diff options
| author | Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com> | 2011-05-04 17:12:14 +0200 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-05-09 11:45:53 +1000 |
| commit | bc0b9d34968b5f681ab91ddbc27dbe5995aaa695 (patch) | |
| tree | 2de7abdd6dc50c99b31058aff4193264c12fc449 /super-intel.c | |
| parent | c7958710e7ddd33914614cb73f52fd3e166e2877 (diff) | |
imsm: prepare memory for level migration update
When level is changed from raid0 to raid5 memory is required for replace device
smaller device/array object.
This memory is allocated in manager context in prepare_update()
Prepare_update() is called in manager context so memory allocation are
allowed here. This allows us to look for spare devices for meta update.
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'super-intel.c')
| -rw-r--r-- | super-intel.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/super-intel.c b/super-intel.c index 71687f1c..8ee37102 100644 --- a/super-intel.c +++ b/super-intel.c @@ -6652,6 +6652,8 @@ static void imsm_process_update(struct supertype *st, } } +static struct mdinfo *get_spares_for_grow(struct supertype *st); + static void imsm_prepare_update(struct supertype *st, struct metadata_update *update) { @@ -6750,6 +6752,90 @@ 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_migration *u = (void *)update->buf; + struct intel_dev *id; + void **space_tail = (void **)&update->space_list; + int size; + void *s; + int current_level = -1; + + 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; + + /* add spare device to update + */ + for (id = super->devlist ; id; id = id->next) + if (id->index == (unsigned)u->subdev) { + struct imsm_dev *dev; + struct imsm_map *map; + + dev = get_imsm_dev(super, u->subdev); + map = get_imsm_map(dev, 0); + current_level = map->raid_level; + break; + } + if ((u->new_level == 5) && (u->new_level != current_level)) { + struct mdinfo *spares; + + spares = get_spares_for_grow(st); + if (spares) { + struct dl *dl; + struct mdinfo *dev; + + dev = spares->devs; + if (dev) { + u->new_disks[0] = + makedev(dev->disk.major, + dev->disk.minor); + dl = get_disk_super(super, + dev->disk.major, + dev->disk.minor); + dl->index = u->old_raid_disks; + dev = dev->next; + } + sysfs_free(spares); + } + } + 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: { |