Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   26626 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

SKB_COW_DATA(9)		       Linux Networking		       SKB_COW_DATA(9)

NAME
       skb_cow_data - Check that a socket buffer´s data buffers are writable

SYNOPSIS
       int skb_cow_data(struct sk_buff * skb, int tailbits,
			struct sk_buff ** trailer);

ARGUMENTS
       skb
	   The socket buffer to check.

       tailbits
	   Amount of trailing space to be added

       trailer
	   Returned pointer to the skb where the tailbits space begins

DESCRIPTION
       Make sure that the data buffers attached to a socket buffer are
       writable. If they are not, private copies are made of the data buffers
       and the socket buffer is set to use these instead.

       If tailbits is given, make sure that there is space to write tailbits
       bytes of data beyond current end of socket buffer.  trailer will be set
       to point to the skb in which this space begins.

       The number of scatterlist elements required to completely map the COW´d
       and extended socket buffer will be returned.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		       SKB_COW_DATA(9)

Vote for polarhome