Description of the bug:
Interrupted reshape cannot be continued using incremental assembly.
Array becomes inactive.
Cause of the bug:
Reshape tried to continue with insufficient number of disks
added by incremental assembly (tested using capacity expansion).
Solution:
During reshape adding disks to array should be blocked until
minimum required number of disks is ready to be added.
Signed-off-by: Lukasz Dorau <lukasz.dorau@xxxxxxxxx>
---
Assemble.c | 39 +++++++++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/Assemble.c b/Assemble.c
index 25cfec1..da43162 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1531,6 +1531,45 @@ int assemble_container_content(struct supertype *st, int mdfd,
if (sra)
sysfs_free(sra);
+ if (content->reshape_active) {
+ int disks_counter = 0;
+ int required_disks;
+ required_disks = content->array.raid_disks;
+ /* check if disks are removed */
+ if (content->delta_disks < 0)
+ required_disks += content->delta_disks;
+ /* Count devices available for assemblation.
+ * In case of incremental assemblation during reshape
+ * allow to add disks only if required minimum number of disks
+ * is already collected to avoid assemblation problem.
+ * */
+ for (dev = content->devs; dev; dev = dev->next) {
+ if (dev->disk.raid_disk >= 0)
+ disks_counter++;
+ }
+ /* allow for degradation */
+ switch (content->array.level) {
+ case 6:
+ required_disks--;
+ case 4:
+ case 5:
+ required_disks--;
+ default:
+ break;
+ }
+ /* check now, if number of disks allows for assemblation
+ * */
+ if (disks_counter < required_disks) {
+ if (verbose >= 0)
+ fprintf(stderr, Name
+ ": %s not assembled with %d devices "
+ "(required disks for assemblation: %i).\n",
+ chosen_name, disks_counter,
+ required_disks);
+ return 1;
+ }
+ block_subarray(content);
+ }
old_raid_disks = content->array.raid_disks - content->delta_disks;
for (dev = content->devs; dev; dev = dev->next)
if (sysfs_add_disk(content, dev, 1) == 0) {
---------------------------------------------------------------------
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z siedziba w Gdansku
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