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Date: Wed, 31 Jul 2013 17:12:29 +0200
From: Nikolay Aleksandrov <nikolay@...hat.com>
To: netdev@...r.kernel.org
Cc: andy@...yhouse.net, davem@...emloft.net, fubar@...ibm.com
Subject: [PATCH net-next 1/5] bonding: convert to list API and replace bond's custom list
This patch aims to remove struct bonding's first_slave and struct
slave's next and prev pointers, and replace them with the standard Linux
list API. There's need only for 1 custom macro - bond_for_each_slave_from.
Also a few small style fixes, changing longest -> shortest line in local
variable declarations, leaving an empty line before return and removing
unnecessary brackets.
This is the first step to gradual RCU conversion.
Signed-off-by: Nikolay Aleksandrov <nikolay@...hat.com>
---
drivers/net/bonding/bond_3ad.c | 34 +++++---
drivers/net/bonding/bond_alb.c | 35 ++++----
drivers/net/bonding/bond_main.c | 166 +++++++++++++++-----------------------
drivers/net/bonding/bond_procfs.c | 13 +--
drivers/net/bonding/bond_sysfs.c | 39 +++++----
drivers/net/bonding/bonding.h | 59 +++++---------
6 files changed, 145 insertions(+), 201 deletions(-)
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 390061d..80e288c 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -143,10 +143,13 @@ static inline struct bonding *__get_bond_by_port(struct port *port)
*/
static inline struct port *__get_first_port(struct bonding *bond)
{
+ struct slave *first_slave;
+
if (bond->slave_cnt == 0)
return NULL;
+ first_slave = bond_first_slave(bond);
- return &(SLAVE_AD_INFO(bond->first_slave).port);
+ return &(SLAVE_AD_INFO(first_slave).port);
}
/**
@@ -159,13 +162,14 @@ static inline struct port *__get_first_port(struct bonding *bond)
static inline struct port *__get_next_port(struct port *port)
{
struct bonding *bond = __get_bond_by_port(port);
- struct slave *slave = port->slave;
+ struct slave *slave = port->slave, *slave_next;
// If there's no bond for this port, or this is the last slave
- if ((bond == NULL) || (slave->next == bond->first_slave))
+ if (bond == NULL || slave->list.next == &bond->slave_list)
return NULL;
+ slave_next = bond_next_slave(bond, slave);
- return &(SLAVE_AD_INFO(slave->next).port);
+ return &(SLAVE_AD_INFO(slave_next).port);
}
/**
@@ -178,12 +182,14 @@ static inline struct port *__get_next_port(struct port *port)
static inline struct aggregator *__get_first_agg(struct port *port)
{
struct bonding *bond = __get_bond_by_port(port);
+ struct slave *first_slave;
// If there's no bond for this port, or bond has no slaves
- if ((bond == NULL) || (bond->slave_cnt == 0))
+ if (bond == NULL || bond->slave_cnt == 0)
return NULL;
+ first_slave = bond_first_slave(bond);
- return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
+ return &(SLAVE_AD_INFO(first_slave).aggregator);
}
/**
@@ -195,14 +201,15 @@ static inline struct aggregator *__get_first_agg(struct port *port)
*/
static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
{
- struct slave *slave = aggregator->slave;
+ struct slave *slave = aggregator->slave, *slave_next;
struct bonding *bond = bond_get_bond_by_slave(slave);
// If there's no bond for this aggregator, or this is the last slave
- if ((bond == NULL) || (slave->next == bond->first_slave))
+ if (bond == NULL || slave->list.next == &bond->slave_list)
return NULL;
+ slave_next = bond_next_slave(bond, slave);
- return &(SLAVE_AD_INFO(slave->next).aggregator);
+ return &(SLAVE_AD_INFO(slave_next).aggregator);
}
/*
@@ -2336,8 +2343,10 @@ void bond_3ad_handle_link_change(struct slave *slave, char link)
int bond_3ad_set_carrier(struct bonding *bond)
{
struct aggregator *active;
+ struct slave *first_slave;
- active = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
+ first_slave = bond_first_slave(bond);
+ active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
if (active) {
/* are enough slaves available to consider link up? */
if (active->num_of_ports < bond->params.min_links) {
@@ -2432,7 +2441,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
if (agg && (agg->aggregator_identifier == agg_id)) {
