/* TODO: Make this go away entirely. */
BlueSkyFS *bluesky_new_fs(gchar *name);
+void bluesky_inode_free_resources(BlueSkyInode *inode);
+
/* Linked list update functions for LRU lists. */
void bluesky_list_unlink(GList *head, GList *item);
GList *bluesky_list_prepend(GList *head, BlueSkyInode *inode);
void bluesky_serialize_superblock(GString *out, BlueSkyFS *fs);
BlueSkyFS *bluesky_deserialize_superblock(const gchar *buf);
BlueSkyCloudLog *bluesky_serialize_inode(BlueSkyInode *inode);
-gboolean bluesky_deserialize_inode(BlueSkyInode *inode, const gchar *buf);
+gboolean bluesky_deserialize_inode(BlueSkyInode *inode, BlueSkyCloudLog *item);
+
+void bluesky_deserialize_cloudlog(BlueSkyCloudLog *item,
+ const char *data,
+ size_t len);
+
+void bluesky_serialize_cloudlog(BlueSkyCloudLog *log,
+ GString *encrypted,
+ 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. */
/* Clean up any implementation-private data in a BlueSkyStoreAsync. */
void (*cleanup)(gpointer store, BlueSkyStoreAsync *async);
+
+ /* Find the lexicographically-largest file starting with the specified
+ * prefix. */
+ char * (*lookup_last)(gpointer store, const gchar *prefix);
} BlueSkyStoreImplementation;
void bluesky_store_register(const BlueSkyStoreImplementation *impl,
const gchar *name);
+char *bluesky_store_lookup_last(BlueSkyStore *store, const char *prefix);
BlueSkyStoreAsync *bluesky_store_async_new(BlueSkyStore *store);
gpointer bluesky_store_async_get_handle(BlueSkyStoreAsync *async);
void bluesky_store_async_ref(BlueSkyStoreAsync *async);
LOGTYPE_INODE = 2,
LOGTYPE_INODE_MAP = 3,
LOGTYPE_CHECKPOINT = 4,
- LOGTYPE_CHECKPOINT_PTR = 5,
+
+ /* Used only as metadata in the local journal, not loaded as a
+ * BlueSkyCloudLogState nor stored in the cloud */
+ LOGTYPE_JOURNAL_MARKER = 16,
+ LOGTYPE_JOURNAL_CHECKPOINT = 17,
} BlueSkyCloudLogType;
+/* Headers that go on items in local log segments and cloud log segments. */
+struct log_header {
+ uint32_t magic; // HEADER_MAGIC
+ uint8_t type; // Object type + '0'
+ uint32_t offset; // Starting byte offset of the log header
+ uint32_t size1; // Size of the data item (bytes)
+ uint32_t size2; //
+ uint32_t size3; //
+ uint64_t inum; // Inode which owns this data, if any
+ BlueSkyCloudID id; // Object identifier
+} __attribute__((packed));
+
+struct log_footer {
+ uint32_t magic; // FOOTER_MAGIC
+ uint32_t crc; // Computed from log_header to log_footer.magic
+} __attribute__((packed));
+
+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;
+ uint32_t size1, size2, size3;
+} __attribute__((packed));
+
+#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
+#define CLOUDLOG_UNCOMMITTED 0x10
struct _BlueSkyCloudLog {
gint refcount;
GMutex *lock;
uint64_t inum;
int32_t inum_offset;
+ // The size of encrypted object data, not including any headers
+ int data_size;
+
// The location of the object in the cloud, if available.
BlueSkyCloudPointer location;
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,
BlueSkyFS *fs);
BlueSkyLog *bluesky_log_new(const char *log_directory);
void bluesky_log_item_submit(BlueSkyCloudLog *item, BlueSkyLog *log);
void bluesky_log_finish_all(GList *log_items);
+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);
void bluesky_mmap_unref(BlueSkyCacheFile *mmap);
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;
/* A sorted list (by inode number) of InodeMapEntry objects. */
GSequence *map_entries;
- /* The location where this inode map section is stored in the cloud. */
- BlueSkyCloudPointer location;
+ /* The serialized version of the inode map data. */
+ BlueSkyCloudLog *serialized;
/* Have there been changes that require writing this section out again? */
gboolean dirty;
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);
#ifdef __cplusplus
}
projects / bluesky.git / blobdiff