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netdev: Allocate multiple queues for TX. 

alloc_netdev_mq() now allocates an array of netdev_queue
structures for TX, based upon the queue_count argument.

Furthermore, all accesses to the TX queues are now vectored
through the netdev_get_tx_queue() and netdev_for_each_tx_queue()
interfaces.  This makes it easy to grep the tree for all
things that want to get to a TX queue of a net device.

Problem spots which are not really multiqueue aware yet, and
only work with one queue, can easily be spotted by grepping
for all netdev_get_tx_queue() calls that pass in a zero index.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-07-17 00:34:19 -07:00
parent 070825b384
commit e8a0464cc9
18 changed files with 320 additions and 137 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/bonding/bond_main.c
View File

@ -5042,7 +5042,9 @@ static int bond_check_params(struct bond_params *params)
static struct lock_class_key bonding_netdev_xmit_lock_key;
static void bond_set_lockdep_class_one(struct netdev_queue *txq)
static void bond_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&bonding_netdev_xmit_lock_key);
@ -5050,7 +5052,7 @@ static void bond_set_lockdep_class_one(struct netdev_queue *txq)
static void bond_set_lockdep_class(struct net_device *dev)
{
bond_set_lockdep_class_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
}
/* Create a new bond based on the specified name and bonding parameters.

6
drivers/net/hamradio/bpqether.c
View File

@ -124,14 +124,16 @@ static LIST_HEAD(bpq_devices);
*/
static struct lock_class_key bpq_netdev_xmit_lock_key;
static void bpq_set_lockdep_class_one(struct netdev_queue *txq)
static void bpq_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &bpq_netdev_xmit_lock_key);
}
static void bpq_set_lockdep_class(struct net_device *dev)
{
bpq_set_lockdep_class_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, bpq_set_lockdep_class_one, NULL);
}
/* ------------------------------------------------------------------------ */

12
drivers/net/ifb.c
View File

@ -229,14 +229,20 @@ module_param(numifbs, int, 0);
MODULE_PARM_DESC(numifbs, "Number of ifb devices");
/*
* dev_ifb->tx_queue.lock is usually taken after dev->rx_queue.lock,
* dev_ifb's TX queue lock is usually taken after dev->rx_queue.lock,
* reversely to e.g. qdisc_lock_tree(). It should be safe until
* ifb doesn't take dev->tx_queue.lock with dev_ifb->rx_queue.lock.
* ifb doesn't take dev's TX queue lock with dev_ifb->rx_queue.lock.
* But lockdep should know that ifb has different locks from dev.
*/
static struct lock_class_key ifb_tx_queue_lock_key;
static struct lock_class_key ifb_rx_queue_lock_key;
static void set_tx_lockdep_key(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->lock, &ifb_tx_queue_lock_key);
}
static int __init ifb_init_one(int index)
{
@ -258,7 +264,7 @@ static int __init ifb_init_one(int index)
if (err < 0)
goto err;
lockdep_set_class(&dev_ifb->tx_queue.lock, &ifb_tx_queue_lock_key);
netdev_for_each_tx_queue(dev_ifb, set_tx_lockdep_key, NULL);
lockdep_set_class(&dev_ifb->rx_queue.lock, &ifb_rx_queue_lock_key);
return 0;

6
drivers/net/macvlan.c
View File

@ -285,7 +285,9 @@ static struct lock_class_key macvlan_netdev_xmit_lock_key;
#define MACVLAN_STATE_MASK \
((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
static void macvlan_set_lockdep_class_one(struct netdev_queue *txq)
static void macvlan_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&macvlan_netdev_xmit_lock_key);
@ -293,7 +295,7 @@ static void macvlan_set_lockdep_class_one(struct netdev_queue *txq)
static void macvlan_set_lockdep_class(struct net_device *dev)
{
macvlan_set_lockdep_class_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
}
static int macvlan_init(struct net_device *dev)

6
drivers/net/wireless/hostap/hostap_hw.c
View File

@ -3102,7 +3102,9 @@ static void prism2_clear_set_tim_queue(local_info_t *local)
*/
static struct lock_class_key hostap_netdev_xmit_lock_key;
static void prism2_set_lockdep_class_one(struct netdev_queue *txq)
static void prism2_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&hostap_netdev_xmit_lock_key);
@ -3110,7 +3112,7 @@ static void prism2_set_lockdep_class_one(struct netdev_queue *txq)
static void prism2_set_lockdep_class(struct net_device *dev)
{
prism2_set_lockdep_class_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
}
static struct net_device *