@@ -2501,7 +2510,6 @@ int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
*/
void bond_3ad_update_lacp_rate(struct bonding *bond)
{
- int i;
struct slave *slave;
struct port *port = NULL;
int lacp_fast;
@@ -2509,7 +2517,7 @@ void bond_3ad_update_lacp_rate(struct bonding *bond)
write_lock_bh(&bond->lock);
lacp_fast = bond->params.lacp_fast;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
port = &(SLAVE_AD_INFO(slave).port);
if (port->slave == NULL)
continue;
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 4ea8ed1..41889e3 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -224,13 +224,12 @@ static struct slave *tlb_get_least_loaded_slave(struct bonding *bond)
{
struct slave *slave, *least_loaded;
long long max_gap;
- int i;
least_loaded = NULL;
max_gap = LLONG_MIN;
/* Find the slave with the largest gap */
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (SLAVE_IS_OK(slave)) {
long long gap = compute_gap(slave);
@@ -386,11 +385,10 @@ static struct slave *rlb_next_rx_slave(struct bonding *bond)
struct slave *rx_slave, *slave, *start_at;
int i = 0;
- if (bond_info->next_rx_slave) {
+ if (bond_info->next_rx_slave)
start_at = bond_info->next_rx_slave;
- } else {
- start_at = bond->first_slave;
- }
+ else
+ start_at = bond_first_slave(bond);
rx_slave = NULL;
@@ -405,7 +403,8 @@ static struct slave *rlb_next_rx_slave(struct bonding *bond)
}
if (rx_slave) {
- bond_info->next_rx_slave = rx_slave->next;
+ slave = bond_next_slave(bond, rx_slave);
+ bond_info->next_rx_slave = slave;
}
return rx_slave;
@@ -1173,7 +1172,6 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
{
struct slave *tmp_slave1, *free_mac_slave = NULL;
struct slave *has_bond_addr = bond->curr_active_slave;
- int i;
if (bond->slave_cnt == 0) {
/* this is the first slave */
@@ -1196,7 +1194,7 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
/* The slave's address is equal to the address of the bond.
* Search for a spare address in the bond for this slave.
*/
- bond_for_each_slave(bond, tmp_slave1, i) {
+ list_for_each_entry(tmp_slave1, &bond->slave_list, list) {
if (!bond_slave_has_mac(bond, tmp_slave1->perm_hwaddr)) {
/* no slave has tmp_slave1's perm addr
* as its curr addr
@@ -1246,17 +1244,15 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
*/
static int alb_set_mac_address(struct bonding *bond, void *addr)
{
- struct sockaddr sa;
- struct slave *slave, *stop_at;
char tmp_addr[ETH_ALEN];
+ struct slave *slave;
+ struct sockaddr sa;
int res;
- int i;
- if (bond->alb_info.rlb_enabled) {
+ if (bond->alb_info.rlb_enabled)
return 0;
- }
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
/* save net_device's current hw address */
memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
@@ -1276,8 +1272,7 @@ unwind:
sa.sa_family = bond->dev->type;
/* unwind from head to the slave that failed */
- stop_at = slave;
- bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ list_for_each_entry_continue_reverse(slave, &bond->slave_list, list) {
memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN);
dev_set_mac_address(slave->dev, &sa);
memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN);
@@ -1460,7 +1455,6 @@ void bond_alb_monitor(struct work_struct *work)
alb_work.work);
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
struct slave *slave;
- int i;
read_lock(&bond->lock);
@@ -1482,9 +1476,8 @@ void bond_alb_monitor(struct work_struct *work)
*/
read_lock(&bond->curr_slave_lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list)
alb_send_learning_packets(slave, slave->dev->dev_addr);
- }
read_unlock(&bond->curr_slave_lock);
@@ -1496,7 +1489,7 @@ void bond_alb_monitor(struct work_struct *work)
read_lock(&bond->curr_slave_lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
tlb_clear_slave(bond, slave, 1);
if (slave == bond->curr_active_slave) {
SLAVE_TLB_INFO(slave).load =
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index da3af63..d50a511 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -441,10 +441,10 @@ static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
__be16 proto, u16 vid)
{
struct bonding *bond = netdev_priv(bond_dev);
