>>> On Sun, Jul 10, 2022 at 3:38 AM Jose E. Marchesi >>> <jose.marchesi@xxxxxxxxxx> wrote: >>>> >>>> >>>> > On Sat, Jul 9, 2022 at 4:41 PM Jose E. Marchesi >>>> > <jose.marchesi@xxxxxxxxxx> wrote: >>>> >> >>>> >> >>>> >> > On Sat, Jul 9, 2022 at 2:32 PM James Hilliard <james.hilliard1@xxxxxxxxx> wrote: >>>> >> >> >>>> >> >> On Sat, Jul 9, 2022 at 2:21 PM Jose E. Marchesi >>>> >> >> <jose.marchesi@xxxxxxxxxx> wrote: >>>> >> >> > >>>> >> >> > >>>> >> >> > > On Sat, Jul 9, 2022 at 11:24 AM Jose E. Marchesi >>>> >> >> > > <jose.marchesi@xxxxxxxxxx> wrote: >>>> >> >> > >> >>>> >> >> > >> >>>> >> >> > >> > On Fri, Jul 8, 2022 at 12:33 PM Jose E. Marchesi >>>> >> >> > >> > <jose.marchesi@xxxxxxxxxx> wrote: >>>> >> >> > >> >> >>>> >> >> > >> >> >>>> >> >> > >> >> >> On Wed, Jul 6, 2022 at 10:13 AM James Hilliard >>>> >> >> > >> >> >> <james.hilliard1@xxxxxxxxx> wrote: >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> Note I'm testing with the following patches: >>>> >> >> > >> >> >>> >> https://lore.kernel.org/bpf/20220706111839.1247911-1-james.hilliard1@xxxxxxxxx/ >>>> >> >> > >> >> >>> >> https://lore.kernel.org/bpf/20220706140623.2917858-1-james.hilliard1@xxxxxxxxx/ >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> It would appear there's some compatibility issues with 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-ifaces.bpf.o >>>> >> >> > >> >> >>> src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.unstripped.o >>>> >> >> > >> >> >>> libbpf: failed to find BTF info for global/extern symbol 'sd_restrictif_i' >>>> >> >> > >> >> >>> Error: failed to link >>>> >> >> > >> >> >>> 'src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.unstripped.o': >>>> >> >> > >> >> >>> Unknown error -2 (-2) >>>> >> >> > >> >> >>> >>>> >> >> > >> >> >>> Relevant difference seems to be this: >>>> >> >> > >> >> >>> GCC: >>>> >> >> > >> >> >>> [55] FUNC 'sd_restrictif_i' type_id=47 linkage=static >>>> >> >> > >> >> >>> Clang: >>>> >> >> > >> >> >>> [27] FUNC 'sd_restrictif_i' type_id=26 linkage=global >>>> >> >> > >> >> > >>>> >> >> > >> >> > For functions GCC generates a BTF_KIND_FUNC entry, which has no linkage >>>> >> >> > >> >> > information, or so we thought: I just looked at bpftool/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 adding 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/598090.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 skeleton 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) .comment >>>> >> >> > >> > 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? Try with: >>>> >> >> > >> >>>> >> >> > >> $ size restrict-ifaces.bpf.o >>>> >> >> > > >>>> >> >> > > $ size >>>> >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o >>>> >> >> > > text data bss dec hex filename >>>> >> >> > > 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 = 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 eventuality... >>>> >> >> >>>> >> >> 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=3 >>>> >> >> [2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED >>>> >> >> [3] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=1 >>>> >> >> [4] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none) >>>> >> >> [5] PTR '(anon)' type_id=6 >>>> >> >> [6] TYPEDEF '__u32' type_id=7 >>>> >> >> [7] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) >>>> >> >> [8] PTR '(anon)' type_id=9 >>>> >> >> [9] TYPEDEF '__u8' type_id=10 >>>> >> >> [10] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none) >>>> >> >> [11] STRUCT '(anon)' size=24 vlen=3 >>>> >> >> 'type' type_id=1 bits_offset=0 >>>> >> >> 'key' type_id=5 bits_offset=64 >>>> >> >> 'value' type_id=8 bits_offset=128 >>>> >> >> [12] VAR 'sd_restrictif' type_id=11, linkage=global >>>> >> >> [13] PTR '(anon)' type_id=14 >>>> >> >> [14] CONST '(anon)' type_id=15 >>>> >> >> [15] STRUCT '__sk_buff' size=192 vlen=33 >>>> >> >> 'len' type_id=6 bits_offset=0 >>>> >> >> 'pkt_type' type_id=6 bits_offset=32 >>>> >> >> 'mark' type_id=6 bits_offset=64 >>>> >> >> 'queue_mapping' type_id=6 bits_offset=96 >>>> >> >> 'protocol' type_id=6 bits_offset=128 >>>> >> >> 'vlan_present' type_id=6 bits_offset=160 >>>> >> >> 'vlan_tci' type_id=6 bits_offset=192 >>>> >> >> 'vlan_proto' type_id=6 bits_offset=224 >>>> >> >> 'priority' type_id=6 bits_offset=256 >>>> >> >> 'ingress_ifindex' type_id=6 bits_offset=288 >>>> >> >> 'ifindex' type_id=6 bits_offset=320 >>>> >> >> 'tc_index' type_id=6 bits_offset=352 >>>> >> >> 'cb' type_id=16 bits_offset=384 >>>> >> >> 'hash' type_id=6 bits_offset=544 >>>> >> >> 'tc_classid' type_id=6 bits_offset=576 >>>> >> >> 'data' type_id=6 bits_offset=608 >>>> >> >> 'data_end' type_id=6 bits_offset=640 >>>> >> >> 'napi_id' type_id=6 bits_offset=672 >>>> >> >> 'family' type_id=6 bits_offset=704 >>>> >> >> 'remote_ip4' type_id=6 bits_offset=736 >>>> >> >> 'local_ip4' type_id=6 bits_offset=768 >>>> >> >> 'remote_ip6' type_id=17 bits_offset=800 >>>> >> >> 'local_ip6' type_id=17 bits_offset=928 >>>> >> >> 'remote_port' type_id=6 bits_offset=1056 >>>> >> >> 'local_port' type_id=6 bits_offset=1088 >>>> >> >> 'data_meta' type_id=6 bits_offset=1120 >>>> >> >> '(anon)' type_id=18 bits_offset=1152 >>>> >> >> 'tstamp' type_id=20 bits_offset=1216 >>>> >> >> 'wire_len' type_id=6 bits_offset=1280 >>>> >> >> 'gso_segs' type_id=6 bits_offset=1312 >>>> >> >> '(anon)' type_id=22 bits_offset=1344 >>>> >> >> 