Libguestfs - May 2022 - [PATCH v2v 2/2] convert: Remove /dev/mapper/osprober-* devices left around by grub2

Still testing this one as well ...

Rich.

We were invoking grub2-mkconfig in the same way in two different
places.  This just refactors one of the calls so it uses the #update
method.  It should make no difference.
---
 convert/linux_bootloaders.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/convert/linux_bootloaders.ml b/convert/linux_bootloaders.ml
index 0bde2c0d73..a70b65a41c 100644
--- a/convert/linux_bootloaders.ml
+++ b/convert/linux_bootloaders.ml
@@ -333,7 +333,7 @@ object (self)
         g#aug_save ();
 
         try
-          ignore (g#command [| grub2_mkconfig_cmd; "-o"; grub_config
|])
+          self#update ()
         with
           G.Error msg ->
             warning (f_"could not rebuild grub2 configuration file (%s). 
This may mean that grub output will not be sent to the serial port, but
otherwise should be harmless.  Original error message: %s")
-- 
2.35.1

These devices can be left around by grub2 when it runs the osprober
tool after we run ?/sbin/grub2-mkconfig -o /boot/grub2/grub.cfg?.
They are read-only mirrors of existing filesystems.  These confuse
later steps in conversion, specifically fstrim.

Reported-by: Ming Xie
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2003503
---
 convert/linux_bootloaders.ml | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/convert/linux_bootloaders.ml b/convert/linux_bootloaders.ml
index a70b65a41c..7c5fb0be3f 100644
--- a/convert/linux_bootloaders.ml
+++ b/convert/linux_bootloaders.ml
@@ -345,7 +345,14 @@ object (self)
   method remove_console = self#grub2_update_console ~remove:true
 
   method update () -    ignore (g#command [| grub2_mkconfig_cmd;
"-o"; grub_config |])
+    ignore (g#command [| grub2_mkconfig_cmd; "-o"; grub_config |]);
+
+    (* Grub2 runs osprober which sometimes leaves around read-only
+     * device-mapper maps covering existing filesystems.  These
+     * confuse later steps (especially fstrim).  So just delete
+     * any if found. (RHBZ#2003503).
+     *)
+    ignore (g#command [| "bash"; "-c"; "rm -f
/dev/mapper/osprober-*" |])
 
   method get_config_file ()      grub_config
-- 
2.35.1

On Tue, May 17, 2022 at 11:59:26AM +0100, Richard W.M. Jones
wrote:
> Still testing this one as well ...
The version (with rm) fixes the bug for me.

Rich.

-- 
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