diff options
| author | NeilBrown <neilb@suse.de> | 2009-03-31 14:56:41 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-03-31 14:56:41 +1100 |
| commit | b3546035277847028df650b147469fc943cf5c71 (patch) | |
| tree | 87966abc5456a62845326eb8d5a5cf0f88879b2d /drivers/md/md.c | |
| parent | d562b0c4313e3ddea402a400371afa47ddf679f9 (diff) | |
md/raid5: allow layout/chunksize to be changed on an active 2-drive raid5.
2-drive raid5's aren't very interesting. But if you are converting
a raid1 into a raid5, you will at least temporarily have one. And
that it a good time to set the layout/chunksize for the new RAID5
if you aren't happy with the defaults.
layout and chunksize don't actually affect the placement of data
on a 2-drive raid5, so we just do some internal book-keeping.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 05b613b5e4b..0689d89d263 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2771,12 +2771,18 @@ layout_store(mddev_t *mddev, const char *buf, size_t len) if (!*buf || (*e && *e != '\n')) return -EINVAL; - if (mddev->pers) - return -EBUSY; - - mddev->new_layout = n; - if (mddev->reshape_position == MaxSector) - mddev->layout = n; + if (mddev->pers) { + int err; + if (mddev->pers->reconfig == NULL) + return -EBUSY; + err = mddev->pers->reconfig(mddev, n, -1); + if (err) + return err; + } else { + mddev->new_layout = n; + if (mddev->reshape_position == MaxSector) + mddev->layout = n; + } return len; } static struct md_sysfs_entry md_layout = @@ -2833,19 +2839,24 @@ chunk_size_show(mddev_t *mddev, char *page) static ssize_t chunk_size_store(mddev_t *mddev, const char *buf, size_t len) { - /* can only set chunk_size if array is not yet active */ char *e; unsigned long n = simple_strtoul(buf, &e, 10); if (!*buf || (*e && *e != '\n')) return -EINVAL; - if (mddev->pers) - return -EBUSY; - - mddev->new_chunk = n; - if (mddev->reshape_position == MaxSector) - mddev->chunk_size = n; + if (mddev->pers) { + int err; + if (mddev->pers->reconfig == NULL) + return -EBUSY; + err = mddev->pers->reconfig(mddev, -1, n); + if (err) + return err; + } else { + mddev->new_chunk = n; + if (mddev->reshape_position == MaxSector) + mddev->chunk_size = n; + } return len; } static struct md_sysfs_entry md_chunk_size = |