* Robert Olsson <robert.olsson@its.uu.se> Uppsala Universitet
* & Swedish University of Agricultural Sciences.
*
- * Jens Laas <jens.laas@data.slu.se> Swedish University of
+ * Jens Laas <jens.laas@data.slu.se> Swedish University of
* Agricultural Sciences.
- *
+ *
* Hans Liss <hans.liss@its.uu.se> Uppsala Universitet
*
* This work is based on the LPC-trie which is originally descibed in:
- *
+ *
* An experimental study of compression methods for dynamic tries
* Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002.
* http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/
* IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson
* IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999
*
- * Version: $Id: fib_trie.c,v 1.3 2005/06/08 14:20:01 robert Exp $
- *
*
* Code from fib_hash has been reused which includes the following header:
*
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
+ *
+ * Substantial contributions to this work comes from:
+ *
+ * David S. Miller, <davem@davemloft.net>
+ * Stephen Hemminger <shemminger@osdl.org>
+ * Paul E. McKenney <paulmck@us.ibm.com>
+ * Patrick McHardy <kaber@trash.net>
*/
-#define VERSION "0.325"
+#define VERSION "0.408"
-#include <linux/config.h>
#include <asm/uaccess.h>
#include <asm/system.h>
-#include <asm/bitops.h>
+#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/inet.h>
+#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/proc_fs.h>
+#include <linux/rcupdate.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/init.h>
#include <linux/list.h>
+#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <net/route.h>
#include <net/ip_fib.h>
#include "fib_lookup.h"
-#undef CONFIG_IP_FIB_TRIE_STATS
-#define MAX_CHILDS 16384
+#define MAX_STAT_DEPTH 32
#define KEYLENGTH (8*sizeof(t_key))
-#define MASK_PFX(k, l) (((l)==0)?0:(k >> (KEYLENGTH-l)) << (KEYLENGTH-l))
-#define TKEY_GET_MASK(offset, bits) (((bits)==0)?0:((t_key)(-1) << (KEYLENGTH - bits) >> offset))
-
-static DEFINE_RWLOCK(fib_lock);
typedef unsigned int t_key;
#define T_TNODE 0
#define T_LEAF 1
#define NODE_TYPE_MASK 0x1UL
-#define NODE_PARENT(node) \
- ((struct tnode *)((node)->parent & ~NODE_TYPE_MASK))
-#define NODE_SET_PARENT(node, ptr) \
- ((node)->parent = (((unsigned long)(ptr)) | \
- ((node)->parent & NODE_TYPE_MASK)))
-#define NODE_INIT_PARENT(node, type) \
- ((node)->parent = (type))
-#define NODE_TYPE(node) \
- ((node)->parent & NODE_TYPE_MASK)
+#define NODE_TYPE(node) ((node)->parent & NODE_TYPE_MASK)
#define IS_TNODE(n) (!(n->parent & T_LEAF))
#define IS_LEAF(n) (n->parent & T_LEAF)
struct node {
- t_key key;
unsigned long parent;
+ t_key key;
};
struct leaf {
- t_key key;
unsigned long parent;
+ t_key key;
struct hlist_head list;
+ struct rcu_head rcu;
};
struct leaf_info {
struct hlist_node hlist;
+ struct rcu_head rcu;
int plen;
struct list_head falh;
};
struct tnode {
- t_key key;
unsigned long parent;
- unsigned short pos:5; /* 2log(KEYLENGTH) bits needed */
- unsigned short bits:5; /* 2log(KEYLENGTH) bits needed */
- unsigned short full_children; /* KEYLENGTH bits needed */
- unsigned short empty_children; /* KEYLENGTH bits needed */
+ t_key key;
+ unsigned char pos; /* 2log(KEYLENGTH) bits needed */
+ unsigned char bits; /* 2log(KEYLENGTH) bits needed */
+ unsigned int full_children; /* KEYLENGTH bits needed */
+ unsigned int empty_children; /* KEYLENGTH bits needed */
+ union {
+ struct rcu_head rcu;
+ struct work_struct work;
+ };
struct node *child[0];
};
unsigned int tnodes;
unsigned int leaves;
unsigned int nullpointers;
- unsigned int nodesizes[MAX_CHILDS];
+ unsigned int prefixes;
+ unsigned int nodesizes[MAX_STAT_DEPTH];
};
struct trie {
#ifdef CONFIG_IP_FIB_TRIE_STATS
struct trie_use_stats stats;
#endif
- int size;
- unsigned int revision;
};
-static int trie_debug = 0;
-
-#define DBG(x...) do { if (trie_debug) printk(x); } while (0)
-
static void put_child(struct trie *t, struct tnode *tn, int i, struct node *n);
-static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int wasfull);
+static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n,
+ int wasfull);
static struct node *resize(struct trie *t, struct tnode *tn);
static struct tnode *inflate(struct trie *t, struct tnode *tn);
static struct tnode *halve(struct trie *t, struct tnode *tn);
-static void tnode_free(struct tnode *tn);
-static void trie_dump_seq(struct seq_file *seq, struct trie *t);
-extern struct fib_alias *fib_find_alias(struct list_head *fah, u8 tos, u32 prio);
-extern int fib_detect_death(struct fib_info *fi, int order,
- struct fib_info **last_resort, int *last_idx, int *dflt);
-extern void rtmsg_fib(int event, u32 key, struct fib_alias *fa, int z, int tb_id,
- struct nlmsghdr *n, struct netlink_skb_parms *req);
+static struct kmem_cache *fn_alias_kmem __read_mostly;
+static struct kmem_cache *trie_leaf_kmem __read_mostly;
+
+static inline struct tnode *node_parent(struct node *node)
+{
+ return (struct tnode *)(node->parent & ~NODE_TYPE_MASK);
+}
+
+static inline struct tnode *node_parent_rcu(struct node *node)
+{
+ struct tnode *ret = node_parent(node);
+
+ return rcu_dereference(ret);
+}
-static kmem_cache_t *fn_alias_kmem;
-static struct trie *trie_local = NULL, *trie_main = NULL;
+/* Same as rcu_assign_pointer
+ * but that macro() assumes that value is a pointer.
+ */
+static inline void node_set_parent(struct node *node, struct tnode *ptr)
+{
+ smp_wmb();
+ node->parent = (unsigned long)ptr | NODE_TYPE(node);
+}
-static inline struct node *tnode_get_child(struct tnode *tn, int i)
+static inline struct node *tnode_get_child(struct tnode *tn, unsigned int i)
{
- BUG_ON(i >= 1 << tn->bits);
+ BUG_ON(i >= 1U << tn->bits);
return tn->child[i];
}
+static inline struct node *tnode_get_child_rcu(struct tnode *tn, unsigned int i)
+{
+ struct node *ret = tnode_get_child(tn, i);
+
+ return rcu_dereference(ret);
+}
+
static inline int tnode_child_length(const struct tnode *tn)
{
return 1 << tn->bits;
}
+static inline t_key mask_pfx(t_key k, unsigned short l)
+{
+ return (l == 0) ? 0 : k >> (KEYLENGTH-l) << (KEYLENGTH-l);
+}
+
static inline t_key tkey_extract_bits(t_key a, int offset, int bits)
{
if (offset < KEYLENGTH)
return i;
}
-/* Candidate for fib_semantics */
-
-static void fn_free_alias(struct fib_alias *fa)
-{
- fib_release_info(fa->fa_info);
- kmem_cache_free(fn_alias_kmem, fa);
-}
-
/*
- To understand this stuff, an understanding of keys and all their bits is
- necessary. Every node in the trie has a key associated with it, but not
+ To understand this stuff, an understanding of keys and all their bits is
+ necessary. Every node in the trie has a key associated with it, but not
all of the bits in that key are significant.
Consider a node 'n' and its parent 'tp'.
- If n is a leaf, every bit in its key is significant. Its presence is
- necessitaded by path compression, since during a tree traversal (when
- searching for a leaf - unless we are doing an insertion) we will completely
- ignore all skipped bits we encounter. Thus we need to verify, at the end of
- a potentially successful search, that we have indeed been walking the
+ If n is a leaf, every bit in its key is significant. Its presence is
+ necessitated by path compression, since during a tree traversal (when
+ searching for a leaf - unless we are doing an insertion) we will completely
+ ignore all skipped bits we encounter. Thus we need to verify, at the end of
+ a potentially successful search, that we have indeed been walking the
correct key path.
- Note that we can never "miss" the correct key in the tree if present by
- following the wrong path. Path compression ensures that segments of the key
- that are the same for all keys with a given prefix are skipped, but the
- skipped part *is* identical for each node in the subtrie below the skipped
- bit! trie_insert() in this implementation takes care of that - note the
+ Note that we can never "miss" the correct key in the tree if present by
+ following the wrong path. Path compression ensures that segments of the key
+ that are the same for all keys with a given prefix are skipped, but the
+ skipped part *is* identical for each node in the subtrie below the skipped
+ bit! trie_insert() in this implementation takes care of that - note the
call to tkey_sub_equals() in trie_insert().
- if n is an internal node - a 'tnode' here, the various parts of its key
+ if n is an internal node - a 'tnode' here, the various parts of its key
have many different meanings.
- Example:
+ Example:
_________________________________________________________________
| i | i | i | i | i | i | i | N | N | N | S | S | S | S | S | C |
-----------------------------------------------------------------
- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
_________________________________________________________________
| C | C | C | u | u | u | u | u | u | u | u | u | u | u | u | u |
n->pos = 15
n->bits = 4
- First, let's just ignore the bits that come before the parent tp, that is
- the bits from 0 to (tp->pos-1). They are *known* but at this point we do
+ First, let's just ignore the bits that come before the parent tp, that is
+ the bits from 0 to (tp->pos-1). They are *known* but at this point we do
not use them for anything.
The bits from (tp->pos) to (tp->pos + tp->bits - 1) - "N", above - are the
- index into the parent's child array. That is, they will be used to find
+ index into the parent's child array. That is, they will be used to find
'n' among tp's children.
The bits from (tp->pos + tp->bits) to (n->pos - 1) - "S" - are skipped bits
for the node n.
- All the bits we have seen so far are significant to the node n. The rest
+ All the bits we have seen so far are significant to the node n. The rest
of the bits are really not needed or indeed known in n->key.
- The bits from (n->pos) to (n->pos + n->bits - 1) - "C" - are the index into
+ The bits from (n->pos) to (n->pos + n->bits - 1) - "C" - are the index into
n's child array, and will of course be different for each child.
-
+
The rest of the bits, from (n->pos + n->bits) onward, are completely unknown
at this point.
*/
-static void check_tnode(struct tnode *tn)
+static inline void check_tnode(const struct tnode *tn)
{
- if (tn && tn->pos+tn->bits > 32) {
- printk("TNODE ERROR tn=%p, pos=%d, bits=%d\n", tn, tn->pos, tn->bits);
- }
+ WARN_ON(tn && tn->pos+tn->bits > 32);
}
-static int halve_threshold = 25;
-static int inflate_threshold = 50;
+static const int halve_threshold = 25;
+static const int inflate_threshold = 50;
+static const int halve_threshold_root = 8;
+static const int inflate_threshold_root = 15;
-static struct leaf *leaf_new(void)
+
+static void __alias_free_mem(struct rcu_head *head)
{
- struct leaf *l = kmalloc(sizeof(struct leaf), GFP_KERNEL);
- if (l) {
- NODE_INIT_PARENT(l, T_LEAF);
- INIT_HLIST_HEAD(&l->list);
- }
- return l;
+ struct fib_alias *fa = container_of(head, struct fib_alias, rcu);
+ kmem_cache_free(fn_alias_kmem, fa);
}
-static struct leaf_info *leaf_info_new(int plen)
+static inline void alias_free_mem_rcu(struct fib_alias *fa)
{
- struct leaf_info *li = kmalloc(sizeof(struct leaf_info), GFP_KERNEL);
+ call_rcu(&fa->rcu, __alias_free_mem);
+}
- if (!li)
- return NULL;
+static void __leaf_free_rcu(struct rcu_head *head)
+{
+ struct leaf *l = container_of(head, struct leaf, rcu);
+ kmem_cache_free(trie_leaf_kmem, l);
+}
- li->plen = plen;
- INIT_LIST_HEAD(&li->falh);
+static inline void free_leaf(struct leaf *l)
+{
+ call_rcu_bh(&l->rcu, __leaf_free_rcu);
+}
- return li;
+static void __leaf_info_free_rcu(struct rcu_head *head)
+{
+ kfree(container_of(head, struct leaf_info, rcu));
}
-static inline void free_leaf(struct leaf *l)
+static inline void free_leaf_info(struct leaf_info *leaf)
{
- kfree(l);
+ call_rcu(&leaf->rcu, __leaf_info_free_rcu);
}
-static inline void free_leaf_info(struct leaf_info *li)
+static struct tnode *tnode_alloc(size_t size)
{
- kfree(li);
+ if (size <= PAGE_SIZE)
+ return kzalloc(size, GFP_KERNEL);
+ else
+ return __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
}
-static struct tnode *tnode_alloc(unsigned int size)
+static void __tnode_vfree(struct work_struct *arg)
{
- if (size <= PAGE_SIZE) {
- return kmalloc(size, GFP_KERNEL);
- } else {
- return (struct tnode *)
- __get_free_pages(GFP_KERNEL, get_order(size));
- }
+ struct tnode *tn = container_of(arg, struct tnode, work);
+ vfree(tn);
}
-static void __tnode_free(struct tnode *tn)
+static void __tnode_free_rcu(struct rcu_head *head)
{
- unsigned int size = sizeof(struct tnode) +
- (1 << tn->bits) * sizeof(struct node *);
+ struct tnode *tn = container_of(head, struct tnode, rcu);
+ size_t size = sizeof(struct tnode) +
+ (sizeof(struct node *) << tn->bits);
if (size <= PAGE_SIZE)
kfree(tn);
+ else {
+ INIT_WORK(&tn->work, __tnode_vfree);
+ schedule_work(&tn->work);
+ }
+}
+
+static inline void tnode_free(struct tnode *tn)
+{
+ if (IS_LEAF(tn))
+ free_leaf((struct leaf *) tn);
else
- free_pages((unsigned long)tn, get_order(size));
+ call_rcu(&tn->rcu, __tnode_free_rcu);
+}
+
+static struct leaf *leaf_new(void)
+{
+ struct leaf *l = kmem_cache_alloc(trie_leaf_kmem, GFP_KERNEL);
+ if (l) {
+ l->parent = T_LEAF;
+ INIT_HLIST_HEAD(&l->list);
+ }
+ return l;
+}
+
+static struct leaf_info *leaf_info_new(int plen)
+{
+ struct leaf_info *li = kmalloc(sizeof(struct leaf_info), GFP_KERNEL);
+ if (li) {
+ li->plen = plen;
+ INIT_LIST_HEAD(&li->falh);
+ }
+ return li;
}
-static struct tnode* tnode_new(t_key key, int pos, int bits)
+static struct tnode *tnode_new(t_key key, int pos, int bits)
{
- int nchildren = 1<<bits;
- int sz = sizeof(struct tnode) + nchildren * sizeof(struct node *);
+ size_t sz = sizeof(struct tnode) + (sizeof(struct node *) << bits);
struct tnode *tn = tnode_alloc(sz);
if (tn) {
- memset(tn, 0, sz);
- NODE_INIT_PARENT(tn, T_TNODE);
+ tn->parent = T_TNODE;
tn->pos = pos;
tn->bits = bits;
tn->key = key;
tn->empty_children = 1<<bits;
}
- DBG("AT %p s=%u %u\n", tn, (unsigned int) sizeof(struct tnode),
- (unsigned int) (sizeof(struct node) * 1<<bits));
+ pr_debug("AT %p s=%u %lu\n", tn, (unsigned int) sizeof(struct tnode),
+ (unsigned long) (sizeof(struct node) << bits));
return tn;
}
-static void tnode_free(struct tnode *tn)
-{
- BUG_ON(!tn);
-
- if (IS_LEAF(tn)) {
- free_leaf((struct leaf *)tn);
- DBG("FL %p \n", tn);
- } else {
- __tnode_free(tn);
- DBG("FT %p \n", tn);
- }
-}
-
/*
* Check whether a tnode 'n' is "full", i.e. it is an internal node
* and no bits are skipped. See discussion in dyntree paper p. 6
return ((struct tnode *) n)->pos == tn->pos + tn->bits;
}
-static inline void put_child(struct trie *t, struct tnode *tn, int i, struct node *n)
+static inline void put_child(struct trie *t, struct tnode *tn, int i,
+ struct node *n)
{
tnode_put_child_reorg(tn, i, n, -1);
}
* Update the value of full_children and empty_children.
*/
-static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int wasfull)
+static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n,
+ int wasfull)
{
- struct node *chi;
+ struct node *chi = tn->child[i];
int isfull;
- if (i >= 1<<tn->bits) {
- printk("bits=%d, i=%d\n", tn->bits, i);
- BUG();
- }
- write_lock_bh(&fib_lock);
- chi = tn->child[i];
+ BUG_ON(i >= 1<<tn->bits);
/* update emptyChildren */
if (n == NULL && chi != NULL)
tn->full_children++;
if (n)
- NODE_SET_PARENT(n, tn);
+ node_set_parent(n, tn);
- tn->child[i] = n;
- write_unlock_bh(&fib_lock);
+ rcu_assign_pointer(tn->child[i], n);
}
static struct node *resize(struct trie *t, struct tnode *tn)
int i;
int err = 0;
struct tnode *old_tn;
+ int inflate_threshold_use;
+ int halve_threshold_use;
+ int max_resize;
- if (!tn)
+ if (!tn)
return NULL;
- DBG("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
- tn, inflate_threshold, halve_threshold);
+ pr_debug("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
+ tn, inflate_threshold, halve_threshold);
/* No children */
if (tn->empty_children == tnode_child_length(tn)) {
for (i = 0; i < tnode_child_length(tn); i++) {
struct node *n;
- write_lock_bh(&fib_lock);
n = tn->child[i];
- if (!n) {
- write_unlock_bh(&fib_lock);
+ if (!n)
continue;
- }
/* compress one level */
- NODE_INIT_PARENT(n, NODE_TYPE(n));
-
- write_unlock_bh(&fib_lock);
+ node_set_parent(n, NULL);
tnode_free(tn);
return n;
}
check_tnode(tn);
+ /* Keep root node larger */
+
+ if (!tn->parent)
+ inflate_threshold_use = inflate_threshold_root;
+ else
+ inflate_threshold_use = inflate_threshold;
+
err = 0;
- while ((tn->full_children > 0 &&
- 50 * (tn->full_children + tnode_child_length(tn) - tn->empty_children) >=
- inflate_threshold * tnode_child_length(tn))) {
+ max_resize = 10;
+ while ((tn->full_children > 0 && max_resize-- &&
+ 50 * (tn->full_children + tnode_child_length(tn)
+ - tn->empty_children)
+ >= inflate_threshold_use * tnode_child_length(tn))) {
old_tn = tn;
tn = inflate(t, tn);
+
if (IS_ERR(tn)) {
tn = old_tn;
#ifdef CONFIG_IP_FIB_TRIE_STATS
}
}
+ if (max_resize < 0) {
+ if (!tn->parent)
+ pr_warning("Fix inflate_threshold_root."
+ " Now=%d size=%d bits\n",
+ inflate_threshold_root, tn->bits);
+ else
+ pr_warning("Fix inflate_threshold."
+ " Now=%d size=%d bits\n",
+ inflate_threshold, tn->bits);
+ }
+
check_tnode(tn);
/*
* node is above threshold.
*/
+
+ /* Keep root node larger */
+
+ if (!tn->parent)
+ halve_threshold_use = halve_threshold_root;
+ else
+ halve_threshold_use = halve_threshold;
+
err = 0;
- while (tn->bits > 1 &&
+ max_resize = 10;
+ while (tn->bits > 1 && max_resize-- &&
100 * (tnode_child_length(tn) - tn->empty_children) <
- halve_threshold * tnode_child_length(tn)) {
+ halve_threshold_use * tnode_child_length(tn)) {
old_tn = tn;
tn = halve(t, tn);
}
}
+ if (max_resize < 0) {
+ if (!tn->parent)
+ pr_warning("Fix halve_threshold_root."
+ " Now=%d size=%d bits\n",
+ halve_threshold_root, tn->bits);
+ else
+ pr_warning("Fix halve_threshold."
+ " Now=%d size=%d bits\n",
+ halve_threshold, tn->bits);
+ }
/* Only one child remains */
-
if (tn->empty_children == tnode_child_length(tn) - 1)
for (i = 0; i < tnode_child_length(tn); i++) {
struct node *n;
- write_lock_bh(&fib_lock);
-
n = tn->child[i];
- if (!n) {
- write_unlock_bh(&fib_lock);
+ if (!n)
continue;
- }
/* compress one level */
- NODE_INIT_PARENT(n, NODE_TYPE(n));
-
- write_unlock_bh(&fib_lock);
+ node_set_parent(n, NULL);
tnode_free(tn);
return n;
}
static struct tnode *inflate(struct trie *t, struct tnode *tn)
{
- struct tnode *inode;
struct tnode *oldtnode = tn;
int olen = tnode_child_length(tn);
int i;
- DBG("In inflate\n");
+ pr_debug("In inflate\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits + 1);
- if (!tn)
+ if (!tn)
return ERR_PTR(-ENOMEM);
/*
*/
for (i = 0; i < olen; i++) {
- struct tnode *inode = (struct tnode *) tnode_get_child(oldtnode, 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) {
struct tnode *left, *right;
- t_key m = TKEY_GET_MASK(inode->pos, 1);
+ t_key m = ~0U << (KEYLENGTH - 1) >> inode->pos;
left = tnode_new(inode->key&(~m), inode->pos + 1,
inode->bits - 1);
right = tnode_new(inode->key|m, inode->pos + 1,
inode->bits - 1);
- if (!right) {
+ if (!right) {
tnode_free(left);
goto nomem;
- }
+ }
put_child(t, tn, 2*i, (struct node *) left);
put_child(t, tn, 2*i+1, (struct node *) right);
}
for (i = 0; i < olen; i++) {
+ struct tnode *inode;
struct node *node = tnode_get_child(oldtnode, i);
struct tnode *left, *right;
int size, j;
if (IS_LEAF(node) || ((struct tnode *) node)->pos >
tn->pos + tn->bits - 1) {
- if (tkey_extract_bits(node->key, oldtnode->pos + oldtnode->bits,
- 1) == 0)
+ if (tkey_extract_bits(node->key,
+ oldtnode->pos + oldtnode->bits,
+ 1) == 0)
put_child(t, tn, 2*i, node);
else
put_child(t, tn, 2*i+1, node);
int size = tnode_child_length(tn);
int j;
- for(j = 0; j < size; j++)
+ for (j = 0; j < size; j++)
if (tn->child[j])
tnode_free((struct tnode *)tn->child[j]);
tnode_free(tn);
-
+
return ERR_PTR(-ENOMEM);
}
}
int i;
int olen = tnode_child_length(tn);
- DBG("In halve\n");
+ pr_debug("In halve\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits - 1);
right = tnode_get_child(oldtnode, i+1);
/* Two nonempty children */
- if (left && right) {
+ if (left && right) {
struct tnode *newn;
-
+
newn = tnode_new(left->key, tn->pos + tn->bits, 1);
-
- if (!newn)
+
+ if (!newn)
goto nomem;
-
+
put_child(t, tn, i/2, (struct node *)newn);
}
continue;
put_child(t, tn, i/2, right);
continue;
