X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=store.h;h=a959cce9107f6666a5953e5a3259f69b182d54df;hb=893aa36d4dee18cc85843c441219c8e177282e79;hp=72fde52fcb2fb1b7d60b2712e9b12670e29a9ee6;hpb=3addc0c5e928bc7b0fc6ff1ef8b7dff7263cf3ea;p=cumulus.git

diff --git a/store.h b/store.h
index 72fde52..a959cce 100644
--- a/store.h
+++ b/store.h
@@ -3,14 +3,12 @@
  *
  * Backup data is stored in a collection of objects, which are grouped together
  * into segments for storage purposes.  This implementation of the object store
- * is built on top of libtar, and represents segments as TAR files and objects
- * as files within them. */
+ * represents segments as TAR files and objects as files within them. */
 
 #ifndef _LBS_STORE_H
 #define _LBS_STORE_H
 
 #include <stdint.h>
-#include <libtar.h>
 
 #include <list>
 #include <map>
@@ -19,6 +17,7 @@
 #include <iostream>
 #include <sstream>
 
+#include "localdb.h"
 #include "sha1.h"
 #include "ref.h"
 
@@ -41,6 +40,30 @@ public:
     std::string getError() const { return error; }
 };
 
+/* Simplified TAR header--we only need to store regular files, don't need to
+ * handle long filenames, etc. */
+static const int TAR_BLOCK_SIZE = 512;
+
+struct tar_header
+{
+    char name[100];
+    char mode[8];
+    char uid[8];
+    char gid[8];
+    char size[12];
+    char mtime[12];
+    char chksum[8];
+    char typeflag;
+    char linkname[100];
+    char magic[8];
+    char uname[32];
+    char gname[32];
+    char devmajor[8];
+    char devminor[8];
+    char prefix[155];
+    char padding[12];
+};
+
 /* A simple wrapper around a single TAR file to represent a segment.  Objects
  * may only be written out all at once, since the tar header must be written
  * first; incremental writing is not supported. */
@@ -61,17 +84,21 @@ public:
 private:
     size_t size;
     std::string segment_name;
-    TAR *t;
 
     /* Filter support. */
     int real_fd, filter_fd;
     pid_t filter_pid;
+
+    // Write data to the tar file
+    void tar_write(const char *data, size_t size);
 };
 
 class TarSegmentStore {
 public:
     // New segments will be stored in the given directory.
-    TarSegmentStore(const std::string &path) { this->path = path; }
+    TarSegmentStore(const std::string &path,
+                    LocalDb *db = NULL)
+        { this->path = path; this->db = db; }
     ~TarSegmentStore() { sync(); }
 
     // Writes an object to segment in the store, and returns the name
@@ -84,15 +111,21 @@ public:
     // Ensure all segments have been fully written.
     void sync();
 
+    // Dump statistics to stdout about how much data has been written
+    void dump_stats();
+
 private:
     struct segment_info {
         Tarfile *file;
         std::string name;           // UUID
         int count;                  // Objects written to this segment
+        std::string basename;       // Name of segment without directory
+        std::string fullname;       // Full path to stored segment
     };
 
     std::string path;
     std::map<std::string, struct segment_info *> segments;
+    LocalDb *db;
 
     // Ensure that all segments in the given group have been fully written.
     void close_segment(const std::string &group);