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Date: Tue, 24 Sep 2013 13:46:41 +0200
From: Veaceslav Falico <vfalico@...hat.com>
To: netdev@...r.kernel.org
Cc: jiri@...nulli.us, Veaceslav Falico <vfalico@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Alexander Duyck <alexander.h.duyck@...el.com>,
Cong Wang <amwang@...hat.com>
Subject: [PATCH v4 net-next 01/27] net: use lists as arguments instead of bool upper
Currently we make use of bool upper when we want to specify if we want to
work with upper/lower list. It's, however, harder to read, debug and
occupies a lot more code.
Fix this by just passing the correct upper/lower_dev_list list_head pointer
instead of bool upper, and work internally with it.
CC: "David S. Miller" <davem@...emloft.net>
CC: Eric Dumazet <edumazet@...gle.com>
CC: Jiri Pirko <jiri@...nulli.us>
CC: Alexander Duyck <alexander.h.duyck@...el.com>
CC: Cong Wang <amwang@...hat.com>
Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
---
Notes:
RFC -> v4:
New patch.
net/core/dev.c | 54 ++++++++++++++++++++++--------------------------------
1 file changed, 22 insertions(+), 32 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 5c713f2..9be7937 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4385,12 +4385,9 @@ struct netdev_adjacent {
static struct netdev_adjacent *__netdev_find_adj(struct net_device *dev,
struct net_device *adj_dev,
- bool upper)
+ struct list_head *dev_list)
{
struct netdev_adjacent *adj;
- struct list_head *dev_list;
-
- dev_list = upper ? &dev->upper_dev_list : &dev->lower_dev_list;
list_for_each_entry(adj, dev_list, list) {
if (adj->dev == adj_dev)
@@ -4402,13 +4399,13 @@ static struct netdev_adjacent *__netdev_find_adj(struct net_device *dev,
static inline struct netdev_adjacent *__netdev_find_upper(struct net_device *dev,
struct net_device *udev)
{
- return __netdev_find_adj(dev, udev, true);
+ return __netdev_find_adj(dev, udev, &dev->upper_dev_list);
}
static inline struct netdev_adjacent *__netdev_find_lower(struct net_device *dev,
struct net_device *ldev)
{
- return __netdev_find_adj(dev, ldev, false);
+ return __netdev_find_adj(dev, ldev, &dev->lower_dev_list);
}
/**
@@ -4514,12 +4511,12 @@ EXPORT_SYMBOL(netdev_master_upper_dev_get_rcu);
static int __netdev_adjacent_dev_insert(struct net_device *dev,
struct net_device *adj_dev,
- bool neighbour, bool master,
- bool upper)
+ struct list_head *dev_list,
+ bool neighbour, bool master)
{
struct netdev_adjacent *adj;
- adj = __netdev_find_adj(dev, adj_dev, upper);
+ adj = __netdev_find_adj(dev, adj_dev, dev_list);
if (adj) {
BUG_ON(neighbour);
@@ -4538,19 +4535,14 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
dev_hold(adj_dev);
pr_debug("dev_hold for %s, because of %s link added from %s to %s\n",
- adj_dev->name, upper ? "upper" : "lower", dev->name,
- adj_dev->name);
+ adj_dev->name, dev_list == &dev->upper_dev_list ?
+ "upper" : "lower", dev->name, adj_dev->name);
- if (!upper) {
- list_add_tail_rcu(&adj->list, &dev->lower_dev_list);
- return 0;
- }
-
- /* Ensure that master upper link is always the first item in list. */
+ /* Ensure that master link is always the first item in list. */
if (master)
- list_add_rcu(&adj->list, &dev->upper_dev_list);
+ list_add_rcu(&adj->list, dev_list);
else
- list_add_tail_rcu(&adj->list, &dev->upper_dev_list);
+ list_add_tail_rcu(&adj->list, dev_list);
return 0;
}
@@ -4559,27 +4551,25 @@ static inline int __netdev_upper_dev_insert(struct net_device *dev,
struct net_device *udev,
bool master, bool neighbour)
{
- return __netdev_adjacent_dev_insert(dev, udev, neighbour, master,
- true);
+ return __netdev_adjacent_dev_insert(dev, udev, &dev->upper_dev_list,
+ neighbour, master);
}
static inline int __netdev_lower_dev_insert(struct net_device *dev,
struct net_device *ldev,
bool neighbour)
{
- return __netdev_adjacent_dev_insert(dev, ldev, neighbour, false,
- false);
+ return __netdev_adjacent_dev_insert(dev, ldev, &dev->lower_dev_list,
+ neighbour, false);
}
void __netdev_adjacent_dev_remove(struct net_device *dev,
- struct net_device *adj_dev, bool upper)
+ struct net_device *adj_dev,
+ struct list_head *dev_list)
{
struct netdev_adjacent *adj;
- if (upper)
- adj = __netdev_find_upper(dev, adj_dev);
- else
- adj = __netdev_find_lower(dev, adj_dev);
+ adj = __netdev_find_adj(dev, adj_dev, dev_list);
if (!adj)
BUG();
@@ -4591,8 +4581,8 @@ void __netdev_adjacent_dev_remove(struct net_device *dev,
list_del_rcu(&adj->list);
pr_debug("dev_put for %s, because of %s link removed from %s to %s\n",
- adj_dev->name, upper ? "upper" : "lower", dev->name,
- adj_dev->name);
+ adj_dev->name, dev_list == &dev->upper_dev_list ?
+ "upper" : "lower", dev->name, adj_dev->name);
dev_put(adj_dev);
kfree_rcu(adj, rcu);
}
@@ -4600,13 +4590,13 @@ void __netdev_adjacent_dev_remove(struct net_device *dev,
static inline void __netdev_upper_dev_remove(struct net_device *dev,
struct net_device *udev)
{
- return __netdev_adjacent_dev_remove(dev, udev, true);
+ return __netdev_adjacent_dev_remove(dev, udev, &dev->upper_dev_list);
}
static inline void __netdev_lower_dev_remove(struct net_device *dev,
struct net_device *ldev)
{
- return __netdev_adjacent_dev_remove(dev, ldev, false);
+ return __netdev_adjacent_dev_remove(dev, ldev, &dev->lower_dev_list);
}
int __netdev_adjacent_dev_insert_link(struct net_device *dev,
--
1.8.4
--
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