MDEV-17841 S3 storage engine

A read-only storage engine that stores it's data in (aws) S3

To store data in S3 one could use ALTER TABLE:
ALTER TABLE table_name ENGINE=S3

libmarias3 integration done by Sergei Golubchik
libmarias3 created by Andrew Hutchings

libmysqld/libmysql.c

@@ -4920,3 +4920,115 @@ ulong STDCALL mysql_net_field_length(uchar **packet)
 {
   return net_field_length(packet);
 }
+
+/********************************************************************
+  Dummy functions to avoid linking with libmarias3 / libcurl
+*********************************************************************/
+
+#if defined(WITH_S3_STORAGE_ENGINE) || !defined(FIX_BEFORE_RELESE)
+C_MODE_START
+
+#include <stdint.h>
+struct ms3_st;
+typedef struct ms3_st ms3_st;
+struct ms3_list_st;
+typedef struct ms3_list_st ms3_list_st;
+struct ms3_status_st;
+typedef struct ms3_status_st ms3_status_st;
+enum ms3_set_option_t
+{
+  SOME_OPTIONS
+};
+typedef enum ms3_set_option_t ms3_set_option_t;
+typedef void *(*ms3_malloc_callback)(size_t size);
+typedef void (*ms3_free_callback)(void *ptr);
+typedef void *(*ms3_realloc_callback)(void *ptr, size_t size);
+typedef char *(*ms3_strdup_callback)(const char *str);
+typedef void *(*ms3_calloc_callback)(size_t nmemb, size_t size);
+
+
+uint8_t ms3_library_init_malloc(ms3_malloc_callback m,
+                                ms3_free_callback f, ms3_realloc_callback r,
+                                ms3_strdup_callback s, ms3_calloc_callback c)
+{
+  return 1;
+}
+void ms3_library_deinit(void)
+{
+}
+
+ms3_st *ms3_init(const char *s3key, const char *s3secret,
+                 const char *region,
+                 const char *base_domain)
+{
+  return 0;
+}
+
+uint8_t ms3_set_option(ms3_st *ms3, ms3_set_option_t option, void *value)
+{
+  return 0;
+}
+
+void ms3_deinit(ms3_st *ms3)
+{}
+
+const char *ms3_server_error(ms3_st *ms3)
+{
+  return 0;
+}
+const char *ms3_error(uint8_t errcode)
+{
+  return 0;
+}
+
+uint8_t ms3_list(ms3_st *ms3, const char *bucket, const char *prefix,
+                 ms3_list_st **list)
+{
+  return 0;
+}
+
+uint8_t ms3_list_dir(ms3_st *ms3, const char *bucket, const char *prefix,
+                 ms3_list_st **list)
+{
+  return 0;
+}
+
+void ms3_list_free(ms3_list_st *list)
+{}
+
+uint8_t ms3_put(ms3_st *ms3, const char *bucket, const char *key,
+                const uint8_t *data, size_t length)
+{
+  return 1;
+}
+
+uint8_t ms3_get(ms3_st *ms3, const char *bucket, const char *key,
+                uint8_t **data, size_t *length)
+{
+  return 1;
+}
+
+
+void ms3_free(uint8_t *data)
+{}
+
+uint8_t ms3_delete(ms3_st *ms3, const char *bucket, const char *key)
+{
+  return 1;
+}
+
+
+uint8_t ms3_status(ms3_st *ms3, const char *bucket, const char *key,
+                   ms3_status_st *status)
+{
+  return 1;
+}
+
+uint8_t ms3_move(ms3_st *ms3, const char *source_bucket, const char *source_key,
+                 const char *dest_bucket, const char *dest_key)
+{
+  return 1;
+}
+
+C_MODE_END
+#endif /* WITH_S3_STORAGE_ENGINE */