'\" t
.\"     Title: skb_tailroom_reserve
.\"    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_TAILROOM_RESERVE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Linux Networking"
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.SH "NAME"
skb_tailroom_reserve \- adjust reserved_tailroom
.SH "SYNOPSIS"
.HP \w'void\ skb_tailroom_reserve('u
.BI "void skb_tailroom_reserve(struct\ sk_buff\ *\ " "skb" ", unsigned\ int\ " "mtu" ", unsigned\ int\ " "needed_tailroom" ");"
.SH "ARGUMENTS"
.PP
\fIskb\fR
.RS 4
buffer to alter
.RE
.PP
\fImtu\fR
.RS 4
maximum amount of headlen permitted
.RE
.PP
\fIneeded_tailroom\fR
.RS 4
minimum amount of reserved_tailroom
.RE
.SH "DESCRIPTION"
.PP
Set reserved_tailroom so that headlen can be as large as possible but not larger than mtu and tailroom cannot be smaller than needed_tailroom\&. The required headroom should already have been reserved before using this function\&.
.SH "COPYRIGHT"
.br