- struct slave *slave, *stop_at;
- int i, res;
+ struct slave *slave;
+ int res;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
res = vlan_vid_add(slave->dev, proto, vid);
if (res)
goto unwind;
@@ -461,8 +461,7 @@ static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
unwind:
/* unwind from head to the slave that failed */
- stop_at = slave;
- bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at)
+ list_for_each_entry_continue_reverse(slave, &bond->slave_list, list)
vlan_vid_del(slave->dev, proto, vid);
return res;
@@ -478,9 +477,9 @@ static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
{
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave;
- int i, res;
+ int res;
- bond_for_each_slave(bond, slave, i)
+ list_for_each_entry(slave, &bond->slave_list, list)
vlan_vid_del(slave->dev, proto, vid);
res = bond_del_vlan(bond, vid);
@@ -532,7 +531,6 @@ static void bond_del_vlans_from_slave(struct bonding *bond,
static int bond_set_carrier(struct bonding *bond)
{
struct slave *slave;
- int i;
if (bond->slave_cnt == 0)
goto down;
@@ -540,7 +538,7 @@ static int bond_set_carrier(struct bonding *bond)
if (bond->params.mode == BOND_MODE_8023AD)
return bond_3ad_set_carrier(bond);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (slave->link == BOND_LINK_UP) {
if (!netif_carrier_ok(bond->dev)) {
netif_carrier_on(bond->dev);
@@ -681,8 +679,8 @@ static int bond_set_promiscuity(struct bonding *bond, int inc)
}
} else {
struct slave *slave;
- int i;
- bond_for_each_slave(bond, slave, i) {
+
+ list_for_each_entry(slave, &bond->slave_list, list) {
err = dev_set_promiscuity(slave->dev, inc);
if (err)
return err;
@@ -705,8 +703,8 @@ static int bond_set_allmulti(struct bonding *bond, int inc)
}
} else {
struct slave *slave;
- int i;
- bond_for_each_slave(bond, slave, i) {
+
+ list_for_each_entry(slave, &bond->slave_list, list) {
err = dev_set_allmulti(slave->dev, inc);
if (err)
return err;
@@ -936,7 +934,7 @@ static struct slave *bond_find_best_slave(struct bonding *bond)
if (!new_active) { /* there were no active slaves left */
if (bond->slave_cnt > 0) /* found one slave */
- new_active = bond->first_slave;
+ new_active = bond_first_slave(bond);
else
return NULL; /* still no slave, return NULL */
}
@@ -1130,17 +1128,7 @@ void bond_select_active_slave(struct bonding *bond)
*/
static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
{
- if (bond->first_slave == NULL) { /* attaching the first slave */
- new_slave->next = new_slave;
- new_slave->prev = new_slave;
- bond->first_slave = new_slave;
- } else {
- new_slave->next = bond->first_slave;
- new_slave->prev = bond->first_slave->prev;
- new_slave->next->prev = new_slave;
- new_slave->prev->next = new_slave;
- }
-
+ list_add_tail(&new_slave->list, &bond->slave_list);
bond->slave_cnt++;
}
@@ -1156,22 +1144,7 @@ static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
*/
static void bond_detach_slave(struct bonding *bond, struct slave *slave)
{
- if (slave->next)
- slave->next->prev = slave->prev;
-
- if (slave->prev)
- slave->prev->next = slave->next;
-
- if (bond->first_slave == slave) { /* slave is the first slave */
- if (bond->slave_cnt > 1) { /* there are more slave */
- bond->first_slave = slave->next;
- } else {
- bond->first_slave = NULL; /* slave was the last one */
- }
- }
-
- slave->next = NULL;
- slave->prev = NULL;
+ list_del(&slave->list);
bond->slave_cnt--;
}
@@ -1222,9 +1195,8 @@ static void bond_netpoll_cleanup(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave;
- int i;
- bond_for_each_slave(bond, slave, i)
+ list_for_each_entry(slave, &bond->slave_list, list)
if (IS_UP(slave->dev))
slave_disable_netpoll(slave);
}
@@ -1233,9 +1205,9 @@ static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, g
{
struct bonding *bond = netdev_priv(dev);
struct slave *slave;
- int i, err = 0;
+ int err = 0;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
err = slave_enable_netpoll(slave);
if (err) {
bond_netpoll_cleanup(dev);
@@ -1265,11 +1237,10 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
struct slave *slave;
struct bonding *bond = netdev_priv(dev);
netdev_features_t mask;