- }
+ }
if (right == NULL) {
put_child(t, tn, i/2, left);
/* Two nonempty children */
newBinNode = (struct tnode *) tnode_get_child(tn, i/2);
put_child(t, tn, i/2, NULL);
-
- BUG_ON(!newBinNode);
-
put_child(t, newBinNode, 0, left);
put_child(t, newBinNode, 1, right);
put_child(t, tn, i/2, resize(t, newBinNode));
int size = tnode_child_length(tn);
int j;
- for(j = 0; j < size; j++)
+ for (j = 0; j < size; j++)
if (tn->child[j])
tnode_free((struct tnode *)tn->child[j]);
tnode_free(tn);
-
+
return ERR_PTR(-ENOMEM);
}
}
-static void trie_init(struct trie *t)
-{
- if (!t)
- return;
-
- t->size = 0;
- t->trie = NULL;
- t->revision = 0;
-#ifdef CONFIG_IP_FIB_TRIE_STATS
- memset(&t->stats, 0, sizeof(struct trie_use_stats));
-#endif
-}
+/* readside must use rcu_read_lock currently dump routines
+ via get_fa_head and dump */
-static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
+static struct leaf_info *find_leaf_info(struct leaf *l, int plen)
{
+ struct hlist_head *head = &l->list;
struct hlist_node *node;
struct leaf_info *li;
- hlist_for_each_entry(li, node, head, hlist)
+ hlist_for_each_entry_rcu(li, node, head, hlist)
if (li->plen == plen)
return li;
return NULL;
}
-static inline struct list_head * get_fa_head(struct leaf *l, int plen)
+static inline struct list_head *get_fa_head(struct leaf *l, int plen)
{
- struct leaf_info *li = find_leaf_info(&l->list, plen);
+ struct leaf_info *li = find_leaf_info(l, plen);
if (!li)
return NULL;
struct leaf_info *li = NULL, *last = NULL;
struct hlist_node *node;
- write_lock_bh(&fib_lock);
-
if (hlist_empty(head)) {
- hlist_add_head(&new->hlist, head);
+ hlist_add_head_rcu(&new->hlist, head);
} else {
hlist_for_each_entry(li, node, head, hlist) {
if (new->plen > li->plen)
last = li;
}
if (last)
- hlist_add_after(&last->hlist, &new->hlist);
+ hlist_add_after_rcu(&last->hlist, &new->hlist);
else
- hlist_add_before(&new->hlist, &li->hlist);
+ hlist_add_before_rcu(&new->hlist, &li->hlist);
}
- write_unlock_bh(&fib_lock);
}
+/* rcu_read_lock needs to be hold by caller from readside */
+
static struct leaf *
fib_find_node(struct trie *t, u32 key)
{
struct node *n;
pos = 0;
- n = t->trie;
+ n = rcu_dereference(t->trie);
while (n != NULL && NODE_TYPE(n) == T_TNODE) {
tn = (struct tnode *) n;
if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
pos = tn->pos + tn->bits;
- n = tnode_get_child(tn, tkey_extract_bits(key, tn->pos, tn->bits));
+ n = tnode_get_child_rcu(tn,
+ tkey_extract_bits(key,
+ tn->pos,
+ tn->bits));
} else
break;
}
static struct node *trie_rebalance(struct trie *t, struct tnode *tn)
{
- int i;
int wasfull;
- t_key cindex, key;
- struct tnode *tp = NULL;
-
- BUG_ON(!tn);
-
- key = tn->key;
- i = 0;
-
- while (tn != NULL && NODE_PARENT(tn) != NULL) {
- if (i > 10) {
- printk("Rebalance tn=%p \n", tn);
- if (tn)
- printk("tn->parent=%p \n", NODE_PARENT(tn));
-
- printk("Rebalance tp=%p \n", tp);
- if (tp)
- printk("tp->parent=%p \n", NODE_PARENT(tp));
- }
-
- BUG_ON(i > 12); /* Why is this a bug? -ojn */
- i++;
+ t_key cindex, key = tn->key;
+ struct tnode *tp;
- tp = NODE_PARENT(tn);
+ while (tn != NULL && (tp = node_parent((struct node *)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, (struct tnode *)tn);
- tnode_put_child_reorg((struct tnode *)tp, cindex,(struct node*)tn, wasfull);
+ tn = (struct tnode *) resize(t, (struct tnode *)tn);
- if (!NODE_PARENT(tn))
- break;
+ tnode_put_child_reorg((struct tnode *)tp, cindex,
+ (struct node *)tn, wasfull);
- tn = NODE_PARENT(tn);
+ tp = node_parent((struct node *) tn);
+ if (!tp)
+ break;
+ tn = tp;
}
+
/* Handle last (top) tnode */
if (IS_TNODE(tn))
- tn = (struct tnode*) resize(t, (struct tnode *)tn);
+ tn = (struct tnode *)resize(t, (struct tnode *)tn);
- return (struct node*) tn;
+ return (struct node *)tn;
}
-static struct list_head *
-fib_insert_node(struct trie *t, int *err, u32 key, int plen)
+/* only used from updater-side */
+
+static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
{
int pos, newpos;
struct tnode *tp = NULL, *tn = NULL;
if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
tp = tn;
pos = tn->pos + tn->bits;
- n = tnode_get_child(tn, tkey_extract_bits(key, tn->pos, tn->bits));
+ n = tnode_get_child(tn,
+ tkey_extract_bits(key,
+ tn->pos,
+ tn->bits));
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
+ BUG_ON(n && node_parent(n) != tn);
} else
break;
}
/* Case 1: n is a leaf. Compare prefixes */
if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) {
- struct leaf *l = (struct leaf *) n;
-
+ l = (struct leaf *) n;
li = leaf_info_new(plen);
- if (!li) {
- *err = -ENOMEM;
- goto err;
- }
+ if (!li)
+ return NULL;
fa_head = &li->falh;
insert_leaf_info(&l->list, li);
goto done;
}
- t->size++;
l = leaf_new();
- if (!l) {
- *err = -ENOMEM;
- goto err;
- }
+ if (!l)
+ return NULL;
l->key = key;
li = leaf_info_new(plen);
if (!li) {
- tnode_free((struct tnode *) l);
- *err = -ENOMEM;
- goto err;
+ free_leaf(l);
+ return NULL;
}
fa_head = &li->falh;
if (t->trie && n == NULL) {
/* Case 2: n is NULL, and will just insert a new leaf */
- NODE_SET_PARENT(l, tp);
-
- BUG_ON(!tp);
+ node_set_parent((struct node *)l, tp);
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
put_child(t, (struct tnode *)tp, cindex, (struct node *)l);
if (!tn) {
free_leaf_info(li);
- tnode_free((struct tnode *) l);
- *err = -ENOMEM;
- goto err;
+ free_leaf(l);
+ return NULL;
}
- NODE_SET_PARENT(tn, tp);
+ node_set_parent((struct node *)tn, tp);
missbit = tkey_extract_bits(key, newpos, 1);
put_child(t, tn, missbit, (struct node *)l);
if (tp) {
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
- put_child(t, (struct tnode *)tp, cindex, (struct node *)tn);
+ put_child(t, (struct tnode *)tp, cindex,
+ (struct node *)tn);
} else {
- t->trie = (struct node*) tn; /* First tnode */
+ rcu_assign_pointer(t->trie, (struct node *)tn);
tp = tn;
}
}
if (tp && tp->pos + tp->bits > 32)
- printk("ERROR tp=%p pos=%d, bits=%d, key=%0x plen=%d\n",
- tp, tp->pos, tp->bits, key, plen);
+ pr_warning("fib_trie"
+ " tp=%p pos=%d, bits=%d, key=%0x plen=%d\n",
+ tp, tp->pos, tp->bits, key, plen);
/* Rebalance the trie */
- t->trie = trie_rebalance(t, tp);
+
+ rcu_assign_pointer(t->trie, trie_rebalance(t, tp));
done:
- t->revision++;
-err:
return fa_head;
}
-static int
-fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
- struct nlmsghdr *nlhdr, struct netlink_skb_parms *req)
+/*
+ * Caller must hold RTNL.
+ */
+static int fn_trie_insert(struct fib_table *tb, struct fib_config *cfg)
{
struct trie *t = (struct trie *) tb->tb_data;
struct fib_alias *fa, *new_fa;
struct list_head *fa_head = NULL;
struct fib_info *fi;
- int plen = r->rtm_dst_len;
- int type = r->rtm_type;
- u8 tos = r->rtm_tos;
+ int plen = cfg->fc_dst_len;
+ u8 tos = cfg->fc_tos;
u32 key, mask;
int err;
struct leaf *l;
if (plen > 32)
return -EINVAL;
- key = 0;
- if (rta->rta_dst)
- memcpy(&key, rta->rta_dst, 4);
+ key = ntohl(cfg->fc_dst);
- key = ntohl(key);
-
- DBG("Insert table=%d %08x/%d\n", tb->tb_id, key, plen);
+ pr_debug("Insert table=%u %08x/%d\n", tb->tb_id, key, plen);
mask = ntohl(inet_make_mask(plen));
key = key & mask;
- fi = fib_create_info(r, rta, nlhdr, &err);
-
- if (!fi)
+ fi = fib_create_info(cfg);
+ if (IS_ERR(fi)) {
+ err = PTR_ERR(fi);
goto err;
+ }
l = fib_find_node(t, key);
fa = NULL;
* and we need to allocate a new one of those as well.
*/
- if (fa && fa->fa_info->fib_priority == fi->fib_priority) {
- struct fib_alias *fa_orig;
+ if (fa && fa->fa_tos == tos &&
+ fa->fa_info->fib_priority == fi->fib_priority) {
+ struct fib_alias *fa_first, *fa_match;
err = -EEXIST;
- if (nlhdr->nlmsg_flags & NLM_F_EXCL)
+ if (cfg->fc_nlflags & NLM_F_EXCL)
goto out;
- if (nlhdr->nlmsg_flags & NLM_F_REPLACE) {
+ /* We have 2 goals:
+ * 1. Find exact match for type, scope, fib_info to avoid
+ * duplicate routes
+ * 2. Find next 'fa' (or head), NLM_F_APPEND inserts before it
+ */
+ fa_match = NULL;
+ fa_first = fa;
+ fa = list_entry(fa->fa_list.prev, struct fib_alias, fa_list);
+ list_for_each_entry_continue(fa, fa_head, fa_list) {
+ if (fa->fa_tos != tos)
+ break;
+ if (fa->fa_info->fib_priority != fi->fib_priority)
+ break;
+ if (fa->fa_type == cfg->fc_type &&
+ fa->fa_scope == cfg->fc_scope &&
+ fa->fa_info == fi) {
+ fa_match = fa;
+ break;
+ }
+ }
+
+ if (cfg->fc_nlflags & NLM_F_REPLACE) {
struct fib_info *fi_drop;
u8 state;
- write_lock_bh(&fib_lock);
+ fa = fa_first;
+ if (fa_match) {
+ if (fa == fa_match)
+ err = 0;
+ goto out;
+ }
+ err = -ENOBUFS;
+ new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
+ if (new_fa == NULL)
+ goto out;
fi_drop = fa->fa_info;
- fa->fa_info = fi;
- fa->fa_type = type;
- fa->fa_scope = r->rtm_scope;
+ new_fa->fa_tos = fa->fa_tos;
+ new_fa->fa_info = fi;
+ new_fa->fa_type = cfg->fc_type;
+ new_fa->fa_scope = cfg->fc_scope;
state = fa->fa_state;
- fa->fa_state &= ~FA_S_ACCESSED;
+ new_fa->fa_state = state & ~FA_S_ACCESSED;
- write_unlock_bh(&fib_lock);
+ list_replace_rcu(&fa->fa_list, &new_fa->fa_list);
+ alias_free_mem_rcu(fa);
fib_release_info(fi_drop);
if (state & FA_S_ACCESSED)
- rt_cache_flush(-1);
+ rt_cache_flush(cfg->fc_nlinfo.nl_net, -1);
+ rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen,
+ tb->tb_id, &cfg->fc_nlinfo, NLM_F_REPLACE);
goto succeeded;
}
* uses the same scope, type, and nexthop
* information.
*/
- fa_orig = fa;
- list_for_each_entry(fa, fa_orig->fa_list.prev, fa_list) {
- if (fa->fa_tos != tos)
- break;
- if (fa->fa_info->fib_priority != fi->fib_priority)
- break;
- if (fa->fa_type == type &&
- fa->fa_scope == r->rtm_scope &&
- fa->fa_info == fi) {
- goto out;
- }
- }
- if (!(nlhdr->nlmsg_flags & NLM_F_APPEND))
- fa = fa_orig;
+ if (fa_match)
+ goto out;
+
+ if (!(cfg->fc_nlflags & NLM_F_APPEND))
+ fa = fa_first;
}
err = -ENOENT;
- if (!(nlhdr->nlmsg_flags & NLM_F_CREATE))
+ if (!(cfg->fc_nlflags & NLM_F_CREATE))
goto out;
err = -ENOBUFS;
- new_fa = kmem_cache_alloc(fn_alias_kmem, SLAB_KERNEL);
+ new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
if (new_fa == NULL)
goto out;
new_fa->fa_info = fi;
new_fa->fa_tos = tos;
- new_fa->fa_type = type;
- new_fa->fa_scope = r->rtm_scope;
+ new_fa->fa_type = cfg->fc_type;
+ new_fa->fa_scope = cfg->fc_scope;
new_fa->fa_state = 0;
/*
* Insert new entry to the list.