69
include/linux/netdevice.h
View File

@ -463,7 +463,7 @@ struct netdev_queue {
struct Qdisc *qdisc_sleeping;
struct list_head qdisc_list;
struct netdev_queue *next_sched;
};
} ____cacheline_aligned_in_smp;
/*
* The DEVICE structure.
@ -641,7 +641,9 @@ struct net_device
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
struct netdev_queue rx_queue;
struct netdev_queue tx_queue ____cacheline_aligned_in_smp;
struct netdev_queue *_tx ____cacheline_aligned_in_smp;
unsigned int num_tx_queues;
unsigned long tx_queue_len; /* Max frames per queue allowed */
/*
@ -764,6 +766,25 @@ struct net_device
#define NETDEV_ALIGN 32
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
unsigned int index)
{
return &dev->_tx[index];
}
static inline void netdev_for_each_tx_queue(struct net_device *dev,
void (*f)(struct net_device *,
struct netdev_queue *,
void *),
void *arg)
{
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++)
f(dev, &dev->_tx[i], arg);
}
/*
* Net namespace inlines
*/
@ -977,7 +998,7 @@ static inline void netif_schedule_queue(struct netdev_queue *txq)
static inline void netif_schedule(struct net_device *dev)
{
netif_schedule_queue(&dev->tx_queue);
netif_schedule_queue(netdev_get_tx_queue(dev, 0));
}
/**
@ -993,7 +1014,7 @@ static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
static inline void netif_start_queue(struct net_device *dev)
{
netif_tx_start_queue(&dev->tx_queue);
netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
}
/**
@ -1017,7 +1038,7 @@ static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
static inline void netif_wake_queue(struct net_device *dev)
{
netif_tx_wake_queue(&dev->tx_queue);
netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
}
/**
@ -1034,7 +1055,7 @@ static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
static inline void netif_stop_queue(struct net_device *dev)
{
netif_tx_stop_queue(&dev->tx_queue);
netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
}
/**
@ -1050,7 +1071,7 @@ static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
static inline int netif_queue_stopped(const struct net_device *dev)
{
return netif_tx_queue_stopped(&dev->tx_queue);
return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
}
/**
@ -1134,7 +1155,7 @@ static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
#endif
if (test_and_clear_bit(__QUEUE_STATE_XOFF,
&dev->egress_subqueue[queue_index].state))
__netif_schedule(&dev->tx_queue);
__netif_schedule(netdev_get_tx_queue(dev, 0));
}
/**
@ -1430,18 +1451,19 @@ static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
static inline void netif_tx_lock(struct net_device *dev)
{
__netif_tx_lock(&dev->tx_queue, smp_processor_id());
}
int cpu = smp_processor_id();
unsigned int i;
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
spin_lock_bh(&txq->_xmit_lock);
txq->xmit_lock_owner = smp_processor_id();
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
__netif_tx_lock(txq, cpu);
}
}
static inline void netif_tx_lock_bh(struct net_device *dev)
{
__netif_tx_lock_bh(&dev->tx_queue);
local_bh_disable();
netif_tx_lock(dev);
}
static inline int __netif_tx_trylock(struct netdev_queue *txq)
@ -1454,7 +1476,7 @@ static inline int __netif_tx_trylock(struct netdev_queue *txq)
static inline int netif_tx_trylock(struct net_device *dev)
{
return __netif_tx_trylock(&dev->tx_queue);
return __netif_tx_trylock(netdev_get_tx_queue(dev, 0));
}
static inline void __netif_tx_unlock(struct netdev_queue *txq)
@ -1465,18 +1487,19 @@ static inline void __netif_tx_unlock(struct netdev_queue *txq)
static inline void netif_tx_unlock(struct net_device *dev)
{
__netif_tx_unlock(&dev->tx_queue);
}
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
__netif_tx_unlock(txq);
}
static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
{
txq->xmit_lock_owner = -1;
spin_unlock_bh(&txq->_xmit_lock);
}
static inline void netif_tx_unlock_bh(struct net_device *dev)
{
__netif_tx_unlock_bh(&dev->tx_queue);
netif_tx_unlock(dev);
local_bh_enable();
}
#define HARD_TX_LOCK(dev, txq, cpu) { \

