mdadm allows to create second volume on the same disk set, whose size is
less then the free space left in the container (with IMSM_NO_PLATFORM
undefined or set to 0). This is an OROM compatibility issue.
It is fixed by verifying whether IMSM_NO_PLATFORM is set and for
the second volume creation scenario, requested size is verified against
remaining available space.
Signed-off-by: Lukasz Orlowski <lukasz.orlowski@xxxxxxxxx>
---
super-intel.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/super-intel.c b/super-intel.c
index 215679d..4ebee78 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -5276,6 +5276,15 @@ static int validate_geometry_imsm_volume(struct supertype *st, int level,
i += dl->extent_cnt;
maxsize = merge_extents(super, i);
+
+ if (!check_env("IMSM_NO_PLATFORM") &&
+ mpb->num_raid_devs > 0 && size && size != maxsize) {
+ fprintf(stderr, Name ": attempting to create a second "
+ "volume with size less then remaining space. "
+ "Aborting...\n");
+ return 0;
+ }
+
if (maxsize < size || maxsize == 0) {
if (verbose)
fprintf(stderr, Name ": not enough space after merge (%llu < %llu)\n",
---------------------------------------------------------------------
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