[libvirt] [PATCH 0/4] fix yet another regression due to my backingChain rewrite

[Eric Blake]

https://bugzilla.redhat.com/show_bug.cgi?id=903248 details a
regression that I caused, which is tickled by the odd way
in which VDSM uses (abuses?) symlinks to qcow2 files with
relative backing file names.  The first two patches are quite
trivial; the third a bit longer but still straightforward;
and the meat of the series is the fourth patch.

Meanwhile, I know of at least one other regression that I still
need to fix in the same area of code:
https://bugzilla.redhat.com/show_bug.cgi?id=896685 is caused
when cgroups are not present (such as in qemu:///session); I
hope to patch that one tomorrow.

Eric Blake (4):
  storage: factor out large integer reads
  storage: rearrange functions
  storage: refactor metadata lookup
  storage: don't follow backing chain symlinks too eagerly

 src/util/virstoragefile.c | 475 +++++++++++++++++++++++-----------------------
 src/util/virstoragefile.h |   1 +
 2 files changed, 240 insertions(+), 236 deletions(-)

-- 
1.8.1