mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 08:04:13 +08:00
net/core/skbuff.c: Use frag list abstraction interfaces.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
4cf704fbea
commit
fbb398a832
@ -210,7 +210,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
|
||||
shinfo->gso_type = 0;
|
||||
shinfo->ip6_frag_id = 0;
|
||||
shinfo->tx_flags.flags = 0;
|
||||
shinfo->frag_list = NULL;
|
||||
skb_frag_list_init(skb);
|
||||
memset(&shinfo->hwtstamps, 0, sizeof(shinfo->hwtstamps));
|
||||
|
||||
if (fclone) {
|
||||
@ -323,7 +323,7 @@ static void skb_clone_fraglist(struct sk_buff *skb)
|
||||
{
|
||||
struct sk_buff *list;
|
||||
|
||||
for (list = skb_shinfo(skb)->frag_list; list; list = list->next)
|
||||
skb_walk_frags(skb, list)
|
||||
skb_get(list);
|
||||
}
|
||||
|
||||
@ -338,7 +338,7 @@ static void skb_release_data(struct sk_buff *skb)
|
||||
put_page(skb_shinfo(skb)->frags[i].page);
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list)
|
||||
if (skb_has_frags(skb))
|
||||
skb_drop_fraglist(skb);
|
||||
|
||||
kfree(skb->head);
|
||||
@ -503,7 +503,7 @@ int skb_recycle_check(struct sk_buff *skb, int skb_size)
|
||||
shinfo->gso_type = 0;
|
||||
shinfo->ip6_frag_id = 0;
|
||||
shinfo->tx_flags.flags = 0;
|
||||
shinfo->frag_list = NULL;
|
||||
skb_frag_list_init(skb);
|
||||
memset(&shinfo->hwtstamps, 0, sizeof(shinfo->hwtstamps));
|
||||
|
||||
memset(skb, 0, offsetof(struct sk_buff, tail));
|
||||
@ -758,7 +758,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
|
||||
skb_shinfo(n)->nr_frags = i;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
if (skb_has_frags(skb)) {
|
||||
skb_shinfo(n)->frag_list = skb_shinfo(skb)->frag_list;
|
||||
skb_clone_fraglist(n);
|
||||
}
|
||||
@ -821,7 +821,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
|
||||
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
|
||||
get_page(skb_shinfo(skb)->frags[i].page);
|
||||
|
||||
if (skb_shinfo(skb)->frag_list)
|
||||
if (skb_has_frags(skb))
|
||||
skb_clone_fraglist(skb);
|
||||
|
||||
skb_release_data(skb);
|
||||
@ -1093,7 +1093,7 @@ drop_pages:
|
||||
for (; i < nfrags; i++)
|
||||
put_page(skb_shinfo(skb)->frags[i].page);
|
||||
|
||||
if (skb_shinfo(skb)->frag_list)
|
||||
if (skb_has_frags(skb))
|
||||
skb_drop_fraglist(skb);
|
||||
goto done;
|
||||
}
|
||||
@ -1188,7 +1188,7 @@ unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
|
||||
/* Optimization: no fragments, no reasons to preestimate
|
||||
* size of pulled pages. Superb.
