summaryrefslogtreecommitdiffstats
path: root/net/ipv4/fib_hash.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/fib_hash.c')
-rw-r--r--net/ipv4/fib_hash.c126
1 files changed, 61 insertions, 65 deletions
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index 0dfee27cfbcd..a15b2f1b2721 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -52,6 +52,7 @@ struct fib_node {
struct hlist_node fn_hash;
struct list_head fn_alias;
__be32 fn_key;
+ struct fib_alias fn_embedded_alias;
};
struct fn_zone {
@@ -102,10 +103,10 @@ static struct hlist_head *fz_hash_alloc(int divisor)
unsigned long size = divisor * sizeof(struct hlist_head);
if (size <= PAGE_SIZE) {
- return kmalloc(size, GFP_KERNEL);
+ return kzalloc(size, GFP_KERNEL);
} else {
return (struct hlist_head *)
- __get_free_pages(GFP_KERNEL, get_order(size));
+ __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(size));
}
}
@@ -168,14 +169,13 @@ static void fn_rehash_zone(struct fn_zone *fz)
new_hashmask = (new_divisor - 1);
#if RT_CACHE_DEBUG >= 2
- printk("fn_rehash_zone: hash for zone %d grows from %d\n", fz->fz_order, old_divisor);
+ printk(KERN_DEBUG "fn_rehash_zone: hash for zone %d grows from %d\n",
+ fz->fz_order, old_divisor);
#endif
ht = fz_hash_alloc(new_divisor);
if (ht) {
- memset(ht, 0, new_divisor * sizeof(struct hlist_head));
-
write_lock_bh(&fib_hash_lock);
old_ht = fz->fz_hash;
fz->fz_hash = ht;
@@ -194,10 +194,13 @@ static inline void fn_free_node(struct fib_node * f)
kmem_cache_free(fn_hash_kmem, f);
}
-static inline void fn_free_alias(struct fib_alias *fa)
+static inline void fn_free_alias(struct fib_alias *fa, struct fib_node *f)
{
fib_release_info(fa->fa_info);
- kmem_cache_free(fn_alias_kmem, fa);
+ if (fa == &f->fn_embedded_alias)
+ fa->fa_info = NULL;
+ else
+ kmem_cache_free(fn_alias_kmem, fa);
}
static struct fn_zone *
@@ -219,7 +222,6 @@ fn_new_zone(struct fn_hash *table, int z)
kfree(fz);
return NULL;
}
- memset(fz->fz_hash, 0, fz->fz_divisor * sizeof(struct hlist_head *));
fz->fz_order = z;
fz->fz_mask = inet_make_mask(z);
@@ -275,8 +277,6 @@ out:
return err;
}
-static int fn_hash_last_dflt=-1;
-
static void
fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
{
@@ -317,12 +317,9 @@ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
if (next_fi != res->fi)
break;
} else if (!fib_detect_death(fi, order, &last_resort,
- &last_idx, &fn_hash_last_dflt)) {
- if (res->fi)
- fib_info_put(res->fi);
- res->fi = fi;
- atomic_inc(&fi->fib_clntref);
- fn_hash_last_dflt = order;
+ &last_idx, tb->tb_default)) {
+ fib_result_assign(res, fi);
+ tb->tb_default = order;
goto out;
}
fi = next_fi;
@@ -331,27 +328,20 @@ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
}
if (order <= 0 || fi == NULL) {
- fn_hash_last_dflt = -1;
+ tb->tb_default = -1;
goto out;
}
- if (!fib_detect_death(fi, order, &last_resort, &last_idx, &fn_hash_last_dflt)) {
- if (res->fi)
- fib_info_put(res->fi);
- res->fi = fi;
- atomic_inc(&fi->fib_clntref);
- fn_hash_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);
- }
- fn_hash_last_dflt = last_idx;
+ if (last_idx >= 0)
+ fib_result_assign(res, last_resort);
+ tb->tb_default = last_idx;
out:
read_unlock(&fib_hash_lock);
}
@@ -490,15 +480,12 @@ static int fn_hash_insert(struct fib_table *tb, struct fib_config *cfg)
goto out;
err = -ENOBUFS;
- new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
- if (new_fa == NULL)
- goto out;
new_f = NULL;
if (!f) {
- new_f = kmem_cache_alloc(fn_hash_kmem, GFP_KERNEL);
+ new_f = kmem_cache_zalloc(fn_hash_kmem, GFP_KERNEL);
if (new_f == NULL)
- goto out_free_new_fa;
+ goto out;
INIT_HLIST_NODE(&new_f->fn_hash);
INIT_LIST_HEAD(&new_f->fn_alias);
@@ -506,6 +493,12 @@ static int fn_hash_insert(struct fib_table *tb, struct fib_config *cfg)
f = new_f;
}
+ new_fa = &f->fn_embedded_alias;
+ if (new_fa->fa_info != NULL) {
+ new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
+ if (new_fa == NULL)
+ goto out_free_new_f;
+ }
new_fa->fa_info = fi;
new_fa->fa_tos = tos;
new_fa->fa_type = cfg->fc_type;
@@ -532,8 +525,8 @@ static int fn_hash_insert(struct fib_table *tb, struct fib_config *cfg)
