* 2 of the License, or (at your option) any later version.
*
* Derived from the non IP parts of dev.c 1.0.19
- * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Mark Evans, <evansmp@uhura.aston.ac.uk>
*
#include <asm/uaccess.h>
#include <asm/system.h>
-#include <asm/bitops.h>
-#include <linux/config.h>
+#include <linux/bitops.h>
+#include <linux/capability.h>
#include <linux/cpu.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <linux/mutex.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/if_bridge.h>
-#include <linux/divert.h>
#include <net/dst.h>
#include <net/pkt_sched.h>
#include <net/checksum.h>
#include <linux/kallsyms.h>
#include <linux/netpoll.h>
#include <linux/rcupdate.h>
-#ifdef CONFIG_NET_RADIO
-#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
+#include <linux/delay.h>
+#include <linux/wireless.h>
#include <net/iw_handler.h>
-#endif /* CONFIG_NET_RADIO */
#include <asm/current.h>
+#include <linux/audit.h>
+#include <linux/dmaengine.h>
+#include <linux/err.h>
+#include <linux/ctype.h>
+#include <linux/vs_context.h> /* remove with NXF_HIDE_NETIF */
#include <linux/vs_network.h>
-/* This define, if set, will randomly drop a packet when congestion
- * is more than moderate. It helps fairness in the multi-interface
- * case when one of them is a hog, but it kills performance for the
- * single interface case so it is off now by default.
- */
-#undef RAND_LIE
-
-/* Setting this will sample the queue lengths and thus congestion
- * via a timer instead of as each packet is received.
- */
-#undef OFFLINE_SAMPLE
+#ifdef CONFIG_XEN
+#include <net/ip.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#endif
/*
* The list of packet types we will receive (as opposed to discard)
* sure which should go first, but I bet it won't make much
* difference if we are running VLANs. The good news is that
* this protocol won't be in the list unless compiled in, so
- * the average user (w/out VLANs) will not be adversly affected.
+ * the average user (w/out VLANs) will not be adversely affected.
* --BLG
*
* 0800 IP
* 86DD IPv6
*/
-static spinlock_t ptype_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(ptype_lock);
static struct list_head ptype_base[16]; /* 16 way hashed list */
static struct list_head ptype_all; /* Taps */
-#ifdef OFFLINE_SAMPLE
-static void sample_queue(unsigned long dummy);
-static struct timer_list samp_timer = TIMER_INITIALIZER(sample_queue, 0, 0);
+#ifdef CONFIG_NET_DMA
+static struct dma_client *net_dma_client;
+static unsigned int net_dma_count;
+static spinlock_t net_dma_event_lock;
#endif
/*
- * The @dev_base list is protected by @dev_base_lock and the rtln
+ * The @dev_base list is protected by @dev_base_lock and the rtnl
* semaphore.
*
* Pure readers hold dev_base_lock for reading.
* semaphore held.
*/
struct net_device *dev_base;
-struct net_device **dev_tail = &dev_base;
-rwlock_t dev_base_lock = RW_LOCK_UNLOCKED;
+static struct net_device **dev_tail = &dev_base;
+DEFINE_RWLOCK(dev_base_lock);
EXPORT_SYMBOL(dev_base);
EXPORT_SYMBOL(dev_base_lock);
* Our notifier list
*/
-static struct notifier_block *netdev_chain;
+static RAW_NOTIFIER_HEAD(netdev_chain);
/*
* Device drivers call our routines to queue packets here. We empty the
* queue in the local softnet handler.
*/
-DEFINE_PER_CPU(struct softnet_data, softnet_data) = { 0, };
+DEFINE_PER_CPU(struct softnet_data, softnet_data) = { NULL };
#ifdef CONFIG_SYSFS
extern int netdev_sysfs_init(void);
* For efficiency
*/
-int netdev_nit;
+static int netdev_nit;
/*
* Add a protocol ID to the list. Now that the input handler is
spin_unlock_bh(&ptype_lock);
}
-extern void linkwatch_run_queue(void);
-
-
-
/**
* __dev_remove_pack - remove packet handler
* @pt: packet type declaration
* returns 0 on error and 1 on success. This is a generic routine to
* all netdevices.
*/
-int netdev_boot_setup_add(char *name, struct ifmap *map)
+static int netdev_boot_setup_add(char *name, struct ifmap *map)
{
struct netdev_boot_setup *s;
int i;
return dev;
}
-/*
- Return value is changed to int to prevent illegal usage in future.
- It is still legal to use to check for device existence.
-
- User should understand, that the result returned by this function
- is meaningless, if it was not issued under rtnl semaphore.
- */
-
-/**
- * dev_get - test if a device exists
- * @name: name to test for
- *
- * Test if a name exists. Returns true if the name is found. In order
- * to be sure the name is not allocated or removed during the test the
- * caller must hold the rtnl semaphore.
- *
- * This function exists only for back compatibility with older
- * drivers.
- */
-int __dev_get(const char *name)
-{
- struct net_device *dev;
-
- read_lock(&dev_base_lock);
- dev = __dev_get_by_name(name);
- read_unlock(&dev_base_lock);
- return dev != NULL;
-}
-
/**
* __dev_get_by_index - find a device by its ifindex
* @ifindex: index of device
return dev;
}
-struct net_device *__dev_getfirstbyhwtype(unsigned short type)
-{
- struct net_device *dev;
-
- for (dev = dev_base; dev; dev = dev->next)
- if (dev->type == type)
- break;
- return dev;
-}
-
-EXPORT_SYMBOL(__dev_getfirstbyhwtype);
+EXPORT_SYMBOL(dev_getbyhwaddr);
struct net_device *dev_getfirstbyhwtype(unsigned short type)
{
struct net_device *dev;
rtnl_lock();
- dev = __dev_getfirstbyhwtype(type);
- if (dev)
- dev_hold(dev);
+ for (dev = dev_base; dev; dev = dev->next) {
+ if (dev->type == type) {
+ dev_hold(dev);
+ break;
+ }
+ }
rtnl_unlock();
return dev;
}
struct net_device *dev;
read_lock(&dev_base_lock);
- dev = __dev_get_by_flags(if_flags, mask);
- if (dev)
- dev_hold(dev);
- read_unlock(&dev_base_lock);
- return dev;
-}
-
-/**
- * __dev_get_by_flags - find any device with given flags
- * @if_flags: IFF_* values
- * @mask: bitmask of bits in if_flags to check
- *
- * Search for any interface with the given flags. Returns NULL if a device
- * is not found or a pointer to the device. The caller must hold either
- * the RTNL semaphore or @dev_base_lock.
- */
-
-struct net_device *__dev_get_by_flags(unsigned short if_flags, unsigned short mask)
-{
- struct net_device *dev;
-
for (dev = dev_base; dev != NULL; dev = dev->next) {
- if (((dev->flags ^ if_flags) & mask) == 0)
- return dev;
+ if (((dev->flags ^ if_flags) & mask) == 0) {
+ dev_hold(dev);
+ break;
+ }
}
- return NULL;
+ read_unlock(&dev_base_lock);
+ return dev;
}
/**
* @name: name string
*
* Network device names need to be valid file names to
- * to allow sysfs to work
+ * to allow sysfs to work. We also disallow any kind of
+ * whitespace.
*/
int dev_valid_name(const char *name)
{
- return !(*name == '\0'
- || !strcmp(name, ".")
- || !strcmp(name, "..")
- || strchr(name, '/'));
+ if (*name == '\0')
+ return 0;
+ if (strlen(name) >= IFNAMSIZ)
+ return 0;
+ if (!strcmp(name, ".") || !strcmp(name, ".."))
+ return 0;
+
+ while (*name) {
+ if (*name == '/' || isspace(*name))
+ return 0;
+ name++;
+ }
+ return 1;
}
/**
* @name: name format string
*
* Passed a format string - eg "lt%d" it will try and find a suitable
- * id. Not efficient for many devices, not called a lot. The caller
- * must hold the dev_base or rtnl lock while allocating the name and
- * adding the device in order to avoid duplicates. Returns the number
- * of the unit assigned or a negative errno code.
+ * id. It scans list of devices to build up a free map, then chooses
+ * the first empty slot. The caller must hold the dev_base or rtnl lock
+ * while allocating the name and adding the device in order to avoid
+ * duplicates.
+ * Limited to bits_per_byte * page size devices (ie 32K on most platforms).
+ * Returns the number of the unit assigned or a negative errno code.
*/
int dev_alloc_name(struct net_device *dev, const char *name)
if (!err) {
hlist_del(&dev->name_hlist);
hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name));
- notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ raw_notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGENAME, dev);
}
return err;
}
+/**
+ * netdev_features_change - device changes features
+ * @dev: device to cause notification
+ *
+ * Called to indicate a device has changed features.
