BPF / XDP: 'bpftool batch file' returns 'Error: reading batch file failed: Operation not permitted'
BPF / XDP: 'bpftool batch file' returns 'Error: reading batch file failed: Operation not permitted'
我有一个 docker 容器，上面加载了 XDP 程序。我还有一个 bpftool 到 运行 的批处理文件。当我 运行 bpftool batch file tmp_bpftool.txt 时，我得到 Error: reading batch file failed: Operation not permitted。我是容器中的根。那么，可能是什么问题？
批处理文件如下：（地图59更新512次，地图58更新1次）
map update id 59 key 0 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 1 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
.
.
.
map update id 59 key 255 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 0 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 1 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
.
. // All the way down to ... (512 entries for id 59)
.
map update id 59 key 254 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 255 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 58 key 10 89 0 4 00 00 00 00 value 0 0 00 00 00 00 00 00
更新：
这是 strace bpftool batch file 命令的输出：
execve("/usr/sbin/bpftool", ["bpftool", "batch", "file", "tmp_bpftool.txt"], 0x7fffdb7d3a98 /* 9 vars */) = 0
brk(NULL) = 0x558ee931c000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd7cb85610) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c4c69f000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]06[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=192032, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c69d000
mmap(NULL, 194944, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c66d000
mmap(0x7f9c4c67b000, 61440, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe000) = 0x7f9c4c67b000
mmap(0x7f9c4c68a000, 57344, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1d000) = 0x7f9c4c68a000
mmap(0x7f9c4c698000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2a000) = 0x7f9c4c698000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=] [=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=18816, ...}) = 0
mmap(NULL, 20752, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c667000
mmap(0x7f9c4c668000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f9c4c668000
mmap(0x7f9c4c66a000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c66a000
mmap(0x7f9c4c66b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c66b000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0A[=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
mmap(NULL, 2037344, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c475000
mmap(0x7f9c4c497000, 1540096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7f9c4c497000
mmap(0x7f9c4c60f000, 319488, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f9c4c60f000
mmap(0x7f9c4c65d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f9c4c65d000
mmap(0x7f9c4c663000, 13920, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c663000
close(3) = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c472000
arch_prctl(ARCH_SET_FS, 0x7f9c4c472740) = 0
mprotect(0x7f9c4c65d000, 16384, PROT_READ) = 0
mprotect(0x7f9c4c66b000, 4096, PROT_READ) = 0
mprotect(0x7f9c4c698000, 16384, PROT_READ) = 0
mprotect(0x558ee85e3000, 16384, PROT_READ) = 0
mprotect(0x7f9c4c6d0000, 4096, PROT_READ) = 0
munmap(0x7f9c4c69f000, 13993) = 0
openat(AT_FDCWD, "/dev/tty", O_RDWR|O_NONBLOCK) = 3
close(3) = 0
brk(NULL) = 0x558ee931c000
brk(0x558ee933d000) = 0x558ee933d000
getuid() = 0
getgid() = 0
geteuid() = 0
getegid() = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
ioctl(-1, TIOCGPGRP, 0x7ffd7cb85464) = -1 EBADF (Bad file descriptor)
sysinfo({uptime=1021, loads=[43680, 55104, 39616], totalram=8066469888, freeram=1033973760, sharedram=594358272, bufferram=135041024, totalswap=2147479552, freeswap=2147479552, procs=1331, totalhigh=0, freehigh=0, mem_unit=1}) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
uname({sysname="Linux", nodename="balancer", ...}) = 0
stat("/xdp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/xdp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getpid() = 177
getppid() = 174
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
openat(AT_FDCWD, "/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=494, ...}) = 0
read(3, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 494
read(3, "", 4096) = 0
close(3) = 0
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c4c69f000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]05[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=51832, ...}) = 0
mmap(NULL, 79672, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c45e000
mmap(0x7f9c4c461000, 28672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c461000
mmap(0x7f9c4c468000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xa000) = 0x7f9c4c468000