|
||||
*/
|
||||
if (!skb_shinfo(skb)->frag_list)
|
||||
if (!skb_has_frags(skb))
|
||||
goto pull_pages;
|
||||
|
||||
/* Estimate size of pulled pages. */
|
||||
@ -1285,8 +1285,9 @@ EXPORT_SYMBOL(__pskb_pull_tail);
|
||||
|
||||
int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
|
||||
{
|
||||
int i, copy;
|
||||
int start = skb_headlen(skb);
|
||||
struct sk_buff *frag_iter;
|
||||
int i, copy;
|
||||
|
||||
if (offset > (int)skb->len - len)
|
||||
goto fault;
|
||||
@ -1328,28 +1329,23 @@ int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
|
||||
start = end;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
int end;
|
||||
|
||||
for (; list; list = list->next) {
|
||||
int end;
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
end = start + list->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
if (skb_copy_bits(list, offset - start,
|
||||
to, copy))
|
||||
goto fault;
|
||||
if ((len -= copy) == 0)
|
||||
return 0;
|
||||
offset += copy;
|
||||
to += copy;
|
||||
}
|
||||
start = end;
|
||||
end = start + frag_iter->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
if (skb_copy_bits(frag_iter, offset - start, to, copy))
|
||||
goto fault;
|
||||
if ((len -= copy) == 0)
|
||||
return 0;
|
||||
offset += copy;
|
||||
to += copy;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
if (!len)
|
||||
return 0;
|
||||
@ -1534,6 +1530,7 @@ int skb_splice_bits(struct sk_buff *skb, unsigned int offset,
|
||||
.ops = &sock_pipe_buf_ops,
|
||||
.spd_release = sock_spd_release,
|
||||
};
|
||||
struct sk_buff *frag_iter;
|
||||
struct sock *sk = skb->sk;
|
||||
|
||||
/*
|
||||
@ -1548,13 +1545,11 @@ int skb_splice_bits(struct sk_buff *skb, unsigned int offset,
|
||||
/*
|
||||
* now see if we have a frag_list to map
|
||||
*/
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
|
||||
for (; list && tlen; list = list->next) {
|
||||
if (__skb_splice_bits(list, &offset, &tlen, &spd, sk))
|
||||
break;
|
||||
}
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
if (!tlen)
|
||||
break;
|
||||
if (__skb_splice_bits(frag_iter, &offset, &tlen, &spd, sk))
|
||||
break;
|
||||
}
|
||||
|
||||
done:
|
||||
@ -1593,8 +1588,9 @@ done:
|
||||
|
||||
int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
|
||||
{
|
||||
int i, copy;
|
||||
int start = skb_headlen(skb);
|
||||
struct sk_buff *frag_iter;
|
||||
int i, copy;
|
||||
|
||||
if (offset > (int)skb->len - len)
|
||||
goto fault;
|
||||
@ -1635,28 +1631,24 @@ int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
|
||||
start = end;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
int end;
|
||||
|
||||
for (; list; list = list->next) {
|
||||
int end;
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
end = start + list->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
if (skb_store_bits(list, offset - start,
|
||||
from, copy))
|
||||
goto fault;
|
||||
if ((len -= copy) == 0)
|
||||
return 0;
|
||||
offset += copy;
|
||||
from += copy;
|
||||
}
|
||||
start = end;
|
||||
end = start + frag_iter->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
if (skb_store_bits(frag_iter, offset - start,
|
||||
from, copy))
|
||||
goto fault;
|
||||
if ((len -= copy) == 0)
|
||||
return 0;
|
||||
offset += copy;
|
||||
from += copy;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
if (!len)
|
||||
return 0;
|
||||
@ -1673,6 +1665,7 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
|
||||
{
|
||||
int start = skb_headlen(skb);
|
||||
int i, copy = start - offset;
|
||||
struct sk_buff *frag_iter;
|
||||
int pos = 0;
|
||||
|
||||
/* Checksum header. */
|
||||
@ -1712,29 +1705,25 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
|
||||
start = end;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
int end;
|
||||
|
||||
for (; list; list = list->next) {
|
||||
int end;
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
end = start + list->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
__wsum csum2;
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
csum2 = skb_checksum(list, offset - start,
|
||||
copy, 0);
|
||||
csum = csum_block_add(csum, csum2, pos);
|
||||
if ((len -= copy) == 0)
|
||||
return csum;
|
||||
offset += copy;
|
||||
pos += copy;
|
||||
}
|
||||
start = end;
|
||||
end = start + frag_iter->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
__wsum csum2;
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
csum2 = skb_checksum(frag_iter, offset - start,
|
||||
copy, 0);
|
||||
