156 lines
4.2 KiB
C
156 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/sysctl.h>
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#include <geom/uzip/g_uzip.h>
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#include <geom/uzip/g_uzip_dapi.h>
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#include <geom/uzip/g_uzip_zstd.h>
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/*
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* We don't actually need any static-link ABI, just want to use "experimental"
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* custom malloc/free APIs.
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*/
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#define ZSTD_STATIC_LINKING_ONLY
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#include <contrib/zstd/lib/zstd.h>
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FEATURE(geom_uzip_zstd, "g_uzip Zstd support");
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struct g_uzip_zstd {
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struct g_uzip_dapi guz_pub;
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uint32_t guz_blksz;
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ZSTD_DCtx *guz_dctx;
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};
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#ifndef container_of
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#define container_of(ptr, type, member) \
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({ \
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const __typeof(((type *)0)->member) *__p = (ptr); \
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(type *)((uintptr_t)__p - offsetof(type, member)); \
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})
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#endif
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#define to_zstd_softc(zpp) container_of(zpp, struct g_uzip_zstd, guz_pub)
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static int
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guz_zstd_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *input,
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size_t ilen, void *outputbuf)
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{
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struct g_uzip_zstd *sc;
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size_t rc;
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sc = to_zstd_softc(zpp);
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rc = ZSTD_decompressDCtx(sc->guz_dctx, outputbuf, sc->guz_blksz, input,
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ilen);
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if (ZSTD_isError(rc)) {
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printf("%s: UZIP(zstd) decompress failed: %s\n", gp_name,
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ZSTD_getErrorName(rc));
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return (EIO);
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}
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KASSERT(rc == sc->guz_blksz, ("%s: Expected %u bytes, got %zu",
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__func__, sc->guz_blksz, rc));
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return (0);
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}
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static void
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guz_zstd_free(struct g_uzip_dapi *zpp)
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{
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struct g_uzip_zstd *sc;
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size_t rc;
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sc = to_zstd_softc(zpp);
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rc = ZSTD_freeDCtx(sc->guz_dctx);
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if (ZSTD_isError(rc))
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printf("%s: UZIP(zstd) free failed: %s\n", __func__,
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ZSTD_getErrorName(rc));
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free(sc, M_GEOM_UZIP);
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}
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static int
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guz_zstd_rewind(struct g_uzip_dapi *zpp, const char *gp_name)
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{
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struct g_uzip_zstd *sc;
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size_t rc;
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sc = to_zstd_softc(zpp);
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rc = ZSTD_DCtx_reset(sc->guz_dctx, ZSTD_reset_session_and_parameters);
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if (ZSTD_isError(rc)) {
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printf("%s: UZIP(zstd) rewind failed: %s\n", gp_name,
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ZSTD_getErrorName(rc));
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return (EIO);
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}
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return (0);
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}
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static void *
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zstd_alloc(void *opaque, size_t size)
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{
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return (malloc(size, opaque, M_WAITOK));
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}
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static void
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zstd_free(void *opaque, void *address)
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{
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free(address, opaque);
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}
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static const ZSTD_customMem zstd_guz_alloc = {
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.customAlloc = zstd_alloc,
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.customFree = zstd_free,
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.opaque = M_GEOM_UZIP,
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};
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struct g_uzip_dapi *
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g_uzip_zstd_ctor(uint32_t blksz)
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{
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struct g_uzip_zstd *sc;
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sc = malloc(sizeof(*sc), M_GEOM_UZIP, M_WAITOK | M_ZERO);
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sc->guz_dctx = ZSTD_createDCtx_advanced(zstd_guz_alloc);
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if (sc->guz_dctx == NULL) {
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printf("%s: ZSTD_createDCtx_advanced failed\n", __func__);
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free(sc, M_GEOM_UZIP);
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return (NULL);
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}
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sc->guz_blksz = blksz;
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sc->guz_pub.max_blen = ZSTD_compressBound(blksz);
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sc->guz_pub.decompress = guz_zstd_decompress;
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sc->guz_pub.free = guz_zstd_free;
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sc->guz_pub.rewind = guz_zstd_rewind;
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sc->guz_pub.pvt = NULL;
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return (&sc->guz_pub);
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}
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