#include <linux/inet.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
-#ifdef CONFIG_NET_CLS_ACT
-#include <net/pkt_sched.h>
-#endif
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/cache.h>
nf_bridge_put(skb->nf_bridge);
#endif
#endif
-/* XXX: IS this still necessary? - JHS */
-#ifdef CONFIG_NET_SCHED
- skb->tc_index = 0;
-#ifdef CONFIG_NET_CLS_ACT
- skb->tc_verd = 0;
- skb->tc_classid = 0;
-#endif
-#endif
-
kfree_skbmem(skb);
}
#endif
#ifdef CONFIG_NET_SCHED
C(tc_index);
-#ifdef CONFIG_NET_CLS_ACT
- n->tc_verd = SET_TC_VERD(skb->tc_verd,0);
- n->tc_verd = CLR_TC_OK2MUNGE(skb->tc_verd);
- n->tc_verd = CLR_TC_MUNGED(skb->tc_verd);
- C(input_dev);
- C(tc_classid);
-#endif
-
#endif
- C(xid);
C(truesize);
atomic_set(&n->users, 1);
C(head);
#endif
#endif
#ifdef CONFIG_NET_SCHED
-#ifdef CONFIG_NET_CLS_ACT
- new->tc_verd = old->tc_verd;
-#endif
new->tc_index = old->tc_index;
#endif
- new->xid = old->xid;
atomic_set(&new->users, 1);
}
return -EFAULT;
}
-/* Keep iterating until skb_iter_next returns false. */
-void skb_iter_first(const struct sk_buff *skb, struct skb_iter *i)
-{
- i->len = skb_headlen(skb);
- i->data = (unsigned char *)skb->data;
- i->nextfrag = 0;
- i->fraglist = NULL;
-}
-
-int skb_iter_next(const struct sk_buff *skb, struct skb_iter *i)
-{
- /* Unmap previous, if not head fragment. */
- if (i->nextfrag)
- kunmap_skb_frag(i->data);
-
- if (i->fraglist) {
- fraglist:
- /* We're iterating through fraglist. */
- if (i->nextfrag < skb_shinfo(i->fraglist)->nr_frags) {
- i->data = kmap_skb_frag(&skb_shinfo(i->fraglist)
- ->frags[i->nextfrag]);
- i->len = skb_shinfo(i->fraglist)->frags[i->nextfrag]
- .size;
- i->nextfrag++;
- return 1;
- }
- /* Fragments with fragments? Too hard! */
- BUG_ON(skb_shinfo(i->fraglist)->frag_list);
- i->fraglist = i->fraglist->next;
- if (!i->fraglist)
- goto end;
-
- i->len = skb_headlen(i->fraglist);
- i->data = i->fraglist->data;
- i->nextfrag = 0;
- return 1;
- }
-
- if (i->nextfrag < skb_shinfo(skb)->nr_frags) {
- i->data = kmap_skb_frag(&skb_shinfo(skb)->frags[i->nextfrag]);
- i->len = skb_shinfo(skb)->frags[i->nextfrag].size;
- i->nextfrag++;
- return 1;
- }
-
- i->fraglist = skb_shinfo(skb)->frag_list;
- if (i->fraglist)
- goto fraglist;
-
-end:
- /* Bug trap for callers */
- i->data = NULL;
- return 0;
-}
-
-void skb_iter_abort(const struct sk_buff *skb, struct skb_iter *i)
-{
- /* Unmap previous, if not head fragment. */
- if (i->data && i->nextfrag)
- kunmap_skb_frag(i->data);
- /* Bug trap for callers */
- i->data = NULL;
-}
-
/* Checksum skb data. */
unsigned int skb_checksum(const struct sk_buff *skb, int offset,
}
#endif
-static void inline skb_split_inside_header(struct sk_buff *skb,
- struct sk_buff* skb1,
- const u32 len, const int pos)
-{
- int i;
-
- memcpy(skb_put(skb1, pos - len), skb->data + len, pos - len);
-
- /* And move data appendix as is. */
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- skb_shinfo(skb1)->frags[i] = skb_shinfo(skb)->frags[i];
-
- skb_shinfo(skb1)->nr_frags = skb_shinfo(skb)->nr_frags;
- skb_shinfo(skb)->nr_frags = 0;
- skb1->data_len = skb->data_len;
- skb1->len += skb1->data_len;
- skb->data_len = 0;
- skb->len = len;
- skb->tail = skb->data + len;
-}
-
-static void inline skb_split_no_header(struct sk_buff *skb,
- struct sk_buff* skb1,
- const u32 len, int pos)
-{
- int i, k = 0;
- const int nfrags = skb_shinfo(skb)->nr_frags;
-
- skb_shinfo(skb)->nr_frags = 0;
- skb1->len = skb1->data_len = skb->len - len;
- skb->len = len;
- skb->data_len = len - pos;
-
- for (i = 0; i < nfrags; i++) {
- int size = skb_shinfo(skb)->frags[i].size;
-
- if (pos + size > len) {
- skb_shinfo(skb1)->frags[k] = skb_shinfo(skb)->frags[i];
-
- if (pos < len) {
- /* Split frag.
- * We have to variants in this case:
- * 1. Move all the frag to the second
- * part, if it is possible. F.e.
- * this approach is mandatory for TUX,
- * where splitting is expensive.
- * 2. Split is accurately. We make this.
- */
- get_page(skb_shinfo(skb)->frags[i].page);
- skb_shinfo(skb1)->frags[0].page_offset += len - pos;
- skb_shinfo(skb1)->frags[0].size -= len - pos;
- skb_shinfo(skb)->frags[i].size = len - pos;
- skb_shinfo(skb)->nr_frags++;
- }
- k++;
- } else
- skb_shinfo(skb)->nr_frags++;
- pos += size;
- }
- skb_shinfo(skb1)->nr_frags = k;
-}
-
-/**
- * skb_split - Split fragmented skb to two parts at length len.
- */
-void skb_split(struct sk_buff *skb, struct sk_buff *skb1, const u32 len)
-{
- int pos = skb_headlen(skb);
-
- if (len < pos) /* Split line is inside header. */
- skb_split_inside_header(skb, skb1, len, pos);
- else /* Second chunk has no header, nothing to copy. */
- skb_split_no_header(skb, skb1, len, pos);
-}
-
void __init skb_init(void)
{
skbuff_head_cache = kmem_cache_create("skbuff_head_cache",
EXPORT_SYMBOL(skb_queue_tail);
EXPORT_SYMBOL(skb_unlink);
EXPORT_SYMBOL(skb_append);
-EXPORT_SYMBOL(skb_split);
-EXPORT_SYMBOL(skb_iter_first);
-EXPORT_SYMBOL(skb_iter_next);
-EXPORT_SYMBOL(skb_iter_abort);
git://git.onelab.eu / linux-2.6.git / blobdiff