ip添加vlaninterface的strace日志_iplinkadd资源-CSDN文库

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pptx：1个

txt：1个

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tcp/ip

网络协议

网络

172 浏览量 2022-03-29 19:48:14 上传评论收藏 32KB ZIP 举报

在IT行业中，网络通信是至关重要的，而TCP/IP协议栈是网络通信的基础。在这个场景下，我们关注的是如何在Linux系统中通过`ip`命令来添加VLAN接口，并结合`strace`工具来分析其底层操作。VLAN（虚拟局域网）是一种将物理网络划分成多个逻辑网络的技术，它有助于提高网络管理和安全性。我们来看标题中的"ip添加vlan interface的strace日志"。`strace`是一个用于跟踪系统调用和信号的工具，它可以记录程序运行时的系统调用细节，帮助我们理解程序是如何与操作系统交互的。当我们在Linux环境中执行`ip link add link int0 name int0.1111 type vlan protocol 802.1Q id 1111`命令时，`strace`会捕获这个过程中的所有系统调用，包括打开文件、读写、网络通信等，这对于理解`ip`命令内部的工作机制非常有帮助。描述中提到的命令是创建一个新的VLAN接口。`ip link add link int0 name int0.1111`这部分表示在已存在的接口`int0`上创建一个新的子接口，命名为`int0.1111`。`type vlan`表明我们要创建的是一个VLAN接口，`protocol 802.1Q`指定了VLAN的实现标准，即802.1Q，这是最常用的VLAN标准。`id 1111`则是设置VLAN的ID，每个VLAN都有一个唯一的ID标识。标签"tcp/ip 网络协议网络"表明这与网络层的TCP/IP协议栈有关。在VLAN中，数据包会被加上一个VLAN标签，包含VLAN ID，以便在网络中识别和处理不同的流量。压缩包内的文件`ip link 添加vlan 分析.pptx`可能是一个关于这个主题的详细PPT演示文稿，它可能包含了更深入的理论解释、图形化示例以及步骤解析。而`ip-link-add.txt`可能是`strace`命令执行后的输出文件，里面记录了创建VLAN接口时的所有系统调用和返回值，这对于我们深入学习`ip`命令的内部工作流程至关重要。这个话题涉及Linux网络管理，特别是VLAN接口的配置和TCP/IP协议的应用。通过`strace`分析，我们可以理解`ip`命令如何与内核进行交互，从而创建和管理VLAN接口。这对于我们优化网络配置、排查网络问题以及深入理解网络协议栈的运作机制有着重要的实践意义。

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ip-link-add-vlan.zip （2个子文件）

