The map::at method does not always exist, so instead use map::find.

[cumulus.git] / store.cc

diff --git a/store.cc b/store.cc
index 3dcfcb4..9d4c883 100644 (file)
--- a/store.cc
+++ b/store.cc
@@ -1,13 +1,31 @@
-/* LBS: An LFS-inspired filesystem backup system
- * Copyright (C) 2007  Michael Vrable
+/* Cumulus: Smart Filesystem Backup to Dumb Servers
  *
- * Backup data is stored in a collection of objects, which are grouped together
+ * Copyright (C) 2008  The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* Backup data is stored in a collection of objects, which are grouped together
  * into segments for storage purposes.  This implementation of the object store
  * represents segments as TAR files and objects as files within them. */
 
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/resource.h>
@@ -25,10 +43,12 @@
 
 #include "store.h"
 #include "ref.h"
+#include "util.h"
 
 using std::max;
 using std::list;
 using std::map;
+using std::pair;
 using std::set;
 using std::string;
 
@@ -36,16 +56,6 @@ using std::string;
 const char *filter_program = "bzip2 -c";
 const char *filter_extension = ".bz2";
 
-static void cloexec(int fd)
-{
-    long flags = fcntl(fd, F_GETFD);
-
-    if (flags < 0)
-        return;
-
-    fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
-}
-
 Tarfile::Tarfile(RemoteFile *file, const string &segment)
     : size(0),
       segment_name(segment)
@@ -67,14 +77,14 @@ Tarfile::~Tarfile()
     tar_write(buf, TAR_BLOCK_SIZE);
 
     if (close(filter_fd) != 0)
-        throw IOException("Error closing Tarfile");
+        fatal("Error closing Tarfile");
 
     /* ...and wait for filter process to finish. */
     int status;
     waitpid(filter_pid, &status, 0);
 
     if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-        throw IOException("Filter process error");
+        fatal("Filter process error");
     }
 
     close(real_fd);
@@ -91,13 +101,13 @@ int spawn_filter(int fd_out, const char *program, pid_t *filter_pid)
 
     /* Create a pipe for communicating with the filter process. */
     if (pipe(fds) < 0) {
-        throw IOException("Unable to create pipe for filter");
+        fatal("Unable to create pipe for filter");
     }
 
     /* Create a child process which can exec() the filter program. */
     pid = fork();
     if (pid < 0)
-        throw IOException("Unable to fork filter process");
+        fatal("Unable to fork filter process");
 
     if (pid > 0) {
         /* Parent process */
@@ -140,7 +150,7 @@ void Tarfile::tar_write(const char *data, size_t len)
             if (errno == EINTR)
                 continue;
             fprintf(stderr, "Write error: %m\n");
-            throw IOException("Write error");
+            fatal("Write error");
         }
 
         len -= res;
@@ -162,7 +172,7 @@ void Tarfile::write_object(int id, const char *data, size_t len)
     sprintf(header.mode, "%07o", 0600);
     sprintf(header.uid, "%07o", 0);
     sprintf(header.gid, "%07o", 0);
-    sprintf(header.size, "%011o", len);
+    sprintf(header.size, "%011o", (int)len);
     sprintf(header.mtime, "%011o", (int)time(NULL));
     header.typeflag = '0';
     strcpy(header.magic, "ustar  ");
@@ -212,7 +222,8 @@ size_t Tarfile::size_estimate()
 
 static const size_t SEGMENT_SIZE = 4 * 1024 * 1024;
 
-static map<string, int64_t> group_sizes;
+/* Backup size summary: segment type -> (uncompressed size, compressed size) */
+static map<string, pair<int64_t, int64_t> > group_sizes;
 
 ObjectReference TarSegmentStore::write_object(const char *data, size_t len,
                                               const std::string &group)
@@ -225,11 +236,12 @@ ObjectReference TarSegmentStore::write_object(const char *data, size_t len,
         segment = new segment_info;
 
         segment->name = generate_uuid();
+        segment->group = group;
         segment->basename = segment->name + ".tar";
         segment->basename += filter_extension;
         segment->count = 0;
         segment->size = 0;
-        segment->rf = remote->alloc_file(segment->basename);
+        segment->rf = remote->alloc_file(segment->basename, "segments");
         segment->file = new Tarfile(segment->rf, segment->name);
 
         segments[group] = segment;
@@ -245,7 +257,7 @@ ObjectReference TarSegmentStore::write_object(const char *data, size_t len,
     segment->count++;
     segment->size += len;
 
-    group_sizes[group] += len;
+    group_sizes[group].first += len;
 
     ObjectReference ref(segment->name, id_buf);
 
@@ -266,9 +278,10 @@ void TarSegmentStore::sync()
 void TarSegmentStore::dump_stats()
 {
     printf("Data written:\n");
-    for (map<string, int64_t>::iterator i = group_sizes.begin();
+    for (map<string, pair<int64_t, int64_t> >::iterator i = group_sizes.begin();
          i != group_sizes.end(); ++i) {
-        printf("    %s: %lld\n", i->first.c_str(), i->second);
+        printf("    %s: %lld (%lld compressed)\n", i->first.c_str(),
+               (long long)i->second.first, (long long)i->second.second);
     }
 }
 
@@ -285,6 +298,11 @@ void TarSegmentStore::close_segment(const string &group)
             db->SetSegmentChecksum(segment->name, segment->basename, checksum,
                                    segment->size);
         }
+
+        struct stat stat_buf;
+        if (stat(segment->rf->get_local_path().c_str(), &stat_buf) == 0) {
+            group_sizes[segment->group].second += stat_buf.st_size;
+        }
     }
 
     segment->rf->send();