diff options
| author | Kay Sievers <kay@vrfy.org> | 2014-07-24 23:37:35 +0200 |
|---|---|---|
| committer | Kay Sievers <kay@vrfy.org> | 2014-07-24 23:37:35 +0200 |
| commit | 2e5b17d01347d3c3118be2b8ad63d20415dbb1f0 (patch) | |
| tree | b5c91f629f5a0a3f27a3451440f6b784c5e0e8ad | |
| parent | fa94c34b083b5b4019975624453e53d0cbad2a5d (diff) | |
udev: exclude MD from block device ownership event locking
MD instantiates devices at open(). This is incomptible with the
locking logic, as the "change" event emitted when stopping a
device will bring it back.
Notes
Backport: bugfix
| -rw-r--r-- | src/udev/udevd.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/src/udev/udevd.c b/src/udev/udevd.c index a45d3240c..db935d609 100644 --- a/src/udev/udevd.c +++ b/src/udev/udevd.c @@ -285,26 +285,17 @@ static void worker_new(struct event *event) udev_event->exec_delay = exec_delay; /* - * Take a "read lock" on the device node; this establishes + * Take a shared lock on the device node; this establishes * a concept of device "ownership" to serialize device - * access. External processes holding a "write lock" will + * access. External processes holding an exclusive lock will * cause udev to skip the event handling; in the case udev - * acquired the lock, the external process will block until + * acquired the lock, the external process can block until * udev has finished its event handling. */ - - /* - * <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(udev_device_get_sysname(dev), "dm-")) { + if (!streq_ptr(udev_device_get_action(dev), "remove") && + streq_ptr("block", udev_device_get_subsystem(dev)) && + !startswith(udev_device_get_sysname(dev), "dm-") && + !startswith(udev_device_get_sysname(dev), "md")) { struct udev_device *d = dev; if (streq_ptr("partition", udev_device_get_devtype(d))) |