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.TH "PSKB_EXPAND_HEAD" "9" "09 October 2005" "" ""

.SH NAME
pskb_expand_head \- reallocate header of &sk_buff
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
int pskb_expand_head  (struct sk_buff * \fIskb\fB, int \fInhead\fB, int \fIntail\fB, unsigned int __nocast \fIgfp_mask\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIskb\fB\fR
buffer to reallocate
.TP
\fB\fInhead\fB\fR
room to add at head
.TP
\fB\fIntail\fB\fR
room to add at tail
.TP
\fB\fIgfp_mask\fB\fR
allocation priority
.SH "DESCRIPTION"
.PP
Expands (or creates identical copy, if &nhead and &ntail are zero)
header of skb. &sk_buff itself is not changed. &sk_buff MUST have
reference count of 1. Returns zero in the case of success or error,
if expansion failed. In the last case, &sk_buff is not changed.
.PP
All the pointers pointing into skb header may change and must be
reloaded after call to this function.