+ */
+void netdev_features_change(struct net_device *dev)
+{
+ raw_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev);
+}
+EXPORT_SYMBOL(netdev_features_change);
+
/**
* netdev_state_change - device changes state
* @dev: device to cause notification
void netdev_state_change(struct net_device *dev)
{
if (dev->flags & IFF_UP) {
- notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+ raw_notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGE, dev);
rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
}
}
}
-/*
- * Some old buggy device drivers change get_stats after registering
- * the device. Try and trap them here.
- * This can be elimnated when all devices are known fixed.
- */
-static inline int get_stats_changed(struct net_device *dev)
-{
- int changed = dev->last_stats != dev->get_stats;
- dev->last_stats = dev->get_stats;
- return changed;
-}
-
/**
* dev_open - prepare an interface for use.
* @dev: device to open
if (dev->flags & IFF_UP)
return 0;
- /*
- * Check for broken device drivers.
- */
- if (get_stats_changed(dev) && net_ratelimit()) {
- printk(KERN_ERR "%s: driver changed get_stats after register\n",
- dev->name);
- }
-
/*
* Is it even present?
*/
clear_bit(__LINK_STATE_START, &dev->state);
}
- /*
- * Check for more broken device drivers.
- */
- if (get_stats_changed(dev) && net_ratelimit()) {
- printk(KERN_ERR "%s: driver changed get_stats in open\n",
- dev->name);
- }
-
/*
* If it went open OK then:
*/
/*
* ... and announce new interface.
*/
- notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+ raw_notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
}
return ret;
}
* Tell people we are going down, so that they can
* prepare to death, when device is still operating.
*/
- notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+ raw_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
dev_deactivate(dev);
smp_mb__after_clear_bit(); /* Commit netif_running(). */
while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
/* No hurry. */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(1);
+ msleep(1);
}
/*
/*
* Tell people we are down
*/
- notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+ raw_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
return 0;
}
int err;
rtnl_lock();
- err = notifier_chain_register(&netdev_chain, nb);
+ err = raw_notifier_chain_register(&netdev_chain, nb);
if (!err) {
for (dev = dev_base; dev; dev = dev->next) {
nb->notifier_call(nb, NETDEV_REGISTER, dev);
int unregister_netdevice_notifier(struct notifier_block *nb)
{
- return notifier_chain_unregister(&netdev_chain, nb);
+ int err;
+
+ rtnl_lock();
+ err = raw_notifier_chain_unregister(&netdev_chain, nb);
+ rtnl_unlock();
+ return err;
}
/**
* @v: pointer passed unmodified to notifier function
*
* Call all network notifier blocks. Parameters and return value
- * are as for notifier_call_chain().
+ * are as for raw_notifier_call_chain().
*/
int call_netdevice_notifiers(unsigned long val, void *v)
{
- return notifier_call_chain(&netdev_chain, val, v);
+ return raw_notifier_call_chain(&netdev_chain, val, v);
+}
+
+/* When > 0 there are consumers of rx skb time stamps */
+static atomic_t netstamp_needed = ATOMIC_INIT(0);
+
+void net_enable_timestamp(void)
+{
+ atomic_inc(&netstamp_needed);
+}
+
+void net_disable_timestamp(void)
+{
+ atomic_dec(&netstamp_needed);
+}
+
+void __net_timestamp(struct sk_buff *skb)
+{
+ struct timeval tv;
+
+ do_gettimeofday(&tv);
+ skb_set_timestamp(skb, &tv);
+}
+EXPORT_SYMBOL(__net_timestamp);
+
+static inline void net_timestamp(struct sk_buff *skb)
+{
+ if (atomic_read(&netstamp_needed))
+ __net_timestamp(skb);
+ else {
+ skb->tstamp.off_sec = 0;
+ skb->tstamp.off_usec = 0;
+ }
}
/*
* taps currently in use.
*/
-void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
+static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
{
struct packet_type *ptype;
- net_timestamp(&skb->stamp);
+
+ net_timestamp(skb);
rcu_read_lock();
list_for_each_entry_rcu(ptype, &ptype_all, list) {
skb2->h.raw = skb2->nh.raw;
skb2->pkt_type = PACKET_OUTGOING;
- ptype->func(skb2, skb->dev, ptype);
+ ptype->func(skb2, skb->dev, ptype, skb->dev);
}
}
rcu_read_unlock();
}
+
+void __netif_schedule(struct net_device *dev)
+{
+ if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
+ unsigned long flags;
+ struct softnet_data *sd;
+
+ local_irq_save(flags);
+ sd = &__get_cpu_var(softnet_data);
+ dev->next_sched = sd->output_queue;
+ sd->output_queue = dev;
+ raise_softirq_irqoff(NET_TX_SOFTIRQ);
+ local_irq_restore(flags);
+ }
+}
+EXPORT_SYMBOL(__netif_schedule);
+
+void __netif_rx_schedule(struct net_device *dev)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ dev_hold(dev);
+ list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
+ if (dev->quota < 0)
+ dev->quota += dev->weight;
+ else
+ dev->quota = dev->weight;
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ local_irq_restore(flags);
+}
+EXPORT_SYMBOL(__netif_rx_schedule);
+
+void dev_kfree_skb_any(struct sk_buff *skb)
+{
+ if (in_irq() || irqs_disabled())
+ dev_kfree_skb_irq(skb);
+ else
+ dev_kfree_skb(skb);
+}
+EXPORT_SYMBOL(dev_kfree_skb_any);
+
+
+/* Hot-plugging. */
+void netif_device_detach(struct net_device *dev)
+{
+ if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
+ netif_running(dev)) {
+ netif_stop_queue(dev);
+ }
+}
+EXPORT_SYMBOL(netif_device_detach);
+
+void netif_device_attach(struct net_device *dev)
+{
+ if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
+ netif_running(dev)) {
+ netif_wake_queue(dev);
+ __netdev_watchdog_up(dev);
+ }
+}
+EXPORT_SYMBOL(netif_device_attach);
+
+
/*
* Invalidate hardware checksum when packet is to be mangled, and
* complete checksum manually on outgoing path.
*/
-int skb_checksum_help(struct sk_buff **pskb, int inward)
+int skb_checksum_help(struct sk_buff *skb)
{
- unsigned int csum;
- int ret = 0, offset = (*pskb)->h.raw - (*pskb)->data;
+ __wsum csum;
+ int ret = 0, offset = skb->h.raw - skb->data;
- if (inward) {
- (*pskb)->ip_summed = CHECKSUM_NONE;
- goto out;
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ goto out_set_summed;
+
+ if (unlikely(skb_shinfo(skb)->gso_size)) {
+ /* Let GSO fix up the checksum. */
+ goto out_set_summed;
}
- if (skb_shared(*pskb) || skb_cloned(*pskb)) {
- struct sk_buff *newskb = skb_copy(*pskb, GFP_ATOMIC);
- if (!newskb) {
- ret = -ENOMEM;
+ if (skb_cloned(skb)) {
+ ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+ if (ret)
goto out;
- }
- if ((*pskb)->sk)
- skb_set_owner_w(newskb, (*pskb)->sk);
- kfree_skb(*pskb);
- *pskb = newskb;
}
- if (offset > (int)(*pskb)->len)
- BUG();
- csum = skb_checksum(*pskb, offset, (*pskb)->len-offset, 0);
+ BUG_ON(offset > (int)skb->len);
+ csum = skb_checksum(skb, offset, skb->len-offset, 0);
+
+ offset = skb->tail - skb->h.raw;
+ BUG_ON(offset <= 0);
+ BUG_ON(skb->csum_offset + 2 > offset);
- offset = (*pskb)->tail - (*pskb)->h.raw;
- if (offset <= 0)
- BUG();
- if ((*pskb)->csum + 2 > offset)
- BUG();
+ *(__sum16*)(skb->h.raw + skb->csum_offset) = csum_fold(csum);
- *(u16*)((*pskb)->h.raw + (*pskb)->csum) = csum_fold(csum);
- (*pskb)->ip_summed = CHECKSUM_NONE;
+out_set_summed:
+ skb->ip_summed = CHECKSUM_NONE;
out:
return ret;
}
-#ifdef CONFIG_HIGHMEM
+/**
+ * skb_gso_segment - Perform segmentation on skb.
+ * @skb: buffer to segment
+ * @features: features for the output path (see dev->features)
+ *
+ * This function segments the given skb and returns a list of segments.
+ *
+ * It may return NULL if the skb requires no segmentation. This is
+ * only possible when GSO is used for verifying header integrity.
