[dm-devel] [PATCH] multipath: don't remove dm device on remove uevent

[Benjamin Marzinski <bmarzins redhat com>]

multipathd gets remove uevents for dm devices when the devices have
been removed.  It shouldn't try to actually remove the device itself,
since that has already been done, or it wouldn't have gotten the uevent.

Signed-off-by: Benjamin Marzinski <bmarzins redhat com>
---
 multipathd/main.c |   22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

Index: multipath-tools-111219/multipathd/main.c
===================================================================
--- multipath-tools-111219.orig/multipathd/main.c
+++ multipath-tools-111219/multipathd/main.c
@@ -310,7 +310,8 @@ static int
 uev_remove_map (struct uevent * uev, struct vectors * vecs)
 {
 	char *alias;
-	int minor, rc;
+	int minor;
+	struct multipath *mpp;
 
 	condlog(2, "%s: remove map (uevent)", uev->kernel);
 	alias = uevent_get_dm_name(uev);
@@ -319,9 +320,24 @@ uev_remove_map (struct uevent * uev, str
 		return 0;
 	}
 	minor = uevent_get_minor(uev);
-	rc = ev_remove_map(uev->kernel, alias, minor, vecs);
+	mpp = find_mp_by_minor(vecs->mpvec, minor);
+
+	if (!mpp) {
+		condlog(2, "%s: devmap not registered, can't remove",
+			uev->kernel);
+		goto out;
+	}
+	if (strcmp(mpp->alias, alias)) {
+		condlog(2, "%s: minor number mismatch (map %d, event %d)",
+			mpp->alias, mpp->dmi->minor, minor);
+		goto out;
+	}
+
+	orphan_paths(vecs->pathvec, mpp);
+	remove_map_and_stop_waiter(mpp, vecs, 1);
+out:
 	FREE(alias);
-	return rc;
+	return 0;
 }
 
 int