linux-master/crypto/zstd.c

32 static int zstd_comp_init(struct zstd_ctx *ctx)
38 	ctx->cwksp = vzalloc(wksp_size);
39 	if (!ctx->cwksp) {
44 	ctx->cctx = zstd_init_cctx(ctx->cwksp, wksp_size);
45 	if (!ctx->cctx) {
52 	vfree(ctx->cwksp);
56 static int zstd_decomp_init(struct zstd_ctx *ctx)
61 	ctx->dwksp = vzalloc(wksp_size);
62 	if (!ctx->dwksp) {
67 	ctx->dctx = zstd_init_dctx(ctx->dwksp, wksp_size);
68 	if (!ctx->dctx) {
75 	vfree(ctx->dwksp);
79 static void zstd_comp_exit(struct zstd_ctx *ctx)
81 	vfree(ctx->cwksp);
82 	ctx->cwksp = NULL;
83 	ctx->cctx = NULL;
86 static void zstd_decomp_exit(struct zstd_ctx *ctx)
88 	vfree(ctx->dwksp);
89 	ctx->dwksp = NULL;
90 	ctx->dctx = NULL;
93 static int __zstd_init(void *ctx)
97 	ret = zstd_comp_init(ctx);
100 	ret = zstd_decomp_init(ctx);
102 		zstd_comp_exit(ctx);
109 	struct zstd_ctx *ctx;
111 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
112 	if (!ctx)
115 	ret = __zstd_init(ctx);
117 		kfree(ctx);
121 	return ctx;
126 	struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
128 	return __zstd_init(ctx);
131 static void __zstd_exit(void *ctx)
133 	zstd_comp_exit(ctx);
134 	zstd_decomp_exit(ctx);
137 static void zstd_free_ctx(struct crypto_scomp *tfm, void *ctx)
139 	__zstd_exit(ctx);
140 	kfree_sensitive(ctx);
145 	struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
147 	__zstd_exit(ctx);
151 			   u8 *dst, unsigned int *dlen, void *ctx)
154 	struct zstd_ctx *zctx = ctx;
167 	struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
169 	return __zstd_compress(src, slen, dst, dlen, ctx);
174 			  void *ctx)
176 	return __zstd_compress(src, slen, dst, dlen, ctx);
180 			     u8 *dst, unsigned int *dlen, void *ctx)
183 	struct zstd_ctx *zctx = ctx;
195 	struct zstd_ctx *ctx = crypto_tfm_ctx(tfm);
197 	return __zstd_decompress(src, slen, dst, dlen, ctx);
202 			    void *ctx)
204 	return __zstd_decompress(src, slen, dst, dlen, ctx);