- int i;
read_lock(&bond->lock);
- if (!bond->first_slave) {
+ if (list_empty(&bond->slave_list)) {
/* Disable adding VLANs to empty bond. But why? --mq */
features |= NETIF_F_VLAN_CHALLENGED;
goto out;
@@ -1279,7 +1250,7 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
features &= ~NETIF_F_ONE_FOR_ALL;
features |= NETIF_F_ALL_FOR_ALL;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
features = netdev_increment_features(features,
slave->dev->features,
mask);
@@ -1303,15 +1274,14 @@ static void bond_compute_features(struct bonding *bond)
unsigned short max_hard_header_len = ETH_HLEN;
unsigned int gso_max_size = GSO_MAX_SIZE;
u16 gso_max_segs = GSO_MAX_SEGS;
- int i;
unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
read_lock(&bond->lock);
- if (!bond->first_slave)
+ if (list_empty(&bond->slave_list))
goto done;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
vlan_features = netdev_increment_features(vlan_features,
slave->dev->vlan_features, BOND_VLAN_FEATURES);
@@ -1562,7 +1532,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
res = -ENOMEM;
goto err_undo_flags;
}
-
+ INIT_LIST_HEAD(&new_slave->list);
/*
* Set the new_slave's queue_id to be zero. Queue ID mapping
* is set via sysfs or module option if desired.
@@ -1755,8 +1725,11 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
*/
bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
} else {
+ struct slave *prev_slave;
+
+ prev_slave = to_slave(new_slave->list.prev);
SLAVE_AD_INFO(new_slave).id =
- SLAVE_AD_INFO(new_slave->prev).id + 1;
+ SLAVE_AD_INFO(prev_slave).id + 1;
}
bond_3ad_bind_slave(new_slave);
@@ -2167,13 +2140,13 @@ static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
{
struct bonding *bond = netdev_priv(bond_dev);
+ int i = 0, res = -ENODEV;
struct slave *slave;
- int i, res = -ENODEV;
read_lock(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
- if (i == (int)info->slave_id) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
+ if (i++ == (int)info->slave_id) {
res = 0;
strcpy(info->slave_name, slave->dev->name);
info->link = slave->link;
@@ -2193,13 +2166,13 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in
static int bond_miimon_inspect(struct bonding *bond)
{
+ int link_state, commit = 0;
struct slave *slave;
- int i, link_state, commit = 0;
bool ignore_updelay;
ignore_updelay = !bond->curr_active_slave ? true : false;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
slave->new_link = BOND_LINK_NOCHANGE;
link_state = bond_check_dev_link(bond, slave->dev, 0);
@@ -2294,9 +2267,8 @@ static int bond_miimon_inspect(struct bonding *bond)
static void bond_miimon_commit(struct bonding *bond)
{
struct slave *slave;
- int i;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
switch (slave->new_link) {
case BOND_LINK_NOCHANGE:
continue;
@@ -2681,7 +2653,6 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
struct slave *slave, *oldcurrent;
int do_failover = 0;
int delta_in_ticks, extra_ticks;
- int i;
read_lock(&bond->lock);
@@ -2703,7 +2674,7 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
* TODO: what about up/down delay in arp mode? it wasn't here before
* so it can wait
*/
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
unsigned long trans_start = dev_trans_start(slave->dev);
if (slave->link != BOND_LINK_UP) {
@@ -2800,10 +2771,10 @@ re_arm:
*/
static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
{
- struct slave *slave;
- int i, commit = 0;
unsigned long trans_start;
+ struct slave *slave;
int extra_ticks;
+ int commit = 0;
/* All the time comparisons below need some extra time. Otherwise, on
* fast networks the ARP probe/reply may arrive within the same jiffy
@@ -2812,7 +2783,7 @@ static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
*/
extra_ticks = delta_in_ticks / 2;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
slave->new_link = BOND_LINK_NOCHANGE;
if (slave->link != BOND_LINK_UP) {
@@ -2891,11 +2862,10 @@ static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
*/
static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
{
- struct slave *slave;
- int i;
unsigned long trans_start;