'gso_size' type_id=6 bits_offset=1408 >>>> >> >> 'hwtstamp' type_id=20 bits_offset=1472 >>>> >> >> [16] ARRAY '(anon)' type_id=6 index_type_id=4 nr_elems=5 >>>> >> >> [17] ARRAY '(anon)' type_id=6 index_type_id=4 nr_elems=4 >>>> >> >> [18] UNION '(anon)' size=8 vlen=1 >>>> >> >> 'flow_keys' type_id=19 bits_offset=0 >>>> >> >> [19] PTR '(anon)' type_id=34 >>>> >> >> [20] TYPEDEF '__u64' type_id=21 >>>> >> >> [21] INT 'unsigned long long' size=8 bits_offset=0 nr_bits=64 encoding=(none) >>>> >> >> [22] UNION '(anon)' size=8 vlen=1 >>>> >> >> 'sk' type_id=23 bits_offset=0 >>>> >> >> [23] PTR '(anon)' type_id=35 >>>> >> >> [24] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1 >>>> >> >> 'sk' type_id=13 >>>> >> >> [25] FUNC 'sd_restrictif_e' type_id=24 linkage=global >>>> >> >> [26] FUNC 'sd_restrictif_i' type_id=24 linkage=global >>>> >> >> [27] CONST '(anon)' type_id=28 >>>> >> >> [28] VOLATILE '(anon)' type_id=9 >>>> >> >> [29] VAR 'is_allow_list' type_id=27, linkage=global >>>> >> >> [30] CONST '(anon)' type_id=31 >>>> >> >> [31] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED >>>> >> >> [32] ARRAY '(anon)' type_id=30 index_type_id=4 nr_elems=18 >>>> >> >> [33] VAR '_license' type_id=32, linkage=static >>>> >> >> [34] FWD 'bpf_flow_keys' fwd_kind=struct >>>> >> >> [35] FWD 'bpf_sock' fwd_kind=struct >>>> >> >> [36] DATASEC '.rodata' size=1 vlen=1 >>>> >> >> type_id=29 offset=0 size=1 (VAR 'is_allow_list') >>>> >> >> [37] DATASEC 'license' size=18 vlen=1 >>>> >> >> type_id=33 offset=0 size=18 (VAR '_license') >>>> >> >> [38] DATASEC '.maps' size=24 vlen=1 >>>> >> >> type_id=12 offset=0 size=24 (VAR 'sd_restrictif') >>>> >> >> >>>> >> > >>>> >> > Skeleton generation debug output for GCC(failing) and LLVM(working) >>>> >> > 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_maps 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(struct bpf_object *obj) >>>> for (sec_idx = 1; sec_idx < obj->efile.sec_cnt; sec_idx++) { >>>> sec_desc = &obj->efile.secs[sec_idx]; >>>> >>>> + /* Skip recognized sections with size 0. */ >>>> + if (sec_desc->data && sec_desc->data->d_size == 0) >>>> + continue; >>>> + >>>> switch (sec_desc->sec_type) { >>>> case SEC_DATA: >>>> sec_name = 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 ‘prepare_restrict_ifaces_bpf’: >>> ../src/core/restrict-ifaces.c:45:14: error: ‘struct >>> restrict_ifaces_bpf’ has no member named ‘rodata’; did you mean >>> ‘data’? >>> 45 | obj->rodata->is_allow_list = 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 = 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=25521. You may try, as a workaround: __attribute__((section(".rodata"))) const volatile unsigned char is_allow_list = 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/bpftool >>> --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=2 >>> libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1 >>> libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 >>> libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1 >>> 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=1 >>> 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=1 >>> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>> libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1 >>> libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1 >>> libbpf: elf: skipping unrecognized data section(9) .comment >>> libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags >>> 40, type=9 >>> libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>> flags 40, type=9 >>> libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1 >>> 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 = 1. >>> libbpf: map 'sd_restrictif': found key [12], sz = 4. >>> libbpf: map 'sd_restrictif': found value [3], sz = 1. >>> libbpf: map 'restrict.data' (global data): at sec_idx 3, offset 0, flags 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_restrictif' >>> 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_restrictif' >>> 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_allow_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 <errno.h> >>> #include <stdlib.h> >>> #include <bpf/libbpf.h> >>> >>> 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 = 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 = (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj)); >>> if (!obj) { >>> errno = ENOMEM; >>> return NULL; >>> } >>> >>> err = restrict_ifaces_bpf__create_skeleton(obj); >>> if (err) >>> goto err_out; >>> >>> err = bpf_object__open_skeleton(obj->skeleton, opts); >>> if (err) >>> goto err_out; >>> >>> return obj; >>> err_out: >>> restrict_ifaces_bpf__destroy(obj); >>> errno = -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 = restrict_ifaces_bpf__open(); >>> if (!obj) >>> return NULL; >>> err = restrict_ifaces_bpf__load(obj); >>> if (err) { >>> restrict_ifaces_bpf__destroy(obj); >>> errno = -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 = (struct bpf_object_skeleton *)calloc(1, sizeof(*s)); >>> if (!s) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->sz = sizeof(*s); >>> s->name = "restrict_ifaces_bpf"; >>> s->obj = &obj->obj; >>> >>> /* maps */ >>> s->map_cnt = 2; >>> s->map_skel_sz = sizeof(*s->maps); >>> s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz); >>> if (!s->maps) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->maps[0].name = "sd_restrictif"; >>> s->maps[0].map = &obj->maps.sd_restrictif; >>> >>> s->maps[1].name = "restrict.data"; >>> s->maps[1].map = &obj->maps.data; >>> s->maps[1].mmaped = (void **)&obj->data; >>> >>> /* programs */ >>> s->prog_cnt = 2; >>> s->prog_skel_sz = sizeof(*s->progs); >>> s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz); >>> if (!s->progs) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->progs[0].name = "sd_restrictif_e"; >>> s->progs[0].prog = &obj->progs.sd_restrictif_e; >>> s->progs[0].link = &obj->links.sd_restrictif_e; >>> >>> s->progs[1].name = "sd_restrictif_i"; >>> s->progs[1].prog = &obj->progs.sd_restrictif_i; >>> s->progs[1].link = &obj->links.sd_restrictif_i; >>> >>> s->data = (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz); >>> >>> obj->skeleton = s; >>> return 0; >>> err: >>> bpf_object__destroy_skeleton(s); >>> return err; >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz) >>> { >>> *sz = 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\x2e\x64\ >>> \x61\x74\x61\0\x2e\x62\x73\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\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\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\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\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\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\xb7\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\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\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\xb7\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\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\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\x61\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\x01\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\x08\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\xda\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\x40\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\x04\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\x15\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\x04\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\x0c\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\x36\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\x05\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\x40\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\x05\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\xe8\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\ >>> 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\x72\x66\x61\x63\x65\x73\x5f\x69\x6d\x70\x6c\0\x2e\x64\x61\x74\x61\0\x6c\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\x4f\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) == 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/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=2 >>> libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flags 6, type=1 >>> 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=1 >>> 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=1 >>> libbpf: elf: section(6) license, size 18, link 0, flags 2, type=1 >>> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>> libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=1 >>> libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, flags 40, type=9 >>> libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, flags >>> 40, type=9 >>> libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type=1 >>> libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, type=1 >>> 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 = 1. >>> libbpf: map 'sd_restrictif': found key [6], sz = 4. >>> libbpf: map 'sd_restrictif': found value [9], sz = 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 'sd_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 'is_allow_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 <errno.h> >>> #include <stdlib.h> >>> #include <bpf/libbpf.h> >>> >>> 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 = 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 = (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj)); >>> if (!obj) { >>> errno = ENOMEM; >>> return NULL; >>> } >>> >>> err = restrict_ifaces_bpf__create_skeleton(obj); >>> if (err) >>> goto err_out; >>> >>> err = bpf_object__open_skeleton(obj->skeleton, opts); >>> if (err) >>> goto err_out; >>> >>> return obj; >>> err_out: >>> restrict_ifaces_bpf__destroy(obj); >>> errno = -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 = restrict_ifaces_bpf__open(); >>> if (!obj) >>> return NULL; >>> err = restrict_ifaces_bpf__load(obj); >>> if (err) { >>> restrict_ifaces_bpf__destroy(obj); >>> errno = -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 = (struct bpf_object_skeleton *)calloc(1, sizeof(*s)); >>> if (!s) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->sz = sizeof(*s); >>> s->name = "restrict_ifaces_bpf"; >>> s->obj = &obj->obj; >>> >>> /* maps */ >>> s->map_cnt = 2; >>> s->map_skel_sz = sizeof(*s->maps); >>> s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz); >>> if (!s->maps) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->maps[0].name = "sd_restrictif"; >>> s->maps[0].map = &obj->maps.sd_restrictif; >>> >>> s->maps[1].name = "restrict.rodata"; >>> s->maps[1].map = &obj->maps.rodata; >>> s->maps[1].mmaped = (void **)&obj->rodata; >>> >>> /* programs */ >>> s->prog_cnt = 2; >>> s->prog_skel_sz = sizeof(*s->progs); >>> s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz); >>> if (!s->progs) { >>> err = -ENOMEM; >>> goto err; >>> } >>> >>> s->progs[0].name = "sd_restrictif_e"; >>> s->progs[0].prog = &obj->progs.sd_restrictif_e; >>> s->progs[0].link = &obj->links.sd_restrictif_e; >>> >>> s->progs[1].name = "sd_restrictif_i"; >>> s->progs[1].prog = &obj->progs.sd_restrictif_i; >>> s->progs[1].link = &obj->links.sd_restrictif_i; >>> >>> s->data = (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz); >>> >>> obj->skeleton = s; >>> return 0; >>> err: >>> bpf_object__destroy_skeleton(s); >>> return err; >>> } >>> >>> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz) >>> { >>> *sz = 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\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\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\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\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\x42\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\x12\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\xfc\xff\0\ >>> 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>>> \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\x02\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\x15\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\x11\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\x40\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\x05\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\x0c\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\x69\x67\ >>> \x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x38\0\x75\x6e\x73\x69\x67\x6e\x65\ >>> 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\x64\x2f\x73\x79\x73\x74\x65\x6d\x64\x2d\x63\x75\x73\x74\x6f\x6d\x2f\x73\x72\ >>> \x63\x2f\x63\x6f\x72\x65\x2f\x62\x70\x66\x2f\x72\x65\x73\x74\x72\x69\x63\x74\ >>> \x5f\x69\x66\x61\x63\x65\x73\x2f\x72\x65\x73\x74\x72\x69\x63\x74\x2d\x69\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\x64\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\x6f\x6b\ >>> \x75\x70\x5f\x65\x6c\x65\x6d\x28\x26\x73\x64\x5f\x72\x65\x73\x74\x72\x69\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\x6c\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\x6c\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\x72\x69\ >>> \x63\x74\x5f\x6e\x65\x74\x77\x6f\x72\x6b\x5f\x69\x6e\x74\x65\x72\x66\x61\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\x10\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\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\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\x19\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\x08\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\x03\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\x08\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) == 1, "unexpected >>> 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/bpftool >>>> > --debug gen skeleton >>>> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-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=2 >>>> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1 >>>> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 >>>> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1 >>>> > 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=1 >>>> > 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=1 >>>> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1 >>>> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1 >>>> > libbpf: elf: skipping unrecognized data section(9) .comment >>>> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags >>>> > 40, type=9 >>>> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>>> > flags 40, type=9 >>>> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1 >>>> > 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 = 1. >>>> > libbpf: map 'sd_restrictif': found key [12], sz = 4. >>>> > libbpf: map 'sd_restrictif': found value [3], sz = 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 = 1; sec_idx < obj->efile.sec_cnt; sec_idx++) { >>>> >> sec_desc = &obj->efile.secs[sec_idx]; >>>> >> >>>> >> + /* Skip empty sections. */ >>>> >> + if (sec_desc->data->d_size == 0) >>>> >> + continue; >>>> >> + >>>> >> switch (sec_desc->sec_type) { >>>> >> case SEC_DATA: >>>> >> sec_name = elf_sec_name(obj, elf_sec_by_idx(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/restrict-ifaces.bpf.o >>>> >> > libbpf: loading object 'restrict_ifaces_bpf' from buffer >>>> >> > libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=2 >>>> >> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1 >>>> >> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8 >>>> >> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1 >>>> >> > 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=1 >>>> >> > 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=1 >>>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> >> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1 >>>> >> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1 >>>> >> > libbpf: elf: skipping unrecognized data section(9) .comment >>>> >> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags >>>> >> > 40, type=9 >>>> >> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2, >>>> >> > flags 40, type=9 >>>> >> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1 >>>> >> > 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 = 1. >>>> >> > libbpf: map 'sd_restrictif': found key [12], sz = 4. >>>> >> > libbpf: map 'sd_restrictif': found value [3], sz = 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=2 >>>> >> > libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flags 6, type=1 >>>> >> > 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=1 >>>> >> > 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=1 >>>> >> > libbpf: elf: section(6) license, size 18, link 0, flags 2, type=1 >>>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later >>>> >> > libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=1 >>>> >> > libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, flags 40, type=9 >>>> >> > libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, flags >>>> >> > 40, type=9 >>>> >> > libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type=1 >>>> >> > libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, type=1 >>>> >> > 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 = 1. >>>> >> > libbpf: map 'sd_restrictif': found key [6], sz = 4. >>>> >> > libbpf: map 'sd_restrictif': found value [9], sz = 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 'sd_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 'is_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 = mmap(NULL, bpf_map_mmap_sz(map), PROT_READ | PROT_WRITE, >>>> >> >> > >> MAP_SHARED | MAP_ANONYMOUS, -1, 0); >>>> >> >> > >> if (map->mmaped == MAP_FAILED) { >>>> >> >> > >> err = -errno; >>>> >> >> > >> map->mmaped = NULL; >>>> >> >> > >> pr_warn("failed to alloc map '%s' content buffer: %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 supposed 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=1 bits_offset=0 nr_bits=8 encoding=UNKN >>>> >> >> > >> > [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR >>>> >> >> > >> > [3] TYPEDEF '__u8' type_id=2 >>>> >> >> > >> > [4] CONST '(anon)' type_id=3 >>>> >> >> > >> > [5] VOLATILE '(anon)' type_id=4 >>>> >> >> > >> > [6] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED >>>> >> >> > >> > [7] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) >>>> >> >> > >> > [8] TYPEDEF '__u16' type_id=7 >>>> >> >> > >> > [9] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED >>>> >> >> > >> > [10] TYPEDEF '__s32' type_id=9 >>>> >> >> > >> > [11] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) >>>> >> >> > >> > [12] TYPEDEF '__u32' type_id=11 >>>> >> >> > >> > [13] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED >>>> >> >> > >> > [14] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 >>>> >> >> > >> > encoding=(none) >>>> >> >> > >> > [15] TYPEDEF '__u64' type_id=14 >>>> >> >> > >> > [16] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) >>>> >> >> > >> > [17] INT 'long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED >>>> >> >> > >> > [18] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN >>>> >> >> > >> > [19] CONST '(anon)' type_id=18 >>>> >> >> > >> > [20] TYPEDEF '__be16' type_id=8 >>>> >> >> > >> > [21] TYPEDEF '__be32' type_id=12 >>>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=UNSIGNED size=4 vlen=31 >>>> >> >> > >> > 'BPF_MAP_TYPE_UNSPEC' val=0 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH' val=1 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY' val=2 >>>> >> >> > >> > 'BPF_MAP_TYPE_PROG_ARRAY' val=3 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=4 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_HASH' val=5 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_ARRAY' val=6 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK_TRACE' val=7 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_ARRAY' val=8 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_HASH' val=9 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=10 >>>> >> >> > >> > 'BPF_MAP_TYPE_LPM_TRIE' val=11 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=12 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH_OF_MAPS' val=13 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP' val=14 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKMAP' val=15 >>>> >> >> > >> > 'BPF_MAP_TYPE_CPUMAP' val=16 >>>> >> >> > >> > 'BPF_MAP_TYPE_XSKMAP' val=17 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKHASH' val=18 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_STORAGE' val=19 >>>> >> >> > >> > 'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=20 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=21 >>>> >> >> > >> > 'BPF_MAP_TYPE_QUEUE' val=22 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK' val=23 >>>> >> >> > >> > 'BPF_MAP_TYPE_SK_STORAGE' val=24 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP_HASH' val=25 >>>> >> >> > >> > 'BPF_MAP_TYPE_STRUCT_OPS' val=26 >>>> >> >> > >> > 'BPF_MAP_TYPE_RINGBUF' val=27 >>>> >> >> > >> > 'BPF_MAP_TYPE_INODE_STORAGE' val=28 >>>> >> >> > >> > 'BPF_MAP_TYPE_TASK_STORAGE' val=29 >>>> >> >> > >> > 'BPF_MAP_TYPE_BLOOM_FILTER' val=30 >>>> >> >> > >> > [23] UNION '(anon)' size=8 vlen=1 >>>> >> >> > >> > 'flow_keys' type_id=29 bits_offset=0 >>>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=56 vlen=13 >>>> >> >> > >> > 'nhoff' type_id=8 bits_offset=0 >>>> >> >> > >> > 'thoff' type_id=8 bits_offset=16 >>>> >> >> > >> > 'addr_proto' type_id=8 bits_offset=32 >>>> >> >> > >> > 