'\" t
.\"     Title: skb_copy_ubufs
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: September 2017
.\"    Manual: Linux Networking
.\"    Source: Kernel Hackers Manual 4.12.13
.\"  Language: English
.\"
.TH "SKB_COPY_UBUFS" "9" "September 2017" "Kernel Hackers Manual 4\&.12\&" "Linux Networking"
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.SH "NAME"
skb_copy_ubufs \- copy userspace skb frags buffers to kernel
.SH "SYNOPSIS"
.HP \w'int\ skb_copy_ubufs('u
.BI "int skb_copy_ubufs(struct\ sk_buff\ *\ " "skb" ", gfp_t\ " "gfp_mask" ");"
.SH "ARGUMENTS"
.PP
\fIstruct sk_buff * skb\fR
.RS 4
the skb to modify
.RE
.PP
\fIgfp_t gfp_mask\fR
.RS 4
allocation priority
.RE
.SH "DESCRIPTION"
.PP
This must be called on SKBTX_DEV_ZEROCOPY skb\&. It will copy all frags into kernel and drop the reference to userspace pages\&.
.PP
If this function is called from an interrupt
\fBgfp_mask\fR
must be
\fBGFP_ATOMIC\fR\&.
.PP
Returns 0 on success or a negative error code on failure to allocate kernel memory to copy to\&.
.SH "COPYRIGHT"
.br