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Commit 8d77e99e authored by Shmulik Hen's avatar Shmulik Hen Committed by Jeff Garzik
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[PATCH] bonding cleanup 2.6 - Consolidate error handling in all xmit functions

parent e2ed8a6c
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Showing with 91 additions and 106 deletions
drivers/net/bonding/bond_3ad.c
View file @ 8d77e99e
......@@ -2360,32 +2360,18 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
int i;
struct ad_info ad_info;
if (!IS_UP(dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
if (bond == NULL) {
printk(KERN_ERR DRV_NAME ": Error: bond is NULL on device %s\n", dev->name);
dev_kfree_skb(skb);
return 0;
}
/* make sure that the slaves list will
* not change during tx
*/
read_lock(&bond->lock);
/* check if bond is empty */
if (bond->slave_cnt == 0) {
printk(KERN_DEBUG DRV_NAME ": Error: bond is empty\n");
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
if (!BOND_IS_OK(bond)) {
goto free_out;
}
if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
printk(KERN_DEBUG "ERROR: bond_3ad_get_active_agg_info failed\n");
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
goto free_out;
}
slaves_in_agg = ad_info.ports;
......@@ -2394,9 +2380,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
if (slaves_in_agg == 0) {
/*the aggregator is empty*/
printk(KERN_DEBUG "ERROR: active aggregator is empty\n");
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
goto free_out;
}
slave_agg_no = (data->h_dest[5]^bond->dev->dev_addr[5]) % slaves_in_agg;
......@@ -2414,9 +2398,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
if (slave_agg_no >= 0) {
printk(KERN_ERR DRV_NAME ": Error: Couldn't find a slave to tx on for aggregator ID %d\n", agg_id);
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
goto free_out;
}
start_at = slave;
......@@ -2434,15 +2416,17 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
skb->dev = slave->dev;
skb->priority = 1;
dev_queue_xmit(skb);
read_unlock(&bond->lock);
return 0;
}
}
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
out:
read_unlock(&bond->lock);
return 0;
free_out:
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
goto out;
}
int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype)
......
drivers/net/bonding/bond_alb.c
View file @ 8d77e99e
......@@ -1158,25 +1158,16 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
u32 hash_index = 0;
u8 *hash_start = NULL;
if (!IS_UP(bond_dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
/* make sure that the curr_active_slave and the slaves list do
* not change during tx
*/
read_lock(&bond->lock);
read_lock(&bond->curr_slave_lock);
if (bond->slave_cnt == 0) {
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
if (!BOND_IS_OK(bond)) {
goto free_out;
}
read_lock(&bond->curr_slave_lock);
switch (ntohs(skb->protocol)) {
case ETH_P_IP:
if ((memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) ||
......@@ -1256,12 +1247,17 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
if (tx_slave) {
tlb_clear_slave(bond, tx_slave, 0);
}
dev_kfree_skb(skb);
goto free_out;
}
out:
read_unlock(&bond->curr_slave_lock);
read_unlock(&bond->lock);
return 0;
free_out:
dev_kfree_skb(skb);
goto out;
}
void bond_alb_monitor(struct bonding *bond)
......
