struct tnode __rcu *child[0];
};
/* This list pointer if valid if bits == 0 (LEAF) */
- struct hlist_head list;
+ struct hlist_head leaf;
};
};
-struct leaf_info {
- struct hlist_node hlist;
- unsigned char slen;
- struct hlist_head falh;
- struct rcu_head rcu;
-};
-
#ifdef CONFIG_IP_FIB_TRIE_STATS
struct trie_use_stats {
unsigned int gets;
#define node_free(n) call_rcu(&n->rcu, __node_free_rcu)
-static inline void free_leaf_info(struct leaf_info *leaf)
-{
- kfree_rcu(leaf, rcu);
-}
-
static struct tnode *tnode_alloc(size_t size)
{
if (size <= PAGE_SIZE)
/* set bits to 0 indicating we are not a tnode */
l->bits = 0;
- INIT_HLIST_HEAD(&l->list);
+ INIT_HLIST_HEAD(&l->leaf);
}
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->slen = KEYLENGTH - plen;
- INIT_HLIST_HEAD(&li->falh);
- }
- return li;
-}
-
static struct tnode *tnode_new(t_key key, int pos, int bits)
{
size_t sz = offsetof(struct tnode, child[1ul << bits]);
}
}
-/* readside must use rcu_read_lock currently dump routines
- via get_fa_head and dump */
-
-static struct leaf_info *find_leaf_info(struct tnode *l, int plen)
-{
- struct hlist_head *head = &l->list;
- struct leaf_info *li;
- int slen = KEYLENGTH - plen;
-
- hlist_for_each_entry_rcu(li, head, hlist)
- if (li->slen == slen)
- return li;
-
- return NULL;
-}
-
-static inline struct hlist_head *get_fa_head(struct tnode *l, int plen)
-{
- struct leaf_info *li = find_leaf_info(l, plen);
-
- if (!li)
- return NULL;
-
- return &li->falh;
-}
-
static void leaf_pull_suffix(struct tnode *l)
{
struct tnode *tp = node_parent(l);
}
}
-static void remove_leaf_info(struct tnode *l, struct leaf_info *old)
+static void fib_remove_alias(struct tnode *l, struct fib_alias *old)
{
/* record the location of the previous list_info entry */
- struct hlist_node **pprev = old->hlist.pprev;
- struct leaf_info *li = hlist_entry(pprev, typeof(*li), hlist.next);
+ struct hlist_node **pprev = old->fa_list.pprev;
+ struct fib_alias *fa = hlist_entry(pprev, typeof(*fa), fa_list.next);
- /* remove the leaf info from the list */
- hlist_del_rcu(&old->hlist);
+ /* remove the fib_alias from the list */
+ hlist_del_rcu(&old->fa_list);
- /* only access li if it is pointing at the last valid hlist_node */
- if (hlist_empty(&l->list) || (*pprev))
+ /* only access fa if it is pointing at the last valid hlist_node */
+ if (hlist_empty(&l->leaf) || (*pprev))
return;
/* update the trie with the latest suffix length */
- l->slen = li->slen;
+ l->slen = fa->fa_slen;
leaf_pull_suffix(l);
}
-static void insert_leaf_info(struct tnode *l, struct leaf_info *new)
+static void fib_insert_alias(struct tnode *l, struct fib_alias *fa,
+ struct fib_alias *new)
{
- struct hlist_head *head = &l->list;
- struct leaf_info *li, *last = NULL;
+ if (fa) {
+ hlist_add_before_rcu(&new->fa_list, &fa->fa_list);
+ } else {
+ struct fib_alias *last;
- hlist_for_each_entry(li, head, hlist) {
- if (new->slen < li->slen)
- break;
- last = li;
- }
+ hlist_for_each_entry(last, &l->leaf, fa_list) {
+ if (new->fa_slen < last->fa_slen)
+ break;
+ fa = last;
+ }
- if (last)
- hlist_add_behind_rcu(&new->hlist, &last->hlist);
- else
- hlist_add_head_rcu(&new->hlist, head);
+ if (fa)
+ hlist_add_behind_rcu(&new->fa_list, &fa->fa_list);
+ else
+ hlist_add_head_rcu(&new->fa_list, &l->leaf);
+ }
/* if we added to the tail node then we need to update slen */
- if (l->slen < new->slen) {
- l->slen = new->slen;
+ if (l->slen < new->fa_slen) {
+ l->slen = new->fa_slen;
leaf_push_suffix(l);
}
}
/* Return the first fib alias matching TOS with
* priority less than or equal to PRIO.
