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md-cluster: change array_sectors and update size are not supported
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 <neilb@suse.com> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
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@ -316,3 +316,9 @@ The algorithm is:
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nodes are using the raid which is achieved by lock all bitmap
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locks within the cluster, and also those locks are unlocked
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accordingly.
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7. Unsupported features
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There are somethings which are not supported by cluster MD yet.
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- update size and change array_sectors.
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@ -4817,6 +4817,10 @@ array_size_store(struct mddev *mddev, const char *buf, size_t len)
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if (err)
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return err;
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/* cluster raid doesn't support change array_sectors */
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if (mddev_is_clustered(mddev))
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return -EINVAL;
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if (strncmp(buf, "default", 7) == 0) {
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if (mddev->pers)
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sectors = mddev->pers->size(mddev, 0, 0);
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@ -6438,6 +6442,10 @@ static int update_size(struct mddev *mddev, sector_t num_sectors)
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int rv;
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int fit = (num_sectors == 0);
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/* cluster raid doesn't support update size */
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if (mddev_is_clustered(mddev))
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return -EINVAL;
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if (mddev->pers->resize == NULL)
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return -EINVAL;
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/* The "num_sectors" is the number of sectors of each device that
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