Patch adds ability to function imsm_analyze_change() for:
1. Detect size change request for volume operation.
2. Check and correct size for change.
3. Set new change kind to CH_ARRAY_SIZE
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
super-intel.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/super-intel.c b/super-intel.c
index 3aabcc0..b657249 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -405,6 +405,7 @@ struct extent {
enum imsm_reshape_type {
CH_TAKEOVER,
CH_MIGRATION,
+ CH_ARRAY_SIZE,
};
/* definition of messages passed to imsm_process_update */
@@ -9728,6 +9729,10 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
int devNumChange = 0;
/* imsm compatible layout value for array geometry verification */
int imsm_layout = -1;
+ int data_disks;
+ struct imsm_dev *dev;
+ struct intel_super *super;
+ long long current_size;
getinfo_super_imsm_volume(st, &info, NULL);
if ((geo->level != info.array.level) &&
@@ -9809,6 +9814,47 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
geo->chunksize = info.array.chunk_size;
chunk = geo->chunksize / 1024;
+
+ super = st->sb;
+ dev = get_imsm_dev(super, super->current_vol);
+ data_disks = imsm_num_data_members(dev , MAP_0);
+ /* compute current size in K per disk member
+ */
+ current_size = info.custom_array_size / 2 / data_disks;
+
+ if ((current_size != geo->size) && (geo->size > 0)) {
+ if (change != -1) {
+ fprintf(stderr,
+ Name " Error. Size change should be the only "
+ "one at a time.\n");
+ change = -1;
+ goto analyse_change_exit;
+ }
+ if ((super->current_vol + 1) != super->anchor->num_raid_devs) {
+ fprintf(stderr,
+ Name " Error. The last volume in container "
+ "can be expanded only (%i/%i).\n",
+ super->current_vol, st->devnum);
+ goto analyse_change_exit;
+ }
+ geo->size *= 2;
+ /* round size due to metadata compatibility
+ */
+ geo->size = (geo->size >> SECT_PER_MB_SHIFT)
+ << SECT_PER_MB_SHIFT;
+ dprintf("Prepare update for size change to %llu\n", geo->size );
+ if (current_size >= geo->size) {
+ fprintf(stderr,
+ Name " Error. Size expanssion is supported only"
+ " (current size is %llu, requested size "
+ "/rounded/ is %llu).\n",
+ current_size, geo->size);
+ goto analyse_change_exit;
+ }
+ geo->size *= data_disks;
+ geo->raid_disks = dev->vol.map->num_members;
+ change = CH_ARRAY_SIZE;
+ }
if (!validate_geometry_imsm(st,
geo->level,
imsm_layout,
@@ -9978,6 +10024,11 @@ static int imsm_reshape_super(struct supertype *st, long long size, int level,
free(u);
}
break;
+ case CH_ARRAY_SIZE: {
+ /* ToDo: Prepare metadata update here
+ */
+ }
+ break;
default:
ret_val = 1;
}
--
1.6.4.2
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