+ struct slave *slave;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
switch (slave->new_link) {
case BOND_LINK_NOCHANGE:
continue;
@@ -2968,7 +2938,7 @@ do_failover:
*/
static void bond_ab_arp_probe(struct bonding *bond)
{
- struct slave *slave;
+ struct slave *slave, *next_slave;
int i;
read_lock(&bond->curr_slave_lock);
@@ -2992,7 +2962,7 @@ static void bond_ab_arp_probe(struct bonding *bond)
*/
if (!bond->current_arp_slave) {
- bond->current_arp_slave = bond->first_slave;
+ bond->current_arp_slave = bond_first_slave(bond);
if (!bond->current_arp_slave)
return;
}
@@ -3000,7 +2970,8 @@ static void bond_ab_arp_probe(struct bonding *bond)
bond_set_slave_inactive_flags(bond->current_arp_slave);
/* search for next candidate */
- bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
+ next_slave = bond_next_slave(bond, bond->current_arp_slave);
+ bond_for_each_slave_from(bond, slave, i, next_slave) {
if (IS_UP(slave->dev)) {
slave->link = BOND_LINK_BACK;
bond_set_slave_active_flags(slave);
@@ -3361,13 +3332,12 @@ static int bond_open(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave;
- int i;
/* reset slave->backup and slave->inactive */
read_lock(&bond->lock);
if (bond->slave_cnt > 0) {
read_lock(&bond->curr_slave_lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
&& (slave != bond->curr_active_slave)) {
bond_set_slave_inactive_flags(slave);
@@ -3435,13 +3405,12 @@ static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
struct bonding *bond = netdev_priv(bond_dev);
struct rtnl_link_stats64 temp;
struct slave *slave;
- int i;
memset(stats, 0, sizeof(*stats));
read_lock_bh(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
const struct rtnl_link_stats64 *sstats =
dev_get_stats(slave->dev, &temp);
@@ -3610,7 +3579,6 @@ static void bond_set_rx_mode(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
struct slave *slave;
- int i;
read_lock(&bond->lock);
@@ -3623,7 +3591,7 @@ static void bond_set_rx_mode(struct net_device *bond_dev)
}
read_unlock(&bond->curr_slave_lock);
} else {
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
dev_uc_sync_multiple(slave->dev, bond_dev);
dev_mc_sync_multiple(slave->dev, bond_dev);
}
@@ -3635,14 +3603,15 @@ static void bond_set_rx_mode(struct net_device *bond_dev)
static int bond_neigh_init(struct neighbour *n)
{
struct bonding *bond = netdev_priv(n->dev);
- struct slave *slave = bond->first_slave;
const struct net_device_ops *slave_ops;
struct neigh_parms parms;
+ struct slave *slave;
int ret;
- if (!slave)
+ if (list_empty(&bond->slave_list))
return 0;
+ slave = bond_first_slave(bond);
slave_ops = slave->dev->netdev_ops;
if (!slave_ops->ndo_neigh_setup)
@@ -3687,9 +3656,8 @@ static int bond_neigh_setup(struct net_device *dev,
static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
{
struct bonding *bond = netdev_priv(bond_dev);
- struct slave *slave, *stop_at;
+ struct slave *slave;
int res = 0;
- int i;
pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
(bond_dev ? bond_dev->name : "None"), new_mtu);
@@ -3709,10 +3677,10 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
* call to the base driver.
*/
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
pr_debug("s %p s->p %p c_m %p\n",
slave,
- slave->prev,
+ to_slave(slave->list.prev),
slave->dev->netdev_ops->ndo_change_mtu);
res = dev_set_mtu(slave->dev, new_mtu);
@@ -3737,8 +3705,7 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
unwind:
/* unwind from head to the slave that failed */
- stop_at = slave;
- bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ list_for_each_entry_continue_reverse(slave, &bond->slave_list, list) {
int tmp_res;
tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
@@ -3762,9 +3729,8 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
{
struct bonding *bond = netdev_priv(bond_dev);
struct sockaddr *sa = addr, tmp_sa;
- struct slave *slave, *stop_at;
+ struct slave *slave;
int res = 0;
- int i;
if (bond->params.mode == BOND_MODE_ALB)
return bond_alb_set_mac_address(bond_dev, addr);
@@ -3797,7 +3763,7 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
* call to the base driver.
