diff options
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 10af3715b1fc..bb28fd6b44fe 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -52,6 +52,7 @@ #include <linux/cpu.h> #include "md.h" #include "raid5.h" +#include "raid0.h" #include "bitmap.h" /* @@ -5619,6 +5620,21 @@ static void raid5_quiesce(mddev_t *mddev, int state) } +static void *raid5_takeover_raid0(mddev_t *mddev) +{ + + mddev->new_level = 5; + mddev->new_layout = ALGORITHM_PARITY_N; + mddev->new_chunk_sectors = mddev->chunk_sectors; + mddev->raid_disks += 1; + mddev->delta_disks = 1; + /* make sure it will be not marked as dirty */ + mddev->recovery_cp = MaxSector; + + return setup_conf(mddev); +} + + static void *raid5_takeover_raid1(mddev_t *mddev) { int chunksect; @@ -5748,6 +5764,16 @@ static void *raid5_takeover(mddev_t *mddev) * raid4 - trivial - just use a raid4 layout. * raid6 - Providing it is a *_6 layout */ + if (mddev->level == 0) { + /* for raid0 takeover only one zone is supported */ + struct raid0_private_data *raid0_priv + = mddev->private; + if (raid0_priv->nr_strip_zones > 1) { + printk(KERN_ERR "md: cannot takeover raid 0 with more than one zone.\n"); + return ERR_PTR(-EINVAL); + } + return raid5_takeover_raid0(mddev); + } if (mddev->level == 1) return raid5_takeover_raid1(mddev); |