Re: [libvirt] [RFC PATCH 00/12] Add block write threshold event

Since I'm a procrastinator and I wanted to do this after full node-name support is added I'm kind of late for this release here. Since oVirt is asking for this feature for a very long time I would like to deliver it ASAP though.

This series adds a event which is fired once a guest writes beyond a configured offset in the backing file. The threshold offset is configurable via a new API. This series is in RFC state since I did not manage to polish few details mostly connected to node names: - currently only the top level image can be selected - some blockjobs may clear the remembered node names and thus break this ( re-detection of the backing chain needs to be connected with node name detection ) - the node name detection code is VERY crude

- I'm not sure how well it plays with qcow images, since I select only the top level node (qcow protocol) rather than the file backing it

- the documentation probably sucks since I did not proof-read Any feedback is welcome. Peter Krempa (12): util: storage: Split out useful bits of virStorageFileParseChainIndex util: storage: Add preliminary storage for node names into virStorageSource lib: Introduce event for tracking disk backing file write threshold qemu: monitor: Add support for BLOCK_WRITE_THRESHOLD event qemu: domain: Add helper to lookup disk by node name qemu: domain: Add helper to generate indexed backing store names qemu: process: Wire up firing of the VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD event lib: Add API for setting the threshold size for VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD virsh: Implement 'blockthreshold' command to call virDomainSetBlockThreshold qemu: domain: Add helper to look up disk soruce by the backing store string qemu: implement qemuDomainSetBlockThreshold qemu: WIP: lookup nodenames