drivers/net/bonding/bond_main.c
View file @ 8d77e99e
......@@ -2913,22 +2913,18 @@ static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
struct net_device *tx_dev = NULL;
int i;
if (!IS_UP(bond_dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
read_lock(&bond->lock);
if (!BOND_IS_OK(bond)) {
goto free_out;
}
read_lock(&bond->curr_slave_lock);
start_at = bond->curr_active_slave;
read_unlock(&bond->curr_slave_lock);
if (!start_at) { /* we're at the root, get the first slave */
/* no suitable interface, frame not sent */
read_unlock(&bond->lock);
dev_kfree_skb(skb);
return 0;
if (!start_at) {
goto free_out;
}
bond_for_each_slave_from(bond, slave, i, start_at) {
......@@ -2957,12 +2953,18 @@ static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
skb->priority = 1;
dev_queue_xmit(skb);
} else {
dev_kfree_skb(skb);
goto free_out;
}
out:
/* frame sent to all suitable interfaces */
read_unlock(&bond->lock);
return 0;
free_out:
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
goto out;
}
static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
......@@ -2971,22 +2973,18 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev
struct slave *slave, *start_at;
int i;
if (!IS_UP(bond_dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
read_lock(&bond->lock);
if (!BOND_IS_OK(bond)) {
goto free_out;
}
read_lock(&bond->curr_slave_lock);
slave = start_at = bond->curr_active_slave;
read_unlock(&bond->curr_slave_lock);
if (!slave) { /* we're at the root, get the first slave */
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
if (!slave) {
goto free_out;
}
bond_for_each_slave_from(bond, slave, i, start_at) {
......@@ -3002,15 +3000,18 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev
bond->curr_active_slave = slave->next;
write_unlock(&bond->curr_slave_lock);
read_unlock(&bond->lock);
return 0;
goto out;
}
}
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
out:
read_unlock(&bond->lock);
return 0;
free_out:
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
goto out;
}
/*
......@@ -3026,18 +3027,10 @@ static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
int slave_no;
int i;
if (!IS_UP(bond_dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
read_lock(&bond->lock);
if (bond->slave_cnt == 0) {
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
if (!BOND_IS_OK(bond)) {
goto free_out;
}
slave_no = (data->h_dest[5]^bond_dev->dev_addr[5]) % bond->slave_cnt;
......@@ -3060,15 +3053,18 @@ static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
skb->priority = 1;
dev_queue_xmit(skb);
read_unlock(&bond->lock);
return 0;
goto out;
}
}
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
out:
read_unlock(&bond->lock);
return 0;
free_out:
/* no suitable interface, frame not sent */
dev_kfree_skb(skb);
goto out;
}
/*
......@@ -3079,11 +3075,6 @@ static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_d
{
struct bonding *bond = (struct bonding *)bond_dev->priv;
if (!IS_UP(bond_dev)) { /* bond down */
dev_kfree_skb(skb);
return 0;
}
/* if we are sending arp packets, try to at least
identify our own ip address */
if (arp_interval && !my_ip &&
......@@ -3096,24 +3087,29 @@ static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_d
}
read_lock(&bond->lock);
read_lock(&bond->curr_slave_lock);
if (!BOND_IS_OK(bond)) {
goto free_out;
}
if (bond->curr_active_slave) { /* one usable interface */
skb->dev = bond->curr_active_slave->dev;
read_unlock(&bond->curr_slave_lock);
skb->priority = 1;
dev_queue_xmit(skb);
read_unlock(&bond->lock);
return 0;
goto out;
} else {
read_unlock(&bond->curr_slave_lock);
goto free_out;
}
out:
read_unlock(&bond->curr_slave_lock);
read_unlock(&bond->lock);
return 0;
free_out:
/* no suitable interface, frame not sent */
dprintk("There was no suitable interface, so we don't transmit\n");
dev_kfree_skb(skb);
read_unlock(&bond->lock);
return 0;
goto out;
}
static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
......
drivers/net/bonding/bonding.h
View file @ 8d77e99e
......@@ -45,18 +45,27 @@
#define dprintk(fmt, args...)
#endif /* BONDING_DEBUG */
#define IS_UP(dev) ((((dev)->flags & (IFF_UP)) == (IFF_UP)) && \
(netif_running(dev) && netif_carrier_ok(dev)))
/* Checks whether the dev is ready for transmit. We do not check netif_running
* since a device can be stopped by the driver for short periods of time for
* maintainance. dev_queue_xmit() handles this by queing the packet until the
* the dev is running again. Keeping packets ordering requires sticking the
* same dev as much as possible
#define IS_UP(dev) \
((((dev)->flags & IFF_UP) == IFF_UP) && \
netif_running(dev) && \
netif_carrier_ok(dev))
/*
* Checks whether bond is ready for transmit.
*
* Caller must hold bond->lock
*/
#define BOND_IS_OK(bond) \
(((bond)->dev->flags & IFF_UP) && \
netif_running((bond)->dev) && \
((bond)->slave_cnt > 0))
/*
* Checks whether slave is ready for transmit.
*/
#define SLAVE_IS_OK(slave) \
((((slave)->dev->flags & (IFF_UP)) == (IFF_UP)) && \
netif_carrier_ok((slave)->dev) && \
(((slave)->dev->flags & IFF_UP) && \
netif_running((slave)->dev) && \
((slave)->link == BOND_LINK_UP) && \
((slave)->state == BOND_STATE_ACTIVE))
......
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