1 files changed, 145 insertions, 0 deletions

diff --git a/include/crypto/compress.h b/include/crypto/compress.h
new file mode 100644
index 000000000000..86163ef24219
--- /dev/null
+++ b/include/crypto/compress.h
@@ -0,0 +1,145 @@
+/*
+ * Compress: Compression algorithms under the cryptographic API.
+ *
+ * Copyright 2008 Sony Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _CRYPTO_COMPRESS_H
+#define _CRYPTO_COMPRESS_H
+
+#include <linux/crypto.h>
+
+
+struct comp_request {
+        const void *next_in;            /* next input byte */
+        void *next_out;                 /* next output byte */
+        unsigned int avail_in;          /* bytes available at next_in */
+        unsigned int avail_out;         /* bytes available at next_out */
+};
+
+enum zlib_comp_params {
+        ZLIB_COMP_LEVEL = 1,            /* e.g. Z_DEFAULT_COMPRESSION */
+        ZLIB_COMP_METHOD,               /* e.g. Z_DEFLATED */
+        ZLIB_COMP_WINDOWBITS,           /* e.g. MAX_WBITS */
+        ZLIB_COMP_MEMLEVEL,             /* e.g. DEF_MEM_LEVEL */
+        ZLIB_COMP_STRATEGY,             /* e.g. Z_DEFAULT_STRATEGY */
+        __ZLIB_COMP_MAX,
+};
+
+#define ZLIB_COMP_MAX   (__ZLIB_COMP_MAX - 1)
+
+
+enum zlib_decomp_params {
+        ZLIB_DECOMP_WINDOWBITS = 1,     /* e.g. DEF_WBITS */
+        __ZLIB_DECOMP_MAX,
+};
+
+#define ZLIB_DECOMP_MAX (__ZLIB_DECOMP_MAX - 1)
+
+
+struct crypto_pcomp {
+        struct crypto_tfm base;
+};
+
+struct pcomp_alg {
+        int (*compress_setup)(struct crypto_pcomp *tfm, void *params,
+                              unsigned int len);
+        int (*compress_init)(struct crypto_pcomp *tfm);
+        int (*compress_update)(struct crypto_pcomp *tfm,
+                               struct comp_request *req);
+        int (*compress_final)(struct crypto_pcomp *tfm,
+                              struct comp_request *req);
+        int (*decompress_setup)(struct crypto_pcomp *tfm, void *params,
+                                unsigned int len);
+        int (*decompress_init)(struct crypto_pcomp *tfm);
+        int (*decompress_update)(struct crypto_pcomp *tfm,
+                                 struct comp_request *req);
+        int (*decompress_final)(struct crypto_pcomp *tfm,
+                                struct comp_request *req);
+
+        struct crypto_alg base;
+};
+
+extern struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
+                                               u32 mask);
+
+static inline struct crypto_tfm *crypto_pcomp_tfm(struct crypto_pcomp *tfm)
+{
+        return &tfm->base;
+}
+
+static inline void crypto_free_pcomp(struct crypto_pcomp *tfm)
+{
+        crypto_destroy_tfm(tfm, crypto_pcomp_tfm(tfm));
+}
+
+static inline struct pcomp_alg *__crypto_pcomp_alg(struct crypto_alg *alg)
+{
+        return container_of(alg, struct pcomp_alg, base);
+}
+
+static inline struct pcomp_alg *crypto_pcomp_alg(struct crypto_pcomp *tfm)
+{
+        return __crypto_pcomp_alg(crypto_pcomp_tfm(tfm)->__crt_alg);
+}
+
+static inline int crypto_compress_setup(struct crypto_pcomp *tfm,
+                                        void *params, unsigned int len)
+{
+        return crypto_pcomp_alg(tfm)->compress_setup(tfm, params, len);
+}
+
+static inline int crypto_compress_init(struct crypto_pcomp *tfm)
+{
+        return crypto_pcomp_alg(tfm)->compress_init(tfm);
+}
+
+static inline int crypto_compress_update(struct crypto_pcomp *tfm,
+                                         struct comp_request *req)
+{
+        return crypto_pcomp_alg(tfm)->compress_update(tfm, req);
+}
+
+static inline int crypto_compress_final(struct crypto_pcomp *tfm,
+                                        struct comp_request *req)
+{
+        return crypto_pcomp_alg(tfm)->compress_final(tfm, req);
+}
+
+static inline int crypto_decompress_setup(struct crypto_pcomp *tfm,
+                                          void *params, unsigned int len)
+{
+        return crypto_pcomp_alg(tfm)->decompress_setup(tfm, params, len);
+}
+
+static inline int crypto_decompress_init(struct crypto_pcomp *tfm)
+{
+        return crypto_pcomp_alg(tfm)->decompress_init(tfm);
+}
+
+static inline int crypto_decompress_update(struct crypto_pcomp *tfm,
+                                           struct comp_request *req)
+{
+        return crypto_pcomp_alg(tfm)->decompress_update(tfm, req);
+}
+
+static inline int crypto_decompress_final(struct crypto_pcomp *tfm,
+                                          struct comp_request *req)
+{
+        return crypto_pcomp_alg(tfm)->decompress_final(tfm, req);
+}
+
+#endif  /* _CRYPTO_COMPRESS_H */