X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Fbluesky.h;h=41618b532ad12b45715db0739c67fd23c8f9907d;hb=7bb8900e1209a2abf3d83e7f06e2dfb314cef61e;hp=74088497db141ef9c471c7f0627685e6114d1151;hpb=98effa493bca2b6e97d98035be602993da27d26b;p=bluesky.git

diff --git a/bluesky/bluesky.h b/bluesky/bluesky.h
index 7408849..41618b5 100644
--- a/bluesky/bluesky.h
+++ b/bluesky/bluesky.h
@@ -17,6 +17,25 @@
 extern "C" {
 #endif
 
+/* Various options to tweak for performance benchmarking purposes. */
+typedef struct {
+    /* Perform all get/put operations synchronously. */
+    int synchronous_stores;
+
+    /* Write data in cache immediately after file is modified. */
+    int writethrough_cache;
+} BlueSkyOptions;
+
+extern BlueSkyOptions bluesky_options;
+
+/* BlueSky status and error codes.  Various frontends should translate these to
+ * the appropriate error code for whatever protocol they implement. */
+typedef enum {
+    BSTATUS_OK = 0,             /* No error */
+    BSTATUS_IOERR,              /* I/O error of some form */
+    BSTATUS_NOENT,              /* File does not exist */
+} BlueSkyStatus;
+
 void bluesky_init(void);
 
 gchar *bluesky_lowercase(const gchar *s);
@@ -30,9 +49,11 @@ typedef struct {
 } BlueSkyRCStr;
 
 BlueSkyRCStr *bluesky_string_new(gpointer data, gsize len);
+BlueSkyRCStr *bluesky_string_new_from_gstring(GString *s);
 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 */
@@ -46,23 +67,6 @@ BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key);
 
 /* Storage interface.  This presents a key-value store abstraction, and can
  * have multiple implementations: in-memory, on-disk, in-cloud. */
-typedef struct {
-    /* Create a new store instance and return a handle to it. */
-    gpointer (*create)();
-
-    /* Clean up any resources used by this store. */
-    void (*destroy)(gpointer store);
-
-    /* Fetch an item with the given name, or return NULL if not found. */
-    BlueSkyRCStr * (*get)(gpointer store, const gchar *key);
-
-    /* Store an item to the given key name. */
-    void (*put)(gpointer store, const gchar *key, BlueSkyRCStr *val);
-} BlueSkyStoreImplementation;
-
-void bluesky_store_register(const BlueSkyStoreImplementation *impl,
-                            const gchar *name);
-
 struct _BlueSkyStore;
 typedef struct _BlueSkyStore BlueSkyStore;
 
@@ -140,6 +144,14 @@ typedef struct {
      * committed to stable storage. */
     uint64_t change_count, change_commit;
 
+    /* Timestamp for controlling when modified data is flushed to stable
+     * storage.  When an inode is first modified from a clean state, this is
+     * set to the current time.  If the inode is clean, it is set to zero. */
+    int64_t change_time;
+
+    /* Additional state for tracking cache writeback status. */
+    uint64_t change_pending;    /* change_count version currently being committed to storage */
+
     int64_t atime;              /* Microseconds since the Unix epoch */
     int64_t ctime;
     int64_t mtime;
@@ -154,6 +166,9 @@ typedef struct {
     GHashTable *dirhash;        /* Hash table by name for LOOKUP */
     GHashTable *dirhash_folded; /* As above, but case-folded */
     uint64_t parent_inum;       /* inode for ".."; 0 if the root directory */
+
+    /* Symlink-specific fields */
+    gchar *symlink_contents;
 } BlueSkyInode;
 
 /* A directory entry.  The name is UTF-8 and is a freshly-allocated string.
@@ -201,13 +216,13 @@ void bluesky_insert_inode(BlueSkyFS *fs, BlueSkyInode *inode);
 void bluesky_dirent_destroy(gpointer dirent);
 uint64_t bluesky_directory_lookup(BlueSkyInode *inode, gchar *name);
 uint64_t bluesky_directory_ilookup(BlueSkyInode *inode, gchar *name);
+BlueSkyDirent *bluesky_directory_read(BlueSkyInode *dir, uint32_t cookie);
 gboolean bluesky_directory_insert(BlueSkyInode *dir, const gchar *name,
                                   uint64_t inum);
 void bluesky_directory_dump(BlueSkyInode *dir);
 
 void bluesky_block_touch(BlueSkyInode *inode, uint64_t i);
 void bluesky_block_fetch(BlueSkyFS *fs, BlueSkyBlock *block);
-void bluesky_block_flush(BlueSkyFS *fs, BlueSkyBlock *block);
 void bluesky_file_truncate(BlueSkyInode *inode, uint64_t size);
 void bluesky_file_write(BlueSkyInode *inode, uint64_t offset,
                         const char *data, gint len);
@@ -220,6 +235,10 @@ void bluesky_inode_fetch(BlueSkyFS *fs, uint64_t inum);
 gint bluesky_dirent_compare(gconstpointer a, gconstpointer b,
                             gpointer unused);
 
+void bluesky_flushd_invoke(BlueSkyFS *fs);
+
+void bluesky_debug_dump(BlueSkyFS *fs);
+
 #ifdef __cplusplus
 }
 #endif