, struct tnode *l) { struct tnode *tp = node_parent(l); @@ -1584,7 +1548,7 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg) u8 tos = cfg->fc_tos; struct fib_alias *fa, *fa_to_delete; struct list_head *fa_head; - struct leaf *l; + struct tnode *l; struct leaf_info *li; if (plen > 32) @@ -1682,7 +1646,7 @@ static int trie_flush_list(struct list_head *head) return found; } -static int trie_flush_leaf(struct leaf *l) +static int trie_flush_leaf(struct tnode *l) { int found = 0; struct hlist_head *lih = &l->list; @@ -1704,7 +1668,7 @@ static int trie_flush_leaf(struct leaf *l) * Scan for the next right leaf starting at node p->child[idx] * Since we have back pointer, no recursion necessary. */ -static struct leaf *leaf_walk_rcu(struct tnode *p, struct rt_trie_node *c) +static struct tnode *leaf_walk_rcu(struct tnode *p, struct tnode *c) { do { t_key idx; @@ -1720,47 +1684,46 @@ static struct leaf *leaf_walk_rcu(struct tnode *p, struct rt_trie_node *c) continue; if (IS_LEAF(c)) - return (struct leaf *) c; + return c; /* Rescan start scanning in new node */ - p = (struct tnode *) c; + p = c; idx = 0; } /* Node empty, walk back up to parent */ - c = (struct rt_trie_node *) p; + c = p; } while ((p = node_parent_rcu(c)) != NULL); return NULL; /* Root of trie */ } -static struct leaf *trie_firstleaf(struct trie *t) +static struct tnode *trie_firstleaf(struct trie *t) { - struct tnode *n = (struct tnode *)rcu_dereference_rtnl(t->trie); + struct tnode *n = rcu_dereference_rtnl(t->trie); if (!n) return NULL; if (IS_LEAF(n)) /* trie is just a leaf */ - return (struct leaf *) n; + return n; return leaf_walk_rcu(n, NULL); } -static struct leaf *trie_nextleaf(struct leaf *l) +static struct tnode *trie_nextleaf(struct tnode *l) { - struct rt_trie_node *c = (struct rt_trie_node *) l; - struct tnode *p = node_parent_rcu(c); + struct tnode *p = node_parent_rcu(l); if (!p) return NULL; /* trie with just one leaf */ - return leaf_walk_rcu(p, c); + return leaf_walk_rcu(p, l); } -static struct leaf *trie_leafindex(struct trie *t, int index) +static struct tnode *trie_leafindex(struct trie *t, int index) { - struct leaf *l = trie_firstleaf(t); + struct tnode *l = trie_firstleaf(t); while (l && index-- > 0) l = trie_nextleaf(l); @@ -1775,7 +1738,7 @@ static struct leaf *trie_leafindex(struct trie *t, int index) int fib_table_flush(struct fib_table *tb) { struct trie *t = (struct trie *) tb->tb_data; - struct leaf *l, *ll = NULL; + struct tnode *l, *ll = NULL; int found = 0; for (l = trie_firstleaf(t); l; l = trie_nextleaf(l)) { @@ -1840,7 +1803,7 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, return skb->len; } -static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb, +static int fn_trie_dump_leaf(struct tnode *l, struct fib_table *tb, struct sk_buff *skb, struct netlink_callback *cb) { struct leaf_info *li; @@ -1876,7 +1839,7 @@ static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb, int fib_table_dump(struct fib_table *tb, struct sk_buff *skb, struct netlink_callback *cb) { - struct leaf *l; + struct tnode *l; struct trie *t = (struct trie *) tb->tb_data; t_key key = cb->args[2]; int count = cb->args[3]; @@ -1922,7 +1885,7 @@ void __init fib_trie_init(void) 0, SLAB_PANIC, NULL); trie_leaf_kmem = kmem_cache_create("ip_fib_trie", - max(sizeof(struct leaf), + max(sizeof(struct tnode), sizeof(struct leaf_info)), 0, SLAB_PANIC, NULL); } @@ -1965,7 +1928,7 @@ struct fib_trie_iter { unsigned int depth; }; -static struct rt_trie_node *fib_trie_get_next(struct fib_trie_iter *iter) +static struct tnode *fib_trie_get_next(struct fib_trie_iter *iter) { struct tnode *tn = iter->tnode; unsigned int cindex = iter->index; @@ -1979,7 +1942,7 @@ static struct rt_trie_node *fib_trie_get_next(struct fib_trie_iter *iter) iter->tnode, iter->index, iter->depth); rescan: while (cindex < (1<<tn->bits)) { - struct rt_trie_node *n = tnode_get_child_rcu(tn, cindex); + struct tnode *n = tnode_get_child_rcu(tn, cindex); if (n) { if (IS_LEAF(n)) { @@ -1987,7 +1950,7 @@ rescan: iter->index = cindex + 1; } else { /* push down one level */ - iter->tnode = (struct tnode *) n; + iter->tnode = n; iter->index = 0; ++iter->depth; } @@ -1998,7 +1961,7 @@ rescan: } /* Current node exhausted, pop back up */ - p = node_parent_rcu((struct rt_trie_node *)tn); + p = node_parent_rcu(tn); if (p) { cindex = tkey_extract_bits(tn->key, p->pos, p->bits)+1; tn = p; @@ -2010,10 +1973,10 @@ rescan: return NULL; } -static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter, +static struct tnode *fib_trie_get_first(struct fib_trie_iter *iter, struct trie *t) { - struct rt_trie_node *n; + struct tnode *n; if (!t) return NULL; @@ -2023,7 +1986,7 @@ static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter, return NULL; if (IS_TNODE(n)) { - iter->tnode = (struct tnode *) n; + iter->tnode = n; iter->index = 0; iter->depth = 1; } else { @@ -2037,7 +2000,7 @@ static struct rt_trie_node *fib_trie_get_first(struct fib_trie_iter *iter, static void trie_collect_stats(struct trie *t, struct trie_stat *s) { - struct rt_trie_node *n; + struct tnode *n; struct fib_trie_iter iter; memset(s, 0, sizeof(*s)); @@ -2045,7 +2008,6 @@ static void trie_collect_stats(struct trie *t, struct trie_stat *s) rcu_read_lock(); for (n = fib_trie_get_first(&iter, t); n; n = fib_trie_get_next(&iter)) { if (IS_LEAF(n)) { - struct leaf *l = (struct leaf *)n; struct leaf_info *li; s->leaves++; @@ -2053,18 +2015,17 @@ static void trie_collect_stats(struct trie *t, struct trie_stat *s) if (iter.depth > s->maxdepth) s->maxdepth = iter.depth; - hlist_for_each_entry_rcu(li, &l->list, hlist) + hlist_for_each_entry_rcu(li, &n->list, hlist) ++s->prefixes; } else { - const struct tnode *tn = (const struct tnode *) n; int i; s->tnodes++; - if (tn->bits < MAX_STAT_DEPTH) - s->nodesizes[tn->bits]++; + if (n->bits < MAX_STAT_DEPTH) + s->nodesizes[n->bits]++; - for (i = 0; i < (1<<tn->bits); i++) - if (!tn->child[i]) + for (i = 0; i < tnode_child_length(n); i++) + if (!rcu_access_pointer(n->child[i])) s->nullpointers++; } } @@ -2088,7 +2049,7 @@ static void trie_show_stats(struct seq_file *seq, struct trie_stat *stat) seq_printf(seq, "\tMax depth: %u\n", stat->maxdepth); seq_printf(seq, "\tLeaves: %u\n", stat->leaves); - bytes = sizeof(struct leaf) * stat->leaves; + bytes = sizeof(struct tnode) * stat->leaves; seq_printf(seq, "\tPrefixes: %u\n", stat->prefixes); bytes += sizeof(struct leaf_info) * stat->prefixes; @@ -2109,7 +2070,7 @@ static void trie_show_stats(struct seq_file *seq, struct trie_stat *stat) seq_putc(seq, '\n'); seq_printf(seq, "\tPointers: %u\n", pointers); - bytes += sizeof(struct rt_trie_node *) * pointers; + bytes += sizeof(struct tnode *) * pointers; seq_printf(seq, "Null ptrs: %u\n", stat->nullpointers); seq_printf(seq, "Total size: %u kB\n", (bytes + 1023) / 1024); } @@ -2163,7 +2124,7 @@ static int fib_triestat_seq_show(struct seq_file *seq, void *v) seq_printf(seq, "Basic info: size of leaf:" " %Zd bytes, size of tnode: %Zd bytes.