X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;ds=sidebyside;f=bluesky.h;h=5571db61edca13bce778d41aed01e70a288a8f77;hb=386250b1e7b69e1050b8eb96402ea764dbc77b25;hp=c85fd708f0fe5f5c18b03925ddfdfab6e5e16c39;hpb=f48181d57295355b68dffdd8fad5729bf952ba7a;p=bluesky.git

diff --git a/bluesky.h b/bluesky.h
index c85fd70..5571db6 100644
--- a/bluesky.h
+++ b/bluesky.h
@@ -12,6 +12,19 @@
 #include <stdint.h>
 #include <glib.h>
 
+/* Reference-counted blocks of memory, used for passing data in and out of
+ * storage backends and in other places. */
+typedef struct {
+    gint refcount;
+    gpointer data;
+    gsize len;
+} BlueSkyRCStr;
+
+BlueSkyRCStr *bluesky_string_new(gpointer data, gsize len);
+void bluesky_string_ref(BlueSkyRCStr *string);
+void bluesky_string_unref(BlueSkyRCStr *string);
+BlueSkyRCStr *bluesky_string_dup(BlueSkyRCStr *string);
+
 /* File types.  The numeric values are chosen to match with those used in
  * NFSv3. */
 typedef enum {
@@ -68,17 +81,19 @@ typedef struct {
     GArray *blocks;
 
     /* Directory-specific fields */
-    GSequence *dirents;
+    GSequence *dirents;         /* List of entries for READDIR */
+    GHashTable *dirhash;        /* Hash table by name for LOOKUP */
     uint64_t parent_inum;       /* inode for ".."; 0 if the root directory */
 } BlueSkyInode;
 
 /* A directory entry.  The name is UTF-8 and is a freshly-allocated string.
- * The name is hashed to a 64-bit value, and the directory entries are sorted
- * by hash value (the hash value can then be used as a cookie for resuming a
- * READDIR call). */
+ * Each directory entry is listed in two indices: dirents is indexed by cookie
+ * and dirhash by name.  The cookie is a randomly-assigned 32-bit value, unique
+ * within the directory, that remains unchanged until the entry is deleted.  It
+ * is used to provide a stable key for restarting a READDIR call. */
 typedef struct {
     gchar *name;
-    uint64_t hash;
+    uint32_t cookie;
     uint64_t inum;
 } BlueSkyDirent;
 
@@ -103,6 +118,7 @@ typedef struct {
 
 BlueSkyFS *bluesky_new_fs(gchar *name);
 int64_t bluesky_get_current_time();
+void bluesky_inode_update_ctime(BlueSkyInode *inode, gboolean update_mtime);
 uint64_t bluesky_fs_alloc_inode(BlueSkyFS *fs);
 BlueSkyInode *bluesky_new_inode(uint64_t inum, BlueSkyFileType type);
 
@@ -116,6 +132,12 @@ gboolean bluesky_directory_insert(BlueSkyInode *dir, gchar *name,
                                   uint64_t inum);
 void bluesky_directory_dump(BlueSkyInode *dir);
 
+void bluesky_block_touch(BlueSkyInode *inode, uint64_t i);
+void bluesky_block_flush(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);
+void bluesky_file_read(BlueSkyInode *inode, uint64_t offset,
+                       char *buf, gint len);
 
 #endif