G'day! A respin based off v3, which can be found here [0]. Original motivations for introducing this suite of BPF kfuncs can be found here [1]. The primary difference in this version of the patch series is that the suite of VFS related BPF kfuncs added can be used from both sleepable and non-sleepable BPF LSM program types. IOW, the KF_SLEEPABLE annotation has been removed from all of them. Changes sinve v3: * KF_SLEEPABLE annotation has been dropped from all newly introduced VFS related BPF kfuncs. This includes bpf_get_task_exe_file(), bpf_put_file(), and bpf_path_d_path(). Both negative and positive selftests backing these new BPF kfuncs have also been updated accordingly. * buf__sz conditional in bpf_path_d_path() has been updated from buf__sz <= 0, to !buf__sz. * Syntax issues as reported so here [2] have been corrected. [0] https://lore.kernel.org/bpf/20240726085604.2369469-1-mattbobrowski@xxxxxxxxxx/ [1] https://lore.kernel.org/bpf/cover.1708377880.git.mattbobrowski@xxxxxxxxxx/#t [2] https://netdev.bots.linux.dev/static/nipa/874023/13742510/checkpatch/stdout Matt Bobrowski (3): bpf: introduce new VFS based BPF kfuncs selftests/bpf: add negative tests for new VFS based BPF kfuncs selftests/bpf: add positive tests for new VFS based BPF kfuncs fs/Makefile | 1 + fs/bpf_fs_kfuncs.c | 127 ++++++++++++++ .../testing/selftests/bpf/bpf_experimental.h | 26 +++ .../selftests/bpf/prog_tests/verifier.c | 4 + .../selftests/bpf/progs/verifier_vfs_accept.c | 85 +++++++++ .../selftests/bpf/progs/verifier_vfs_reject.c | 161 ++++++++++++++++++ 6 files changed, 404 insertions(+) create mode 100644 fs/bpf_fs_kfuncs.c create mode 100644 tools/testing/selftests/bpf/progs/verifier_vfs_accept.c create mode 100644 tools/testing/selftests/bpf/progs/verifier_vfs_reject.c -- 2.46.0.rc2.264.g509ed76dc8-goog
