On 22.12.18 00:47, Max Reitz wrote:
> 147 currently cannot be run concurrently for two reasons:
> 
> (1) It creates TCP/IP NBD servers on a fixed port.
> 
> (2) It uses a mix of "0.0.0.0", "localhost", and "::1" as host addresses
>     to bind to.  As explained in the commit messages of patches 2 and 3,
>     this results in it potentially actually being able to set up two
>     servers on the same port at the same time -- but connecting to one
>     will always lead to the IPv6 server (regardless of whether you use
>     "localhost" or "::1").  Therefore, even if you get two servers
>     running concurrently, one of the tests will still break because it
>     connects to the wrong one.
> 
> This series fixes these issues.
> 
> 
> Note that even if you do not care about concurrency, it still is a good
> idea to make 147 not use a fixed port to create NBD servers on, as it
> may always be already in use by a totally different application.
> 
> 
> Max Reitz (3):
>   iotests.py: Add qemu_nbd_pipe()
>   iotests: Bind qemu-nbd to localhost in 147
>   iotests: Allow 147 to be run concurrently
> 
>  tests/qemu-iotests/147        | 98 ++++++++++++++++++++++++-----------
>  tests/qemu-iotests/iotests.py | 14 +++++
>  2 files changed, 82 insertions(+), 30 deletions(-)

Applied to my block branch.

Max