When level is changed from raid0 to raid5 memory is required for replace device
smaller device/array object. When update points to no spare device
(u->new_disks[0] == -1) memory for new missed disk will be required also.
This memory is allocated in manager context in prepare_update()
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
super-intel.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/super-intel.c b/super-intel.c
index fbc71ab..223019a 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -6536,6 +6536,55 @@ static void imsm_prepare_update(struct supertype *st,
break;
}
case update_reshape_migration: {
+ /* for migration level 0->5 we need to add disks
+ * so the same as for container operation we will copy
+ * device to the bigger location.
+ * in memory prepared device and new disk area are prepared
+ * for usage in process update
+ */
+ struct imsm_update_reshape *u = (void *)update->buf;
+ struct intel_dev *id;
+ void **space_tail = (void **)&update->space_list;
+ int size;
+ void *s;
+
+ dprintf("imsm: imsm_prepare_update() for update_reshape\n");
+
+ /* add space for bigger array in update
+ */
+ for (id = super->devlist; id; id = id->next) {
+ if (id->index == (unsigned)u->subdev) {
+ size = sizeof_imsm_dev(id->dev, 1);
+ if (u->new_raid_disks > u->old_raid_disks)
+ size += sizeof(__u32)*2*
+ (u->new_raid_disks - u->old_raid_disks);
+ s = malloc(size);
+ if (!s)
+ break;
+ *space_tail = s;
+ space_tail = s;
+ *space_tail = NULL;
+ break;
+ }
+ }
+ if (update->space_list == NULL)
+ break;
+
+ /* add space for disk in update
+ */
+ size = sizeof(struct dl);
+ s = malloc(size);
+ if (!s) {
+ free(update->space_list);
+ update->space_list = NULL;
+ break;
+ }
+ *space_tail = s;
+ space_tail = s;
+ *space_tail = NULL;
+
+ len = disks_to_mpb_size(u->new_raid_disks);
+ dprintf("New anchor length is %llu\n", (unsigned long long)len);
break;
}
case update_create_array: {
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
