[lvm-devel] stable-2.02 - lvdisplay: fix show of merged thin snapshot

[Zdenek Kabelac]

Gitweb:        https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=7243e32ce56c2f33fb7cfd735dc6abf27f868c00
Commit:        7243e32ce56c2f33fb7cfd735dc6abf27f868c00
Parent:        9344a04b3794b154b06fa44da62d088f0b057486
Author:        Zdenek Kabelac <zkabelac at redhat.com>
AuthorDate:    Fri Feb 12 15:11:48 2021 +0100
Committer:     Zdenek Kabelac <zkabelac at redhat.com>
CommitterDate: Wed Feb 17 11:56:12 2021 +0100

lvdisplay: fix show of merged thin snapshot

When lvdisplay was executed and thin snaphost has be merged to
thin origin and the operation has been postponed till devices
are closed, command crashed.

Check LV is COW before trying to check snapshot percentage.
---
 lib/display/display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/display/display.c b/lib/display/display.c
index cd911feea..f6a212c7b 100644
--- a/lib/display/display.c
+++ b/lib/display/display.c
@@ -474,7 +474,7 @@ int lvdisplay_full(struct cmd_context *cmd,
 					  snap_active ? "active" : "INACTIVE");
 		}
 		snap_seg = NULL;
-	} else if ((snap_seg = find_snapshot(lv))) {
+	} else if (lv_is_cow(lv) && (snap_seg = find_snapshot(lv))) {
 		if (inkernel &&
 		    (snap_active = lv_snapshot_percent(snap_seg->cow,
 						       &snap_percent)))