Apply for bugfix: tcp* BPF_SK_LOOKUP undeclared failed · Pull Request !13 · src-openEuler/bcc

Refer to upstream community：https://github.com/iovisor/bcc/issues/3255

**When older bcc and newer kernel. bcc internal bpf.h does not define BPF_SK_LOOKUP but newer kernel header file uses BPF_SK_LOOKUP. **

**error info：** 
[root@k8s-node2 tools]# ./tcpaccept 
In file included from /virtual/main.c:15:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/sock.h:46:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/netdevice.h:38:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/net_namespace.h:36:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/netns/bpf.h:9:
/lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf-netns.h:21:7: error: use of undeclared identifier 'BPF_SK_LOOKUP'; did you mean 'BPF_F_LOCK'?
        case BPF_SK_LOOKUP:
             ^~~~~~~~~~~~~
             BPF_F_LOCK
/virtual/include/bcc/bpf.h:360:2: note: 'BPF_F_LOCK' declared here
        BPF_F_LOCK      = 4, /* spin_lock-ed map_lookup/map_update */
        ^
In file included from /virtual/main.c:15:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/sock.h:46:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/netdevice.h:42:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/netprio_cgroup.h:11:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/cgroup.h:28:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/cgroup-defs.h:22:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf-cgroup.h:5:
/lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf.h:1289:12: warning: declaration of 'union bpf_iter_link_info' will not be visible outside of this function [-Wvisibility]
                                        union bpf_iter_link_info *linfo,
                                              ^
1 warning and 1 error generated.
Traceback (most recent call last):
  File "./tcpaccept", line 240, in <module>
    b = BPF(text=bpf_text)
  File "/usr/lib/python3.8/site-packages/bpfcc/__init__.py", line 358, in __init__
    raise Exception("Failed to compile BPF module %s" % (src_file or "<text>"))
Exception: Failed to compile BPF module <text>

**ENV：** 
[root@k8s-node2 tools]# rpm -qa | grep bcc
bcc-tools-0.15.0-2.oe1.aarch64
bcc-0.15.0-2.oe1.aarch64
[root@k8s-node2 tools]# uname -r
5.10.0-4.17.0.28.oe1.aarch64

**Effect by modified：** 
[root@k8s-node2 tools]# ./tcpaccept 
In file included from /virtual/main.c:16:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/sock.h:46:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/netdevice.h:38:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/net_namespace.h:36:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/netns/bpf.h:9:
/lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf-netns.h:21:7: warning: case value not in enumerated type 'enum bpf_attach_type' [-Wswitch]
        case BPF_SK_LOOKUP:
             ^
/virtual/main.c:15:23: note: expanded from macro 'BPF_SK_LOOKUP'
#define BPF_SK_LOOKUP 36
                      ^
In file included from /virtual/main.c:16:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/sock.h:46:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/netdevice.h:42:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/net/netprio_cgroup.h:11:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/cgroup.h:28:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/cgroup-defs.h:22:
In file included from /lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf-cgroup.h:5:
/lib/modules/5.10.0-4.17.0.28.oe1.aarch64/build/include/linux/bpf.h:1289:12: warning: declaration of 'union bpf_iter_link_info' will not be visible outside of this function [-Wvisibility]
                                        union bpf_iter_link_info *linfo,
                                              ^
2 warnings generated.
PID     COMM         IP RADDR            RPORT LADDR            LPORT

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