*/
if (!fa_head) {
- fa_head = fib_insert_node(t, &err, key, plen);
- err = 0;
- if (err)
+ fa_head = fib_insert_node(t, key, plen);
+ if (unlikely(!fa_head)) {
+ err = -ENOMEM;
goto out_free_new_fa;
+ }
}
- write_lock_bh(&fib_lock);
-
- list_add_tail(&new_fa->fa_list, (fa ? &fa->fa_list : fa_head));
+ list_add_tail_rcu(&new_fa->fa_list,
+ (fa ? &fa->fa_list : fa_head));
- write_unlock_bh(&fib_lock);
-
- rt_cache_flush(-1);
- rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id, nlhdr, req);
+ rt_cache_flush(cfg->fc_nlinfo.nl_net, -1);
+ rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id,
+ &cfg->fc_nlinfo, 0);
succeeded:
return 0;
return err;
}
-static inline int check_leaf(struct trie *t, struct leaf *l, t_key key, int *plen, const struct flowi *flp,
- struct fib_result *res)
+/* should be called with rcu_read_lock */
+static int check_leaf(struct trie *t, struct leaf *l,
+ t_key key, const struct flowi *flp,
+ struct fib_result *res)
{
- int err, i;
- t_key mask;
struct leaf_info *li;
struct hlist_head *hhead = &l->list;
struct hlist_node *node;
- hlist_for_each_entry(li, node, hhead, hlist) {
- i = li->plen;
- mask = ntohl(inet_make_mask(i));
- if (l->key != (key & mask))
+ hlist_for_each_entry_rcu(li, node, hhead, hlist) {
+ int err;
+ int plen = li->plen;
+ __be32 mask = inet_make_mask(plen);
+
+ if (l->key != (key & ntohl(mask)))
continue;
- if ((err = fib_semantic_match(&li->falh, flp, res, l->key, mask, i)) <= 0) {
- *plen = i;
+ err = fib_semantic_match(&li->falh, flp, res,
+ htonl(l->key), mask, plen);
+
#ifdef CONFIG_IP_FIB_TRIE_STATS
+ if (err <= 0)
t->stats.semantic_match_passed++;
+ else
+ t->stats.semantic_match_miss++;
#endif
+ if (err <= 0)
return err;
- }
-#ifdef CONFIG_IP_FIB_TRIE_STATS
- t->stats.semantic_match_miss++;
-#endif
}
+
return 1;
}
-static int
-fn_trie_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
+static int fn_trie_lookup(struct fib_table *tb, const struct flowi *flp,
+ struct fib_result *res)
{
struct trie *t = (struct trie *) tb->tb_data;
- int plen, ret = 0;
+ int ret;
struct node *n;
struct tnode *pn;
int pos, bits;
t_key node_prefix, key_prefix, pref_mismatch;
int mp;
- n = t->trie;
-
- read_lock(&fib_lock);
+ rcu_read_lock();
+ n = rcu_dereference(t->trie);
if (!n)
goto failed;
/* Just a leaf? */
if (IS_LEAF(n)) {
- if ((ret = check_leaf(t, (struct leaf *)n, key, &plen, flp, res)) <= 0)
- goto found;
- goto failed;
+ ret = check_leaf(t, (struct leaf *)n, key, flp, res);
+ goto found;
}
+
pn = (struct tnode *) n;
chopped_off = 0;
bits = pn->bits;
if (!chopped_off)
- cindex = tkey_extract_bits(MASK_PFX(key, current_prefix_length), pos, bits);
+ cindex = tkey_extract_bits(mask_pfx(key, current_prefix_length),
+ pos, bits);
n = tnode_get_child(pn, cindex);
}
if (IS_LEAF(n)) {
- if ((ret = check_leaf(t, (struct leaf *)n, key, &plen, flp, res)) <= 0)
- goto found;
- else
+ ret = check_leaf(t, (struct leaf *)n, key, flp, res);
+ if (ret > 0)
goto backtrace;
+ goto found;
}
-#define HL_OPTIMIZE
-#ifdef HL_OPTIMIZE
cn = (struct tnode *)n;
/*
* *are* zero.
*/
- /* NOTA BENE: CHECKING ONLY SKIPPED BITS FOR THE NEW NODE HERE */
+ /* NOTA BENE: Checking only skipped bits
+ for the new node here */
if (current_prefix_length < pos+bits) {
if (tkey_extract_bits(cn->key, current_prefix_length,
- cn->pos - current_prefix_length) != 0 ||
- !(cn->child[0]))
+ cn->pos - current_prefix_length)
+ || !(cn->child[0]))
goto backtrace;
}
* new tnode's key.
*/
- /* Note: We aren't very concerned about the piece of the key
- * that precede pn->pos+pn->bits, since these have already been
- * checked. The bits after cn->pos aren't checked since these are
- * by definition "unknown" at this point. Thus, what we want to
- * see is if we are about to enter the "prefix matching" state,
- * and in that case verify that the skipped bits that will prevail
- * throughout this subtree are zero, as they have to be if we are
- * to find a matching prefix.
+ /*
+ * Note: We aren't very concerned about the piece of
+ * the key that precede pn->pos+pn->bits, since these
+ * have already been checked. The bits after cn->pos
+ * aren't checked since these are by definition
+ * "unknown" at this point. Thus, what we want to see
+ * is if we are about to enter the "prefix matching"
+ * state, and in that case verify that the skipped
+ * bits that will prevail throughout this subtree are
+ * zero, as they have to be if we are to find a
+ * matching prefix.
*/
- node_prefix = MASK_PFX(cn->key, cn->pos);
- key_prefix = MASK_PFX(key, cn->pos);
+ node_prefix = mask_pfx(cn->key, cn->pos);
+ key_prefix = mask_pfx(key, cn->pos);
pref_mismatch = key_prefix^node_prefix;
mp = 0;
- /* In short: If skipped bits in this node do not match the search
- * key, enter the "prefix matching" state.directly.
+ /*
+ * In short: If skipped bits in this node do not match
+ * the search key, enter the "prefix matching"
+ * state.directly.
*/
if (pref_mismatch) {
while (!(pref_mismatch & (1<<(KEYLENGTH-1)))) {
mp++;
- pref_mismatch = pref_mismatch <<1;
+ pref_mismatch = pref_mismatch << 1;
}
key_prefix = tkey_extract_bits(cn->key, mp, cn->pos-mp);
if (current_prefix_length >= cn->pos)
current_prefix_length = mp;
}
-#endif
+
pn = (struct tnode *)n; /* Descend */
chopped_off = 0;
continue;
chopped_off++;
/* As zero don't change the child key (cindex) */
- while ((chopped_off <= pn->bits) && !(cindex & (1<<(chopped_off-1))))
+ while ((chopped_off <= pn->bits)
+ && !(cindex & (1<<(chopped_off-1))))
chopped_off++;
/* Decrease current_... with bits chopped off */
if (current_prefix_length > pn->pos + pn->bits - chopped_off)
- current_prefix_length = pn->pos + pn->bits - chopped_off;
+ current_prefix_length = pn->pos + pn->bits
+ - chopped_off;
/*
* Either we do the actual chop off according or if we have
if (chopped_off <= pn->bits) {
cindex &= ~(1 << (chopped_off-1));
} else {
- if (NODE_PARENT(pn) == NULL)
+ struct tnode *parent = node_parent((struct node *) pn);
+ if (!parent)
goto failed;
/* Get Child's index */
- cindex = tkey_extract_bits(pn->key, NODE_PARENT(pn)->pos, NODE_PARENT(pn)->bits);
- pn = NODE_PARENT(pn);
+ cindex = tkey_extract_bits(pn->key, parent->pos, parent->bits);
+ pn = parent;
chopped_off = 0;
#ifdef CONFIG_IP_FIB_TRIE_STATS
failed:
ret = 1;
found:
- read_unlock(&fib_lock);
+ rcu_read_unlock();
return ret;
}
-static int trie_leaf_remove(struct trie *t, t_key key)
+/*
+ * Remove the leaf and return parent.
+ */
+static void trie_leaf_remove(struct trie *t, struct leaf *l)
{
- t_key cindex;
- struct tnode *tp = NULL;
- struct node *n = t->trie;
- struct leaf *l;
-
- DBG("entering trie_leaf_remove(%p)\n", n);
-
- /* Note that in the case skipped bits, those bits are *not* checked!
- * When we finish this, we will have NULL or a T_LEAF, and the
- * T_LEAF may or may not match our key.
- */
-
- while (n != NULL && IS_TNODE(n)) {
- struct tnode *tn = (struct tnode *) n;
- check_tnode(tn);
- n = tnode_get_child(tn ,tkey_extract_bits(key, tn->pos, tn->bits));
-
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
- }
- l = (struct leaf *) n;
-
- if (!n || !tkey_equals(l->key, key))
- return 0;
-
- /*
- * Key found.
- * Remove the leaf and rebalance the tree
- */
+ struct tnode *tp = node_parent((struct node *) l);
- t->revision++;
- t->size--;
-
- tp = NODE_PARENT(n);
- tnode_free((struct tnode *) n);
+ pr_debug("entering trie_leaf_remove(%p)\n", l);
if (tp) {
- cindex = tkey_extract_bits(key, tp->pos, tp->bits);
+ t_key cindex = tkey_extract_bits(l->key, tp->pos, tp->bits);
put_child(t, (struct tnode *)tp, cindex, NULL);
- t->trie = trie_rebalance(t, tp);
+ rcu_assign_pointer(t->trie, trie_rebalance(t, tp));
} else
- t->trie = NULL;
+ rcu_assign_pointer(t->trie, NULL);
- return 1;
+ free_leaf(l);
}
-static int
-fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
- struct nlmsghdr *nlhdr, struct netlink_skb_parms *req)
+/*
+ * Caller must hold RTNL.
