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skb_dequeue (9)
  • >> skb_dequeue (9) ( Linux man: Ядро )
  •  

    NAME

    __skb_dequeue, skb_dequeue - remove an sk_buff from the head of a list
     
    

    SYNOPSIS

    #include <linux/skbuff.h>
    struct sk_buff *__skb_dequeue(struct sk_buff_head *list);
    struct sk_buff *skb_dequeue(struct sk_buff_head *list);
     

    DESCRIPTION

    The skb_dequeue function removes the head element of an sk_buff_head. It decrements the list qlen pointer, and cleanly detaches the head from the queue. This function should be used instead of performing this task manually, as it provides a clean, standardized way of manipulating an sk_buff_head, and provides interrupt disabling (see NOTES below.)  

    RETURN VALUE

    Returns a pointer to the head element of list, or NULL if list is empty.  

    NOTES

    It is important to note the difference between not only __skb_dequeue and skb_dequeue, but all the __skb_ functions and their skb_ counterparts. Essentially, the __skb_ functions are non-atomic, and should only be used with interrupts disabled. As a convenience, the skb_ functions are provided, which perform interrupt disable / enable wrapper functionality in addition to performing their specific tasks.  

    AVAILABILITY

    Linux 1.0+  

    SEE ALSO

    intro(9), skb_unlink(9), skb_insert(9), skb_queue_head(9), skb_queue_tail(9)

    /usr/src/linux/net/netlink.c /usr/src/linux/net/ax25/af_ax25.c /usr/src/linux/net/core/datagram.c /usr/src/linux/net/ipv4/ipmr.c /usr/src/linux/net/ipv4/tcp.c  

    AUTHOR

    Cyrus Durgin <cider@speakeasy.org>


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    NOTES
    AVAILABILITY
    SEE ALSO
    AUTHOR


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