2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/errno.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/sysctl.h>
38 #include <geom/uzip/g_uzip.h>
39 #include <geom/uzip/g_uzip_dapi.h>
40 #include <geom/uzip/g_uzip_zstd.h>
43 * We don't actually need any static-link ABI, just want to use "experimental"
44 * custom malloc/free APIs.
46 #define ZSTD_STATIC_LINKING_ONLY
47 #include <contrib/zstd/lib/zstd.h>
49 FEATURE(geom_uzip_zstd, "g_uzip Zstd support");
52 struct g_uzip_dapi guz_pub;
58 #define container_of(ptr, type, member) \
60 const __typeof(((type *)0)->member) *__p = (ptr); \
61 (type *)((uintptr_t)__p - offsetof(type, member)); \
64 #define to_zstd_softc(zpp) container_of(zpp, struct g_uzip_zstd, guz_pub)
67 guz_zstd_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *input,
68 size_t ilen, void *outputbuf)
70 struct g_uzip_zstd *sc;
73 sc = to_zstd_softc(zpp);
74 rc = ZSTD_decompressDCtx(sc->guz_dctx, outputbuf, sc->guz_blksz, input,
76 if (ZSTD_isError(rc)) {
77 printf("%s: UZIP(zstd) decompress failed: %s\n", gp_name,
78 ZSTD_getErrorName(rc));
81 KASSERT(rc == sc->guz_blksz, ("%s: Expected %u bytes, got %zu",
82 __func__, sc->guz_blksz, rc));
87 guz_zstd_free(struct g_uzip_dapi *zpp)
89 struct g_uzip_zstd *sc;
92 sc = to_zstd_softc(zpp);
93 rc = ZSTD_freeDCtx(sc->guz_dctx);
95 printf("%s: UZIP(zstd) free failed: %s\n", __func__,
96 ZSTD_getErrorName(rc));
98 free(sc, M_GEOM_UZIP);
102 guz_zstd_rewind(struct g_uzip_dapi *zpp, const char *gp_name)
104 struct g_uzip_zstd *sc;
107 sc = to_zstd_softc(zpp);
108 rc = ZSTD_DCtx_reset(sc->guz_dctx, ZSTD_reset_session_and_parameters);
109 if (ZSTD_isError(rc)) {
110 printf("%s: UZIP(zstd) rewind failed: %s\n", gp_name,
111 ZSTD_getErrorName(rc));
118 zstd_alloc(void *opaque, size_t size)
120 return (malloc(size, opaque, M_WAITOK));
124 zstd_free(void *opaque, void *address)
126 free(address, opaque);
129 static const ZSTD_customMem zstd_guz_alloc = {
130 .customAlloc = zstd_alloc,
131 .customFree = zstd_free,
132 .opaque = M_GEOM_UZIP,
136 g_uzip_zstd_ctor(uint32_t blksz)
138 struct g_uzip_zstd *sc;
140 sc = malloc(sizeof(*sc), M_GEOM_UZIP, M_WAITOK | M_ZERO);
142 sc->guz_dctx = ZSTD_createDCtx_advanced(zstd_guz_alloc);
143 if (sc->guz_dctx == NULL) {
144 printf("%s: ZSTD_createDCtx_advanced failed\n", __func__);
145 free(sc, M_GEOM_UZIP);
149 sc->guz_blksz = blksz;
150 sc->guz_pub.max_blen = ZSTD_compressBound(blksz);
151 sc->guz_pub.decompress = guz_zstd_decompress;
152 sc->guz_pub.free = guz_zstd_free;
153 sc->guz_pub.rewind = guz_zstd_rewind;
154 sc->guz_pub.pvt = NULL;
156 return (&sc->guz_pub);