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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-10 09:52:59 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-10 09:52:59 +0100 |
| commit | b920eb41a8241c54efbbd4f2ed6d074f497b0d9e (patch) | |
| tree | 5941091817e932add192f8e58dc88d483322e214 /drivers/md/raid0.c | |
| parent | a9d5801041eecc7baceff49a28e82f91f207a961 (diff) | |
| parent | 0034102808e0dbbf3a2394b82b1bb40b5778de9e (diff) | |
| download | lwn-b920eb41a8241c54efbbd4f2ed6d074f497b0d9e.tar.gz lwn-b920eb41a8241c54efbbd4f2ed6d074f497b0d9e.zip | |
Merge tag 'v3.4-rc2' into regulator-drivers
Linux 3.4-rc2 contains some fixes that further patches depend upon.
Diffstat (limited to 'drivers/md/raid0.c')
| -rw-r--r-- | drivers/md/raid0.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 6f31f5596e01..de63a1fc3737 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -407,6 +407,8 @@ static sector_t raid0_size(struct mddev *mddev, sector_t sectors, int raid_disks return array_sectors; } +static int raid0_stop(struct mddev *mddev); + static int raid0_run(struct mddev *mddev) { struct r0conf *conf; @@ -454,7 +456,12 @@ static int raid0_run(struct mddev *mddev) blk_queue_merge_bvec(mddev->queue, raid0_mergeable_bvec); dump_zones(mddev); - return md_integrity_register(mddev); + + ret = md_integrity_register(mddev); + if (ret) + raid0_stop(mddev); + + return ret; } static int raid0_stop(struct mddev *mddev) @@ -625,6 +632,7 @@ static void *raid0_takeover_raid10(struct mddev *mddev) static void *raid0_takeover_raid1(struct mddev *mddev) { struct r0conf *priv_conf; + int chunksect; /* Check layout: * - (N - 1) mirror drives must be already faulty @@ -635,10 +643,25 @@ static void *raid0_takeover_raid1(struct mddev *mddev) return ERR_PTR(-EINVAL); } + /* + * a raid1 doesn't have the notion of chunk size, so + * figure out the largest suitable size we can use. + */ + chunksect = 64 * 2; /* 64K by default */ + + /* The array must be an exact multiple of chunksize */ + while (chunksect && (mddev->array_sectors & (chunksect - 1))) + chunksect >>= 1; + + if ((chunksect << 9) < PAGE_SIZE) + /* array size does not allow a suitable chunk size */ + return ERR_PTR(-EINVAL); + /* Set new parameters */ mddev->new_level = 0; mddev->new_layout = 0; - mddev->new_chunk_sectors = 128; /* by default set chunk size to 64k */ + mddev->new_chunk_sectors = chunksect; + mddev->chunk_sectors = chunksect; mddev->delta_disks = 1 - mddev->raid_disks; mddev->raid_disks = 1; /* make sure it will be not marked as dirty */ |