xref: /freebsd/sys/geom/uzip/g_uzip_lzma.c (revision 55620f43deef5c0eb5b4b0f675de18b30c8d1c2d)
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/cdefs.h>
31 __FBSDID("$FreeBSD$");
32 
33 #include <sys/types.h>
34 #include <sys/malloc.h>
35 
36 #include <contrib/xz-embedded/linux/include/linux/xz.h>
37 
38 #include <geom/uzip/g_uzip.h>
39 #include <geom/uzip/g_uzip_dapi.h>
40 #include <geom/uzip/g_uzip_lzma.h>
41 
42 struct g_uzip_lzma {
43 	struct g_uzip_dapi pub;
44 	/* XZ decoder structs */
45 	struct xz_buf b;
46 	struct xz_dec *s;
47 };
48 
49 static int g_uzip_lzma_nop(struct g_uzip_dapi *, const char *);
50 
51 static void
52 g_uzip_lzma_free(struct g_uzip_dapi *lzpp)
53 {
54 	struct g_uzip_lzma *lzp;
55 
56 	lzp = (struct g_uzip_lzma *)lzpp->pvt;
57 	if (lzp->s != NULL) {
58 		xz_dec_end(lzp->s);
59 		lzp->s = NULL;
60 	}
61 
62 	free(lzp, M_GEOM_UZIP);
63 }
64 
65 static int
66 g_uzip_lzma_decompress(struct g_uzip_dapi *lzpp, const char *gp_name,
67     void *ibp, size_t ilen, void *obp)
68 {
69 	struct g_uzip_lzma *lzp;
70 	int err;
71 
72 	lzp = (struct g_uzip_lzma *)lzpp->pvt;
73 
74 	lzp->b.in = ibp;
75 	lzp->b.out = obp;
76 	lzp->b.in_pos = lzp->b.out_pos = 0;
77 	lzp->b.in_size = ilen;
78 	lzp->b.out_size = (size_t)-1;
79 	err = (xz_dec_run(lzp->s, &lzp->b) != XZ_STREAM_END) ? 1 : 0;
80 	/* TODO decoder recovery, if needed */
81 
82 	return (err);
83 }
84 
85 struct g_uzip_dapi *
86 g_uzip_lzma_ctor(uint32_t blksz)
87 {
88 	struct g_uzip_lzma *lzp;
89 
90 	lzp = malloc(sizeof(struct g_uzip_lzma), M_GEOM_UZIP, M_WAITOK);
91 	xz_crc32_init();
92 	lzp->s = xz_dec_init(XZ_SINGLE, 0);
93 	if (lzp->s == NULL) {
94 		goto e1;
95 	}
96 	lzp->pub.decompress = &g_uzip_lzma_decompress;
97 	lzp->pub.free = &g_uzip_lzma_free;
98 	lzp->pub.rewind = &g_uzip_lzma_nop;
99 	lzp->pub.pvt = lzp;
100 	return (&lzp->pub);
101 e1:
102         free(lzp, M_GEOM_UZIP);
103         return (NULL);
104 }
105 
106 static int
107 g_uzip_lzma_nop(struct g_uzip_dapi *zpp, const char *gp_name)
108 {
109 
110         return (0);
111 }
112