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. */
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. */
GHashTable *inodes; /* Cached inodes */
uint64_t next_inum; /* Next available inode for allocation */
- struct S3Store *store;
+ BlueSkyStore *store;
uint8_t *encryption_key;
} BlueSkyFS;
* that we don't exhaust the identifier space. */
uint64_t inum;
- uint64_t change_count; /* Incremented each with each change made */
+ /* change_count is increased with every operation which modifies the inode,
+ * and can be used to determine if cached data is still valid.
+ * change_commit is the value of change_count when the inode was last
+ * committed to stable storage. */
+ uint64_t change_count, change_commit;
+
int64_t atime; /* Microseconds since the Unix epoch */
int64_t ctime;
int64_t mtime;
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_inode_fetch(BlueSkyFS *fs, uint64_t inum);
+void bluesky_serialize_inode(GString *out, BlueSkyInode *inode);
+BlueSkyInode *bluesky_deserialize_inode(BlueSkyFS *fs, const gchar *buf);
+
+gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
+ gpointer unused);
#ifdef __cplusplus
}