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6lowpan: store fragment tag values per device instead of net stack wide

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Signed-off-by: Tony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Cheneau 2013-03-25 17:59:28 +00:00 committed by David S. Miller
parent 9da2924c4b
commit d4ac32365d
1 changed files with 5 additions and 4 deletions
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9
net/ieee802154/6lowpan.c
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@ -104,6 +104,7 @@ static const u8 lowpan_llprefix[] = {0xfe, 0x80};
struct lowpan_dev_info {
struct net_device *real_dev; /* real WPAN device ptr */
struct mutex dev_list_mtx; /* mutex for list ops */
unsigned short fragment_tag;
};
struct lowpan_dev_record {
@ -120,7 +121,6 @@ struct lowpan_fragment {
struct list_head list; /* fragments list */
};
static unsigned short fragment_tag;
static LIST_HEAD(lowpan_fragments);
static DEFINE_SPINLOCK(flist_lock);
@ -1027,14 +1027,14 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
}
static int
lowpan_skb_fragmentation(struct sk_buff *skb)
lowpan_skb_fragmentation(struct sk_buff *skb, struct net_device *dev)
{
int err, header_length, payload_length, tag, offset = 0;
u8 head[5];
header_length = lowpan_get_mac_header_length(skb);
payload_length = skb->len - header_length;
tag = fragment_tag++;
tag = lowpan_dev_info(dev)->fragment_tag++;
/* first fragment header */
head[0] = LOWPAN_DISPATCH_FRAG1 | ((payload_length >> 8) & 0x7);
@ -1099,7 +1099,7 @@ static netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
}
pr_debug("frame is too big, fragmentation is needed\n");
err = lowpan_skb_fragmentation(skb);
err = lowpan_skb_fragmentation(skb, dev);
error:
dev_kfree_skb(skb);
out:
@ -1243,6 +1243,7 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
return -ENODEV;
lowpan_dev_info(dev)->real_dev = real_dev;
lowpan_dev_info(dev)->fragment_tag = 0;
mutex_init(&lowpan_dev_info(dev)->dev_list_mtx);
entry = kzalloc(sizeof(struct lowpan_dev_record), GFP_KERNEL);