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-rw-r--r--net/core/dev.c61
1 files changed, 27 insertions, 34 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 0879f52115e..c9c593e1ba6 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -150,8 +150,11 @@
* 86DD IPv6
*/
+#define PTYPE_HASH_SIZE (16)
+#define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
+
static DEFINE_SPINLOCK(ptype_lock);
-static struct list_head ptype_base[16] __read_mostly; /* 16 way hashed list */
+static struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
static struct list_head ptype_all __read_mostly; /* Taps */
#ifdef CONFIG_NET_DMA
@@ -362,7 +365,7 @@ void dev_add_pack(struct packet_type *pt)
if (pt->type == htons(ETH_P_ALL))
list_add_rcu(&pt->list, &ptype_all);
else {
- hash = ntohs(pt->type) & 15;
+ hash = ntohs(pt->type) & PTYPE_HASH_MASK;
list_add_rcu(&pt->list, &ptype_base[hash]);
}
spin_unlock_bh(&ptype_lock);
@@ -391,7 +394,7 @@ void __dev_remove_pack(struct packet_type *pt)
if (pt->type == htons(ETH_P_ALL))
head = &ptype_all;
else
- head = &ptype_base[ntohs(pt->type) & 15];
+ head = &ptype_base[ntohs(pt->type) & PTYPE_HASH_MASK];
list_for_each_entry(pt1, head, list) {
if (pt == pt1) {
@@ -672,7 +675,7 @@ struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *h
ASSERT_RTNL();
- for_each_netdev(&init_net, dev)
+ for_each_netdev(net, dev)
if (dev->type == type &&
!memcmp(dev->dev_addr, ha, dev->addr_len))
return dev;
@@ -1420,7 +1423,8 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
}
rcu_read_lock();
- list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & 15], list) {
+ list_for_each_entry_rcu(ptype,
+ &ptype_base[ntohs(type) & PTYPE_HASH_MASK], list) {
if (ptype->type == type && !ptype->dev && ptype->gso_segment) {
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
err = ptype->gso_send_check(skb);
@@ -2077,7 +2081,8 @@ ncls:
goto out;
type = skb->protocol;
- list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type)&15], list) {
+ list_for_each_entry_rcu(ptype,
+ &ptype_base[ntohs(type) & PTYPE_HASH_MASK], list) {
if (ptype->type == type &&
(!ptype->dev || ptype->dev == skb->dev)) {
if (pt_prev)
@@ -2363,8 +2368,9 @@ static int dev_ifconf(struct net *net, char __user *arg)
* in detail.
*/
void *dev_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(dev_base_lock)
{
- struct net *net = seq->private;
+ struct net *net = seq_file_net(seq);
loff_t off;
struct net_device *dev;
@@ -2382,13 +2388,14 @@ void *dev_seq_start(struct seq_file *seq, loff_t *pos)
void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct net *net = seq->private;
+ struct net *net = seq_file_net(seq);
++*pos;
return v == SEQ_START_TOKEN ?
first_net_device(net) : next_net_device((struct net_device *)v);
}
void dev_seq_stop(struct seq_file *seq, void *v)
+ __releases(dev_base_lock)
{
read_unlock(&dev_base_lock);
}
@@ -2481,26 +2488,8 @@ static const struct seq_operations dev_seq_ops = {
static int dev_seq_open(struct inode *inode, struct file *file)
{
- struct seq_file *seq;
- int res;
- res = seq_open(file, &dev_seq_ops);
- if (!res) {
- seq = file->private_data;
- seq->private = get_proc_net(inode);
- if (!seq->private) {
- seq_release(inode, file);
- res = -ENXIO;
- }
- }
- return res;
-}
-
-static int dev_seq_release(struct inode *inode, struct file *file)
-{
- struct seq_file *seq = file->private_data;
- struct net *net = seq->private;
- put_net(net);
- return seq_release(inode, file);
+ return seq_open_net(inode, file, &dev_seq_ops,
+ sizeof(struct seq_net_private));
}
static const struct file_operations dev_seq_fops = {
@@ -2508,7 +2497,7 @@ static const struct file_operations dev_seq_fops = {
.open = dev_seq_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = dev_seq_release,
+ .release = seq_release_net,
};
static const struct seq_operations softnet_seq_ops = {
@@ -2543,7 +2532,7 @@ static void *ptype_get_idx(loff_t pos)
++i;
}
- for (t = 0; t < 16; t++) {
+ for (t = 0; t < PTYPE_HASH_SIZE; t++) {
list_for_each_entry_rcu(pt, &ptype_base[t], list) {
if (i == pos)
return pt;
@@ -2554,6 +2543,7 @@ static void *ptype_get_idx(loff_t pos)
}
static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(RCU)
{
rcu_read_lock();
return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
@@ -2577,10 +2567,10 @@ static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
hash = 0;
nxt = ptype_base[0].next;
} else
- hash = ntohs(pt->type) & 15;
+ hash = ntohs(pt->type) & PTYPE_HASH_MASK;
while (nxt == &ptype_base[hash]) {
- if (++hash >= 16)
+ if (++hash >= PTYPE_HASH_SIZE)
return NULL;
nxt = ptype_base[hash].next;
}
@@ -2589,6 +2579,7 @@ found:
}
static void ptype_seq_stop(struct seq_file *seq, void *v)
+ __releases(RCU)
{
rcu_read_unlock();
}
@@ -3505,7 +3496,7 @@ static int dev_new_index(struct net *net)
/* Delayed registration/unregisteration */
static DEFINE_SPINLOCK(net_todo_list_lock);
-static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list);
+static LIST_HEAD(net_todo_list);
static void net_set_todo(struct net_device *dev)
{
@@ -3984,6 +3975,8 @@ void synchronize_net(void)
void unregister_netdevice(struct net_device *dev)
{
+ ASSERT_RTNL();
+
rollback_registered(dev);
/* Finish processing unregister after unlock */
net_set_todo(dev);
@@ -4416,7 +4409,7 @@ static int __init net_dev_init(void)
goto out;
INIT_LIST_HEAD(&ptype_all);
- for (i = 0; i < 16; i++)
+ for (i = 0; i < PTYPE_HASH_SIZE; i++)
INIT_LIST_HEAD(&ptype_base[i]);
if (register_pernet_subsys(&netdev_net_ops))
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 22:02:18 +0000