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Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c102
1 files changed, 61 insertions, 41 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 1e169a541ce..38b03da5c1c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -557,6 +557,7 @@ __setup("netdev=", netdev_boot_setup);
/**
* __dev_get_by_name - find a device by its name
+ * @net: the applicable net namespace
* @name: name to find
*
* Find an interface by name. Must be called under RTNL semaphore
@@ -581,6 +582,7 @@ struct net_device *__dev_get_by_name(struct net *net, const char *name)
/**
* dev_get_by_name - find a device by its name
+ * @net: the applicable net namespace
* @name: name to find
*
* Find an interface by name. This can be called from any
@@ -604,6 +606,7 @@ struct net_device *dev_get_by_name(struct net *net, const char *name)
/**
* __dev_get_by_index - find a device by its ifindex
+ * @net: the applicable net namespace
* @ifindex: index of device
*
* Search for an interface by index. Returns %NULL if the device
@@ -629,6 +632,7 @@ struct net_device *__dev_get_by_index(struct net *net, int ifindex)
/**
* dev_get_by_index - find a device by its ifindex
+ * @net: the applicable net namespace
* @ifindex: index of device
*
* Search for an interface by index. Returns NULL if the device
@@ -651,6 +655,7 @@ struct net_device *dev_get_by_index(struct net *net, int ifindex)
/**
* dev_getbyhwaddr - find a device by its hardware address
+ * @net: the applicable net namespace
* @type: media type of device
* @ha: hardware address
*
@@ -709,6 +714,7 @@ EXPORT_SYMBOL(dev_getfirstbyhwtype);
/**
* dev_get_by_flags - find any device with given flags
+ * @net: the applicable net namespace
* @if_flags: IFF_* values
* @mask: bitmask of bits in if_flags to check
*
@@ -948,6 +954,7 @@ void netdev_state_change(struct net_device *dev)
/**
* dev_load - load a network module
+ * @net: the applicable net namespace
* @name: name of interface
*
* If a network interface is not present and the process has suitable
@@ -1185,7 +1192,7 @@ int unregister_netdevice_notifier(struct notifier_block *nb)
/**
* call_netdevice_notifiers - call all network notifier blocks
* @val: value passed unmodified to notifier function
- * @v: pointer passed unmodified to notifier function
+ * @dev: net_device pointer passed unmodified to notifier function
*
* Call all network notifier blocks. Parameters and return value
* are as for raw_notifier_call_chain().
@@ -1355,22 +1362,21 @@ int skb_checksum_help(struct sk_buff *skb)
goto out_set_summed;
}
- if (skb_cloned(skb)) {
+ offset = skb->csum_start - skb_headroom(skb);
+ BUG_ON(offset >= skb_headlen(skb));
+ csum = skb_checksum(skb, offset, skb->len - offset, 0);
+
+ offset += skb->csum_offset;
+ BUG_ON(offset + sizeof(__sum16) > skb_headlen(skb));
+
+ if (skb_cloned(skb) &&
+ !skb_clone_writable(skb, offset + sizeof(__sum16))) {
ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (ret)
goto out;
}
- offset = skb->csum_start - skb_headroom(skb);
- BUG_ON(offset > (int)skb->len);
- csum = skb_checksum(skb, offset, skb->len-offset, 0);
-
- offset = skb_headlen(skb) - offset;
- BUG_ON(offset <= 0);
- BUG_ON(skb->csum_offset + 2 > offset);
-
- *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) =
- csum_fold(csum);
+ *(__sum16 *)(skb->data + offset) = csum_fold(csum);
out_set_summed:
skb->ip_summed = CHECKSUM_NONE;
out:
@@ -1942,27 +1948,51 @@ static int ing_filter(struct sk_buff *skb)
struct Qdisc *q;
struct net_device *dev = skb->dev;
int result = TC_ACT_OK;
+ u32 ttl = G_TC_RTTL(skb->tc_verd);
- if (dev->qdisc_ingress) {
- __u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd);
- if (MAX_RED_LOOP < ttl++) {
- printk(KERN_WARNING "Redir loop detected Dropping packet (%d->%d)\n",
- skb->iif, skb->dev->ifindex);
- return TC_ACT_SHOT;
- }
+ if (MAX_RED_LOOP < ttl++) {
+ printk(KERN_WARNING
+ "Redir loop detected Dropping packet (%d->%d)\n",
+ skb->iif, 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);
- skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl);
+ spin_lock(&dev->ingress_lock);
+ if ((q = dev->qdisc_ingress) != NULL)
+ result = q->enqueue(skb, q);
+ spin_unlock(&dev->ingress_lock);
- skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS);
+ return result;
+}
+
+static inline struct sk_buff *handle_ing(struct sk_buff *skb,
+ struct packet_type **pt_prev,
+ int *ret, struct net_device *orig_dev)
+{
+ if (!skb->dev->qdisc_ingress)
+ goto out;
- spin_lock(&dev->ingress_lock);
- if ((q = dev->qdisc_ingress) != NULL)
- result = q->enqueue(skb, q);
- spin_unlock(&dev->ingress_lock);
+ if (*pt_prev) {
+ *ret = deliver_skb(skb, *pt_prev, orig_dev);
+ *pt_prev = NULL;
+ } else {
+ /* Huh? Why does turning on AF_PACKET affect this? */
+ skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
+ }
+ switch (ing_filter(skb)) {
+ case TC_ACT_SHOT:
+ case TC_ACT_STOLEN:
+ kfree_skb(skb);
+ return NULL;
}
- return result;
+out:
+ skb->tc_verd = 0;
+ return skb;
}
#endif
@@ -2014,21 +2044,9 @@ int netif_receive_skb(struct sk_buff *skb)
}
#ifdef CONFIG_NET_CLS_ACT
- if (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);
- }
-
- ret = ing_filter(skb);
-
- if (ret == TC_ACT_SHOT || (ret == TC_ACT_STOLEN)) {
- kfree_skb(skb);
+ skb = handle_ing(skb, &pt_prev, &ret, orig_dev);
+ if (!skb)
goto out;
- }
-
- skb->tc_verd = 0;
ncls:
#endif
@@ -2097,7 +2115,7 @@ static int process_backlog(struct napi_struct *napi, int quota)
/**
* __napi_schedule - schedule for receive
- * @napi: entry to schedule
+ * @n: entry to schedule
*
* The entry's receive function will be scheduled to run
*/
@@ -3259,6 +3277,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
/**
* dev_ioctl - network device ioctl
+ * @net: the applicable net namespace
* @cmd: command to issue
* @arg: pointer to a struct ifreq in user space
*
@@ -3436,6 +3455,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
/**
* dev_new_index - allocate an ifindex
+ * @net: the applicable net namespace
*
* Returns a suitable unique value for a new device interface
* number. The caller must hold the rtnl semaphore or the
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-11 15:00:39 +0000