\n", - sizeof(struct leaf), sizeof(struct tnode)); + sizeof(struct tnode), sizeof(struct tnode)); for (h = 0; h < FIB_TABLE_HASHSZ; h++) { struct hlist_head *head = &net->ipv4.fib_table_hash[h]; @@ -2202,7 +2163,7 @@ static const struct file_operations fib_triestat_fops = { .release = single_release_net, }; -static struct rt_trie_node *fib_trie_get_idx(struct seq_file *seq, loff_t pos) +static struct tnode *fib_trie_get_idx(struct seq_file *seq, loff_t pos) { struct fib_trie_iter *iter = seq->private; struct net *net = seq_file_net(seq); @@ -2214,7 +2175,7 @@ static struct rt_trie_node *fib_trie_get_idx(struct seq_file *seq, loff_t pos) struct fib_table *tb; hlist_for_each_entry_rcu(tb, head, tb_hlist) { - struct rt_trie_node *n; + struct tnode *n; for (n = fib_trie_get_first(iter, (struct trie *) tb->tb_data); @@ -2243,7 +2204,7 @@ static void *fib_trie_seq_next(struct seq_file *seq, void *v, loff_t *pos) struct fib_table *tb = iter->tb; struct hlist_node *tb_node; unsigned int h; - struct rt_trie_node *n; + struct tnode *n; ++*pos; /* next node in same table */ @@ -2329,29 +2290,26 @@ static inline const char *rtn_type(char *buf, size_t len, unsigned int t) static int fib_trie_seq_show(struct seq_file *seq, void *v) { const struct fib_trie_iter *iter = seq->private; - struct rt_trie_node *n = v; + struct tnode *n = v; if (!node_parent_rcu(n)) fib_table_print(seq, iter->tb); if (IS_TNODE(n)) { - struct tnode *tn = (struct tnode *) n; - __be32 prf = htonl(tn->key); + __be32 prf = htonl(n->key); - seq_indent(seq, iter->depth-1); + seq_indent(seq, iter->depth - 1); seq_printf(seq, " +-- %pI4/%d %d %d %d\n", - &prf, tn->pos, tn->bits, tn->full_children, - tn->empty_children); - + &prf, n->pos, n->bits, n->full_children, + n->empty_children); } else { - struct leaf *l = (struct leaf *) n; struct leaf_info *li; - __be32 val = htonl(l->key); + __be32 val = htonl(n->key); seq_indent(seq, iter->depth); seq_printf(seq, " |-- %pI4\n", &val); - hlist_for_each_entry_rcu(li, &l->list, hlist) { + hlist_for_each_entry_rcu(li, &n->list, hlist) { struct fib_alias *fa; list_for_each_entry_rcu(fa, &li->falh, fa_list) { @@ -2401,9 +2359,9 @@ struct fib_route_iter { t_key key; }; -static struct leaf *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos) +static struct tnode *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos) { - struct leaf *l = NULL; + struct tnode *l = NULL; struct trie *t = iter->main_trie; /* use cache location of last found key */ @@ -2448,7 +2406,7 @@ static void *fib_route_seq_start(struct seq_file *seq, loff_t *pos) static void *fib_route_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct fib_route_iter *iter = seq->private; - struct leaf *l = v; + struct tnode *l = v; ++*pos; if (v == SEQ_START_TOKEN) { @@ -2494,7 +2452,7 @@ static unsigned int fib_flag_trans(int type, __be32 mask, const struct fib_info */ static int fib_route_seq_show(struct seq_file *seq, void *v) { - struct leaf *l = v; + struct tnode *l = v; struct leaf_info *li; if (v == SEQ_START_TOKEN) { |