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Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h73
1 files changed, 58 insertions, 15 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5fd389162f01..b47b3f039d14 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -15,6 +15,7 @@
#define _LINUX_SKBUFF_H
#include <linux/kernel.h>
+#include <linux/kmemcheck.h>
#include <linux/compiler.h>
#include <linux/time.h>
#include <linux/cache.h>
@@ -189,20 +190,23 @@ struct skb_shared_info {
atomic_t dataref;
unsigned short nr_frags;
unsigned short gso_size;
+#ifdef CONFIG_HAS_DMA
+ dma_addr_t dma_head;
+#endif
/* Warning: this field is not always filled in (UFO)! */
unsigned short gso_segs;
unsigned short gso_type;
__be32 ip6_frag_id;
union skb_shared_tx tx_flags;
-#ifdef CONFIG_HAS_DMA
- unsigned int num_dma_maps;
-#endif
struct sk_buff *frag_list;
struct skb_shared_hwtstamps hwtstamps;
skb_frag_t frags[MAX_SKB_FRAGS];
#ifdef CONFIG_HAS_DMA
- dma_addr_t dma_maps[MAX_SKB_FRAGS + 1];
+ dma_addr_t dma_maps[MAX_SKB_FRAGS];
#endif
+ /* Intermediate layers must ensure that destructor_arg
+ * remains valid until skb destructor */
+ void * destructor_arg;
};
/* We divide dataref into two halves. The higher 16 bits hold references
@@ -261,7 +265,7 @@ typedef unsigned char *sk_buff_data_t;
* @transport_header: Transport layer header
* @network_header: Network layer header
* @mac_header: Link layer header
- * @dst: destination entry
+ * @_skb_dst: destination entry
* @sp: the security path, used for xfrm
* @cb: Control buffer. Free for use by every layer. Put private vars here
* @len: Length of actual data
@@ -301,9 +305,6 @@ typedef unsigned char *sk_buff_data_t;
* @tc_verd: traffic control verdict
* @ndisc_nodetype: router type (from link layer)
* @do_not_encrypt: set to prevent encryption of this frame
- * @requeue: set to indicate that the wireless core should attempt
- * a software retry on this frame if we failed to
- * receive an ACK for it
* @dma_cookie: a cookie to one of several possible DMA operations
* done by skb DMA functions
* @secmark: security marking
@@ -319,10 +320,7 @@ struct sk_buff {
ktime_t tstamp;
struct net_device *dev;
- union {
- struct dst_entry *dst;
- struct rtable *rtable;
- };
+ unsigned long _skb_dst;
#ifdef CONFIG_XFRM
struct sec_path *sp;
#endif
@@ -346,6 +344,7 @@ struct sk_buff {
};
};
__u32 priority;
+ kmemcheck_bitfield_begin(flags1);
__u8 local_df:1,
cloned:1,
ip_summed:2,
@@ -356,6 +355,7 @@ struct sk_buff {
ipvs_property:1,
peeked:1,
nf_trace:1;
+ kmemcheck_bitfield_end(flags1);
__be16 protocol;
void (*destructor)(struct sk_buff *skb);
@@ -375,13 +375,16 @@ struct sk_buff {
__u16 tc_verd; /* traffic control verdict */
#endif
#endif
+
+ kmemcheck_bitfield_begin(flags2);
#ifdef CONFIG_IPV6_NDISC_NODETYPE
__u8 ndisc_nodetype:2;
#endif
#if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
__u8 do_not_encrypt:1;
- __u8 requeue:1;
#endif
+ kmemcheck_bitfield_end(flags2);
+
/* 0/13/14 bit hole */
#ifdef CONFIG_NET_DMA
@@ -423,6 +426,21 @@ extern void skb_dma_unmap(struct device *dev, struct sk_buff *skb,
enum dma_data_direction dir);
#endif
+static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
+{
+ return (struct dst_entry *)skb->_skb_dst;
+}
+
+static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
+{
+ skb->_skb_dst = (unsigned long)dst;
+}
+
+static inline struct rtable *skb_rtable(const struct sk_buff *skb)
+{
+ return (struct rtable *)skb_dst(skb);
+}
+
extern void kfree_skb(struct sk_buff *skb);
extern void consume_skb(struct sk_buff *skb);
extern void __kfree_skb(struct sk_buff *skb);
@@ -1062,7 +1080,7 @@ extern void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page,
int off, int size);
#define SKB_PAGE_ASSERT(skb) BUG_ON(skb_shinfo(skb)->nr_frags)
-#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_shinfo(skb)->frag_list)
+#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_has_frags(skb))
#define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb))
#ifdef NET_SKBUFF_DATA_USES_OFFSET
@@ -1701,6 +1719,25 @@ static inline int pskb_trim_rcsum(struct sk_buff *skb, unsigned int len)
skb = skb->prev)
+static inline bool skb_has_frags(const struct sk_buff *skb)
+{
+ return skb_shinfo(skb)->frag_list != NULL;
+}
+
+static inline void skb_frag_list_init(struct sk_buff *skb)
+{
+ skb_shinfo(skb)->frag_list = NULL;
+}
+
+static inline void skb_frag_add_head(struct sk_buff *skb, struct sk_buff *frag)
+{
+ frag->next = skb_shinfo(skb)->frag_list;
+ skb_shinfo(skb)->frag_list = frag;
+}
+
+#define skb_walk_frags(skb, iter) \
+ for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next)
+
extern struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned flags,
int *peeked, int *err);
extern struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags,
@@ -1715,8 +1752,14 @@ extern int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
struct iovec *iov);
extern int skb_copy_datagram_from_iovec(struct sk_buff *skb,
int offset,
- struct iovec *from,
+ const struct iovec *from,
+ int from_offset,
int len);
+extern int skb_copy_datagram_const_iovec(const struct sk_buff *from,
+ int offset,
+ const struct iovec *to,
+ int to_offset,
+ int size);
extern void skb_free_datagram(struct sock *sk, struct sk_buff *skb);
extern int skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
unsigned int flags);