+ */
+static int fn_trie_delete(struct fib_table *tb, struct fib_config *cfg)
{
struct trie *t = (struct trie *) tb->tb_data;
u32 key, mask;
- int plen = r->rtm_dst_len;
- u8 tos = r->rtm_tos;
+ int plen = cfg->fc_dst_len;
+ u8 tos = cfg->fc_tos;
struct fib_alias *fa, *fa_to_delete;
struct list_head *fa_head;
struct leaf *l;
- int kill_li = 0;
struct leaf_info *li;
-
if (plen > 32)
return -EINVAL;
- key = 0;
- if (rta->rta_dst)
- memcpy(&key, rta->rta_dst, 4);
-
- key = ntohl(key);
+ key = ntohl(cfg->fc_dst);
mask = ntohl(inet_make_mask(plen));
if (key & ~mask)
if (!fa)
return -ESRCH;
- DBG("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
+ pr_debug("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
fa_to_delete = NULL;
- fa_head = fa->fa_list.prev;
- list_for_each_entry(fa, fa_head, fa_list) {
+ fa = list_entry(fa->fa_list.prev, struct fib_alias, fa_list);
+ list_for_each_entry_continue(fa, fa_head, fa_list) {
struct fib_info *fi = fa->fa_info;
if (fa->fa_tos != tos)
break;
- if ((!r->rtm_type ||
- fa->fa_type == r->rtm_type) &&
- (r->rtm_scope == RT_SCOPE_NOWHERE ||
- fa->fa_scope == r->rtm_scope) &&
- (!r->rtm_protocol ||
- fi->fib_protocol == r->rtm_protocol) &&
- fib_nh_match(r, nlhdr, rta, fi) == 0) {
+ if ((!cfg->fc_type || fa->fa_type == cfg->fc_type) &&
+ (cfg->fc_scope == RT_SCOPE_NOWHERE ||
+ fa->fa_scope == cfg->fc_scope) &&
+ (!cfg->fc_protocol ||
+ fi->fib_protocol == cfg->fc_protocol) &&
+ fib_nh_match(cfg, fi) == 0) {
fa_to_delete = fa;
break;
}
return -ESRCH;
fa = fa_to_delete;
- rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id, nlhdr, req);
+ rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id,
+ &cfg->fc_nlinfo, 0);
l = fib_find_node(t, key);
- li = find_leaf_info(&l->list, plen);
-
- write_lock_bh(&fib_lock);
+ li = find_leaf_info(l, plen);
- list_del(&fa->fa_list);
+ list_del_rcu(&fa->fa_list);
if (list_empty(fa_head)) {
- hlist_del(&li->hlist);
- kill_li = 1;
- }
- write_unlock_bh(&fib_lock);
-
- if (kill_li)
+ hlist_del_rcu(&li->hlist);
free_leaf_info(li);
+ }
if (hlist_empty(&l->list))
- trie_leaf_remove(t, key);
+ trie_leaf_remove(t, l);
if (fa->fa_state & FA_S_ACCESSED)
- rt_cache_flush(-1);
+ rt_cache_flush(cfg->fc_nlinfo.nl_net, -1);
- fn_free_alias(fa);
+ fib_release_info(fa->fa_info);
+ alias_free_mem_rcu(fa);
return 0;
}
-static int trie_flush_list(struct trie *t, struct list_head *head)
+static int trie_flush_list(struct list_head *head)
{
struct fib_alias *fa, *fa_node;
int found = 0;
list_for_each_entry_safe(fa, fa_node, head, fa_list) {
struct fib_info *fi = fa->fa_info;
- if (fi && (fi->fib_flags&RTNH_F_DEAD)) {
- write_lock_bh(&fib_lock);
- list_del(&fa->fa_list);
- write_unlock_bh(&fib_lock);
-
- fn_free_alias(fa);
+ if (fi && (fi->fib_flags & RTNH_F_DEAD)) {
+ list_del_rcu(&fa->fa_list);
+ fib_release_info(fa->fa_info);
+ alias_free_mem_rcu(fa);
found++;
}
}
return found;
}
-static int trie_flush_leaf(struct trie *t, struct leaf *l)
+static int trie_flush_leaf(struct leaf *l)
{
int found = 0;
struct hlist_head *lih = &l->list;
struct leaf_info *li = NULL;
hlist_for_each_entry_safe(li, node, tmp, lih, hlist) {
- found += trie_flush_list(t, &li->falh);
+ found += trie_flush_list(&li->falh);
if (list_empty(&li->falh)) {
- write_lock_bh(&fib_lock);
- hlist_del(&li->hlist);
- write_unlock_bh(&fib_lock);
-
+ hlist_del_rcu(&li->hlist);
free_leaf_info(li);
}
}
return found;
}
-static struct leaf *nextleaf(struct trie *t, struct leaf *thisleaf)
+/*
+ * 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 node *c)
{
- struct node *c = (struct node *) thisleaf;
- struct tnode *p;
- int idx;
-
- if (c == NULL) {
- if (t->trie == NULL)
- return NULL;
-
- if (IS_LEAF(t->trie)) /* trie w. just a leaf */
- return (struct leaf *) t->trie;
+ do {
+ t_key idx;
- p = (struct tnode*) t->trie; /* Start */
- } else
- p = (struct tnode *) NODE_PARENT(c);
-
- while (p) {
- int pos, last;
-
- /* Find the next child of the parent */
if (c)
- pos = 1 + tkey_extract_bits(c->key, p->pos, p->bits);
+ idx = tkey_extract_bits(c->key, p->pos, p->bits) + 1;
else
- pos = 0;
+ idx = 0;
- last = 1 << p->bits;
- for (idx = pos; idx < last ; idx++) {
- if (!p->child[idx])
+ while (idx < 1u << p->bits) {
+ c = tnode_get_child_rcu(p, idx++);
+ if (!c)
continue;
- /* Decend if tnode */
- while (IS_TNODE(p->child[idx])) {
- p = (struct tnode*) p->child[idx];
- idx = 0;
-
- /* Rightmost non-NULL branch */
- if (p && IS_TNODE(p))
- while (p->child[idx] == NULL && idx < (1 << p->bits)) idx++;
-
- /* Done with this tnode? */
- if (idx >= (1 << p->bits) || p->child[idx] == NULL)
- goto up;
+ if (IS_LEAF(c)) {
+ prefetch(p->child[idx]);
+ return (struct leaf *) c;
}
- return (struct leaf*) p->child[idx];
+
+ /* Rescan start scanning in new node */
+ p = (struct tnode *) c;
+ idx = 0;
}
-up:
- /* No more children go up one step */
+
+ /* Node empty, walk back up to parent */
c = (struct node *) p;
- p = (struct tnode *) NODE_PARENT(p);
- }
- return NULL; /* Ready. Root of trie */
+ } while ( (p = node_parent_rcu(c)) != NULL);
+
+ return NULL; /* Root of trie */
}
-static int fn_trie_flush(struct fib_table *tb)
+static struct leaf *trie_firstleaf(struct trie *t)
{
- struct trie *t = (struct trie *) tb->tb_data;
- struct leaf *ll = NULL, *l = NULL;
- int found = 0, h;
+ struct tnode *n = (struct tnode *) rcu_dereference(t->trie);
- t->revision++;
+ if (!n)
+ return NULL;
+
+ if (IS_LEAF(n)) /* trie is just a leaf */
+ return (struct leaf *) n;
+
+ return leaf_walk_rcu(n, NULL);
+}
- for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
- found += trie_flush_leaf(t, l);
+static struct leaf *trie_nextleaf(struct leaf *l)
+{
+ struct node *c = (struct node *) l;
+ struct tnode *p = node_parent(c);
+
+ if (!p)
+ return NULL; /* trie with just one leaf */
+
+ return leaf_walk_rcu(p, c);
+}
+
+static struct leaf *trie_leafindex(struct trie *t, int index)
+{
+ struct leaf *l = trie_firstleaf(t);
+
+ while (l && index-- > 0)
+ l = trie_nextleaf(l);
+
+ return l;
+}
+
+
+/*
+ * Caller must hold RTNL.
+ */
+static int fn_trie_flush(struct fib_table *tb)
+{
+ struct trie *t = (struct trie *) tb->tb_data;
+ struct leaf *l, *ll = NULL;
+ int found = 0;
+
+ for (l = trie_firstleaf(t); l; l = trie_nextleaf(l)) {
+ found += trie_flush_leaf(l);
if (ll && hlist_empty(&ll->list))
- trie_leaf_remove(t, ll->key);
+ trie_leaf_remove(t, ll);
ll = l;
}
if (ll && hlist_empty(&ll->list))
- trie_leaf_remove(t, ll->key);
+ trie_leaf_remove(t, ll);
- DBG("trie_flush found=%d\n", found);
+ pr_debug("trie_flush found=%d\n", found);
return found;
}
-static int trie_last_dflt = -1;
-
-static void
-fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
+static void fn_trie_select_default(struct fib_table *tb,
+ const struct flowi *flp,
+ struct fib_result *res)
{
struct trie *t = (struct trie *) tb->tb_data;
int order, last_idx;
last_resort = NULL;
order = -1;
- read_lock(&fib_lock);
+ rcu_read_lock();
l = fib_find_node(t, 0);
if (!l)
if (list_empty(fa_head))
goto out;
- list_for_each_entry(fa, fa_head, fa_list) {
+ list_for_each_entry_rcu(fa, fa_head, fa_list) {
struct fib_info *next_fi = fa->fa_info;
if (fa->fa_scope != res->scope ||
if (next_fi != res->fi)
break;
} else if (!fib_detect_death(fi, order, &last_resort,
- &last_idx, &trie_last_dflt)) {
- if (res->fi)
- fib_info_put(res->fi);
- res->fi = fi;
- atomic_inc(&fi->fib_clntref);
- trie_last_dflt = order;
+ &last_idx, tb->tb_default)) {
+ fib_result_assign(res, fi);
+ tb->tb_default = order;
goto out;
}
fi = next_fi;
order++;
}
if (order <= 0 || fi == NULL) {
- trie_last_dflt = -1;
+ tb->tb_default = -1;
goto out;
}
- if (!fib_detect_death(fi, order, &last_resort, &last_idx, &trie_last_dflt)) {
- if (res->fi)
- fib_info_put(res->fi);
- res->fi = fi;
- atomic_inc(&fi->fib_clntref);
- trie_last_dflt = order;
+ if (!fib_detect_death(fi, order, &last_resort, &last_idx,
+ tb->tb_default)) {
+ fib_result_assign(res, fi);
+ tb->tb_default = order;
goto out;
}
- if (last_idx >= 0) {
- if (res->fi)
- fib_info_put(res->fi);
- res->fi = last_resort;
- if (last_resort)
- atomic_inc(&last_resort->fib_clntref);
- }
- trie_last_dflt = last_idx;
- out:;
- read_unlock(&fib_lock);
+ if (last_idx >= 0)
+ fib_result_assign(res, last_resort);
+ tb->tb_default = last_idx;
+out:
+ rcu_read_unlock();
}
-static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fib_table *tb,
+static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah,
+ struct fib_table *tb,
struct sk_buff *skb, struct netlink_callback *cb)
{
int i, s_i;
struct fib_alias *fa;
+ __be32 xkey = htonl(key);
- u32 xkey = htonl(key);
-
- s_i = cb->args[3];
+ s_i = cb->args[5];
i = 0;
- list_for_each_entry(fa, fah, fa_list) {
+ /* rcu_read_lock is hold by caller */
+
+ list_for_each_entry_rcu(fa, fah, fa_list) {
if (i < s_i) {
i++;
continue;
}
- if (fa->fa_info->fib_nh == NULL) {
- printk("Trie error _fib_nh=NULL in fa[%d] k=%08x plen=%d\n", i, key, plen);
- i++;
- continue;
- }
- if (fa->fa_info == NULL) {
- printk("Trie error fa_info=NULL in fa[%d] k=%08x plen=%d\n", i, key, plen);
- i++;
- continue;
- }
if (fib_dump_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
tb->tb_id,
fa->fa_type,
fa->fa_scope,
- &xkey,
+ xkey,
plen,
fa->fa_tos,
- fa->fa_info, 0) < 0) {
- cb->args[3] = i;
+ fa->fa_info, NLM_F_MULTI) < 0) {
+ cb->args[5] = i;
return -1;
}
i++;
}
- cb->args[3] = i;
+ cb->args[5] = i;
return skb->len;
}
-static int fn_trie_dump_plen(struct trie *t, int plen, struct fib_table *tb, struct sk_buff *skb,
- struct netlink_callback *cb)
+static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb,
+ struct sk_buff *skb, struct netlink_callback *cb)
{
- int h, s_h;
- struct list_head *fa_head;
- struct leaf *l = NULL;
+ struct leaf_info *li;
+ struct hlist_node *node;
+ int i, s_i;
- s_h = cb->args[2];
+ s_i = cb->args[4];
+ i = 0;
- for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
- if (h < s_h)
+ /* rcu_read_lock is hold by caller */
+ hlist_for_each_entry_rcu(li, node, &l->list, hlist) {
+ if (i < s_i) {
+ i++;
continue;
- if (h > s_h)
- memset(&cb->args[3], 0,
- sizeof(cb->args) - 3*sizeof(cb->args[0]));
-
- fa_head = get_fa_head(l, plen);
+ }
- if (!fa_head)
- continue;
+ if (i > s_i)
+ cb->args[5] = 0;
- if (list_empty(fa_head))
+ if (list_empty(&li->falh))
continue;
- if (fn_trie_dump_fa(l->key, plen, fa_head, tb, skb, cb)<0) {
- cb->args[2] = h;
+ if (fn_trie_dump_fa(l->key, li->plen, &li->falh, tb, skb, cb) < 0) {
+ cb->args[4] = i;
return -1;
}
+ i++;
}
- cb->args[2] = h;
+
+ cb->args[4] = i;
return skb->len;
}
-static int fn_trie_dump(struct fib_table *tb, struct sk_buff *skb, struct netlink_callback *cb)
+static int fn_trie_dump(struct fib_table *tb, struct sk_buff *skb,
+ struct netlink_callback *cb)
{
- int m, s_m;
+ struct leaf *l;
struct trie *t = (struct trie *) tb->tb_data;
+ t_key key = cb->args[2];
+ int count = cb->args[3];
- s_m = cb->args[1];
-
- read_lock(&fib_lock);
- for (m = 0; m <= 32; m++) {
- if (m < s_m)
- continue;
- if (m > s_m)
- memset(&cb->args[2], 0,
- sizeof(cb->args) - 2*sizeof(cb->args[0]));
+ rcu_read_lock();
+ /* Dump starting at last key.
