diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 262efdbc346b..d8f7d74d5a4d 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -781,6 +781,31 @@ struct sk_buff *alloc_skb_with_frags(unsigned long header_len, int *errcode, gfp_t gfp_mask); +/* Layout of fast clones : [skb1][skb2][fclone_ref] */ +struct sk_buff_fclones { + struct sk_buff skb1; + + struct sk_buff skb2; + + atomic_t fclone_ref; +}; + +/** + * skb_fclone_busy - check if fclone is busy + * @skb: buffer + * + * Returns true is skb is a fast clone, and its clone is not freed. + */ +static inline bool skb_fclone_busy(const struct sk_buff *skb) +{ + const struct sk_buff_fclones *fclones; + + fclones = container_of(skb, struct sk_buff_fclones, skb1); + + return skb->fclone == SKB_FCLONE_ORIG && + fclones->skb2.fclone == SKB_FCLONE_CLONE; +} + static inline struct sk_buff *alloc_skb_fclone(unsigned int size, gfp_t priority) { |