mmap(0x7f9c4c46a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7f9c4c46a000
mmap(0x7f9c4c46c000, 22328, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c46c000
close(3) = 0
mprotect(0x7f9c4c46a000, 4096, PROT_READ) = 0
munmap(0x7f9c4c69f000, 13993) = 0
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
lseek(3, 0, SEEK_CUR) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=976, ...}) = 0
read(3, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 976
close(3) = 0
getpid() = 177
getpgrp() = 174
ioctl(2, TIOCGPGRP, [174]) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
prlimit64(0, RLIMIT_NPROC, NULL, {rlim_cur=30509, rlim_max=30509}) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
openat(AT_FDCWD, "/usr/sbin/bpftool", O_RDONLY) = 3
stat("/usr/sbin/bpftool", {st_mode=S_IFREG|0755, st_size=1622, ...}) = 0
ioctl(3, TCGETS, 0x7ffd7cb853f0) = -1 ENOTTY (Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR) = 0
read(3, "#!/bin/bash\nfull_version=`uname "..., 80) = 80
lseek(3, 0, SEEK_SET) = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) = 0
fcntl(255, F_GETFD) = -1 EBADF (Bad file descriptor)
dup2(3, 255) = 255
close(3) = 0
fcntl(255, F_SETFD, FD_CLOEXEC) = 0
fcntl(255, F_GETFL) = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(255, {st_mode=S_IFREG|0755, st_size=1622, ...}) = 0
lseek(255, 0, SEEK_CUR) = 0
read(255, "#!/bin/bash\nfull_version=`uname "..., 1622) = 1622
pipe([3, 4]) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
lseek(255, -1586, SEEK_CUR) = 36
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f9c4c472a10) = 178
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
close(4) = 0
read(3, "5.13.0-35-generic\n", 128) = 18
read(3, "", 128) = 0
close(3) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=178, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 178
wait4(-1, 0x7ffd7cb847d0, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
read(255, "\n# First check for a fully quali"..., 1622) = 1586
pipe([3, 4]) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
lseek(255, -1484, SEEK_CUR) = 138
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f9c4c472a10) = 179
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
close(4) = 0
read(3, "bpftool\n", 128) = 8
read(3, "", 128) = 0
close(3) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=179, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 179
wait4(-1, 0x7ffd7cb84710, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
read(255, "if [ -f \"$this\" ]; then\n\texec \"$"..., 1622) = 1484
stat("/usr/lib/linux-tools/5.13.0-35-generic/bpftool", {st_mode=S_IFREG|0755, st_size=1650632, ...}) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
lseek(255, -1438, SEEK_CUR) = 184
execve("/usr/lib/linux-tools/5.13.0-35-generic/bpftool", ["/usr/lib/linux-tools/5.13.0-35-g"..., "batch", "file", "tmp_bpftool.txt"], 0x558ee9325940 /* 8 vars */) = 0
brk(NULL) = 0x556ccae20000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd8177b850) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c039c5000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libelf.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]05[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=109200, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c039c3000
mmap(NULL, 110976, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c039a7000
mmap(0x7f9c039aa000, 73728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c039aa000
mmap(0x7f9c039bc000, 20480, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7f9c039bc000
mmap(0x7f9c039c1000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f9c039c1000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0\"[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=108936, ...}) = 0
mmap(NULL, 110776, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c0398b000
mprotect(0x7f9c0398d000, 98304, PROT_NONE) = 0
mmap(0x7f9c0398d000, 69632, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f9c0398d000
mmap(0x7f9c0399e000, 24576, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13000) = 0x7f9c0399e000
mmap(0x7f9c039a5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f9c039a5000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libcap.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0#[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31120, ...}) = 0
mmap(NULL, 33112, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c03982000
mprotect(0x7f9c03984000, 20480, PROT_NONE) = 0
mmap(0x7f9c03984000, 12288, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f9c03984000
mmap(0x7f9c03987000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0x7f9c03987000
mmap(0x7f9c03989000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f9c03989000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0A[=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
