================================================================================
```
selftests/bpf: Fix error: undeclared identifier 'NF_NAT_MANIP_SRC'
commit 472caa69183f("netfilter: nat: un-export nf_nat_used_tuple")
introduce NF_NAT_MANIP_SRC/DST enum in include/net/netfilter/nf_nat.h,
and commit b06b45e82b59("selftests/bpf: add tests for bpf_ct_set_nat_info
kfunc") use NF_NAT_MANIP_SRC/DST in test_bpf_nf.c.
In bpf kself-test config (tools/testing/selftests/bpf/config) nf_nat
is compiled as built-in, this issue occurs just if it is compiled as
module. We could use BPF CO-RE and ___suffix rule to avoid this.
How to reproduce the error:
$ make -C tools/testing/selftests/bpf/
...
CLNG-BPF [test_maps] test_bpf_nf.bpf.o
error: use of undeclared identifier 'NF_NAT_MANIP_SRC'
bpf_ct_set_nat_info(ct, &saddr, sport, NF_NAT_MANIP_SRC);
^
error: use of undeclared identifier 'NF_NAT_MANIP_DST'
bpf_ct_set_nat_info(ct, &daddr, dport, NF_NAT_MANIP_DST);
^
2 errors generated.
```
V2: use BPF CO-RE and ___suffix rule to avoid this error.
https://lore.kernel.org/lkml/tencent_E1424259BD97672AD1AF00A3468858065E08@qq.com/
V1: https://lore.kernel.org/lkml/tencent_29D7ABD1744417031AA1B52C914B61158E07@qq.com/
================================================================================
The motivation for this patch is to eliminate the compilation warning,
maybe one day we will compile the kernel with "-Werror -Wall", at which
point this compilation warning will turn into a compilation error, we
should fix this error in advance.
================================================================================
# TODO
https://lore.kernel.org/lkml/CAEf4BzY0dsog-_1v9Phskt2YzyavL_fNsSi2hUvGZboggDqM2w@mail.gmail.com/
It does break CI ([0]). We could use BPF CO-RE and ___suffix rule to
avoid this. But we can also say that selftests/bpf/config{,
to be used by bots that want to build BPF selftests.
[0] https://github.com/kernel-patches/bpf/actions/runs/3446651033/jobs/5752592868
```
Subject: Re: [PATCH bpf-next] selftests/bpf: Fix error undeclared identifier 'NF_NAT_MANIP_SRC'
Thank you all for your replies, my config:
$ grep NETFILTER config
CONFIG_NETFILTER=y
...
CONFIG_NETFILTER_XT_MARK=m
CONFIG_NETFILTER_XT_NAT=m
...
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
Link: https://github.com/kernel-patches/bpf/actions/runs/3446651033/jobs/5752592868
```
================================================================================
https://lore.kernel.org/lkml/20221111173855.108360-1-sj@kernel.org/
```
```
releases/gcc-10.1.0 OK
commit d14c547abd484d3540b692bb8048c4a6efe92c8b
Author: Martin Sebor
Date: Fri Aug 28 13:13:28 2020 -0600
Add -Wstringop-overread for reading past the end by string functions.
gcc-11.1.0
gcc/gcc/testsuite/gcc.dg/pragma-diag-10.c
================================================================================
enum nf_inet_hooks {
NF_INET_PRE_ROUTING = 0,
NF_INET_LOCAL_IN = 1,
NF_INET_FORWARD = 2,
NF_INET_LOCAL_OUT = 3,
NF_INET_POST_ROUTING = 4,
NF_INET_NUMHOOKS = 5,
NF_INET_INGRESS = 5,
};
enum nf_nat_manip_type {
NF_NAT_MANIP_SRC,
NF_NAT_MANIP_DST
};
================================================================================
```
docs/zh_CN: Update zh_CN/arm64/elf_hwcaps.rst
Add updates from the Documentation/arm64/elf_hwcaps.rst, and synchronize
the changes of commit 5d8505fd039c("arm64: Fix the documented event stream
frequency").
```
================================================================================
```
$ make -C tools/testing/selftests/bpf/
CLNG-BPF [test_maps] test_kfunc_dynptr_param.bpf.o
error: variable has incomplete type 'struct bpf_dynptr'
struct bpf_dynptr ptr;
^
bpf_helper_defs.h:42:8: note: forward declaration of 'struct bpf_dynptr'
struct bpf_dynptr;
^
error: variable has incomplete type 'struct bpf_dynptr'
struct bpf_dynptr ptr;
^
bpf_helper_defs.h:42:8: note: forward declaration of 'struct bpf_dynptr'
struct bpf_dynptr;
^
2 errors generated.
```
```
[rongtao@RT-PC linux]$ make -C tools/testing/selftests/bpf/
make: Entering directory '/home/sd/Git/linux/tools/testing/selftests/bpf'
CLNG-BPF [test_maps] test_kfunc_dynptr_param.bpf.o
progs/test_kfunc_dynptr_param.c:40:20: error: variable has incomplete type 'struct bpf_dynptr'
struct bpf_dynptr ptr;
^
/home/sd/Git/linux/tools/testing/selftests/bpf/tools/include/bpf/bpf_helper_defs.h:42:8: note: forward declaration of 'struct bpf_dynptr'
struct bpf_dynptr;
^
progs/test_kfunc_dynptr_param.c:69:20: error: variable has incomplete type 'struct bpf_dynptr'
struct bpf_dynptr ptr;
^
/home/sd/Git/linux/tools/testing/selftests/bpf/tools/include/bpf/bpf_helper_defs.h:42:8: note: forward declaration of 'struct bpf_dynptr'
struct bpf_dynptr;
^
2 errors generated.
```
enum nf_nat_manip_type