extern "C" {
#endif
-struct S3Store;
+void bluesky_init(void);
/* Reference-counted blocks of memory, used for passing data in and out of
* storage backends and in other places. */
void bluesky_string_unref(BlueSkyRCStr *string);
BlueSkyRCStr *bluesky_string_dup(BlueSkyRCStr *string);
+/* Cryptographic operations. */
+#define CRYPTO_BLOCK_SIZE 16 /* 128-bit AES */
+#define CRYPTO_KEY_SIZE 16
+
+void bluesky_crypt_init();
+void bluesky_crypt_random_bytes(guchar *buf, gint len);
+BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key);
+BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key);
+
+/* Storage interface. This presents a key-value store abstraction, and can
+ * have multiple implementations: in-memory, on-disk, in-cloud. */
+typedef struct {
+ /* Create a new store instance and return a handle to it. */
+ gpointer (*create)();
+
+ /* Clean up any resources used by this store. */
+ void (*destroy)(gpointer store);
+
+ /* Fetch an item with the given name, or return NULL if not found. */
+ BlueSkyRCStr * (*get)(gpointer store, const gchar *key);
+
+ /* Store an item to the given key name. */
+ void (*put)(gpointer store, const gchar *key, BlueSkyRCStr *val);
+} BlueSkyStoreImplementation;
+
+void bluesky_store_register(const BlueSkyStoreImplementation *impl,
+ const gchar *name);
+
+struct _BlueSkyStore;
+typedef struct _BlueSkyStore BlueSkyStore;
+
+void bluesky_store_init();
+BlueSkyStore *bluesky_store_new(const gchar *type);
+void bluesky_store_free(BlueSkyStore *store);
+BlueSkyRCStr *bluesky_store_get(BlueSkyStore *store, const gchar *key);
+void bluesky_store_put(BlueSkyStore *store,
+ const gchar *key, BlueSkyRCStr *val);
+
/* File types. The numeric values are chosen to match with those used in
* NFSv3. */
typedef enum {
GHashTable *inodes; /* Cached inodes */
uint64_t next_inum; /* Next available inode for allocation */
- struct S3Store *store;
+ BlueSkyStore *store;
+
+ uint8_t *encryption_key;
} BlueSkyFS;
/* Inode number of the root directory. */
/* In-memory representation of an inode within a Blue Sky server. This
* corresponds roughly with information that is committed to persistent
- * storage. */
+ * storage. Locking/refcounting rules:
+ * - To access or modify any data fields, the lock must be held. This
+ * includes file blocks.
+ * - One reference is held by the BlueSkyFS inode hash table. If that is the
+ * only reference (and the inode is unlocked), the inode is subject to
+ * dropping from the cache.
+ * - Any pending operations should hold extra references to the inode as
+ * appropriate to keep it available until the operation completes.
+ * */
typedef struct {
- gint refcnt; /* May be accessed atomically without lock */
GMutex *lock;
+ gint refcount;
BlueSkyFS *fs;
void bluesky_file_read(BlueSkyInode *inode, uint64_t offset,
char *buf, gint len);
-struct S3Store *s3store_new();
-BlueSkyRCStr *s3store_get(struct S3Store *store, const gchar *key);
-void s3store_put(struct S3Store *store, const gchar *key, BlueSkyRCStr *val);
+void bluesky_inode_flush(BlueSkyFS *fs, BlueSkyInode *inode);
+void bluesky_serialize_inode(GString *out, BlueSkyInode *inode);
#ifdef __cplusplus
}