+ * Note: 0.0.0.0/0 (ie default) is first key.
+ */
+ if (count == 0)
+ l = trie_firstleaf(t);
+ else {
+ /* Normally, continue from last key, but if that is missing
+ * fallback to using slow rescan
+ */
+ l = fib_find_node(t, key);
+ if (!l)
+ l = trie_leafindex(t, count);
+ }
- if (fn_trie_dump_plen(t, 32-m, tb, skb, cb)<0) {
- cb->args[1] = m;
- goto out;
+ while (l) {
+ cb->args[2] = l->key;
+ if (fn_trie_dump_leaf(l, tb, skb, cb) < 0) {
+ cb->args[3] = count;
+ rcu_read_unlock();
+ return -1;
}
+
+ ++count;
+ l = trie_nextleaf(l);
+ memset(&cb->args[4], 0,
+ sizeof(cb->args) - 4*sizeof(cb->args[0]));
}
- read_unlock(&fib_lock);
- cb->args[1] = m;
+ cb->args[3] = count;
+ rcu_read_unlock();
+
return skb->len;
-out:
- read_unlock(&fib_lock);
- return -1;
}
-/* Fix more generic FIB names for init later */
+void __init fib_hash_init(void)
+{
+ fn_alias_kmem = kmem_cache_create("ip_fib_alias",
+ sizeof(struct fib_alias),
+ 0, SLAB_PANIC, NULL);
-#ifdef CONFIG_IP_MULTIPLE_TABLES
-struct fib_table * fib_hash_init(int id)
-#else
-struct fib_table * __init fib_hash_init(int id)
-#endif
+ trie_leaf_kmem = kmem_cache_create("ip_fib_trie",
+ max(sizeof(struct leaf),
+ sizeof(struct leaf_info)),
+ 0, SLAB_PANIC, NULL);
+}
+
+
+/* Fix more generic FIB names for init later */
+struct fib_table *fib_hash_table(u32 id)
{
struct fib_table *tb;
struct trie *t;
- if (fn_alias_kmem == NULL)
- fn_alias_kmem = kmem_cache_create("ip_fib_alias",
- sizeof(struct fib_alias),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
-
tb = kmalloc(sizeof(struct fib_table) + sizeof(struct trie),
GFP_KERNEL);
if (tb == NULL)
return NULL;
tb->tb_id = id;
+ tb->tb_default = -1;
tb->tb_lookup = fn_trie_lookup;
tb->tb_insert = fn_trie_insert;
tb->tb_delete = fn_trie_delete;
tb->tb_flush = fn_trie_flush;
tb->tb_select_default = fn_trie_select_default;
tb->tb_dump = fn_trie_dump;
- memset(tb->tb_data, 0, sizeof(struct trie));
t = (struct trie *) tb->tb_data;
-
- trie_init(t);
+ memset(t, 0, sizeof(*t));
if (id == RT_TABLE_LOCAL)
- trie_local = t;
- else if (id == RT_TABLE_MAIN)
- trie_main = t;
-
- if (id == RT_TABLE_LOCAL)
- printk("IPv4 FIB: Using LC-trie version %s\n", VERSION);
+ pr_info("IPv4 FIB: Using LC-trie version %s\n", VERSION);
return tb;
}
-/* Trie dump functions */
+#ifdef CONFIG_PROC_FS
+/* Depth first Trie walk iterator */
+struct fib_trie_iter {
+ struct seq_net_private p;
+ struct fib_table *tb;
+ struct tnode *tnode;
+ unsigned index;
+ unsigned depth;
+};
-static void putspace_seq(struct seq_file *seq, int n)
+static struct node *fib_trie_get_next(struct fib_trie_iter *iter)
{
- while (n--)
- seq_printf(seq, " ");
-}
+ struct tnode *tn = iter->tnode;
+ unsigned cindex = iter->index;
+ struct tnode *p;
-static void printbin_seq(struct seq_file *seq, unsigned int v, int bits)
-{
- while (bits--)
- seq_printf(seq, "%s", (v & (1<<bits))?"1":"0");
-}
+ /* A single entry routing table */
+ if (!tn)
+ return NULL;
-static void printnode_seq(struct seq_file *seq, int indent, struct node *n,
- int pend, int cindex, int bits)
-{
- putspace_seq(seq, indent);
- if (IS_LEAF(n))
- seq_printf(seq, "|");
- else
- seq_printf(seq, "+");
- if (bits) {
- seq_printf(seq, "%d/", cindex);
- printbin_seq(seq, cindex, bits);
- seq_printf(seq, ": ");
- } else
- seq_printf(seq, "<root>: ");
- seq_printf(seq, "%s:%p ", IS_LEAF(n)?"Leaf":"Internal node", n);
+ pr_debug("get_next iter={node=%p index=%d depth=%d}\n",
+ iter->tnode, iter->index, iter->depth);
+rescan:
+ while (cindex < (1<<tn->bits)) {
+ struct node *n = tnode_get_child_rcu(tn, cindex);
- if (IS_LEAF(n)) {
- struct leaf *l = (struct leaf *)n;
- struct fib_alias *fa;
- int i;
-
- seq_printf(seq, "key=%d.%d.%d.%d\n",
- n->key >> 24, (n->key >> 16) % 256, (n->key >> 8) % 256, n->key % 256);
-
- for (i = 32; i >= 0; i--)
- if (find_leaf_info(&l->list, i)) {
- struct list_head *fa_head = get_fa_head(l, i);
-
- if (!fa_head)
- continue;
-
- if (list_empty(fa_head))
- continue;
-
- putspace_seq(seq, indent+2);
- seq_printf(seq, "{/%d...dumping}\n", i);
-
- list_for_each_entry(fa, fa_head, fa_list) {
- putspace_seq(seq, indent+2);
- if (fa->fa_info == NULL) {
- seq_printf(seq, "Error fa_info=NULL\n");
- continue;
- }
- if (fa->fa_info->fib_nh == NULL) {
- seq_printf(seq, "Error _fib_nh=NULL\n");
- continue;
- }
-
- seq_printf(seq, "{type=%d scope=%d TOS=%d}\n",
- fa->fa_type,
- fa->fa_scope,
- fa->fa_tos);
- }
+ if (n) {
+ if (IS_LEAF(n)) {
+ iter->tnode = tn;
+ iter->index = cindex + 1;
+ } else {
+ /* push down one level */
+ iter->tnode = (struct tnode *) n;
+ iter->index = 0;
+ ++iter->depth;
}
- } else {
- struct tnode *tn = (struct tnode *)n;
- int plen = ((struct tnode *)n)->pos;
- t_key prf = MASK_PFX(n->key, plen);
-
- seq_printf(seq, "key=%d.%d.%d.%d/%d\n",
- prf >> 24, (prf >> 16) % 256, (prf >> 8) % 256, prf % 256, plen);
-
- putspace_seq(seq, indent); seq_printf(seq, "| ");
- seq_printf(seq, "{key prefix=%08x/", tn->key & TKEY_GET_MASK(0, tn->pos));
- printbin_seq(seq, tkey_extract_bits(tn->key, 0, tn->pos), tn->pos);
- seq_printf(seq, "}\n");
- putspace_seq(seq, indent); seq_printf(seq, "| ");
- seq_printf(seq, "{pos=%d", tn->pos);
- seq_printf(seq, " (skip=%d bits)", tn->pos - pend);
- seq_printf(seq, " bits=%d (%u children)}\n", tn->bits, (1 << tn->bits));
- putspace_seq(seq, indent); seq_printf(seq, "| ");
- seq_printf(seq, "{empty=%d full=%d}\n", tn->empty_children, tn->full_children);
+ return n;
+ }
+
+ ++cindex;
}
+
+ /* Current node exhausted, pop back up */
+ p = node_parent_rcu((struct node *)tn);
+ if (p) {
+ cindex = tkey_extract_bits(tn->key, p->pos, p->bits)+1;
+ tn = p;
+ --iter->depth;
+ goto rescan;
+ }
+
+ /* got root? */
+ return NULL;
}
-static void trie_dump_seq(struct seq_file *seq, struct trie *t)
+static struct node *fib_trie_get_first(struct fib_trie_iter *iter,
+ struct trie *t)
{
- struct node *n = t->trie;
- int cindex = 0;
- int indent = 1;
- int pend = 0;
- int depth = 0;
- struct tnode *tn;
-
- read_lock(&fib_lock);
+ struct node *n;
- seq_printf(seq, "------ trie_dump of t=%p ------\n", t);
+ if (!t)
+ return NULL;
- if (!n) {
- seq_printf(seq, "------ trie is empty\n");
+ n = rcu_dereference(t->trie);
+ if (!n)
+ return NULL;
- read_unlock(&fib_lock);
- return;
+ if (IS_TNODE(n)) {
+ iter->tnode = (struct tnode *) n;
+ iter->index = 0;
+ iter->depth = 1;
+ } else {
+ iter->tnode = NULL;
+ iter->index = 0;
+ iter->depth = 0;
}
- printnode_seq(seq, indent, n, pend, cindex, 0);
-
- if (!IS_TNODE(n)) {
- read_unlock(&fib_lock);
- return;
- }
+ return n;
+}
- tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
- putspace_seq(seq, indent); seq_printf(seq, "\\--\n");
- indent += 3;
- depth++;
+static void trie_collect_stats(struct trie *t, struct trie_stat *s)
+{
+ struct node *n;
+ struct fib_trie_iter iter;
- while (tn && cindex < (1 << tn->bits)) {
- if (tn->child[cindex]) {
- /* Got a child */
+ memset(s, 0, sizeof(*s));
- printnode_seq(seq, indent, tn->child[cindex], pend, cindex, tn->bits);
- if (IS_LEAF(tn->child[cindex])) {
- cindex++;
- } else {
- /*
- * New tnode. Decend one level
- */
-
- depth++;
- tn = (struct tnode *)tn->child[cindex];
- pend = tn->pos + tn->bits;
- putspace_seq(seq, indent); seq_printf(seq, "\\--\n");
- indent += 3;
- cindex = 0;
- }
- } else
- cindex++;
+ 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;
+ struct hlist_node *tmp;
- /*
- * Test if we are done
- */
+ s->leaves++;
+ s->totdepth += iter.depth;
+ if (iter.depth > s->maxdepth)
+ s->maxdepth = iter.depth;
- while (cindex >= (1 << tn->bits)) {
- /*
- * Move upwards and test for root
- * pop off all traversed nodes
- */
+ hlist_for_each_entry_rcu(li, tmp, &l->list, hlist)
+ ++s->prefixes;
+ } else {
+ const struct tnode *tn = (const struct tnode *) n;
+ int i;
