linux5.3.0编译运行LINUX内核源码中的BPF示例代码

apt-get install linux-image-5.3.0-70-generic
apt-get install linux-headers-5.3.0-70-generic
apt-get install linux-source-5.3.0

cd /data/linux-source-5.3.0/tools/bpf/
make oldconfig && make prepare
make scripts
make M=samples/bpf

samples/bpf/bpf_load.c: In function ‘load_and_attach’:
samples/bpf/bpf_load.c:108:15: error: ‘BPF_PROG_TYPE_RAW_TRACEPOINT’ undeclared (first use in this function); did you mean ‘BPF_PROG_TYPE_TRACEPOINT’?
   prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT;
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
               BPF_PROG_TYPE_TRACEPOINT
samples/bpf/bpf_load.c:122:15: error: ‘BPF_PROG_TYPE_SK_MSG’ undeclared (first use in this function); did you mean ‘BPF_PROG_TYPE_SK_SKB’?
   prog_type = BPF_PROG_TYPE_SK_MSG;
               ^~~~~~~~~~~~~~~~~~~~
               BPF_PROG_TYPE_SK_SKB
scripts/Makefile.host:107: recipe for target 'samples/bpf/bpf_load.o' failed
make[1]: *** [samples/bpf/bpf_load.o] Error 1
Makefile:1667: recipe for target '_module_samples/bpf' failed
make: *** [_module_samples/bpf] Error 2
root@VM-74-51-ubuntu:/data/linux-source-5.3.0# ls samples/bpf/

enum bpf_prog_type {
        BPF_PROG_TYPE_UNSPEC,
        BPF_PROG_TYPE_SOCKET_FILTER,
        BPF_PROG_TYPE_KPROBE,
        BPF_PROG_TYPE_SCHED_CLS,
        BPF_PROG_TYPE_SCHED_ACT,
        BPF_PROG_TYPE_TRACEPOINT,
        BPF_PROG_TYPE_XDP,
        BPF_PROG_TYPE_PERF_EVENT,
        BPF_PROG_TYPE_CGROUP_SKB,
        BPF_PROG_TYPE_CGROUP_SOCK,
        BPF_PROG_TYPE_LWT_IN,
        BPF_PROG_TYPE_LWT_OUT,
        BPF_PROG_TYPE_LWT_XMIT,
        BPF_PROG_TYPE_SOCK_OPS,
        BPF_PROG_TYPE_SK_SKB,
        BPF_PROG_TYPE_CGROUP_DEVICE,
        BPF_PROG_TYPE_SK_MSG,
        BPF_PROG_TYPE_RAW_TRACEPOINT,
        BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
        BPF_PROG_TYPE_LWT_SEG6LOCAL,
        BPF_PROG_TYPE_LIRC_MODE2,
        BPF_PROG_TYPE_SK_REUSEPORT,
        BPF_PROG_TYPE_FLOW_DISSECTOR,
        BPF_PROG_TYPE_CGROUP_SYSCTL,
        BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
        BPF_PROG_TYPE_CGROUP_SOCKOPT,
};

  LINK     libbpf.so.0.0.4
  LINK     test_libbpf
  HOSTCC  samples/bpf/test_lru_dist
  HOSTCC  samples/bpf/sock_example
In file included from samples/bpf/sock_example.c:27:0:
/usr/include/linux/ip.h:102:2: error: unknown type name ‘__sum16’
  __sum16 check;
  ^~~~~~~
scripts/Makefile.host:90: recipe for target 'samples/bpf/sock_example' failed
make[1]: *** [samples/bpf/sock_example] Error 1
Makefile:1667: recipe for target '_module_samples/bpf' failed
make: *** [_module_samples/bpf] Error 2
root@VM-74-51-ubuntu:/data/linux-source-5.3.0# 

vim tools/include/linux/types.h

typedef __u16 __bitwise __le16;
typedef __u16 __bitwise __be16;
typedef __u32 __bitwise __le32;
typedef __u32 __bitwise __be32;
typedef __u64 __bitwise __le64;
typedef __u64 __bitwise __be64;

typedef __u16 __bitwise __sum16;  //这里加入
typedef __u32 __bitwise __wsum;   //这里加入

typedef struct {
        int counter;
} atomic_t;

