X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Fbluesky-private.h;h=74b4e06784d6a32663b1315c2ea8c86f6b4faab4;hb=52a6a600573a0483ea1aa99ec018e649299ea151;hp=860122839c82f57ee37999a024b23803406ecc0b;hpb=9b1a8397b18ba54e6ad6cc306e1baaecda6fe1fe;p=bluesky.git diff --git a/bluesky/bluesky-private.h b/bluesky/bluesky-private.h index 8601228..74b4e06 100644 --- a/bluesky/bluesky-private.h +++ b/bluesky/bluesky-private.h @@ -33,6 +33,8 @@ extern int bluesky_watermark_high_total; /* 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); @@ -45,7 +47,33 @@ BlueSkyInode *bluesky_list_tail(GList *head); 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); /* Storage layer. Requests can be performed asynchronously, so these objects * help keep track of operations in progress. */ @@ -120,11 +148,16 @@ typedef struct { /* 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); @@ -171,14 +204,49 @@ typedef enum { 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-" + /* 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; @@ -201,6 +269,9 @@ struct _BlueSkyCloudLog { 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; @@ -225,18 +296,24 @@ struct _BlueSkyCloudLogState { BlueSkyCloudPointer location; GList *inode_list; GSList *writeback_list; // Items which are being serialized right now + GList *pending_segments; // Segments which are being uploaded now }; gboolean bluesky_cloudlog_equal(gconstpointer a, gconstpointer b); guint bluesky_cloudlog_hash(gconstpointer a); -BlueSkyCloudLog *bluesky_cloudlog_new(BlueSkyFS *fs); +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); @@ -245,6 +322,7 @@ void bluesky_cloudlog_flush(BlueSkyFS *fs); /* Logging infrastructure for ensuring operations are persistently recorded to * disk. */ #define BLUESKY_CRC32C_SEED (~(uint32_t)0) +#define BLUESKY_CRC32C_VALIDATOR ((uint32_t)0xb798b438UL) uint32_t crc32c(uint32_t crc, const char *buf, unsigned int length); uint32_t crc32c_finalize(uint32_t crc); @@ -266,6 +344,10 @@ struct _BlueSkyLog { /* A count of the disk space consumed (in 1024-byte units) by all files * tracked by mmap_cache (whether mapped or not, actually). */ gint disk_used; + + /* The smallest journal sequence number which may still contain data that + * must be preserved (since it it not yet in the cloud). */ + int journal_watermark; }; /* An object for tracking log files which are stored locally--either the @@ -291,6 +373,9 @@ struct _BlueSkyCacheFile { 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); @@ -300,6 +385,52 @@ BlueSkyCacheFile *bluesky_cachefile_lookup(BlueSkyFS *fs, int clouddir, int log_seq); void bluesky_cachefile_gc(BlueSkyFS *fs); +void bluesky_replay(BlueSkyFS *fs); + +/* Used to track log segments that are being written to the cloud. */ +typedef struct { + BlueSkyRCStr *data; + GSList *items; + GMutex *lock; + GCond *cond; + gboolean complete; +} SerializedRecord; + +/***** Inode map management *****/ + +/* Mapping information for a single inode number. These are grouped together + * into InodeMapRange objects. */ +typedef struct { + uint64_t inum; + + /* 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; + +typedef struct { + /* Starting and ending inode number values that fall in this section. + * Endpoint values are inclusive. */ + uint64_t start, end; + + /* A sorted list (by inode number) of InodeMapEntry objects. */ + GSequence *map_entries; + + /* The serialized version of the inode map data. */ + BlueSkyCloudLog *serialized; + + /* Have there been changes that require writing this section out again? */ + gboolean dirty; +} InodeMapRange; + +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 } #endif