*/
-static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 tos,
- u32 prio)
+static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 slen,
+ u8 tos, u32 prio)
{
struct fib_alias *fa;
return NULL;
hlist_for_each_entry(fa, fah, fa_list) {
+ if (fa->fa_slen < slen)
+ continue;
+ if (fa->fa_slen != slen)
+ break;
if (fa->fa_tos > tos)
continue;
if (fa->fa_info->fib_priority >= prio || fa->fa_tos < tos)
/* only used from updater-side */
-static struct hlist_head *fib_insert_node(struct trie *t, u32 key, int plen)
+static struct tnode *fib_insert_node(struct trie *t, u32 key, int plen)
{
- struct hlist_head *fa_head = NULL;
struct tnode *l, *n, *tp = NULL;
- struct leaf_info *li;
-
- li = leaf_info_new(plen);
- if (!li)
- return NULL;
- fa_head = &li->falh;
n = rtnl_dereference(t->trie);
/* we have found a leaf. Prefixes have already been compared */
if (IS_LEAF(n)) {
/* Case 1: n is a leaf, and prefixes match*/
- insert_leaf_info(n, li);
- return fa_head;
+ return n;
}
tp = n;
}
l = leaf_new(key);
- if (!l) {
- free_leaf_info(li);
+ if (!l)
return NULL;
- }
-
- insert_leaf_info(l, li);
/* Case 2: n is a LEAF or a TNODE and the key doesn't match.
*
tn = tnode_new(key, __fls(key ^ n->key), 1);
if (!tn) {
- free_leaf_info(li);
node_free(l);
return NULL;
}
rcu_assign_pointer(t->trie, l);
}
- return fa_head;
+ return l;
}
/*
{
struct trie *t = (struct trie *) tb->tb_data;
struct fib_alias *fa, *new_fa;
- struct hlist_head *fa_head = NULL;
struct fib_info *fi;
- int plen = cfg->fc_dst_len;
+ u8 plen = cfg->fc_dst_len;
+ u8 slen = KEYLENGTH - plen;
u8 tos = cfg->fc_tos;
u32 key, mask;
int err;
if (key & ~mask)
return -EINVAL;
- key = key & mask;
-
fi = fib_create_info(cfg);
if (IS_ERR(fi)) {
err = PTR_ERR(fi);
}
l = fib_find_node(t, key);
- fa = NULL;
-
- if (l) {
- fa_head = get_fa_head(l, plen);
- fa = fib_find_alias(fa_head, tos, fi->fib_priority);
- }
+ fa = l ? fib_find_alias(&l->leaf, slen, tos, fi->fib_priority) : NULL;
/* Now fa, if non-NULL, points to the first fib alias
* with the same keys [prefix,tos,priority], if such key already
fa_match = NULL;
fa_first = fa;
hlist_for_each_entry_from(fa, fa_list) {
- if (fa->fa_tos != tos)
+ if ((fa->fa_slen != slen) || (fa->fa_tos != tos))
break;
if (fa->fa_info->fib_priority != fi->fib_priority)
break;
new_fa->fa_tos = tos;
new_fa->fa_type = cfg->fc_type;
new_fa->fa_state = 0;
- new_fa->fa_slen = KEYLENGTH - plen;
+ new_fa->fa_slen = slen;
/* Insert new entry to the list. */
- if (!fa_head) {
- fa_head = fib_insert_node(t, key, plen);
- if (unlikely(!fa_head)) {
+ if (!l) {
+ l = fib_insert_node(t, key, plen);
+ if (unlikely(!l)) {
err = -ENOMEM;
goto out_free_new_fa;
}
if (!plen)
tb->tb_num_default++;
- if (fa) {
- hlist_add_before_rcu(&new_fa->fa_list, &fa->fa_list);
- } else {
- struct fib_alias *last;
-
- hlist_for_each_entry(last, fa_head, fa_list)
- fa = last;
-
- if (fa)
- hlist_add_behind_rcu(&new_fa->fa_list, &fa->fa_list);
- else
- hlist_add_head_rcu(&new_fa->fa_list, fa_head);
- }
+ fib_insert_alias(l, fa, new_fa);
rt_cache_flush(cfg->fc_nlinfo.nl_net);
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id,
#endif
const t_key key = ntohl(flp->daddr);
struct tnode *n, *pn;
- struct leaf_info *li;
+ struct fib_alias *fa;
t_key cindex;
n = rcu_dereference(t->trie);