/tools/perf/perf-sys.h: In function ‘sys_perf_event_open’:
./tools/perf/perf-sys.h:68:15: error: ‘test_attr__enabled’ undeclared (first use in this function)
  if (unlikely(test_attr__enabled))
               ^
./tools/include/linux/compiler.h:74:43: note: in definition of macro ‘unlikely’
 # define unlikely(x)  __builtin_expect(!!(x), 0)
                                           ^
./tools/perf/perf-sys.h:68:15: note: each undeclared identifier is reported only once for each function it appears in
  if (unlikely(test_attr__enabled))
               ^
./tools/include/linux/compiler.h:74:43: note: in definition of macro ‘unlikely’
 # define unlikely(x)  __builtin_expect(!!(x), 0)
                                           ^
In file included from samples/bpf/bpf_load.c:28:0:
./tools/perf/perf-sys.h:69:3: warning: implicit declaration of function ‘test_attr__open’ [-Wimplicit-function-declaration]
   test_attr__open(attr, pid, cpu, fd, group_fd, flags);
   ^~~~~~~~~~~~~~~
scripts/Makefile.host:107: recipe for target 'samples/bpf/bpf_load.o' failed
make[1]: *** [samples/bpf/bpf_load.o] Error 1
Makefile:1667: recipe for target '_module_samples/bpf' failed
make: *** [_module_samples/bpf] Error 2

vim ./tools/perf/perf-sys.h

static inline int
sys_perf_event_open(struct perf_event_attr *attr,
                      pid_t pid, int cpu, int group_fd,
                      unsigned long flags)
{
        int fd;

        fd = syscall(__NR_perf_event_open, attr, pid, cpu,
                     group_fd, flags);
// 注视掉以下代码
// #ifdef HAVE_ATTR_TEST
//      if (unlikely(test_attr__enabled)) // 
//              test_attr__open(attr, pid, cpu, fd, group_fd, flags);
// #endif
        return fd;
}

root@VM-74-51-ubuntu:/data/linux-source-5.3.0/tools/bpf# make
  BISON    bpf_exp.yacc.c
  CC       bpf_exp.yacc.o
  FLEX     bpf_exp.lex.c
/bin/sh: 1: flex: not found
Makefile:54: recipe for target 'bpf_exp.lex.c' failed
make: *** [bpf_exp.lex.c] Error 127
root@VM-74-51-ubuntu:/data/linux-source-5.3.0/tools/bpf# 

static inline int
sys_perf_event_open(struct perf_event_attr *attr,
                      pid_t pid, int cpu, int group_fd,
                      unsigned long flags)
{
        int fd;

        fd = syscall(__NR_perf_event_open, attr, pid, cpu,
                     group_fd, flags);

// #ifdef HAVE_ATTR_TEST
//      if (unlikely(test_attr__enabled))
//              test_attr__open(attr, pid, cpu, fd, group_fd, flags);
// #endif
        return fd;
}

root@VM-74-51-ubuntu:/data/linux-source-5.3.0/tools/bpf# make
  BISON    bpf_exp.yacc.c
  CC       bpf_exp.yacc.o
  FLEX     bpf_exp.lex.c
  ......
Auto-detecting system features:
...                        libelf: [ OFF ]
...                           bpf: [ on  ]

No libelf found
Makefile:269: recipe for target 'elfdep' failed
make[2]: *** [elfdep] Error 1
Makefile:30: recipe for target '/data/linux-source-5.3.0/tools/lib/bpf/libbpf.a' failed
make[1]: *** [/data/linux-source-5.3.0/tools/lib/bpf/libbpf.a] Error 2
Makefile:99: recipe for target 'bpftool' failed
make: *** [bpftool] Error 2
root@VM-74-51-ubuntu:/data/linux-source-5.3.0/tools/bpf# 

apt-get install libelf-dev