[PATCH v2 0/5] Make btrfs-progs really compatible with any kernel version

[Anand Jain <anand.jain@oracle.com>]

Btrfs-progs is a tool for the btrfs kernel and we hope latest btrfs-progs
be compatible w any set of older/newer kernels.

So far mkfs.btrfs and btrfs-convert sets the default features, for eg,
skinny-metadata even if the running kernel does not supports it, and
so the mount fails on the running.

Here in this set of patches will make sure the progs understands the
kernel supported features.

So in this patch, checks if sysfs tells whether the feature is
supported if not, then it will relay on static kernel version which
provided that feature (skinny-metadata here in this example), next
if for some reason the running kernel does not provide the kernel
version, then it will fall back to the original method to enable
the feature with a hope that kernel will support it.

Also the last patch adds a warning when we fail to read either
sysfs features or the running kernel version.

With this I hope all the concerns from the review comments are
addressed.


Anand Jain (5):
  btrfs-progs: introduce framework to check kernel supported features
  btrfs-progs: add framework to check features supported by sysfs
  btrfs-progs: kernel based default features for mkfs
  btrfs-progs: kernel based default features for btrfs-convert
  btrfs-progs: add warning when we fail to read sysfs or kernel version

 btrfs-convert.c |  18 ++++++-
 mkfs.c          |  22 ++++++++-
 utils.c         | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
 utils.h         |   2 +
 4 files changed, 173 insertions(+), 15 deletions(-)

-- 
2.6.2