#include <asm/system.h>
#include <linux/bitops.h>
#include <linux/capability.h>
-#include <linux/config.h>
#include <linux/cpu.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/audit.h>
#include <linux/dmaengine.h>
#include <linux/err.h>
+#include <linux/ctype.h>
/*
* The list of packet types we will receive (as opposed to discard)
* For efficiency
*/
-int netdev_nit;
+static int netdev_nit;
/*
* Add a protocol ID to the list. Now that the input handler is
* @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 (!strcmp(name, ".") || !strcmp(name, ".."))
+ return 0;
+
+ while (*name) {
+ if (*name == '/' || isspace(*name))
+ return 0;
+ name++;
+ }
+ return 1;
}
/**
unsigned int csum;
int ret = 0, offset = skb->h.raw - skb->data;
- if (inward) {
- skb->ip_summed = CHECKSUM_NONE;
- goto out;
+ if (inward)
+ goto out_set_summed;
+
+ if (unlikely(skb_shinfo(skb)->gso_size)) {
+ /* Let GSO fix up the checksum. */
+ goto out_set_summed;
}
if (skb_cloned(skb)) {
BUG_ON(skb->csum + 2 > offset);
*(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
+
+out_set_summed:
skb->ip_summed = CHECKSUM_NONE;
out:
return ret;
/**
* skb_gso_segment - Perform segmentation on skb.
* @skb: buffer to segment
- * @sg: whether scatter-gather is supported on the target.
+ * @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 sg)
+struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
{
struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT);
struct packet_type *ptype;
int type = skb->protocol;
+ int err;
BUG_ON(skb_shinfo(skb)->frag_list);
- BUG_ON(skb->ip_summed != CHECKSUM_HW);
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_HW)) {
+ 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) {
- segs = ptype->gso_segment(skb, sg);
+ if (unlikely(skb->ip_summed != CHECKSUM_HW)) {
+ 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(netdev_rx_csum_fault);
#endif
-#ifdef CONFIG_HIGHMEM
/* 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)
if (PageHighMem(skb_shinfo(skb)->frags[i].page))
return 1;
+#endif
return 0;
}
-#else
-#define illegal_highdma(dev, skb) (0)
-#endif
struct dev_gso_cb {
void (*destructor)(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;
- segs = skb_gso_segment(skb, dev->features & NETIF_F_SG &&
- !illegal_highdma(dev, skb));
if (unlikely(IS_ERR(segs)))
return PTR_ERR(segs);
if (netdev_nit)
dev_queue_xmit_nit(skb, dev);
- if (!netif_needs_gso(dev, skb))
- return dev->hard_start_xmit(skb, dev);
+ if (netif_needs_gso(dev, skb)) {
+ if (unlikely(dev_gso_segment(skb)))
+ goto out_kfree_skb;
+ if (skb->next)
+ goto gso;
+ }
- if (unlikely(dev_gso_segment(skb)))
- goto out_kfree_skb;
+ return dev->hard_start_xmit(skb, dev);
}
+gso:
do {
struct sk_buff *nskb = skb->next;
int rc;
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;
struct net_device *dev = skb->dev;
if (dev->master) {
- /*
- * On bonding slaves other than the currently active
- * slave, suppress duplicates except for 802.3ad
- * ETH_P_SLOW and alb non-mcast/bcast.
- */
- if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
- if (dev->master->priv_flags & IFF_MASTER_ALB) {
- if (skb->pkt_type != PACKET_BROADCAST &&
- skb->pkt_type != PACKET_MULTICAST)
- goto keep;
- }
-
- if (dev->master->priv_flags & IFF_MASTER_8023AD &&
- skb->protocol == __constant_htons(ETH_P_SLOW))
- goto keep;
-
+ if (skb_bond_should_drop(skb)) {
kfree_skb(skb);
return NULL;
}
-keep:
skb->dev = dev->master;
}
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",
+ printk(KERN_WARNING "Redir loop detected Dropping packet (%s->%s)\n",
skb->input_dev->name, skb->dev->name);
return TC_ACT_SHOT;
}
/* Fix illegal SG+CSUM combinations. */
if ((dev->features & NETIF_F_SG) &&
!(dev->features & NETIF_F_ALL_CSUM)) {
- printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
+ 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("%s: Dropping NETIF_F_TSO since no SG feature.\n",
+ printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no SG feature.\n",
dev->name);
dev->features &= ~NETIF_F_TSO;
}
static DEFINE_MUTEX(net_todo_run_mutex);
void netdev_run_todo(void)
{
- struct list_head list = LIST_HEAD_INIT(list);
+ struct list_head list;
/* Need to guard against multiple cpu's getting out of order. */
mutex_lock(&net_todo_run_mutex);
/* 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);
unsigned int cpu, i, n;
struct dma_chan *chan;
- lock_cpu_hotplug();
-
if (net_dma_count == 0) {
for_each_online_cpu(cpu)
- rcu_assign_pointer(per_cpu(softnet_data.net_dma, cpu), NULL);
- unlock_cpu_hotplug();
+ rcu_assign_pointer(per_cpu(softnet_data, cpu).net_dma, NULL);
return;
}
+ (i < (num_online_cpus() % net_dma_count) ? 1 : 0));
while(n) {
- per_cpu(softnet_data.net_dma, cpu) = chan;
+ per_cpu(softnet_data, cpu).net_dma = chan;
cpu = next_cpu(cpu, cpu_online_map);
n--;
}
i++;
}
rcu_read_unlock();
-
- unlock_cpu_hotplug();
}
/**
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff