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writecache: prevent snapshots

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there appear to be problems with taking a snapshot
of an LV with a writecache, so block it until that
is understood or fixed.
This commit is contained in:
David Teigland 2020-02-06 11:27:33 -06:00
parent 2a6078f961
commit ffea7daec3
1 changed files with 4 additions and 1 deletions
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5
lib/metadata/snapshot_manip.c
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@ -385,8 +385,11 @@ int validate_snapshot_origin(const struct logical_volume *origin_lv)
log_warn("WARNING: Consider using the raid1 mirror type to avoid this."); log_warn("WARNING: Consider using the raid1 mirror type to avoid this.");
log_warn("WARNING: See global/mirror_segtype_default in lvm.conf."); log_warn("WARNING: See global/mirror_segtype_default in lvm.conf.");
} }
} else if (lv_is_raid_type(origin_lv) && !lv_is_raid(origin_lv)) } else if (lv_is_raid_type(origin_lv) && !lv_is_raid(origin_lv)) {
err = "raid subvolumes"; err = "raid subvolumes";
} else if (lv_is_writecache(origin_lv)) {
err = "writecache";
}
if (err) { if (err) {
log_error("Snapshots of %s are not supported.", err); log_error("Snapshots of %s are not supported.", err);