'\" t
.\"     Title: __pskb_pull_tail
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "__PSKB_PULL_TAIL" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Linux Networking"
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.SH "NAME"
__pskb_pull_tail \- advance tail of skb header
.SH "SYNOPSIS"
.HP \w'unsigned\ char\ *\ __pskb_pull_tail('u
.BI "unsigned char * __pskb_pull_tail(struct\ sk_buff\ *\ " "skb" ", int\ " "delta" ");"
.SH "ARGUMENTS"
.PP
\fIstruct sk_buff * skb\fR
.RS 4
buffer to reallocate
.RE
.PP
\fIint delta\fR
.RS 4
number of bytes to advance tail
.RE
.SH "DESCRIPTION"
.PP
The function makes a sense only on a fragmented &sk_buff, it expands header moving its tail forward and copying necessary data from fragmented part\&.
.PP
&sk_buff MUST have reference count of 1\&.
.PP
Returns
\fBNULL\fR
(and &sk_buff does not change) if pull failed or value of new tail of skb in the case of success\&.
.PP
All the pointers pointing into skb header may change and must be reloaded after call to this function\&.
.SH "COPYRIGHT"
.br