mmap(NULL, 2037344, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c03790000
mmap(0x7f9c037b2000, 1540096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7f9c037b2000
mmap(0x7f9c0392a000, 319488, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f9c0392a000
mmap(0x7f9c03978000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f9c03978000
mmap(0x7f9c0397e000, 13920, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c0397e000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c0378e000
arch_prctl(ARCH_SET_FS, 0x7f9c0378eb80) = 0
mprotect(0x7f9c03978000, 16384, PROT_READ) = 0
mprotect(0x7f9c03989000, 4096, PROT_READ) = 0
mprotect(0x7f9c039a5000, 4096, PROT_READ) = 0
mprotect(0x7f9c039c1000, 4096, PROT_READ) = 0
mprotect(0x556cc8e27000, 12288, PROT_READ) = 0
mprotect(0x7f9c039f6000, 4096, PROT_READ) = 0
munmap(0x7f9c039c5000, 13993) = 0
prctl(PR_CAPBSET_READ, CAP_MAC_OVERRIDE) = 1
prctl(PR_CAPBSET_READ, 0x30 /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x28 /* CAP_??? */) = 0
prctl(PR_CAPBSET_READ, 0x2c /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x2a /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x29 /* CAP_??? */) = -1 EINVAL (Invalid argument)
brk(NULL) = 0x556ccae20000
brk(0x556ccae41000) = 0x556ccae41000
openat(AT_FDCWD, "tmp_bpftool.txt", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=70140, ...}) = 0
read(3, "map update id 15 key 0 0 00 00 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "00 00 00 00 00 00 value 10 0 0 1"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 value 10 0 0 1 10 89 0 4 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 10 89 0 4 00 00 00 00 00 00 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 0 1 10 89 0 4 00 00 00 00 00 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 00 value 10 0 0 1 10 89 0 4 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 00 00 00 00 00 value 10 0 0 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "d 15 key 210 0 00 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " \nmap update id 15 key 240 0 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "te id 15 key 14 1 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "1 00 00 00 00 00 00 value 10 0 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 value 10 0 0 1 10 89 0 4 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 0 0 1 10 89 0 4 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 00 value 10 0 0 1 10 89 0 4 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 1 00 00 00 00 00 00 value 10 0 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " id 15 key 194 1 00 00 00 00 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "00 \nmap update id 15 key 224 1 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 0 0 0 0 6 00 00 \nmap update id "..., 4096) = 508
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "", 4096) = 0
write(2, "Error: ", 7) = 7
write(2, "reading batch file failed: Opera"..., 50) = 50
write(2, "\n", 1) = 1
close(3) = 0
exit_group(-1) = ?
+++ exited with 255 +++
TL;DR：您的地图更新工作正常。该消息是 bpftool 中的错误。
Bpftool 按照您的预期更新地图；然后，在处理完所有批处理文件后，它会检查 errno。如果 errno 为 0，则表示一切正常，很好。如果不是，它会打印 strerror(errno) 以便您可以查看在处理文件时出了什么问题。
errno 设置不是由于您的地图更新。我不完全确定它发生了什么。该错误似乎是在 commit cf9bf714523d ("tools: bpftool: Allow unprivileged users to probe features") 中引入的，我们在其中使用 libcap 操纵进程功能。在 feature.c 中调用 cap_get_proc() 显然足以让可执行文件获取它并 运行 对系统支持或不支持的功能进行一些检查，即使我们'我们没有做任何探测。我正在使用 strace:
观察以下调用
# strace -e prctl ./bpftool batch file /tmp/batch
prctl(PR_CAPBSET_READ, CAP_MAC_OVERRIDE) = 1
prctl(PR_CAPBSET_READ, 0x30 /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, CAP_CHECKPOINT_RESTORE) = 1
prctl(PR_CAPBSET_READ, 0x2c /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x2a /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x29 /* CAP_??? */) = -1 EINVAL (Invalid argument)
Error: reading batch file failed: Operation not permitted
+++ exited with 255 +++
这好像是来自cap_get_bound() in libcap，其中返回的-1被取反并传递给errno，从而成为1、Operation not permitted。我不确定传递给 prctl() 的能力数字对应于什么。
我不确定解决此问题的最简洁方法是什么。一个简单的解决方法是在 main() 函数的开头重置 errno；我们可以提交它，看看审稿人是否有更好的主意。如果您想自己发送补丁，请告诉我，否则我会在有空的时候发送。
我有一个 docker 容器，上面加载了 XDP 程序。我还有一个 bpftool 到 运行 的批处理文件。当我 运行 bpftool batch file tmp_bpftool.txt 时，我得到 Error: reading batch file failed: Operation not permitted。我是容器中的根。那么，可能是什么问题？
批处理文件如下：（地图59更新512次，地图58更新1次）
map update id 59 key 0 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 1 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
.
.
.
map update id 59 key 255 0 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 0 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 1 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
.