ip link 添加vlan 分析.pptx 37KB

ip-link-add.txt 18KB

# ./strace ip link add link int0 name int0.1111 type vlan protocol 802.1Q id 1111 execve("/usr/sbin/ip", ["ip", "link", "add", "link", "int0", "name", "int0.1111", "type", "vlan", "protocol", "802.1Q", "id", "1111"], 0x7ffe2416b610 /* 24 vars */) = 0 brk(NULL) = 0x561440f78000 arch_prctl(0x3001 /* ARCH_??? */, 0x7ffed9131e50) = -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=24743, ...}) = 0 mmap(NULL, 24743, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fcdfb462000 close(3) = 0 openat(AT_FDCWD, "/lib64/libselinux.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\200z\0\0\0\0\0\0"..., 832) = 832 lseek(3, 157168, SEEK_SET) = 157168 read(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\1\0\0\300\4\0\0\0\30\0\0\0\0\0\0\0"..., 48) = 48 fstat(3, {st_mode=S_IFREG|0755, st_size=168536, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcdfb460000 lseek(3, 157168, SEEK_SET) = 157168 read(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\1\0\0\300\4\0\0\0\30\0\0\0\0\0\0\0"..., 48) = 48 mmap(NULL, 2266608, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfb013000 mprotect(0x7fcdfb03a000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfb239000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7fcdfb239000 mmap(0x7fcdfb23b000, 5616, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfb23b000 close(3) = 0 openat(AT_FDCWD, "/lib64/libbpf.so.0", 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\0000\223\0\0\0\0\0\0"..., 832) = 832 lseek(3, 233392, SEEK_SET) = 233392 read(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) = 32 fstat(3, {st_mode=S_IFREG|0755, st_size=248144, ...}) = 0 lseek(3, 233392, SEEK_SET) = 233392 read(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) = 32 mmap(NULL, 2336888, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfadd8000 mprotect(0x7fcdfae11000, 2097152, PROT_NONE) = 0 mmap(0x7fcdfb011000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x39000) = 0x7fcdfb011000 close(3) = 0 openat(AT_FDCWD, "/lib64/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\0203\0\0\0\0\0\0"..., 832) = 832 lseek(3, 93984, SEEK_SET) = 93984 read(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) = 32 fstat(3, {st_mode=S_IFREG|0755, st_size=104792, ...}) = 0 lseek(3, 93984, SEEK_SET) = 93984 read(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) = 32 mmap(NULL, 2195472, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfabbf000 mprotect(0x7fcdfabd6000, 2097152, PROT_NONE) = 0 mmap(0x7fcdfadd6000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17000) = 0x7fcdfadd6000 mmap(0x7fcdfadd7000, 16, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfadd7000 close(3) = 0 openat(AT_FDCWD, "/lib64/libmnl.so.0", 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\36\0\0\0\0\0\0"..., 832) = 832 lseek(3, 17064, SEEK_SET) = 17064 read(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) = 32 fstat(3, {st_mode=S_IFREG|0755, st_size=25600, ...}) = 0 lseek(3, 17064, SEEK_SET) = 17064 read(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) = 32 mmap(NULL, 2117640, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfa9b9000 mprotect(0x7fcdfa9be000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfabbd000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0x7fcdfabbd000 mmap(0x7fcdfabbe000, 8, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfabbe000 close(3) = 0 openat(AT_FDCWD, "/lib64/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\300\20\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=28856, ...}) = 0 mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfa7b5000 mprotect(0x7fcdfa7b8000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfa9b7000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7fcdfa9b7000 close(3) = 0 openat(AT_FDCWD, "/lib64/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\2405\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=3167872, ...}) = 0 lseek(3, 808, SEEK_SET) = 808 read(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) = 32 mmap(NULL, 3950400, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfa3f0000 mprotect(0x7fcdfa5ac000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfa7ab000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bb000) = 0x7fcdfa7ab000 mmap(0x7fcdfa7b1000, 14144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfa7b1000 close(3) = 0 openat(AT_FDCWD, "/lib64/libpcre2-8.so.0", 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\200#\0\0\0\0\0\0"..., 832) = 832 lseek(3, 532976, SEEK_SET) = 532976 read(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) = 32 fstat(3, {st_mode=S_IFREG|0755, st_size=543160, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcdfb45e000 lseek(3, 532976, SEEK_SET) = 532976 read(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) = 32 mmap(NULL, 2634280, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdfa16c000 mprotect(0x7fcdfa1ef000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfa3ee000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x82000) = 0x7fcdfa3ee000 close(3) = 0 openat(AT_FDCWD, "/lib64/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@'\0\0\0\0\0\0"..., 832) = 832 lseek(3, 88664, SEEK_SET) = 88664 read(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\1\0\0\300\4\0\0\0\30\0\0\0\0\0\0\0"..., 48) = 48 fstat(3, {st_mode=S_IFREG|0755, st_size=95416, ...}) = 0 lseek(3, 88664, SEEK_SET) = 88664 read(3, "\4\0\0\0 \0\0\0\5\0\0\0GNU\0\1\0\0\300\4\0\0\0\30\0\0\0\0\0\0\0"..., 48) = 48 mmap(NULL, 2187272, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdf9f55000 mprotect(0x7fcdf9f6b000, 2093056, PROT_NONE) = 0 mmap(0x7fcdfa16a000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) = 0x7fcdfa16a000 mmap(0x7fcdfa16b000, 8, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdfa16b000 close(3) = 0 openat(AT_FDCWD, "/lib64/libpthread.so.0", 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\240n\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=321552, ...}) = 0 mmap(NULL, 2225344, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fcdf9d35000 mprotect(0x7fcdf9d50000, 2093056, PROT_NONE) = 0 mmap(0x7fcdf9f4f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1a000) = 0x7fcdf9f4f000 mmap(0x7fcdf9f51000, 13504, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcdf9f51000 close(3) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fcdfb45c000 arch_prctl(ARCH_SET_FS, 0x7fcdfb45d000) = 0 mprote

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