- if (NODE_PARENT(tn) == NULL) {
- tn = NULL;
- break;
- }
+ s->tnodes++;
+ if (tn->bits < MAX_STAT_DEPTH)
+ s->nodesizes[tn->bits]++;
- cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
- cindex++;
- tn = NODE_PARENT(tn);
- pend = tn->pos + tn->bits;
- indent -= 3;
- depth--;
+ for (i = 0; i < (1<<tn->bits); i++)
+ if (!tn->child[i])
+ s->nullpointers++;
}
}
-
- read_unlock(&fib_lock);
+ rcu_read_unlock();
}
-static struct trie_stat *trie_stat_new(void)
+/*
+ * This outputs /proc/net/fib_triestats
+ */
+static void trie_show_stats(struct seq_file *seq, struct trie_stat *stat)
{
- struct trie_stat *s;
- int i;
+ unsigned i, max, pointers, bytes, avdepth;
- s = kmalloc(sizeof(struct trie_stat), GFP_KERNEL);
- if (!s)
- return NULL;
+ if (stat->leaves)
+ avdepth = stat->totdepth*100 / stat->leaves;
+ else
+ avdepth = 0;
+
+ seq_printf(seq, "\tAver depth: %u.%02d\n",
+ avdepth / 100, avdepth % 100);
+ seq_printf(seq, "\tMax depth: %u\n", stat->maxdepth);
+
+ seq_printf(seq, "\tLeaves: %u\n", stat->leaves);
+ bytes = sizeof(struct leaf) * stat->leaves;
- s->totdepth = 0;
- s->maxdepth = 0;
- s->tnodes = 0;
- s->leaves = 0;
- s->nullpointers = 0;
+ seq_printf(seq, "\tPrefixes: %u\n", stat->prefixes);
+ bytes += sizeof(struct leaf_info) * stat->prefixes;
- for (i = 0; i < MAX_CHILDS; i++)
- s->nodesizes[i] = 0;
+ seq_printf(seq, "\tInternal nodes: %u\n\t", stat->tnodes);
+ bytes += sizeof(struct tnode) * stat->tnodes;
- return s;
+ max = MAX_STAT_DEPTH;
+ while (max > 0 && stat->nodesizes[max-1] == 0)
+ max--;
+
+ pointers = 0;
+ for (i = 1; i <= max; i++)
+ if (stat->nodesizes[i] != 0) {
+ seq_printf(seq, " %u: %u", i, stat->nodesizes[i]);
+ pointers += (1<<i) * stat->nodesizes[i];
+ }
+ seq_putc(seq, '\n');
+ seq_printf(seq, "\tPointers: %u\n", pointers);
+
+ bytes += sizeof(struct node *) * pointers;
+ seq_printf(seq, "Null ptrs: %u\n", stat->nullpointers);
+ seq_printf(seq, "Total size: %u kB\n", (bytes + 1023) / 1024);
}
-static struct trie_stat *trie_collect_stats(struct trie *t)
+#ifdef CONFIG_IP_FIB_TRIE_STATS
+static void trie_show_usage(struct seq_file *seq,
+ const struct trie_use_stats *stats)
+{
+ seq_printf(seq, "\nCounters:\n---------\n");
+ seq_printf(seq, "gets = %u\n", stats->gets);
+ seq_printf(seq, "backtracks = %u\n", stats->backtrack);
+ seq_printf(seq, "semantic match passed = %u\n",
+ stats->semantic_match_passed);
+ seq_printf(seq, "semantic match miss = %u\n",
+ stats->semantic_match_miss);
+ seq_printf(seq, "null node hit= %u\n", stats->null_node_hit);
+ seq_printf(seq, "skipped node resize = %u\n\n",
+ stats->resize_node_skipped);
+}
+#endif /* CONFIG_IP_FIB_TRIE_STATS */
+
+static void fib_table_print(struct seq_file *seq, struct fib_table *tb)
{
- struct node *n = t->trie;
- struct trie_stat *s = trie_stat_new();
- int cindex = 0;
- int pend = 0;
- int depth = 0;
+ if (tb->tb_id == RT_TABLE_LOCAL)
+ seq_puts(seq, "Local:\n");
+ else if (tb->tb_id == RT_TABLE_MAIN)
+ seq_puts(seq, "Main:\n");
+ else
+ seq_printf(seq, "Id %d:\n", tb->tb_id);
+}
- if (!s)
- return NULL;
- if (!n)
- return s;
- read_lock(&fib_lock);
+static int fib_triestat_seq_show(struct seq_file *seq, void *v)
+{
+ struct net *net = (struct net *)seq->private;
+ unsigned int h;
- if (IS_TNODE(n)) {
- struct tnode *tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
- s->nodesizes[tn->bits]++;
- depth++;
-
- while (tn && cindex < (1 << tn->bits)) {
- if (tn->child[cindex]) {
- /* Got a child */
-
- if (IS_LEAF(tn->child[cindex])) {
- cindex++;
-
- /* stats */
- if (depth > s->maxdepth)
- s->maxdepth = depth;
- s->totdepth += depth;
- s->leaves++;
- } else {
- /*
- * New tnode. Decend one level
- */
-
- s->tnodes++;
- s->nodesizes[tn->bits]++;
- depth++;
-
- n = tn->child[cindex];
- tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
-
- cindex = 0;
- }
- } else {
- cindex++;
- s->nullpointers++;
- }
+ seq_printf(seq,
+ "Basic info: size of leaf:"
+ " %Zd bytes, size of tnode: %Zd bytes.\n",
+ sizeof(struct leaf), sizeof(struct tnode));
- /*
- * Test if we are done
- */
+ for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
+ struct hlist_head *head = &net->ipv4.fib_table_hash[h];
+ struct hlist_node *node;
+ struct fib_table *tb;
- while (cindex >= (1 << tn->bits)) {
- /*
- * Move upwards and test for root
- * pop off all traversed nodes
- */
+ hlist_for_each_entry_rcu(tb, node, head, tb_hlist) {
+ struct trie *t = (struct trie *) tb->tb_data;
+ struct trie_stat stat;
- if (NODE_PARENT(tn) == NULL) {
- tn = NULL;
- n = NULL;
- break;
- }
+ if (!t)
+ continue;
+
+ fib_table_print(seq, tb);
- cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
- tn = NODE_PARENT(tn);
- cindex++;
- n = (struct node *)tn;
- pend = tn->pos+tn->bits;
- depth--;
- }
+ trie_collect_stats(t, &stat);
+ trie_show_stats(seq, &stat);
+#ifdef CONFIG_IP_FIB_TRIE_STATS
+ trie_show_usage(seq, &t->stats);
+#endif
}
}
- read_unlock(&fib_lock);
- return s;
+ return 0;
}
-#ifdef CONFIG_PROC_FS
-
-static struct fib_alias *fib_triestat_get_first(struct seq_file *seq)
+static int fib_triestat_seq_open(struct inode *inode, struct file *file)
{
- return NULL;
+ return single_open_net(inode, file, fib_triestat_seq_show);
}
-static struct fib_alias *fib_triestat_get_next(struct seq_file *seq)
+static const struct file_operations fib_triestat_fops = {
+ .owner = THIS_MODULE,
+ .open = fib_triestat_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+static struct node *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);
+ loff_t idx = 0;
+ unsigned int h;
+
+ for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
+ struct hlist_head *head = &net->ipv4.fib_table_hash[h];
+ struct hlist_node *node;
+ struct fib_table *tb;
+
+ hlist_for_each_entry_rcu(tb, node, head, tb_hlist) {
+ struct node *n;
+
+ for (n = fib_trie_get_first(iter,
+ (struct trie *) tb->tb_data);
+ n; n = fib_trie_get_next(iter))
+ if (pos == idx++) {
+ iter->tb = tb;
+ return n;
+ }
+ }
+ }
+
return NULL;
}
-static void *fib_triestat_seq_start(struct seq_file *seq, loff_t *pos)
+static void *fib_trie_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(RCU)
{
- if (!ip_fib_main_table)
- return NULL;
-
- if (*pos)
- return fib_triestat_get_next(seq);
- else
- return SEQ_START_TOKEN;
+ rcu_read_lock();
+ return fib_trie_get_idx(seq, *pos);
}
-static void *fib_triestat_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+static void *fib_trie_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
+ struct fib_trie_iter *iter = seq->private;
+ struct net *net = seq_file_net(seq);
+ struct fib_table *tb = iter->tb;
+ struct hlist_node *tb_node;
+ unsigned int h;
+ struct node *n;
+
++*pos;
- if (v == SEQ_START_TOKEN)
- return fib_triestat_get_first(seq);
- else
- return fib_triestat_get_next(seq);
+ /* next node in same table */
+ n = fib_trie_get_next(iter);
+ if (n)
+ return n;
+
+ /* walk rest of this hash chain */
+ h = tb->tb_id & (FIB_TABLE_HASHSZ - 1);
+ while ( (tb_node = rcu_dereference(tb->tb_hlist.next)) ) {
+ tb = hlist_entry(tb_node, struct fib_table, tb_hlist);
+ n = fib_trie_get_first(iter, (struct trie *) tb->tb_data);
+ if (n)
+ goto found;
+ }
+
+ /* new hash chain */
+ while (++h < FIB_TABLE_HASHSZ) {
+ struct hlist_head *head = &net->ipv4.fib_table_hash[h];
+ hlist_for_each_entry_rcu(tb, tb_node, head, tb_hlist) {
+ n = fib_trie_get_first(iter, (struct trie *) tb->tb_data);
+ if (n)
+ goto found;
+ }
+ }
+ return NULL;
+
+found:
+ iter->tb = tb;
+ return n;
}
-static void fib_triestat_seq_stop(struct seq_file *seq, void *v)
+static void fib_trie_seq_stop(struct seq_file *seq, void *v)
+ __releases(RCU)
{
-
+ rcu_read_unlock();
}
-/*
- * This outputs /proc/net/fib_triestats
- *
- * It always works in backward compatibility mode.
- * The format of the file is not supposed to be changed.
