/*
 * Squashfs - a compressed read only filesystem for Linux
 *
 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
 * Phillip Lougher <phillip@squashfs.org.uk>
 *
 * 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,
 * or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * zlib_wrapper.c
 */


#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/zlib.h>
#include <linux/vmalloc.h>

#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
#include "squashfs.h"
#include "decompressor.h"
#include "page_actor.h"

static void *zlib_init(struct squashfs_sb_info *dummy, void *buff)
{
	z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL);
	if (stream == NULL)
		goto failed;
	stream->workspace = vmalloc(zlib_inflate_workspacesize());
	if (stream->workspace == NULL)
		goto failed;

	return stream;

failed:
	ERROR("Failed to allocate zlib workspace\n");
	kfree(stream);
	return ERR_PTR(-ENOMEM);
}


static void zlib_free(void *strm)
{
	z_stream *stream = strm;

	if (stream)
		vfree(stream->workspace);
	kfree(stream);
}


static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
	struct buffer_head **bh, int b, int offset, int length,
	struct squashfs_page_actor *output)
{
	int zlib_err, zlib_init = 0, k = 0;
	z_stream *stream = strm;

	stream->avail_out = PAGE_SIZE;
	stream->next_out = squashfs_first_page(output);
	stream->avail_in = 0;

	do {
		if (stream->avail_in == 0 && k < b) {
			int avail = min(length, msblk->devblksize - offset);
			length -= avail;
			stream->next_in = bh[k]->b_data + offset;
			stream->avail_in = avail;
			offset = 0;
		}

		if (stream->avail_out == 0) {
			stream->next_out = squashfs_next_page(output);
			if (stream->next_out != NULL)
				stream->avail_out = PAGE_SIZE;
		}

		if (!zlib_init) {
			zlib_err = zlib_inflateInit(stream);
			if (zlib_err != Z_OK) {
				squashfs_finish_page(output);
				goto out;
			}
			zlib_init = 1;
		}

		zlib_err = zlib_inflate(stream, Z_SYNC_FLUSH);

		if (stream->avail_in == 0 && k < b)
			put_bh(bh[k++]);
	} while (zlib_err == Z_OK);

	squashfs_finish_page(output);

	if (zlib_err != Z_STREAM_END)
		goto out;

	zlib_err = zlib_inflateEnd(stream);
	if (zlib_err != Z_OK)
		goto out;

	if (k < b)
		goto out;

	return stream->total_out;

out:
	for (; k < b; k++)
		put_bh(bh[k]);

	return -EIO;
}

const struct squashfs_decompressor squashfs_zlib_comp_ops = {
	.init = zlib_init,
	.free = zlib_free,
	.decompress = zlib_uncompress,
	.id = ZLIB_COMPRESSION,
	.name = "zlib",
	.supported = 1
};

net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv6?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>ipv6</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ipv6/ping.c?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>ping.c</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='10bbe7599e2755d3f3e100103967788b8b5a4bce'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:01:28 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:01:28 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv6/ping.c?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>10bbe7599e2755d3f3e100103967788b8b5a4bce</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipv6/ping.c?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>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=10bbe7599e2755d3f3e100103967788b8b5a4bce'>f4d5bc444584dc211c5797be5aad5e861c9181b3</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipv6/ping.c?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>net/ipv6/ping.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv6/ping.c?h=nds-private-remove&amp;id=62906027091f1d02de44041524f0769f60bb9cf3'>62906027091f1d02de44041524f0769f60bb9cf3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv6/ping.c?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce&amp;id2=62906027091f1d02de44041524f0769f60bb9cf3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv6/ping.c?h=nds-private-remove&amp;id=6886fee4d7a3afaf905a8e0bec62dc8fdc39878d'>6886fee4d7a3afaf905a8e0bec62dc8fdc39878d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv6/ping.c?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce&amp;id2=6886fee4d7a3afaf905a8e0bec62dc8fdc39878d'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux</div><div class='commit-msg'>Pull turbostat updates from Len Brown.

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: remove obsolete -M, -m, -C, -c options
  tools/power turbostat: Make extensible via the --add parameter
  tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHz
  tools/power turbostat: line up headers when -M is used
  tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decoding
  tools/power turbostat: Support Knights Mill (KNM)
  tools/power turbostat: Display HWP OOB status
  tools/power turbostat: fix Denverton BCLK
  tools/power turbostat: use intel-family.h model strings
  tools/power/turbostat: Add Denverton RAPL support
  tools/power/turbostat: Add Denverton support
  tools/power/turbostat: split core MSR support into status + limit
  tools/power turbostat: fix error case overflow read of slm_freq_table[]
  tools/power turbostat: Allocate correct amount of fd and irq entries
  tools/power turbostat: switch to tab delimited output
  tools/power turbostat: Gracefully handle ACPI S3
  tools/power turbostat: tidy up output on Joule counter overflow
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>Diffstat</a> (limited to 'net/ipv6/ping.c')</div><table summary='diffstat' class='diffstat'>