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-rw-r--r--include/linux/skbuff.h117
1 files changed, 67 insertions, 50 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 77eb60d2b49..e6ba898de61 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -129,8 +129,13 @@ typedef struct skb_frag_struct skb_frag_t;
struct skb_frag_struct {
struct page *page;
+#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
__u32 page_offset;
__u32 size;
+#else
+ __u16 page_offset;
+ __u16 size;
+#endif
};
#define HAVE_HW_TIME_STAMP
@@ -163,26 +168,19 @@ struct skb_shared_hwtstamps {
ktime_t syststamp;
};
-/**
- * struct skb_shared_tx - instructions for time stamping of outgoing packets
- * @hardware: generate hardware time stamp
- * @software: generate software time stamp
- * @in_progress: device driver is going to provide
- * hardware time stamp
- * @prevent_sk_orphan: make sk reference available on driver level
- * @flags: all shared_tx flags
- *
- * These flags are attached to packets as part of the
- * &skb_shared_info. Use skb_tx() to get a pointer.
- */
-union skb_shared_tx {
- struct {
- __u8 hardware:1,
- software:1,
- in_progress:1,
- prevent_sk_orphan:1;
- };
- __u8 flags;
+/* Definitions for tx_flags in struct skb_shared_info */
+enum {
+ /* generate hardware time stamp */
+ SKBTX_HW_TSTAMP = 1 << 0,
+
+ /* generate software time stamp */
+ SKBTX_SW_TSTAMP = 1 << 1,
+
+ /* device driver is going to provide hardware time stamp */
+ SKBTX_IN_PROGRESS = 1 << 2,
+
+ /* ensure the originating sk reference is available on driver level */
+ SKBTX_DRV_NEEDS_SK_REF = 1 << 3,
};
/* This data is invariant across clones and lives at
@@ -195,7 +193,7 @@ struct skb_shared_info {
unsigned short gso_segs;
unsigned short gso_type;
__be32 ip6_frag_id;
- union skb_shared_tx tx_flags;
+ __u8 tx_flags;
struct sk_buff *frag_list;
struct skb_shared_hwtstamps hwtstamps;
@@ -462,19 +460,7 @@ static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
skb->_skb_refdst = (unsigned long)dst;
}
-/**
- * skb_dst_set_noref - sets skb dst, without a reference
- * @skb: buffer
- * @dst: dst entry
- *
- * Sets skb dst, assuming a reference was not taken on dst
- * skb_dst_drop() should not dst_release() this dst
- */
-static inline void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst)
-{
- WARN_ON(!rcu_read_lock_held() && !rcu_read_lock_bh_held());
- skb->_skb_refdst = (unsigned long)dst | SKB_DST_NOREF;
-}
+extern void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst);
/**
* skb_dst_is_noref - Test if skb dst isnt refcounted
@@ -498,13 +484,13 @@ extern struct sk_buff *__alloc_skb(unsigned int size,
static inline struct sk_buff *alloc_skb(unsigned int size,
gfp_t priority)
{
- return __alloc_skb(size, priority, 0, -1);
+ return __alloc_skb(size, priority, 0, NUMA_NO_NODE);
}
static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
gfp_t priority)
{
- return __alloc_skb(size, priority, 1, -1);
+ return __alloc_skb(size, priority, 1, NUMA_NO_NODE);
}
extern bool skb_recycle_check(struct sk_buff *skb, int skb_size);
@@ -558,6 +544,15 @@ extern unsigned int skb_find_text(struct sk_buff *skb, unsigned int from,
unsigned int to, struct ts_config *config,
struct ts_state *state);
+extern __u32 __skb_get_rxhash(struct sk_buff *skb);
+static inline __u32 skb_get_rxhash(struct sk_buff *skb)
+{
+ if (!skb->rxhash)
+ skb->rxhash = __skb_get_rxhash(skb);
+
+ return skb->rxhash;
+}
+
#ifdef NET_SKBUFF_DATA_USES_OFFSET
static inline unsigned char *skb_end_pointer(const struct sk_buff *skb)
