* The functions in this file will not compile correctly with gcc 2.4.x
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/cache.h>
#include <linux/rtnetlink.h>
#include <linux/init.h>
-#include <linux/highmem.h>
#include <net/protocol.h>
#include <net/dst.h>
#include <asm/uaccess.h>
#include <asm/system.h>
-static kmem_cache_t *skbuff_head_cache __read_mostly;
-static kmem_cache_t *skbuff_fclone_cache __read_mostly;
+#include "kmap_skb.h"
+
+static struct kmem_cache *skbuff_head_cache __read_mostly;
+static struct kmem_cache *skbuff_fclone_cache __read_mostly;
/*
* Keep out-of-line to prevent kernel bloat.
* @gfp_mask: allocation mask
* @fclone: allocate from fclone cache instead of head cache
* and allocate a cloned (child) skb
+ * @node: numa node to allocate memory on
*
* Allocate a new &sk_buff. The returned buffer has no headroom and a
* tail room of size bytes. The object has a reference count of one.
*/
#ifndef CONFIG_HAVE_ARCH_ALLOC_SKB
struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
- int fclone)
+ int fclone, int node)
{
- kmem_cache_t *cache;
+ struct kmem_cache *cache;
struct skb_shared_info *shinfo;
struct sk_buff *skb;
u8 *data;
cache = fclone ? skbuff_fclone_cache : skbuff_head_cache;
/* Get the HEAD */
- skb = kmem_cache_alloc(cache, gfp_mask & ~__GFP_DMA);
+ skb = kmem_cache_alloc_node(cache, gfp_mask & ~__GFP_DMA, node);
if (!skb)
goto out;
/* Get the DATA. Size must match skb_add_mtu(). */
size = SKB_DATA_ALIGN(size);
- data = ____kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
+ data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info),
+ gfp_mask, node);
if (!data)
goto nodata;
* Buffers may only be allocated from interrupts using a @gfp_mask of
* %GFP_ATOMIC.
*/
-struct sk_buff *alloc_skb_from_cache(kmem_cache_t *cp,
+struct sk_buff *alloc_skb_from_cache(struct kmem_cache *cp,
unsigned int size,
gfp_t gfp_mask,
int fclone)
{
- kmem_cache_t *cache;
- struct skb_shared_info *shinfo;
+ struct kmem_cache *cache;
struct sk_buff *skb;
u8 *data;
skb->data = data;
skb->tail = data;
skb->end = data + size;
- /* make sure we initialize shinfo sequentially */
- shinfo = skb_shinfo(skb);
- atomic_set(&shinfo->dataref, 1);
- shinfo->nr_frags = 0;
- shinfo->gso_size = 0;
- shinfo->gso_segs = 0;
- shinfo->gso_type = 0;
- shinfo->ip6_frag_id = 0;
- shinfo->frag_list = NULL;
+
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->gso_size = 0;
+ skb_shinfo(skb)->gso_segs = 0;
+ skb_shinfo(skb)->gso_type = 0;
+ skb_shinfo(skb)->frag_list = NULL;
if (fclone) {
struct sk_buff *child = skb + 1;
goto out;
}
+/**
+ * __netdev_alloc_skb - allocate an skbuff for rx on a specific device
+ * @dev: network device to receive on
+ * @length: length to allocate
+ * @gfp_mask: get_free_pages mask, passed to alloc_skb
+ *
+ * Allocate a new &sk_buff and assign it a usage count of one. The
+ * buffer has unspecified headroom built in. Users should allocate
+ * the headroom they think they need without accounting for the
+ * built in space. The built in space is used for optimisations.
+ *
+ * %NULL is returned if there is no free memory.
