#define _BLUESKY_H
#include <stdint.h>
+#include <stdio.h>
#include <inttypes.h>
#include <glib.h>
/* Various options to tweak for performance benchmarking purposes. */
typedef struct {
- /* Perform all get/put operations synchronously. */
+ /* OBSOLETE: Perform all get/put operations synchronously. */
int synchronous_stores;
- /* Write data in cache immediately after file is modified. */
+ /* OBSOLETE: Write data in cache immediately after file is modified. */
int writethrough_cache;
/* Can inodes be fetched asynchronously? (Inode object is initially
/* Should frontends handle requests serially or allow operations to proceed
* in parallel? */
int sync_frontends;
+
+ /* Target size of the disk cache at the proxy, in kilobytes. */
+ int cache_size;
+
+ /* Full segment fetches (1) or use range requests (0) for fetching segments
+ * from cloud? */
+ int full_segment_fetches;
+
+ /* Disable aggregating of data into log segments. Each object will be
+ * stored in a separate segment. */
+ int disable_aggregation;
+
+ /* Disable cryptography. This is for benchmarking purposes. */
+ int disable_crypto;
+
+ /* Disable aggregation of read requests. Fetch items individually. */
+ int disable_read_aggregation;
} BlueSkyOptions;
extern BlueSkyOptions bluesky_options;
struct bluesky_stats *bluesky_stats_new(const char *name);
void bluesky_stats_add(struct bluesky_stats *stats, int64_t value);
void bluesky_stats_dump_all();
+void bluesky_stats_run_periodic_dump(FILE *f);
/* BlueSky status and error codes. Various frontends should translate these to
* the appropriate error code for whatever protocol they implement. */
gchar *bluesky_lowercase(const gchar *s);
-struct _BlueSkyMmap;
-typedef struct _BlueSkyMmap BlueSkyMmap;
+struct BlueSkyCacheFile;
+typedef struct BlueSkyCacheFile BlueSkyCacheFile;
typedef struct {
gint refcount;
- BlueSkyMmap *mmap;
+ BlueSkyCacheFile *mmap;
gchar *data;
gsize len;
} BlueSkyRCStr;
BlueSkyRCStr *bluesky_string_new(gpointer data, gsize len);
BlueSkyRCStr *bluesky_string_new_from_gstring(GString *s);
-BlueSkyRCStr *bluesky_string_new_from_mmap(BlueSkyMmap *mmap,
+BlueSkyRCStr *bluesky_string_new_from_mmap(BlueSkyCacheFile *mmap,
int offset, gsize len);
void bluesky_string_ref(BlueSkyRCStr *string);
void bluesky_string_unref(BlueSkyRCStr *string);
BlueSkyRCStr *bluesky_string_dup(BlueSkyRCStr *string);
void bluesky_string_resize(BlueSkyRCStr *string, gsize len);
-/* Cryptographic operations. */
-#define CRYPTO_BLOCK_SIZE 16 /* 128-bit AES */
-#define CRYPTO_KEY_SIZE 16
-
-void bluesky_crypt_init();
-void bluesky_crypt_hash_key(const char *keystr, uint8_t *out);
-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);
+struct BlueSkyRangeset;
+typedef struct BlueSkyRangeset BlueSkyRangeset;
+typedef struct {
+ uint64_t start, length;
+ gpointer data;
+} BlueSkyRangesetItem;
+
+BlueSkyRangeset *bluesky_rangeset_new();
+void bluesky_rangeset_free(BlueSkyRangeset *rangeset);
+gboolean bluesky_rangeset_insert(BlueSkyRangeset *rangeset,
+ uint64_t start, uint64_t length,
+ gpointer data);
+const BlueSkyRangesetItem *bluesky_rangeset_lookup(BlueSkyRangeset *rangeset,
+ uint64_t offset);
+const BlueSkyRangesetItem *bluesky_rangeset_lookup_next(BlueSkyRangeset *rangeset, uint64_t offset);
+void bluesky_rangeset_get_extents(BlueSkyRangeset *rangeset,
+ uint64_t *start, uint64_t *length);
/* Storage interface. This presents a key-value store abstraction, and can
* have multiple implementations: in-memory, on-disk, in-cloud. */
-struct _BlueSkyStore;
-typedef struct _BlueSkyStore BlueSkyStore;
+struct BlueSkyStore;
+typedef struct BlueSkyStore BlueSkyStore;
-struct _BlueSkyLog;
-typedef struct _BlueSkyLog BlueSkyLog;
+struct BlueSkyLog;
+typedef struct BlueSkyLog BlueSkyLog;
-struct _BlueSkyCloudLogState;
-typedef struct _BlueSkyCloudLogState BlueSkyCloudLogState;
+struct BlueSkyCloudLogState;
+typedef struct BlueSkyCloudLogState BlueSkyCloudLogState;
-struct _BlueSkyCloudLog;
-typedef struct _BlueSkyCloudLog BlueSkyCloudLog;
+struct BlueSkyCloudLog;
+typedef struct BlueSkyCloudLog BlueSkyCloudLog;
void bluesky_store_init();
BlueSkyStore *bluesky_store_new(const gchar *type);