found:
/* Step 3: Process the leaf, if that fails fall back to backtracing */
- hlist_for_each_entry_rcu(li, &n->list, hlist) {
- struct fib_alias *fa;
-
- hlist_for_each_entry_rcu(fa, &li->falh, fa_list) {
- struct fib_info *fi = fa->fa_info;
- int nhsel, err;
+ hlist_for_each_entry_rcu(fa, &n->leaf, fa_list) {
+ struct fib_info *fi = fa->fa_info;
+ int nhsel, err;
- if (((key ^ n->key) >= (1ul << fa->fa_slen)) &&
- ((BITS_PER_LONG > KEYLENGTH) ||
- (fa->fa_slen != KEYLENGTH)))
- continue;
- if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos)
- continue;
- if (fi->fib_dead)
+ if (((key ^ n->key) >= (1ul << fa->fa_slen)) &&
+ ((BITS_PER_LONG > KEYLENGTH) || (fa->fa_slen != KEYLENGTH)))
continue;
- if (fa->fa_info->fib_scope < flp->flowi4_scope)
- continue;
- fib_alias_accessed(fa);
- err = fib_props[fa->fa_type].error;
- if (unlikely(err < 0)) {
+ if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos)
+ continue;
+ if (fi->fib_dead)
+ continue;
+ if (fa->fa_info->fib_scope < flp->flowi4_scope)
+ continue;
+ fib_alias_accessed(fa);
+ err = fib_props[fa->fa_type].error;
+ if (unlikely(err < 0)) {
#ifdef CONFIG_IP_FIB_TRIE_STATS
- this_cpu_inc(stats->semantic_match_passed);
+ this_cpu_inc(stats->semantic_match_passed);
#endif
- return err;
- }
- if (fi->fib_flags & RTNH_F_DEAD)
+ return err;
+ }
+ if (fi->fib_flags & RTNH_F_DEAD)
+ continue;
+ for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
+ const struct fib_nh *nh = &fi->fib_nh[nhsel];
+
+ if (nh->nh_flags & RTNH_F_DEAD)
+ continue;
+ if (flp->flowi4_oif && flp->flowi4_oif != nh->nh_oif)
continue;
- for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
- const struct fib_nh *nh = &fi->fib_nh[nhsel];
-
- if (nh->nh_flags & RTNH_F_DEAD)
- continue;
- if (flp->flowi4_oif && flp->flowi4_oif != nh->nh_oif)
- continue;
-
- if (!(fib_flags & FIB_LOOKUP_NOREF))
- atomic_inc(&fi->fib_clntref);
-
- res->prefixlen = KEYLENGTH - fa->fa_slen;
- res->nh_sel = nhsel;
- res->type = fa->fa_type;
- res->scope = fi->fib_scope;
- res->fi = fi;
- res->table = tb;
- res->fa_head = &li->falh;
+
+ if (!(fib_flags & FIB_LOOKUP_NOREF))
+ atomic_inc(&fi->fib_clntref);
+
+ res->prefixlen = KEYLENGTH - fa->fa_slen;
+ res->nh_sel = nhsel;
+ res->type = fa->fa_type;
+ res->scope = fi->fib_scope;
+ res->fi = fi;
+ res->table = tb;
+ res->fa_head = &n->leaf;
#ifdef CONFIG_IP_FIB_TRIE_STATS
- this_cpu_inc(stats->semantic_match_passed);
+ this_cpu_inc(stats->semantic_match_passed);
#endif
- return err;
- }
+ return err;
}
}
#ifdef CONFIG_IP_FIB_TRIE_STATS
int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
{
struct trie *t = (struct trie *) tb->tb_data;
- u32 key, mask;
- int plen = cfg->fc_dst_len;
- u8 tos = cfg->fc_tos;
struct fib_alias *fa, *fa_to_delete;
- struct hlist_head *fa_head;
+ u8 plen = cfg->fc_dst_len;
+ u8 tos = cfg->fc_tos;
+ u8 slen = KEYLENGTH - plen;
struct tnode *l;
- struct leaf_info *li;
+ u32 key, mask;
- if (plen > 32)
+ if (plen > KEYLENGTH)
return -EINVAL;
key = ntohl(cfg->fc_dst);
if (key & ~mask)
return -EINVAL;
- key = key & mask;
l = fib_find_node(t, key);
-
if (!l)
return -ESRCH;
- li = find_leaf_info(l, plen);
-
- if (!li)
- return -ESRCH;
-
- fa_head = &li->falh;
- fa = fib_find_alias(fa_head, tos, 0);
