BPF / XDP：“bpftool批处理文件”返回“错误：读取批处理文件失败：不允许操作”

发布于 2025-01-16 20:20:50 字数 28921 浏览 3 评论 0原文

我有一个 docker 容器，上面加载了 XDP 程序。我还有一个供 bpftool 运行的批处理文件。当我运行 bpftool 批处理文件 tmp_bpftool.txt 时，出现错误：读取批处理文件失败：不允许操作。我是容器中的根。那么，可能是什么问题呢？

批处理文件如下：（地图59上有512个更新，地图58上有1个更新）

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： 以下是 strace bpftool 批处理文件 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\346\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \22\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360A\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3005\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\2005\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\"\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300#\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360A\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 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 +++

原文

I have a docker container with an XDP program loaded on it. I also have a batch file for the bpftool to run. When I run bpftool batch file tmp_bpftool.txt, I get Error: reading batch file failed: Operation not permitted. I am the root in the container. So, what could possibly be the problem?

The batch file is as below: (512 updates on map 59 and 1 update on map 58)

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

UPDATE:
Here is the output of the strace bpftool batch file command:

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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\346\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \22\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360A\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3005\0\0\0\0\0\0"..., 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 \"quot;..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\2005\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\"\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300#\0\0\0\0\0\0"..., 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, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360A\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029560, ...}) = 0
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\237\333t\347\262\27\320l\223\27*\202C\370T\177"..., 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 +++

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GRAY°灰色天空 2025-01-23 20:20:50

TL;DR：您的地图更新工作正常。该消息是 bpftool 中的错误。

Bpftool 会按照您的预期更新地图；然后，在处理完所有批处理文件后，它检查errno。如果 errno 为 0，则认为一切顺利，而且很好。如果没有，它会打印strerror(errno)，以便您可以看到处理文件时出了什么问题。

errno 的设置不是由于您的地图更新造成的。我不完全确定发生了什么事。该错误似乎是通过 commit cf9bf714523d（“工具：bpftool：允许非特权用户探测功能”），我们使用 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拾取它并对系统上支持或不支持的功能运行一些检查，即使我们不做任何探测。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 +++

这似乎来自 libcap 中的cap_get_bound()，其中返回的-1被取反并传递给errno，从而变成1，不允许操作。我不确定传递给 prctl() 的功能编号对应什么。

我不确定解决这个问题最干净的方法是什么。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，看看审稿人是否有更好的想法。如果您想自己发送补丁，请告诉我，否则我会在有时间时发送。

[编辑 2022 年 8 月] 已在 libcap 2.63 中修复以及在 bpf-next 中bpftool。

TL;DR: Your map update works fine. The message is a bug in bpftool.

Bpftool updates the maps just as you would expect; and then, after processing all the batch file, it checks errno. If errno is 0, it supposes that everything went fine, and it's good. If not, it prints strerror(errno) so you can see what went wrong when processing the file.

errno being set is not due to your map updates. I'm not entirely sure of what's happening to it. The bug was seemingly introduced with commit cf9bf714523d ("tools: bpftool: Allow unprivileged users to probe features"), where we manipulate process capabilities with libcap. Having a call to cap_get_proc() in feature.c is apparently enough for the executable to pick it up and to run some checks on capabilities that are supported, or not, on the system even if we're not doing any probing. I'm observing the following calls with 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 +++

This seems to be coming from cap_get_bound() in libcap, where the -1 returned is negated and passed to errno, thus becoming 1, Operation not permitted. I'm not sure what the capability numbers passed to prctl() correspond to.

I'm not sure what's the cleanest way to fix this. A simple workaround consists in resetting errno at the beginning of the main() function; we can submit that and see if the reviewers have a better idea. Let me know if you would like to send a patch yourself, otherwise I'll do it when I have a moment.

[EDIT August 2022] Fixed in libcap 2.63 and also in bpf-next for bpftool.

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