*/
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
pr_debug("slave %p %s\n", slave, slave->dev->name);
@@ -3829,8 +3795,7 @@ unwind:
tmp_sa.sa_family = bond_dev->type;
/* unwind from head to the slave that failed */
- stop_at = slave;
- bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
+ list_for_each_entry_continue_reverse(slave, &bond->slave_list, list) {
int tmp_res;
tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
@@ -3874,7 +3839,7 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev
*/
slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
slave_no--;
if (slave_no < 0)
break;
@@ -3940,7 +3905,7 @@ static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
slave_no--;
if (slave_no < 0)
break;
@@ -4041,15 +4006,15 @@ static void bond_set_xmit_hash_policy(struct bonding *bond)
static inline int bond_slave_override(struct bonding *bond,
struct sk_buff *skb)
{
- int i, res = 1;
struct slave *slave = NULL;
struct slave *check_slave;
+ int res = 1;
if (!skb->queue_mapping)
return 1;
/* Find out if any slaves have the same mapping as this skb. */
- bond_for_each_slave(bond, check_slave, i) {
+ list_for_each_entry(check_slave, &bond->slave_list, list) {
if (check_slave->queue_id == skb->queue_mapping) {
slave = check_slave;
break;
@@ -4182,9 +4147,8 @@ static int bond_ethtool_get_settings(struct net_device *bond_dev,
struct ethtool_cmd *ecmd)
{
struct bonding *bond = netdev_priv(bond_dev);
- struct slave *slave;
- int i;
unsigned long speed = 0;
+ struct slave *slave;
ecmd->duplex = DUPLEX_UNKNOWN;
ecmd->port = PORT_OTHER;
@@ -4195,7 +4159,7 @@ static int bond_ethtool_get_settings(struct net_device *bond_dev,
* this is an accurate maximum.
*/
read_lock(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (SLAVE_IS_OK(slave)) {
if (slave->speed != SPEED_UNKNOWN)
speed += slave->speed;
@@ -4206,6 +4170,7 @@ static int bond_ethtool_get_settings(struct net_device *bond_dev,
}
ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN);
read_unlock(&bond->lock);
+
return 0;
}
@@ -4269,7 +4234,7 @@ static void bond_setup(struct net_device *bond_dev)
/* initialize rwlocks */
rwlock_init(&bond->lock);
rwlock_init(&bond->curr_slave_lock);
-
+ INIT_LIST_HEAD(&bond->slave_list);
bond->params = bonding_defaults;
/* Initialize pointers */
@@ -4326,13 +4291,14 @@ static void bond_setup(struct net_device *bond_dev)
static void bond_uninit(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave, *tmp_slave;
struct vlan_entry *vlan, *tmp;
bond_netpoll_cleanup(bond_dev);
/* Release the bonded slaves */
- while (bond->first_slave != NULL)
- __bond_release_one(bond_dev, bond->first_slave->dev, true);
+ list_for_each_entry_safe(slave, tmp_slave, &bond->slave_list, list)
+ __bond_release_one(bond_dev, slave->dev, true);
pr_info("%s: released all slaves\n", bond_dev->name);
list_del(&bond->bond_list);
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
index 4060d41..cf9a388 100644
--- a/drivers/net/bonding/bond_procfs.c
+++ b/drivers/net/bonding/bond_procfs.c
@@ -12,7 +12,6 @@ static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
struct bonding *bond = seq->private;
loff_t off = 0;
struct slave *slave;
- int i;
/* make sure the bond won't be taken away */
rcu_read_lock();
@@ -21,10 +20,9 @@ static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
if (*pos == 0)
return SEQ_START_TOKEN;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list)
if (++off == *pos)
return slave;
- }
return NULL;
}
@@ -36,11 +34,14 @@ static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
++*pos;
if (v == SEQ_START_TOKEN)
- return bond->first_slave;
+ return list_first_entry_or_null(&bond->slave_list,
+ struct slave, list);
- slave = slave->next;
+ if (slave->list.next == &bond->slave_list)
+ return NULL;
+ slave = to_slave(slave->list.next);
- return (slave == bond->first_slave) ? NULL : slave;
+ return slave;
}
static void bond_info_seq_stop(struct seq_file *seq, void *v)
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index ae02c19..a19b163 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -209,12 +209,12 @@ void bond_destroy_slave_symlinks(struct net_device *master,
static ssize_t bonding_show_slaves(struct device *d,
struct device_attribute *attr, char *buf)