+ fa = fib_find_alias(&l->leaf, slen, tos, 0);
if (!fa)
return -ESRCH;
hlist_for_each_entry_from(fa, fa_list) {
struct fib_info *fi = fa->fa_info;
- if (fa->fa_tos != tos)
+ if ((fa->fa_slen != slen) || (fa->fa_tos != tos))
break;
if ((!cfg->fc_type || fa->fa_type == cfg->fc_type) &&
rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id,
&cfg->fc_nlinfo, 0);
- hlist_del_rcu(&fa->fa_list);
+ fib_remove_alias(l, fa);
if (!plen)
tb->tb_num_default--;
- if (hlist_empty(fa_head)) {
- remove_leaf_info(l, li);
- free_leaf_info(li);
- }
-
- if (hlist_empty(&l->list))
+ if (hlist_empty(&l->leaf))
trie_leaf_remove(t, l);
if (fa->fa_state & FA_S_ACCESSED)
return 0;
}
-static int trie_flush_list(struct hlist_head *head)
+static int trie_flush_leaf(struct tnode *l)
{
struct hlist_node *tmp;
+ unsigned char slen = 0;
struct fib_alias *fa;
int found = 0;
- hlist_for_each_entry_safe(fa, tmp, head, fa_list) {
+ hlist_for_each_entry_safe(fa, tmp, &l->leaf, fa_list) {
struct fib_info *fi = fa->fa_info;
if (fi && (fi->fib_flags & RTNH_F_DEAD)) {
fib_release_info(fa->fa_info);
alias_free_mem_rcu(fa);
found++;
- }
- }
- return found;
-}
-
-static int trie_flush_leaf(struct tnode *l)
-{
- int found = 0;
- struct hlist_node *tmp;
- struct leaf_info *li;
- unsigned char slen = 0;
-
- hlist_for_each_entry_safe(li, tmp, &l->list, hlist) {
- found += trie_flush_list(&li->falh);
- if (hlist_empty(&li->falh)) {
- hlist_del_rcu(&li->hlist);
- free_leaf_info(li);
continue;
}
- slen = li->slen;
+ slen = fa->fa_slen;
}
l->slen = slen;
return found;
}
-/*
- * Scan for the next right leaf starting at node p->child[idx]
+/* Scan for the next right leaf starting at node p->child[idx]
* Since we have back pointer, no recursion necessary.
*/
static struct tnode *leaf_walk_rcu(struct tnode *p, struct tnode *c)
found += trie_flush_leaf(l);
if (ll) {
- if (hlist_empty(&ll->list))
+ if (hlist_empty(&ll->leaf))
trie_leaf_remove(t, ll);
else
leaf_pull_suffix(ll);
}
if (ll) {
- if (hlist_empty(&ll->list))
+ if (hlist_empty(&ll->leaf))
trie_leaf_remove(t, ll);
else
leaf_pull_suffix(ll);
kfree(tb);
}
-static int fn_trie_dump_fa(t_key key, struct hlist_head *fah,
- struct fib_table *tb,
- struct sk_buff *skb, struct netlink_callback *cb)
+static int fn_trie_dump_leaf(struct tnode *l, struct fib_table *tb,
+ struct sk_buff *skb, struct netlink_callback *cb)
{
- int i, s_i;
+ __be32 xkey = htonl(l->key);
struct fib_alias *fa;
- __be32 xkey = htonl(key);
+ int i, s_i;
- s_i = cb->args[5];
+ s_i = cb->args[4];
i = 0;
/* rcu_read_lock is hold by caller */
-
- hlist_for_each_entry_rcu(fa, fah, fa_list) {
+ hlist_for_each_entry_rcu(fa, &l->leaf, fa_list) {
if (i < s_i) {
i++;
continue;
KEYLENGTH - fa->fa_slen,
fa->fa_tos,
fa->fa_info, NLM_F_MULTI) < 0) {
- cb->args[5] = i;
- return -1;
- }
- i++;
- }
- cb->args[5] = i;
- return skb->len;
-}
-
-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;
- int i, s_i;
-
- s_i = cb->args[4];
- i = 0;
-
- /* rcu_read_lock is hold by caller */
- hlist_for_each_entry_rcu(li, &l->list, hlist) {
- if (i < s_i) {
- i++;
- continue;
- }
-
- if (i > s_i)
- cb->args[5] = 0;
-
- if (hlist_empty(&li->falh))
- continue;
-
- if (fn_trie_dump_fa(l->key, &li->falh, tb, skb, cb) < 0) {
cb->args[4] = i;
return -1;
}
0, SLAB_PANIC, NULL);