37
include/net/sch_generic.h
View File

@ -230,32 +230,47 @@ extern void tcf_destroy_chain(struct tcf_proto **fl);
/* Reset all TX qdiscs of a device. */
static inline void qdisc_reset_all_tx(struct net_device *dev)
{
qdisc_reset(dev->tx_queue.qdisc);
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++)
qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc);
}
/* Are all TX queues of the device empty? */
static inline bool qdisc_all_tx_empty(const struct net_device *dev)
{
const struct netdev_queue *txq = &dev->tx_queue;
const struct Qdisc *q = txq->qdisc;
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
const struct Qdisc *q = txq->qdisc;
return (q->q.qlen == 0);
if (q->q.qlen)
return false;
}
return true;
}
/* Are any of the TX qdiscs changing? */
static inline bool qdisc_tx_changing(struct net_device *dev)
{
struct netdev_queue *txq = &dev->tx_queue;
return (txq->qdisc != txq->qdisc_sleeping);
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
if (txq->qdisc != txq->qdisc_sleeping)
return true;
}
return false;
}
/* Is the device using the noop qdisc? */
/* Is the device using the noop qdisc on all queues? */
static inline bool qdisc_tx_is_noop(const struct net_device *dev)
{
const struct netdev_queue *txq = &dev->tx_queue;
return (txq->qdisc == &noop_qdisc);
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
if (txq->qdisc != &noop_qdisc)
return false;
}
return true;
}
static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,

10
net/8021q/vlan_dev.c
View File

@ -570,16 +570,18 @@ static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
*/
static struct lock_class_key vlan_netdev_xmit_lock_key;
static void vlan_dev_set_lockdep_one(struct netdev_queue *txq,
int subclass)
static void vlan_dev_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_subclass)
{
lockdep_set_class_and_subclass(&txq->_xmit_lock,
&vlan_netdev_xmit_lock_key, subclass);
&vlan_netdev_xmit_lock_key,
*(int *)_subclass);
}
static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
{
vlan_dev_set_lockdep_one(&dev->tx_queue, subclass);
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
}
static const struct header_ops vlan_header_ops = {

40
net/core/dev.c
View File

@ -1666,6 +1666,12 @@ out_kfree_skb:
* --BLG
*/
static struct netdev_queue *dev_pick_tx(struct net_device *dev,
struct sk_buff *skb)
{
return netdev_get_tx_queue(dev, 0);
}
int dev_queue_xmit(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
@ -1702,7 +1708,7 @@ int dev_queue_xmit(struct sk_buff *skb)
}
gso:
txq = &dev->tx_queue;
txq = dev_pick_tx(dev, skb);
spin_lock_prefetch(&txq->lock);
/* Disable soft irqs for various locks below. Also
@ -3788,8 +3794,9 @@ static void rollback_registered(struct net_device *dev)
dev_put(dev);
}
static void __netdev_init_queue_locks_one(struct netdev_queue *dev_queue,
struct net_device *dev)
static void __netdev_init_queue_locks_one(struct net_device *dev,
struct netdev_queue *dev_queue,
void *_unused)
{
spin_lock_init(&dev_queue->_xmit_lock);
netdev_set_lockdep_class(&dev_queue->_xmit_lock, dev->type);
@ -3798,8 +3805,8 @@ static void __netdev_init_queue_locks_one(struct netdev_queue *dev_queue,
static void netdev_init_queue_locks(struct net_device *dev)
{
__netdev_init_queue_locks_one(&dev->tx_queue, dev);
__netdev_init_queue_locks_one(&dev->rx_queue, dev);
netdev_for_each_tx_queue(dev, __netdev_init_queue_locks_one, NULL);
__netdev_init_queue_locks_one(dev, &dev->rx_queue, NULL);
}
/**
@ -4119,7 +4126,8 @@ static struct net_device_stats *internal_stats(struct net_device *dev)
}
static void netdev_init_one_queue(struct net_device *dev,
struct netdev_queue *queue)
struct netdev_queue *queue,
void *_unused)
{
spin_lock_init(&queue->lock);
queue->dev = dev;
@ -4127,8 +4135,8 @@ static void netdev_init_one_queue(struct net_device *dev,
static void netdev_init_queues(struct net_device *dev)
{
netdev_init_one_queue(dev, &dev->rx_queue);
netdev_init_one_queue(dev, &dev->tx_queue);
netdev_init_one_queue(dev, &dev->rx_queue, NULL);
netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
}
/**
@ -4145,9 +4153,10 @@ static void netdev_init_queues(struct net_device *dev)
struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
void (*setup)(struct net_device *), unsigned int queue_count)
{
void *p;
struct netdev_queue *tx;
struct net_device *dev;
int alloc_size;
void *p;
BUG_ON(strlen(name) >= sizeof(dev->name));
@ -4167,11 +4176,22 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
return NULL;
}
tx = kzalloc(sizeof(struct netdev_queue) * queue_count, GFP_KERNEL);
if (!tx) {
printk(KERN_ERR "alloc_netdev: Unable to allocate "
"tx qdiscs.\n");
kfree(p);
return NULL;
}
dev = (struct net_device *)
(((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
dev->padded = (char *)dev - (char *)p;
dev_net_set(dev, &init_net);
dev->_tx = tx;
dev->num_tx_queues = queue_count;
if (sizeof_priv) {
dev->priv = ((char *)dev +
((sizeof(struct net_device) +
@ -4205,6 +4225,8 @@ void free_netdev(struct net_device *dev)
{
release_net(dev_net(dev));
kfree(dev->_tx);
/* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) {
kfree((char *)dev - dev->padded);

2
net/core/rtnetlink.c
View File

@ -636,7 +636,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
if (dev->master)
NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
txq = &dev->tx_queue;
txq = netdev_get_tx_queue(dev, 0);
if (txq->qdisc_sleeping)
NLA_PUT_STRING(skb, IFLA_QDISC, txq->qdisc_sleeping->ops->id);

4
net/mac80211/main.c
View File

@ -621,7 +621,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
/* ensure that TX flow won't interrupt us
* until the end of the call to requeue function */
txq = &local->mdev->tx_queue;
txq = netdev_get_tx_queue(local->mdev, 0);
spin_lock_bh(&txq->lock);
/* create a new queue for this aggregation */
@ -862,7 +862,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
/* avoid ordering issues: we are the only one that can modify
* the content of the qdiscs */
txq = &local->mdev->tx_queue;
txq = netdev_get_tx_queue(local->mdev, 0);
spin_lock_bh(&txq->lock);
/* remove the queue for this aggregation */
ieee80211_ht_agg_queue_remove(local, sta, tid, 1);

12
net/mac80211/wme.c
View File

@ -574,7 +574,7 @@ static struct Qdisc_ops wme_qdisc_ops __read_mostly =
void ieee80211_install_qdisc(struct net_device *dev)
{
struct netdev_queue *txq = &dev->tx_queue;
struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
struct Qdisc *qdisc;
qdisc = qdisc_create_dflt(dev, txq,
@ -596,7 +596,7 @@ void ieee80211_install_qdisc(struct net_device *dev)
int ieee80211_qdisc_installed(struct net_device *dev)
{
struct netdev_queue *txq = &dev->tx_queue;
struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
return txq->qdisc_sleeping->ops == &wme_qdisc_ops;
}
@ -617,7 +617,7 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
struct sta_info *sta, u16 tid)
{
int i;
struct netdev_queue *txq = &local->mdev->tx_queue;
struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
struct ieee80211_sched_data *q =
qdisc_priv(txq->qdisc_sleeping);
DECLARE_MAC_BUF(mac);
@ -652,14 +652,14 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
}
/**
* the caller needs to hold local->mdev->tx_queue.lock
* the caller needs to hold netdev_get_tx_queue(local->mdev, X)->lock
*/
void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
struct sta_info *sta, u16 tid,
u8 requeue)
{
struct ieee80211_hw *hw = &local->hw;
struct netdev_queue *txq = &local->mdev->tx_queue;
struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
struct ieee80211_sched_data *q =
qdisc_priv(txq->qdisc_sleeping);
int agg_queue = sta->tid_to_tx_q[tid];
@ -676,7 +676,7 @@ void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local,
void ieee80211_requeue(struct ieee80211_local *local, int queue)
{
struct netdev_queue *txq = &local->mdev->tx_queue;
struct netdev_queue *txq = netdev_get_tx_queue(local->mdev, 0);
struct Qdisc *root_qd = txq->qdisc_sleeping;
struct ieee80211_sched_data *q = qdisc_priv(root_qd);
struct Qdisc *qdisc = q->queues[queue];