{
- struct slave *slave;
- int i, res = 0;
struct bonding *bond = to_bond(d);
+ struct slave *slave;
+ int res = 0;
read_lock(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (res > (PAGE_SIZE - IFNAMSIZ)) {
/* not enough space for another interface name */
if ((PAGE_SIZE - res) > 10)
@@ -227,6 +227,7 @@ static ssize_t bonding_show_slaves(struct device *d,
read_unlock(&bond->lock);
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
+
return res;
}
@@ -668,7 +669,7 @@ static ssize_t bonding_store_arp_targets(struct device *d,
&newtarget);
/* not to race with bond_arp_rcv */
write_lock_bh(&bond->lock);
- bond_for_each_slave(bond, slave, i)
+ list_for_each_entry(slave, &bond->slave_list, list)
slave->target_last_arp_rx[ind] = jiffies;
targets[ind] = newtarget;
write_unlock_bh(&bond->lock);
@@ -694,7 +695,7 @@ static ssize_t bonding_store_arp_targets(struct device *d,
&newtarget);
write_lock_bh(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
targets_rx = slave->target_last_arp_rx;
j = ind;
for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
@@ -1085,10 +1086,9 @@ static ssize_t bonding_store_primary(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
- int i;
- struct slave *slave;
struct bonding *bond = to_bond(d);
char ifname[IFNAMSIZ];
+ struct slave *slave;
if (!rtnl_trylock())
return restart_syscall();
@@ -1114,7 +1114,7 @@ static ssize_t bonding_store_primary(struct device *d,
goto out;
}
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
pr_info("%s: Setting %s as primary slave.\n",
bond->dev->name, slave->dev->name);
@@ -1260,16 +1260,14 @@ static ssize_t bonding_store_active_slave(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
- int i;
- struct slave *slave;
- struct slave *old_active = NULL;
- struct slave *new_active = NULL;
+ struct slave *slave, *old_active, *new_active;
struct bonding *bond = to_bond(d);
char ifname[IFNAMSIZ];
if (!rtnl_trylock())
return restart_syscall();
+ old_active = new_active = NULL;
block_netpoll_tx();
read_lock(&bond->lock);
write_lock_bh(&bond->curr_slave_lock);
@@ -1291,7 +1289,7 @@ static ssize_t bonding_store_active_slave(struct device *d,
goto out;
}
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
old_active = bond->curr_active_slave;
new_active = slave;
@@ -1475,15 +1473,15 @@ static ssize_t bonding_show_queue_id(struct device *d,
struct device_attribute *attr,
char *buf)
{
- struct slave *slave;
- int i, res = 0;
struct bonding *bond = to_bond(d);
+ struct slave *slave;
+ int res = 0;
if (!rtnl_trylock())
return restart_syscall();
read_lock(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
/* not enough space for another interface_name:queue_id pair */
if ((PAGE_SIZE - res) > 10)
@@ -1498,6 +1496,7 @@ static ssize_t bonding_show_queue_id(struct device *d,
if (res)
buf[res-1] = '\n'; /* eat the leftover space */
rtnl_unlock();
+
return res;
}
@@ -1512,7 +1511,7 @@ static ssize_t bonding_store_queue_id(struct device *d,
struct slave *slave, *update_slave;
struct bonding *bond = to_bond(d);
u16 qid;
- int i, ret = count;
+ int ret = count;
char *delim;
struct net_device *sdev = NULL;
@@ -1547,7 +1546,7 @@ static ssize_t bonding_store_queue_id(struct device *d,
/* Search for thes slave and check for duplicate qids */
update_slave = NULL;
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (sdev == slave->dev)
/*
* We don't need to check the matching
@@ -1599,8 +1598,8 @@ static ssize_t bonding_store_slaves_active(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
- int i, new_value, ret = count;
struct bonding *bond = to_bond(d);
+ int new_value, ret = count;
struct slave *slave;
if (sscanf(buf, "%d", &new_value) != 1) {
@@ -1623,7 +1622,7 @@ static ssize_t bonding_store_slaves_active(struct device *d,
}
read_lock(&bond->lock);
- bond_for_each_slave(bond, slave, i) {
+ list_for_each_entry(slave, &bond->slave_list, list) {
if (!bond_is_active_slave(slave)) {
if (new_value)
slave->inactive = 0;
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 42d1c65..6d05814 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -71,46 +71,28 @@
set_fs(fs); \
res; })
-/**
- * bond_for_each_slave_from - iterate the slaves list from a starting point
- * @bond: the bond holding this list.