trie_leaf_kmem = kmem_cache_create("ip_fib_trie",
- max(sizeof(struct tnode),
- sizeof(struct leaf_info)),
+ sizeof(struct tnode),
0, SLAB_PANIC, NULL);
}
rcu_read_lock();
for (n = fib_trie_get_first(&iter, t); n; n = fib_trie_get_next(&iter)) {
if (IS_LEAF(n)) {
- struct leaf_info *li;
+ struct fib_alias *fa;
s->leaves++;
s->totdepth += iter.depth;
if (iter.depth > s->maxdepth)
s->maxdepth = iter.depth;
- hlist_for_each_entry_rcu(li, &n->list, hlist)
+ hlist_for_each_entry_rcu(fa, &n->leaf, fa_list)
++s->prefixes;
} else {
s->tnodes++;
bytes = sizeof(struct tnode) * stat->leaves;
seq_printf(seq, "\tPrefixes: %u\n", stat->prefixes);
- bytes += sizeof(struct leaf_info) * stat->prefixes;
+ bytes += sizeof(struct fib_alias) * stat->prefixes;
seq_printf(seq, "\tInternal nodes: %u\n\t", stat->tnodes);
bytes += sizeof(struct tnode) * stat->tnodes;
&prf, KEYLENGTH - n->pos - n->bits, n->bits,
n->full_children, n->empty_children);
} else {
- struct leaf_info *li;
__be32 val = htonl(n->key);
+ struct fib_alias *fa;
seq_indent(seq, iter->depth);
seq_printf(seq, " |-- %pI4\n", &val);
- hlist_for_each_entry_rcu(li, &n->list, hlist) {
- struct fib_alias *fa;
-
- hlist_for_each_entry_rcu(fa, &li->falh, fa_list) {
- char buf1[32], buf2[32];
-
- seq_indent(seq, iter->depth+1);
- seq_printf(seq, " /%zu %s %s",
- KEYLENGTH - fa->fa_slen,
- rtn_scope(buf1, sizeof(buf1),
- fa->fa_info->fib_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');
- }
+ hlist_for_each_entry_rcu(fa, &n->leaf, fa_list) {
+ char buf1[32], buf2[32];
+
+ seq_indent(seq, iter->depth + 1);
+ seq_printf(seq, " /%zu %s %s",
+ KEYLENGTH - fa->fa_slen,
+ rtn_scope(buf1, sizeof(buf1),
+ fa->fa_info->fib_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');
}
}
*/
static int fib_route_seq_show(struct seq_file *seq, void *v)
{
+ struct fib_alias *fa;
struct tnode *l = v;
- struct leaf_info *li;
__be32 prefix;
if (v == SEQ_START_TOKEN) {
prefix = htonl(l->key);
- hlist_for_each_entry_rcu(li, &l->list, hlist) {
- struct fib_alias *fa;
+ hlist_for_each_entry_rcu(fa, &l->leaf, fa_list) {
+ const struct fib_info *fi = fa->fa_info;
+ __be32 mask = inet_make_mask(KEYLENGTH - fa->fa_slen);
+ unsigned int flags = fib_flag_trans(fa->fa_type, mask, fi);
- hlist_for_each_entry_rcu(fa, &li->falh, fa_list) {
- const struct fib_info *fi = fa->fa_info;
- __be32 mask = inet_make_mask(KEYLENGTH - fa->fa_slen);
- unsigned int flags = fib_flag_trans(fa->fa_type, mask, fi);
-
- if (fa->fa_type == RTN_BROADCAST
- || fa->fa_type == RTN_MULTICAST)
- continue;
+ if ((fa->fa_type == RTN_BROADCAST) ||
+ (fa->fa_type == RTN_MULTICAST))
+ continue;
- seq_setwidth(seq, 127);
-
- 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",
- 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);
- else
- seq_printf(seq,
- "*\t%08X\t%08X\t%04X\t%d\t%u\t"
- "%d\t%08X\t%d\t%u\t%u",
- prefix, 0, flags, 0, 0, 0,
- mask, 0, 0, 0);
+ seq_setwidth(seq, 127);
+
+ 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",
+ 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);
+ else
+ seq_printf(seq,
+ "*\t%08X\t%08X\t%04X\t%d\t%u\t"
+ "%d\t%08X\t%d\t%u\t%u",
+ prefix, 0, flags, 0, 0, 0,
+ mask, 0, 0, 0);
- seq_pad(seq, '\n');
- }
+ seq_pad(seq, '\n');
}
return 0;
projects / openwrt / staging / blogic.git / commitdiff