libbpf: Add bpf_program__clone() for individual program loading#11126
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kernel-patches-daemon-bpf[bot] wants to merge 2 commits intobpf-next_basefrom
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libbpf: Add bpf_program__clone() for individual program loading#11126kernel-patches-daemon-bpf[bot] wants to merge 2 commits intobpf-next_basefrom
kernel-patches-daemon-bpf[bot] wants to merge 2 commits intobpf-next_basefrom
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Add bpf_program__clone() API that loads a single BPF program from a prepared BPF object into the kernel, returning a file descriptor owned by the caller. After bpf_object__prepare(), callers can use bpf_program__clone() to load individual programs with custom bpf_prog_load_opts, instead of loading all programs at once via bpf_object__load(). Non-zero fields in opts override the defaults derived from the program and object internals; passing NULL opts populates everything automatically. Internally, bpf_program__clone() resolves BTF-based attach targets (attach_btf_id, attach_btf_obj_fd) and the sleepable flag, fills func/line info, fd_array, license, and kern_version from the prepared object before calling bpf_prog_load(). Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Replace veristat's per-program object re-opening with bpf_program__clone(). Previously, veristat opened a separate bpf_object for every program in a multi-program object file, iterated all programs to enable only the target one, and then loaded the entire object. Use bpf_object__prepare() once, then call bpf_program__clone() for each program individually. This lets veristat load programs one at a time from a single prepared object. The caller now owns the returned fd and closes it after collecting stats. Remove the special single-program fast path and the per-file early exit in handle_verif_mode() so all files are always processed. Split fixup_obj() into fixup_obj_maps() for object-wide map fixups that must run before bpf_object__prepare(), and fixup_obj() for per-program fixups (struct_ops masking, freplace type guessing) that run before each bpf_program__clone() call. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
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Pull request for series with
subject: libbpf: Add bpf_program__clone() for individual program loading
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1055999