linux-imx

/*

 *  Routines having to do with the 'struct sk_buff' memory handlers.

 *

 *  Authors:    Alan Cox <alan@lxorguk.ukuu.org.uk>

 *          Florian La Roche <rzsfl@rz.uni-sb.de>

 *

 *  Fixes:

 *      Alan Cox    :   Fixed the worst of the load

 *                  balancer bugs.

 *      Dave Platt  :   Interrupt stacking fix.

 *  Richard Kooijman    :   Timestamp fixes.

 *      Alan Cox    :   Changed buffer format.

 *      Alan Cox    :   destructor hook for AF_UNIX etc.

 *      Linus Torvalds  :   Better skb_clone.

 *      Alan Cox    :   Added skb_copy.

 *      Alan Cox    :   Added all the changed routines Linus

 *                  only put in the headers

 *      Ray VanTassle   :   Fixed --skb->lock in free

 *      Alan Cox    :   skb_copy copy arp field

 *      Andi Kleen  :   slabified it.

 *      Robert Olsson   :   Removed skb_head_pool

 *

 *  NOTE:

 *      The __skb_ routines should be called with interrupts

 *  disabled, or you better be *real* sure that the operation is atomic

 *  with respect to whatever list is being frobbed (e.g. via lock_sock()

 *  or via disabling bottom half handlers, etc).

 *

 *  This program is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU General Public License

 *  as published by the Free Software Foundation; either version

 *  2 of the License, or (at your option) any later version.

 */

​

/*

 *  The functions in this file will not compile correctly with gcc 2.4.x

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/interrupt.h>

#include <linux/in.h>

#include <linux/inet.h>

#include <linux/slab.h>

#include <linux/tcp.h>

#include <linux/udp.h>

#include <linux/sctp.h>

#include <linux/netdevice.h>

#ifdef CONFIG_NET_CLS_ACT

#include <net/pkt_sched.h>

#endif

#include <linux/string.h>

#include <linux/skbuff.h>

#include <linux/splice.h>

#include <linux/cache.h>

#include <linux/rtnetlink.h>

#include <linux/init.h>

#include <linux/scatterlist.h>

#include <linux/errqueue.h>

#include <linux/prefetch.h>

#include <linux/if_vlan.h>

​

#include <net/protocol.h>

#include <net/dst.h>

#include <net/sock.h>

#include <net/checksum.h>

#include <net/ip6_checksum.h>

#include <net/xfrm.h>

​

#include <linux/uaccess.h>

#include <trace/events/skb.h>

#include <linux/highmem.h>

#include <linux/capability.h>

#include <linux/user_namespace.h>

​

struct kmem_cache *skbuff_head_cache __ro_after_init;

static struct kmem_cache *skbuff_fclone_cache __ro_after_init;

#ifdef CONFIG_SKB_EXTENSIONS

static struct kmem_cache *skbuff_ext_cache __ro_after_init;

#endif

int sysctl_max_skb_frags __read_mostly = MAX_SKB_FRAGS;

EXPORT_SYMBOL(sysctl_max_skb_frags);

​

/**

 *  skb_panic - private function for out-of-line support

 *  @skb:   buffer

 *  @sz:    size

 *  @addr:  address