/* SCTP kernel reference Implementation
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2001-2003 International Business Machines, Corp.
 *
 * This file is part of the SCTP kernel reference Implementation
 *
 * SCTP Checksum functions
 *
 * The SCTP reference implementation 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, or (at your option)
 * any later version.
 *
 * The SCTP reference implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *    Dinakaran Joseph
 *    Jon Grimm <jgrimm@us.ibm.com>
 *    Sridhar Samudrala <sri@us.ibm.com>
 *
 * Rewritten to use libcrc32c by:
 *    Vlad Yasevich <vladislav.yasevich@hp.com>
 */

#ifndef __sctp_checksum_h__
#define __sctp_checksum_h__

#include <linux/types.h>
#include <net/sctp/sctp.h>
#include <linux/crc32c.h>
#include <linux/crc32.h>

static inline __wsum sctp_csum_update(const void *buff, int len, __wsum sum)
{
	/* This uses the crypto implementation of crc32c, which is either
	 * implemented w/ hardware support or resolves to __crc32c_le().
	 */
	return crc32c(sum, buff, len);
}

static inline __wsum sctp_csum_combine(__wsum csum, __wsum csum2,
				       int offset, int len)
{
	return __crc32c_le_combine(csum, csum2, len);
}

static inline __le32 sctp_compute_cksum(const struct sk_buff *skb,
					unsigned int offset)
{
	struct sctphdr *sh = sctp_hdr(skb);
        __le32 ret, old = sh->checksum;
	const struct skb_checksum_ops ops = {
		.update  = sctp_csum_update,
		.combine = sctp_csum_combine,
	};

	sh->checksum = 0;
	ret = cpu_to_le32(~__skb_checksum(skb, offset, skb->len - offset,
					  ~(__u32)0, &ops));
	sh->checksum = old;

	return ret;
}

#endif /* __sctp_checksum_h__ */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>clock</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>exynos-audss-clk.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c14024dbb156c8392908aaa822097d27c6af8ec8'/><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>Jens Axboe &lt;axboe@fb.com&gt;</td><td class='right'>2017-01-27 11:56:06 -0700</td></tr>
<tr><th>committer</th><td>Jens Axboe &lt;axboe@fb.com&gt;</td><td class='right'>2017-01-27 11:56:06 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>c14024dbb156c8392908aaa822097d27c6af8ec8</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>02f6ffa664b16bd76750c05f62708a518de2acdc</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>include/dt-bindings/clock/exynos-audss-clk.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/exynos-audss-clk.h?id=08965c2eba135bdfb6e86cf25308e01421c7e0ce'>08965c2eba135bdfb6e86cf25308e01421c7e0ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8&amp;id2=08965c2eba135bdfb6e86cf25308e01421c7e0ce'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock/exynos-audss-clk.h?id=3b4f18843e511193e7eb616710e838f5852e661d'>3b4f18843e511193e7eb616710e838f5852e661d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock/exynos-audss-clk.h?id=c14024dbb156c8392908aaa822097d27c6af8ec8&amp;id2=3b4f18843e511193e7eb616710e838f5852e661d'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'stable/for-jens-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus</div><div class='commit-msg'>Konrad writes:

Please pull in your 'for-linus' branch two little fixes for Xen
block front:

One fix is for handling the XEN_PAGE_SIZE != PAGE_SIZE (4KB vs 64KB
on ARM for example) mishandling while the other is fixing
the accounting for the configuration changes.
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>Diffstat</a> (limited to 'include/dt-bindings/clock/exynos-audss-clk.h')</div><table summary='diffstat' class='diffstat'>