tree fe2e04196c833a3b609a1cf947293aafcf90a7bd
parent fa09200b8334f9a6af3f656edae924a98d85630f
author Josef Bacik <josef@redhat.com> 1307473671 -0400
committer Josef Bacik <josef@redhat.com> 1310392727 -0400

Btrfs: do transaction space reservation before joining the transaction

We have to do weird things when handling enospc in the transaction joining code.
Because we've already joined the transaction we cannot commit the transaction
within the reservation code since it will deadlock, so we have to return EAGAIN
and then make sure we don't retry too many times.  Instead of doing this, just
do the reservation the normal way before we join the transaction, that way we
can do whatever we want to try and reclaim space, and then if it fails we know
for sure we are out of space and we can return ENOSPC.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>