[PATCH 3 of 6 RESENT] libxl: Allocate memory for strings in libxl_device_disk

[Marek Marczykowski <marmarek@mimuw.edu.pl>]

# HG changeset patch
# User Marek Marczykowski <marmarek@mimuw.edu.pl>
# Date 1306962954 -7200
# Node ID 9fe949c7ab9601bb5500a53c538f7a23b61e1bcb
# Parent  5231fa19f3e39091ff29e2a6dca057ca54403092
libxl: Allocate memory for strings in libxl_device_disk

Memory for strings in libxl_device_disk must be allocated from outside of
libxl__gc to not be freed at the end of function (by libxl__free_all).

Fixes xl block-detach

Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>

diff -r 5231fa19f3e3 -r 9fe949c7ab96 tools/libxl/libxl_utils.c
--- a/tools/libxl/libxl_utils.c	Wed Jun 01 23:15:29 2011 +0200
+++ b/tools/libxl/libxl_utils.c	Wed Jun 01 23:15:54 2011 +0200
@@ -551,10 +551,10 @@ int libxl_devid_to_device_disk(libxl_ctx
         goto out;
     disk->backend_domid = strtoul(val, NULL, 10);
     be_path = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/backend", diskpath));
-    disk->pdev_path = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/params", be_path));
+    disk->pdev_path = xs_read(ctx->xsh, XBT_NULL, libxl__sprintf(&gc, "%s/params", be_path), NULL);
     val = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/type", be_path));
     libxl_string_to_backend(ctx, val, &(disk->backend));
-    disk->vdev = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/dev", be_path));
+    disk->vdev = xs_read(ctx->xsh, XBT_NULL, libxl__sprintf(&gc, "%s/dev", be_path), NULL);
     val = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/removable", be_path));
     disk->unpluggable = !strcmp(val, "1");
     val = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/mode", be_path));