+ */
+struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
+{
+ struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT);
+ struct packet_type *ptype;
+ __be16 type = skb->protocol;
+ int err;
+
+ BUG_ON(skb_shinfo(skb)->frag_list);
+
+ skb->mac.raw = skb->data;
+ skb->mac_len = skb->nh.raw - skb->data;
+ __skb_pull(skb, skb->mac_len);
+
+ if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
+ if (skb_header_cloned(skb) &&
+ (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
+ return ERR_PTR(err);
+ }
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & 15], list) {
+ if (ptype->type == type && !ptype->dev && ptype->gso_segment) {
+ if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
+ err = ptype->gso_send_check(skb);
+ segs = ERR_PTR(err);
+ if (err || skb_gso_ok(skb, features))
+ break;
+ __skb_push(skb, skb->data - skb->nh.raw);
+ }
+ segs = ptype->gso_segment(skb, features);
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ __skb_push(skb, skb->data - skb->mac.raw);
+
+ return segs;
+}
+
+EXPORT_SYMBOL(skb_gso_segment);
+
+/* Take action when hardware reception checksum errors are detected. */
+#ifdef CONFIG_BUG
+void netdev_rx_csum_fault(struct net_device *dev)
+{
+ if (net_ratelimit()) {
+ printk(KERN_ERR "%s: hw csum failure.\n",
+ dev ? dev->name : "<unknown>");
+ dump_stack();
+ }
+}
+EXPORT_SYMBOL(netdev_rx_csum_fault);
+#endif
+
/* Actually, we should eliminate this check as soon as we know, that:
* 1. IOMMU is present and allows to map all the memory.
* 2. No high memory really exists on this machine.
static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
{
+#ifdef CONFIG_HIGHMEM
int i;
if (dev->features & NETIF_F_HIGHDMA)
return 0;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- if (skb_shinfo(skb)->frags[i].page >= highmem_start_page)
+ if (PageHighMem(skb_shinfo(skb)->frags[i].page))
return 1;
+#endif
return 0;
}
-#else
-#define illegal_highdma(dev, skb) (0)
-#endif
-extern void skb_release_data(struct sk_buff *);
+struct dev_gso_cb {
+ void (*destructor)(struct sk_buff *skb);
+};
+
+#define DEV_GSO_CB(skb) ((struct dev_gso_cb *)(skb)->cb)
-/* Keep head the same: replace data */
-int __skb_linearize(struct sk_buff *skb, int gfp_mask)
+static void dev_gso_skb_destructor(struct sk_buff *skb)
{
- unsigned int size;
- u8 *data;
- long offset;
- struct skb_shared_info *ninfo;
- int headerlen = skb->data - skb->head;
- int expand = (skb->tail + skb->data_len) - skb->end;
+ struct dev_gso_cb *cb;
- if (skb_shared(skb))
- BUG();
+ do {
+ struct sk_buff *nskb = skb->next;
- if (expand <= 0)
- expand = 0;
+ skb->next = nskb->next;
+ nskb->next = NULL;
+ kfree_skb(nskb);
+ } while (skb->next);
- size = skb->end - skb->head + expand;
- size = SKB_DATA_ALIGN(size);
- data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
- if (!data)
- return -ENOMEM;
+ cb = DEV_GSO_CB(skb);
+ if (cb->destructor)
+ cb->destructor(skb);
+}
- /* Copy entire thing */
- if (skb_copy_bits(skb, -headerlen, data, headerlen + skb->len))
- BUG();
+/**
+ * dev_gso_segment - Perform emulated hardware segmentation on skb.
+ * @skb: buffer to segment
+ *
+ * This function segments the given skb and stores the list of segments
+ * in skb->next.
+ */
+static int dev_gso_segment(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ struct sk_buff *segs;
+ int features = dev->features & ~(illegal_highdma(dev, skb) ?
+ NETIF_F_SG : 0);
+
+ segs = skb_gso_segment(skb, features);
+
+ /* Verifying header integrity only. */
+ if (!segs)
+ return 0;
+
+ if (unlikely(IS_ERR(segs)))
+ return PTR_ERR(segs);
- /* Set up shinfo */
- ninfo = (struct skb_shared_info*)(data + size);
- atomic_set(&ninfo->dataref, 1);
- ninfo->tso_size = skb_shinfo(skb)->tso_size;
- ninfo->tso_segs = skb_shinfo(skb)->tso_segs;
- ninfo->nr_frags = 0;
- ninfo->frag_list = NULL;
+ skb->next = segs;
+ DEV_GSO_CB(skb)->destructor = skb->destructor;
+ skb->destructor = dev_gso_skb_destructor;
+
+ return 0;
+}
- /* Offset between the two in bytes */
- offset = data - skb->head;
+int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ if (likely(!skb->next)) {
+ if (netdev_nit)
+ dev_queue_xmit_nit(skb, dev);
- /* Free old data. */
- skb_release_data(skb);
+ if (netif_needs_gso(dev, skb)) {
+ if (unlikely(dev_gso_segment(skb)))
+ goto out_kfree_skb;
+ if (skb->next)
+ goto gso;
+ }
- skb->head = data;
- skb->end = data + size;
+ return dev->hard_start_xmit(skb, dev);
+ }
- /* Set up new pointers */
- skb->h.raw += offset;
- skb->nh.raw += offset;
- skb->mac.raw += offset;
- skb->tail += offset;
- skb->data += offset;
+gso:
+ do {
+ struct sk_buff *nskb = skb->next;
+ int rc;
- /* We are no longer a clone, even if we were. */
- skb->cloned = 0;
+ skb->next = nskb->next;
+ nskb->next = NULL;
+ rc = dev->hard_start_xmit(nskb, dev);
+ if (unlikely(rc)) {
+ nskb->next = skb->next;
+ skb->next = nskb;
+ return rc;
+ }
+ if (unlikely(netif_queue_stopped(dev) && skb->next))
+ return NETDEV_TX_BUSY;
+ } while (skb->next);
+
+ skb->destructor = DEV_GSO_CB(skb)->destructor;
- skb->tail += skb->data_len;
- skb->data_len = 0;
+out_kfree_skb:
+ kfree_skb(skb);
return 0;
}
-#define HARD_TX_LOCK_BH(dev, cpu) { \
+#define HARD_TX_LOCK(dev, cpu) { \
if ((dev->features & NETIF_F_LLTX) == 0) { \
- spin_lock_bh(&dev->xmit_lock); \
- dev->xmit_lock_owner = cpu; \
+ netif_tx_lock(dev); \
} \
}
-#define HARD_TX_UNLOCK_BH(dev) { \
+#define HARD_TX_UNLOCK(dev) { \
if ((dev->features & NETIF_F_LLTX) == 0) { \
- dev->xmit_lock_owner = -1; \
- spin_unlock_bh(&dev->xmit_lock); \
+ netif_tx_unlock(dev); \
} \
}
-static inline void qdisc_run(struct net_device *dev)
+#ifdef CONFIG_XEN
+inline int skb_checksum_setup(struct sk_buff *skb)
{
- while (!netif_queue_stopped(dev) &&
- qdisc_restart(dev)<0)
- /* NOTHING */;
+ if (skb->proto_csum_blank) {
+ if (skb->protocol != htons(ETH_P_IP))
+ goto out;
+ skb->h.raw = (unsigned char *)skb->nh.iph + 4*skb->nh.iph->ihl;
+ if (skb->h.raw >= skb->tail)
+ goto out;
+ switch (skb->nh.iph->protocol) {
+ case IPPROTO_TCP:
+ skb->csum = offsetof(struct tcphdr, check);
+ break;
+ case IPPROTO_UDP:
+ skb->csum = offsetof(struct udphdr, check);
+ break;
+ default:
+ if (net_ratelimit())
+ printk(KERN_ERR "Attempting to checksum a non-"
+ "TCP/UDP packet, dropping a protocol"
+ " %d packet", skb->nh.iph->protocol);
+ goto out;
+ }
+ if ((skb->h.raw + skb->csum + 2) > skb->tail)
+ goto out;
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->proto_csum_blank = 0;
+ }
+ return 0;
+out:
+ return -EPROTO;
}
+#else
+inline int skb_checksum_setup(struct sk_buff *skb) { return 0; }
+#endif
+
/**
* dev_queue_xmit - transmit a buffer
* A negative errno code is returned on a failure. A success does not
* guarantee the frame will be transmitted as it may be dropped due
* to congestion or traffic shaping.
+ *
+ * -----------------------------------------------------------------------------------
+ * I notice this method can also return errors from the queue disciplines,
+ * including NET_XMIT_DROP, which is a positive value. So, errors can also
+ * be positive.
+ *
+ * Regardless of the return value, the skb is consumed, so it is currently
+ * difficult to retry a send to this method. (You can bump the ref count
+ * before sending to hold a reference for retry if you are careful.)
+ *
+ * When calling this method, interrupts MUST be enabled. This is because
+ * the BH enable code must have IRQs enabled so that it will not deadlock.
+ * --BLG
*/
int dev_queue_xmit(struct sk_buff *skb)
struct Qdisc *q;
int rc = -ENOMEM;
+ /* If a checksum-deferred packet is forwarded to a device that needs a
+ * checksum, correct the pointers and force checksumming.
