diff options
Diffstat (limited to 'crypto/deflate.c')
| -rw-r--r-- | crypto/deflate.c | 61 |
1 files changed, 44 insertions, 17 deletions
diff --git a/crypto/deflate.c b/crypto/deflate.c index f942cb391890..94ec3b36a8e8 100644 --- a/crypto/deflate.c +++ b/crypto/deflate.c @@ -43,20 +43,24 @@ struct deflate_ctx { struct z_stream_s decomp_stream; }; -static int deflate_comp_init(struct deflate_ctx *ctx) +static int deflate_comp_init(struct deflate_ctx *ctx, int format) { int ret = 0; struct z_stream_s *stream = &ctx->comp_stream; stream->workspace = vzalloc(zlib_deflate_workspacesize( - -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL)); + MAX_WBITS, MAX_MEM_LEVEL)); if (!stream->workspace) { ret = -ENOMEM; goto out; } - ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED, - -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL, - Z_DEFAULT_STRATEGY); + if (format) + ret = zlib_deflateInit(stream, 3); + else + ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED, + -DEFLATE_DEF_WINBITS, + DEFLATE_DEF_MEMLEVEL, + Z_DEFAULT_STRATEGY); if (ret != Z_OK) { ret = -EINVAL; goto out_free; @@ -68,7 +72,7 @@ out_free: goto out; } -static int deflate_decomp_init(struct deflate_ctx *ctx) +static int deflate_decomp_init(struct deflate_ctx *ctx, int format) { int ret = 0; struct z_stream_s *stream = &ctx->decomp_stream; @@ -78,7 +82,10 @@ static int deflate_decomp_init(struct deflate_ctx *ctx) ret = -ENOMEM; goto out; } - ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS); + if (format) + ret = zlib_inflateInit(stream); + else + ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS); if (ret != Z_OK) { ret = -EINVAL; goto out_free; @@ -102,21 +109,21 @@ static void deflate_decomp_exit(struct deflate_ctx *ctx) vfree(ctx->decomp_stream.workspace); } -static int __deflate_init(void *ctx) +static int __deflate_init(void *ctx, int format) { int ret; - ret = deflate_comp_init(ctx); + ret = deflate_comp_init(ctx, format); if (ret) goto out; - ret = deflate_decomp_init(ctx); + ret = deflate_decomp_init(ctx, format); if (ret) deflate_comp_exit(ctx); out: return ret; } -static void *deflate_alloc_ctx(struct crypto_scomp *tfm) +static void *gen_deflate_alloc_ctx(struct crypto_scomp *tfm, int format) { struct deflate_ctx *ctx; int ret; @@ -125,7 +132,7 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm) if (!ctx) return ERR_PTR(-ENOMEM); - ret = __deflate_init(ctx); + ret = __deflate_init(ctx, format); if (ret) { kfree(ctx); return ERR_PTR(ret); @@ -134,11 +141,21 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm) return ctx; } +static void *deflate_alloc_ctx(struct crypto_scomp *tfm) +{ + return gen_deflate_alloc_ctx(tfm, 0); +} + +static void *zlib_deflate_alloc_ctx(struct crypto_scomp *tfm) +{ + return gen_deflate_alloc_ctx(tfm, 1); +} + static int deflate_init(struct crypto_tfm *tfm) { struct deflate_ctx *ctx = crypto_tfm_ctx(tfm); - return __deflate_init(ctx); + return __deflate_init(ctx, 0); } static void __deflate_exit(void *ctx) @@ -272,7 +289,7 @@ static struct crypto_alg alg = { .coa_decompress = deflate_decompress } } }; -static struct scomp_alg scomp = { +static struct scomp_alg scomp[] = { { .alloc_ctx = deflate_alloc_ctx, .free_ctx = deflate_free_ctx, .compress = deflate_scompress, @@ -282,7 +299,17 @@ static struct scomp_alg scomp = { .cra_driver_name = "deflate-scomp", .cra_module = THIS_MODULE, } -}; +}, { + .alloc_ctx = zlib_deflate_alloc_ctx, + .free_ctx = deflate_free_ctx, + .compress = deflate_scompress, + .decompress = deflate_sdecompress, + .base = { + .cra_name = "zlib-deflate", + .cra_driver_name = "zlib-deflate-scomp", + .cra_module = THIS_MODULE, + } +} }; static int __init deflate_mod_init(void) { @@ -292,7 +319,7 @@ static int __init deflate_mod_init(void) if (ret) return ret; - ret = crypto_register_scomp(&scomp); + ret = crypto_register_scomps(scomp, ARRAY_SIZE(scomp)); if (ret) { crypto_unregister_alg(&alg); return ret; @@ -304,7 +331,7 @@ static int __init deflate_mod_init(void) static void __exit deflate_mod_fini(void) { crypto_unregister_alg(&alg); - crypto_unregister_scomp(&scomp); + crypto_unregister_scomps(scomp, ARRAY_SIZE(scomp)); } module_init(deflate_mod_init); |