- * @pos: current slave.
- * @cnt: counter for max number of moves
- * @start: starting point.
- *
- * Caller must hold bond->lock
- */
-#define bond_for_each_slave_from(bond, pos, cnt, start) \
- for (cnt = 0, pos = start; \
- cnt < (bond)->slave_cnt; \
- cnt++, pos = (pos)->next)
+/* slave list primitives */
+#define to_slave(ptr) list_entry(ptr, struct slave, list)
-/**
- * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
- * @bond: the bond holding this list.
- * @pos: current slave.
- * @cnt: counter for number max of moves
- * @start: start point.
- * @stop: stop point.
- *
- * Caller must hold bond->lock
- */
-#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
- for (cnt = 0, pos = start; \
- ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
- cnt++, pos = (pos)->next)
+#define bond_first_slave(bond) \
+ list_first_entry(&(bond)->slave_list, struct slave, list)
+
+#define bond_next_slave(bond, pos) \
+ (pos)->list.next == &(bond)->slave_list ? bond_first_slave(bond) : \
+ to_slave((pos)->list.next)
/**
- * bond_for_each_slave - iterate the slaves list from head
+ * bond_for_each_slave_from - iterate the slaves list from a starting point
* @bond: the bond holding this list.
* @pos: current slave.
* @cnt: counter for max number of moves
+ * @start: starting point.
*
* Caller must hold bond->lock
*/
-#define bond_for_each_slave(bond, pos, cnt) \
- bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
-
+#define bond_for_each_slave_from(bond, pos, cnt, start) \
+ for (cnt = 0, pos = start; cnt < (bond)->slave_cnt; \
+ cnt++, pos = bond_next_slave(bond, pos))
#ifdef CONFIG_NET_POLL_CONTROLLER
extern atomic_t netpoll_block_tx;
@@ -174,8 +156,7 @@ struct vlan_entry {
struct slave {
struct net_device *dev; /* first - useful for panic debug */
- struct slave *next;
- struct slave *prev;
+ struct list_head list;
struct bonding *bond; /* our master */
int delay;
unsigned long jiffies;
@@ -215,7 +196,7 @@ struct slave {
*/
struct bonding {
struct net_device *dev; /* first - useful for panic debug */
- struct slave *first_slave;
+ struct list_head slave_list;
struct slave *curr_active_slave;
struct slave *current_arp_slave;
struct slave *primary_slave;
@@ -270,13 +251,10 @@ static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
struct net_device *slave_dev)
{
struct slave *slave = NULL;
- int i;
- bond_for_each_slave(bond, slave, i) {
- if (slave->dev == slave_dev) {
+ list_for_each_entry(slave, &bond->slave_list, list)
+ if (slave->dev == slave_dev)
return slave;
- }
- }
return NULL;
}
@@ -477,10 +455,9 @@ static inline void bond_destroy_proc_dir(struct bond_net *bn)
static inline struct slave *bond_slave_has_mac(struct bonding *bond,
const u8 *mac)
{
- int i = 0;
struct slave *tmp;
- bond_for_each_slave(bond, tmp, i)
+ list_for_each_entry(tmp, &bond->slave_list, list)
if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
return tmp;
--
1.8.1.4
--
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