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Marchesi" To: James Hilliard Cc: Andrii Nakryiko , bpf , david.faust@oracle.com Subject: Re: bpftool gen object doesn't handle GCC built BPF ELF files References: <87wncnd5dd.fsf@oracle.com> <8735fbcv3x.fsf@oracle.com> <87v8s65hdc.fsf@oracle.com> <8735fa3unq.fsf@oracle.com> <87tu7p3o4k.fsf@oracle.com> <87h73p1f5s.fsf@oracle.com> <87k08lunga.fsf@oracle.com> <87fsj8vjcy.fsf@oracle.com> Date: Sun, 10 Jul 2022 22:22:10 +0200 In-Reply-To: <87fsj8vjcy.fsf@oracle.com> (Jose E. 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Marchesi >>> wrote: >>>> >>>> >>>> > On Sat, Jul 9, 2022 at 4:41 PM Jose E. Marchesi >>>> > wrote: >>>> >> >>>> >> >>>> >> > On Sat, Jul 9, 2022 at 2:32 PM James Hilliard wrote: >>>> >> >> >>>> >> >> On Sat, Jul 9, 2022 at 2:21 PM Jose E. Marchesi >>>> >> >> wrote: >>>> >> >> > >>>> >> >> > >>>> >> >> > > On Sat, Jul 9, 2022 at 11:24 AM Jose E. Marchesi >>>> >> >> > > wrote: >>>> >> >> > >> >>>> >> >> > >> >>>> >> >> > >> > On Fri, Jul 8, 2022 at 12:33 PM Jose E. Marchesi >>>> >> >> > >> > wrote: >>>> >> >> > >> >> >>>> >> >> > >> >> >>>> >> >> > >> >> >> On Wed, Jul 6, 2022 at 10:13 AM James Hilliard >>>> >> >> > >> >> >> wrote: >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> Note I'm testing with the following patches: >>>> >> >> > >> >> >>> >> https://lore.kernel.org/bpf/20220706111839.1247911-1-james.hilliard1@gma= il.com/ >>>> >> >> > >> >> >>> >> https://lore.kernel.org/bpf/20220706140623.2917858-1-james.hilliard1@gma= il.com/ >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> It would appear there's some compatibility issues wi= th bpftool gen and >>>> >> >> > >> >> >>> GCC, not sure what side though is wrong here: >>>> >> >> > >> >> >>> /home/buildroot/buildroot/output/per-package/systemd= /host/sbin/bpftool >>>> >> >> > >> >> >>> gen object src/core/bpf/restrict_ifaces/restrict-ifa= ces.bpf.o >>>> >> >> > >> >> >>> src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.uns= tripped.o >>>> >> >> > >> >> >>> libbpf: failed to find BTF info for global/extern sy= mbol 'sd_restrictif_i' >>>> >> >> > >> >> >>> Error: failed to link >>>> >> >> > >> >> >>> 'src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.un= stripped.o': >>>> >> >> > >> >> >>> Unknown error -2 (-2) >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> Relevant difference seems to be this: >>>> >> >> > >> >> >>> GCC: >>>> >> >> > >> >> >>> [55] FUNC 'sd_restrictif_i' type_id=3D47 linkage=3Ds= tatic >>>> >> >> > >> >> >>> Clang: >>>> >> >> > >> >> >>> [27] FUNC 'sd_restrictif_i' type_id=3D26 linkage=3Dg= lobal >>>> >> >> > >> >> > >>>> >> >> > >> >> > For functions GCC generates a BTF_KIND_FUNC entry, whi= ch has no linkage >>>> >> >> > >> >> > information, or so we thought: I just looked at bpftoo= l/btf.c and I >>>> >> >> > >> >> > found the linkage info for function types is expected = to be encoded in >>>> >> >> > >> >> > the vlen field of BTF_KIND_FUNC entries (why not addin= g a btf_func >>>> >> >> > >> >> > instead???) which is surprising to say the least. >>>> >> >> > >> >> > >>>> >> >> > >> >> > We are changing GCC to encode the linkage info in vlen= for these types. >>>> >> >> > >> >> > Thanks for reporting this. >>>> >> >> > >> >> >>>> >> >> > >> >> Patch sent to GCC upstream: >>>> >> >> > >> >> https://gcc.gnu.org/pipermail/gcc-patches/2022-July/5980= 90.html >>>> >> >> > >> > >>>> >> >> > >> > I applied that patch on top of GCC 12.1.0 and it appears = to fix the >>>> >> >> > >> > bpftool gen object bug. >>>> >> >> > >> > >>>> >> >> > >> > I am however now hitting a different error during skeleto= n generation: >>>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host= /sbin/bpftool >>>> >> >> > >> > gen skeleton src/core/bpf/restrict_ifaces/restrict-ifaces= .bpf.o >>>> >> >> > >> > libbpf: elf: skipping unrecognized data section(9) .comme= nt >>>> >> >> > >> > libbpf: failed to alloc map 'restrict.bss' content buffer= : -22 >>>> >> >> > >> > Error: failed to open BPF object file: Invalid argument >>>> >> >> > >> >>>> >> >> > >> What is the size of the .bss section in the object file? T= ry with: >>>> >> >> > >> >>>> >> >> > >> $ size restrict-ifaces.bpf.o >>>> >> >> > > >>>> >> >> > > $ size >>>> >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/re= strict-ifaces.bpf.o >>>> >> >> > > text data bss dec hex filen= ame >>>> >> >> > > 386 25 0 411 19b >>>> >> >> > > >> output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-= ifaces.bpf.o >>>> >> >> > >>>> >> >> > Right, so the .bss section is empty. I see a `const volatile = unsigned >>>> >> >> > char is_allow_list =3D 0;' in restrict-ifaces.bpf.c, but that = goes to >>>> >> >> > .data and not to .bss, as expected. >>>> >> >> > >>>> >> >> > If you build restrict-ifaces.bpf.o with LLVM, is the bss still= empty? I >>>> >> >> > don't think the code in libbpf.c even checks for this eventual= ity... >>>> >> >> >>>> >> >> LLVM version(which skeleton generation works with): >>>> >> >> $ size restrict-ifaces.bpf.o >>>> >> >> text data bss dec hex filename >>>> >> >> 323 24 0 347 15b restrict-= ifaces.bpf.o >>>> >> >> >>>> >> >> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin= /bpftool >>>> >> >> btf dump file restrict-ifaces.bpf.o format raw >>>> >> >> [1] PTR '(anon)' type_id=3D3 >>>> >> >> [2] INT 'int' size=3D4 bits_offset=3D0 nr_bits=3D32 encoding=3DS= IGNED >>>> >> >> [3] ARRAY '(anon)' type_id=3D2 index_type_id=3D4 nr_elems=3D1 >>>> >> >> [4] INT '__ARRAY_SIZE_TYPE__' size=3D4 bits_offset=3D0 nr_bits= =3D32 encoding=3D(none) >>>> >> >> [5] PTR '(anon)' type_id=3D6 >>>> >> >> [6] TYPEDEF '__u32' type_id=3D7 >>>> >> >> [7] INT 'unsigned int' size=3D4 bits_offset=3D0 nr_bits=3D32 enc= oding=3D(none) >>>> >> >> [8] PTR '(anon)' type_id=3D9 >>>> >> >> [9] TYPEDEF '__u8' type_id=3D10 >>>> >> >> [10] INT 'unsigned char' size=3D1 bits_offset=3D0 nr_bits=3D8 en= coding=3D(none) >>>> >> >> [11] STRUCT '(anon)' size=3D24 vlen=3D3 >>>> >> >> 'type' type_id=3D1 bits_offset=3D0 >>>> >> >> 'key' type_id=3D5 bits_offset=3D64 >>>> >> >> 'value' type_id=3D8 bits_offset=3D128 >>>> >> >> [12] VAR 'sd_restrictif' type_id=3D11, linkage=3Dglobal >>>> >> >> [13] PTR '(anon)' type_id=3D14 >>>> >> >> [14] CONST '(anon)' type_id=3D15 >>>> >> >> [15] STRUCT '__sk_buff' size=3D192 vlen=3D33 >>>> >> >> 'len' type_id=3D6 bits_offset=3D0 >>>> >> >> 'pkt_type' type_id=3D6 bits_offset=3D32 >>>> >> >> 'mark' type_id=3D6 bits_offset=3D64 >>>> >> >> 'queue_mapping' type_id=3D6 bits_offset=3D96 >>>> >> >> 'protocol' type_id=3D6 bits_offset=3D128 >>>> >> >> 'vlan_present' type_id=3D6 bits_offset=3D160 >>>> >> >> 'vlan_tci' type_id=3D6 bits_offset=3D192 >>>> >> >> 'vlan_proto' type_id=3D6 bits_offset=3D224 >>>> >> >> 'priority' type_id=3D6 bits_offset=3D256 >>>> >> >> 'ingress_ifindex' type_id=3D6 bits_offset=3D288 >>>> >> >> 'ifindex' type_id=3D6 bits_offset=3D320 >>>> >> >> 'tc_index' type_id=3D6 bits_offset=3D352 >>>> >> >> 'cb' type_id=3D16 bits_offset=3D384 >>>> >> >> 'hash' type_id=3D6 bits_offset=3D544 >>>> >> >> 'tc_classid' type_id=3D6 bits_offset=3D576 >>>> >> >> 'data' type_id=3D6 bits_offset=3D608 >>>> >> >> 'data_end' type_id=3D6 bits_offset=3D640 >>>> >> >> 'napi_id' type_id=3D6 bits_offset=3D672 >>>> >> >> 'family' type_id=3D6 bits_offset=3D704 >>>> >> >> 'remote_ip4' type_id=3D6 bits_offset=3D736 >>>> >> >> 'local_ip4' type_id=3D6 bits_offset=3D768 >>>> >> >> 'remote_ip6' type_id=3D17 bits_offset=3D800 >>>> >> >> 'local_ip6' type_id=3D17 bits_offset=3D928 >>>> >> >> 'remote_port' type_id=3D6 bits_offset=3D1056 >>>> >> >> 'local_port' type_id=3D6 bits_offset=3D1088 >>>> >> >> 'data_meta' type_id=3D6 bits_offset=3D1120 >>>> >> >> '(anon)' type_id=3D18 bits_offset=3D1152 >>>> >> >> 'tstamp' type_id=3D20 bits_offset=3D1216 >>>> >> >> 'wire_len' type_id=3D6 bits_offset=3D1280 >>>> >> >> 'gso_segs' type_id=3D6 bits_offset=3D1312 >>>> >> >> '(anon)' type_id=3D22 bits_offset=3D1344 >>>> >> >> 'gso_size' type_id=3D6 bits_offset=3D1408 >>>> >> >> 'hwtstamp' type_id=3D20 bits_offset=3D1472 >>>> >> >> [16] ARRAY '(anon)' type_id=3D6 index_type_id=3D4 nr_elems=3D5 >>>> >> >> [17] ARRAY '(anon)' type_id=3D6 index_type_id=3D4 nr_elems=3D4 >>>> >> >> [18] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> 'flow_keys' type_id=3D19 bits_offset=3D0 >>>> >> >> [19] PTR '(anon)' type_id=3D34 >>>> >> >> [20] TYPEDEF '__u64' type_id=3D21 >>>> >> >> [21] INT 'unsigned long long' size=3D8 bits_offset=3D0 nr_bits= =3D64 encoding=3D(none) >>>> >> >> [22] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> 'sk' type_id=3D23 bits_offset=3D0 >>>> >> >> [23] PTR '(anon)' type_id=3D35 >>>> >> >> [24] FUNC_PROTO '(anon)' ret_type_id=3D2 vlen=3D1 >>>> >> >> 'sk' type_id=3D13 >>>> >> >> [25] FUNC 'sd_restrictif_e' type_id=3D24 linkage=3Dglobal >>>> >> >> [26] FUNC 'sd_restrictif_i' type_id=3D24 linkage=3Dglobal >>>> >> >> [27] CONST '(anon)' type_id=3D28 >>>> >> >> [28] VOLATILE '(anon)' type_id=3D9 >>>> >> >> [29] VAR 'is_allow_list' type_id=3D27, linkage=3Dglobal >>>> >> >> [30] CONST '(anon)' type_id=3D31 >>>> >> >> [31] INT 'char' size=3D1 bits_offset=3D0 nr_bits=3D8 encoding=3D= SIGNED >>>> >> >> [32] ARRAY '(anon)' type_id=3D30 index_type_id=3D4 nr_elems=3D18 >>>> >> >> [33] VAR '_license' type_id=3D32, linkage=3Dstatic >>>> >> >> [34] FWD 'bpf_flow_keys' fwd_kind=3Dstruct >>>> >> >> [35] FWD 'bpf_sock' fwd_kind=3Dstruct >>>> >> >> [36] DATASEC '.rodata' size=3D1 vlen=3D1 >>>> >> >> type_id=3D29 offset=3D0 size=3D1 (VAR 'is_allow_list') >>>> >> >> [37] DATASEC 'license' size=3D18 vlen=3D1 >>>> >> >> type_id=3D33 offset=3D0 size=3D18 (VAR '_license') >>>> >> >> [38] DATASEC '.maps' size=3D24 vlen=3D1 >>>> >> >> type_id=3D12 offset=3D0 size=3D24 (VAR 'sd_restrictif') >>>> >> >> >>>> >> > >>>> >> > Skeleton generation debug output for GCC(failing) and LLVM(workin= g) >>>> >> > which may be helpful: >>>> >> >>>> >> Indeed it was helpful :) >>>> >> >>>> >> The GNU assembler generates an empty .bss section. This is a well >>>> >> established behavior in GAS that happens in all supported targets. >>>> >> >>>> >> The LLVM assembler doesn't generate an empty .bss section. >>>> >> >>>> >> bpftool chokes on the empty .bss section. >>>> >> >>>> >> In this case I would suggest to fix bpf_object__init_global_data_ma= ps in >>>> >> order to skip empty sections. >>>> >> >>>> >> Something like this: >>>> > >>>> > Hmm, that seems to segfault: >>>> >>>> Yes, I see in bpf_object__elf_collect that sec_desc->data is not >>>> initialized when a section is not recognized. In this case, this >>>> happens with .comment. >>>> >>>> All right then: >>>> >>>> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c >>>> index e89cc9c885b3..887b78780099 100644 >>>> --- a/tools/lib/bpf/libbpf.c >>>> +++ b/tools/lib/bpf/libbpf.c >>>> @@ -1591,6 +1591,10 @@ static int bpf_object__init_global_data_maps(st= ruct bpf_object *obj) >>>> for (sec_idx =3D 1; sec_idx < obj->efile.sec_cnt; sec_idx++) { >>>> sec_desc =3D &obj->efile.secs[sec_idx]; >>>> >>>> + /* Skip recognized sections with size 0. */ >>>> + if (sec_desc->data && sec_desc->data->d_size =3D=3D 0= ) >>>> + continue; >>>> + >>>> switch (sec_desc->sec_type) { >>>> case SEC_DATA: >>>> sec_name =3D elf_sec_name(obj, elf_sec_by_idx(= obj, sec_idx)); >>> >>> Ok, skeleton is now getting generated successfully, however it differs = from the >>> clang version so there's a build error when we include/use the header: >>> ../src/core/restrict-ifaces.c: In function =E2=80=98prepare_restrict_if= aces_bpf=E2=80=99: >>> ../src/core/restrict-ifaces.c:45:14: error: =E2=80=98struct >>> restrict_ifaces_bpf=E2=80=99 has no member named =E2=80=98rodata=E2=80= =99; did you mean >>> =E2=80=98data=E2=80=99? >>> 45 | obj->rodata->is_allow_list =3D is_allow_list; >>> | ^~~~~~ >>> | data >>> >>> The issue appears to be that clang generates "rodata" members in >>> restrict_ifaces_bpf while with gcc we get "data" members instead. >> >> This is because the BPF GCC port is putting the >> >> const volatile unsigned char is_allow_list =3D 0; >> >> in a .data section instead of .rodata, due to the `volatile'. The >> x86_64 GCC seems to use .rodata. >> >> Looking at why the PBF port does this... > > So, turns out GCC puts zero-initialized `const volatile' variables in > .data sections (and not .rodata) in all the targets I have tried, like > x86_64 and aarch64. > > So this is a LLVM and GCC divergence :/ See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D25521. You may try, as a workaround: __attribute__((section(".rodata"))) const volatile unsigned char is_allow_l= ist =3D 0; But that will use permissions "aw" for the .rodata section (and you will get a warning from the assembler.) It may be problematic for libbpf. >>> Differences below: >>> >>> GCC: >>> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftoo= l >>> --debug gen skeleton >>> output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict= -ifaces.bpf.o >>> libbpf: loading object 'restrict_ifaces_bpf' from buffer >>> libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=3D2 >>> libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=3D1 >>> libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=3D8 >>> libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, t= ype=3D1 >>> libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at >>> insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>> libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, flags 6, = type=3D1 >>> libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at >>> insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>> libbpf: elf: section(7) license, size 18, link 0, flags 2, type=3D1 >>> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>> libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=3D1 >>> libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=3D1 >>> libbpf: elf: skipping unrecognized data section(9) .comment >>> libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags >>> 40, type=3D9 >>> libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>> flags 40, type=3D9 >>> libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=3D1 >>> libbpf: looking for externs among 14 symbols... >>> libbpf: collected 0 externs total >>> libbpf: map 'sd_restrictif': at sec_idx 8, offset 0. >>> libbpf: map 'sd_restrictif': found type =3D 1. >>> libbpf: map 'sd_restrictif': found key [12], sz =3D 4. >>> libbpf: map 'sd_restrictif': found value [3], sz =3D 1. >>> libbpf: map 'restrict.data' (global data): at sec_idx 3, offset 0, flag= s 400. >>> libbpf: map 1 is "restrict.data" >>> libbpf: sec '.relcgroup_skb/egress': collecting relocation for >>> section(5) 'cgroup_skb/egress' >>> libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd_restr= ictif' >>> libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 8, off >>> 0) for insn #4 >>> libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is_allow= _list' >>> libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.data, sec >>> 3, off 0) for insn 7 >>> libbpf: sec '.relcgroup_skb/ingress': collecting relocation for >>> section(6) 'cgroup_skb/ingress' >>> libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 'sd_rest= rictif' >>> libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 8, off >>> 0) for insn #4 >>> libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'is_allo= w_list' >>> libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.data, sec >>> 3, off 0) for insn 7 >>> /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ >>> >>> /* THIS FILE IS AUTOGENERATED BY BPFTOOL! */ >>> #ifndef __RESTRICT_IFACES_BPF_SKEL_H__ >>> #define __RESTRICT_IFACES_BPF_SKEL_H__ >>> >>> #include >>> #include >>> #include >>> >>> struct restrict_ifaces_bpf { >>> struct bpf_object_skeleton *skeleton; >>> struct bpf_object *obj; >>> struct { >>> struct bpf_map *sd_restrictif; >>> struct bpf_map *data; >>> } maps; >>> struct { >>> struct bpf_program *sd_restrictif_e; >>> struct bpf_program *sd_restrictif_i; >>> } progs; >>> struct { >>> struct bpf_link *sd_restrictif_e; >>> struct bpf_link *sd_restrictif_i; >>> } links; >>> struct restrict_ifaces_bpf__data { >>> __u8 is_allow_list; >>> } *data; >>> >>> #ifdef __cplusplus >>> static inline struct restrict_ifaces_bpf *open(const struct >>> bpf_object_open_opts *opts =3D nullptr); >>> static inline struct restrict_ifaces_bpf *open_and_load(); >>> static inline int load(struct restrict_ifaces_bpf *skel); >>> static inline int attach(struct restrict_ifaces_bpf *skel); >>> static inline void detach(struct restrict_ifaces_bpf *skel); >>> static inline void destroy(struct restrict_ifaces_bpf *skel); >>> static inline const void *elf_bytes(size_t *sz); >>> #endif /* __cplusplus */ >>> }; >>> >>> static void >>> restrict_ifaces_bpf__destroy(struct restrict_ifaces_bpf *obj) >>> { >>> if (!obj) >>> return; >>> if (obj->skeleton) >>> bpf_object__destroy_skeleton(obj->skeleton); >>> free(obj); >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj); >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open_opts(const struct bpf_object_open_opts *opts) >>> { >>> struct restrict_ifaces_bpf *obj; >>> int err; >>> >>> obj =3D (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj)); >>> if (!obj) { >>> errno =3D ENOMEM; >>> return NULL; >>> } >>> >>> err =3D restrict_ifaces_bpf__create_skeleton(obj); >>> if (err) >>> goto err_out; >>> >>> err =3D bpf_object__open_skeleton(obj->skeleton, opts); >>> if (err) >>> goto err_out; >>> >>> return obj; >>> err_out: >>> restrict_ifaces_bpf__destroy(obj); >>> errno =3D -err; >>> return NULL; >>> } >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open(void) >>> { >>> return restrict_ifaces_bpf__open_opts(NULL); >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__load(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__load_skeleton(obj->skeleton); >>> } >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open_and_load(void) >>> { >>> struct restrict_ifaces_bpf *obj; >>> int err; >>> >>> obj =3D restrict_ifaces_bpf__open(); >>> if (!obj) >>> return NULL; >>> err =3D restrict_ifaces_bpf__load(obj); >>> if (err) { >>> restrict_ifaces_bpf__destroy(obj); >>> errno =3D -err; >>> return NULL; >>> } >>> return obj; >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__attach(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__attach_skeleton(obj->skeleton); >>> } >>> >>> static inline void >>> restrict_ifaces_bpf__detach(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__detach_skeleton(obj->skeleton); >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz); >>> >>> static inline int >>> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj) >>> { >>> struct bpf_object_skeleton *s; >>> int err; >>> >>> s =3D (struct bpf_object_skeleton *)calloc(1, sizeof(*s)); >>> if (!s) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->sz =3D sizeof(*s); >>> s->name =3D "restrict_ifaces_bpf"; >>> s->obj =3D &obj->obj; >>> >>> /* maps */ >>> s->map_cnt =3D 2; >>> s->map_skel_sz =3D sizeof(*s->maps); >>> s->maps =3D (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_sk= el_sz); >>> if (!s->maps) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->maps[0].name =3D "sd_restrictif"; >>> s->maps[0].map =3D &obj->maps.sd_restrictif; >>> >>> s->maps[1].name =3D "restrict.data"; >>> s->maps[1].map =3D &obj->maps.data; >>> s->maps[1].mmaped =3D (void **)&obj->data; >>> >>> /* programs */ >>> s->prog_cnt =3D 2; >>> s->prog_skel_sz =3D sizeof(*s->progs); >>> s->progs =3D (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->pro= g_skel_sz); >>> if (!s->progs) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->progs[0].name =3D "sd_restrictif_e"; >>> s->progs[0].prog =3D &obj->progs.sd_restrictif_e; >>> s->progs[0].link =3D &obj->links.sd_restrictif_e; >>> >>> s->progs[1].name =3D "sd_restrictif_i"; >>> s->progs[1].prog =3D &obj->progs.sd_restrictif_i; >>> s->progs[1].link =3D &obj->links.sd_restrictif_i; >>> >>> s->data =3D (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz); >>> >>> obj->skeleton =3D s; >>> return 0; >>> err: >>> bpf_object__destroy_skeleton(s); >>> return err; >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz) >>> { >>> *sz =3D 5616; >>> return (const void *)"\ >>> \x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\xb0\x12\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\= x0d\0\ >>> \x01\0\0\x2e\x73\x74\x72\x74\x61\x62\0\x2e\x73\x79\x6d\x74\x61\x62\0\x2= e\x64\ >>> \x61\x74\x61\0\x2e\x62\x73\x73\0\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x6= 2\x2f\ >>> \x65\x67\x72\x65\x73\x73\0\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\= x69\x6e\ >>> \x67\x72\x65\x73\x73\0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x7= 3\0\x2e\ >>> \x63\x6f\x6d\x6d\x65\x6e\x74\0\x72\x65\x73\x74\x72\x69\x63\x74\x2d\x69\= x66\x61\ >>> \x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\x5f\x6c\x69\x63\x65\x6e\x73\x65\= 0\x73\ >>> \x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x73\x64\x5f\= x72\x65\ >>> \x73\x74\x72\x69\x63\x74\x69\x66\0\x69\x73\x5f\x61\x6c\x6c\x6f\x77\x5f\= x6c\x69\ >>> \x73\x74\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x69\= 0\x2e\ >>> \x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x65\x67\x72\x6= 5\x73\ >>> \x73\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x69\= x6e\x67\ >>> \x72\x65\x73\x73\0\x2e\x42\x54\x46\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\x58\0\0\0\x04\0\xf1\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\ >>> \x03\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x04\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x05\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \x03\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x07\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\x6e\0\0\0\x01\0\x07\0\0\0\0\0\0\0\0\0\x12\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\x03\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x09\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\x77\0\0\0\x12\0\x05\0\0\0\0\0\0\0\0\0\xb8\0\0\0\= 0\0\0\0\ >>> \x87\0\0\0\x11\0\x08\0\0\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\0\x95\0\0\0\x11\= 0\x03\0\ >>> \0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xa3\0\0\0\x12\0\x06\0\0\0\0\0\0\0\0\= 0\xb8\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\x61\x10\x28\0\0\0\0\0\x63\x0a\xfc\xff\0\0\= 0\0\xbf\ >>> \xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x13\0\0\= 0\0\0\0\ >>> \x57\x03\0\0\xff\0\0\0\x15\x03\x05\0\0\0\0\0\xbf\x02\0\0\0\0\0\0\x87\x0= 2\0\0\0\ >>> \0\0\0\x4f\x20\0\0\0\0\0\0\x77\0\0\0\x3f\0\0\0\x95\0\0\0\0\0\0\0\xb7\x0= 1\0\0\ >>> \x01\0\0\0\x15\0\x01\0\0\0\0\0\xbf\x31\0\0\0\0\0\0\xbf\x10\0\0\0\0\0\0\= x57\0\0\ >>> \0\x01\0\0\0\x95\0\0\0\0\0\0\0\x61\x10\x28\0\0\0\0\0\x63\x0a\xfc\xff\0\= 0\0\0\ >>> \xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x13\= 0\0\0\0\ >>> \0\0\x57\x03\0\0\xff\0\0\0\x15\x03\x05\0\0\0\0\0\xbf\x02\0\0\0\0\0\0\x8= 7\x02\0\ >>> \0\0\0\0\0\x4f\x20\0\0\0\0\0\0\x77\0\0\0\x3f\0\0\0\x95\0\0\0\0\0\0\0\xb= 7\x01\0\ >>> \0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xbf\x31\0\0\0\0\0\0\xbf\x10\0\0\0\0\0\= 0\x57\0\ >>> \0\0\x01\0\0\0\x95\0\0\0\0\0\0\0\x4c\x47\x50\x4c\x2d\x32\x2e\x31\x2d\x6= f\x72\ >>> \x2d\x6c\x61\x74\x65\x72\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x47\x43\x43\x3a\x20\x28\x42\x75\x69\x6c\x64\x72\x6f\x6f\x74\= x20\x32\ >>> \x30\x32\x32\x2e\x30\x35\x2d\x31\x33\x32\x2d\x67\x35\x32\x38\x62\x35\x6= 