1/*-
2 * Copyright (c) 2004 Max Khon
3 * Copyright (c) 2014 Juniper Networks, Inc.
4 * Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org>
5 * Copyright (c) 2010-2012 Aleksandr Rybalko
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <sys/malloc.h>
32#include <sys/systm.h>
33
34#include <contrib/xz-embedded/linux/include/linux/xz.h>
35
36#include <geom/uzip/g_uzip.h>
37#include <geom/uzip/g_uzip_dapi.h>
38#include <geom/uzip/g_uzip_lzma.h>
39
40struct g_uzip_lzma {
41	struct g_uzip_dapi pub;
42	uint32_t blksz;
43	/* XZ decoder structs */
44	struct xz_buf b;
45	struct xz_dec *s;
46};
47
48static int g_uzip_lzma_nop(struct g_uzip_dapi *, const char *);
49
50static void
51g_uzip_lzma_free(struct g_uzip_dapi *lzpp)
52{
53	struct g_uzip_lzma *lzp;
54
55	lzp = (struct g_uzip_lzma *)lzpp->pvt;
56	if (lzp->s != NULL) {
57		xz_dec_end(lzp->s);
58		lzp->s = NULL;
59	}
60
61	free(lzp, M_GEOM_UZIP);
62}
63
64static int
65g_uzip_lzma_decompress(struct g_uzip_dapi *lzpp, const char *gp_name,
66    void *ibp, size_t ilen, void *obp)
67{
68	struct g_uzip_lzma *lzp;
69	int err;
70
71	lzp = (struct g_uzip_lzma *)lzpp->pvt;
72
73	lzp->b.in = ibp;
74	lzp->b.out = obp;
75	lzp->b.in_pos = lzp->b.out_pos = 0;
76	lzp->b.in_size = ilen;
77	lzp->b.out_size = lzp->blksz;
78	err = (xz_dec_run(lzp->s, &lzp->b) != XZ_STREAM_END) ? 1 : 0;
79	/* TODO decoder recovery, if needed */
80	if (err != 0) {
81		printf("%s: ibp=%p, obp=%p, in_pos=%jd, out_pos=%jd, "
82		    "in_size=%jd, out_size=%jd\n", __func__, ibp, obp,
83		    (intmax_t)lzp->b.in_pos, (intmax_t)lzp->b.out_pos,
84		    (intmax_t)lzp->b.in_size, (intmax_t)lzp->b.out_size);
85	}
86
87	return (err);
88}
89
90static int
91LZ4_compressBound(int isize)
92{
93
94        return (isize + (isize / 255) + 16);
95}
96
97struct g_uzip_dapi *
98g_uzip_lzma_ctor(uint32_t blksz)
99{
100	struct g_uzip_lzma *lzp;
101
102	lzp = malloc(sizeof(struct g_uzip_lzma), M_GEOM_UZIP, M_WAITOK);
103	lzp->s = xz_dec_init(XZ_SINGLE, 0);
104	if (lzp->s == NULL) {
105		goto e1;
106	}
107	lzp->blksz = blksz;
108	lzp->pub.max_blen = LZ4_compressBound(blksz);
109	lzp->pub.decompress = &g_uzip_lzma_decompress;
110	lzp->pub.free = &g_uzip_lzma_free;
111	lzp->pub.rewind = &g_uzip_lzma_nop;
112	lzp->pub.pvt = lzp;
113	return (&lzp->pub);
114e1:
115        free(lzp, M_GEOM_UZIP);
116        return (NULL);
117}
118
119static int
120g_uzip_lzma_nop(struct g_uzip_dapi *zpp, const char *gp_name)
121{
122
123        return (0);
124}
125