+ */
+struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
+ unsigned int length, gfp_t gfp_mask)
+{
+ int node = dev->class_dev.dev ? dev_to_node(dev->class_dev.dev) : -1;
+ struct sk_buff *skb;
+
+ skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, 0, node);
+ if (likely(skb)) {
+ skb_reserve(skb, NET_SKB_PAD);
+ skb->dev = dev;
+ }
+ return skb;
+}
static void skb_drop_list(struct sk_buff **listp)
{
skb_get(list);
}
-void skb_release_data(struct sk_buff *skb)
+static void skb_release_data(struct sk_buff *skb)
{
if (!skb->cloned ||
!atomic_sub_return(skb->nohdr ? (1 << SKB_DATAREF_SHIFT) + 1 : 1,
memcpy(n->cb, skb->cb, sizeof(skb->cb));
C(len);
C(data_len);
+ C(mac_len);
C(csum);
C(local_df);
n->cloned = 1;
#endif
C(protocol);
n->destructor = NULL;
+ C(mark);
#ifdef CONFIG_NETFILTER
- C(nfmark);
C(nfct);
nf_conntrack_get(skb->nfct);
C(nfctinfo);
n->tc_verd = SET_TC_VERD(skb->tc_verd,0);
n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
- C(input_dev);
+ C(iif);
#endif
-
+ skb_copy_secmark(n, skb);
#endif
C(truesize);
atomic_set(&n->users, 1);
new->pkt_type = old->pkt_type;
new->tstamp = old->tstamp;
new->destructor = NULL;
+ new->mark = old->mark;
#ifdef CONFIG_NETFILTER
- new->nfmark = old->nfmark;
new->nfct = old->nfct;
nf_conntrack_get(old->nfct);
new->nfctinfo = old->nfctinfo;
#endif
new->tc_index = old->tc_index;
#endif
+ skb_copy_secmark(new, old);
atomic_set(&new->users, 1);
skb_shinfo(new)->gso_size = skb_shinfo(old)->gso_size;
skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs;
n->csum = skb->csum;
n->ip_summed = skb->ip_summed;
+ n->truesize += skb->data_len;
n->data_len = skb->data_len;
n->len = skb->len;
* filled. Used by network drivers which may DMA or transfer data
* beyond the buffer end onto the wire.
*
- * May return NULL in out of memory cases.
+ * May return error in out of memory cases. The skb is freed on error.
*/
-struct sk_buff *skb_pad(struct sk_buff *skb, int pad)
+int skb_pad(struct sk_buff *skb, int pad)
{
- struct sk_buff *nskb;
+ int err;
+ int ntail;
/* If the skbuff is non linear tailroom is always zero.. */
- if (skb_tailroom(skb) >= pad) {
+ if (!skb_cloned(skb) && skb_tailroom(skb) >= pad) {
memset(skb->data+skb->len, 0, pad);
- return skb;
+ return 0;
}
-
- nskb = skb_copy_expand(skb, skb_headroom(skb), skb_tailroom(skb) + pad, GFP_ATOMIC);
+
+ ntail = skb->data_len + pad - (skb->end - skb->tail);
+ if (likely(skb_cloned(skb) || ntail > 0)) {
+ err = pskb_expand_head(skb, 0, ntail, GFP_ATOMIC);
+ if (unlikely(err))
+ goto free_skb;
+ }
+
+ /* FIXME: The use of this function with non-linear skb's really needs
+ * to be audited.
+ */
+ err = skb_linearize(skb);
+ if (unlikely(err))
+ goto free_skb;
+
+ memset(skb->data + skb->len, 0, pad);
+ return 0;
+
+free_skb:
kfree_skb(skb);
- if (nskb)
- memset(nskb->data+nskb->len, 0, pad);
- return nskb;
+ return err;
}
/* Trims skb to length len. It can change skb pointers.
