[linux-lvm] [PATCH] lvdisplay: dispaly partial when underlying devs missing

[Zhao Heming <heming.zhao@suse.com>]

After removing LV underlying dev, lvdisplay still display 'available'.

With this patch, lvdisplay will show
from:
  LV Status              available
to:
  LV Status              NOT available (partial)

reproducible steps:
1. vgcreate vg1 /dev/sda /dev/sdb
2. lvcreate --type raid0 -l 100%FREE -n raid0lv vg1
3. do remove the /dev/sdb action
4. lvdisplay show wrong 'LV Status'

Signed-off-by: Zhao Heming <heming.zhao@suse.com>
---
 lib/display/display.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/display/display.c b/lib/display/display.c
index 36c9879b3..6c895c820 100644
--- a/lib/display/display.c
+++ b/lib/display/display.c
@@ -399,7 +399,7 @@ int lvdisplay_full(struct cmd_context *cmd,
 		   void *handle __attribute__((unused)))
 {
 	struct lvinfo info;
-	int inkernel, snap_active = 0;
+	int inkernel, snap_active = 0, partial = 0;
 	char uuid[64] __attribute__((aligned(8)));
 	const char *access_str;
 	struct lv_segment *snap_seg = NULL, *mirror_seg = NULL;
@@ -555,9 +555,13 @@ int lvdisplay_full(struct cmd_context *cmd,
 
 	if (inkernel && info.suspended)
 		log_print("LV Status              suspended");
-	else if (activation())
-		log_print("LV Status              %savailable",
-			  inkernel ? "" : "NOT ");
+	else if (activation()) {
+		if (lv->status & PARTIAL_LV)
+			partial = 1;
+		log_print("LV Status              %savailable %s",
+			  (inkernel && !partial) ? "" : "NOT ",
+			  partial ? "(partial)" : "");
+	}
 
 /********* FIXME lv_number
     log_print("LV #                   %u", lv->lv_number + 1);
-- 
2.27.0