'\" t
.\"     Title: skb_unshare
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SKB_UNSHARE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Linux Networking"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
skb_unshare \- make a copy of a shared buffer
.SH "SYNOPSIS"
.HP \w'struct\ sk_buff\ *\ skb_unshare('u
.BI "struct sk_buff * skb_unshare(struct\ sk_buff\ *\ " "skb" ", gfp_t\ " "pri" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
buffer to check
.RE
.PP
\fIpri\fR
.RS 4
priority for memory allocation
.RE
.SH "DESCRIPTION"
.PP
If the socket buffer is a clone then this function creates a new copy of the data, drops a reference count on the old copy and returns the new copy with the reference count at 1\&. If the buffer is not a clone the original buffer is returned\&. When called with a spinlock held or from interrupt state
\fIpri\fR
must be
\fBGFP_ATOMIC\fR
.PP
\fBNULL\fR
is returned on a memory allocation failure\&.
.SH "COPYRIGHT"
.br