. // All the way down to ... (512 entries for id 59)
.
map update id 59 key 254 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 59 key 255 1 00 00 00 00 00 00 value 10 0 0 1 10 89 0 4 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 4 00 00
map update id 58 key 10 89 0 4 00 00 00 00 value 0 0 00 00 00 00 00 00
更新：
这是 strace bpftool batch file 命令的输出：
execve("/usr/sbin/bpftool", ["bpftool", "batch", "file", "tmp_bpftool.txt"], 0x7fffdb7d3a98 /* 9 vars */) = 0
brk(NULL) = 0x558ee931c000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd7cb85610) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c4c69f000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libtinfo.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]06[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=192032, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c69d000
mmap(NULL, 194944, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c66d000
mmap(0x7f9c4c67b000, 61440, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe000) = 0x7f9c4c67b000
mmap(0x7f9c4c68a000, 57344, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1d000) = 0x7f9c4c68a000
mmap(0x7f9c4c698000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2a000) = 0x7f9c4c698000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=] [=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=18816, ...}) = 0
mmap(NULL, 20752, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c667000
mmap(0x7f9c4c668000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f9c4c668000
mmap(0x7f9c4c66a000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c66a000
mmap(0x7f9c4c66b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c66b000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0A[=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
mmap(NULL, 2037344, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c475000
mmap(0x7f9c4c497000, 1540096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7f9c4c497000
mmap(0x7f9c4c60f000, 319488, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f9c4c60f000
mmap(0x7f9c4c65d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f9c4c65d000
mmap(0x7f9c4c663000, 13920, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c663000
close(3) = 0
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c472000
arch_prctl(ARCH_SET_FS, 0x7f9c4c472740) = 0
mprotect(0x7f9c4c65d000, 16384, PROT_READ) = 0
mprotect(0x7f9c4c66b000, 4096, PROT_READ) = 0
mprotect(0x7f9c4c698000, 16384, PROT_READ) = 0
mprotect(0x558ee85e3000, 16384, PROT_READ) = 0
mprotect(0x7f9c4c6d0000, 4096, PROT_READ) = 0
munmap(0x7f9c4c69f000, 13993) = 0
openat(AT_FDCWD, "/dev/tty", O_RDWR|O_NONBLOCK) = 3
close(3) = 0
brk(NULL) = 0x558ee931c000
brk(0x558ee933d000) = 0x558ee933d000
getuid() = 0
getgid() = 0
geteuid() = 0
getegid() = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
ioctl(-1, TIOCGPGRP, 0x7ffd7cb85464) = -1 EBADF (Bad file descriptor)
sysinfo({uptime=1021, loads=[43680, 55104, 39616], totalram=8066469888, freeram=1033973760, sharedram=594358272, bufferram=135041024, totalswap=2147479552, freeswap=2147479552, procs=1331, totalhigh=0, freehigh=0, mem_unit=1}) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
uname({sysname="Linux", nodename="balancer", ...}) = 0
stat("/xdp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/xdp", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getpid() = 177
getppid() = 174
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
close(3) = 0
openat(AT_FDCWD, "/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=494, ...}) = 0
read(3, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 494
read(3, "", 4096) = 0
close(3) = 0
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c4c69f000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]05[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=51832, ...}) = 0
mmap(NULL, 79672, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c4c45e000
mmap(0x7f9c4c461000, 28672, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c4c461000
mmap(0x7f9c4c468000, 8192, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xa000) = 0x7f9c4c468000
mmap(0x7f9c4c46a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xb000) = 0x7f9c4c46a000
mmap(0x7f9c4c46c000, 22328, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c4c46c000
close(3) = 0
mprotect(0x7f9c4c46a000, 4096, PROT_READ) = 0
munmap(0x7f9c4c69f000, 13993) = 0
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
lseek(3, 0, SEEK_CUR) = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=976, ...}) = 0
read(3, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 976
close(3) = 0
getpid() = 177
getpgrp() = 174
ioctl(2, TIOCGPGRP, [174]) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