'is_frag' type_id=3 bits_offset=48 >>>> >> >> > >> > 'is_first_frag' type_id=3 bits_offset=56 >>>> >> >> > >> > 'is_encap' type_id=3 bits_offset=64 >>>> >> >> > >> > 'ip_proto' type_id=3 bits_offset=72 >>>> >> >> > >> > 'n_proto' type_id=20 bits_offset=80 >>>> >> >> > >> > 'sport' type_id=20 bits_offset=96 >>>> >> >> > >> > 'dport' type_id=20 bits_offset=112 >>>> >> >> > >> > '(anon)' type_id=25 bits_offset=128 >>>> >> >> > >> > 'flags' type_id=12 bits_offset=384 >>>> >> >> > >> > 'flow_label' type_id=21 bits_offset=416 >>>> >> >> > >> > [25] UNION '(anon)' size=32 vlen=2 >>>> >> >> > >> > '(anon)' type_id=26 bits_offset=0 >>>> >> >> > >> > '(anon)' type_id=27 bits_offset=0 >>>> >> >> > >> > [26] STRUCT '(anon)' size=8 vlen=2 >>>> >> >> > >> > 'ipv4_src' type_id=21 bits_offset=0 >>>> >> >> > >> > 'ipv4_dst' type_id=21 bits_offset=32 >>>> >> >> > >> > [27] STRUCT '(anon)' size=32 vlen=2 >>>> >> >> > >> > 'ipv6_src' type_id=28 bits_offset=0 >>>> >> >> > >> > 'ipv6_dst' type_id=28 bits_offset=128 >>>> >> >> > >> > [28] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=4 >>>> >> >> > >> > [29] PTR '(anon)' type_id=24 >>>> >> >> > >> > [30] UNION '(anon)' size=8 vlen=1 >>>> >> >> > >> > 'sk' type_id=32 bits_offset=0 >>>> >> >> > >> > [31] STRUCT 'bpf_sock' size=80 vlen=14 >>>> >> >> > >> > 'bound_dev_if' type_id=12 bits_offset=0 >>>> >> >> > >> > 'family' type_id=12 bits_offset=32 >>>> >> >> > >> > 'type' type_id=12 bits_offset=64 >>>> >> >> > >> > 'protocol' type_id=12 bits_offset=96 >>>> >> >> > >> > 'mark' type_id=12 bits_offset=128 >>>> >> >> > >> > 'priority' type_id=12 bits_offset=160 >>>> >> >> > >> > 'src_ip4' type_id=12 bits_offset=192 >>>> >> >> > >> > 'src_ip6' type_id=28 bits_offset=224 >>>> >> >> > >> > 'src_port' type_id=12 bits_offset=352 >>>> >> >> > >> > 'dst_port' type_id=20 bits_offset=384 >>>> >> >> > >> > 'dst_ip4' type_id=12 bits_offset=416 >>>> >> >> > >> > 'dst_ip6' type_id=28 bits_offset=448 >>>> >> >> > >> > 'state' type_id=12 bits_offset=576 >>>> >> >> > >> > 'rx_queue_mapping' type_id=10 bits_offset=608 >>>> >> >> > >> > [32] PTR '(anon)' type_id=31 >>>> >> >> > >> > [33] STRUCT '__sk_buff' size=192 vlen=33 >>>> >> >> > >> > 'len' type_id=12 bits_offset=0 >>>> >> >> > >> > 'pkt_type' type_id=12 bits_offset=32 >>>> >> >> > >> > 'mark' type_id=12 bits_offset=64 >>>> >> >> > >> > 'queue_mapping' type_id=12 bits_offset=96 >>>> >> >> > >> > 'protocol' type_id=12 bits_offset=128 >>>> >> >> > >> > 'vlan_present' type_id=12 bits_offset=160 >>>> >> >> > >> > 'vlan_tci' type_id=12 bits_offset=192 >>>> >> >> > >> > 'vlan_proto' type_id=12 bits_offset=224 >>>> >> >> > >> > 'priority' type_id=12 bits_offset=256 >>>> >> >> > >> > 'ingress_ifindex' type_id=12 bits_offset=288 >>>> >> >> > >> > 'ifindex' type_id=12 bits_offset=320 >>>> >> >> > >> > 'tc_index' type_id=12 bits_offset=352 >>>> >> >> > >> > 'cb' type_id=34 bits_offset=384 >>>> >> >> > >> > 'hash' type_id=12 bits_offset=544 >>>> >> >> > >> > 'tc_classid' type_id=12 bits_offset=576 >>>> >> >> > >> > 'data' type_id=12 bits_offset=608 >>>> >> >> > >> > 'data_end' type_id=12 bits_offset=640 >>>> >> >> > >> > 'napi_id' type_id=12 bits_offset=672 >>>> >> >> > >> > 'family' type_id=12 bits_offset=704 >>>> >> >> > >> > 'remote_ip4' type_id=12 bits_offset=736 >>>> >> >> > >> > 'local_ip4' type_id=12 bits_offset=768 >>>> >> >> > >> > 'remote_ip6' type_id=28 bits_offset=800 >>>> >> >> > >> > 'local_ip6' type_id=28 bits_offset=928 >>>> >> >> > >> > 'remote_port' type_id=12 bits_offset=1056 >>>> >> >> > >> > 'local_port' type_id=12 bits_offset=1088 >>>> >> >> > >> > 'data_meta' type_id=12 bits_offset=1120 >>>> >> >> > >> > '(anon)' type_id=23 bits_offset=1152 >>>> >> >> > >> > 'tstamp' type_id=15 bits_offset=1216 >>>> >> >> > >> > 'wire_len' type_id=12 bits_offset=1280 >>>> >> >> > >> > 'gso_segs' type_id=12 bits_offset=1312 >>>> >> >> > >> > '(anon)' type_id=30 bits_offset=1344 >>>> >> >> > >> > 'gso_size' type_id=12 bits_offset=1408 >>>> >> >> > >> > 'hwtstamp' type_id=15 bits_offset=1472 >>>> >> >> > >> > [34] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=5 >>>> >> >> > >> > [35] CONST '(anon)' type_id=33 >>>> >> >> > >> > [36] PTR '(anon)' type_id=0 >>>> >> >> > >> > [37] STRUCT '(anon)' size=24 vlen=3 >>>> >> >> > >> > 'type' type_id=39 bits_offset=0 >>>> >> >> > >> > 'key' type_id=40 bits_offset=64 >>>> >> >> > >> > 'value' type_id=41 bits_offset=128 >>>> >> >> > >> > [38] ARRAY '(anon)' type_id=9 index_type_id=16 nr_elems=1 >>>> >> >> > >> > [39] PTR '(anon)' type_id=38 >>>> >> >> > >> > [40] PTR '(anon)' type_id=12 >>>> >> >> > >> > [41] PTR '(anon)' type_id=3 >>>> >> >> > >> > [42] ARRAY '(anon)' type_id=19 index_type_id=16 nr_elems=18 >>>> >> >> > >> > [43] CONST '(anon)' type_id=42 >>>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=36 vlen=2 >>>> >> >> > >> > '(anon)' type_id=36 >>>> >> >> > >> > '(anon)' type_id=46 >>>> >> >> > >> > [45] CONST '(anon)' type_id=0 >>>> >> >> > >> > [46] PTR '(anon)' type_id=45 >>>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1 >>>> >> >> > >> > 'sk' type_id=48 >>>> >> >> > >> > [48] PTR '(anon)' type_id=35 >>>> >> >> > >> > [49] VAR '_license' type_id=43, linkage=static >>>> >> >> > >> > [50] VAR 'is_allow_list' type_id=5, linkage=global >>>> >> >> > >> > [51] VAR 'sd_restrictif' type_id=37, linkage=global >>>> >> >> > >> > [52] FUNC 'sd_restrictif_i' type_id=47 