[parted-devel] [PATCH 4/6] libparted: set dmraid partition uuid

[Phillip Susi]

When dmraid creates the partition devices, it assigns them a UUID in the
form of "DMRAID-XXXXX".  When kpartx creates the partitions, it assigns
them a UUID of the form "partN-DMRAID-XXXX".  This patch has parted use
the kpartx style.
---
 NEWS                   |   10 ++++++++++
 libparted/arch/linux.c |    8 ++++++++
 2 files changed, 18 insertions(+)

diff --git a/NEWS b/NEWS
index d8fefc8..ea3b302 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,7 @@ GNU parted NEWS                                    -*- outline -*-
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
 ** Bug Fixes
+
   libparted: Don't fail to manipulate partitions on dmraid disks that
   have other partitions in use.
 
@@ -21,6 +22,12 @@ GNU parted NEWS                                    -*- outline -*-
 
 ** Changes in behavior
 
+  libparted: set dmraid partition uuid.  When dmraid creates the
+  partition devices, it assigns them a UUID in the form of
+  "DMRAID-XXXXX".  When kpartx creates the partitions, it assigns
+  them a UUID of the form "partN-DMRAID-XXXX".  Parted will now
+  set the UUID and use the kpartx style.
+
   Device-mapper devices other than dmraid whole disks will no longer be
   shown by parted -l.
 
@@ -64,6 +71,9 @@ GNU parted NEWS                                    -*- outline -*-
 
 ** Bug fixes
 
+  libparted: Don't fail to manipulate partitions on dmraid disks that
+  have other partitions in use.
+
   libparted: avoid an invalid free when creating many partitions in
   a GPT partition table.  [bug introduced in parted-1.9.0]
 
diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c
index 5e5b527..5eb66ac 100644
--- a/libparted/arch/linux.c
+++ b/libparted/arch/linux.c
@@ -2743,6 +2743,14 @@ _dm_add_partition (PedDisk* disk, const PedPartition* part)
         dm_task_set_name (task, vol_name);
         dm_task_add_target (task, 0, part->geom.length,
                 "linear", params);
+        char *dm_uuid;
+        int uuid_len;
+        if (_is_dmraid_device (disk->dev->path)) {
+                uuid_len = (strlen (vol_name) + 8);
+                dm_uuid = (char*) ped_malloc (uuid_len);
+                snprintf (dm_uuid, uuid_len, "part%d-DMRAID-%s", part->num, vol_name);
+                dm_task_set_uuid (task, dm_uuid);
+        }
         if (dm_task_run (task)) {
                 dm_task_update_nodes();
                 dm_task_destroy(task);
-- 
1.7.10.4