diff options
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 124 |
1 files changed, 113 insertions, 11 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 9dcf956ad18a..bb1981fd60f3 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -29,9 +29,6 @@ #include <linux/dmaengine.h> #include <linux/hrtimer.h> -#define HAVE_ALLOC_SKB /* For the drivers to know */ -#define HAVE_ALIGNABLE_SKB /* Ditto 8) */ - /* Don't change this without changing skb_csum_unnecessary! */ #define CHECKSUM_NONE 0 #define CHECKSUM_UNNECESSARY 1 @@ -135,6 +132,55 @@ struct skb_frag_struct { __u32 size; }; +#define HAVE_HW_TIME_STAMP + +/** + * struct skb_shared_hwtstamps - hardware time stamps + * @hwtstamp: hardware time stamp transformed into duration + * since arbitrary point in time + * @syststamp: hwtstamp transformed to system time base + * + * Software time stamps generated by ktime_get_real() are stored in + * skb->tstamp. The relation between the different kinds of time + * stamps is as follows: + * + * syststamp and tstamp can be compared against each other in + * arbitrary combinations. The accuracy of a + * syststamp/tstamp/"syststamp from other device" comparison is + * limited by the accuracy of the transformation into system time + * base. This depends on the device driver and its underlying + * hardware. + * + * hwtstamps can only be compared against other hwtstamps from + * the same device. + * + * This structure is attached to packets as part of the + * &skb_shared_info. Use skb_hwtstamps() to get a pointer. + */ +struct skb_shared_hwtstamps { + ktime_t hwtstamp; + 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 + * + * 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; + }; + __u8 flags; +}; + /* This data is invariant across clones and lives at * the end of the header data, ie. at skb->end. */ @@ -146,10 +192,12 @@ struct skb_shared_info { 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]; @@ -373,6 +421,7 @@ extern void skb_dma_unmap(struct device *dev, struct sk_buff *skb, #endif extern void kfree_skb(struct sk_buff *skb); +extern void consume_skb(struct sk_buff *skb); extern void __kfree_skb(struct sk_buff *skb); extern struct sk_buff *__alloc_skb(unsigned int size, gfp_t priority, int fclone, int node); @@ -411,7 +460,8 @@ extern int skb_to_sgvec(struct sk_buff *skb, extern int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer); extern int skb_pad(struct sk_buff *skb, int pad); -#define dev_kfree_skb(a) kfree_skb(a) +#define dev_kfree_skb(a) consume_skb(a) +#define dev_consume_skb(a) kfree_skb_clean(a) extern void skb_over_panic(struct sk_buff *skb, int len, void *here); extern void skb_under_panic(struct sk_buff *skb, int len, @@ -459,6 +509,16 @@ static inline unsigned char *skb_end_pointer(const struct sk_buff *skb) /* Internal */ #define skb_shinfo(SKB) ((struct skb_shared_info *)(skb_end_pointer(SKB))) +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 @@ -1278,7 +1338,7 @@ static inline int skb_network_offset(const struct sk_buff *skb) * The networking layer reserves some headroom in skb data (via * dev_alloc_skb). This is used to avoid having to reallocate skb data when * the header has to grow. In the default case, if the header has to grow - * 16 bytes or less we avoid the reallocation. + * 32 bytes or less we avoid the reallocation. * * Unfortunately this headroom changes the DMA alignment of the resulting * network packet. As for NET_IP_ALIGN, this unaligned DMA is expensive @@ -1286,11 +1346,11 @@ static inline int skb_network_offset(const struct sk_buff *skb) * perhaps setting it to a cacheline in size (since that will maintain * cacheline alignment of the DMA). It must be a power of 2. * - * Various parts of the networking layer expect at least 16 bytes of + * Various parts of the networking layer expect at least 32 bytes of * headroom, you should not reduce this. */ #ifndef NET_SKB_PAD -#define NET_SKB_PAD 16 +#define NET_SKB_PAD 32 #endif extern int ___pskb_trim(struct sk_buff *skb, unsigned int len); @@ -1678,8 +1738,6 @@ extern int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen); extern struct sk_buff *skb_segment(struct sk_buff *skb, int features); -extern int skb_gro_receive(struct sk_buff **head, - struct sk_buff *skb); static inline void *skb_header_pointer(const struct sk_buff *skb, int offset, int len, void *buffer) @@ -1726,6 +1784,11 @@ static inline void skb_copy_to_linear_data_offset(struct sk_buff *skb, extern void skb_init(void); +static inline ktime_t skb_get_ktime(const struct sk_buff *skb) +{ + return skb->tstamp; +} + /** * skb_get_timestamp - get timestamp from a skb * @skb: skb to get stamp from @@ -1735,11 +1798,18 @@ extern void skb_init(void); * This function converts the offset back to a struct timeval and stores * it in stamp. */ -static inline void skb_get_timestamp(const struct sk_buff *skb, struct timeval *stamp) +static inline void skb_get_timestamp(const struct sk_buff *skb, + struct timeval *stamp) { *stamp = ktime_to_timeval(skb->tstamp); } +static inline void skb_get_timestampns(const struct sk_buff *skb, + struct timespec *stamp) +{ + *stamp = ktime_to_timespec(skb->tstamp); +} + static inline void __net_timestamp(struct sk_buff *skb) { skb->tstamp = ktime_get_real(); @@ -1755,6 +1825,20 @@ static inline ktime_t net_invalid_timestamp(void) return ktime_set(0, 0); } +/** + * skb_tstamp_tx - queue clone of skb with send time stamps + * @orig_skb: the original outgoing packet + * @hwtstamps: hardware time stamps, may be NULL if not available + * + * If the skb has a socket associated, then this function clones the + * skb (thus sharing the actual data and optional structures), stores + * the optional hardware time stamping information (if non NULL) or + * generates a software time stamp (otherwise), then queues the clone + * to the error queue of the socket. Errors are silently ignored. + */ +extern void skb_tstamp_tx(struct sk_buff *orig_skb, + struct skb_shared_hwtstamps *hwtstamps); + extern __sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len); extern __sum16 __skb_checksum_complete(struct sk_buff *skb); @@ -1885,7 +1969,7 @@ static inline void skb_set_queue_mapping(struct sk_buff *skb, u16 queue_mapping) skb->queue_mapping = queue_mapping; } -static inline u16 skb_get_queue_mapping(struct sk_buff *skb) +static inline u16 skb_get_queue_mapping(const struct sk_buff *skb) { return skb->queue_mapping; } @@ -1895,6 +1979,24 @@ static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_bu to->queue_mapping = from->queue_mapping; } +static inline void skb_record_rx_queue(struct sk_buff *skb, u16 rx_queue) +{ + skb->queue_mapping = rx_queue + 1; +} + +static inline u16 skb_get_rx_queue(const struct sk_buff *skb) +{ + return skb->queue_mapping - 1; +} + +static inline bool skb_rx_queue_recorded(const struct sk_buff *skb) +{ + return (skb->queue_mapping != 0); +} + +extern u16 skb_tx_hash(const struct net_device *dev, + const struct sk_buff *skb); + #ifdef CONFIG_XFRM static inline struct sec_path *skb_sec_path(struct sk_buff *skb) { |