X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=daemon%2Fparted.c;h=b9b138e3d02acd417882ca977ebff3611cfb7f89;hb=b43482964a8c7e19f47943506872cd58601c28e9;hp=2f928b05b5e50c7d4bce90d4a593b54c5f4028bd;hpb=cbb026036826f2ab40237aec0b0c5453b859625d;p=libguestfs.git

diff --git a/daemon/parted.c b/daemon/parted.c
index 2f928b0..b9b138e 100644
--- a/daemon/parted.c
+++ b/daemon/parted.c
@@ -1,5 +1,5 @@
 /* libguestfs - the guestfsd daemon
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009-2011 Red Hat Inc.
  *
  * 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
@@ -178,27 +178,21 @@ do_part_del (const char *device, int partnum)
 int
 do_part_disk (const char *device, const char *parttype)
 {
-  const char *startstr;
-  const char *endstr;
-
   parttype = check_parttype (parttype);
   if (!parttype) {
     reply_with_error ("unknown partition type: common choices are \"gpt\" and \"msdos\"");
     return -1;
   }
 
-  /* Voooooodooooooooo (thanks Jim Meyering for working this out). */
-  if (STREQ (parttype, "msdos")) {
-    startstr = "1s";
-    endstr = "-1s";
-  } else if (STREQ (parttype, "gpt")) {
-    startstr = "34s";
-    endstr = "-34s";
-  } else {
-    /* untested */
-    startstr = "1s";
-    endstr = "-1s";
-  }
+  /* Align all partitions created this way to 64 sectors, and leave
+   * the last 64 sectors at the end of the disk free.  This wastes
+   * 32K+32K = 64K on 512-byte sector disks.  The rationale is:
+   *
+   * - aligned operations are faster
+   * - GPT requires at least 34 sectors at the end of the disk.
+   */
+  const char *startstr = "64s";
+  const char *endstr = "-64s";
 
   RUN_PARTED (return -1,
               device,
@@ -293,9 +287,6 @@ test_parted_m_opt (void)
   if (result >= 0)
     return result;
 
-  if (verbose)
-    fprintf (stderr, "Testing if this parted supports '-m' option.\n");
-
   char *err = NULL;
   int r = commandr (NULL, &err, "parted", "-s", "-m", "/dev/null", NULL);
   if (r == -1) {
@@ -334,9 +325,6 @@ print_partition_table (const char *device, int parted_has_m_opt)
   }
   free (err);
 
-  if (verbose)
-    fprintf (stderr, "parted output:\n%s<END>\n", out);
-
   return out;
 }
 
@@ -384,6 +372,14 @@ do_part_get_parttype (const char *device)
     }
 
     free_strings (lines);
+
+    /* If "loop" return an error (RHBZ#634246). */
+    if (STREQ (r, "loop")) {
+      free (r);
+      reply_with_error ("not a partitioned device");
+      return NULL;
+    }
+
     return r;
   }
   else {
@@ -412,6 +408,13 @@ do_part_get_parttype (const char *device)
       return NULL;
     }
 
+    /* If "loop" return an error (RHBZ#634246). */
+    if (STREQ (p, "loop")) {
+      free (p);
+      reply_with_error ("not a partitioned device");
+      return NULL;
+    }
+
     return p;                   /* caller frees */
   }
 }