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>skb_copy_expand</SPAN
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><H2
>Name</H2
>skb_copy_expand -- copy and expand sk_buff
</DIV
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>Synopsis</H2
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><P
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><P
><CODE
><CODE
CLASS="FUNCDEF"
>struct sk_buff * <TT
CLASS="FUNCTION"
>skb_copy_expand </TT
></CODE
>(const struct sk_buff * <TT
CLASS="PARAMETER"
><I
>skb</I
></TT
>, int <TT
CLASS="PARAMETER"
><I
>newheadroom</I
></TT
>, int <TT
CLASS="PARAMETER"
><I
>newtailroom</I
></TT
>, int <TT
CLASS="PARAMETER"
><I
>gfp_mask</I
></TT
>);</CODE
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><H2
>Arguments</H2
><P
></P
><DIV
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><DL
><DT
><TT
CLASS="PARAMETER"
><I
>skb</I
></TT
></DT
><DD
><P
> buffer to copy
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>newheadroom</I
></TT
></DT
><DD
><P
> new free bytes at head
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>newtailroom</I
></TT
></DT
><DD
><P
> new free bytes at tail
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>gfp_mask</I
></TT
></DT
><DD
><P
> allocation priority
</P
></DD
></DL
></DIV
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><A
NAME="AEN6107"
></A
><H2
>Description</H2
><P
> Make a copy of both an &sk_buff and its data and while doing so
allocate additional space.
</P
><P
> This is used when the caller wishes to modify the data and needs a
private copy of the data to alter as well as more space for new fields.
Returns <TT
CLASS="CONSTANT"
>NULL</TT
> on failure or the pointer to the buffer
on success. The returned buffer has a reference count of 1.
</P
><P
> You must pass <TT
CLASS="CONSTANT"
>GFP_ATOMIC</TT
> as the allocation priority if this function
is called from an interrupt.
</P
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