From 1e421afa988195bead6650c421d9752fed32b73f Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 31 Aug 2013 22:48:04 +0100
Subject: [PATCH] rescue: Use cachemode "unsafe" for the virt-rescue --scratch
 option.

(cherry picked from commit 3f0748f1fc64e42517c0d4535c27b1f32da86023)
---
 fish/options.c       | 5 +++++
 fish/options.h       | 1 +
 rescue/virt-rescue.c | 1 +
 3 files changed, 7 insertions(+)

diff --git a/fish/options.c b/fish/options.c
index 6d63afa..75d61ad 100644
--- a/fish/options.c
+++ b/fish/options.c
@@ -110,6 +110,10 @@ add_drives (struct drv *drv, char next_drive)
         ad_optargs.bitmask |= GUESTFS_ADD_DRIVE_OPTS_FORMAT_BITMASK;
         ad_optargs.format = drv->a.format;
       }
+      if (drv->a.cachemode) {
+        ad_optargs.bitmask |= GUESTFS_ADD_DRIVE_OPTS_CACHEMODE_BITMASK;
+        ad_optargs.cachemode = drv->a.cachemode;
+      }
 
       r = guestfs_add_drive_opts_argv (g, drv->a.filename, &ad_optargs);
       if (r == -1)
@@ -254,6 +258,7 @@ free_drives (struct drv *drv)
   case drv_a:
     free (drv->a.filename);
     /* a.format is an optarg, so don't free it */
+    /* a.cachemode is a static string, so don't free it */
     break;
   case drv_uri:
     free (drv->uri.path);
diff --git a/fish/options.h b/fish/options.h
index 507ec1c..e2192b5 100644
--- a/fish/options.h
+++ b/fish/options.h
@@ -60,6 +60,7 @@ struct drv {
     struct {
       char *filename;       /* disk filename */
       const char *format;   /* format (NULL == autodetect) */
+      const char *cachemode;/* cachemode (NULL == default) */
     } a;
     struct {
       char *path;           /* disk path */
diff --git a/rescue/virt-rescue.c b/rescue/virt-rescue.c
index 65dd473..942c54a 100644
--- a/rescue/virt-rescue.c
+++ b/rescue/virt-rescue.c
@@ -580,6 +580,7 @@ add_scratch_disk (struct drv **drvs)
     exit (EXIT_FAILURE);
   }
   drv->a.format = "raw";
+  drv->a.cachemode = "unsafe"; /* because it's a scratch disk */
   drv->next = *drvs;
   *drvs = drv;
 }
-- 
1.8.3.1