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From e918a1b5a94f270186dca59156354acd2a596494 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Tue, 3 Jun 2014 16:49:38 +0200
Subject: [PATCH] udev: exclude device-mapper from block device ownership event
locking
---
src/udev/udevd.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index 819ea3b..6c05104 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -290,7 +290,19 @@ static void worker_new(struct event *event)
* acquired the lock, the external process will block until
* udev has finished its event handling.
*/
- if (streq_ptr("block", udev_device_get_subsystem(dev))) {
+
+ /*
+ * <kabi_> since we make check - device seems unused - we try
+ * ioctl to deactivate - and device is found to be opened
+ * <kay> sure, you try to take a write lock
+ * <kay> if you get it udev is out
+ * <kay> if you can't get it, udev is busy
+ * <kabi_> we cannot deactivate openned device (as it is in-use)
+ * <kay> maybe we should just exclude dm from that thing entirely
+ * <kabi_> IMHO this sounds like a good plan for this moment
+ */
+ if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
+ !startswith("dm-", udev_device_get_sysname(dev))) {
struct udev_device *d = dev;
if (streq_ptr("partition", udev_device_get_devtype(d)))
--
2.0.0
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