+ */
+ if (skb_checksum_setup(skb))
+ goto out_kfree_skb;
+
+ /* GSO will handle the following emulations directly. */
+ if (netif_needs_gso(dev, skb))
+ goto gso;
+
if (skb_shinfo(skb)->frag_list &&
!(dev->features & NETIF_F_FRAGLIST) &&
- __skb_linearize(skb, GFP_ATOMIC))
+ __skb_linearize(skb))
goto out_kfree_skb;
/* Fragmented skb is linearized if device does not support SG,
*/
if (skb_shinfo(skb)->nr_frags &&
(!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) &&
- __skb_linearize(skb, GFP_ATOMIC))
+ __skb_linearize(skb))
goto out_kfree_skb;
/* If packet is not checksummed and device does not support
* checksumming for this protocol, complete checksumming here.
*/
- if (skb->ip_summed == CHECKSUM_HW &&
- (!(dev->features & (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM)) &&
+ if (skb->ip_summed == CHECKSUM_PARTIAL &&
+ (!(dev->features & NETIF_F_GEN_CSUM) &&
(!(dev->features & NETIF_F_IP_CSUM) ||
skb->protocol != htons(ETH_P_IP))))
- if (skb_checksum_help(&skb, 0))
+ if (skb_checksum_help(skb))
goto out_kfree_skb;
- rcu_read_lock();
+gso:
+ spin_lock_prefetch(&dev->queue_lock);
+
+ /* Disable soft irqs for various locks below. Also
+ * stops preemption for RCU.
+ */
+ rcu_read_lock_bh();
+
/* Updates of qdisc are serialized by queue_lock.
* The struct Qdisc which is pointed to by qdisc is now a
* rcu structure - it may be accessed without acquiring
* also serializes access to the device queue.
*/
- q = dev->qdisc;
- smp_read_barrier_depends();
+ q = rcu_dereference(dev->qdisc);
#ifdef CONFIG_NET_CLS_ACT
skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_EGRESS);
#endif
if (q->enqueue) {
/* Grab device queue */
- spin_lock_bh(&dev->queue_lock);
-
- rc = q->enqueue(skb, q);
-
- qdisc_run(dev);
-
- spin_unlock_bh(&dev->queue_lock);
- rcu_read_unlock();
- rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc;
- goto out;
+ spin_lock(&dev->queue_lock);
+ q = dev->qdisc;
+ if (q->enqueue) {
+ rc = q->enqueue(skb, q);
+ qdisc_run(dev);
+ spin_unlock(&dev->queue_lock);
+
+ rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc;
+ goto out;
+ }
+ spin_unlock(&dev->queue_lock);
}
- rcu_read_unlock();
/* The device has no queue. Common case for software devices:
loopback, all the sorts of tunnels...
- Really, it is unlikely that xmit_lock protection is necessary here.
- (f.e. loopback and IP tunnels are clean ignoring statistics
+ Really, it is unlikely that netif_tx_lock protection is necessary
+ here. (f.e. loopback and IP tunnels are clean ignoring statistics
counters.)
However, it is possible, that they rely on protection
made by us here.
Either shot noqueue qdisc, it is even simpler 8)
*/
if (dev->flags & IFF_UP) {
- int cpu = get_cpu();
+ int cpu = smp_processor_id(); /* ok because BHs are off */
if (dev->xmit_lock_owner != cpu) {
- HARD_TX_LOCK_BH(dev, cpu);
- put_cpu();
+ HARD_TX_LOCK(dev, cpu);
if (!netif_queue_stopped(dev)) {
- if (netdev_nit)
- dev_queue_xmit_nit(skb, dev);
-
rc = 0;
- if (!dev->hard_start_xmit(skb, dev)) {
- HARD_TX_UNLOCK_BH(dev);
+ if (!dev_hard_start_xmit(skb, dev)) {
+ HARD_TX_UNLOCK(dev);
goto out;
}
}
- HARD_TX_UNLOCK_BH(dev);
+ HARD_TX_UNLOCK(dev);
if (net_ratelimit())
printk(KERN_CRIT "Virtual device %s asks to "
"queue packet!\n", dev->name);
- goto out_enetdown;
} else {
- put_cpu();
/* Recursion is detected! It is possible,
* unfortunately */
if (net_ratelimit())
"%s, fix it urgently!\n", dev->name);
}
}
-out_enetdown:
+
rc = -ENETDOWN;
+ rcu_read_unlock_bh();
+
out_kfree_skb:
kfree_skb(skb);
+ return rc;
out:
+ rcu_read_unlock_bh();
return rc;
}
Receiver routines
=======================================================================*/
-int netdev_max_backlog = 300;
+int netdev_max_backlog = 1000;
+int netdev_budget = 300;
int weight_p = 64; /* old backlog weight */
-/* These numbers are selected based on intuition and some
- * experimentatiom, if you have more scientific way of doing this
- * please go ahead and fix things.
- */
-int no_cong_thresh = 10;
-int no_cong = 20;
-int lo_cong = 100;
-int mod_cong = 290;
DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, };
-#ifdef CONFIG_NET_HW_FLOWCONTROL
-atomic_t netdev_dropping = ATOMIC_INIT(0);
-static unsigned long netdev_fc_mask = 1;
-unsigned long netdev_fc_xoff;
-spinlock_t netdev_fc_lock = SPIN_LOCK_UNLOCKED;
-
-static struct
-{
- void (*stimul)(struct net_device *);
- struct net_device *dev;
-} netdev_fc_slots[BITS_PER_LONG];
-
-int netdev_register_fc(struct net_device *dev,
- void (*stimul)(struct net_device *dev))
-{
- int bit = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&netdev_fc_lock, flags);
- if (netdev_fc_mask != ~0UL) {
- bit = ffz(netdev_fc_mask);
- netdev_fc_slots[bit].stimul = stimul;
- netdev_fc_slots[bit].dev = dev;
- set_bit(bit, &netdev_fc_mask);
- clear_bit(bit, &netdev_fc_xoff);
- }
- spin_unlock_irqrestore(&netdev_fc_lock, flags);
- return bit;
-}
-
-void netdev_unregister_fc(int bit)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&netdev_fc_lock, flags);
- if (bit > 0) {
- netdev_fc_slots[bit].stimul = NULL;
- netdev_fc_slots[bit].dev = NULL;
- clear_bit(bit, &netdev_fc_mask);
- clear_bit(bit, &netdev_fc_xoff);
- }
- spin_unlock_irqrestore(&netdev_fc_lock, flags);
-}
-
-static void netdev_wakeup(void)
-{
- unsigned long xoff;
-
- spin_lock(&netdev_fc_lock);
- xoff = netdev_fc_xoff;
- netdev_fc_xoff = 0;
- while (xoff) {
- int i = ffz(~xoff);
- xoff &= ~(1 << i);
- netdev_fc_slots[i].stimul(netdev_fc_slots[i].dev);
- }
- spin_unlock(&netdev_fc_lock);
-}
-#endif
-
-static void get_sample_stats(int cpu)
-{
-#ifdef RAND_LIE
- unsigned long rd;
- int rq;
-#endif
- struct softnet_data *sd = &per_cpu(softnet_data, cpu);
- int blog = sd->input_pkt_queue.qlen;
- int avg_blog = sd->avg_blog;
-
- avg_blog = (avg_blog >> 1) + (blog >> 1);
-
- if (avg_blog > mod_cong) {
- /* Above moderate congestion levels. */
- sd->cng_level = NET_RX_CN_HIGH;
-#ifdef RAND_LIE
- rd = net_random();
- rq = rd % netdev_max_backlog;
- if (rq < avg_blog) /* unlucky bastard */
- sd->cng_level = NET_RX_DROP;
-#endif
- } else if (avg_blog > lo_cong) {
- sd->cng_level = NET_RX_CN_MOD;
-#ifdef RAND_LIE
- rd = net_random();
- rq = rd % netdev_max_backlog;
- if (rq < avg_blog) /* unlucky bastard */
- sd->cng_level = NET_RX_CN_HIGH;
-#endif
- } else if (avg_blog > no_cong)
- sd->cng_level = NET_RX_CN_LOW;
- else /* no congestion */
- sd->cng_level = NET_RX_SUCCESS;
-
- sd->avg_blog = avg_blog;
-}
-
-#ifdef OFFLINE_SAMPLE
-static void sample_queue(unsigned long dummy)
-{
-/* 10 ms 0r 1ms -- i don't care -- JHS */
- int next_tick = 1;
- int cpu = smp_processor_id();
-
- get_sample_stats(cpu);
- next_tick += jiffies;
- mod_timer(&samp_timer, next_tick);
-}
-#endif
-
-
/**
* netif_rx - post buffer to the network code
* @skb: buffer to post
int netif_rx(struct sk_buff *skb)
{
- int this_cpu;
struct softnet_data *queue;
unsigned long flags;
-#ifdef CONFIG_NETPOLL_RX
- if (skb->dev->netpoll_rx && netpoll_rx(skb)) {
- kfree_skb(skb);
+ /* if netpoll wants it, pretend we never saw it */
+ if (netpoll_rx(skb))
return NET_RX_DROP;
- }
-#endif
-
- if (!skb->stamp.tv_sec)
- net_timestamp(&skb->stamp);
+
+ if (!skb->tstamp.off_sec)
+ net_timestamp(skb);
/*
* The code is rearranged so that the path is the most
* short when CPU is congested, but is still operating.