6
net/netrom/af_netrom.c
View File

@ -74,14 +74,16 @@ static const struct proto_ops nr_proto_ops;
*/
static struct lock_class_key nr_netdev_xmit_lock_key;
static void nr_set_lockdep_one(struct netdev_queue *txq)
static void nr_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
}
static void nr_set_lockdep_key(struct net_device *dev)
{
nr_set_lockdep_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
}
/*

6
net/rose/af_rose.c
View File

@ -75,14 +75,16 @@ ax25_address rose_callsign;
*/
static struct lock_class_key rose_netdev_xmit_lock_key;
static void rose_set_lockdep_one(struct netdev_queue *txq)
static void rose_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
}
static void rose_set_lockdep_key(struct net_device *dev)
{
rose_set_lockdep_one(&dev->tx_queue);
netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
}
/*

4
net/sched/cls_api.c
View File

@ -166,7 +166,7 @@ replay:
/* Find qdisc */
if (!parent) {
struct netdev_queue *dev_queue = &dev->tx_queue;
struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, 0);
q = dev_queue->qdisc_sleeping;
parent = q->handle;
} else {
@ -410,7 +410,7 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb)
if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
return skb->len;
dev_queue = &dev->tx_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
if (!tcm->tcm_parent)
q = dev_queue->qdisc_sleeping;
else

32
net/sched/sch_api.c
View File

@ -183,9 +183,8 @@ EXPORT_SYMBOL(unregister_qdisc);
(root qdisc, all its children, children of children etc.)
*/
struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
static struct Qdisc *__qdisc_lookup(struct netdev_queue *dev_queue, u32 handle)
{
struct netdev_queue *dev_queue = &dev->tx_queue;
struct Qdisc *q;
list_for_each_entry(q, &dev_queue->qdisc_list, list) {
@ -195,6 +194,19 @@ struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
return NULL;
}
struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
{
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
struct Qdisc *q = __qdisc_lookup(txq, handle);
if (q)
return q;
}
return NULL;
}
static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
{
unsigned long cl;
@ -462,7 +474,7 @@ dev_graft_qdisc(struct net_device *dev, struct Qdisc *qdisc)
}
} else {
dev_queue = &dev->tx_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
oqdisc = dev_queue->qdisc_sleeping;
/* Prune old scheduler */
@ -742,7 +754,8 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
q = dev->rx_queue.qdisc;
}
} else {
struct netdev_queue *dev_queue = &dev->tx_queue;
struct netdev_queue *dev_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
q = dev_queue->qdisc_sleeping;
}
if (!q)
@ -817,7 +830,8 @@ replay:
q = dev->rx_queue.qdisc;
}
} else {
struct netdev_queue *dev_queue = &dev->tx_queue;
struct netdev_queue *dev_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
q = dev_queue->qdisc_sleeping;
}
@ -899,7 +913,7 @@ create_n_graft:
tcm->tcm_parent, tcm->tcm_parent,
tca, &err);
else
q = qdisc_create(dev, &dev->tx_queue,
q = qdisc_create(dev, netdev_get_tx_queue(dev, 0),
tcm->tcm_parent, tcm->tcm_handle,
tca, &err);
if (q == NULL) {
@ -1025,7 +1039,7 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
if (idx > s_idx)
s_q_idx = 0;
q_idx = 0;
dev_queue = &dev->tx_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
list_for_each_entry(q, &dev_queue->qdisc_list, list) {
if (q_idx < s_q_idx) {
q_idx++;
@ -1098,7 +1112,7 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
/* Step 1. Determine qdisc handle X:0 */
dev_queue = &dev->tx_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
if (pid != TC_H_ROOT) {
u32 qid1 = TC_H_MAJ(pid);
@ -1275,7 +1289,7 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
s_t = cb->args[0];
t = 0;
dev_queue = &dev->tx_queue;
dev_queue = netdev_get_tx_queue(dev, 0);
list_for_each_entry(q, &dev_queue->qdisc_list, list) {
if (t < s_t || !q->ops->cl_ops ||
(tcm->tcm_parent &&

