/*
 * uncompress.c
 *
 * (C) Copyright 1999 Linus Torvalds
 *
 * cramfs interfaces to the uncompression library. There's really just
 * three entrypoints:
 *
 *  - cramfs_uncompress_init() - called to initialize the thing.
 *  - cramfs_uncompress_exit() - tell me when you're done
 *  - cramfs_uncompress_block() - uncompress a block.
 *
 * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We
 * only have one stream, and we'll initialize it only once even if it
 * then is used by multiple filesystems.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include <linux/zlib.h>
#include "internal.h"

static z_stream stream;
static int initialized;

/* Returns length of decompressed data. */
int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen)
{
	int err;

	stream.next_in = src;
	stream.avail_in = srclen;

	stream.next_out = dst;
	stream.avail_out = dstlen;

	err = zlib_inflateReset(&stream);
	if (err != Z_OK) {
		pr_err("zlib_inflateReset error %d\n", err);
		zlib_inflateEnd(&stream);
		zlib_inflateInit(&stream);
	}

	err = zlib_inflate(&stream, Z_FINISH);
	if (err != Z_STREAM_END)
		goto err;
	return stream.total_out;

err:
	pr_err("Error %d while decompressing!\n", err);
	pr_err("%p(%d)->%p(%d)\n", src, srclen, dst, dstlen);
	return -EIO;
}

int cramfs_uncompress_init(void)
{
	if (!initialized++) {
		stream.workspace = vmalloc(zlib_inflate_workspacesize());
		if (!stream.workspace) {
			initialized = 0;
			return -ENOMEM;
		}
		stream.next_in = NULL;
		stream.avail_in = 0;
		zlib_inflateInit(&stream);
	}
	return 0;
}

void cramfs_uncompress_exit(void)
{
	if (!--initialized) {
		zlib_inflateEnd(&stream);
		vfree(stream.workspace);
	}
}
4/nl_policy.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/ieee802154/nl_policy.c?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/net/ieee802154/nl_policy.c?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/ieee802154/nl_policy.c?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/ieee802154/nl_policy.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ieee802154?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>ieee802154</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ieee802154/nl_policy.c?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317'>nl_policy.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/ieee802154/nl_policy.c?h=nds-private-remove&amp;id=c86a773c78025f5b825bacd7b846f4fa60dc0317&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/ircomm?h=nds-private-remove&amp;id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/irda/ircomm?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>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=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>4078d3ae27d4ebb85bdcd4d84e9b9a4d059f22bb</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/irda/ircomm?h=nds-private-remove&amp;id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>net/irda/ircomm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/ircomm?h=nds-private-remove&amp;id=751321b3dd5040dc5be19bd23f985e80c914621a'>751321b3dd5040dc5be19bd23f985e80c914621a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/irda/ircomm?h=nds-private-remove&amp;id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=751321b3dd5040dc5be19bd23f985e80c914621a'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/ircomm?h=nds-private-remove&amp;id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/irda/ircomm?h=nds-private-remove&amp;id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=54791b276b4000b307339f269d3bf7db877d536f'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc</div><div class='commit-msg'>Pull sparc fixes from David Miller:
 "Several small bug fixes and tidies, along with a fix for non-resumable
  memory errors triggered by userspace"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Handle PIO &amp; MEM non-resumable errors.
  sparc64: Zero pages on allocation for mondo and error queues.
  sparc: Fixed typo in sstate.c. Replaced panicing with panicking
  sparc: use symbolic names for tsb indexing
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>Diffstat</a> (limited to 'net/irda/ircomm')</div><table summary='diffstat' class='diffstat'>