csum = csum_block_add(csum, csum2, pos);
|
||||
if ((len -= copy) == 0)
|
||||
return csum;
|
||||
offset += copy;
|
||||
pos += copy;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
BUG_ON(len);
|
||||
|
||||
@ -1749,6 +1738,7 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
|
||||
{
|
||||
int start = skb_headlen(skb);
|
||||
int i, copy = start - offset;
|
||||
struct sk_buff *frag_iter;
|
||||
int pos = 0;
|
||||
|
||||
/* Copy header. */
|
||||
@ -1793,31 +1783,27 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
|
||||
start = end;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
__wsum csum2;
|
||||
int end;
|
||||
|
||||
for (; list; list = list->next) {
|
||||
__wsum csum2;
|
||||
int end;
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
end = start + list->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
csum2 = skb_copy_and_csum_bits(list,
|
||||
offset - start,
|
||||
to, copy, 0);
|
||||
csum = csum_block_add(csum, csum2, pos);
|
||||
if ((len -= copy) == 0)
|
||||
return csum;
|
||||
offset += copy;
|
||||
to += copy;
|
||||
pos += copy;
|
||||
}
|
||||
start = end;
|
||||
end = start + frag_iter->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
csum2 = skb_copy_and_csum_bits(frag_iter,
|
||||
offset - start,
|
||||
to, copy, 0);
|
||||
csum = csum_block_add(csum, csum2, pos);
|
||||
if ((len -= copy) == 0)
|
||||
return csum;
|
||||
offset += copy;
|
||||
to += copy;
|
||||
pos += copy;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
BUG_ON(len);
|
||||
return csum;
|
||||
@ -2327,8 +2313,7 @@ next_skb:
|
||||
st->frag_data = NULL;
|
||||
}
|
||||
|
||||
if (st->root_skb == st->cur_skb &&
|
||||
skb_shinfo(st->root_skb)->frag_list) {
|
||||
if (st->root_skb == st->cur_skb && skb_has_frags(st->root_skb)) {
|
||||
st->cur_skb = skb_shinfo(st->root_skb)->frag_list;
|
||||
st->frag_idx = 0;
|
||||
goto next_skb;
|
||||
@ -2639,7 +2624,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
|
||||
} else
|
||||
skb_get(fskb2);
|
||||
|
||||
BUG_ON(skb_shinfo(nskb)->frag_list);
|
||||
SKB_FRAG_ASSERT(nskb);
|
||||
skb_shinfo(nskb)->frag_list = fskb2;
|
||||
}
|
||||
|
||||
@ -2796,6 +2781,7 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
|
||||
{
|
||||
int start = skb_headlen(skb);
|
||||
int i, copy = start - offset;
|
||||
struct sk_buff *frag_iter;
|
||||
int elt = 0;
|
||||
|
||||
if (copy > 0) {
|
||||
@ -2829,26 +2815,22 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
|
||||
start = end;
|
||||
}
|
||||
|
||||
if (skb_shinfo(skb)->frag_list) {
|
||||
struct sk_buff *list = skb_shinfo(skb)->frag_list;
|
||||
skb_walk_frags(skb, frag_iter) {
|
||||
int end;
|
||||
|
||||
for (; list; list = list->next) {
|
||||
int end;
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
WARN_ON(start > offset + len);
|
||||
|
||||
end = start + list->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
elt += __skb_to_sgvec(list, sg+elt, offset - start,
|
||||
copy);
|
||||
if ((len -= copy) == 0)
|
||||
return elt;
|
||||
offset += copy;
|
||||
}
|
||||
start = end;
|
||||
end = start + frag_iter->len;
|
||||
if ((copy = end - offset) > 0) {
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
elt += __skb_to_sgvec(frag_iter, sg+elt, offset - start,
|
||||
copy);
|
||||
if ((len -= copy) == 0)
|
||||
return elt;
|
||||
offset += copy;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
BUG_ON(len);
|
||||
return elt;
|
||||
@ -2896,7 +2878,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Easy case. Most of packets will go this way. */
|
||||
if (!skb_shinfo(skb)->frag_list) {
|
||||
if (!skb_has_frags(skb)) {
|
||||
/* A little of trouble, not enough of space for trailer.
|
||||
* This should not happen, when stack is tuned to generate
|
||||
* good frames. OK, on miss we reallocate and reserve even more
|
||||
@ -2931,7 +2913,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
|
||||
|
||||
if (skb1->next == NULL && tailbits) {
|
||||
if (skb_shinfo(skb1)->nr_frags ||
|
||||
skb_shinfo(skb1)->frag_list ||
|
||||
skb_has_frags(skb1) ||
|
||||
skb_tailroom(skb1) < tailbits)
|
||||
ntail = tailbits + 128;
|
||||
}
|
||||
@ -2940,7 +2922,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
|
||||
skb_cloned(skb1) ||
|
||||
ntail ||
|
||||
skb_shinfo(skb1)->nr_frags ||
|
||||
skb_shinfo(skb1)->frag_list) {
|
||||
skb_has_frags(skb1)) {
|
||||
struct sk_buff *skb2;
|
||||
|
||||
/* Fuck, we are miserable poor guys... */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user