/*
 * xfrm6_mode_transport.c - Transport mode encapsulation for IPv6.
 *
 * Copyright (C) 2002 USAGI/WIDE Project
 * Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/ipv6.h>
#include <net/xfrm.h>

/* Add encapsulation header.
 *
 * The IP header and mutable extension headers will be moved forward to make
 * space for the encapsulation header.
 */
static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
{
	struct ipv6hdr *iph;
	u8 *prevhdr;
	int hdr_len;

	iph = ipv6_hdr(skb);

	hdr_len = x->type->hdr_offset(x, skb, &prevhdr);
	skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data);
	skb_set_network_header(skb, -x->props.header_len);
	skb->transport_header = skb->network_header + hdr_len;
	__skb_pull(skb, hdr_len);
	memmove(ipv6_hdr(skb), iph, hdr_len);
	return 0;
}

/* Remove encapsulation header.
 *
 * The IP header will be moved over the top of the encapsulation header.
 *
 * On entry, skb->h shall point to where the IP header should be and skb->nh
 * shall be set to where the IP header currently is.  skb->data shall point
 * to the start of the payload.
 */
static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
	int ihl = skb->data - skb_transport_header(skb);

	if (skb->transport_header != skb->network_header) {
		memmove(skb_transport_header(skb),
			skb_network_header(skb), ihl);
		skb->network_header = skb->transport_header;
	}
	ipv6_hdr(skb)->payload_len = htons(skb->len + ihl -
					   sizeof(struct ipv6hdr));
	skb_reset_transport_header(skb);
	return 0;
}

static struct xfrm_mode xfrm6_transport_mode = {
	.input = xfrm6_transport_input,
	.output = xfrm6_transport_output,
	.owner = THIS_MODULE,
	.encap = XFRM_MODE_TRANSPORT,
};

static int __init xfrm6_transport_init(void)
{
	return xfrm_register_mode(&xfrm6_transport_mode, AF_INET6);
}

static void __exit xfrm6_transport_exit(void)
{
	int err;

	err = xfrm_unregister_mode(&xfrm6_transport_mode, AF_INET6);
	BUG_ON(err);
}

module_init(xfrm6_transport_init);
module_exit(xfrm6_transport_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_TRANSPORT);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/scsi?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>scsi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_driver.h?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>scsi_driver.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='f50f212749e8a28803af3628acbeb85ee0458ed5'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Florian Fainelli &lt;f.fainelli@gmail.com&gt;</td><td class='right'>2017-01-30 12:41:40 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 15:55:46 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_driver.h?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>f50f212749e8a28803af3628acbeb85ee0458ed5</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/scsi/scsi_driver.h?id=f50f212749e8a28803af3628acbeb85ee0458ed5'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>788d02870180ae1bcb725eec81ca8f53b4568aaa</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/scsi/scsi_driver.h?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>include/scsi/scsi_driver.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/scsi/scsi_driver.h?h=nds-private-remove&amp;id=4be9993493bc7ee3fdf950a83bc050a3e6cf2a45'>4be9993493bc7ee3fdf950a83bc050a3e6cf2a45</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/scsi/scsi_driver.h?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5&amp;id2=4be9993493bc7ee3fdf950a83bc050a3e6cf2a45'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: dsa: Add plumbing for port mirroring</div><div class='commit-msg'>Add necessary plumbing at the slave network device level to have switch
drivers implement ndo_setup_tc() and most particularly the cls_matchall
classifier. We add support for two switch operations:

port_add_mirror and port_del_mirror() which configure, on a per-port
basis the mirror parameters requested from the cls_matchall classifier.

Code is largely borrowed from the Mellanox Spectrum switch driver.

Reviewed-by: Jiri Pirko &lt;jiri@mellanox.com&gt;
Signed-off-by: Florian Fainelli &lt;f.fainelli@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=f50f212749e8a28803af3628acbeb85ee0458ed5'>Diffstat</a> (limited to 'include/scsi/scsi_driver.h')</div><table summary='diffstat' class='diffstat'>