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-rw-r--r--net/core/dev.c59
1 files changed, 13 insertions, 46 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 723a4065a00e..c25d453b2803 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -73,7 +73,6 @@
*/
#include <asm/uaccess.h>
-#include <asm/system.h>
#include <linux/bitops.h>
#include <linux/capability.h>
#include <linux/cpu.h>
@@ -4029,54 +4028,41 @@ static int dev_ifconf(struct net *net, char __user *arg)
#ifdef CONFIG_PROC_FS
-#define BUCKET_SPACE (32 - NETDEV_HASHBITS)
-
-struct dev_iter_state {
- struct seq_net_private p;
- unsigned int pos; /* bucket << BUCKET_SPACE + offset */
-};
+#define BUCKET_SPACE (32 - NETDEV_HASHBITS - 1)
#define get_bucket(x) ((x) >> BUCKET_SPACE)
#define get_offset(x) ((x) & ((1 << BUCKET_SPACE) - 1))
#define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
-static inline struct net_device *dev_from_same_bucket(struct seq_file *seq)
+static inline struct net_device *dev_from_same_bucket(struct seq_file *seq, loff_t *pos)
{
- struct dev_iter_state *state = seq->private;
struct net *net = seq_file_net(seq);
struct net_device *dev;
struct hlist_node *p;
struct hlist_head *h;
- unsigned int count, bucket, offset;
+ unsigned int count = 0, offset = get_offset(*pos);
- bucket = get_bucket(state->pos);
- offset = get_offset(state->pos);
- h = &net->dev_name_head[bucket];
- count = 0;
+ h = &net->dev_name_head[get_bucket(*pos)];
hlist_for_each_entry_rcu(dev, p, h, name_hlist) {
- if (count++ == offset) {
- state->pos = set_bucket_offset(bucket, count);
+ if (++count == offset)
return dev;
- }
}
return NULL;
}
-static inline struct net_device *dev_from_new_bucket(struct seq_file *seq)
+static inline struct net_device *dev_from_bucket(struct seq_file *seq, loff_t *pos)
{
- struct dev_iter_state *state = seq->private;
struct net_device *dev;
unsigned int bucket;
- bucket = get_bucket(state->pos);
do {
- dev = dev_from_same_bucket(seq);
+ dev = dev_from_same_bucket(seq, pos);
if (dev)
return dev;
- bucket++;
- state->pos = set_bucket_offset(bucket, 0);
+ bucket = get_bucket(*pos) + 1;
+ *pos = set_bucket_offset(bucket, 1);
} while (bucket < NETDEV_HASHENTRIES);
return NULL;
@@ -4089,33 +4075,20 @@ static inline struct net_device *dev_from_new_bucket(struct seq_file *seq)
void *dev_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(RCU)
{
- struct dev_iter_state *state = seq->private;
-
rcu_read_lock();
if (!*pos)
return SEQ_START_TOKEN;
- /* check for end of the hash */
- if (state->pos == 0 && *pos > 1)
+ if (get_bucket(*pos) >= NETDEV_HASHENTRIES)
return NULL;
- return dev_from_new_bucket(seq);
+ return dev_from_bucket(seq, pos);
}
void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- struct net_device *dev;
-
++*pos;
-
- if (v == SEQ_START_TOKEN)
- return dev_from_new_bucket(seq);
-
- dev = dev_from_same_bucket(seq);
- if (dev)
- return dev;
-
- return dev_from_new_bucket(seq);
+ return dev_from_bucket(seq, pos);
}
void dev_seq_stop(struct seq_file *seq, void *v)
@@ -4214,13 +4187,7 @@ static const struct seq_operations dev_seq_ops = {
static int dev_seq_open(struct inode *inode, struct file *file)
{
return seq_open_net(inode, file, &dev_seq_ops,
- sizeof(struct dev_iter_state));
-}
-
-int dev_seq_open_ops(struct inode *inode, struct file *file,
- const struct seq_operations *ops)
-{
- return seq_open_net(inode, file, ops, sizeof(struct dev_iter_state));
+ sizeof(struct seq_net_private));
}
static const struct file_operations dev_seq_fops = {