[libvirt] [PATCH 0/8] Resolve some storage and disk backend issues

[Michal Privoznik]

On 02.10.2015 15:41, John Ferlan wrote:
> The following patches resolve a few issues either explicitly generated
> via a bz or seen while investigating/testing the results from bzs.
> 
> Patches 1-2 were discovered while working through patch 3. I found that
> deleting volumes from a pool was always going through the fork processing.
> I neglected to recall that when the volume was placed into the pool the
> mode, uid, & gid values can be updated. Thus on some delete paths we may
> not be called with -1 values. Because we were going through the fork
> processing I found that the error message displayed when a volume target
> no longer exists was wrong - that is the caller was expecting a return
> of -1 and errno being set. In this case looking for ENOENT and continuing
> on with removal of the volume from the pool.
> 
> Patch 3 stands by itself - it's certainly one of those that could be
> deemed don't do that, but since we do check whether the volume was
> removed without libvirt doing the removal, I guess we should check
> whether the volume exists before trying to create it and using the
> refresh pool is the simplest mechanism for all pools.
> 
> Patches 4-7 are intertwined - the disk backend code made the assumption
> that the volume/device being used for the pool was "good". The normal
> mode of operation is to define, build, start, but there's never been
> a "guarantee" or check that what is "on" the volume is valid for the
> type of pool
> 
> Patch 8 was disk backend related - so while I'm in the code, I may as
> well make the change as well.
> 
> John Ferlan (8):
>   virfile: Add extra check for direct delete in virFileRemove
>   virfile: Fix error path for forked virFileRemove
>   storage: Prior to creating a volume, refresh the pool
>   storage: Refactor disk label checking
>   storage: Add param to check whether we can write a disk label
>   storage: Add additional errors/checks for disk label
>   storage: Introduce virStorageBackendDiskStartPool
>   storage: Adjust calculation of alloc/capacity for disk
> 
>  src/libvirt_private.syms           |   1 +
>  src/storage/storage_backend_disk.c | 162 ++++++++++++++++++++++++++++++-------
>  src/storage/storage_driver.c       |   9 +++
>  src/util/virfile.c                 |  11 ++-
>  4 files changed, 151 insertions(+), 32 deletions(-)
> 

ACK series

Michal