[dm-devel] [PATCH 4/4] libmultipath: uev_update_path: update path properties

[Martin Wilck]

Update pp->udev and those path attributes that can be cheaply
updated from sysfs, i.e. without IO to the disk.

Signed-off-by: Martin Wilck <mwilck at suse.com>
---
 multipathd/main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/multipathd/main.c b/multipathd/main.c
index f7b9676ddb28..90f0b29ade70 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -964,6 +964,14 @@ uev_update_path (struct uevent *uev, struct vectors * vecs)
 				strcpy(pp->wwid, wwid);
 			else
 				pp->wwid_changed = 0;
+		} else {
+			udev_device_unref(pp->udev);
+			pp->udev = udev_device_ref(uev->udev);
+			conf = get_multipath_config();
+			if (pathinfo(pp, conf, DI_SYSFS|DI_NOIO) != PATHINFO_OK)
+				condlog(1, "%s: pathinfo failed after change uevent",
+					uev->kernel);
+			put_multipath_config(conf);
 		}
 
 		if (pp->initialized == INIT_REQUESTED_UDEV)
-- 
2.16.1