/* Checksum skb data. */
-unsigned int skb_checksum(const struct sk_buff *skb, int offset,
- int len, unsigned int csum)
+__wsum skb_checksum(const struct sk_buff *skb, int offset,
+ int len, __wsum csum)
{
int start = skb_headlen(skb);
int i, copy = start - offset;
end = start + skb_shinfo(skb)->frags[i].size;
if ((copy = end - offset) > 0) {
- unsigned int csum2;
+ __wsum csum2;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
end = start + list->len;
if ((copy = end - offset) > 0) {
- unsigned int csum2;
+ __wsum csum2;
if (copy > len)
copy = len;
csum2 = skb_checksum(list, offset - start,
/* Both of above in one bottle. */
-unsigned int skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
- u8 *to, int len, unsigned int csum)
+__wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
+ u8 *to, int len, __wsum csum)
{
int start = skb_headlen(skb);
int i, copy = start - offset;
end = start + skb_shinfo(skb)->frags[i].size;
if ((copy = end - offset) > 0) {
- unsigned int csum2;
+ __wsum csum2;
u8 *vaddr;
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
struct sk_buff *list = skb_shinfo(skb)->frag_list;
for (; list; list = list->next) {
- unsigned int csum2;
+ __wsum csum2;
int end;
BUG_TRAP(start <= offset + len);
void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
{
- unsigned int csum;
+ __wsum csum;
long csstart;
- if (skb->ip_summed == CHECKSUM_HW)
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
csstart = skb->h.raw - skb->data;
else
csstart = skb_headlen(skb);
csum = skb_copy_and_csum_bits(skb, csstart, to + csstart,
skb->len - csstart, 0);
- if (skb->ip_summed == CHECKSUM_HW) {
- long csstuff = csstart + skb->csum;
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ long csstuff = csstart + skb->csum_offset;
- *((unsigned short *)(to + csstuff)) = csum_fold(csum);
+ *((__sum16 *)(to + csstuff)) = csum_fold(csum);
}
}
unsigned int to, struct ts_config *config,
struct ts_state *state)
{
+ unsigned int ret;
+
config->get_next_block = skb_ts_get_next_block;
config->finish = skb_ts_finish;
skb_prepare_seq_read(skb, from, to, TS_SKB_CB(state));
- return textsearch_find(config, state);
+ ret = textsearch_find(config, state);
+ return (ret <= to - from ? ret : UINT_MAX);
}
/**
* @len: length of data pulled
*
* This function performs an skb_pull on the packet and updates
- * update the CHECKSUM_HW checksum. It should be used on receive
- * path processing instead of skb_pull unless you know that the
- * checksum difference is zero (e.g., a valid IP header) or you
- * are setting ip_summed to CHECKSUM_NONE.
+ * update the CHECKSUM_COMPLETE checksum. It should be used on
+ * receive path processing instead of skb_pull unless you know
+ * that the checksum difference is zero (e.g., a valid IP header)
+ * or you are setting ip_summed to CHECKSUM_NONE.
*/
unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
{
do {
struct sk_buff *nskb;
skb_frag_t *frag;
- int hsize, nsize;
+ int hsize;
int k;
int size;
hsize = skb_headlen(skb) - offset;
if (hsize < 0)
hsize = 0;
- nsize = hsize + doffset;
- if (nsize > len + doffset || !sg)
- nsize = len + doffset;
+ if (hsize > len || !sg)
+ hsize = len;
- nskb = alloc_skb(nsize + headroom, GFP_ATOMIC);
+ nskb = alloc_skb(hsize + doffset + headroom, GFP_ATOMIC);
if (unlikely(!nskb))
goto err;
frag = skb_shinfo(nskb)->frags;
k = 0;
- nskb->ip_summed = CHECKSUM_HW;
+ nskb->ip_summed = CHECKSUM_PARTIAL;
nskb->csum = skb->csum;
memcpy(skb_put(nskb, hsize), skb->data + offset, hsize);
skbuff_head_cache = kmem_cache_create("skbuff_head_cache",
sizeof(struct sk_buff),
0,
- SLAB_HWCACHE_ALIGN,
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC,
NULL, NULL);
- if (!skbuff_head_cache)
- panic("cannot create skbuff cache");
-
skbuff_fclone_cache = kmem_cache_create("skbuff_fclone_cache",
(2*sizeof(struct sk_buff)) +
sizeof(atomic_t),
0,
- SLAB_HWCACHE_ALIGN,
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC,
NULL, NULL);
- if (!skbuff_fclone_cache)
- panic("cannot create skbuff cache");
}
EXPORT_SYMBOL(___pskb_trim);
EXPORT_SYMBOL(kfree_skb);
EXPORT_SYMBOL(__pskb_pull_tail);
EXPORT_SYMBOL(__alloc_skb);
+EXPORT_SYMBOL(__netdev_alloc_skb);
EXPORT_SYMBOL(pskb_copy);
EXPORT_SYMBOL(pskb_expand_head);
EXPORT_SYMBOL(skb_checksum);
git://git.onelab.eu / linux-2.6.git / blobdiff