/*
 * Copyright (c) 2013
 * Phillip Lougher <phillip@squashfs.org.uk>
 *
 * This work is licensed under the terms of the GNU GPL, version 2. See
 * the COPYING file in the top-level directory.
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/percpu.h>
#include <linux/buffer_head.h>

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

/*
 * This file implements multi-threaded decompression using percpu
 * variables, one thread per cpu core.
 */

struct squashfs_stream {
	void		*stream;
};

void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
						void *comp_opts)
{
	struct squashfs_stream *stream;
	struct squashfs_stream __percpu *percpu;
	int err, cpu;

	percpu = alloc_percpu(struct squashfs_stream);
	if (percpu == NULL)
		return ERR_PTR(-ENOMEM);

	for_each_possible_cpu(cpu) {
		stream = per_cpu_ptr(percpu, cpu);
		stream->stream = msblk->decompressor->init(msblk, comp_opts);
		if (IS_ERR(stream->stream)) {
			err = PTR_ERR(stream->stream);
			goto out;
		}
	}

	kfree(comp_opts);
	return (__force void *) percpu;

out:
	for_each_possible_cpu(cpu) {
		stream = per_cpu_ptr(percpu, cpu);
		if (!IS_ERR_OR_NULL(stream->stream))
			msblk->decompressor->free(stream->stream);
	}
	free_percpu(percpu);
	return ERR_PTR(err);
}

void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
{
	struct squashfs_stream __percpu *percpu =
			(struct squashfs_stream __percpu *) msblk->stream;
	struct squashfs_stream *stream;
	int cpu;

	if (msblk->stream) {
		for_each_possible_cpu(cpu) {
			stream = per_cpu_ptr(percpu, cpu);
			msblk->decompressor->free(stream->stream);
		}
		free_percpu(percpu);
	}
}

int squashfs_decompress(struct squashfs_sb_info *msblk, struct buffer_head **bh,
	int b, int offset, int length, struct squashfs_page_actor *output)
{
	struct squashfs_stream __percpu *percpu =
			(struct squashfs_stream __percpu *) msblk->stream;
	struct squashfs_stream *stream = get_cpu_ptr(percpu);
	int res = msblk->decompressor->decompress(msblk, stream->stream, bh, b,
		offset, length, output);
	put_cpu_ptr(stream);

	if (res < 0)
		ERROR("%s decompression failed, data probably corrupt\n",
			msblk->decompressor->name);

	return res;
}

int squashfs_max_decompressors(void)
{
	return num_possible_cpus();
}
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</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/gpu?h=nds-private-remove'>gpu</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'/><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>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2016-10-20 15:44:19 +0200</td></tr>
<tr><th>committer</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2017-02-15 10:34:18 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/gpu?h=nds-private-remove&amp;id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>5db4992d8f040b8d8db0b86d42806e0c417f7ccf</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/gpu?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>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'>5b06e952af482d45f3ade64e77824662e34b7fa2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/gpu?h=nds-private-remove'>Documentation/gpu</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/gpu?h=nds-private-remove&amp;id=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>370ebb0ef6255132373ed35d13e7b1d8d2eb7003</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/gpu?h=nds-private-remove&amp;id2=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>diff</a>)</td></tr></table>
<div class='commit-subject'>usbnet: pegasus: Use net_device_stats from struct net_device<span class='decoration'><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/Documentation/gpu?h=nds-private-remove'>nds-private-remove</a></span></div><div class='commit-msg'>Instead of using a private copy of struct net_device_stats in struct
pegasus, use stats from struct net_device. Also remove the now
unnecessary .ndo_get_stats function.

Cc: Petko Manolov &lt;petkan@nucleusys.com&gt;
Cc: linux-usb@vger.kernel.org
Signed-off-by: Tobias Klauser &lt;tklauser@distanz.ch&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove'>Diffstat</a> (limited to 'Documentation/gpu')</div><table summary='diffstat' class='diffstat'>