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由 Markus Pargmann 提交于
The userspace needs to know when nbd devices are ready for use. Currently no events are created for the userspace which doesn't work for systemd. See the discussion here: https://github.com/systemd/systemd/pull/358 This patch uses a central point to setup the nbd-internal sizes. A ioctl to set a size does not lead to a visible size change. The size of the block device will be kept at 0 until nbd is connected. As soon as it connects, the size will be changed to the real value and a uevent is created. When disconnecting, the blockdevice is set to 0 size and another uevent is generated. Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
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