diff options
| author | Trela Maciej <Maciej.Trela@intel.com> | 2010-03-08 16:02:42 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2010-05-18 15:27:47 +1000 |
| commit | 54071b3808ee3dc8624d9d6f1b06c4fd5308fa3b (patch) | |
| tree | b254ce6625ce3dd472faac0d59edeb9589b30f2b | |
| parent | 84707f38e767ac470fd82af6c45a8cafe2bd1b9a (diff) | |
| download | linux-54071b3808ee3dc8624d9d6f1b06c4fd5308fa3b.tar.bz2 | |
md:Add support for Raid0->Raid5 takeover
Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/md.c | 14 | ||||
| -rw-r--r-- | drivers/md/raid5.c | 26 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 2a64cba9ea72..22c630b7ba6c 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3017,6 +3017,20 @@ level_store(mddev_t *mddev, const char *buf, size_t len) mddev->to_remove = &md_redundancy_group; } + if (mddev->pers->sync_request == NULL && + mddev->external) { + /* We are converting from a no-redundancy array + * to a redundancy array and metadata is managed + * externally so we need to be sure that writes + * won't block due to a need to transition + * clean->dirty + * until external management is started. + */ + mddev->in_sync = 0; + mddev->safemode_delay = 0; + mddev->safemode = 0; + } + module_put(mddev->pers->owner); /* Invalidate devices that are now superfluous */ list_for_each_entry(rdev, &mddev->disks, same_set) 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); |