*/
local_irq_save(flags);
- this_cpu = smp_processor_id();
queue = &__get_cpu_var(softnet_data);
__get_cpu_var(netdev_rx_stat).total++;
if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
if (queue->input_pkt_queue.qlen) {
- if (queue->throttle)
- goto drop;
-
enqueue:
dev_hold(skb->dev);
__skb_queue_tail(&queue->input_pkt_queue, skb);
-#ifndef OFFLINE_SAMPLE
- get_sample_stats(this_cpu);
-#endif
local_irq_restore(flags);
- return queue->cng_level;
- }
-
- if (queue->throttle) {
- queue->throttle = 0;
-#ifdef CONFIG_NET_HW_FLOWCONTROL
- if (atomic_dec_and_test(&netdev_dropping))
- netdev_wakeup();
-#endif
+ return NET_RX_SUCCESS;
}
netif_rx_schedule(&queue->backlog_dev);
goto enqueue;
}
- if (!queue->throttle) {
- queue->throttle = 1;
- __get_cpu_var(netdev_rx_stat).throttled++;
-#ifdef CONFIG_NET_HW_FLOWCONTROL
- atomic_inc(&netdev_dropping);
-#endif
- }
-
-drop:
__get_cpu_var(netdev_rx_stat).dropped++;
local_irq_restore(flags);
return NET_RX_DROP;
}
-static __inline__ void skb_bond(struct sk_buff *skb)
+int netif_rx_ni(struct sk_buff *skb)
+{
+ int err;
+
+ preempt_disable();
+ err = netif_rx(skb);
+ if (local_softirq_pending())
+ do_softirq();
+ preempt_enable();
+
+ return err;
+}
+
+EXPORT_SYMBOL(netif_rx_ni);
+
+static inline struct net_device *skb_bond(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
if (dev->master) {
- skb->real_dev = skb->dev;
+ if (skb_bond_should_drop(skb)) {
+ kfree_skb(skb);
+ return NULL;
+ }
skb->dev = dev->master;
}
+
+ return dev;
}
static void net_tx_action(struct softirq_action *h)
}
static __inline__ int deliver_skb(struct sk_buff *skb,
- struct packet_type *pt_prev, int last)
+ struct packet_type *pt_prev,
+ struct net_device *orig_dev)
{
atomic_inc(&skb->users);
- return pt_prev->func(skb, skb->dev, pt_prev);
+ return pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
}
-
#if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE)
-int (*br_handle_frame_hook)(struct sk_buff *skb);
+int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb);
+struct net_bridge;
+struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
+ unsigned char *addr);
+void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
-static __inline__ int handle_bridge(struct sk_buff *skb,
- struct packet_type *pt_prev)
+static __inline__ int handle_bridge(struct sk_buff **pskb,
+ struct packet_type **pt_prev, int *ret,
+ struct net_device *orig_dev)
{
- int ret = NET_RX_DROP;
- if (pt_prev)
- ret = deliver_skb(skb, pt_prev, 0);
+ struct net_bridge_port *port;
- return ret;
-}
-
-#endif
-
-static inline int __handle_bridge(struct sk_buff *skb,
- struct packet_type **pt_prev, int *ret)
-{
-#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
- if (skb->dev->br_port && skb->pkt_type != PACKET_LOOPBACK) {
- *ret = handle_bridge(skb, *pt_prev);
- if (br_handle_frame_hook(skb) == 0)
- return 1;
+ if ((*pskb)->pkt_type == PACKET_LOOPBACK ||
+ (port = rcu_dereference((*pskb)->dev->br_port)) == NULL)
+ return 0;
+ if (*pt_prev) {
+ *ret = deliver_skb(*pskb, *pt_prev, orig_dev);
*pt_prev = NULL;
- }
-#endif
- return 0;
+ }
+
+ return br_handle_frame_hook(port, pskb);
}
-
+#else
+#define handle_bridge(skb, pt_prev, ret, orig_dev) (0)
+#endif
#ifdef CONFIG_NET_CLS_ACT
/* TODO: Maybe we should just force sch_ingress to be compiled in
* the ingress scheduler, you just cant add policies on ingress.
*
*/
-int ing_filter(struct sk_buff *skb)
+static int ing_filter(struct sk_buff *skb)
{
struct Qdisc *q;
struct net_device *dev = skb->dev;
if (dev->qdisc_ingress) {
__u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd);
if (MAX_RED_LOOP < ttl++) {
- printk("Redir loop detected Dropping packet (%s->%s)\n",
- skb->input_dev?skb->input_dev->name:"??",skb->dev->name);
+ printk(KERN_WARNING "Redir loop detected Dropping packet (%d->%d)\n",
+ skb->iif, skb->dev->ifindex);
return TC_ACT_SHOT;
}
skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl);
skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS);
- if (NULL == skb->input_dev) {
- skb->input_dev = skb->dev;
- printk("ing_filter: fixed %s out %s\n",skb->input_dev->name,skb->dev->name);
- }
- spin_lock(&dev->ingress_lock);
+
+ spin_lock(&dev->queue_lock);
if ((q = dev->qdisc_ingress) != NULL)
result = q->enqueue(skb, q);
- spin_unlock(&dev->ingress_lock);
+ spin_unlock(&dev->queue_lock);
}
int netif_receive_skb(struct sk_buff *skb)
{
struct packet_type *ptype, *pt_prev;
+ struct net_device *orig_dev;
int ret = NET_RX_DROP;
- unsigned short type;
+ __be16 type;
-#ifdef CONFIG_NETPOLL_RX
- if (skb->dev->netpoll_rx && skb->dev->poll && netpoll_rx(skb)) {
- kfree_skb(skb);
+ /* if we've gotten here through NAPI, check netpoll */
+ if (skb->dev->poll && netpoll_rx(skb))
return NET_RX_DROP;
- }
-#endif
- if (!skb->stamp.tv_sec)
- net_timestamp(&skb->stamp);
+ if (!skb->tstamp.off_sec)
+ net_timestamp(skb);
- skb_bond(skb);
+ if (!skb->iif)
+ skb->iif = skb->dev->ifindex;
+
+ orig_dev = skb_bond(skb);
+
+ if (!orig_dev)
+ return NET_RX_DROP;
__get_cpu_var(netdev_rx_stat).total++;
skb->mac_len = skb->nh.raw - skb->mac.raw;
pt_prev = NULL;
+
+ rcu_read_lock();
+
#ifdef CONFIG_NET_CLS_ACT
if (skb->tc_verd & TC_NCLS) {
skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
- rcu_read_lock();
goto ncls;
}
- #endif
+#endif
+
+#ifdef CONFIG_XEN
+ switch (skb->ip_summed) {
+ case CHECKSUM_UNNECESSARY:
+ skb->proto_data_valid = 1;
+ break;
+ case CHECKSUM_PARTIAL:
+ /* XXX Implement me. */
+ default:
+ skb->proto_data_valid = 0;
+ break;
+ }
+#endif
- rcu_read_lock();
list_for_each_entry_rcu(ptype, &ptype_all, list) {
if (!ptype->dev || ptype->dev == skb->dev) {
if (pt_prev)
- ret = deliver_skb(skb, pt_prev, 0);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
}
}
#ifdef CONFIG_NET_CLS_ACT
if (pt_prev) {
- atomic_inc(&skb->users);
- ret = pt_prev->func(skb, skb->dev, pt_prev);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = NULL; /* noone else should process this after*/
} else {
skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
ncls:
#endif
- handle_diverter(skb);
-
- if (__handle_bridge(skb, &pt_prev, &ret))
+ if (handle_bridge(&skb, &pt_prev, &ret, orig_dev))
goto out;
type = skb->protocol;
if (ptype->type == type &&
(!ptype->dev || ptype->dev == skb->dev)) {
if (pt_prev)
- ret = deliver_skb(skb, pt_prev, 0);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
}
}
if (pt_prev) {
- ret = pt_prev->func(skb, skb->dev, pt_prev);
+ ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
} else {
kfree_skb(skb);
/* Jamal, now you will not able to escape explaining
struct softnet_data *queue = &__get_cpu_var(softnet_data);
unsigned long start_time = jiffies;
+ backlog_dev->weight = weight_p;
for (;;) {
struct sk_buff *skb;
struct net_device *dev;
if (work >= quota || jiffies - start_time > 1)
break;
-#ifdef CONFIG_NET_HW_FLOWCONTROL
- if (queue->throttle &&
- queue->input_pkt_queue.qlen < no_cong_thresh ) {
- queue->throttle = 0;
- if (atomic_dec_and_test(&netdev_dropping)) {
- netdev_wakeup();
- break;
- }
- }
-#endif
}
backlog_dev->quota -= work;
smp_mb__before_clear_bit();
netif_poll_enable(backlog_dev);
- if (queue->throttle) {
- queue->throttle = 0;
-#ifdef CONFIG_NET_HW_FLOWCONTROL