1\x36\ >>> \x35\x66\x36\x29\x20\x31\x32\x2e\x31\x2e\x30\0\0\0\0\0\0\0\0\x20\0\0\0\= 0\0\0\0\ >>> \x01\0\0\0\x0b\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\0\x0c\0\0\0\x20\0\0\0\0\= 0\0\0\ >>> \x01\0\0\0\x0b\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\0\x0c\0\0\0\x9f\xeb\x01\= 0\x18\0\ >>> \0\0\0\0\0\0\x9c\x07\0\0\x9c\x07\0\0\x62\x06\0\0\x01\0\0\0\0\0\0\x01\x0= 1\0\0\0\ >>> \x08\0\0\x03\x0d\0\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\x02\x1b\0\0\0\0\0\0\= x08\x02\ >>> \0\0\0\0\0\0\0\0\0\0\x0a\x03\0\0\0\0\0\0\0\0\0\0\x09\x04\0\0\0\x20\0\0\= 0\0\0\0\ >>> \x01\x02\0\0\0\x10\0\0\x01\x2a\0\0\0\0\0\0\x01\x02\0\0\0\x10\0\0\0\x3d\= 0\0\0\0\ >>> \0\0\x08\x07\0\0\0\x43\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\x01\x47\0\0\0\= 0\0\0\ >>> \x08\x09\0\0\0\x4d\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\0\x5a\0\0\0\0\0\0\= x08\x0b\ >>> \0\0\0\x60\0\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\x01\x6e\0\0\0\0\0\0\x01\x0= 8\0\0\0\ >>> \x40\0\0\0\x85\0\0\0\0\0\0\x08\x0e\0\0\0\x8b\0\0\0\0\0\0\x01\x08\0\0\0\= x40\0\0\ >>> \0\x9d\0\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\x01\xa6\0\0\0\0\0\0\x01\x01\0\= 0\0\x08\ >>> \0\0\x03\0\0\0\0\0\0\0\x0a\x12\0\0\0\xab\0\0\0\0\0\0\x08\x08\0\0\0\xb2\= 0\0\0\0\ >>> \0\0\x08\x0c\0\0\0\xb9\0\0\0\x1f\0\0\x06\x04\0\0\0\xc6\0\0\0\0\0\0\0\xd= a\0\0\0\ >>> \x01\0\0\0\xec\0\0\0\x02\0\0\0\xff\0\0\0\x03\0\0\0\x17\x01\0\0\x04\0\0\= 0\x35\ >>> \x01\0\0\x05\0\0\0\x4e\x01\0\0\x06\0\0\0\x68\x01\0\0\x07\0\0\0\x81\x01\= 0\0\x08\ >>> \0\0\0\x9b\x01\0\0\x09\0\0\0\xb1\x01\0\0\x0a\0\0\0\xce\x01\0\0\x0b\0\0\= 0\xe4\ >>> \x01\0\0\x0c\0\0\0\xff\x01\0\0\x0d\0\0\0\x19\x02\0\0\x0e\0\0\0\x2d\x02\= 0\0\x0f\ >>> \0\0\0\x42\x02\0\0\x10\0\0\0\x56\x02\0\0\x11\0\0\0\x6a\x02\0\0\x12\0\0\= 0\x80\ >>> \x02\0\0\x13\0\0\0\x9c\x02\0\0\x14\0\0\0\xbd\x02\0\0\x15\0\0\0\xe0\x02\= 0\0\x16\ >>> \0\0\0\xf3\x02\0\0\x17\0\0\0\x06\x03\0\0\x18\0\0\0\x1e\x03\0\0\x19\0\0\= 0\x37\ >>> \x03\0\0\x1a\0\0\0\x4f\x03\0\0\x1b\0\0\0\x64\x03\0\0\x1c\0\0\0\x7f\x03\= 0\0\x1d\ >>> \0\0\0\x99\x03\0\0\x1e\0\0\0\0\0\0\0\x01\0\0\x05\x08\0\0\0\xb3\x03\0\0\= x1d\0\0\ >>> \0\0\0\0\0\xbd\x03\0\0\x0d\0\0\x04\x38\0\0\0\xcb\x03\0\0\x08\0\0\0\0\0\= 0\0\xd1\ >>> \x03\0\0\x08\0\0\0\x10\0\0\0\xd7\x03\0\0\x08\0\0\0\x20\0\0\0\xe2\x03\0\= 0\x03\0\ >>> \0\0\x30\0\0\0\xea\x03\0\0\x03\0\0\0\x38\0\0\0\xf8\x03\0\0\x03\0\0\0\x4= 0\0\0\0\ >>> \x01\x04\0\0\x03\0\0\0\x48\0\0\0\x0a\x04\0\0\x14\0\0\0\x50\0\0\0\x12\x0= 4\0\0\ >>> \x14\0\0\0\x60\0\0\0\x18\x04\0\0\x14\0\0\0\x70\0\0\0\0\0\0\0\x19\0\0\0\= x80\0\0\ >>> \0\x1e\x04\0\0\x0c\0\0\0\x80\x01\0\0\x24\x04\0\0\x15\0\0\0\xa0\x01\0\0\= 0\0\0\0\ >>> \x02\0\0\x05\x20\0\0\0\0\0\0\0\x1a\0\0\0\0\0\0\0\0\0\0\0\x1b\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\x02\0\0\x04\x08\0\0\0\x2f\x04\0\0\x15\0\0\0\0\0\0\0\x38\x04\0\0\x1= 5\0\0\0\ >>> \x20\0\0\0\0\0\0\0\x02\0\0\x04\x20\0\0\0\x41\x04\0\0\x1c\0\0\0\0\0\0\0\= x4a\x04\ >>> \0\0\x1c\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x0c\0\0\0\x10\0\0\0\= x04\0\0\ >>> \0\0\0\0\0\0\0\0\x02\x18\0\0\0\0\0\0\0\x01\0\0\x05\x08\0\0\0\x53\x04\0\= 0\x20\0\ >>> \0\0\0\0\0\0\x56\x04\0\0\x0e\0\0\x04\x50\0\0\0\x5f\x04\0\0\x0c\0\0\0\0\= 0\0\0\ >>> \x6c\x04\0\0\x0c\0\0\0\x20\0\0\0\x73\x04\0\0\x0c\0\0\0\x40\0\0\0\x78\x0= 4\0\0\ >>> \x0c\0\0\0\x60\0\0\0\x81\x04\0\0\x0c\0\0\0\x80\0\0\0\x86\x04\0\0\x0c\0\= 0\0\xa0\ >>> \0\0\0\x8f\x04\0\0\x0c\0\0\0\xc0\0\0\0\x97\x04\0\0\x1c\0\0\0\xe0\0\0\0\= x9f\x04\ >>> \0\0\x0c\0\0\0\x60\x01\0\0\xa8\x04\0\0\x14\0\0\0\x80\x01\0\0\xb1\x04\0\= 0\x0c\0\ >>> \0\0\xa0\x01\0\0\xb9\x04\0\0\x1c\0\0\0\xc0\x01\0\0\xc1\x04\0\0\x0c\0\0\= 0\x40\ >>> \x02\0\0\xc7\x04\0\0\x0a\0\0\0\x60\x02\0\0\0\0\0\0\0\0\0\x02\x1f\0\0\0\= xd8\x04\ >>> \0\0\x21\0\0\x04\xc0\0\0\0\xe2\x04\0\0\x0c\0\0\0\0\0\0\0\xe6\x04\0\0\x0= c\0\0\0\ >>> \x20\0\0\0\x81\x04\0\0\x0c\0\0\0\x40\0\0\0\xef\x04\0\0\x0c\0\0\0\x60\0\= 0\0\x78\ >>> \x04\0\0\x0c\0\0\0\x80\0\0\0\xfd\x04\0\0\x0c\0\0\0\xa0\0\0\0\x0a\x05\0\= 0\x0c\0\ >>> \0\0\xc0\0\0\0\x13\x05\0\0\x0c\0\0\0\xe0\0\0\0\x86\x04\0\0\x0c\0\0\0\0\= x01\0\0\ >>> \x1e\x05\0\0\x0c\0\0\0\x20\x01\0\0\x2e\x05\0\0\x0c\0\0\0\x40\x01\0\0\x3= 6\x05\0\ >>> \0\x0c\0\0\0\x60\x01\0\0\x3f\x05\0\0\x22\0\0\0\x80\x01\0\0\x42\x05\0\0\= x0c\0\0\ >>> \0\x20\x02\0\0\x47\x05\0\0\x0c\0\0\0\x40\x02\0\0\x52\x05\0\0\x0c\0\0\0\= x60\x02\ >>> \0\0\x57\x05\0\0\x0c\0\0\0\x80\x02\0\0\x60\x05\0\0\x0c\0\0\0\xa0\x02\0\= 0\x6c\ >>> \x04\0\0\x0c\0\0\0\xc0\x02\0\0\x68\x05\0\0\x0c\0\0\0\xe0\x02\0\0\x73\x0= 5\0\0\ >>> \x0c\0\0\0\0\x03\0\0\x7d\x05\0\0\x1c\0\0\0\x20\x03\0\0\x88\x05\0\0\x1c\= 0\0\0\ >>> \xa0\x03\0\0\x92\x05\0\0\x0c\0\0\0\x20\x04\0\0\x9e\x05\0\0\x0c\0\0\0\x4= 0\x04\0\ >>> \0\xa9\x05\0\0\x0c\0\0\0\x60\x04\0\0\0\0\0\0\x17\0\0\0\x80\x04\0\0\xb3\= x05\0\0\ >>> \x0f\0\0\0\xc0\x04\0\0\xba\x05\0\0\x0c\0\0\0\0\x05\0\0\xc3\x05\0\0\x0c\= 0\0\0\ >>> \x20\x05\0\0\0\0\0\0\x1e\0\0\0\x40\x05\0\0\xcc\x05\0\0\x0c\0\0\0\x80\x0= 5\0\0\ >>> \xd5\x05\0\0\x0f\0\0\0\xc0\x05\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x0c\0\0\0\= x10\0\0\ >>> \0\x05\0\0\0\0\0\0\0\0\0\0\x0a\x21\0\0\0\0\0\0\0\0\0\0\x02\0\0\0\0\0\0\= 0\0\x03\ >>> \0\0\x04\x18\0\0\0\x73\x04\0\0\x27\0\0\0\0\0\0\0\xde\x05\0\0\x28\0\0\0\= x40\0\0\ >>> \0\xe2\x05\0\0\x29\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x09\0\0\0\= x10\0\0\ >>> \0\x01\0\0\0\0\0\0\0\0\0\0\x02\x26\0\0\0\0\0\0\0\0\0\0\x02\x0c\0\0\0\0\= 0\0\0\0\ >>> \0\0\x02\x03\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x13\0\0\0\x10\0\0\0\x12\0\= 0\0\0\0\ >>> \0\0\0\0\0\x0a\x2a\0\0\0\0\0\0\0\x02\0\0\x0d\x24\0\0\0\0\0\0\0\x24\0\0\= 0\0\0\0\ >>> \0\x2e\0\0\0\0\0\0\0\0\0\0\x0a\0\0\0\0\0\0\0\0\0\0\0\x02\x2d\0\0\0\0\0\= 0\0\x01\ >>> \0\0\x0d\x09\0\0\0\x53\x04\0\0\x30\0\0\0\0\0\0\0\0\0\0\x02\x23\0\0\0\xe= 8\x05\0\ >>> \0\0\0\0\x0e\x2b\0\0\0\0\0\0\0\xf1\x05\0\0\0\0\0\x0e\x05\0\0\0\x01\0\0\= 0\xff\ >>> \x05\0\0\0\0\0\x0e\x25\0\0\0\x01\0\0\0\x0d\x06\0\0\x01\0\0\x0c\x2f\0\0\= 0\x1d\ >>> \x06\0\0\x01\0\0\x0c\x2f\0\0\0\x2d\x06\0\0\0\0\0\x0c\x2f\0\0\0\x4e\x06\= 0\0\x01\ >>> \0\0\x0f\x01\0\0\0\x32\0\0\0\0\0\0\0\x01\0\0\0\x54\x06\0\0\x01\0\0\x0f\= x12\0\0\ >>> \0\x31\0\0\0\0\0\0\0\x12\0\0\0\x5c\x06\0\0\x01\0\0\x0f\x18\0\0\0\x33\0\= 0\0\0\0\ >>> \0\0\x18\0\0\0\0\x73\x69\x67\x6e\x65\x64\x20\x63\x68\x61\x72\0\x75\x6e\= x73\x69\ >>> \x67\x6e\x65\x64\x20\x63\x68\x61\x72\0\x5f\x5f\x75\x38\0\x73\x68\x6f\x7= 2\x74\ >>> \x20\x69\x6e\x74\0\x73\x68\x6f\x72\x74\x20\x75\x6e\x73\x69\x67\x6e\x65\= x64\x20\ >>> \x69\x6e\x74\0\x5f\x5f\x75\x31\x36\0\x69\x6e\x74\0\x5f\x5f\x73\x33\x32\= 0\x75\ >>> \x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x33\x32\0\x6= c\x6f\ >>> \x6e\x67\x20\x6c\x6f\x6e\x67\x20\x69\x6e\x74\0\x6c\x6f\x6e\x67\x20\x6c\= x6f\x6e\ >>> \x67\x20\x75\x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\= x36\x34\ >>> \0\x6c\x6f\x6e\x67\x20\x75\x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\= 0\x6c\ >>> \x6f\x6e\x67\x20\x69\x6e\x74\0\x63\x68\x61\x72\0\x5f\x5f\x62\x65\x31\x3= 6\0\x5f\ >>> \x5f\x62\x65\x33\x32\0\x62\x70\x66\x5f\x6d\x61\x70\x5f\x74\x79\x70\x65\= 0\x42\ >>> \x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x55\x4e\x53\x50\x45\x4= 3\0\x42\ >>> \x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x48\x41\x53\x48\0\x42\= x50\x46\ >>> \x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x41\x52\x52\x41\x59\0\x42\x50\= x46\x5f\ >>> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x52\x4f\x47\x5f\x41\x52\x52\x4= 1\x59\0\ >>> \x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x45\x52\x46\x5= f\x45\ >>> \x56\x45\x4e\x54\x5f\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\= x5f\x54\ >>> \x59\x50\x45\x5f\x50\x45\x52\x43\x50\x55\x5f\x48\x41\x53\x48\0\x42\x50\= x46\x5f\ >>> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x45\x52\x43\x50\x55\x5f\x41\x5= 2\x52\ >>> \x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x54\= x41\x43\ >>> \x4b\x5f\x54\x52\x41\x43\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\= x50\x45\ >>> \x5f\x43\x47\x52\x4f\x55\x50\x5f\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\= x4d\x41\ >>> \x50\x5f\x54\x59\x50\x45\x5f\x4c\x52\x55\x5f\x48\x41\x53\x48\0\x42\x50\= x46\x5f\ >>> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x4c\x52\x55\x5f\x50\x45\x52\x43\x5= 0\x55\ >>> \x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\= x5f\x4c\ >>> \x50\x4d\x5f\x54\x52\x49\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\= x50\x45\ >>> \x5f\x41\x52\x52\x41\x59\x5f\x4f\x46\x5f\x4d\x41\x50\x53\0\x42\x50\x46\= x5f\x4d\ >>> \x41\x50\x5f\x54\x59\x50\x45\x5f\x48\x41\x53\x48\x5f\x4f\x46\x5f\x4d\x4= 1\x50\ >>> \x53\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x44\x45\x56\= x4d\x41\ >>> \x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4f\x43\= x4b\x4d\ >>> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x43\x50\= x55\x4d\ >>> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x58\x53\= x4b\x4d\ >>> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4f\= x43\x4b\ >>> \x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\= x43\x47\ >>> \x52\x4f\x55\x50\x5f\x53\x54\x4f\x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\= x41\x50\ >>> \x5f\x54\x59\x50\x45\x5f\x52\x45\x55\x53\x45\x50\x4f\x52\x54\x5f\x53\x4= f\x43\ >>> \x4b\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\= x45\x5f\ >>> \x50\x45\x52\x43\x50\x55\x5f\x43\x47\x52\x4f\x55\x50\x5f\x53\x54\x4f\x5= 2\x41\ >>> \x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x51\x55\= x45\x55\ >>> \x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x54\x41\= x43\x4b\ >>> \0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4b\x5f\x53\= x54\x4f\ >>> \x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\= x44\x45\ >>> \x56\x4d\x41\x50\x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\= x54\x59\ >>> \x50\x45\x5f\x53\x54\x52\x55\x43\x54\x5f\x4f\x50\x53\0\x42\x50\x46\x5f\= x4d\x41\ >>> \x50\x5f\x54\x59\x50\x45\x5f\x52\x49\x4e\x47\x42\x55\x46\0\x42\x50\x46\= x5f\x4d\ >>> \x41\x50\x5f\x54\x59\x50\x45\x5f\x49\x4e\x4f\x44\x45\x5f\x53\x54\x4f\x5= 2\x41\ >>> \x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x54\x41\= x53\x4b\ >>> \x5f\x53\x54\x4f\x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\= x59\x50\ >>> \x45\x5f\x42\x4c\x4f\x4f\x4d\x5f\x46\x49\x4c\x54\x45\x52\0\x66\x6c\x6f\= x77\x5f\ >>> \x6b\x65\x79\x73\0\x62\x70\x66\x5f\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\= 0\x6e\ >>> \x68\x6f\x66\x66\0\x74\x68\x6f\x66\x66\0\x61\x64\x64\x72\x5f\x70\x72\x6= f\x74\ >>> \x6f\0\x69\x73\x5f\x66\x72\x61\x67\0\x69\x73\x5f\x66\x69\x72\x73\x74\x5= f\x66\ >>> \x72\x61\x67\0\x69\x73\x5f\x65\x6e\x63\x61\x70\0\x69\x70\x5f\x70\x72\x6= f\x74\ >>> \x6f\0\x6e\x5f\x70\x72\x6f\x74\x6f\0\x73\x70\x6f\x72\x74\0\x64\x70\x6f\= x72\x74\ >>> \0\x66\x6c\x61\x67\x73\0\x66\x6c\x6f\x77\x5f\x6c\x61\x62\x65\x6c\0\x69\= x70\x76\ >>> \x34\x5f\x73\x72\x63\0\x69\x70\x76\x34\x5f\x64\x73\x74\0\x69\x70\x76\x3= 6\x5f\ >>> \x73\x72\x63\0\x69\x70\x76\x36\x5f\x64\x73\x74\0\x73\x6b\0\x62\x70\x66\= x5f\x73\ >>> \x6f\x63\x6b\0\x62\x6f\x75\x6e\x64\x5f\x64\x65\x76\x5f\x69\x66\0\x66\x6= 1\x6d\ >>> \x69\x6c\x79\0\x74\x79\x70\x65\0\x70\x72\x6f\x74\x6f\x63\x6f\x6c\0\x6d\= x61\x72\ >>> \x6b\0\x70\x72\x69\x6f\x72\x69\x74\x79\0\x73\x72\x63\x5f\x69\x70\x34\0\= x73\x72\ >>> \x63\x5f\x69\x70\x36\0\x73\x72\x63\x5f\x70\x6f\x72\x74\0\x64\x73\x74\x5= f\x70\ >>> \x6f\x72\x74\0\x64\x73\x74\x5f\x69\x70\x34\0\x64\x73\x74\x5f\x69\x70\x3= 6\0\x73\ >>> \x74\x61\x74\x65\0\x72\x78\x5f\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\= x69\x6e\ >>> \x67\0\x5f\x5f\x73\x6b\x5f\x62\x75\x66\x66\0\x6c\x65\x6e\0\x70\x6b\x74\= x5f\x74\ >>> \x79\x70\x65\0\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\x69\x6e\x67\0\x7= 6\x6c\ >>> \x61\x6e\x5f\x70\x72\x65\x73\x65\x6e\x74\0\x76\x6c\x61\x6e\x5f\x74\x63\= x69\0\ >>> \x76\x6c\x61\x6e\x5f\x70\x72\x6f\x74\x6f\0\x69\x6e\x67\x72\x65\x73\x73\= x5f\x69\ >>> \x66\x69\x6e\x64\x65\x78\0\x69\x66\x69\x6e\x64\x65\x78\0\x74\x63\x5f\x6= 9\x6e\ >>> \x64\x65\x78\0\x63\x62\0\x68\x61\x73\x68\0\x74\x63\x5f\x63\x6c\x61\x73\= x73\x69\ >>> \x64\0\x64\x61\x74\x61\0\x64\x61\x74\x61\x5f\x65\x6e\x64\0\x6e\x61\x70\= x69\x5f\ >>> \x69\x64\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x34\0\x6c\x6f\x63\x61\x6= c\x5f\ >>> \x69\x70\x34\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x36\0\x6c\x6f\x63\x6= 1\x6c\ >>> \x5f\x69\x70\x36\0\x72\x65\x6d\x6f\x74\x65\x5f\x70\x6f\x72\x74\0\x6c\x6= f\x63\ >>> \x61\x6c\x5f\x70\x6f\x72\x74\0\x64\x61\x74\x61\x5f\x6d\x65\x74\x61\0\x7= 4\x73\ >>> \x74\x61\x6d\x70\0\x77\x69\x72\x65\x5f\x6c\x65\x6e\0\x67\x73\x6f\x5f\x7= 3\x65\ >>> \x67\x73\0\x67\x73\x6f\x5f\x73\x69\x7a\x65\0\x68\x77\x74\x73\x74\x61\x6= d\x70\0\ >>> \x6b\x65\x79\0\x76\x61\x6c\x75\x65\0\x5f\x6c\x69\x63\x65\x6e\x73\x65\0\= x69\x73\ >>> \x5f\x61\x6c\x6c\x6f\x77\x5f\x6c\x69\x73\x74\0\x73\x64\x5f\x72\x65\x73\= x74\x72\ >>> \x69\x63\x74\x69\x66\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\= x66\x5f\ >>> \x69\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x7= 2\x65\ >>> \x73\x74\x72\x69\x63\x74\x5f\x6e\x65\x74\x77\x6f\x72\x6b\x5f\x69\x6e\x7= 4\x65\ >>> \x72\x66\x61\x63\x65\x73\x5f\x69\x6d\x70\x6c\0\x2e\x64\x61\x74\x61\0\x6= c\x69\ >>> \x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\x01\0\0\0\x03\0\0\0\x20\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\x40\ >>> \0\0\0\0\0\0\0\xe5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\x09\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x28\x01\0\0\0\= 0\0\0\ >>> \x50\x01\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\x18\0\0\0\0\0\= 0\0\x11\ >>> \0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x78\x02\0\0\0\0\0\0\= x01\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\0\= x08\0\0\ >>> \0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x79\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1c\0\0\0\x01\0\0\0\x06\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\x80\x02\0\0\0\0\0\0\xb8\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\x08\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x2e\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\x38\x03\0\0\0\0\0\0\xb8\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\x41\0\0\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= xf0\x03\ >>> \0\0\0\0\0\0\x12\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\x49\0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\x04\0\0\0\= 0\0\0\ >>> \x18\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x4= f\0\0\0\ >>> \x01\0\0\0\x30\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x20\x04\0\0\0\0\0\0\x31\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xb3\0\0\0\x09\= 0\0\0\ >>> \x40\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x58\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\= 0\x02\0\ >>> \0\0\x05\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xc9\0\0\0\x09\0\0\0\= x40\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\x78\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\= 0\0\x06\ >>> \0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xe0\0\0\0\x01\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\x98\x04\0\0\0\0\0\0\x16\x0e\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\x08\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0"; >>> } >>> >>> #ifdef __cplusplus >>> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open(const struct >>> bpf_object_open_opts *opts) { return >>> restrict_ifaces_bpf__open_opts(opts); } >>> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open_and_load() { >>> return restrict_ifaces_bpf__open_and_load(); } >>> int restrict_ifaces_bpf::load(struct restrict_ifaces_bpf *skel) { >>> return restrict_ifaces_bpf__load(skel); } >>> int restrict_ifaces_bpf::attach(struct restrict_ifaces_bpf *skel) { >>> return restrict_ifaces_bpf__attach(skel); } >>> void restrict_ifaces_bpf::detach(struct restrict_ifaces_bpf *skel) { >>> restrict_ifaces_bpf__detach(skel); } >>> void restrict_ifaces_bpf::destroy(struct restrict_ifaces_bpf *skel) { >>> restrict_ifaces_bpf__destroy(skel); } >>> const void *restrict_ifaces_bpf::elf_bytes(size_t *sz) { return >>> restrict_ifaces_bpf__elf_bytes(sz); } >>> #endif /* __cplusplus */ >>> >>> __attribute__((unused)) static void >>> restrict_ifaces_bpf__assert(struct restrict_ifaces_bpf *s >>> __attribute__((unused))) >>> { >>> #ifdef __cplusplus >>> #define _Static_assert static_assert >>> #endif >>> _Static_assert(sizeof(s->data->is_allow_list) =3D=3D 1, "unexpected >>> size of 'is_allow_list'"); >>> #ifdef __cplusplus >>> #undef _Static_assert >>> #endif >>> } >>> >>> #endif /* __RESTRICT_IFACES_BPF_SKEL_H__ */ >>> >>> Clang: >>> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftoo= l >>> --debug gen skeleton restrict-ifaces.bpf.o >>> libbpf: loading object 'restrict_ifaces_bpf' from buffer >>> libbpf: elf: section(2) .symtab, size 384, link 1, flags 0, type=3D2 >>> libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flags 6, t= ype=3D1 >>> libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at >>> insn offset 0 (0 bytes), code size 19 insns (152 bytes) >>> libbpf: elf: section(4) cgroup_skb/ingress, size 152, link 0, flags 6, = type=3D1 >>> libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at >>> insn offset 0 (0 bytes), code size 19 insns (152 bytes) >>> libbpf: elf: section(5) .rodata, size 1, link 0, flags 2, type=3D1 >>> libbpf: elf: section(6) license, size 18, link 0, flags 2, type=3D1 >>> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>> libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=3D1 >>> libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, flags 4= 0, type=3D9 >>> libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, flags >>> 40, type=3D9 >>> libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type=3D1 >>> libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, type=3D1 >>> libbpf: looking for externs among 16 symbols... >>> libbpf: collected 0 externs total >>> libbpf: map 'sd_restrictif': at sec_idx 7, offset 0. >>> libbpf: map 'sd_restrictif': found type =3D 1. >>> libbpf: map 'sd_restrictif': found key [6], sz =3D 4. >>> libbpf: map 'sd_restrictif': found value [9], sz =3D 1. >>> libbpf: map 'restrict.rodata' (global data): at sec_idx 5, offset 0, fl= ags 480. >>> libbpf: map 1 is "restrict.rodata" >>> libbpf: sec '.relcgroup_skb/egress': collecting relocation for >>> section(3) 'cgroup_skb/egress' >>> libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd_restr= ictif' >>> libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 7, off >>> 0) for insn #4 >>> libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is_allow= _list' >>> libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.rodata, sec >>> 5, off 0) for insn 7 >>> libbpf: sec '.relcgroup_skb/ingress': collecting relocation for >>> section(4) 'cgroup_skb/ingress' >>> libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 'sd_rest= rictif' >>> libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 7, off >>> 0) for insn #4 >>> libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'is_allo= w_list' >>> libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.rodata, sec >>> 5, off 0) for insn 7 >>> /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ >>> >>> /* THIS FILE IS AUTOGENERATED BY BPFTOOL! */ >>> #ifndef __RESTRICT_IFACES_BPF_SKEL_H__ >>> #define __RESTRICT_IFACES_BPF_SKEL_H__ >>> >>> #include >>> #include >>> #include >>> >>> struct restrict_ifaces_bpf { >>> struct bpf_object_skeleton *skeleton; >>> struct bpf_object *obj; >>> struct { >>> struct bpf_map *sd_restrictif; >>> struct bpf_map *rodata; >>> } maps; >>> struct { >>> struct bpf_program *sd_restrictif_e; >>> struct bpf_program *sd_restrictif_i; >>> } progs; >>> struct { >>> struct bpf_link *sd_restrictif_e; >>> struct bpf_link *sd_restrictif_i; >>> } links; >>> struct restrict_ifaces_bpf__rodata { >>> __u8 is_allow_list; >>> } *rodata; >>> >>> #ifdef __cplusplus >>> static inline struct restrict_ifaces_bpf *open(const struct >>> bpf_object_open_opts *opts =3D nullptr); >>> static inline struct restrict_ifaces_bpf *open_and_load(); >>> static inline int load(struct restrict_ifaces_bpf *skel); >>> static inline int attach(struct restrict_ifaces_bpf *skel); >>> static inline void detach(struct restrict_ifaces_bpf *skel); >>> static inline void destroy(struct restrict_ifaces_bpf *skel); >>> static inline const void *elf_bytes(size_t *sz); >>> #endif /* __cplusplus */ >>> }; >>> >>> static void >>> restrict_ifaces_bpf__destroy(struct restrict_ifaces_bpf *obj) >>> { >>> if (!obj) >>> return; >>> if (obj->skeleton) >>> bpf_object__destroy_skeleton(obj->skeleton); >>> free(obj); >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj); >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open_opts(const struct bpf_object_open_opts *opts) >>> { >>> struct restrict_ifaces_bpf *obj; >>> int err; >>> >>> obj =3D (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj)); >>> if (!obj) { >>> errno =3D ENOMEM; >>> return NULL; >>> } >>> >>> err =3D restrict_ifaces_bpf__create_skeleton(obj); >>> if (err) >>> goto err_out; >>> >>> err =3D bpf_object__open_skeleton(obj->skeleton, opts); >>> if (err) >>> goto err_out; >>> >>> return obj; >>> err_out: >>> restrict_ifaces_bpf__destroy(obj); >>> errno =3D -err; >>> return NULL; >>> } >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open(void) >>> { >>> return restrict_ifaces_bpf__open_opts(NULL); >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__load(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__load_skeleton(obj->skeleton); >>> } >>> >>> static inline struct restrict_ifaces_bpf * >>> restrict_ifaces_bpf__open_and_load(void) >>> { >>> struct restrict_ifaces_bpf *obj; >>> int err; >>> >>> obj =3D restrict_ifaces_bpf__open(); >>> if (!obj) >>> return NULL; >>> err =3D restrict_ifaces_bpf__load(obj); >>> if (err) { >>> restrict_ifaces_bpf__destroy(obj); >>> errno =3D -err; >>> return NULL; >>> } >>> return obj; >>> } >>> >>> static inline int >>> restrict_ifaces_bpf__attach(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__attach_skeleton(obj->skeleton); >>> } >>> >>> static inline void >>> restrict_ifaces_bpf__detach(struct restrict_ifaces_bpf *obj) >>> { >>> return bpf_object__detach_skeleton(obj->skeleton); >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz); >>> >>> static inline int >>> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj) >>> { >>> struct bpf_object_skeleton *s; >>> int err; >>> >>> s =3D (struct bpf_object_skeleton *)calloc(1, sizeof(*s)); >>> if (!s) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->sz =3D sizeof(*s); >>> s->name =3D "restrict_ifaces_bpf"; >>> s->obj =3D &obj->obj; >>> >>> /* maps */ >>> s->map_cnt =3D 2; >>> s->map_skel_sz =3D sizeof(*s->maps); >>> s->maps =3D (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_sk= el_sz); >>> if (!s->maps) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->maps[0].name =3D "sd_restrictif"; >>> s->maps[0].map =3D &obj->maps.sd_restrictif; >>> >>> s->maps[1].name =3D "restrict.rodata"; >>> s->maps[1].map =3D &obj->maps.rodata; >>> s->maps[1].mmaped =3D (void **)&obj->rodata; >>> >>> /* programs */ >>> s->prog_cnt =3D 2; >>> s->prog_skel_sz =3D sizeof(*s->progs); >>> s->progs =3D (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->pro= g_skel_sz); >>> if (!s->progs) { >>> err =3D -ENOMEM; >>> goto err; >>> } >>> >>> s->progs[0].name =3D "sd_restrictif_e"; >>> s->progs[0].prog =3D &obj->progs.sd_restrictif_e; >>> s->progs[0].link =3D &obj->links.sd_restrictif_e; >>> >>> s->progs[1].name =3D "sd_restrictif_i"; >>> s->progs[1].prog =3D &obj->progs.sd_restrictif_i; >>> s->progs[1].link =3D &obj->links.sd_restrictif_i; >>> >>> s->data =3D (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz); >>> >>> obj->skeleton =3D s; >>> return 0; >>> err: >>> bpf_object__destroy_skeleton(s); >>> return err; >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz) >>> { >>> *sz =3D 4272; >>> return (const void *)"\ >>> \x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\xb0\x0d\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\= x0c\0\ >>> \x01\0\0\x2e\x73\x74\x72\x74\x61\x62\0\x2e\x73\x79\x6d\x74\x61\x62\0\x6= 3\x67\ >>> \x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x65\x67\x72\x65\x73\x73\0\x63\x67\= x72\x6f\ >>> \x75\x70\x5f\x73\x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\x2e\x72\x6f\= x64\x61\ >>> \x74\x61\0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\x72\x65\= x73\x74\ >>> \x72\x69\x63\x74\x2d\x69\x66\x61\x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\= x4c\x42\ >>> \x42\x30\x5f\x32\0\x4c\x42\x42\x30\x5f\x33\0\x4c\x42\x42\x30\x5f\x34\0\= x4c\x42\ >>> \x42\x31\x5f\x32\0\x4c\x42\x42\x31\x5f\x33\0\x4c\x42\x42\x31\x5f\x34\0\= x5f\x6c\ >>> \x69\x63\x65\x6e\x73\x65\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\= x69\x66\ >>> \x5f\x65\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\0\x69\x7= 3\x5f\ >>> \x61\x6c\x6c\x6f\x77\x5f\x6c\x69\x73\x74\0\x73\x64\x5f\x72\x65\x73\x74\= x72\x69\ >>> \x63\x74\x69\x66\x5f\x69\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\= x73\x6b\ >>> \x62\x2f\x65\x67\x72\x65\x73\x73\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\= x70\x5f\ >>> \x73\x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\x2e\x42\x54\x46\0\x2e\x4= 2\x54\ >>> \x46\x2e\x65\x78\x74\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \x4c\0\0\0\x04\0\xf1\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\= x03\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x62\0\0\0\0\0\x03\0\x70\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\x69\0\0\0\0\0\x03\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x70\0\0\0\= 0\0\x03\ >>> \0\x88\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x04\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x77\0\0\0\0\0\x04\0\x70\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x7e\0\= 0\0\0\0\ >>> \x04\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x85\0\0\0\0\0\x04\0\x88\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\x8c\0\0\0\x01\0\x06\0\0\0\0\0\0\0\0\0\x12\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\x03\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x95\0\0\0\x12\0\x03\0\0\= 0\0\0\0\ >>> \0\0\0\x98\0\0\0\0\0\0\0\xa5\0\0\0\x11\0\x07\0\0\0\0\0\0\0\0\0\x18\0\0\= 0\0\0\0\ >>> \0\xb3\0\0\0\x11\0\x05\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xc1\0\0\0\x1= 2\0\x04\ >>> \0\0\0\0\0\0\0\0\0\x98\0\0\0\0\0\0\0\x61\x11\x28\0\0\0\0\0\x63\x1a\xfc\= xff\0\0\ >>> \0\0\xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\= x11\0\0\ >>> \0\0\0\0\x15\x01\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x03\0\0\0\0\= 0\x05\0\ >>> \x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xb7\x01\0\0\0\= 0\0\0\ >>> \xbf\x10\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\x61\x11\x28\0\0\0\0\0\x63\x1a\xf= c\xff\0\ >>> \0\0\0\xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x7= 1\x11\0\ >>> \0\0\0\0\0\x15\x01\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x03\0\0\0\= 0\0\x05\ >>> \0\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xb7\x01\0\0\= 0\0\0\0\ >>> \xbf\x10\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\0\x4c\x47\x50\x4c\x2d\x32\x2e\x3= 1\x2d\ >>> \x6f\x72\x2d\x6c\x61\x74\x65\x72\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x01\0\0\0\x0d\0\0\0\x38\0\0\0\0\0\0\0\= x01\0\0\ >>> \0\x0e\0\0\0\x20\0\0\0\0\0\0\0\x01\0\0\0\x0d\0\0\0\x38\0\0\0\0\0\0\0\x0= 1\0\0\0\ >>> \x0e\0\0\0\x9f\xeb\x01\0\x18\0\0\0\0\0\0\0\x10\x04\0\0\x10\x04\0\0\x9c\= x03\0\0\ >>> \0\0\0\0\0\0\0\x02\x03\0\0\0\x01\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\x01\= 0\0\0\0\ >>> \0\0\0\x03\0\0\0\0\x02\0\0\0\x04\0\0\0\x01\0\0\0\x05\0\0\0\0\0\0\x01\x0= 4\0\0\0\ >>> \x20\0\0\0\0\0\0\0\0\0\0\x02\x06\0\0\0\x19\0\0\0\0\0\0\x08\x07\0\0\0\x1= f\0\0\0\ >>> \0\0\0\x01\x04\0\0\0\x20\0\0\0\0\0\0\0\0\0\0\x02\x09\0\0\0\x2c\0\0\0\0\= 0\0\x08\ >>> \x0a\0\0\0\x31\0\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\0\0\0\0\0\x03\0\0\x04\= x18\0\0\ >>> \0\x3f\0\0\0\x01\0\0\0\0\0\0\0\x44\0\0\0\x05\0\0\0\x40\0\0\0\x48\0\0\0\= x08\0\0\ >>> \0\x80\0\0\0\x4e\0\0\0\0\0\0\x0e\x0b\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\x02\= x0e\0\0\ >>> \0\0\0\0\0\0\0\0\x0a\x0f\0\0\0\x5c\0\0\0\x21\0\0\x04\xc0\0\0\0\x66\0\0\= 0\x06\0\ >>> \0\0\0\0\0\0\x6a\0\0\0\x06\0\0\0\x20\0\0\0\x73\0\0\0\x06\0\0\0\x40\0\0\= 0\x78\0\ >>> \0\0\x06\0\0\0\x60\0\0\0\x86\0\0\0\x06\0\0\0\x80\0\0\0\x8f\0\0\0\x06\0\= 0\0\xa0\ >>> \0\0\0\x9c\0\0\0\x06\0\0\0\xc0\0\0\0\xa5\0\0\0\x06\0\0\0\xe0\0\0\0\xb0\= 0\0\0\ >>> \x06\0\0\0\0\x01\0\0\xb9\0\0\0\x06\0\0\0\x20\x01\0\0\xc9\0\0\0\x06\0\0\= 0\x40\ >>> \x01\0\0\xd1\0\0\0\x06\0\0\0\x60\x01\0\0\xda\0\0\0\x10\0\0\0\x80\x01\0\= 0\xdd\0\ >>> \0\0\x06\0\0\0\x20\x02\0\0\xe2\0\0\0\x06\0\0\0\x40\x02\0\0\xed\0\0\0\x0= 6\0\0\0\ >>> \x60\x02\0\0\xf2\0\0\0\x06\0\0\0\x80\x02\0\0\xfb\0\0\0\x06\0\0\0\xa0\x0= 2\0\0\ >>> \x03\x01\0\0\x06\0\0\0\xc0\x02\0\0\x0a\x01\0\0\x06\0\0\0\xe0\x02\0\0\x1= 5\x01\0\ >>> \0\x06\0\0\0\0\x03\0\0\x1f\x01\0\0\x11\0\0\0\x20\x03\0\0\x2a\x01\0\0\x1= 1\0\0\0\ >>> \xa0\x03\0\0\x34\x01\0\0\x06\0\0\0\x20\x04\0\0\x40\x01\0\0\x06\0\0\0\x4= 0\x04\0\ >>> \0\x4b\x01\0\0\x06\0\0\0\x60\x04\0\0\0\0\0\0\x12\0\0\0\x80\x04\0\0\x55\= x01\0\0\ >>> \x14\0\0\0\xc0\x04\0\0\x5c\x01\0\0\x06\0\0\0\0\x05\0\0\x65\x01\0\0\x06\= 0\0\0\ >>> \x20\x05\0\0\0\0\0\0\x16\0\0\0\x40\x05\0\0\x6e\x01\0\0\x06\0\0\0\x80\x0= 5\0\0\ >>> \x77\x01\0\0\x14\0\0\0\xc0\x05\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x06\0\0\0\= x04\0\0\ >>> \0\x05\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x06\0\0\0\x04\0\0\0\x04\0\0\0\0\= 0\0\0\ >>> \x01\0\0\x05\x08\0\0\0\x80\x01\0\0\x13\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x02\= x22\0\0\ >>> \0\x8a\x01\0\0\0\0\0\x08\x15\0\0\0\x90\x01\0\0\0\0\0\x01\x08\0\0\0\x40\= 0\0\0\0\ >>> \0\0\0\x01\0\0\x05\x08\0\0\0\xa3\x01\0\0\x17\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\x02\ >>> \x23\0\0\0\0\0\0\0\x01\0\0\x0d\x02\0\0\0\xa3\x01\0\0\x0d\0\0\0\xa6\x01\= 0\0\x01\ >>> \0\0\x0c\x18\0\0\0\xb6\x01\0\0\x01\0\0\x0c\x18\0\0\0\0\0\0\0\0\0\0\x0a\= x1c\0\0\ >>> \0\0\0\0\0\0\0\0\x09\x09\0\0\0\xc6\x01\0\0\0\0\0\x0e\x1b\0\0\0\x01\0\0\= 0\0\0\0\ >>> \0\0\0\0\x0a\x1f\0\0\0\xd4\x01\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\x01\0\0\= 0\0\0\0\ >>> \0\x03\0\0\0\0\x1e\0\0\0\x04\0\0\0\x12\0\0\0\xd9\x01\0\0\0\0\0\x0e\x20\= 0\0\0\0\ >>> \0\0\0\xe2\x01\0\0\0\0\0\x07\0\0\0\0\xf0\x01\0\0\0\0\0\x07\0\0\0\0\x61\= x03\0\0\ >>> \x01\0\0\x0f\x01\0\0\0\x1d\0\0\0\0\0\0\0\x01\0\0\0\x69\x03\0\0\x01\0\0\= x0f\x12\ >>> \0\0\0\x21\0\0\0\0\0\0\0\x12\0\0\0\x71\x03\0\0\x01\0\0\x0f\x18\0\0\0\x0= c\0\0\0\ >>> \0\0\0\0\x18\0\0\0\0\x69\x6e\x74\0\x5f\x5f\x41\x52\x52\x41\x59\x5f\x53\= x49\x5a\ >>> \x45\x5f\x54\x59\x50\x45\x5f\x5f\0\x5f\x5f\x75\x33\x32\0\x75\x6e\x73\x6= 9\x67\ >>> \x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x38\0\x75\x6e\x73\x69\x67\x6= e\x65\ >>> \x64\x20\x63\x68\x61\x72\0\x74\x79\x70\x65\0\x6b\x65\x79\0\x76\x61\x6c\= x75\x65\ >>> \0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\0\x5f\x5f\x73\x6= b\x5f\ >>> \x62\x75\x66\x66\0\x6c\x65\x6e\0\x70\x6b\x74\x5f\x74\x79\x70\x65\0\x6d\= x61\x72\ >>> \x6b\0\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\x69\x6e\x67\0\x70\x72\x6= f\x74\ >>> \x6f\x63\x6f\x6c\0\x76\x6c\x61\x6e\x5f\x70\x72\x65\x73\x65\x6e\x74\0\x7= 6\x6c\ >>> \x61\x6e\x5f\x74\x63\x69\0\x76\x6c\x61\x6e\x5f\x70\x72\x6f\x74\x6f\0\x7= 0\x72\ >>> \x69\x6f\x72\x69\x74\x79\0\x69\x6e\x67\x72\x65\x73\x73\x5f\x69\x66\x69\= x6e\x64\ >>> \x65\x78\0\x69\x66\x69\x6e\x64\x65\x78\0\x74\x63\x5f\x69\x6e\x64\x65\x7= 8\0\x63\ >>> \x62\0\x68\x61\x73\x68\0\x74\x63\x5f\x63\x6c\x61\x73\x73\x69\x64\0\x64\= x61\x74\ >>> \x61\0\x64\x61\x74\x61\x5f\x65\x6e\x64\0\x6e\x61\x70\x69\x5f\x69\x64\0\= x66\x61\ >>> \x6d\x69\x6c\x79\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x34\0\x6c\x6f\x6= 3\x61\ >>> \x6c\x5f\x69\x70\x34\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x36\0\x6c\x6= f\x63\ >>> \x61\x6c\x5f\x69\x70\x36\0\x72\x65\x6d\x6f\x74\x65\x5f\x70\x6f\x72\x74\= 0\x6c\ >>> \x6f\x63\x61\x6c\x5f\x70\x6f\x72\x74\0\x64\x61\x74\x61\x5f\x6d\x65\x74\= x61\0\ >>> \x74\x73\x74\x61\x6d\x70\0\x77\x69\x72\x65\x5f\x6c\x65\x6e\0\x67\x73\x6= f\x5f\ >>> \x73\x65\x67\x73\0\x67\x73\x6f\x5f\x73\x69\x7a\x65\0\x68\x77\x74\x73\x7= 4\x61\ >>> \x6d\x70\0\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\0\x5f\x5f\x75\x36\x34\0\= x75\x6e\ >>> \x73\x69\x67\x6e\x65\x64\x20\x6c\x6f\x6e\x67\x20\x6c\x6f\x6e\x67\0\x73\= x6b\0\ >>> \x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x73\x64\= x5f\x72\ >>> \x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x69\0\x69\x73\x5f\x61\x6c\x6c\= x6f\x77\ >>> \x5f\x6c\x69\x73\x74\0\x63\x68\x61\x72\0\x5f\x6c\x69\x63\x65\x6e\x73\x6= 5\0\x62\ >>> \x70\x66\x5f\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\0\x62\x70\x66\x5f\x73\= x6f\x63\ >>> \x6b\0\x2f\x68\x6f\x6d\x65\x2f\x62\x75\x69\x6c\x64\x72\x6f\x6f\x74\x2f\= x62\x75\ >>> \x69\x6c\x64\x72\x6f\x6f\x74\x2f\x6f\x75\x74\x70\x75\x74\x2f\x62\x75\x6= 9\x6c\ >>> \x64\x2f\x73\x79\x73\x74\x65\x6d\x64\x2d\x63\x75\x73\x74\x6f\x6d\x2f\x7= 3\x72\ >>> \x63\x2f\x63\x6f\x72\x65\x2f\x62\x70\x66\x2f\x72\x65\x73\x74\x72\x69\x6= 3\x74\ >>> \x5f\x69\x66\x61\x63\x65\x73\x2f\x72\x65\x73\x74\x72\x69\x63\x74\x2d\x6= 9\x66\ >>> \x61\x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\x20\x20\x20\x20\x20\x20\x20\= x20\x69\ >>> \x66\x69\x6e\x64\x65\x78\x20\x3d\x20\x73\x6b\x2d\x3e\x69\x66\x69\x6e\x6= 4\x65\ >>> \x78\x3b\0\x20\x20\x20\x20\x20\x20\x20\x20\x6c\x6f\x6f\x6b\x75\x70\x5f\= x72\x65\ >>> \x73\x75\x6c\x74\x20\x3d\x20\x62\x70\x66\x5f\x6d\x61\x70\x5f\x6c\x6f\x6= f\x6b\ >>> \x75\x70\x5f\x65\x6c\x65\x6d\x28\x26\x73\x64\x5f\x72\x65\x73\x74\x72\x6= 9\x63\ >>> \x74\x69\x66\x2c\x20\x26\x69\x66\x69\x6e\x64\x65\x78\x29\x3b\0\x20\x20\= x20\x20\ >>> \x20\x20\x20\x20\x69\x66\x20\x28\x69\x73\x5f\x61\x6c\x6c\x6f\x77\x5f\x6= c\x69\ >>> \x73\x74\x29\x20\x7b\0\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\= x20\x20\ >>> \x20\x20\x69\x66\x20\x28\x6c\x6f\x6f\x6b\x75\x70\x5f\x72\x65\x73\x75\x6= c\x74\ >>> \x29\0\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\= x69\x66\ >>> \x20\x28\x21\x6c\x6f\x6f\x6b\x75\x70\x5f\x72\x65\x73\x75\x6c\x74\x29\0\= x20\x20\ >>> \x20\x20\x20\x20\x20\x20\x72\x65\x74\x75\x72\x6e\x20\x72\x65\x73\x74\x7= 2\x69\ >>> \x63\x74\x5f\x6e\x65\x74\x77\x6f\x72\x6b\x5f\x69\x6e\x74\x65\x72\x66\x6= 1\x63\ >>> \x65\x73\x5f\x69\x6d\x70\x6c\x28\x73\x6b\x29\x3b\0\x2e\x72\x6f\x64\x61\= x74\x61\ >>> \0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\x63\x67\x72\x6f\= x75\x70\ >>> \x5f\x73\x6b\x62\x2f\x65\x67\x72\x65\x73\x73\0\x63\x67\x72\x6f\x75\x70\= x5f\x73\ >>> \x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\0\0\0\0\x9f\xeb\x01\0\x20\0\= 0\0\0\0\ >>> \0\0\x24\0\0\0\x24\0\0\0\x34\x01\0\0\x58\x01\0\0\0\0\0\0\x08\0\0\0\x77\= x03\0\0\ >>> \x01\0\0\0\0\0\0\0\x19\0\0\0\x89\x03\0\0\x01\0\0\0\0\0\0\0\x1a\0\0\0\x1= 0\0\0\0\ >>> \x77\x03\0\0\x09\0\0\0\0\0\0\0\xf9\x01\0\0\x62\x02\0\0\x17\x6c\0\0\x08\= 0\0\0\ >>> \xf9\x01\0\0\x62\x02\0\0\x11\x6c\0\0\x18\0\0\0\xf9\x01\0\0\0\0\0\0\0\0\= 0\0\x20\ >>> \0\0\0\xf9\x01\0\0\x81\x02\0\0\x19\x70\0\0\x38\0\0\0\xf9\x01\0\0\xc8\x0= 2\0\0\ >>> \x0d\x74\0\0\x50\0\0\0\xf9\x01\0\0\xc8\x02\0\0\x0d\x74\0\0\x60\0\0\0\xf= 9\x01\0\ >>> \0\xe5\x02\0\0\x15\x7c\0\0\x78\0\0\0\xf9\x01\0\0\x08\x03\0\0\x15\x8c\0\= 0\x88\0\ >>> \0\0\xf9\x01\0\0\x2c\x03\0\0\x09\xb0\0\0\x89\x03\0\0\x09\0\0\0\0\0\0\0\= xf9\x01\ >>> \0\0\x62\x02\0\0\x17\x6c\0\0\x08\0\0\0\xf9\x01\0\0\x62\x02\0\0\x11\x6c\= 0\0\x18\ >>> \0\0\0\xf9\x01\0\0\0\0\0\0\0\0\0\0\x20\0\0\0\xf9\x01\0\0\x81\x02\0\0\x1= 9\x70\0\ >>> \0\x38\0\0\0\xf9\x01\0\0\xc8\x02\0\0\x0d\x74\0\0\x50\0\0\0\xf9\x01\0\0\= xc8\x02\ >>> \0\0\x0d\x74\0\0\x60\0\0\0\xf9\x01\0\0\xe5\x02\0\0\x15\x7c\0\0\x78\0\0\= 0\xf9\ >>> \x01\0\0\x08\x03\0\0\x15\x8c\0\0\x88\0\0\0\xf9\x01\0\0\x2c\x03\0\0\x09\= xc4\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\x03\0\0\0\= x20\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\0\0\x0c\x01\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x09\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x50\x01\0\0\0\0\0\0\x80\x01\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x0= 8\0\0\0\ >>> \0\0\0\0\x18\0\0\0\0\0\0\0\x11\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\xd0\x02\0\0\0\0\0\0\x98\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\x23\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x68\= x03\0\0\ >>> \0\0\0\0\x98\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\ >>> \x36\0\0\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x04\0\0\0\0\0\= 0\x01\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x3e\0\0\= 0\x01\0\ >>> \0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\x04\0\0\0\0\0\0\x12\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x46\0\0\0\x01\0\0\0\x0= 3\0\0\0\ >>> \0\0\0\0\0\0\0\0\0\0\0\0\x18\x04\0\0\0\0\0\0\x18\0\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xd1\0\0\0\x09\0\0\0\x40\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\0\0\0\x30\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\0\0\x03\0\0\0\x0= 8\0\0\0\ >>> \0\0\0\0\x10\0\0\0\0\0\0\0\xe7\0\0\0\x09\0\0\0\x40\0\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\x50\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\0\0\x04\0\0\0\x08\0\0\0\= 0\0\0\0\ >>> \x10\0\0\0\0\0\0\0\xfe\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\= x70\x04\ >>> \0\0\0\0\0\0\xc4\x07\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\= 0\0\0\0\ >>> \0\0\x03\x01\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x38\x0c\0\0\= 0\0\0\0\ >>> \x78\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"= ; >>> } >>> >>> #ifdef __cplusplus >>> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open(const struct >>> bpf_object_open_opts *opts) { return >>> restrict_ifaces_bpf__open_opts(opts); } >>> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open_and_load() { >>> return restrict_ifaces_bpf__open_and_load(); } >>> int restrict_ifaces_bpf::load(struct restrict_ifaces_bpf *skel) { >>> return restrict_ifaces_bpf__load(skel); } >>> int restrict_ifaces_bpf::attach(struct restrict_ifaces_bpf *skel) { >>> return restrict_ifaces_bpf__attach(skel); } >>> void restrict_ifaces_bpf::detach(struct restrict_ifaces_bpf *skel) { >>> restrict_ifaces_bpf__detach(skel); } >>> void restrict_ifaces_bpf::destroy(struct restrict_ifaces_bpf *skel) { >>> restrict_ifaces_bpf__destroy(skel); } >>> const void *restrict_ifaces_bpf::elf_bytes(size_t *sz) { return >>> restrict_ifaces_bpf__elf_bytes(sz); } >>> #endif /* __cplusplus */ >>> >>> __attribute__((unused)) static void >>> restrict_ifaces_bpf__assert(struct restrict_ifaces_bpf *s >>> __attribute__((unused))) >>> { >>> #ifdef __cplusplus >>> #define _Static_assert static_assert >>> #endif >>> _Static_assert(sizeof(s->rodata->is_allow_list) =3D=3D 1, "unexpect= ed >>> size of 'is_allow_list'"); >>> #ifdef __cplusplus >>> #undef _Static_assert >>> #endif >>> } >>> >>> #endif /* __RESTRICT_IFACES_BPF_SKEL_H__ */ >>> >>>> >>>> >>>> > Starting program: >>>> > /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpfto= ol >>>> > --debug gen skeleton >>>> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restr= ict-ifaces.bpf.o >>>> > [Thread debugging using libthread_db enabled] >>>> > Using host libthread_db library "/usr/lib/libthread_db.so.1". >>>> > libbpf: loading object 'restrict_ifaces_bpf' from buffer >>>> > libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=3D2 >>>> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=3D1 >>>> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=3D8 >>>> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6= , type=3D1 >>>> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at >>>> > insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>>> > libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, flags = 6, type=3D1 >>>> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at >>>> > insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>>> > libbpf: elf: section(7) license, size 18, link 0, flags 2, type=3D1 >>>> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=3D1 >>>> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=3D= 1 >>>> > libbpf: elf: skipping unrecognized data section(9) .comment >>>> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, fla= gs >>>> > 40, type=3D9 >>>> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>>> > flags 40, type=3D9 >>>> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=3D1 >>>> > libbpf: looking for externs among 14 symbols... >>>> > libbpf: collected 0 externs total >>>> > libbpf: map 'sd_restrictif': at sec_idx 8, offset 0. >>>> > libbpf: map 'sd_restrictif': found type =3D 1. >>>> > libbpf: map 'sd_restrictif': found key [12], sz =3D 4. >>>> > libbpf: map 'sd_restrictif': found value [3], sz =3D 1. >>>> > >>>> > Program received signal SIGSEGV, Segmentation fault. >>>> > 0x0000aaaaaab4fd2c in bpf_object.init_maps () >>>> > (gdb) bt >>>> > #0 0x0000aaaaaab4fd2c in bpf_object.init_maps () >>>> > #1 0x0000aaaaaab52178 in bpf_object_open.part () >>>> > #2 0x0000aaaaaab544e8 in bpf_object.open_mem () >>>> > #3 0x0000aaaaaab2a58c in do_skeleton () >>>> > #4 0x0000aaaaaab1e204 in main () >>>> > >>>> >> >>>> >> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c >>>> >> index e89cc9c885b3..e3a6808f0bb6 100644 >>>> >> --- a/tools/lib/bpf/libbpf.c >>>> >> +++ b/tools/lib/bpf/libbpf.c >>>> >> @@ -1591,6 +1591,10 @@ static int >> bpf_object__init_global_data_maps(struct bpf_object *obj) >>>> >> for (sec_idx =3D 1; sec_idx < obj->efile.sec_cnt; sec_idx++= ) { >>>> >> sec_desc =3D &obj->efile.secs[sec_idx]; >>>> >> >>>> >> + /* Skip empty sections. */ >>>> >> + if (sec_desc->data->d_size =3D=3D 0) >>>> >> + continue; >>>> >> + >>>> >> switch (sec_desc->sec_type) { >>>> >> case SEC_DATA: >>>> >> sec_name =3D elf_sec_name(obj, elf_sec_by_i= dx(obj, sec_idx)); >>>> >> >>>> >> > GCC: >>>> >> > $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/= bpftool >>>> >> > --debug gen skeleton >>>> >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/re= strict-ifaces.bpf.o >>>> >> > libbpf: loading object 'restrict_ifaces_bpf' from buffer >>>> >> > libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type= =3D2 >>>> >> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=3D1 >>>> >> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=3D8 >>>> >> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flag= s 6, type=3D1 >>>> >> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' = at >>>> >> > insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>>> >> > libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, fla= gs 6, type=3D1 >>>> >> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i'= at >>>> >> > insn offset 0 (0 bytes), code size 23 insns (184 bytes) >>>> >> > libbpf: elf: section(7) license, size 18, link 0, flags 2, type= =3D1 >>>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> >> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=3D1 >>>> >> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type= =3D1 >>>> >> > libbpf: elf: skipping unrecognized data section(9) .comment >>>> >> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, = flags >>>> >> > 40, type=3D9 >>>> >> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>>> >> > flags 40, type=3D9 >>>> >> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type= =3D1 >>>> >> > libbpf: looking for externs among 14 symbols... >>>> >> > libbpf: collected 0 externs total >>>> >> > libbpf: map 'sd_restrictif': at sec_idx 8, offset 0. >>>> >> > libbpf: map 'sd_restrictif': found type =3D 1. >>>> >> > libbpf: map 'sd_restrictif': found key [12], sz =3D 4. >>>> >> > libbpf: map 'sd_restrictif': found value [3], sz =3D 1. >>>> >> > libbpf: map 'restrict.data' (global data): at sec_idx 3, offset 0= , flags 400. >>>> >> > libbpf: map 1 is "restrict.data" >>>> >> > libbpf: map 'restrict.bss' (global data): at sec_idx 4, offset 0,= flags 400. >>>> >> > libbpf: failed to alloc map 'restrict.bss' content buffer: -22 >>>> >> > Error: failed to open BPF object file: Invalid argument >>>> >> > >>>> >> > LLVM: >>>> >> > $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/= bpftool >>>> >> > --debug gen skeleton restrict-ifaces.bpf.o >>>> >> > libbpf: loading object 'restrict_ifaces_bpf' from buffer >>>> >> > libbpf: elf: section(2) .symtab, size 384, link 1, flags 0, type= =3D2 >>>> >> > libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flag= s 6, type=3D1 >>>> >> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' = at >>>> >> > insn offset 0 (0 bytes), code size 19 insns (152 bytes) >>>> >> > libbpf: elf: section(4) cgroup_skb/ingress, size 152, link 0, fla= gs 6, type=3D1 >>>> >> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i'= at >>>> >> > insn offset 0 (0 bytes), code size 19 insns (152 bytes) >>>> >> > libbpf: elf: section(5) .rodata, size 1, link 0, flags 2, type=3D= 1 >>>> >> > libbpf: elf: section(6) license, size 18, link 0, flags 2, type= =3D1 >>>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> >> > libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=3D1 >>>> >> > libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, f= lags 40, type=3D9 >>>> >> > libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, = flags >>>> >> > 40, type=3D9 >>>> >> > libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type= =3D1 >>>> >> > libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, typ= e=3D1 >>>> >> > libbpf: looking for externs among 16 symbols... >>>> >> > libbpf: collected 0 externs total >>>> >> > libbpf: map 'sd_restrictif': at sec_idx 7, offset 0. >>>> >> > libbpf: map 'sd_restrictif': found type =3D 1. >>>> >> > libbpf: map 'sd_restrictif': found key [6], sz =3D 4. >>>> >> > libbpf: map 'sd_restrictif': found value [9], sz =3D 1. >>>> >> > libbpf: map 'restrict.rodata' (global data): at sec_idx 5, offset= 0, flags 480. >>>> >> > libbpf: map 1 is "restrict.rodata" >>>> >> > libbpf: sec '.relcgroup_skb/egress': collecting relocation for >>>> >> > section(3) 'cgroup_skb/egress' >>>> >> > libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd= _restrictif' >>>> >> > libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 7= , off >>>> >> > 0) for insn #4 >>>> >> > libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is= _allow_list' >>>> >> > libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.rodata= , sec >>>> >> > 5, off 0) for insn 7 >>>> >> > libbpf: sec '.relcgroup_skb/ingress': collecting relocation for >>>> >> > section(4) 'cgroup_skb/ingress' >>>> >> > libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 's= d_restrictif' >>>> >> > libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 7= , off >>>> >> > 0) for insn #4 >>>> >> > libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'i= s_allow_list' >>>> >> > libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.rodata= , sec >>>> >> > 5, off 0) for insn 7 >>>> >> > >>>> >> >> > >>>> >> >> > >> >>>> >> >> > >> Looking at libbpf.c, it seems to me that this may be due of= trying to >>>> >> >> > >> mmap 0 bytes in `bpf_object__init_internal_map': >>>> >> >> > >> >>>> >> >> > >> map->mmaped =3D mmap(NULL, bpf_map_mmap_sz(map), PR= OT_READ | PROT_WRITE, >>>> >> >> > >> MAP_SHARED | MAP_ANONYMOUS, -1, = 0); >>>> >> >> > >> if (map->mmaped =3D=3D MAP_FAILED) { >>>> >> >> > >> err =3D -errno; >>>> >> >> > >> map->mmaped =3D NULL; >>>> >> >> > >> pr_warn("failed to alloc map '%s' content b= uffer: %d\n", >>>> >> >> > >> map->name, err); >>>> >> >> > >> zfree(&map->real_name); >>>> >> >> > >> zfree(&map->name); >>>> >> >> > >> return err; >>>> >> >> > >> } >>>> >> >> > >> >>>> >> >> > >> I see no check for zero sized sections in >>>> >> >> > >> bpf_object__init_global_data_maps. >>>> >> >> > >> >>>> >> >> > >> Is maybe GCC failing to allocate stuff in BSS that is suppo= sed to be >>>> >> >> > >> there? >>>> >> >> > >> >>>> >> >> > >> > Stripped file passed to gen skeleton: >>>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host= /sbin/bpftool >>>> >> >> > >> > btf dump file >>>> >> >> > >> > >> output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-= ifaces.bpf.o >>>> >> >> > >> > format raw >>>> >> >> > >> > [1] INT 'signed char' size=3D1 bits_offset=3D0 nr_bits=3D= 8 encoding=3DUNKN >>>> >> >> > >> > [2] INT 'unsigned char' size=3D1 bits_offset=3D0 nr_bits= =3D8 encoding=3DCHAR >>>> >> >> > >> > [3] TYPEDEF '__u8' type_id=3D2 >>>> >> >> > >> > [4] CONST '(anon)' type_id=3D3 >>>> >> >> > >> > [5] VOLATILE '(anon)' type_id=3D4 >>>> >> >> > >> > [6] INT 'short int' size=3D2 bits_offset=3D0 nr_bits=3D16= encoding=3DSIGNED >>>> >> >> > >> > [7] INT 'short unsigned int' size=3D2 bits_offset=3D0 nr_= bits=3D16 encoding=3D(none) >>>> >> >> > >> > [8] TYPEDEF '__u16' type_id=3D7 >>>> >> >> > >> > [9] INT 'int' size=3D4 bits_offset=3D0 nr_bits=3D32 encod= ing=3DSIGNED >>>> >> >> > >> > [10] TYPEDEF '__s32' type_id=3D9 >>>> >> >> > >> > [11] INT 'unsigned int' size=3D4 bits_offset=3D0 nr_bits= =3D32 encoding=3D(none) >>>> >> >> > >> > [12] TYPEDEF '__u32' type_id=3D11 >>>> >> >> > >> > [13] INT 'long long int' size=3D8 bits_offset=3D0 nr_bits= =3D64 encoding=3DSIGNED >>>> >> >> > >> > [14] INT 'long long unsigned int' size=3D8 bits_offset=3D= 0 nr_bits=3D64 >>>> >> >> > >> > encoding=3D(none) >>>> >> >> > >> > [15] TYPEDEF '__u64' type_id=3D14 >>>> >> >> > >> > [16] INT 'long unsigned int' size=3D8 bits_offset=3D0 nr_= bits=3D64 encoding=3D(none) >>>> >> >> > >> > [17] INT 'long int' size=3D8 bits_offset=3D0 nr_bits=3D64= encoding=3DSIGNED >>>> >> >> > >> > [18] INT 'char' size=3D1 bits_offset=3D0 nr_bits=3D8 enco= ding=3DUNKN >>>> >> >> > >> > [19] CONST '(anon)' type_id=3D18 >>>> >> >> > >> > [20] TYPEDEF '__be16' type_id=3D8 >>>> >> >> > >> > [21] TYPEDEF '__be32' type_id=3D12 >>>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=3DUNSIGNED size=3D4 vle= n=3D31 >>>> >> >> > >> > 'BPF_MAP_TYPE_UNSPEC' val=3D0 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH' val=3D1 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY' val=3D2 >>>> >> >> > >> > 'BPF_MAP_TYPE_PROG_ARRAY' val=3D3 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=3D4 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_HASH' val=3D5 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_ARRAY' val=3D6 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK_TRACE' val=3D7 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_ARRAY' val=3D8 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_HASH' val=3D9 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=3D10 >>>> >> >> > >> > 'BPF_MAP_TYPE_LPM_TRIE' val=3D11 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=3D12 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH_OF_MAPS' val=3D13 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP' val=3D14 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKMAP' val=3D15 >>>> >> >> > >> > 'BPF_MAP_TYPE_CPUMAP' val=3D16 >>>> >> >> > >> > 'BPF_MAP_TYPE_XSKMAP' val=3D17 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKHASH' val=3D18 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_STORAGE' val=3D19 >>>> >> >> > >> > 'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=3D20 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=3D21 >>>> >> >> > >> > 'BPF_MAP_TYPE_QUEUE' val=3D22 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK' val=3D23 >>>> >> >> > >> > 'BPF_MAP_TYPE_SK_STORAGE' val=3D24 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP_HASH' val=3D25 >>>> >> >> > >> > 'BPF_MAP_TYPE_STRUCT_OPS' val=3D26 >>>> >> >> > >> > 'BPF_MAP_TYPE_RINGBUF' val=3D27 >>>> >> >> > >> > 'BPF_MAP_TYPE_INODE_STORAGE' val=3D28 >>>> >> >> > >> > 'BPF_MAP_TYPE_TASK_STORAGE' val=3D29 >>>> >> >> > >> > 'BPF_MAP_TYPE_BLOOM_FILTER' val=3D30 >>>> >> >> > >> > [23] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> > >> > 'flow_keys' type_id=3D29 bits_offset=3D0 >>>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=3D56 vlen=3D13 >>>> >> >> > >> > 'nhoff' type_id=3D8 bits_offset=3D0 >>>> >> >> > >> > 'thoff' type_id=3D8 bits_offset=3D16 >>>> >> >> > >> > 'addr_proto' type_id=3D8 bits_offset=3D32 >>>> >> >> > >> > 'is_frag' type_id=3D3 bits_offset=3D48 >>>> >> >> > >> > 'is_first_frag' type_id=3D3 bits_offset=3D56 >>>> >> >> > >> > 'is_encap' type_id=3D3 bits_offset=3D64 >>>> >> >> > >> > 'ip_proto' type_id=3D3 bits_offset=3D72 >>>> >> >> > >> > 'n_proto' type_id=3D20 bits_offset=3D80 >>>> >> >> > >> > 'sport' type_id=3D20 bits_offset=3D96 >>>> >> >> > >> > 'dport' type_id=3D20 bits_offset=3D112 >>>> >> >> > >> > '(anon)' type_id=3D25 bits_offset=3D128 >>>> >> >> > >> > 'flags' type_id=3D12 bits_offset=3D384 >>>> >> >> > >> > 'flow_label' type_id=3D21 bits_offset=3D416 >>>> >> >> > >> > [25] UNION '(anon)' size=3D32 vlen=3D2 >>>> >> >> > >> > '(anon)' type_id=3D26 bits_offset=3D0 >>>> >> >> > >> > '(anon)' type_id=3D27 bits_offset=3D0 >>>> >> >> > >> > [26] STRUCT '(anon)' size=3D8 vlen=3D2 >>>> >> >> > >> > 'ipv4_src' type_id=3D21 bits_offset=3D0 >>>> >> >> > >> > 'ipv4_dst' type_id=3D21 bits_offset=3D32 >>>> >> >> > >> > [27] STRUCT '(anon)' size=3D32 vlen=3D2 >>>> >> >> > >> > 'ipv6_src' type_id=3D28 bits_offset=3D0 >>>> >> >> > >> > 'ipv6_dst' type_id=3D28 bits_offset=3D128 >>>> >> >> > >> > [28] ARRAY '(anon)' type_id=3D12 index_type_id=3D16 nr_el= ems=3D4 >>>> >> >> > >> > [29] PTR '(anon)' type_id=3D24 >>>> >> >> > >> > [30] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D32 bits_offset=3D0 >>>> >> >> > >> > [31] STRUCT 'bpf_sock' size=3D80 vlen=3D14 >>>> >> >> > >> > 'bound_dev_if' type_id=3D12 bits_offset=3D0 >>>> >> >> > >> > 'family' type_id=3D12 bits_offset=3D32 >>>> >> >> > >> > 'type' type_id=3D12 bits_offset=3D64 >>>> >> >> > >> > 'protocol' type_id=3D12 bits_offset=3D96 >>>> >> >> > >> > 'mark' type_id=3D12 bits_offset=3D128 >>>> >> >> > >> > 'priority' type_id=3D12 bits_offset=3D160 >>>> >> >> > >> > 'src_ip4' type_id=3D12 bits_offset=3D192 >>>> >> >> > >> > 'src_ip6' type_id=3D28 bits_offset=3D224 >>>> >> >> > >> > 'src_port' type_id=3D12 bits_offset=3D352 >>>> >> >> > >> > 'dst_port' type_id=3D20 bits_offset=3D384 >>>> >> >> > >> > 'dst_ip4' type_id=3D12 bits_offset=3D416 >>>> >> >> > >> > 'dst_ip6' type_id=3D28 bits_offset=3D448 >>>> >> >> > >> > 'state' type_id=3D12 bits_offset=3D576 >>>> >> >> > >> > 'rx_queue_mapping' type_id=3D10 bits_offset=3D608 >>>> >> >> > >> > [32] PTR '(anon)' type_id=3D31 >>>> >> >> > >> > [33] STRUCT '__sk_buff' size=3D192 vlen=3D33 >>>> >> >> > >> > 'len' type_id=3D12 bits_offset=3D0 >>>> >> >> > >> > 'pkt_type' type_id=3D12 bits_offset=3D32 >>>> >> >> > >> > 'mark' type_id=3D12 bits_offset=3D64 >>>> >> >> > >> > 'queue_mapping' type_id=3D12 bits_offset=3D96 >>>> >> >> > >> > 'protocol' type_id=3D12 bits_offset=3D128 >>>> >> >> > >> > 'vlan_present' type_id=3D12 bits_offset=3D160 >>>> >> >> > >> > 'vlan_tci' type_id=3D12 bits_offset=3D192 >>>> >> >> > >> > 'vlan_proto' type_id=3D12 bits_offset=3D224 >>>> >> >> > >> > 'priority' type_id=3D12 bits_offset=3D256 >>>> >> >> > >> > 'ingress_ifindex' type_id=3D12 bits_offset=3D288 >>>> >> >> > >> > 'ifindex' type_id=3D12 bits_offset=3D320 >>>> >> >> > >> > 'tc_index' type_id=3D12 bits_offset=3D352 >>>> >> >> > >> > 'cb' type_id=3D34 bits_offset=3D384 >>>> >> >> > >> > 'hash' type_id=3D12 bits_offset=3D544 >>>> >> >> > >> > 'tc_classid' type_id=3D12 bits_offset=3D576 >>>> >> >> > >> > 'data' type_id=3D12 bits_offset=3D608 >>>> >> >> > >> > 'data_end' type_id=3D12 bits_offset=3D640 >>>> >> >> > >> > 'napi_id' type_id=3D12 bits_offset=3D672 >>>> >> >> > >> > 'family' type_id=3D12 bits_offset=3D704 >>>> >> >> > >> > 'remote_ip4' type_id=3D12 bits_offset=3D736 >>>> >> >> > >> > 'local_ip4' type_id=3D12 bits_offset=3D768 >>>> >> >> > >> > 'remote_ip6' type_id=3D28 bits_offset=3D800 >>>> >> >> > >> > 'local_ip6' type_id=3D28 bits_offset=3D928 >>>> >> >> > >> > 'remote_port' type_id=3D12 bits_offset=3D1056 >>>> >> >> > >> > 'local_port' type_id=3D12 bits_offset=3D1088 >>>> >> >> > >> > 'data_meta' type_id=3D12 bits_offset=3D1120 >>>> >> >> > >> > '(anon)' type_id=3D23 bits_offset=3D1152 >>>> >> >> > >> > 'tstamp' type_id=3D15 bits_offset=3D1216 >>>> >> >> > >> > 'wire_len' type_id=3D12 bits_offset=3D1280 >>>> >> >> > >> > 'gso_segs' type_id=3D12 bits_offset=3D1312 >>>> >> >> > >> > '(anon)' type_id=3D30 bits_offset=3D1344 >>>> >> >> > >> > 'gso_size' type_id=3D12 bits_offset=3D1408 >>>> >> >> > >> > 'hwtstamp' type_id=3D15 bits_offset=3D1472 >>>> >> >> > >> > [34] ARRAY '(anon)' type_id=3D12 index_type_id=3D16 nr_el= ems=3D5 >>>> >> >> > >> > [35] CONST '(anon)' type_id=3D33 >>>> >> >> > >> > [36] PTR '(anon)' type_id=3D0 >>>> >> >> > >> > [37] STRUCT '(anon)' size=3D24 vlen=3D3 >>>> >> >> > >> > 'type' type_id=3D39 bits_offset=3D0 >>>> >> >> > >> > 'key' type_id=3D40 bits_offset=3D64 >>>> >> >> > >> > 'value' type_id=3D41 bits_offset=3D128 >>>> >> >> > >> > [38] ARRAY '(anon)' type_id=3D9 index_type_id=3D16 nr_ele= ms=3D1 >>>> >> >> > >> > [39] PTR '(anon)' type_id=3D38 >>>> >> >> > >> > [40] PTR '(anon)' type_id=3D12 >>>> >> >> > >> > [41] PTR '(anon)' type_id=3D3 >>>> >> >> > >> > [42] ARRAY '(anon)' type_id=3D19 index_type_id=3D16 nr_el= ems=3D18 >>>> >> >> > >> > [43] CONST '(anon)' type_id=3D42 >>>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=3D36 vlen=3D2 >>>> >> >> > >> > '(anon)' type_id=3D36 >>>> >> >> > >> > '(anon)' type_id=3D46 >>>> >> >> > >> > [45] CONST '(anon)' type_id=3D0 >>>> >> >> > >> > [46] PTR '(anon)' type_id=3D45 >>>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=3D9 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D48 >>>> >> >> > >> > [48] PTR '(anon)' type_id=3D35 >>>> >> >> > >> > [49] VAR '_license' type_id=3D43, linkage=3Dstatic >>>> >> >> > >> > [50] VAR 'is_allow_list' type_id=3D5, linkage=3Dglobal >>>> >> >> > >> > [51] VAR 'sd_restrictif' type_id=3D37, linkage=3Dglobal >>>> >> >> > >> > [52] FUNC 'sd_restrictif_i' type_id=3D47 linkage=3Dglobal >>>> >> >> > >> > [53] FUNC 'sd_restrictif_e' type_id=3D47 linkage=3Dglobal >>>> >> >> > >> > [54] FUNC 'restrict_network_interfaces_impl' type_id=3D47= linkage=3Dstatic >>>> >> >> > >> > [55] DATASEC '.data' size=3D1 vlen=3D1 >>>> >> >> > >> > type_id=3D50 offset=3D0 size=3D1 (VAR 'is_allow_list'= ) >>>> >> >> > >> > [56] DATASEC 'license' size=3D18 vlen=3D1 >>>> >> >> > >> > type_id=3D49 offset=3D0 size=3D18 (VAR '_license') >>>> >> >> > >> > [57] DATASEC '.maps' size=3D24 vlen=3D1 >>>> >> >> > >> > type_id=3D51 offset=3D0 size=3D24 (VAR 'sd_restrictif= ') >>>> >> >> > >> > >>>> >> >> > >> > File before being stripped using bpftool gen object: >>>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host= /sbin/bpftool >>>> >> >> > >> > btf dump file >>>> >> >> > >> > >>>> >> > >>>> > >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-i= faces.bpf.unstripped.o >>>> >> >> > >> > format raw >>>> >> >> > >> > [1] INT 'signed char' size=3D1 bits_offset=3D0 nr_bits=3D= 8 encoding=3DUNKN >>>> >> >> > >> > [2] INT 'unsigned char' size=3D1 bits_offset=3D0 nr_bits= =3D8 encoding=3DCHAR >>>> >> >> > >> > [3] TYPEDEF '__u8' type_id=3D2 >>>> >> >> > >> > [4] CONST '(anon)' type_id=3D3 >>>> >> >> > >> > [5] VOLATILE '(anon)' type_id=3D4 >>>> >> >> > >> > [6] INT 'short int' size=3D2 bits_offset=3D0 nr_bits=3D16= encoding=3DSIGNED >>>> >> >> > >> > [7] INT 'short unsigned int' size=3D2 bits_offset=3D0 nr_= bits=3D16 encoding=3D(none) >>>> >> >> > >> > [8] TYPEDEF '__u16' type_id=3D7 >>>> >> >> > >> > [9] INT 'int' size=3D4 bits_offset=3D0 nr_bits=3D32 encod= ing=3DSIGNED >>>> >> >> > >> > [10] TYPEDEF '__s32' type_id=3D9 >>>> >> >> > >> > [11] INT 'unsigned int' size=3D4 bits_offset=3D0 nr_bits= =3D32 encoding=3D(none) >>>> >> >> > >> > [12] TYPEDEF '__u32' type_id=3D11 >>>> >> >> > >> > [13] INT 'long long int' size=3D8 bits_offset=3D0 nr_bits= =3D64 encoding=3DSIGNED >>>> >> >> > >> > [14] INT 'long long unsigned int' size=3D8 bits_offset=3D= 0 nr_bits=3D64 >>>> >> >> > >> > encoding=3D(none) >>>> >> >> > >> > [15] TYPEDEF '__u64' type_id=3D14 >>>> >> >> > >> > [16] INT 'long unsigned int' size=3D8 bits_offset=3D0 nr_= bits=3D64 encoding=3D(none) >>>> >> >> > >> > [17] INT 'long int' size=3D8 bits_offset=3D0 nr_bits=3D64= encoding=3DSIGNED >>>> >> >> > >> > [18] INT 'char' size=3D1 bits_offset=3D0 nr_bits=3D8 enco= ding=3DUNKN >>>> >> >> > >> > [19] CONST '(anon)' type_id=3D18 >>>> >> >> > >> > [20] TYPEDEF '__be16' type_id=3D8 >>>> >> >> > >> > [21] TYPEDEF '__be32' type_id=3D12 >>>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=3DUNSIGNED size=3D4 vle= n=3D31 >>>> >> >> > >> > 'BPF_MAP_TYPE_UNSPEC' val=3D0 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH' val=3D1 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY' val=3D2 >>>> >> >> > >> > 'BPF_MAP_TYPE_PROG_ARRAY' val=3D3 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=3D4 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_HASH' val=3D5 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_ARRAY' val=3D6 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK_TRACE' val=3D7 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_ARRAY' val=3D8 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_HASH' val=3D9 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=3D10 >>>> >> >> > >> > 'BPF_MAP_TYPE_LPM_TRIE' val=3D11 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=3D12 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH_OF_MAPS' val=3D13 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP' val=3D14 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKMAP' val=3D15 >>>> >> >> > >> > 'BPF_MAP_TYPE_CPUMAP' val=3D16 >>>> >> >> > >> > 'BPF_MAP_TYPE_XSKMAP' val=3D17 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKHASH' val=3D18 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_STORAGE' val=3D19 >>>> >> >> > >> > 'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=3D20 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=3D21 >>>> >> >> > >> > 'BPF_MAP_TYPE_QUEUE' val=3D22 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK' val=3D23 >>>> >> >> > >> > 'BPF_MAP_TYPE_SK_STORAGE' val=3D24 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP_HASH' val=3D25 >>>> >> >> > >> > 'BPF_MAP_TYPE_STRUCT_OPS' val=3D26 >>>> >> >> > >> > 'BPF_MAP_TYPE_RINGBUF' val=3D27 >>>> >> >> > >> > 'BPF_MAP_TYPE_INODE_STORAGE' val=3D28 >>>> >> >> > >> > 'BPF_MAP_TYPE_TASK_STORAGE' val=3D29 >>>> >> >> > >> > 'BPF_MAP_TYPE_BLOOM_FILTER' val=3D30 >>>> >> >> > >> > [23] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> > >> > 'flow_keys' type_id=3D29 bits_offset=3D0 >>>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=3D56 vlen=3D13 >>>> >> >> > >> > 'nhoff' type_id=3D8 bits_offset=3D0 >>>> >> >> > >> > 'thoff' type_id=3D8 bits_offset=3D16 >>>> >> >> > >> > 'addr_proto' type_id=3D8 bits_offset=3D32 >>>> >> >> > >> > 'is_frag' type_id=3D3 bits_offset=3D48 >>>> >> >> > >> > 'is_first_frag' type_id=3D3 bits_offset=3D56 >>>> >> >> > >> > 'is_encap' type_id=3D3 bits_offset=3D64 >>>> >> >> > >> > 'ip_proto' type_id=3D3 bits_offset=3D72 >>>> >> >> > >> > 'n_proto' type_id=3D20 bits_offset=3D80 >>>> >> >> > >> > 'sport' type_id=3D20 bits_offset=3D96 >>>> >> >> > >> > 'dport' type_id=3D20 bits_offset=3D112 >>>> >> >> > >> > '(anon)' type_id=3D25 bits_offset=3D128 >>>> >> >> > >> > 'flags' type_id=3D12 bits_offset=3D384 >>>> >> >> > >> > 'flow_label' type_id=3D21 bits_offset=3D416 >>>> >> >> > >> > [25] UNION '(anon)' size=3D32 vlen=3D2 >>>> >> >> > >> > '(anon)' type_id=3D26 bits_offset=3D0 >>>> >> >> > >> > '(anon)' type_id=3D27 bits_offset=3D0 >>>> >> >> > >> > [26] STRUCT '(anon)' size=3D8 vlen=3D2 >>>> >> >> > >> > 'ipv4_src' type_id=3D21 bits_offset=3D0 >>>> >> >> > >> > 'ipv4_dst' type_id=3D21 bits_offset=3D32 >>>> >> >> > >> > [27] STRUCT '(anon)' size=3D32 vlen=3D2 >>>> >> >> > >> > 'ipv6_src' type_id=3D28 bits_offset=3D0 >>>> >> >> > >> > 'ipv6_dst' type_id=3D28 bits_offset=3D128 >>>> >> >> > >> > [28] ARRAY '(anon)' type_id=3D12 index_type_id=3D16 nr_el= ems=3D4 >>>> >> >> > >> > [29] PTR '(anon)' type_id=3D24 >>>> >> >> > >> > [30] UNION '(anon)' size=3D8 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D32 bits_offset=3D0 >>>> >> >> > >> > [31] STRUCT 'bpf_sock' size=3D80 vlen=3D14 >>>> >> >> > >> > 'bound_dev_if' type_id=3D12 bits_offset=3D0 >>>> >> >> > >> > 'family' type_id=3D12 bits_offset=3D32 >>>> >> >> > >> > 'type' type_id=3D12 bits_offset=3D64 >>>> >> >> > >> > 'protocol' type_id=3D12 bits_offset=3D96 >>>> >> >> > >> > 'mark' type_id=3D12 bits_offset=3D128 >>>> >> >> > >> > 'priority' type_id=3D12 bits_offset=3D160 >>>> >> >> > >> > 'src_ip4' type_id=3D12 bits_offset=3D192 >>>> >> >> > >> > 'src_ip6' type_id=3D28 bits_offset=3D224 >>>> >> >> > >> > 'src_port' type_id=3D12 bits_offset=3D352 >>>> >> >> > >> > 'dst_port' type_id=3D20 bits_offset=3D384 >>>> >> >> > >> > 'dst_ip4' type_id=3D12 bits_offset=3D416 >>>> >> >> > >> > 'dst_ip6' type_id=3D28 bits_offset=3D448 >>>> >> >> > >> > 'state' type_id=3D12 bits_offset=3D576 >>>> >> >> > >> > 'rx_queue_mapping' type_id=3D10 bits_offset=3D608 >>>> >> >> > >> > [32] PTR '(anon)' type_id=3D31 >>>> >> >> > >> > [33] STRUCT '__sk_buff' size=3D192 vlen=3D33 >>>> >> >> > >> > 'len' type_id=3D12 bits_offset=3D0 >>>> >> >> > >> > 'pkt_type' type_id=3D12 bits_offset=3D32 >>>> >> >> > >> > 'mark' type_id=3D12 bits_offset=3D64 >>>> >> >> > >> > 'queue_mapping' type_id=3D12 bits_offset=3D96 >>>> >> >> > >> > 'protocol' type_id=3D12 bits_offset=3D128 >>>> >> >> > >> > 'vlan_present' type_id=3D12 bits_offset=3D160 >>>> >> >> > >> > 'vlan_tci' type_id=3D12 bits_offset=3D192 >>>> >> >> > >> > 'vlan_proto' type_id=3D12 bits_offset=3D224 >>>> >> >> > >> > 'priority' type_id=3D12 bits_offset=3D256 >>>> >> >> > >> > 'ingress_ifindex' type_id=3D12 bits_offset=3D288 >>>> >> >> > >> > 'ifindex' type_id=3D12 bits_offset=3D320 >>>> >> >> > >> > 'tc_index' type_id=3D12 bits_offset=3D352 >>>> >> >> > >> > 'cb' type_id=3D34 bits_offset=3D384 >>>> >> >> > >> > 'hash' type_id=3D12 bits_offset=3D544 >>>> >> >> > >> > 'tc_classid' type_id=3D12 bits_offset=3D576 >>>> >> >> > >> > 'data' type_id=3D12 bits_offset=3D608 >>>> >> >> > >> > 'data_end' type_id=3D12 bits_offset=3D640 >>>> >> >> > >> > 'napi_id' type_id=3D12 bits_offset=3D672 >>>> >> >> > >> > 'family' type_id=3D12 bits_offset=3D704 >>>> >> >> > >> > 'remote_ip4' type_id=3D12 bits_offset=3D736 >>>> >> >> > >> > 'local_ip4' type_id=3D12 bits_offset=3D768 >>>> >> >> > >> > 'remote_ip6' type_id=3D28 bits_offset=3D800 >>>> >> >> > >> > 'local_ip6' type_id=3D28 bits_offset=3D928 >>>> >> >> > >> > 'remote_port' type_id=3D12 bits_offset=3D1056 >>>> >> >> > >> > 'local_port' type_id=3D12 bits_offset=3D1088 >>>> >> >> > >> > 'data_meta' type_id=3D12 bits_offset=3D1120 >>>> >> >> > >> > '(anon)' type_id=3D23 bits_offset=3D1152 >>>> >> >> > >> > 'tstamp' type_id=3D15 bits_offset=3D1216 >>>> >> >> > >> > 'wire_len' type_id=3D12 bits_offset=3D1280 >>>> >> >> > >> > 'gso_segs' type_id=3D12 bits_offset=3D1312 >>>> >> >> > >> > '(anon)' type_id=3D30 bits_offset=3D1344 >>>> >> >> > >> > 'gso_size' type_id=3D12 bits_offset=3D1408 >>>> >> >> > >> > 'hwtstamp' type_id=3D15 bits_offset=3D1472 >>>> >> >> > >> > [34] ARRAY '(anon)' type_id=3D12 index_type_id=3D16 nr_el= ems=3D5 >>>> >> >> > >> > [35] CONST '(anon)' type_id=3D33 >>>> >> >> > >> > [36] PTR '(anon)' type_id=3D0 >>>> >> >> > >> > [37] STRUCT '(anon)' size=3D24 vlen=3D3 >>>> >> >> > >> > 'type' type_id=3D39 bits_offset=3D0 >>>> >> >> > >> > 'key' type_id=3D40 bits_offset=3D64 >>>> >> >> > >> > 'value' type_id=3D41 bits_offset=3D128 >>>> >> >> > >> > [38] ARRAY '(anon)' type_id=3D9 index_type_id=3D16 nr_ele= ms=3D1 >>>> >> >> > >> > [39] PTR '(anon)' type_id=3D38 >>>> >> >> > >> > [40] PTR '(anon)' type_id=3D12 >>>> >> >> > >> > [41] PTR '(anon)' type_id=3D3 >>>> >> >> > >> > [42] ARRAY '(anon)' type_id=3D19 index_type_id=3D16 nr_el= ems=3D18 >>>> >> >> > >> > [43] CONST '(anon)' type_id=3D42 >>>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=3D36 vlen=3D2 >>>> >> >> > >> > '(anon)' type_id=3D36 >>>> >> >> > >> > '(anon)' type_id=3D46 >>>> >> >> > >> > [45] CONST '(anon)' type_id=3D0 >>>> >> >> > >> > [46] PTR '(anon)' type_id=3D45 >>>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=3D9 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D48 >>>> >> >> > >> > [48] PTR '(anon)' type_id=3D35 >>>> >> >> > >> > [49] FUNC_PROTO '(anon)' ret_type_id=3D9 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D48 >>>> >> >> > >> > [50] FUNC_PROTO '(anon)' ret_type_id=3D9 vlen=3D1 >>>> >> >> > >> > 'sk' type_id=3D48 >>>> >> >> > >> > [51] VAR '_license' type_id=3D43, linkage=3Dstatic >>>> >> >> > >> > [52] VAR 'is_allow_list' type_id=3D5, linkage=3Dglobal >>>> >> >> > >> > [53] VAR 'sd_restrictif' type_id=3D37, linkage=3Dglobal >>>> >> >> > >> > [54] FUNC 'bpf_map_lookup_elem' type_id=3D44 linkage=3Dgl= obal >>>> >> >> > >> > [55] FUNC 'sd_restrictif_i' type_id=3D47 linkage=3Dglobal >>>> >> >> > >> > [56] FUNC 'sd_restrictif_e' type_id=3D49 linkage=3Dglobal >>>> >> >> > >> > [57] FUNC 'restrict_network_interfaces_impl' type_id=3D50= linkage=3Dstatic >>>> >> >> > >> > [58] DATASEC 'license' size=3D0 vlen=3D1 >>>> >> >> > >> > type_id=3D51 offset=3D0 size=3D18 (VAR '_license') >>>> >> >> > >> > [59] DATASEC '.maps' size=3D0 vlen=3D1 >>>> >> >> > >> > type_id=3D53 offset=3D0 size=3D24 (VAR 'sd_restrictif= ') >>>> >> >> > >> > [60] DATASEC '.data' size=3D0 vlen=3D1 >>>> >> >> > >> > type_id=3D52 offset=3D0 size=3D1 (VAR 'is_allow_list'= ) >>>> >> >> > >> > >>>> >> >> > >> >> >>>> >> >> > >> >> >> GCC is wrong, clearly. This function is global ([0]) = and libbpf >>>> >> >> > >> >> >> expects it to be marked as such in BTF. >>>> >> >> > >> >> >> >>>> >> >> > >> >> >> >>>> >> >> > >> > >>>> >> > >>>> > >> > https://github.com/systemd/systemd/blob/main/src/core/bpf/restrict_ifaces= /restrict-ifaces.bpf.c#L42-L50 >>>> >> >> > >> >> >> >>>> >> >> > >> >> >> >>>> >> >> > >> >> >>> GCC: >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> [1] INT 'signed char' size=3D1 bits_offset=3D0 nr_bi= ts=3D8 encoding=3DUNKN >>>> >> >> > >> >> >>> [2] INT 'unsigned char' size=3D1 bits_offset=3D0 nr_= bits=3D8 encoding=3DCHAR >>>> >> >> > >> >> >>> [3] TYPEDEF '__u8' type_id=3D2 >>>> >> >> > >> >> >>> [4] CONST '(anon)' type_id=3D3 >>>> >> >> > >> >> >> >>>> >> >> > >> >> >> [...]