prlimit64(0, RLIMIT_NPROC, NULL, {rlim_cur=30509, rlim_max=30509}) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
openat(AT_FDCWD, "/usr/sbin/bpftool", O_RDONLY) = 3
stat("/usr/sbin/bpftool", {st_mode=S_IFREG|0755, st_size=1622, ...}) = 0
ioctl(3, TCGETS, 0x7ffd7cb853f0) = -1 ENOTTY (Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR) = 0
read(3, "#!/bin/bash\nfull_version=`uname "..., 80) = 80
lseek(3, 0, SEEK_SET) = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) = 0
fcntl(255, F_GETFD) = -1 EBADF (Bad file descriptor)
dup2(3, 255) = 255
close(3) = 0
fcntl(255, F_SETFD, FD_CLOEXEC) = 0
fcntl(255, F_GETFL) = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fstat(255, {st_mode=S_IFREG|0755, st_size=1622, ...}) = 0
lseek(255, 0, SEEK_CUR) = 0
read(255, "#!/bin/bash\nfull_version=`uname "..., 1622) = 1622
pipe([3, 4]) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
lseek(255, -1586, SEEK_CUR) = 36
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f9c4c472a10) = 178
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
close(4) = 0
read(3, "5.13.0-35-generic\n", 128) = 18
read(3, "", 128) = 0
close(3) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=178, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 178
wait4(-1, 0x7ffd7cb847d0, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
read(255, "\n# First check for a fully quali"..., 1622) = 1586
pipe([3, 4]) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
lseek(255, -1484, SEEK_CUR) = 138
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f9c4c472a10) = 179
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
close(4) = 0
read(3, "bpftool\n", 128) = 8
read(3, "", 128) = 0
close(3) = 0
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=179, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 179
wait4(-1, 0x7ffd7cb84710, WNOHANG, NULL) = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]}) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8526480, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
read(255, "if [ -f \"$this\" ]; then\n\texec \"$"..., 1622) = 1484
stat("/usr/lib/linux-tools/5.13.0-35-generic/bpftool", {st_mode=S_IFREG|0755, st_size=1650632, ...}) = 0
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, {sa_handler=0x558ee8529aa0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f9c4c4b80c0}, 8) = 0
lseek(255, -1438, SEEK_CUR) = 184
execve("/usr/lib/linux-tools/5.13.0-35-generic/bpftool", ["/usr/lib/linux-tools/5.13.0-35-g"..., "batch", "file", "tmp_bpftool.txt"], 0x558ee9325940 /* 8 vars */) = 0
brk(NULL) = 0x556ccae20000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd8177b850) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=13993, ...}) = 0
mmap(NULL, 13993, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9c039c5000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libelf.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]05[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=109200, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c039c3000
mmap(NULL, 110976, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c039a7000
mmap(0x7f9c039aa000, 73728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7f9c039aa000
mmap(0x7f9c039bc000, 20480, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7f9c039bc000
mmap(0x7f9c039c1000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f9c039c1000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0\"[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=108936, ...}) = 0
mmap(NULL, 110776, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c0398b000
mprotect(0x7f9c0398d000, 98304, PROT_NONE) = 0
mmap(0x7f9c0398d000, 69632, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f9c0398d000
mmap(0x7f9c0399e000, 24576, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13000) = 0x7f9c0399e000
mmap(0x7f9c039a5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f9c039a5000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libcap.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0#[=11=][=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31120, ...}) = 0
mmap(NULL, 33112, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c03982000
mprotect(0x7f9c03984000, 20480, PROT_NONE) = 0
mmap(0x7f9c03984000, 12288, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f9c03984000
mmap(0x7f9c03987000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) = 0x7f9c03987000
mmap(0x7f9c03989000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7f9c03989000
close(3) = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]>[=11=][=11=][=11=][=11=]0A[=11=][=11=][=11=][=11=][=11=]"..., 832) = 832
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]@[=11=][=11=][=11=][=11=][=11=][=11=][=11=]"..., 784, 64) = 784
