Ceph » Linux kernel client

rbdtool part is done. i think the driver just needs to have a 'refresh' function to reload the image metadata.

There is a refresh /sys/class/.. interface, however, resizing of an image should be lock protected, and probably shouldn't happen when an image is mounted on the client. There are certain issues that can happen when resizing a block device after being mapped (or even worse -- with in-flight i/o) and these should be avoided.

resizing hte underlying block device has been possible with ext3 since RHEL 4 (~5 years?), so this is something we should support.

e.g., http://blog.gurudelleccelsopicco.org/2009/09/online-lun-expansion-and-partition-resizing-without-reboot-under-linux/