linkage=global >>>> >> >> > >> > [53] FUNC 'sd_restrictif_e' type_id=47 linkage=global >>>> >> >> > >> > [54] FUNC 'restrict_network_interfaces_impl' type_id=47 linkage=static >>>> >> >> > >> > [55] DATASEC '.data' size=1 vlen=1 >>>> >> >> > >> > type_id=50 offset=0 size=1 (VAR 'is_allow_list') >>>> >> >> > >> > [56] DATASEC 'license' size=18 vlen=1 >>>> >> >> > >> > type_id=49 offset=0 size=18 (VAR '_license') >>>> >> >> > >> > [57] DATASEC '.maps' size=24 vlen=1 >>>> >> >> > >> > type_id=51 offset=0 size=24 (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-ifaces.bpf.unstripped.o >>>> >> >> > >> > format raw >>>> >> >> > >> > [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN >>>> >> >> > >> > [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR >>>> >> >> > >> > [3] TYPEDEF '__u8' type_id=2 >>>> >> >> > >> > [4] CONST '(anon)' type_id=3 >>>> >> >> > >> > [5] VOLATILE '(anon)' type_id=4 >>>> >> >> > >> > [6] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED >>>> >> >> > >> > [7] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none) >>>> >> >> > >> > [8] TYPEDEF '__u16' type_id=7 >>>> >> >> > >> > [9] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED >>>> >> >> > >> > [10] TYPEDEF '__s32' type_id=9 >>>> >> >> > >> > [11] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none) >>>> >> >> > >> > [12] TYPEDEF '__u32' type_id=11 >>>> >> >> > >> > [13] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED >>>> >> >> > >> > [14] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64 >>>> >> >> > >> > encoding=(none) >>>> >> >> > >> > [15] TYPEDEF '__u64' type_id=14 >>>> >> >> > >> > [16] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none) >>>> >> >> > >> > [17] INT 'long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED >>>> >> >> > >> > [18] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN >>>> >> >> > >> > [19] CONST '(anon)' type_id=18 >>>> >> >> > >> > [20] TYPEDEF '__be16' type_id=8 >>>> >> >> > >> > [21] TYPEDEF '__be32' type_id=12 >>>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=UNSIGNED size=4 vlen=31 >>>> >> >> > >> > 'BPF_MAP_TYPE_UNSPEC' val=0 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH' val=1 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY' val=2 >>>> >> >> > >> > 'BPF_MAP_TYPE_PROG_ARRAY' val=3 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=4 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_HASH' val=5 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_ARRAY' val=6 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK_TRACE' val=7 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_ARRAY' val=8 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_HASH' val=9 >>>> >> >> > >> > 'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=10 >>>> >> >> > >> > 'BPF_MAP_TYPE_LPM_TRIE' val=11 >>>> >> >> > >> > 'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=12 >>>> >> >> > >> > 'BPF_MAP_TYPE_HASH_OF_MAPS' val=13 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP' val=14 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKMAP' val=15 >>>> >> >> > >> > 'BPF_MAP_TYPE_CPUMAP' val=16 >>>> >> >> > >> > 'BPF_MAP_TYPE_XSKMAP' val=17 >>>> >> >> > >> > 'BPF_MAP_TYPE_SOCKHASH' val=18 >>>> >> >> > >> > 'BPF_MAP_TYPE_CGROUP_STORAGE' val=19 >>>> >> >> > >> > 'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=20 >>>> >> >> > >> > 'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=21 >>>> >> >> > >> > 'BPF_MAP_TYPE_QUEUE' val=22 >>>> >> >> > >> > 'BPF_MAP_TYPE_STACK' val=23 >>>> >> >> > >> > 'BPF_MAP_TYPE_SK_STORAGE' val=24 >>>> >> >> > >> > 'BPF_MAP_TYPE_DEVMAP_HASH' val=25 >>>> >> >> > >> > 'BPF_MAP_TYPE_STRUCT_OPS' val=26 >>>> >> >> > >> > 'BPF_MAP_TYPE_RINGBUF' val=27 >>>> >> >> > >> > 'BPF_MAP_TYPE_INODE_STORAGE' val=28 >>>> >> >> > >> > 'BPF_MAP_TYPE_TASK_STORAGE' val=29 >>>> >> >> > >> > 'BPF_MAP_TYPE_BLOOM_FILTER' val=30 >>>> >> >> > >> > [23] UNION '(anon)' size=8 vlen=1 >>>> >> >> > >> > 'flow_keys' type_id=29 bits_offset=0 >>>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=56 vlen=13 >>>> >> >> > >> > 'nhoff' type_id=8 bits_offset=0 >>>> >> >> > >> > 'thoff' type_id=8 bits_offset=16 >>>> >> >> > >> > 'addr_proto' type_id=8 bits_offset=32 >>>> >> >> > >> > 'is_frag' type_id=3 bits_offset=48 >>>> >> >> > >> > 'is_first_frag' type_id=3 bits_offset=56 >>>> >> >> > >> > 'is_encap' type_id=3 bits_offset=64 >>>> >> >> > >> > 'ip_proto' type_id=3 bits_offset=72 >>>> >> >> > >> > 'n_proto' type_id=20 bits_offset=80 >>>> >> >> > >> > 'sport' type_id=20 bits_offset=96 >>>> >> >> > >> > 'dport' type_id=20 bits_offset=112 >>>> >> >> > >> > '(anon)' type_id=25 bits_offset=128 >>>> >> >> > >> > 'flags' type_id=12 bits_offset=384 >>>> >> >> > >> > 'flow_label' type_id=21 bits_offset=416 >>>> >> >> > >> > [25] UNION '(anon)' size=32 vlen=2 >>>> >> >> > >> > '(anon)' type_id=26 bits_offset=0 >>>> >> >> > >> > '(anon)' type_id=27 bits_offset=0 >>>> >> >> > >> > [26] STRUCT '(anon)' size=8 vlen=2 >>>> >> >> > >> > 'ipv4_src' type_id=21 bits_offset=0 >>>> >> >> > >> > 'ipv4_dst' type_id=21 bits_offset=32 >>>> >> >> > >> > [27] STRUCT '(anon)' size=32 vlen=2 >>>> >> >> > >> > 'ipv6_src' type_id=28 bits_offset=0 >>>> >> >> > >> > 'ipv6_dst' type_id=28 bits_offset=128 >>>> >> >> > >> > [28] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=4 >>>> >> >> > >> > [29] PTR '(anon)' type_id=24 >>>> >> >> > >> > [30] UNION '(anon)' size=8 vlen=1 >>>> >> >> > >> > 'sk' type_id=32 bits_offset=0 >>>> >> >> > >> > [31] STRUCT 'bpf_sock' size=80 vlen=14 >>>> >> >> > >> > 'bound_dev_if' type_id=12 bits_offset=0 >>>> >> >> > >> > 'family' type_id=12 bits_offset=32 >>>> >> >> > >> > 'type' type_id=12 bits_offset=64 >>>> >> >> > >> > 'protocol' type_id=12 bits_offset=96 >>>> >> >> > >> > 'mark' type_id=12 bits_offset=128 >>>> >> >> > >> > 'priority' type_id=12 bits_offset=160 >>>> >> >> > >> > 'src_ip4' type_id=12 bits_offset=192 >>>> >> >> > >> > 'src_ip6' type_id=28 bits_offset=224 >>>> >> >> > >> > 'src_port' type_id=12 bits_offset=352 >>>> >> >> > >> > 'dst_port' type_id=20 bits_offset=384 >>>> >> >> > >> > 'dst_ip4' type_id=12 bits_offset=416 >>>> >> >> > >> > 'dst_ip6' type_id=28 bits_offset=448 >>>> >> >> > >> > 'state' type_id=12 bits_offset=576 >>>> >> >> > >> > 'rx_queue_mapping' type_id=10 bits_offset=608 >>>> >> >> > >> > [32] PTR '(anon)' type_id=31 >>>> >> >> > >> > [33] STRUCT '__sk_buff' size=192 vlen=33 >>>> >> >> > >> > 'len' type_id=12 bits_offset=0 >>>> >> >> > >> > 'pkt_type' type_id=12 bits_offset=32 >>>> >> >> > >> > 'mark' type_id=12 bits_offset=64 >>>> >> >> > >> > 'queue_mapping' type_id=12 bits_offset=96 >>>> >> >> > >> > 'protocol' type_id=12 bits_offset=128 >>>> >> >> > >> > 'vlan_present' type_id=12 bits_offset=160 >>>> >> >> > >> > 'vlan_tci' type_id=12 bits_offset=192 >>>> >> >> > >> > 'vlan_proto' type_id=12 bits_offset=224 >>>> >> >> > >> > 'priority' type_id=12 bits_offset=256 >>>> >> >> > >> > 'ingress_ifindex' type_id=12 bits_offset=288 >>>> >> >> > >> > 'ifindex' type_id=12 bits_offset=320 >>>> >> >> > >> > 'tc_index' type_id=12 bits_offset=352 >>>> >> >> > >> > 'cb' type_id=34 bits_offset=384 >>>> >> >> > >> > 'hash' type_id=12 bits_offset=544 >>>> >> >> > >> > 'tc_classid' type_id=12 bits_offset=576 >>>> >> >> > >> > 'data' type_id=12 bits_offset=608 >>>> >> >> > >> > 'data_end' type_id=12 bits_offset=640 >>>> >> >> > >> > 'napi_id' type_id=12 bits_offset=672 >>>> >> >> > >> > 'family' type_id=12 bits_offset=704 >>>> >> >> > >> > 'remote_ip4' type_id=12 bits_offset=736 >>>> >> >> > >> > 'local_ip4' type_id=12 bits_offset=768 >>>> >> >> > >> > 'remote_ip6' type_id=28 bits_offset=800 >>>> >> >> > >> > 'local_ip6' type_id=28 bits_offset=928 >>>> >> >> > >> > 'remote_port' type_id=12 bits_offset=1056 >>>> >> >> > >> > 'local_port' type_id=12 bits_offset=1088 >>>> >> >> > >> > 'data_meta' type_id=12 bits_offset=1120 >>>> >> >> > >> > '(anon)' type_id=23 bits_offset=1152 >>>> >> >> > >> > 'tstamp' type_id=15 bits_offset=1216 >>>> >> >> > >> > 'wire_len' type_id=12 bits_offset=1280 >>>> >> >> > >> > 'gso_segs' type_id=12 bits_offset=1312 >>>> >> >> > >> > '(anon)' type_id=30 bits_offset=1344 >>>> >> >> > >> > 'gso_size' type_id=12 bits_offset=1408 >>>> >> >> > >> > 'hwtstamp' type_id=15 bits_offset=1472 >>>> >> >> > >> > [34] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=5 >>>> >> >> > >> > [35] CONST '(anon)' type_id=33 >>>> >> >> > >> > [36] PTR '(anon)' type_id=0 >>>> >> >> > >> > [37] STRUCT '(anon)' size=24 vlen=3 >>>> >> >> > >> > 'type' type_id=39 bits_offset=0 >>>> >> >> > >> > 'key' type_id=40 bits_offset=64 >>>> >> >> > >> > 'value' type_id=41 bits_offset=128 >>>> >> >> > >> > [38] ARRAY '(anon)' type_id=9 index_type_id=16 nr_elems=1 >>>> >> >> > >> > [39] PTR '(anon)' type_id=38 >>>> >> >> > >> > [40] PTR '(anon)' type_id=12 >>>> >> >> > >> > [41] PTR '(anon)' type_id=3 >>>> >> >> > >> > [42] ARRAY '(anon)' type_id=19 index_type_id=16 nr_elems=18 >>>> >> >> > >> > [43] CONST '(anon)' type_id=42 >>>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=36 vlen=2 >>>> >> >> > >> > '(anon)' type_id=36 >>>> >> >> > >> > '(anon)' type_id=46 >>>> >> >> > >> > [45] CONST '(anon)' type_id=0 >>>> >> >> > >> > [46] PTR '(anon)' type_id=45 >>>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1 >>>> >> >> > >> > 'sk' type_id=48 >>>> >> >> > >> > [48] PTR '(anon)' type_id=35 >>>> >> >> > >> > [49] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1 >>>> >> >> > >> > 'sk' type_id=48 >>>> >> >> > >> > [50] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1 >>>> >> >> > >> > 'sk' type_id=48 >>>> >> >> > >> > [51] VAR '_license' type_id=43, linkage=static >>>> >> >> > >> > [52] VAR 'is_allow_list' type_id=5, linkage=global >>>> >> >> > >> > [53] VAR 'sd_restrictif' type_id=37, linkage=global >>>> >> >> > >> > [54] FUNC 'bpf_map_lookup_elem' type_id=44 linkage=global >>>> >> >> > >> > [55] FUNC 'sd_restrictif_i' type_id=47 linkage=global >>>> >> >> > >> > [56] FUNC 'sd_restrictif_e' type_id=49 linkage=global >>>> >> >> > >> > [57] FUNC 'restrict_network_interfaces_impl' type_id=50 linkage=static >>>> >> >> > >> > [58] DATASEC 'license' size=0 vlen=1 >>>> >> >> > >> > type_id=51 offset=0 size=18 (VAR '_license') >>>> >> >> > >> > [59] DATASEC '.maps' size=0 vlen=1 >>>> >> >> > >> > type_id=53 offset=0 size=24 (VAR 'sd_restrictif') >>>> >> >> > >> > [60] DATASEC '.data' size=0 vlen=1 >>>> >> >> > >> > type_id=52 offset=0 size=1 (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=1 bits_offset=0 nr_bits=8 encoding=UNKN >>>> >> >> > >> >> >>> [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR >>>> >> >> > >> >> >>> [3] TYPEDEF '__u8' type_id=2 >>>> >> >> > >> >> >>> [4] CONST '(anon)' type_id=3 >>>> >> >> > >> >> >> >>>> >> >> > >> >> >> [...]
