[PATCH mptcp-next v6 0/9] use helpers in lib.sh and net_helpers.sh

["Matthieu Baerts (NGI0)" <matttbe@kernel.org>]

(This is a new version for the series created by Geliang. @Geliang: I
 hope that's OK for you like that, it was easier to describing the
 modifications by email. I validated my changes by running MPTCP
 selftests only)

This set uses the public helpers defined in net selftests to replace
helpers in mptcp_lib.sh.

v6:
 - Replace "rename ns in setup_ns" by "remove 'ns' var in setup_ns": we
   don't need it, avoid extra conflicts.

v5: (Matt)
 - New patches: 1-6: some unrelated fixes, some modifications to avoid
   adding workaround on our side (changing variable names, trap, etc.)
 - "rename ns in setup_ns": drop the modifications in cleanup_ns, exit
   in case of error, and updated commit message.
 - Drop patches 2, 4, 5/6 from v4.

v4:
 - two more fixes added
 - exit when setup_ns fails in mptcp_lib_ns_init

v3:
 - address Matt's comments in v2 (thanks, it's very useful.)
 - don't rename ns in diag.sh, but in lib.sh
 - ns in get_counter needs to be renamed too
 - add a ns_name valid check in setup_ns
 - drop $NS_LIST in mptcp_lib_ns_init
 - don't drop mptcp_lib_ns_init, use cleanup_ns in it
 - don't use cleanup_all_ns, still use mptcp_lib_ns_init

v2:
 - only patch 3 updated, mptcp_join.sh, move cleanup_all_ns from
   cleanup_partial to cleanup, setup_ns will delete existing
   namespaces automatically.
 - update commit logs.

Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
Changes in v6:
- Link to v5: https://lore.kernel.org/r/20240524-selftests-net-lib-fixes-v5-0-b9e0968571a3@kernel.org

---
Geliang Tang (3):
      selftests: net: lib: remove 'ns' var in setup_ns
      selftests: mptcp: lib: use setup/cleanup_ns helpers
      selftests: mptcp: lib: use wait_local_port_listen helper

Matthieu Baerts (NGI0) (6):
      selftests: net: lib: set 'i' as local
      selftests: net: lib: support errexit with busywait
      selftests: net: lib: avoid error removing empty netns name
      selftests: net: lib: ignore possible error
      selftests: net: lib: remove ns from list after clean-up
      selftests: net: lib: do not set ns var as readonly

 tools/testing/selftests/net/lib.sh             | 71 +++++++++++++++-----------
 tools/testing/selftests/net/mptcp/mptcp_lib.sh | 33 ++++--------
 2 files changed, 50 insertions(+), 54 deletions(-)
---
base-commit: 55aceb609c1baec3e762e938e2028df7ecd545e1
change-id: 20240524-selftests-net-lib-fixes-5a70b8d3b828

Best regards,
-- 
Matthieu Baerts (NGI0) <matttbe@kernel.org>