&cfg->fc_nlinfo, 0);
return 0;
-out_free_new_fa:
- kmem_cache_free(fn_alias_kmem, new_fa);
+out_free_new_f:
+ kmem_cache_free(fn_hash_kmem, new_f);
out:
fib_release_info(fi);
return err;
@@ -609,7 +602,7 @@ static int fn_hash_delete(struct fib_table *tb, struct fib_config *cfg)
if (fa->fa_state & FA_S_ACCESSED)
rt_cache_flush(-1);
- fn_free_alias(fa);
+ fn_free_alias(fa, f);
if (kill_fn) {
fn_free_node(f);
fz->fz_nent--;
@@ -645,7 +638,7 @@ static int fn_flush_list(struct fn_zone *fz, int idx)
fib_hash_genid++;
write_unlock_bh(&fib_hash_lock);
- fn_free_alias(fa);
+ fn_free_alias(fa, f);
found++;
}
}
@@ -761,25 +754,19 @@ static int fn_hash_dump(struct fib_table *tb, struct sk_buff *skb, struct netlin
return skb->len;
}
-#ifdef CONFIG_IP_MULTIPLE_TABLES
-struct fib_table * fib_hash_init(u32 id)
-#else
-struct fib_table * __init fib_hash_init(u32 id)
-#endif
+void __init fib_hash_init(void)
{
- struct fib_table *tb;
+ fn_hash_kmem = kmem_cache_create("ip_fib_hash", sizeof(struct fib_node),
+ 0, SLAB_PANIC, NULL);
- if (fn_hash_kmem == NULL)
- fn_hash_kmem = kmem_cache_create("ip_fib_hash",
- sizeof(struct fib_node),
- 0, SLAB_HWCACHE_ALIGN,
- NULL);
+ fn_alias_kmem = kmem_cache_create("ip_fib_alias", sizeof(struct fib_alias),
+ 0, SLAB_PANIC, NULL);
- if (fn_alias_kmem == NULL)
- fn_alias_kmem = kmem_cache_create("ip_fib_alias",
- sizeof(struct fib_alias),
- 0, SLAB_HWCACHE_ALIGN,
- NULL);
+}
+
+struct fib_table *fib_hash_table(u32 id)
+{
+ struct fib_table *tb;
tb = kmalloc(sizeof(struct fib_table) + sizeof(struct fn_hash),
GFP_KERNEL);
@@ -787,6 +774,7 @@ struct fib_table * __init fib_hash_init(u32 id)
return NULL;
tb->tb_id = id;
+ tb->tb_default = -1;
tb->tb_lookup = fn_hash_lookup;
tb->tb_insert = fn_hash_insert;
tb->tb_delete = fn_hash_delete;
@@ -801,6 +789,7 @@ struct fib_table * __init fib_hash_init(u32 id)
#ifdef CONFIG_PROC_FS
struct fib_iter_state {
+ struct seq_net_private p;
struct fn_zone *zone;
int bucket;
struct hlist_head *hash_head;
@@ -814,7 +803,11 @@ struct fib_iter_state {
static struct fib_alias *fib_get_first(struct seq_file *seq)
{
struct fib_iter_state *iter = seq->private;
- struct fn_hash *table = (struct fn_hash *) ip_fib_main_table->tb_data;
+ struct fib_table *main_table;
+ struct fn_hash *table;
+
+ main_table = fib_get_table(iter->p.net, RT_TABLE_MAIN);
+ table = (struct fn_hash *)main_table->tb_data;
iter->bucket = 0;
iter->hash_head = NULL;
@@ -949,11 +942,13 @@ static struct fib_alias *fib_get_idx(struct seq_file *seq, loff_t pos)
}
static void *fib_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(fib_hash_lock)
{
+ struct fib_iter_state *iter = seq->private;
void *v = NULL;
read_lock(&fib_hash_lock);
- if (ip_fib_main_table)
+ if (fib_get_table(iter->p.net, RT_TABLE_MAIN))
v = *pos ? fib_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
return v;
}
@@ -965,6 +960,7 @@ static void *fib_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
static void fib_seq_stop(struct seq_file *seq, void *v)
+ __releases(fib_hash_lock)
{
read_unlock(&fib_hash_lock);
}
@@ -1040,8 +1036,8 @@ static const struct seq_operations fib_seq_ops = {
static int fib_seq_open(struct inode *inode, struct file *file)
{
- return seq_open_private(file, &fib_seq_ops,
- sizeof(struct fib_iter_state));
+ return seq_open_net(inode, file, &fib_seq_ops,
+ sizeof(struct fib_iter_state));
}
static const struct file_operations fib_seq_fops = {
@@ -1049,18 +1045,18 @@ static const struct file_operations fib_seq_fops = {
.open = fib_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release_private,
+ .release = seq_release_net,
};
-int __init fib_proc_init(void)
+int __net_init fib_proc_init(struct net *net)
{
- if (!proc_net_fops_create(&init_net, "route", S_IRUGO, &fib_seq_fops))
+ if (!proc_net_fops_create(net, "route", S_IRUGO, &fib_seq_fops))
return -ENOMEM;
return 0;
}
-void __init fib_proc_exit(void)
+void __net_exit fib_proc_exit(struct net *net)
{
- proc_net_remove(&init_net, "route");
+ proc_net_remove(net, "route");
}
#endif /* CONFIG_PROC_FS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 19:22:07 +0100