54 lines
2.8 KiB
Diff
54 lines
2.8 KiB
Diff
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From 2e5b17d01347d3c3118be2b8ad63d20415dbb1f0 Mon Sep 17 00:00:00 2001
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From: Kay Sievers <kay@vrfy.org>
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Date: Thu, 24 Jul 2014 23:37:35 +0200
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Subject: [PATCH] udev: exclude MD from block device ownership event locking
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MD instantiates devices at open(). This is incomptible with the
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locking logic, as the "change" event emitted when stopping a
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device will bring it back.
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---
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src/udev/udevd.c | 23 +++++++----------------
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1 file changed, 7 insertions(+), 16 deletions(-)
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diff --git src/udev/udevd.c src/udev/udevd.c
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index a45d324..db935d6 100644
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--- src/udev/udevd.c
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+++ src/udev/udevd.c
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@@ -285,26 +285,17 @@ static void worker_new(struct event *event)
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udev_event->exec_delay = exec_delay;
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/*
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- * Take a "read lock" on the device node; this establishes
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+ * Take a shared lock on the device node; this establishes
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* a concept of device "ownership" to serialize device
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- * access. External processes holding a "write lock" will
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+ * access. External processes holding an exclusive lock will
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* cause udev to skip the event handling; in the case udev
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- * acquired the lock, the external process will block until
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+ * acquired the lock, the external process can block until
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* udev has finished its event handling.
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*/
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-
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- /*
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- * <kabi_> since we make check - device seems unused - we try
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- * ioctl to deactivate - and device is found to be opened
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- * <kay> sure, you try to take a write lock
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- * <kay> if you get it udev is out
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- * <kay> if you can't get it, udev is busy
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- * <kabi_> we cannot deactivate openned device (as it is in-use)
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- * <kay> maybe we should just exclude dm from that thing entirely
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- * <kabi_> IMHO this sounds like a good plan for this moment
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- */
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- if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
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- !startswith(udev_device_get_sysname(dev), "dm-")) {
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+ if (!streq_ptr(udev_device_get_action(dev), "remove") &&
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+ streq_ptr("block", udev_device_get_subsystem(dev)) &&
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+ !startswith(udev_device_get_sysname(dev), "dm-") &&
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+ !startswith(udev_device_get_sysname(dev), "md")) {
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struct udev_device *d = dev;
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if (streq_ptr("partition", udev_device_get_devtype(d)))
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--
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1.7.9.2
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