[PATCH bpf-next v3 0/4] Support RENAME_EXCHANGE on bpffs

[Lorenz Bauer <lmb@xxxxxxxxxxxxxx>]

Add support for renameat2(RENAME_EXCHANGE) on bpffs. This is useful
for atomic upgrades of our sk_lookup control plane.

v3:
- Re-use shmem_exchange (Miklos)

v2:
- Test exchanging a map and a directory (Alexei)
- Use ASSERT macros (Andrii)

Lorenz Bauer (4):
  libfs: move shmem_exchange to simple_rename_exchange
  libfs: support RENAME_EXCHANGE in simple_rename()
  selftests: bpf: convert test_bpffs to ASSERT macros
  selftests: bpf: test RENAME_EXCHANGE and RENAME_NOREPLACE on bpffs

 fs/libfs.c                                    | 29 ++++++-
 include/linux/fs.h                            |  2 +
 mm/shmem.c                                    | 24 +-----
 .../selftests/bpf/prog_tests/test_bpffs.c     | 85 ++++++++++++++++---
 4 files changed, 105 insertions(+), 35 deletions(-)

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2.32.0