/* Filesystem state. Each filesystem which is exported is represented by a
* single bluesky_fs structure in memory. */
+struct BlueSkyCryptKeys;
+
typedef struct {
GMutex *lock;
BlueSkyLog *log;
BlueSkyCloudLogState *log_state;
+ /* Filesystem crypto keys */
+ char *master_key;
+ struct BlueSkyCryptKeys *keys;
+
/* Accounting for memory used for caches. Space is measured in blocks, not
- * bytes. We track both total data in the caches and dirty data (total
- * data includes dirty data). Updates to these variables must be made
- * atomically. */
- gint cache_total, cache_dirty;
+ * bytes. Updates to these variables must be made atomically. */
+ gint cache_dirty;
+
+ /* Like above, but tracking data stored in the cloudlog entries
+ * specifically:
+ * - cache_log_dirty: data uncommitted to journal and cloud
+ * - cache_log_writeback: data being written to journal
+ * - cache_log_journal: data committed to journal
+ * - cache_log_cloud: data written to cloud as well
+ * Log entries should progress from the top state to the bottom, and are
+ * only ever counted in one category at a time. */
+ gint cache_log_dirty, cache_log_writeback,
+ cache_log_journal, cache_log_cloud;
/* Linked list of inodes, sorted by access/modification times for cache
* management. Editing these lists is protected by the filesystem lock; to
/* Mutex for the flush daemon, to prevent concurrent execution. */
GMutex *flushd_lock;
+ /* Used to wait for the cache daemon to free up space */
+ GCond *flushd_cond;
+
/* Mapping of object identifiers (blocks, inodes) to physical location (in
* the local cache or in the logs in the cloud). */
GHashTable *locations;
+
+ /* The inode map, which maps inode numbers to the location of the most
+ * recent version. */
+ GSequence *inode_map;
+
+ /* Queue for asynchronous cloudlog unrefs, where needed. */
+ GAsyncQueue *unref_queue;
+
+ /* Thread pool for asynchronous inode fetches */
+ GThreadPool *inode_fetch_thread_pool;
} BlueSkyFS;
/* Inode number of the root directory. */
/* Symlink-specific fields */
gchar *symlink_contents;
+
+ /* A field for short-term use internally while the lock is held. */
+ gpointer private_data;
} BlueSkyInode;
/* A directory entry. The name is UTF-8 and is a freshly-allocated string.
#define BLUESKY_MAX_FILE_SIZE (BLUESKY_BLOCK_SIZE << 24)
typedef enum {
BLUESKY_BLOCK_ZERO = 0, /* Data is all zeroes, not explicitly stored */
- BLUESKY_BLOCK_REF = 1, /* Reference to key/value store, not cached */
- BLUESKY_BLOCK_CACHED = 2, /* Data is cached in memory, clean */
- BLUESKY_BLOCK_DIRTY = 3, /* Data needs to be committed to store */
+ BLUESKY_BLOCK_REF = 1, /* Reference to cloud log item, data clean */
+ BLUESKY_BLOCK_DIRTY = 2, /* Data needs to be committed to store */
} BlueSkyBlockType;
typedef struct {
BlueSkyBlockType type;
- BlueSkyRCStr *data; /* Pointer to data in memory if cached */
- BlueSkyCloudLog *cloudref; /* Reference to cloud log entry with data */
+ BlueSkyCloudLog *ref; /* if REF: cloud log entry with data */
+ BlueSkyRCStr *dirty; /* if DIRTY: raw data in memory */
} BlueSkyBlock;
-BlueSkyFS *bluesky_init_fs(gchar *name, BlueSkyStore *store);
-void bluesky_superblock_flush(BlueSkyFS *fs);
+BlueSkyFS *bluesky_init_fs(gchar *name, BlueSkyStore *store,
+ const gchar *master_key);
gboolean bluesky_inode_is_ready(BlueSkyInode *inode);
char *buf, gint len);
void bluesky_inode_fetch(BlueSkyFS *fs, uint64_t inum);
+void bluesky_inode_prefetch(BlueSkyFS *fs, uint64_t inum);
gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
gpointer unused);
void bluesky_debug_dump(BlueSkyFS *fs);
+/* Request response time tracking. */
+typedef struct BlueSkyProfile {
+ int magic;
+ GMutex *lock;
+ char *description;
+ GList *events;
+} BlueSkyProfile;
+
+BlueSkyProfile *bluesky_profile_new();
+void bluesky_profile_free(BlueSkyProfile *profile);
+void bluesky_profile_add_event(BlueSkyProfile *profile, char *message);
+void bluesky_profile_print(BlueSkyProfile *profile);
+BlueSkyProfile *bluesky_profile_get();
+void bluesky_profile_set(BlueSkyProfile *profile);
+void bluesky_profile_set_output(FILE *stream);
+
#ifdef __cplusplus
}
#endif
projects / bluesky.git / blobdiff