178
net/sched/sch_generic.c
View File

@ -40,20 +40,30 @@
*/
void qdisc_lock_tree(struct net_device *dev)
__acquires(dev->tx_queue.lock)
__acquires(dev->rx_queue.lock)
{
spin_lock_bh(&dev->tx_queue.lock);
unsigned int i;
local_bh_disable();
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
spin_lock(&txq->lock);
}
spin_lock(&dev->rx_queue.lock);
}
EXPORT_SYMBOL(qdisc_lock_tree);
void qdisc_unlock_tree(struct net_device *dev)
__releases(dev->rx_queue.lock)
__releases(dev->tx_queue.lock)
{
unsigned int i;
spin_unlock(&dev->rx_queue.lock);
spin_unlock_bh(&dev->tx_queue.lock);
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
spin_unlock(&txq->lock);
}
local_bh_enable();
}
EXPORT_SYMBOL(qdisc_unlock_tree);
@ -212,22 +222,37 @@ void __qdisc_run(struct netdev_queue *txq)
static void dev_watchdog(unsigned long arg)
{
struct net_device *dev = (struct net_device *)arg;
struct netdev_queue *txq = &dev->tx_queue;
netif_tx_lock(dev);
if (txq->qdisc != &noop_qdisc) {
if (!qdisc_tx_is_noop(dev)) {
if (netif_device_present(dev) &&
netif_running(dev) &&
netif_carrier_ok(dev)) {
if (netif_queue_stopped(dev) &&
time_after(jiffies, dev->trans_start + dev->watchdog_timeo)) {
int some_queue_stopped = 0;
unsigned int i;
printk(KERN_INFO "NETDEV WATCHDOG: %s: transmit timed out\n",
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq;
txq = netdev_get_tx_queue(dev, i);
if (netif_tx_queue_stopped(txq)) {
some_queue_stopped = 1;
break;
}
}
if (some_queue_stopped &&
time_after(jiffies, (dev->trans_start +
dev->watchdog_timeo))) {
printk(KERN_INFO "NETDEV WATCHDOG: %s: "
"transmit timed out\n",
dev->name);
dev->tx_timeout(dev);
WARN_ON_ONCE(1);
}
if (!mod_timer(&dev->watchdog_timer, round_jiffies(jiffies + dev->watchdog_timeo)))
if (!mod_timer(&dev->watchdog_timer,
round_jiffies(jiffies +
dev->watchdog_timeo)))
dev_hold(dev);
}
}
@ -542,9 +567,55 @@ void qdisc_destroy(struct Qdisc *qdisc)
}
EXPORT_SYMBOL(qdisc_destroy);
static bool dev_all_qdisc_sleeping_noop(struct net_device *dev)
{
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
if (txq->qdisc_sleeping != &noop_qdisc)
return false;
}
return true;
}
static void attach_one_default_qdisc(struct net_device *dev,
struct netdev_queue *dev_queue,
void *_unused)
{
struct Qdisc *qdisc;
if (dev->tx_queue_len) {
qdisc = qdisc_create_dflt(dev, dev_queue,
&pfifo_fast_ops, TC_H_ROOT);
if (!qdisc) {
printk(KERN_INFO "%s: activation failed\n", dev->name);
return;
}
list_add_tail(&qdisc->list, &dev_queue->qdisc_list);
} else {
qdisc = &noqueue_qdisc;
}
dev_queue->qdisc_sleeping = qdisc;
}
static void transition_one_qdisc(struct net_device *dev,
struct netdev_queue *dev_queue,
void *_need_watchdog)
{
int *need_watchdog_p = _need_watchdog;
spin_lock_bh(&dev_queue->lock);
rcu_assign_pointer(dev_queue->qdisc, dev_queue->qdisc_sleeping);
if (dev_queue->qdisc != &noqueue_qdisc)
*need_watchdog_p = 1;
spin_unlock_bh(&dev_queue->lock);
}
void dev_activate(struct net_device *dev)
{
struct netdev_queue *txq = &dev->tx_queue;
int need_watchdog;
/* No queueing discipline is attached to device;
create default one i.e. pfifo_fast for devices,
@ -552,39 +623,27 @@ void dev_activate(struct net_device *dev)
virtual interfaces
*/
if (txq->qdisc_sleeping == &noop_qdisc) {
struct Qdisc *qdisc;
if (dev->tx_queue_len) {
qdisc = qdisc_create_dflt(dev, txq,
&pfifo_fast_ops,
TC_H_ROOT);
if (qdisc == NULL) {
printk(KERN_INFO "%s: activation failed\n", dev->name);
return;
}
list_add_tail(&qdisc->list, &txq->qdisc_list);
} else {
qdisc = &noqueue_qdisc;
}
txq->qdisc_sleeping = qdisc;
}
if (dev_all_qdisc_sleeping_noop(dev))
netdev_for_each_tx_queue(dev, attach_one_default_qdisc, NULL);