- if (atomic_dec_and_test(&netdev_dropping))
- netdev_wakeup();
-#endif
- }
local_irq_enable();
return 0;
}
{
struct softnet_data *queue = &__get_cpu_var(softnet_data);
unsigned long start_time = jiffies;
- int budget = netdev_max_backlog;
+ int budget = netdev_budget;
+ void *have;
-
local_irq_disable();
while (!list_empty(&queue->poll_list)) {
dev = list_entry(queue->poll_list.next,
struct net_device, poll_list);
+ have = netpoll_poll_lock(dev);
if (dev->quota <= 0 || dev->poll(dev, &budget)) {
+ netpoll_poll_unlock(have);
local_irq_disable();
- list_del(&dev->poll_list);
- list_add_tail(&dev->poll_list, &queue->poll_list);
+ list_move_tail(&dev->poll_list, &queue->poll_list);
if (dev->quota < 0)
dev->quota += dev->weight;
else
dev->quota = dev->weight;
} else {
+ netpoll_poll_unlock(have);
dev_put(dev);
local_irq_disable();
}
}
out:
+#ifdef CONFIG_NET_DMA
+ /*
+ * There may not be any more sk_buffs coming right now, so push
+ * any pending DMA copies to hardware
+ */
+ if (net_dma_client) {
+ struct dma_chan *chan;
+ rcu_read_lock();
+ list_for_each_entry_rcu(chan, &net_dma_client->channels, client_node)
+ dma_async_memcpy_issue_pending(chan);
+ rcu_read_unlock();
+ }
+#endif
local_irq_enable();
return;
total = 0;
for (dev = dev_base; dev; dev = dev->next) {
- if (!dev_in_nx_info(dev, current->nx_info))
+ if (vx_flags(VXF_HIDE_NETIF, 0) &&
+ !dev_in_nx_info(dev, current->nx_info))
continue;
for (i = 0; i < NPROTO; i++) {
if (gifconf_list[i]) {
{
struct nx_info *nxi = current->nx_info;
- if (!dev_in_nx_info(dev, nxi))
+ if (vx_flags(VXF_HIDE_NETIF, 0) && !dev_in_nx_info(dev, nxi))
return;
if (dev->get_stats) {
struct net_device_stats *stats = dev->get_stats(dev);
struct netif_rx_stats *s = v;
seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
- s->total, s->dropped, s->time_squeeze, s->throttled,
- s->fastroute_hit, s->fastroute_success, s->fastroute_defer,
- s->fastroute_deferred_out,
-#if 0
- s->fastroute_latency_reduction
-#else
- s->cpu_collision
-#endif
- );
+ s->total, s->dropped, s->time_squeeze, 0,
+ 0, 0, 0, 0, /* was fastroute */
+ s->cpu_collision );
return 0;
}
.release = seq_release,
};
-#ifdef WIRELESS_EXT
+#ifdef CONFIG_WIRELESS_EXT
extern int wireless_proc_init(void);
#else
#define wireless_proc_init() 0
* @dev: device
* @inc: modifier
*
- * Add or remove promsicuity from a device. While the count in the device
+ * Add or remove promiscuity from a device. While the count in the device
* remains above zero the interface remains promiscuous. Once it hits zero
* the device reverts back to normal filtering operation. A negative inc
* value is used to drop promiscuity on the device.
{
unsigned short old_flags = dev->flags;
- dev->flags |= IFF_PROMISC;
if ((dev->promiscuity += inc) == 0)
dev->flags &= ~IFF_PROMISC;
- if (dev->flags ^ old_flags) {
+ else
+ dev->flags |= IFF_PROMISC;
+ if (dev->flags != old_flags) {
dev_mc_upload(dev);
printk(KERN_INFO "device %s %s promiscuous mode\n",
dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
"left");
+ audit_log(current->audit_context, GFP_ATOMIC,
+ AUDIT_ANOM_PROMISCUOUS,
+ "dev=%s prom=%d old_prom=%d auid=%u",
+ dev->name, (dev->flags & IFF_PROMISC),
+ (old_flags & IFF_PROMISC),
+ audit_get_loginuid(current->audit_context));
}
}
flags = (dev->flags & ~(IFF_PROMISC |
IFF_ALLMULTI |
- IFF_RUNNING)) |
+ IFF_RUNNING |
+ IFF_LOWER_UP |
+ IFF_DORMANT)) |
(dev->gflags & (IFF_PROMISC |
IFF_ALLMULTI));
- if (netif_running(dev) && netif_carrier_ok(dev))
- flags |= IFF_RUNNING;
+ if (netif_running(dev)) {
+ if (netif_oper_up(dev))
+ flags |= IFF_RUNNING;
+ if (netif_carrier_ok(dev))
+ flags |= IFF_LOWER_UP;
+ if (netif_dormant(dev))
+ flags |= IFF_DORMANT;
+ }
return flags;
}
if (dev->flags & IFF_UP &&
((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
IFF_VOLATILE)))
- notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+ raw_notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGE, dev);
if ((flags ^ dev->gflags) & IFF_PROMISC) {
int inc = (flags & IFF_PROMISC) ? +1 : -1;
else
dev->mtu = new_mtu;
if (!err && dev->flags & IFF_UP)
- notifier_call_chain(&netdev_chain,
- NETDEV_CHANGEMTU, dev);
+ raw_notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGEMTU, dev);
return err;
}
+int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
+{
+ int err;
+
+ if (!dev->set_mac_address)
+ return -EOPNOTSUPP;
+ if (sa->sa_family != dev->type)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ err = dev->set_mac_address(dev, sa);
+ if (!err)
+ raw_notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGEADDR, dev);
+ return err;
+}
/*
* Perform the SIOCxIFxxx calls.
return dev_set_mtu(dev, ifr->ifr_mtu);
case SIOCGIFHWADDR:
- memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
- min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
+ if (!dev->addr_len)
+ memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data);
+ else
+ memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
+ min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
ifr->ifr_hwaddr.sa_family = dev->type;
return 0;
case SIOCSIFHWADDR:
- if (!dev->set_mac_address)
- return -EOPNOTSUPP;
- if (ifr->ifr_hwaddr.sa_family != dev->type)
- return -EINVAL;
- if (!netif_device_present(dev))
- return -ENODEV;
- err = dev->set_mac_address(dev, &ifr->ifr_hwaddr);
- if (!err)
- notifier_call_chain(&netdev_chain,
- NETDEV_CHANGEADDR, dev);
- return err;
+ return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
case SIOCSIFHWBROADCAST:
if (ifr->ifr_hwaddr.sa_family != dev->type)
return -EINVAL;
memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
- notifier_call_chain(&netdev_chain,
+ raw_notifier_call_chain(&netdev_chain,
NETDEV_CHANGEADDR, dev);
return 0;
*/
if (cmd == SIOCGIFCONF) {
- rtnl_shlock();
+ rtnl_lock();
ret = dev_ifconf((char __user *) arg);
- rtnl_shunlock();
+ rtnl_unlock();
return ret;
}
if (cmd == SIOCGIFNAME)
case SIOCBONDENSLAVE:
case SIOCBONDRELEASE:
case SIOCBONDSETHWADDR:
- case SIOCBONDSLAVEINFOQUERY:
- case SIOCBONDINFOQUERY:
case SIOCBONDCHANGEACTIVE:
case SIOCBRADDIF:
case SIOCBRDELIF:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ /* fall through */
+ case SIOCBONDSLAVEINFOQUERY:
+ case SIOCBONDINFOQUERY:
dev_load(ifr.ifr_name);
rtnl_lock();
ret = dev_ifsioc(&ifr, cmd);
ret = -EFAULT;
return ret;
}
-#ifdef WIRELESS_EXT
+#ifdef CONFIG_WIRELESS_EXT
/* Take care of Wireless Extensions */
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
/* If command is `set a parameter', or
* `get the encoding parameters', check if
* the user has the right to do it */
- if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE) {
+ if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE
+ || cmd == SIOCGIWENCODEEXT) {
if (!capable(CAP_NET_ADMIN))
return -EPERM;
}
/* Follow me in net/core/wireless.c */
ret = wireless_process_ioctl(&ifr, cmd);
rtnl_unlock();
- if (!ret && IW_IS_GET(cmd) &&
+ if (IW_IS_GET(cmd) &&
copy_to_user(arg, &ifr,
sizeof(struct ifreq)))
ret = -EFAULT;
return ret;
}
-#endif /* WIRELESS_EXT */
+#endif /* CONFIG_WIRELESS_EXT */
return -EINVAL;
}
}
* number. The caller must hold the rtnl semaphore or the
* dev_base_lock to be sure it remains unique.