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=][=11=][=11=]0[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]", 32, 848) = 32
pread64(3, "[=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=][=11=]GNU[=11=]73t720l3*2C0T7"..., 68, 880) = 68
mmap(NULL, 2037344, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f9c03790000
mmap(0x7f9c037b2000, 1540096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7f9c037b2000
mmap(0x7f9c0392a000, 319488, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f9c0392a000
mmap(0x7f9c03978000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f9c03978000
mmap(0x7f9c0397e000, 13920, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f9c0397e000
close(3) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9c0378e000
arch_prctl(ARCH_SET_FS, 0x7f9c0378eb80) = 0
mprotect(0x7f9c03978000, 16384, PROT_READ) = 0
mprotect(0x7f9c03989000, 4096, PROT_READ) = 0
mprotect(0x7f9c039a5000, 4096, PROT_READ) = 0
mprotect(0x7f9c039c1000, 4096, PROT_READ) = 0
mprotect(0x556cc8e27000, 12288, PROT_READ) = 0
mprotect(0x7f9c039f6000, 4096, PROT_READ) = 0
munmap(0x7f9c039c5000, 13993) = 0
prctl(PR_CAPBSET_READ, CAP_MAC_OVERRIDE) = 1
prctl(PR_CAPBSET_READ, 0x30 /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x28 /* CAP_??? */) = 0
prctl(PR_CAPBSET_READ, 0x2c /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x2a /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x29 /* CAP_??? */) = -1 EINVAL (Invalid argument)
brk(NULL) = 0x556ccae20000
brk(0x556ccae41000) = 0x556ccae41000
openat(AT_FDCWD, "tmp_bpftool.txt", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=70140, ...}) = 0
read(3, "map update id 15 key 0 0 00 00 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "00 00 00 00 00 00 value 10 0 0 1"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 value 10 0 0 1 10 89 0 4 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 10 89 0 4 00 00 00 00 00 00 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 0 1 10 89 0 4 00 00 00 00 00 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 00 value 10 0 0 1 10 89 0 4 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 00 00 00 00 00 value 10 0 0 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "d 15 key 210 0 00 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " \nmap update id 15 key 240 0 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "te id 15 key 14 1 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "1 00 00 00 00 00 00 value 10 0 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 value 10 0 0 1 10 89 0 4 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "0 0 0 1 10 89 0 4 00 00 00 00 00"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 00 00 value 10 0 0 1 10 89 0 4 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 1 00 00 00 00 00 00 value 10 0 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " id 15 key 194 1 00 00 00 00 00 "..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "00 \nmap update id 15 key 224 1 0"..., 4096) = 4096
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, " 0 0 0 0 6 00 00 \nmap update id "..., 4096) = 508
bpf(BPF_MAP_GET_FD_BY_ID, {map_id=15, next_id=0, open_flags=0}, 120) = 4
bpf(BPF_OBJ_GET_INFO_BY_FD, {info={bpf_fd=4, info_len=80, info=0x7ffd81753730}}, 120) = 0
bpf(BPF_MAP_UPDATE_ELEM, {map_fd=4, key=0x556ccae21490, value=0x556ccae214b0, flags=BPF_ANY}, 120) = 0
close(4) = 0
read(3, "", 4096) = 0
write(2, "Error: ", 7) = 7
write(2, "reading batch file failed: Opera"..., 50) = 50
write(2, "\n", 1) = 1
close(3) = 0
exit_group(-1) = ?
+++ exited with 255 +++
TL;DR：您的地图更新工作正常。该消息是 bpftool 中的错误。
Bpftool 按照您的预期更新地图；然后，在处理完所有批处理文件后，它会检查 errno。如果 errno 为 0，则表示一切正常，很好。如果不是，它会打印 strerror(errno) 以便您可以查看在处理文件时出了什么问题。
errno 设置不是由于您的地图更新。我不完全确定它发生了什么。该错误似乎是在 commit cf9bf714523d ("tools: bpftool: Allow unprivileged users to probe features") 中引入的，我们在其中使用 libcap 操纵进程功能。在 feature.c 中调用 cap_get_proc() 显然足以让可执行文件获取它并 运行 对系统支持或不支持的功能进行一些检查，即使我们'我们没有做任何探测。我正在使用 strace:
# strace -e prctl ./bpftool batch file /tmp/batch
prctl(PR_CAPBSET_READ, CAP_MAC_OVERRIDE) = 1
prctl(PR_CAPBSET_READ, 0x30 /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, CAP_CHECKPOINT_RESTORE) = 1
prctl(PR_CAPBSET_READ, 0x2c /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x2a /* CAP_??? */) = -1 EINVAL (Invalid argument)
prctl(PR_CAPBSET_READ, 0x29 /* CAP_??? */) = -1 EINVAL (Invalid argument)
Error: reading batch file failed: Operation not permitted
+++ exited with 255 +++
这好像是来自cap_get_bound() in libcap，其中返回的-1被取反并传递给errno，从而成为1、Operation not permitted。我不确定传递给 prctl() 的能力数字对应于什么。
我不确定解决此问题的最简洁方法是什么。一个简单的解决方法是在 main() 函数的开头重置 errno；我们可以提交它，看看审稿人是否有更好的主意。如果您想自己发送补丁，请告诉我，否则我会在有空的时候发送。