On Tue, Feb 8, 2022 at 11:13 AM Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote: > > From: Alexei Starovoitov <ast@xxxxxxxxxx> > > The libbpf performs a set of complex operations to load BPF programs. > With "loader program" and "CO-RE in the kernel" the loading job of > libbpf was diminished. The light skeleton became lean enough to perform > program loading and map creation tasks without libbpf. > It's now possible to tweak it further to make light skeleton usable > out of user space and out of kernel module. > This allows bpf_preload.ko to drop user-mode-driver usage, > drop host compiler dependency, allow cross compilation and simplify the code. > It's a building block toward safe and portable kernel modules. > > v1->v2: > - removed redundant anon struct and added comments (Andrii's reivew) > - added Yonghong's ack > - fixed build warning when JIT is off > > Alexei Starovoitov (5): > bpf: Extend sys_bpf commands for bpf_syscall programs. > libbpf: Prepare light skeleton for the kernel. > bpftool: Generalize light skeleton generation. > bpf: Update iterators.lskel.h. > bpf: Convert bpf_preload.ko to use light skeleton. > See question about error handling for rodata in skeleton. But otherwise LGTM. For the series: Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx> > kernel/bpf/inode.c | 39 +--- > kernel/bpf/preload/Kconfig | 9 +- > kernel/bpf/preload/Makefile | 14 +- > kernel/bpf/preload/bpf_preload.h | 8 +- > kernel/bpf/preload/bpf_preload_kern.c | 119 +++++------ > kernel/bpf/preload/bpf_preload_umd_blob.S | 7 - > .../preload/iterators/bpf_preload_common.h | 13 -- > kernel/bpf/preload/iterators/iterators.c | 108 ---------- > .../bpf/preload/iterators/iterators.lskel.h | 28 +-- > kernel/bpf/syscall.c | 40 +++- > tools/bpf/bpftool/gen.c | 45 ++-- > tools/lib/bpf/skel_internal.h | 193 ++++++++++++++++-- > 12 files changed, 319 insertions(+), 304 deletions(-) > delete mode 100644 kernel/bpf/preload/bpf_preload_umd_blob.S > delete mode 100644 kernel/bpf/preload/iterators/bpf_preload_common.h > delete mode 100644 kernel/bpf/preload/iterators/iterators.c > > -- > 2.30.2 >
