[PATCH net-next 0/2] bonding: clean rlb vlan use

[PATCH net-next 0/2] bonding: clean rlb vlan use

[Veaceslav Falico]

Finish the vlan cleanup, only rlb left.

Remove the bond_vlan_used() function, it's useless anyway, and
rlb_client_info->tag, cause we can use only ->vlan_id.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>

---
 drivers/net/bonding/bond_alb.c | 12 +++++-------
 drivers/net/bonding/bond_alb.h |  1 -
 drivers/net/bonding/bonding.h  | 18 ------------------
 3 files changed, 5 insertions(+), 26 deletions(-)

[PATCH net-next 1/2] bonding: remove bond_vlan_used()

[Veaceslav Falico]

We're using it currently to verify if we have vlans before getting the tag
from the skb we're about to send. It's useless because the vlan_get_tag()
verifies if the skb has the tag (and returns an error if not), and we can
receive tagged skbs only if we *already* have vlans.

Plus, the current RCUed implementation is kind of useless anyway - the we
can remove the last vlan in the moment we return from the function.

So remove the only usage of it and the whole function.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
---
 drivers/net/bonding/bond_alb.c |  6 ++----
 drivers/net/bonding/bonding.h  | 18 ------------------
 2 files changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 0182352..27b03fa 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -694,10 +694,8 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 			client_info->ntt = 0;
 		}
 
-		if (bond_vlan_used(bond)) {
-			if (!vlan_get_tag(skb, &client_info->vlan_id))
-				client_info->tag = 1;
-		}
+		if (!vlan_get_tag(skb, &client_info->vlan_id))
+			client_info->tag = 1;
 
 		if (!client_info->assigned) {
 			u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 4abc925..f7ab161 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -261,24 +261,6 @@ struct bonding {
 #endif /* CONFIG_DEBUG_FS */
 };
 
-/* if we hold rtnl_lock() - call vlan_uses_dev() */
-static inline bool bond_vlan_used(struct bonding *bond)
-{
-	struct net_device *upper;
-	struct list_head *iter;
-
-	rcu_read_lock();
-	netdev_for_each_upper_dev_rcu(bond->dev, upper, iter) {
-		if (upper->priv_flags & IFF_802_1Q_VLAN) {
-			rcu_read_unlock();
-			return true;
-		}
-	}
-	rcu_read_unlock();
-
-	return false;
-}
-
 #define bond_slave_get_rcu(dev) \
 	((struct slave *) rcu_dereference(dev->rx_handler_data))
 
-- 
1.8.4

[PATCH net-next 2/2] bonding: use rlb_client_info->vlan_id instead of ->tag

[Veaceslav Falico]

Store VID in ->vlan_id (if any), and remove the useless ->tag.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
---
 drivers/net/bonding/bond_alb.c | 8 ++++----
 drivers/net/bonding/bond_alb.h | 1 -
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 27b03fa..91f179d 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -512,7 +512,7 @@ static void rlb_update_client(struct rlb_client_info *client_info)
 
 		skb->dev = client_info->slave->dev;
 
-		if (client_info->tag) {
+		if (client_info->vlan_id) {
 			skb = vlan_put_tag(skb, htons(ETH_P_8021Q), client_info->vlan_id);
 			if (!skb) {
 				pr_err("%s: Error: failed to insert VLAN tag\n",
@@ -695,7 +695,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 		}
 
 		if (!vlan_get_tag(skb, &client_info->vlan_id))
-			client_info->tag = 1;
+			client_info->vlan_id = 0;
 
 		if (!client_info->assigned) {
 			u32 prev_tbl_head = bond_info->rx_hashtbl_used_head;
@@ -801,7 +801,7 @@ static void rlb_init_table_entry_dst(struct rlb_client_info *entry)
 	entry->used_prev = RLB_NULL_INDEX;
 	entry->assigned = 0;
 	entry->slave = NULL;
-	entry->tag = 0;
+	entry->vlan_id = 0;
 }
 static void rlb_init_table_entry_src(struct rlb_client_info *entry)
 {
@@ -958,7 +958,7 @@ static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
 		struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]);
 		u32 next_index = bond_info->rx_hashtbl[curr_index].used_next;
 
-		if (curr->tag && (curr->vlan_id == vlan_id))
+		if (curr->vlan_id == vlan_id)
 			rlb_delete_table_entry(bond, curr_index);
 
 		curr_index = next_index;
diff --git a/drivers/net/bonding/bond_alb.h b/drivers/net/bonding/bond_alb.h
index e02c9c5..28d8e4c 100644
--- a/drivers/net/bonding/bond_alb.h
+++ b/drivers/net/bonding/bond_alb.h
@@ -125,7 +125,6 @@ struct rlb_client_info {
 	u8  assigned;		/* checking whether this entry is assigned */
 	u8  ntt;		/* flag - need to transmit client info */
 	struct slave *slave;	/* the slave assigned to this client */
-	u8 tag;			/* flag - need to tag skb */
 	unsigned short vlan_id;	/* VLAN tag associated with IP address */
 };
 
-- 
1.8.4

Re: [PATCH net-next 0/2] bonding: clean rlb vlan use

[David Miller]

From: Veaceslav Falico <vfalico@redhat.com>
Date: Thu, 29 Aug 2013 23:38:55 +0200

> Finish the vlan cleanup, only rlb left.
> 
> Remove the bond_vlan_used() function, it's useless anyway, and
> rlb_client_info->tag, cause we can use only ->vlan_id.
> 
> CC: Jay Vosburgh <fubar@us.ibm.com>
> CC: Andy Gospodarek <andy@greyhouse.net>
> Signed-off-by: Veaceslav Falico <vfalico@redhat.com>

Applied, thanks.