*/
-int dev_new_index(void)
+static int dev_new_index(void)
{
static int ifindex;
for (;;) {
static int dev_boot_phase = 1;
/* Delayed registration/unregisteration */
-static spinlock_t net_todo_list_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(net_todo_list_lock);
static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list);
static inline void net_set_todo(struct net_device *dev)
* chain. 0 is returned on success. A negative errno code is returned
* on a failure to set up the device, or if the name is a duplicate.
*
- * Callers must hold the rtnl semaphore. See the comment at the
- * end of Space.c for details about the locking. You may want
+ * Callers must hold the rtnl semaphore. You may want
* register_netdev() instead of this.
*
* BUGS:
BUG_ON(dev_boot_phase);
ASSERT_RTNL();
+ might_sleep();
+
/* When net_device's are persistent, this will be fatal. */
BUG_ON(dev->reg_state != NETREG_UNINITIALIZED);
spin_lock_init(&dev->queue_lock);
- spin_lock_init(&dev->xmit_lock);
+ spin_lock_init(&dev->_xmit_lock);
dev->xmit_lock_owner = -1;
#ifdef CONFIG_NET_CLS_ACT
spin_lock_init(&dev->ingress_lock);
#endif
- ret = alloc_divert_blk(dev);
- if (ret)
- goto out;
-
dev->iflink = -1;
/* Init, if this function is available */
if (ret) {
if (ret > 0)
ret = -EIO;
- goto out_err;
+ goto out;
}
}
if (!dev_valid_name(dev->name)) {
ret = -EINVAL;
- goto out_err;
+ goto out;
}
dev->ifindex = dev_new_index();
= hlist_entry(p, struct net_device, name_hlist);
if (!strncmp(d->name, dev->name, IFNAMSIZ)) {
ret = -EEXIST;
- goto out_err;
+ goto out;
}
}
/* Fix illegal SG+CSUM combinations. */
if ((dev->features & NETIF_F_SG) &&
- !(dev->features & (NETIF_F_IP_CSUM |
- NETIF_F_NO_CSUM |
- NETIF_F_HW_CSUM))) {
- printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
+ !(dev->features & NETIF_F_ALL_CSUM)) {
+ printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no checksum feature.\n",
dev->name);
dev->features &= ~NETIF_F_SG;
}
+ /* TSO requires that SG is present as well. */
+ if ((dev->features & NETIF_F_TSO) &&
+ !(dev->features & NETIF_F_SG)) {
+ printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no SG feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_TSO;
+ }
+ if (dev->features & NETIF_F_UFO) {
+ if (!(dev->features & NETIF_F_HW_CSUM)) {
+ printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no "
+ "NETIF_F_HW_CSUM feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_UFO;
+ }
+ if (!(dev->features & NETIF_F_SG)) {
+ printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no "
+ "NETIF_F_SG feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_UFO;
+ }
+ }
+
/*
* nil rebuild_header routine,
* that should be never called and used as just bug trap.
if (!dev->rebuild_header)
dev->rebuild_header = default_rebuild_header;
+ ret = netdev_register_sysfs(dev);
+ if (ret)
+ goto out;
+ dev->reg_state = NETREG_REGISTERED;
+
/*
* Default initial state at registry is that the
* device is present.
hlist_add_head(&dev->name_hlist, head);
hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex));
dev_hold(dev);
- dev->reg_state = NETREG_REGISTERING;
write_unlock_bh(&dev_base_lock);
/* Notify protocols, that a new device appeared. */
- notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+ raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
- /* Finish registration after unlock */
- net_set_todo(dev);
ret = 0;
out:
return ret;
-out_err:
- free_divert_blk(dev);
- goto out;
}
+/**
+ * register_netdev - register a network device
+ * @dev: device to register
+ *
+ * Take a completed network device structure and add it to the kernel
+ * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
+ * chain. 0 is returned on success. A negative errno code is returned
+ * on a failure to set up the device, or if the name is a duplicate.
+ *
+ * This is a wrapper around register_netdev that takes the rtnl semaphore
+ * and expands the device name if you passed a format string to
+ * alloc_netdev.
+ */
+int register_netdev(struct net_device *dev)
+{
+ int err;
+
+ rtnl_lock();
+
+ /*
+ * If the name is a format string the caller wants us to do a
+ * name allocation.
+ */
+ if (strchr(dev->name, '%')) {
+ err = dev_alloc_name(dev, dev->name);
+ if (err < 0)
+ goto out;
+ }
+
+ err = register_netdevice(dev);
+out:
+ rtnl_unlock();
+ return err;
+}
+EXPORT_SYMBOL(register_netdev);
+
/*
* netdev_wait_allrefs - wait until all references are gone.
*
rebroadcast_time = warning_time = jiffies;
while (atomic_read(&dev->refcnt) != 0) {
if (time_after(jiffies, rebroadcast_time + 1 * HZ)) {
- rtnl_shlock();
+ rtnl_lock();
/* Rebroadcast unregister notification */
- notifier_call_chain(&netdev_chain,
+ raw_notifier_call_chain(&netdev_chain,
NETDEV_UNREGISTER, dev);
if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
linkwatch_run_queue();
}
- rtnl_shunlock();
+ __rtnl_unlock();
rebroadcast_time = jiffies;
}
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ / 4);
+ msleep(250);
if (time_after(jiffies, warning_time + 10 * HZ)) {
printk(KERN_EMERG "unregister_netdevice: "
*
* We are invoked by rtnl_unlock() after it drops the semaphore.
* This allows us to deal with problems:
- * 1) We can create/delete sysfs objects which invoke hotplug
+ * 1) We can delete sysfs objects which invoke hotplug
* without deadlocking with linkwatch via keventd.
* 2) Since we run with the RTNL semaphore not held, we can sleep
* safely in order to wait for the netdev refcnt to drop to zero.
*/
-static DECLARE_MUTEX(net_todo_run_mutex);
+static DEFINE_MUTEX(net_todo_run_mutex);
void netdev_run_todo(void)
{
- struct list_head list = LIST_HEAD_INIT(list);
- int err;
-
+ struct list_head list;
/* Need to guard against multiple cpu's getting out of order. */
- down(&net_todo_run_mutex);
+ mutex_lock(&net_todo_run_mutex);
/* Not safe to do outside the semaphore. We must not return
* until all unregister events invoked by the local processor
/* Snapshot list, allow later requests */
spin_lock(&net_todo_list_lock);
- list_splice_init(&net_todo_list, &list);
+ list_replace_init(&net_todo_list, &list);
spin_unlock(&net_todo_list_lock);
-
+
while (!list_empty(&list)) {
struct net_device *dev
= list_entry(list.next, struct net_device, todo_list);
list_del(&dev->todo_list);
- switch(dev->reg_state) {
- case NETREG_REGISTERING:
- err = netdev_register_sysfs(dev);
- if (err)
- printk(KERN_ERR "%s: failed sysfs registration (%d)\n",
- dev->name, err);
- dev->reg_state = NETREG_REGISTERED;
- break;
+ if (unlikely(dev->reg_state != NETREG_UNREGISTERING)) {
+ printk(KERN_ERR "network todo '%s' but state %d\n",
+ dev->name, dev->reg_state);
+ dump_stack();
+ continue;
+ }
- case NETREG_UNREGISTERING:
- netdev_unregister_sysfs(dev);
- dev->reg_state = NETREG_UNREGISTERED;
+ netdev_unregister_sysfs(dev);
+ dev->reg_state = NETREG_UNREGISTERED;
- netdev_wait_allrefs(dev);
+ netdev_wait_allrefs(dev);
- /* paranoia */
- BUG_ON(atomic_read(&dev->refcnt));
- BUG_TRAP(!dev->ip_ptr);
- BUG_TRAP(!dev->ip6_ptr);
- BUG_TRAP(!dev->dn_ptr);
+ /* paranoia */
+ BUG_ON(atomic_read(&dev->refcnt));
+ BUG_TRAP(!dev->ip_ptr);
+ BUG_TRAP(!dev->ip6_ptr);
+ BUG_TRAP(!dev->dn_ptr);
+ /* It must be the very last action,
+ * after this 'dev' may point to freed up memory.
+ */
+ if (dev->destructor)
+ dev->destructor(dev);
+ }
- /* It must be the very last action,
- * after this 'dev' may point to freed up memory.
- */
- if (dev->destructor)
- dev->destructor(dev);
- break;
+out:
+ mutex_unlock(&net_todo_run_mutex);
+}
- default:
- printk(KERN_ERR "network todo '%s' but state %d\n",
- dev->name, dev->reg_state);
- break;
- }
+/**
+ * alloc_netdev - allocate network device
+ * @sizeof_priv: size of private data to allocate space for
+ * @name: device name format string
+ * @setup: callback to initialize device
+ *
+ * Allocates a struct net_device with private data area for driver use
+ * and performs basic initialization.
