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,
+ BlueSkyRangeset *items);
+
/* 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;
#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_CLOUD 0x02
#define CLOUDLOG_CACHE 0x04
#define CLOUDLOG_UNCOMMITTED 0x10
-struct _BlueSkyCloudLog {
+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;
void bluesky_cloudlog_insert(BlueSkyCloudLog *log);
void bluesky_cloudlog_insert_locked(BlueSkyCloudLog *log);
BlueSkyCloudLog *bluesky_cloudlog_get(BlueSkyFS *fs, BlueSkyCloudID id);
+void bluesky_cloudlog_prefetch(BlueSkyCloudLog *log);
void bluesky_cloudlog_fetch(BlueSkyCloudLog *log);
BlueSkyCloudPointer bluesky_cloudlog_serialize(BlueSkyCloudLog *log,
BlueSkyFS *fs);
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;
gint mapcount; // References to the mmaped data
const char *addr; // May be null if data is not mapped in memory
size_t len;
+ int disk_used;
BlueSkyFS *fs;
BlueSkyLog *log;
gboolean fetching, ready; // Cloud data: downloading or ready for use
int64_t atime; // Access time, for cache management
+ BlueSkyRangeset *items; // Locations of valid items
};
BlueSkyLog *bluesky_log_new(const char *log_directory);
BlueSkyCloudLog *bluesky_log_get_commit_point(BlueSkyFS *fs);
void bluesky_log_write_commit_point(BlueSkyFS *fs, BlueSkyCloudLog *marker);
-BlueSkyRCStr *bluesky_log_map_object(BlueSkyFS *fs, int log_dir, int log_seq,
- int log_offset, int log_size);
+BlueSkyRCStr *bluesky_log_map_object(BlueSkyCloudLog *item, gboolean map_data);
void bluesky_mmap_unref(BlueSkyCacheFile *mmap);
void bluesky_cachefile_unref(BlueSkyCacheFile *cachefile);
BlueSkyCacheFile *bluesky_cachefile_lookup(BlueSkyFS *fs,
- int clouddir, int log_seq);
+ int clouddir, int log_seq,
+ gboolean start_fetch);
void bluesky_cachefile_gc(BlueSkyFS *fs);
void bluesky_replay(BlueSkyFS *fs);