38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
|
From 66f69e766e576692ea32328c1921acbacb69ed14 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Zdenek Kabelac <zkabelac@redhat.com>
|
||
|
|
Date: Sat, 14 Sep 2019 01:08:14 +0200
|
||
|
|
Subject: [PATCH] thin: activate layer pool aas read-only LV
|
||
|
|
|
||
|
|
When lvm2 is activating layered pool LV (to basically keep pool opened,
|
||
|
|
the other function used to be 'locking' be in sync with DM table)
|
||
|
|
use this LV in read-only mode - this prevents 'write' access into
|
||
|
|
data volume content of thin-pool.
|
||
|
|
|
||
|
|
Note: since EMPTY/unused thin-pool is created as 'public LV' for generic
|
||
|
|
use by any user who i.e. wish to maintain thin-pool and thins himself.
|
||
|
|
At this moment, thin-pool appears as writable LV. As soon as the 1st.
|
||
|
|
thinLV is created, layer volume will appear is 'read-only' LV from this moment.
|
||
|
|
---
|
||
|
|
lib/activate/dev_manager.c | 5 +++++
|
||
|
|
1 files changed, 5 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/lib/activate/dev_manager.c b/lib/activate/dev_manager.c
|
||
|
|
index c780deaa02..32fdcb94f7 100644
|
||
|
|
--- a/lib/activate/dev_manager.c
|
||
|
|
+++ b/lib/activate/dev_manager.c
|
||
|
|
@@ -85,6 +85,11 @@ int read_only_lv(const struct logical_volume *lv, const struct lv_activate_opts
|
||
|
|
if (lv_is_raid_image(lv) || lv_is_raid_metadata(lv))
|
||
|
|
return 0; /* Keep RAID SubLvs writable */
|
||
|
|
|
||
|
|
+ if (!layer) {
|
||
|
|
+ if (lv_is_thin_pool(lv))
|
||
|
|
+ return 1;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
return (laopts->read_only || !(lv->status & LVM_WRITE));
|
||
|
|
}
|
||
|
|
|
||
|
|
--
|
||
|
|
2.24.0
|
||
|
|
|