if (!netif_carrier_ok(dev))
/* Delay activation until next carrier-on event */
return;
spin_lock_bh(&txq->lock);
rcu_assign_pointer(txq->qdisc, txq->qdisc_sleeping);
if (txq->qdisc != &noqueue_qdisc) {
need_watchdog = 0;
netdev_for_each_tx_queue(dev, transition_one_qdisc, &need_watchdog);
if (need_watchdog) {
dev->trans_start = jiffies;
dev_watchdog_up(dev);
}
spin_unlock_bh(&txq->lock);
}
static void dev_deactivate_queue(struct netdev_queue *dev_queue,
struct Qdisc *qdisc_default)
static void dev_deactivate_queue(struct net_device *dev,
struct netdev_queue *dev_queue,
void *_qdisc_default)
{
struct Qdisc *qdisc_default = _qdisc_default;
struct Qdisc *qdisc;
struct sk_buff *skb;
@ -603,12 +662,35 @@ static void dev_deactivate_queue(struct netdev_queue *dev_queue,
kfree_skb(skb);
}
static bool some_qdisc_is_running(struct net_device *dev, int lock)
{
unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *dev_queue;
int val;
dev_queue = netdev_get_tx_queue(dev, i);
if (lock)
spin_lock_bh(&dev_queue->lock);
val = test_bit(__QUEUE_STATE_QDISC_RUNNING, &dev_queue->state);
if (lock)
spin_unlock_bh(&dev_queue->lock);
if (val)
return true;
}
return false;
}
void dev_deactivate(struct net_device *dev)
{
struct netdev_queue *dev_queue = &dev->tx_queue;
int running;
bool running;
dev_deactivate_queue(dev_queue, &noop_qdisc);
netdev_for_each_tx_queue(dev, dev_deactivate_queue, &noop_qdisc);
dev_watchdog_down(dev);
@ -617,17 +699,14 @@ void dev_deactivate(struct net_device *dev)
/* Wait for outstanding qdisc_run calls. */
do {
while (test_bit(__QUEUE_STATE_QDISC_RUNNING, &dev_queue->state))
while (some_qdisc_is_running(dev, 0))
yield();
/*
* Double-check inside queue lock to ensure that all effects
* of the queue run are visible when we return.
*/
spin_lock_bh(&dev_queue->lock);
running = test_bit(__QUEUE_STATE_QDISC_RUNNING,
&dev_queue->state);
spin_unlock_bh(&dev_queue->lock);
running = some_qdisc_is_running(dev, 1);
/*
* The running flag should never be set at this point because
@ -642,8 +721,10 @@ void dev_deactivate(struct net_device *dev)
static void dev_init_scheduler_queue(struct net_device *dev,
struct netdev_queue *dev_queue,
struct Qdisc *qdisc)
void *_qdisc)
{
struct Qdisc *qdisc = _qdisc;
dev_queue->qdisc = qdisc;
dev_queue->qdisc_sleeping = qdisc;
INIT_LIST_HEAD(&dev_queue->qdisc_list);
@ -652,18 +733,19 @@ static void dev_init_scheduler_queue(struct net_device *dev,
void dev_init_scheduler(struct net_device *dev)
{
qdisc_lock_tree(dev);
dev_init_scheduler_queue(dev, &dev->tx_queue, &noop_qdisc);
netdev_for_each_tx_queue(dev, dev_init_scheduler_queue, &noop_qdisc);
dev_init_scheduler_queue(dev, &dev->rx_queue, NULL);
qdisc_unlock_tree(dev);
setup_timer(&dev->watchdog_timer, dev_watchdog, (unsigned long)dev);
}
static void dev_shutdown_scheduler_queue(struct net_device *dev,
struct netdev_queue *dev_queue,
struct Qdisc *qdisc_default)
static void shutdown_scheduler_queue(struct net_device *dev,
struct netdev_queue *dev_queue,
void *_qdisc_default)
{
struct Qdisc *qdisc = dev_queue->qdisc_sleeping;
struct Qdisc *qdisc_default = _qdisc_default;
if (qdisc) {
dev_queue->qdisc = qdisc_default;
@ -676,8 +758,8 @@ static void dev_shutdown_scheduler_queue(struct net_device *dev,
void dev_shutdown(struct net_device *dev)
{
qdisc_lock_tree(dev);
dev_shutdown_scheduler_queue(dev, &dev->tx_queue, &noop_qdisc);
dev_shutdown_scheduler_queue(dev, &dev->rx_queue, NULL);
netdev_for_each_tx_queue(dev, shutdown_scheduler_queue, &noop_qdisc);
shutdown_scheduler_queue(dev, &dev->rx_queue, NULL);
BUG_TRAP(!timer_pending(&dev->watchdog_timer));
qdisc_unlock_tree(dev);
}

