Now, new compression APIs are introduced and it has some benefits. Let's support it. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> --- crypto/842.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--- crypto/Kconfig | 1 + 2 files changed, 83 insertions(+), 3 deletions(-) diff --git a/crypto/842.c b/crypto/842.c index 98e387e..47cf7e5 100644 --- a/crypto/842.c +++ b/crypto/842.c @@ -32,10 +32,46 @@ #include <linux/crypto.h> #include <linux/sw842.h> +#include <crypto/compress.h> + struct crypto842_ctx { - char wmem[SW842_MEM_COMPRESS]; /* working memory for compress */ + void *wmem; /* working memory for compress */ }; +static void *crypto842_alloc_ctx(struct crypto_scomp *tfm) +{ + void *ctx; + + ctx = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL); + if (!ctx) + return ERR_PTR(-ENOMEM); + + return ctx; +} + +static int crypto842_init(struct crypto_tfm *tfm) +{ + struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm); + + ctx->wmem = crypto842_alloc_ctx(NULL); + if (IS_ERR(ctx->wmem)) + return -ENOMEM; + + return 0; +} + +static void crypto842_free_ctx(struct crypto_scomp *tfm, void *ctx) +{ + kfree(ctx); +} + +static void crypto842_exit(struct crypto_tfm *tfm) +{ + struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm); + + crypto842_free_ctx(NULL, ctx->wmem); +} + static int crypto842_compress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) @@ -45,6 +81,13 @@ static int crypto842_compress(struct crypto_tfm *tfm, return sw842_compress(src, slen, dst, dlen, ctx->wmem); } +static int crypto842_scompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return sw842_compress(src, slen, dst, dlen, ctx); +} + static int crypto842_decompress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) @@ -52,27 +95,63 @@ static int crypto842_decompress(struct crypto_tfm *tfm, return sw842_decompress(src, slen, dst, dlen); } +static int crypto842_sdecompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return sw842_decompress(src, slen, dst, dlen); +} + static struct crypto_alg alg = { .cra_name = "842", .cra_driver_name = "842-generic", .cra_priority = 100, .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, - .cra_ctxsize = sizeof(struct crypto842_ctx), .cra_module = THIS_MODULE, + .cra_init = crypto842_init, + .cra_exit = crypto842_exit, .cra_u = { .compress = { .coa_compress = crypto842_compress, .coa_decompress = crypto842_decompress } } }; +static struct scomp_alg scomp = { + .alloc_ctx = crypto842_alloc_ctx, + .free_ctx = crypto842_free_ctx, + .compress = crypto842_scompress, + .decompress = crypto842_sdecompress, + .base = { + .cra_name = "842", + .cra_driver_name= "842-scomp", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_SCOMPRESS | + CRYPTO_SCOMP_DECOMP_NOCTX, + .cra_module = THIS_MODULE, + } +}; + static int __init crypto842_mod_init(void) { - return crypto_register_alg(&alg); + int ret; + + ret = crypto_register_alg(&alg); + if (ret) + return ret; + + ret = crypto_register_scomp(&scomp); + if (ret) { + crypto_unregister_alg(&alg); + return ret; + } + + return ret; } module_init(crypto842_mod_init); static void __exit crypto842_mod_exit(void) { crypto_unregister_alg(&alg); + crypto_unregister_scomp(&scomp); } module_exit(crypto842_mod_exit); diff --git a/crypto/Kconfig b/crypto/Kconfig index 2641a60..351b859 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1512,6 +1512,7 @@ config CRYPTO_842 select CRYPTO_ALGAPI select 842_COMPRESS select 842_DECOMPRESS + select CRYPTO_COMPRESS2 help This is the 842 algorithm. -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html