GString *authenticated,
GString *writable);
+/* Cryptographic operations. */
+#define CRYPTO_BLOCK_SIZE 16 /* 128-bit AES */
+#define CRYPTO_KEY_SIZE 16
+#define CRYPTO_HASH_SIZE 32 /* SHA-256 */
+
+typedef struct BlueSkyCryptKeys {
+ uint8_t encryption_key[CRYPTO_KEY_SIZE];
+ uint8_t authentication_key[CRYPTO_HASH_SIZE];
+} BlueSkyCryptKeys;
+
+void bluesky_crypt_init();
+void bluesky_crypt_hash_key(const char *keystr, uint8_t *out);
+void bluesky_crypt_random_bytes(guchar *buf, gint len);
+void bluesky_crypt_derive_keys(BlueSkyCryptKeys *keys, const gchar *master);
+BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key);
+BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key);
+
+void bluesky_crypt_block_encrypt(gchar *cloud_block, size_t len,
+ BlueSkyCryptKeys *keys);
+gboolean bluesky_crypt_block_decrypt(gchar *cloud_block, size_t len,
+ BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_encrypt(GString *segment, BlueSkyCryptKeys *keys);
+void bluesky_cloudlog_decrypt(char *segment, size_t len,
+ BlueSkyCryptKeys *keys);
+
/* Storage layer. Requests can be performed asynchronously, so these objects
* help keep track of operations in progress. */
typedef enum {
} BlueSkyAsyncStatus;
struct BlueSkyNotifierList;
-typedef struct _BlueSkyStoreAsync BlueSkyStoreAsync;
-struct _BlueSkyStoreAsync {
+typedef struct BlueSkyStoreAsync BlueSkyStoreAsync;
+struct BlueSkyStoreAsync {
BlueSkyStore *store;
GMutex *lock;
gchar *key; /* Key to read/write */
BlueSkyRCStr *data; /* Data read/to write */
+ /* For range requests on reads: starting byte offset and length; len 0
+ * implies reading to the end of the object. At completion, the backend
+ * should set range_done if a range read was made; if not set the entire
+ * object was read and the storage layer will select out just the
+ * appropriate bytes. */
+ size_t start, len;
+ gboolean range_done;
+
int result; /* Result code; 0 for success. */
struct BlueSkyNotifierList *notifiers;
gint notifier_count;
struct cloudlog_header {
char magic[4];
+ uint8_t crypt_auth[CRYPTO_HASH_SIZE];
+ uint8_t crypt_iv[CRYPTO_BLOCK_SIZE];
uint8_t type;
BlueSkyCloudID id;
uint64_t inum;
#define JOURNAL_MAGIC "\nLog"
#define CLOUDLOG_MAGIC "AgI-"
+#define CLOUDLOG_MAGIC_ENCRYPTED "AgI=" // CLOUDLOG_MAGIC[3] ^= 0x10
/* A record which tracks an object which has been written to a local log,
* cached, locally, and/or written to the cloud. */
#define CLOUDLOG_JOURNAL 0x01
#define CLOUDLOG_CLOUD 0x02
#define CLOUDLOG_CACHE 0x04
-struct _BlueSkyCloudLog {
+#define CLOUDLOG_UNCOMMITTED 0x10
+struct BlueSkyCloudLog {
gint refcount;
GMutex *lock;
GCond *cond;
};
/* Serialize objects into a log segment to be written to the cloud. */
-struct _BlueSkyCloudLogState {
+struct BlueSkyCloudLogState {
GString *data;
BlueSkyCloudPointer location;
GList *inode_list;
BlueSkyCloudLog *bluesky_cloudlog_new(BlueSkyFS *fs, const BlueSkyCloudID *id);
gchar *bluesky_cloudlog_id_to_string(BlueSkyCloudID id);
BlueSkyCloudID bluesky_cloudlog_id_from_string(const gchar *idstr);
+void bluesky_cloudlog_threads_init(BlueSkyFS *fs);
void bluesky_cloudlog_ref(BlueSkyCloudLog *log);
void bluesky_cloudlog_unref(BlueSkyCloudLog *log);
+void bluesky_cloudlog_unref_delayed(BlueSkyCloudLog *log);
+void bluesky_cloudlog_erase(BlueSkyCloudLog *log);
void bluesky_cloudlog_stats_update(BlueSkyCloudLog *log, int type);
void bluesky_cloudlog_sync(BlueSkyCloudLog *log);
void bluesky_cloudlog_insert(BlueSkyCloudLog *log);
+void bluesky_cloudlog_insert_locked(BlueSkyCloudLog *log);
BlueSkyCloudLog *bluesky_cloudlog_get(BlueSkyFS *fs, BlueSkyCloudID id);
void bluesky_cloudlog_fetch(BlueSkyCloudLog *log);
BlueSkyCloudPointer bluesky_cloudlog_serialize(BlueSkyCloudLog *log,
uint32_t crc32c(uint32_t crc, const char *buf, unsigned int length);
uint32_t crc32c_finalize(uint32_t crc);
-struct _BlueSkyLog {
+struct BlueSkyLog {
BlueSkyFS *fs;
char *log_directory;
GAsyncQueue *queue;
/* An object for tracking log files which are stored locally--either the
* journal for filesystem consistency or log segments which have been fetched
* back from cloud storage. */
-struct _BlueSkyCacheFile {
+struct BlueSkyCacheFile {
GMutex *lock;
GCond *cond;
gint refcount;
typedef struct {
uint64_t inum;
- /* The ID of the most recent version of the inode. */
- BlueSkyCloudID id;
-
- /* The location where that version is written in the cloud. */
- BlueSkyCloudPointer location;
-
- /* If the cloud log entry exists in memory, then a pointer to it, otherwise
- * NULL. */
+ /* A pointer to the cloud log entry for this inode. This may or may not
+ * actually have data loaded (it might just contain pointers to the data
+ * location, and in fact this will likely often be the case). */
BlueSkyCloudLog *item;
} InodeMapEntry;
InodeMapEntry *bluesky_inode_map_lookup(GSequence *inode_map, uint64_t inum,
int action);
BlueSkyCloudLog *bluesky_inode_map_serialize(BlueSkyFS *fs);
+void bluesky_inode_map_minimize(BlueSkyFS *fs);
gboolean bluesky_checkpoint_load(BlueSkyFS *fs);