[PATCH 06/13] md-cluster: change array_sectors and update size are not supported
From: Guoqing Jiang <hidden>
Date: 2016-04-21 05:58:07
Subsystem:
documentation, software raid (multiple disks) support, the rest · Maintainers:
Jonathan Corbet, Song Liu, Yu Kuai, Linus Torvalds
Currently, some features are not supported yet, such as change array_sectors and update size, so return EINVAL for them and listed it in document. Reviewed-by: NeilBrown <redacted> Signed-off-by: Guoqing Jiang <redacted> --- Documentation/md-cluster.txt | 6 ++++++ drivers/md/md.c | 8 ++++++++ 2 files changed, 14 insertions(+)
diff --git a/Documentation/md-cluster.txt b/Documentation/md-cluster.txt
index c100c71..3888327 100644
--- a/Documentation/md-cluster.txt
+++ b/Documentation/md-cluster.txt@@ -316,3 +316,9 @@ The algorithm is: nodes are using the raid which is achieved by lock all bitmap locks within the cluster, and also those locks are unlocked accordingly. + +7. Unsupported features + +There are somethings which are not supported by cluster MD yet. + +- update size and change array_sectors.
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0639c01..1b26397 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c@@ -4812,6 +4812,10 @@ array_size_store(struct mddev *mddev, const char *buf, size_t len) if (err) return err; + /* cluster raid doesn't support change array_sectors */ + if (mddev_is_clustered(mddev)) + return -EINVAL; + if (strncmp(buf, "default", 7) == 0) { if (mddev->pers) sectors = mddev->pers->size(mddev, 0, 0);
@@ -6433,6 +6437,10 @@ static int update_size(struct mddev *mddev, sector_t num_sectors) int rv; int fit = (num_sectors == 0); + /* cluster raid doesn't support update size */ + if (mddev_is_clustered(mddev)) + return -EINVAL; + if (mddev->pers->resize == NULL) return -EINVAL; /* The "num_sectors" is the number of sectors of each device that
--
2.6.6