- */
+static void seq_indent(struct seq_file *seq, int n)
+{
+ while (n-- > 0) seq_puts(seq, " ");
+}
-static void collect_and_show(struct trie *t, struct seq_file *seq)
+static inline const char *rtn_scope(char *buf, size_t len, enum rt_scope_t s)
{
- int bytes = 0; /* How many bytes are used, a ref is 4 bytes */
- int i, max, pointers;
- struct trie_stat *stat;
- int avdepth;
+ switch (s) {
+ case RT_SCOPE_UNIVERSE: return "universe";
+ case RT_SCOPE_SITE: return "site";
+ case RT_SCOPE_LINK: return "link";
+ case RT_SCOPE_HOST: return "host";
+ case RT_SCOPE_NOWHERE: return "nowhere";
+ default:
+ snprintf(buf, len, "scope=%d", s);
+ return buf;
+ }
+}
- stat = trie_collect_stats(t);
+static const char *rtn_type_names[__RTN_MAX] = {
+ [RTN_UNSPEC] = "UNSPEC",
+ [RTN_UNICAST] = "UNICAST",
+ [RTN_LOCAL] = "LOCAL",
+ [RTN_BROADCAST] = "BROADCAST",
+ [RTN_ANYCAST] = "ANYCAST",
+ [RTN_MULTICAST] = "MULTICAST",
+ [RTN_BLACKHOLE] = "BLACKHOLE",
+ [RTN_UNREACHABLE] = "UNREACHABLE",
+ [RTN_PROHIBIT] = "PROHIBIT",
+ [RTN_THROW] = "THROW",
+ [RTN_NAT] = "NAT",
+ [RTN_XRESOLVE] = "XRESOLVE",
+};
- bytes = 0;
- seq_printf(seq, "trie=%p\n", t);
+static inline const char *rtn_type(char *buf, size_t len, unsigned t)
+{
+ if (t < __RTN_MAX && rtn_type_names[t])
+ return rtn_type_names[t];
+ snprintf(buf, len, "type %u", t);
+ return buf;
+}
- if (stat) {
- if (stat->leaves)
- avdepth = stat->totdepth*100 / stat->leaves;
- else
- avdepth = 0;
- seq_printf(seq, "Aver depth: %d.%02d\n", avdepth / 100, avdepth % 100);
- seq_printf(seq, "Max depth: %4d\n", stat->maxdepth);
+/* Pretty print the trie */
+static int fib_trie_seq_show(struct seq_file *seq, void *v)
+{
+ const struct fib_trie_iter *iter = seq->private;
+ struct node *n = v;
- seq_printf(seq, "Leaves: %d\n", stat->leaves);
- bytes += sizeof(struct leaf) * stat->leaves;
- seq_printf(seq, "Internal nodes: %d\n", stat->tnodes);
- bytes += sizeof(struct tnode) * stat->tnodes;
+ if (!node_parent_rcu(n))
+ fib_table_print(seq, iter->tb);
- max = MAX_CHILDS-1;
+ if (IS_TNODE(n)) {
+ struct tnode *tn = (struct tnode *) n;
+ __be32 prf = htonl(mask_pfx(tn->key, tn->pos));
- while (max >= 0 && stat->nodesizes[max] == 0)
- max--;
- pointers = 0;
+ 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);
- for (i = 1; i <= max; i++)
- if (stat->nodesizes[i] != 0) {
- seq_printf(seq, " %d: %d", i, stat->nodesizes[i]);
- pointers += (1<<i) * stat->nodesizes[i];
+ } else {
+ struct leaf *l = (struct leaf *) n;
+ struct leaf_info *li;
+ struct hlist_node *node;
+ __be32 val = htonl(l->key);
+
+ seq_indent(seq, iter->depth);
+ seq_printf(seq, " |-- %pI4\n", &val);
+
+ hlist_for_each_entry_rcu(li, node, &l->list, hlist) {
+ struct fib_alias *fa;
+
+ list_for_each_entry_rcu(fa, &li->falh, fa_list) {
+ char buf1[32], buf2[32];
+
+ seq_indent(seq, iter->depth+1);
+ seq_printf(seq, " /%d %s %s", li->plen,
+ rtn_scope(buf1, sizeof(buf1),
+ fa->fa_scope),
+ rtn_type(buf2, sizeof(buf2),
+ fa->fa_type));
+ if (fa->fa_tos)
+ seq_printf(seq, " tos=%d", fa->fa_tos);
+ seq_putc(seq, '\n');
}
- seq_printf(seq, "\n");
- seq_printf(seq, "Pointers: %d\n", pointers);
- bytes += sizeof(struct node *) * pointers;
- seq_printf(seq, "Null ptrs: %d\n", stat->nullpointers);
- seq_printf(seq, "Total size: %d kB\n", bytes / 1024);
-
- kfree(stat);
+ }
}
-#ifdef CONFIG_IP_FIB_TRIE_STATS
- seq_printf(seq, "Counters:\n---------\n");
- seq_printf(seq,"gets = %d\n", t->stats.gets);
- seq_printf(seq,"backtracks = %d\n", t->stats.backtrack);
- seq_printf(seq,"semantic match passed = %d\n", t->stats.semantic_match_passed);
- seq_printf(seq,"semantic match miss = %d\n", t->stats.semantic_match_miss);
- seq_printf(seq,"null node hit= %d\n", t->stats.null_node_hit);
- seq_printf(seq,"skipped node resize = %d\n", t->stats.resize_node_skipped);
-#ifdef CLEAR_STATS
- memset(&(t->stats), 0, sizeof(t->stats));
-#endif
-#endif /* CONFIG_IP_FIB_TRIE_STATS */
-}
-
-static int fib_triestat_seq_show(struct seq_file *seq, void *v)
-{
- char bf[128];
-
- if (v == SEQ_START_TOKEN) {
- seq_printf(seq, "Basic info: size of leaf: %Zd bytes, size of tnode: %Zd bytes.\n",
- sizeof(struct leaf), sizeof(struct tnode));
- if (trie_local)
- collect_and_show(trie_local, seq);
-
- if (trie_main)
- collect_and_show(trie_main, seq);
- } else {
- snprintf(bf, sizeof(bf), "*\t%08X\t%08X", 200, 400);
-
- seq_printf(seq, "%-127s\n", bf);
- }
return 0;
}
-static struct seq_operations fib_triestat_seq_ops = {
- .start = fib_triestat_seq_start,
- .next = fib_triestat_seq_next,
- .stop = fib_triestat_seq_stop,
- .show = fib_triestat_seq_show,
+static const struct seq_operations fib_trie_seq_ops = {
+ .start = fib_trie_seq_start,
+ .next = fib_trie_seq_next,
+ .stop = fib_trie_seq_stop,
+ .show = fib_trie_seq_show,
};
-static int fib_triestat_seq_open(struct inode *inode, struct file *file)
+static int fib_trie_seq_open(struct inode *inode, struct file *file)
{
- struct seq_file *seq;
- int rc = -ENOMEM;
-
- rc = seq_open(file, &fib_triestat_seq_ops);
- if (rc)
- goto out_kfree;
-
- seq = file->private_data;
-out:
- return rc;
-out_kfree:
- goto out;
+ return seq_open_net(inode, file, &fib_trie_seq_ops,
+ sizeof(struct fib_trie_iter));
}
-static struct file_operations fib_triestat_seq_fops = {
- .owner = THIS_MODULE,
- .open = fib_triestat_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
+static const struct file_operations fib_trie_fops = {
+ .owner = THIS_MODULE,
+ .open = fib_trie_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_net,
};
-int __init fib_stat_proc_init(void)
-{
- if (!proc_net_fops_create("fib_triestat", S_IRUGO, &fib_triestat_seq_fops))
- return -ENOMEM;
- return 0;
-}
+struct fib_route_iter {
+ struct seq_net_private p;
+ struct trie *main_trie;
+ loff_t pos;
+ t_key key;
+};
-void __init fib_stat_proc_exit(void)
+static struct leaf *fib_route_get_idx(struct fib_route_iter *iter, loff_t pos)
{
- proc_net_remove("fib_triestat");
-}
+ struct leaf *l = NULL;
+ struct trie *t = iter->main_trie;
+
+ /* use cache location of last found key */
+ if (iter->pos > 0 && pos >= iter->pos && (l = fib_find_node(t, iter->key)))
+ pos -= iter->pos;
+ else {
+ iter->pos = 0;
+ l = trie_firstleaf(t);
+ }
-static struct fib_alias *fib_trie_get_first(struct seq_file *seq)
-{
- return NULL;
-}
+ while (l && pos-- > 0) {
+ iter->pos++;
+ l = trie_nextleaf(l);
+ }
-static struct fib_alias *fib_trie_get_next(struct seq_file *seq)
-{
- return NULL;
+ if (l)
+ iter->key = pos; /* remember it */
+ else
+ iter->pos = 0; /* forget it */
+
+ return l;
}
-static void *fib_trie_seq_start(struct seq_file *seq, loff_t *pos)
+static void *fib_route_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(RCU)
{
- if (!ip_fib_main_table)
+ struct fib_route_iter *iter = seq->private;
+ struct fib_table *tb;
+
+ rcu_read_lock();
+ tb = fib_get_table(seq_file_net(seq), RT_TABLE_MAIN);
+ if (!tb)
return NULL;
- if (*pos)
- return fib_trie_get_next(seq);
- else
+ iter->main_trie = (struct trie *) tb->tb_data;
+ if (*pos == 0)
return SEQ_START_TOKEN;
+ else
+ return fib_route_get_idx(iter, *pos - 1);
}
-static void *fib_trie_seq_next(struct seq_file *seq, void *v, 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;
+
++*pos;
- if (v == SEQ_START_TOKEN)
- return fib_trie_get_first(seq);
+ if (v == SEQ_START_TOKEN) {
+ iter->pos = 0;
+ l = trie_firstleaf(iter->main_trie);
+ } else {
+ iter->pos++;
+ l = trie_nextleaf(l);
+ }
+
+ if (l)
+ iter->key = l->key;
else
- return fib_trie_get_next(seq);
+ iter->pos = 0;
+ return l;
+}
+static void fib_route_seq_stop(struct seq_file *seq, void *v)
+ __releases(RCU)
+{
+ rcu_read_unlock();
}
-static void fib_trie_seq_stop(struct seq_file *seq, void *v)
+static unsigned fib_flag_trans(int type, __be32 mask, const struct fib_info *fi)
{
+ static unsigned type2flags[RTN_MAX + 1] = {
+ [7] = RTF_REJECT, [8] = RTF_REJECT,
+ };
+ unsigned flags = type2flags[type];
+
+ if (fi && fi->fib_nh->nh_gw)
+ flags |= RTF_GATEWAY;
+ if (mask == htonl(0xFFFFFFFF))
+ flags |= RTF_HOST;
+ flags |= RTF_UP;
+ return flags;
}
/*
- * This outputs /proc/net/fib_trie.
- *
- * It always works in backward compatibility mode.
- * The format of the file is not supposed to be changed.
+ * This outputs /proc/net/route.
+ * The format of the file is not supposed to be changed
+ * and needs to be same as fib_hash output to avoid breaking
+ * legacy utilities
*/
-
-static int fib_trie_seq_show(struct seq_file *seq, void *v)
+static int fib_route_seq_show(struct seq_file *seq, void *v)
{
- char bf[128];
+ struct leaf *l = v;
+ struct leaf_info *li;
+ struct hlist_node *node;
if (v == SEQ_START_TOKEN) {
- if (trie_local)
- trie_dump_seq(seq, trie_local);
+ seq_printf(seq, "%-127s\n", "Iface\tDestination\tGateway "
+ "\tFlags\tRefCnt\tUse\tMetric\tMask\t\tMTU"
+ "\tWindow\tIRTT");
+ return 0;
+ }
- if (trie_main)
- trie_dump_seq(seq, trie_main);
- } else {
- snprintf(bf, sizeof(bf),
- "*\t%08X\t%08X", 200, 400);
- seq_printf(seq, "%-127s\n", bf);
+ hlist_for_each_entry_rcu(li, node, &l->list, hlist) {
+ struct fib_alias *fa;
+ __be32 mask, prefix;
+
+ mask = inet_make_mask(li->plen);
+ prefix = htonl(l->key);
+
+ list_for_each_entry_rcu(fa, &li->falh, fa_list) {
+ const struct fib_info *fi = fa->fa_info;
+ unsigned flags = fib_flag_trans(fa->fa_type, mask, fi);
+ int len;
+
+ if (fa->fa_type == RTN_BROADCAST
+ || fa->fa_type == RTN_MULTICAST)
+ continue;
+
+ if (fi)
+ seq_printf(seq,
+ "%s\t%08X\t%08X\t%04X\t%d\t%u\t"
+ "%d\t%08X\t%d\t%u\t%u%n",
+ fi->fib_dev ? fi->fib_dev->name : "*",
+ prefix,
+ fi->fib_nh->nh_gw, flags, 0, 0,
+ fi->fib_priority,
+ mask,
+ (fi->fib_advmss ?
+ fi->fib_advmss + 40 : 0),
+ fi->fib_window,
+ fi->fib_rtt >> 3, &len);
+ else
+ seq_printf(seq,
+ "*\t%08X\t%08X\t%04X\t%d\t%u\t"
+ "%d\t%08X\t%d\t%u\t%u%n",
+ prefix, 0, flags, 0, 0, 0,
+ mask, 0, 0, 0, &len);
+
+ seq_printf(seq, "%*s\n", 127 - len, "");
+ }
}
return 0;
}
-static struct seq_operations fib_trie_seq_ops = {
- .start = fib_trie_seq_start,
- .next = fib_trie_seq_next,
- .stop = fib_trie_seq_stop,
- .show = fib_trie_seq_show,
+static const struct seq_operations fib_route_seq_ops = {
+ .start = fib_route_seq_start,
+ .next = fib_route_seq_next,
+ .stop = fib_route_seq_stop,
+ .show = fib_route_seq_show,
};
-static int fib_trie_seq_open(struct inode *inode, struct file *file)
+static int fib_route_seq_open(struct inode *inode, struct file *file)
{
- struct seq_file *seq;
- int rc = -ENOMEM;
-
- rc = seq_open(file, &fib_trie_seq_ops);
- if (rc)
- goto out_kfree;
-
- seq = file->private_data;
-out:
- return rc;
-out_kfree:
- goto out;
+ return seq_open_net(inode, file, &fib_route_seq_ops,
+ sizeof(struct fib_route_iter));
}
-static struct file_operations fib_trie_seq_fops = {
- .owner = THIS_MODULE,
- .open = fib_trie_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release= seq_release_private,
+static const struct file_operations fib_route_fops = {
+ .owner = THIS_MODULE,
+ .open = fib_route_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_net,
};
-int __init fib_proc_init(void)
+int __net_init fib_proc_init(struct net *net)
{
- if (!proc_net_fops_create("fib_trie", S_IRUGO, &fib_trie_seq_fops))
- return -ENOMEM;
+ if (!proc_net_fops_create(net, "fib_trie", S_IRUGO, &fib_trie_fops))
+ goto out1;
+
+ if (!proc_net_fops_create(net, "fib_triestat", S_IRUGO,
+ &fib_triestat_fops))
+ goto out2;
+
+ if (!proc_net_fops_create(net, "route", S_IRUGO, &fib_route_fops))
+ goto out3;
+
return 0;
+
+out3:
+ proc_net_remove(net, "fib_triestat");
+out2:
+ proc_net_remove(net, "fib_trie");
+out1:
+ return -ENOMEM;
}
-void __init fib_proc_exit(void)
+void __net_exit fib_proc_exit(struct net *net)
{
- proc_net_remove("fib_trie");
+ proc_net_remove(net, "fib_trie");
+ proc_net_remove(net, "fib_triestat");
+ proc_net_remove(net, "route");
}
#endif /* CONFIG_PROC_FS */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff