From: KP Singh <kpsingh@xxxxxxxxxx> We already have socket and inode local storage since [1] This patch series: * Implements bpf_local_storage for task_struct. * Implements the bpf_get_current_task_btf helper which returns a BTF pointer to the current task. Not only is this generally cleaner (reading from the task_struct currently requires BPF_CORE_READ), it also allows the BTF pointer to be used in task_local_storage helpers. * In order to implement this helper, a RET_PTR_TO_BTF_ID is introduced which works similar to RET_PTR_TO_BTF_ID_OR_NULL but does not require a nullness check. * Implements a detection in selftests which uses the task local storage to deny a running executable from unlinking itself. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=f836a56e84ffc9f1a1cd73f77e10404ca46a4616 KP Singh (5): bpf: Implement task local storage bpf: Implement get_current_task_btf and RET_PTR_TO_BTF_ID bpf: Fix tests for local_storage bpf: Update selftests for local_storage to use vmlinux.h bpf: Add tests for task_local_storage include/linux/bpf.h | 1 + include/linux/bpf_lsm.h | 23 ++ include/linux/bpf_types.h | 1 + include/uapi/linux/bpf.h | 48 +++ kernel/bpf/Makefile | 1 + kernel/bpf/bpf_lsm.c | 4 + kernel/bpf/bpf_task_storage.c | 327 ++++++++++++++++++ kernel/bpf/syscall.c | 3 +- kernel/bpf/verifier.c | 20 +- kernel/trace/bpf_trace.c | 16 + security/bpf/hooks.c | 2 + .../bpf/bpftool/Documentation/bpftool-map.rst | 3 +- tools/bpf/bpftool/bash-completion/bpftool | 2 +- tools/bpf/bpftool/map.c | 4 +- tools/include/uapi/linux/bpf.h | 48 +++ tools/lib/bpf/libbpf_probes.c | 2 + .../bpf/prog_tests/test_local_storage.c | 89 ++++- .../selftests/bpf/progs/local_storage.c | 78 +++-- 18 files changed, 625 insertions(+), 47 deletions(-) create mode 100644 kernel/bpf/bpf_task_storage.c -- 2.29.0.rc2.309.g374f81d7ae-goog