+ */
+struct net_device *alloc_netdev(int sizeof_priv, const char *name,
+ void (*setup)(struct net_device *))
+{
+ void *p;
+ struct net_device *dev;
+ int alloc_size;
+
+ BUG_ON(strlen(name) >= sizeof(dev->name));
+
+ /* ensure 32-byte alignment of both the device and private area */
+ alloc_size = (sizeof(*dev) + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;
+ alloc_size += sizeof_priv + NETDEV_ALIGN_CONST;
+
+ p = kzalloc(alloc_size, GFP_KERNEL);
+ if (!p) {
+ printk(KERN_ERR "alloc_netdev: Unable to allocate device.\n");
+ return NULL;
}
-out:
- up(&net_todo_run_mutex);
+ dev = (struct net_device *)
+ (((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
+ dev->padded = (char *)dev - (char *)p;
+
+ if (sizeof_priv)
+ dev->priv = netdev_priv(dev);
+
+ setup(dev);
+ strcpy(dev->name, name);
+ return dev;
}
+EXPORT_SYMBOL(alloc_netdev);
/**
* free_netdev - free network device
void free_netdev(struct net_device *dev)
{
#ifdef CONFIG_SYSFS
- /* Compatiablity with error handling in drivers */
+ /* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) {
kfree((char *)dev - dev->padded);
return;
void synchronize_net(void)
{
might_sleep();
- synchronize_kernel();
+ synchronize_rcu();
}
/**
* from the kernel tables. On success 0 is returned, on a failure
* a negative errno code is returned.
*
- * Callers must hold the rtnl semaphore. See the comment at the
- * end of Space.c for details about the locking. You may want
+ * Callers must hold the rtnl semaphore. You may want
* unregister_netdev() instead of this.
*/
/* Notify protocols, that we are about to destroy
this device. They should clean all the things.
*/
- notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+ raw_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
/*
* Flush the multicast chain
/* Notifier chain MUST detach us from master device. */
BUG_TRAP(!dev->master);
- free_divert_blk(dev);
-
/* Finish processing unregister after unlock */
net_set_todo(dev);
return 0;
}
-#ifdef CONFIG_HOTPLUG_CPU
+/**
+ * unregister_netdev - remove device from the kernel
+ * @dev: device
+ *
+ * This function shuts down a device interface and removes it
+ * from the kernel tables. On success 0 is returned, on a failure
+ * a negative errno code is returned.
+ *
+ * This is just a wrapper for unregister_netdevice that takes
+ * the rtnl semaphore. In general you want to use this and not
+ * unregister_netdevice.
+ */
+void unregister_netdev(struct net_device *dev)
+{
+ rtnl_lock();
+ unregister_netdevice(dev);
+ rtnl_unlock();
+}
+
+EXPORT_SYMBOL(unregister_netdev);
+
static int dev_cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *ocpu)
return NOTIFY_OK;
}
-#endif /* CONFIG_HOTPLUG_CPU */
+#ifdef CONFIG_NET_DMA
+/**
+ * net_dma_rebalance -
+ * This is called when the number of channels allocated to the net_dma_client
+ * changes. The net_dma_client tries to have one DMA channel per CPU.
+ */
+static void net_dma_rebalance(void)
+{
+ unsigned int cpu, i, n;
+ struct dma_chan *chan;
+
+ if (net_dma_count == 0) {
+ for_each_online_cpu(cpu)
+ rcu_assign_pointer(per_cpu(softnet_data, cpu).net_dma, NULL);
+ return;
+ }
+
+ i = 0;
+ cpu = first_cpu(cpu_online_map);
+
+ rcu_read_lock();
+ list_for_each_entry(chan, &net_dma_client->channels, client_node) {
+ n = ((num_online_cpus() / net_dma_count)
+ + (i < (num_online_cpus() % net_dma_count) ? 1 : 0));
+
+ while(n) {
+ per_cpu(softnet_data, cpu).net_dma = chan;
+ cpu = next_cpu(cpu, cpu_online_map);
+ n--;
+ }
+ i++;
+ }
+ rcu_read_unlock();
+}
+
+/**
+ * netdev_dma_event - event callback for the net_dma_client
+ * @client: should always be net_dma_client
+ * @chan: DMA channel for the event
+ * @event: event type
+ */
+static void netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
+ enum dma_event event)
+{
+ spin_lock(&net_dma_event_lock);
+ switch (event) {
+ case DMA_RESOURCE_ADDED:
+ net_dma_count++;
+ net_dma_rebalance();
+ break;
+ case DMA_RESOURCE_REMOVED:
+ net_dma_count--;
+ net_dma_rebalance();
+ break;
+ default:
+ break;
+ }
+ spin_unlock(&net_dma_event_lock);
+}
+
+/**
+ * netdev_dma_regiser - register the networking subsystem as a DMA client
+ */
+static int __init netdev_dma_register(void)
+{
+ spin_lock_init(&net_dma_event_lock);
+ net_dma_client = dma_async_client_register(netdev_dma_event);
+ if (net_dma_client == NULL)
+ return -ENOMEM;
+
+ dma_async_client_chan_request(net_dma_client, num_online_cpus());
+ return 0;
+}
+
+#else
+static int __init netdev_dma_register(void) { return -ENODEV; }
+#endif /* CONFIG_NET_DMA */
/*
* Initialize the DEV module. At boot time this walks the device list and
* Initialise the packet receive queues.
*/
- for (i = 0; i < NR_CPUS; i++) {
+ for_each_possible_cpu(i) {
struct softnet_data *queue;
queue = &per_cpu(softnet_data, i);
skb_queue_head_init(&queue->input_pkt_queue);
- queue->throttle = 0;
- queue->cng_level = 0;
- queue->avg_blog = 10; /* arbitrary non-zero */
queue->completion_queue = NULL;
INIT_LIST_HEAD(&queue->poll_list);
set_bit(__LINK_STATE_START, &queue->backlog_dev.state);
atomic_set(&queue->backlog_dev.refcnt, 1);
}
-#ifdef OFFLINE_SAMPLE
- samp_timer.expires = jiffies + (10 * HZ);
- add_timer(&samp_timer);
-#endif
+ netdev_dma_register();
dev_boot_phase = 0;
subsys_initcall(net_dev_init);
-EXPORT_SYMBOL(__dev_get);
-EXPORT_SYMBOL(__dev_get_by_flags);
EXPORT_SYMBOL(__dev_get_by_index);
EXPORT_SYMBOL(__dev_get_by_name);
EXPORT_SYMBOL(__dev_remove_pack);
-EXPORT_SYMBOL(__skb_linearize);
-EXPORT_SYMBOL(call_netdevice_notifiers);
+EXPORT_SYMBOL(dev_valid_name);
EXPORT_SYMBOL(dev_add_pack);
EXPORT_SYMBOL(dev_alloc_name);
EXPORT_SYMBOL(dev_close);
EXPORT_SYMBOL(dev_get_by_flags);
EXPORT_SYMBOL(dev_get_by_index);
EXPORT_SYMBOL(dev_get_by_name);
-EXPORT_SYMBOL(dev_getbyhwaddr);
-EXPORT_SYMBOL(dev_ioctl);
-EXPORT_SYMBOL(dev_new_index);
EXPORT_SYMBOL(dev_open);
EXPORT_SYMBOL(dev_queue_xmit);
-EXPORT_SYMBOL(dev_queue_xmit_nit);
EXPORT_SYMBOL(dev_remove_pack);
EXPORT_SYMBOL(dev_set_allmulti);
EXPORT_SYMBOL(dev_set_promiscuity);
EXPORT_SYMBOL(dev_change_flags);
EXPORT_SYMBOL(dev_set_mtu);
+EXPORT_SYMBOL(dev_set_mac_address);
EXPORT_SYMBOL(free_netdev);
EXPORT_SYMBOL(netdev_boot_setup_check);
EXPORT_SYMBOL(netdev_set_master);
EXPORT_SYMBOL(synchronize_net);
EXPORT_SYMBOL(unregister_netdevice);
EXPORT_SYMBOL(unregister_netdevice_notifier);
+EXPORT_SYMBOL(net_enable_timestamp);
+EXPORT_SYMBOL(net_disable_timestamp);
+EXPORT_SYMBOL(dev_get_flags);
+EXPORT_SYMBOL(skb_checksum_setup);
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
EXPORT_SYMBOL(br_handle_frame_hook);
+EXPORT_SYMBOL(br_fdb_get_hook);
+EXPORT_SYMBOL(br_fdb_put_hook);
#endif
#ifdef CONFIG_KMOD
EXPORT_SYMBOL(dev_load);
#endif
-#ifdef CONFIG_NET_HW_FLOWCONTROL
-EXPORT_SYMBOL(netdev_dropping);
-EXPORT_SYMBOL(netdev_fc_xoff);
-EXPORT_SYMBOL(netdev_register_fc);
-EXPORT_SYMBOL(netdev_unregister_fc);
-#endif
-
-#ifdef CONFIG_NET_CLS_ACT
-EXPORT_SYMBOL(ing_filter);
-#endif
-
EXPORT_PER_CPU_SYMBOL(softnet_data);
git://git.onelab.eu / linux-2.6.git / blobdiff