[PATCH bpf-next v8 0/2] bpftool: Add recursive map dumping

[Tianyi Chen <hi@tychen.cc>]

Add a recursive keyword to map dump to visit referenced inner maps after
the selected roots, with deduplication and bounded descriptor use.

Changes in v8, addressing Quentin's review:
- Parse MAP first with REQ_ARGS()/map_parse_fds(), then consume trailing
  recursive keywords. Misplaced keywords now get the MAP parser's error.
- Close selected map FDs on trailing-argument errors.
- Test misplaced-keyword diagnostics and repeated recursive keywords.
- Rebase onto current bpf-next.

All 13 focused subtests pass in an x86-64 VM. A syscall trace also
confirms that both maps selected by name are closed on an argument error.
Completion and bpftool synchronization checks pass.

v7: https://lore.kernel.org/r/20260924161434.95116-1-hi@tychen.cc
Review: https://lore.kernel.org/r/6ed88738-4e3b-407c-90c2-bf7717f3e653@kernel.org

Tianyi Chen (2):
  bpftool: Add recursive map dumping
  selftests/bpf: Cover recursive bpftool map dumps

 .../bpf/bpftool/Documentation/bpftool-map.rst |  15 +-
 tools/bpf/bpftool/bash-completion/bpftool     |   3 +
 tools/bpf/bpftool/map.c                       | 147 ++++-
 .../bpf/prog_tests/bpftool_map_dump.c         | 514 ++++++++++++++++++
 4 files changed, 665 insertions(+), 14 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/bpftool_map_dump.c


base-commit: 7af653d4ebf8e2e17e288715cd67ccf7845f4631
-- 
2.55.0