21
net/sched/sch_teql.c
View File

@ -111,7 +111,7 @@ teql_dequeue(struct Qdisc* sch)
struct sk_buff *skb;
skb = __skb_dequeue(&dat->q);
dat_queue = &dat->m->dev->tx_queue;
dat_queue = netdev_get_tx_queue(dat->m->dev, 0);
if (skb == NULL) {
struct net_device *m = qdisc_dev(dat_queue->qdisc);
if (m) {
@ -155,10 +155,13 @@ teql_destroy(struct Qdisc* sch)
if (q == master->slaves) {
master->slaves = NEXT_SLAVE(q);
if (q == master->slaves) {
struct netdev_queue *txq;
txq = netdev_get_tx_queue(master->dev, 0);
master->slaves = NULL;
spin_lock_bh(&master->dev->tx_queue.lock);
qdisc_reset(master->dev->tx_queue.qdisc);
spin_unlock_bh(&master->dev->tx_queue.lock);
spin_lock_bh(&txq->lock);
qdisc_reset(txq->qdisc);
spin_unlock_bh(&txq->lock);
}
}
skb_queue_purge(&dat->q);
@ -218,7 +221,8 @@ static int teql_qdisc_init(struct Qdisc *sch, struct nlattr *opt)
static int
__teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *dev)
{
struct teql_sched_data *q = qdisc_priv(dev->tx_queue.qdisc);
struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, 0);
struct teql_sched_data *q = qdisc_priv(dev_queue->qdisc);
struct neighbour *mn = skb->dst->neighbour;
struct neighbour *n = q->ncache;
@ -254,7 +258,8 @@ __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *
static inline int teql_resolve(struct sk_buff *skb,
struct sk_buff *skb_res, struct net_device *dev)
{
if (dev->tx_queue.qdisc == &noop_qdisc)
struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
if (txq->qdisc == &noop_qdisc)
return -ENODEV;
if (dev->header_ops == NULL ||
@ -285,8 +290,10 @@ restart:
do {
struct net_device *slave = qdisc_dev(q);
struct netdev_queue *slave_txq;
if (slave->tx_queue.qdisc_sleeping != q)
slave_txq = netdev_get_tx_queue(slave, 0);
if (slave_txq->qdisc_sleeping != q)
continue;
if (netif_queue_stopped(slave) ||
__netif_subqueue_stopped(slave, subq) ||