{
@@ -578,11 +573,6 @@ static inline struct skb_shared_hwtstamps *skb_hwtstamps(struct sk_buff *skb)
return &skb_shinfo(skb)->hwtstamps;
}
-static inline union skb_shared_tx *skb_tx(struct sk_buff *skb)
-{
- return &skb_shinfo(skb)->tx_flags;
-}
-
/**
* skb_queue_empty - check if a queue is empty
* @list: queue head
@@ -604,7 +594,7 @@ static inline int skb_queue_empty(const struct sk_buff_head *list)
static inline bool skb_queue_is_last(const struct sk_buff_head *list,
const struct sk_buff *skb)
{
- return (skb->next == (struct sk_buff *) list);
+ return skb->next == (struct sk_buff *)list;
}
/**
@@ -617,7 +607,7 @@ static inline bool skb_queue_is_last(const struct sk_buff_head *list,
static inline bool skb_queue_is_first(const struct sk_buff_head *list,
const struct sk_buff *skb)
{
- return (skb->prev == (struct sk_buff *) list);
+ return skb->prev == (struct sk_buff *)list;
}
/**
@@ -1123,7 +1113,7 @@ 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_has_frags(skb))
+#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_has_frag_list(skb))
#define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb))
#ifdef NET_SKBUFF_DATA_USES_OFFSET
@@ -1561,13 +1551,25 @@ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
return skb;
}
-extern struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask);
+/**
+ * __netdev_alloc_page - allocate a page for ps-rx on a specific device
+ * @dev: network device to receive on
+ * @gfp_mask: alloc_pages_node mask
+ *
+ * Allocate a new page. dev currently unused.
+ *
+ * %NULL is returned if there is no free memory.
+ */
+static inline struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask)
+{
+ return alloc_pages_node(NUMA_NO_NODE, gfp_mask, 0);
+}
/**
* netdev_alloc_page - allocate a page for ps-rx on a specific device
* @dev: network device to receive on
*
- * Allocate a new page node local to the specified device.
+ * Allocate a new page. dev currently unused.
*
* %NULL is returned if there is no free memory.
*/
@@ -1787,7 +1789,7 @@ 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)
+static inline bool skb_has_frag_list(const struct sk_buff *skb)
{
return skb_shinfo(skb)->frag_list != NULL;
}
@@ -1987,8 +1989,8 @@ extern void skb_tstamp_tx(struct sk_buff *orig_skb,
static inline void sw_tx_timestamp(struct sk_buff *skb)
{
- union skb_shared_tx *shtx = skb_tx(skb);
- if (shtx->software && !shtx->in_progress)
+ if (skb_shinfo(skb)->tx_flags & SKBTX_SW_TSTAMP &&
+ !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
skb_tstamp_tx(skb, NULL);
}
@@ -2159,7 +2161,7 @@ static inline u16 skb_get_rx_queue(const struct sk_buff *skb)
static inline bool skb_rx_queue_recorded(const struct sk_buff *skb)
{
- return (skb->queue_mapping != 0);
+ return skb->queue_mapping != 0;
}
extern u16 skb_tx_hash(const struct net_device *dev,
@@ -2209,6 +2211,21 @@ static inline void skb_forward_csum(struct sk_buff *skb)
skb->ip_summed = CHECKSUM_NONE;
}
+/**
+ * skb_checksum_none_assert - make sure skb ip_summed is CHECKSUM_NONE
+ * @skb: skb to check
+ *
+ * fresh skbs have their ip_summed set to CHECKSUM_NONE.
+ * Instead of forcing ip_summed to CHECKSUM_NONE, we can
+ * use this helper, to document places where we make this assertion.
+ */
+static inline void skb_checksum_none_assert(struct sk_buff *skb)
+{
+#ifdef DEBUG
+ BUG_ON(skb->ip_summed != CHECKSUM_NONE);
+#endif
+}
+
bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
#endif /* __KERNEL__ */
#endif /* _LINUX_SKBUFF_H */