libipvs.h:14:23: error: net/ip_vs.h: No such file or directory

今天在安装ipvsadm时遇到了错误（参考http://7567567.blog.51cto.com/706378/578289/）。

操作步骤如下：

ln -s /usr/src/kernels/2.6.18-164.el5-i686/ /usr/src/linux

cd ipvsadm-1.24 

[root@ser6-51 ipvsadm-1.24]# make

报错：

<span style="background-color: rgb(255, 255, 255);"><span style="font-size: 14px;"><span style="font-family:Microsoft YaHei;">[root@ser6-51 ipvsadm-1.24]# makemake -C libipvsmake[1]: Entering directory `/download/ipvsadm-1.24/libipvs'gcc -Wall -Wunused -Wstrict-prototypes -g -O2 -I/usr/src/linux/include  -DHAVE_NET_IP_VS_H -c -o libipvs.o libipvs.cIn file included from libipvs.c:23:libipvs.h:14:23: error: net/ip_vs.h: No such file or directoryIn file included from libipvs.c:23:libipvs.h:119: error: expected ‘)’ before ‘fwmark’libipvs.c:27: error: field ‘svc’ has incomplete typelibipvs.c:28: error: field ‘dest’ has incomplete typelibipvs.c: In function ‘ipvs_init’:libipvs.c:40: error: invalid application of ‘sizeof’ to incomplete type ‘struct ip_vs_getinfo’ libipvs.c:44: error: ‘IP_VS_SO_GET_INFO’ undeclared (first use in this function)libipvs.c:44: error: (Each undeclared identifier is reported only oncelibipvs.c:44: error: for each function it appears in.)libipvs.c: In function ‘ipvs_getinfo’:libipvs.c:56: error: invalid application of ‘sizeof’ to incomplete type ‘struct ip_vs_getinfo’ libipvs.c:57: error: ‘IP_VS_SO_GET_INFO’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_version’:libipvs.c:64: error: invalid use of undefined type ‘struct ip_vs_getinfo’libipvs.c: In function ‘ipvs_flush’:libipvs.c:70: error: ‘IP_VS_SO_SET_FLUSH’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_add_service’:libipvs.c:79: error: ‘IP_VS_SO_SET_ADD’ undeclared (first use in this function)libipvs.c:79: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_update_service’:libipvs.c:87: error: ‘IP_VS_SO_SET_EDIT’ undeclared (first use in this function)libipvs.c:87: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_del_service’:libipvs.c:95: error: ‘IP_VS_SO_SET_DEL’ undeclared (first use in this function)libipvs.c:95: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_zero_service’:libipvs.c:103: error: ‘IP_VS_SO_SET_ZERO’ undeclared (first use in this function)libipvs.c:103: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_add_dest’:libipvs.c:109: error: dereferencing pointer to incomplete typelibipvs.c:109: error: dereferencing pointer to incomplete typelibipvs.c:112: error: ‘IP_VS_SO_SET_ADDDEST’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_update_dest’:libipvs.c:119: error: dereferencing pointer to incomplete typelibipvs.c:119: error: dereferencing pointer to incomplete typelibipvs.c:122: error: ‘IP_VS_SO_SET_EDITDEST’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_del_dest’:libipvs.c:129: error: dereferencing pointer to incomplete typelibipvs.c:129: error: dereferencing pointer to incomplete typelibipvs.c:132: error: ‘IP_VS_SO_SET_DELDEST’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_set_timeout’:libipvs.c:140: error: ‘IP_VS_SO_SET_TIMEOUT’ undeclared (first use in this function)libipvs.c:141: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_start_daemon’:libipvs.c:148: error: ‘IP_VS_SO_SET_STARTDAEMON’ undeclared (first use in this function)libipvs.c:149: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_stop_daemon’:libipvs.c:156: error: ‘IP_VS_SO_SET_STOPDAEMON’ undeclared (first use in this function)libipvs.c:157: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_get_services’:libipvs.c:166: error: dereferencing pointer to incomplete typelibipvs.c:167: error: invalid application of ‘sizeof’ to incomplete type ‘ipvs_service_entry_t’ libipvs.c:167: error: invalid use of undefined type ‘struct ip_vs_getinfo’libipvs.c:172: error: dereferencing pointer to incomplete typelibipvs.c:172: error: invalid use of undefined type ‘struct ip_vs_getinfo’libipvs.c:174: error: ‘IP_VS_SO_GET_SERVICES’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_cmp_services’:libipvs.c:189: error: dereferencing pointer to incomplete typelibipvs.c:189: error: dereferencing pointer to incomplete typelibipvs.c:193: error: dereferencing pointer to incomplete typelibipvs.c:193: error: dereferencing pointer to incomplete typelibipvs.c:197: error: dereferencing pointer to incomplete typelibipvs.c:197: error: dereferencing pointer to incomplete typelibipvs.c:201: error: dereferencing pointer to incomplete typelibipvs.c:201: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_sort_services’:libipvs.c:208: error: dereferencing pointer to incomplete typelibipvs.c:208: error: dereferencing pointer to incomplete typelibipvs.c:209: error: invalid application of ‘sizeof’ to incomplete type ‘ipvs_service_entry_t’ libipvs.c: In function ‘ipvs_get_dests’:libipvs.c:218: error: dereferencing pointer to incomplete typelibipvs.c:218: error: invalid application of ‘sizeof’ to incomplete type ‘ipvs_dest_entry_t’ libipvs.c:218: error: dereferencing pointer to incomplete typelibipvs.c:224: error: dereferencing pointer to incomplete typelibipvs.c:224: error: dereferencing pointer to incomplete typelibipvs.c:225: error: dereferencing pointer to incomplete typelibipvs.c:225: error: dereferencing pointer to incomplete typelibipvs.c:226: error: dereferencing pointer to incomplete typelibipvs.c:226: error: dereferencing pointer to incomplete typelibipvs.c:227: error: dereferencing pointer to incomplete typelibipvs.c:227: error: dereferencing pointer to incomplete typelibipvs.c:228: error: dereferencing pointer to incomplete typelibipvs.c:228: error: dereferencing pointer to incomplete typelibipvs.c:231: error: ‘IP_VS_SO_GET_DESTS’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_cmp_dests’:libipvs.c:243: error: dereferencing pointer to incomplete typelibipvs.c:243: error: dereferencing pointer to incomplete typelibipvs.c:247: error: dereferencing pointer to incomplete typelibipvs.c:247: error: dereferencing pointer to incomplete typelibipvs.c: In function ‘ipvs_sort_dests’:libipvs.c:253: error: dereferencing pointer to incomplete typelibipvs.c:253: error: dereferencing pointer to incomplete typelibipvs.c:254: error: invalid application of ‘sizeof’ to incomplete type ‘ipvs_dest_entry_t’ libipvs.c: At top level:libipvs.c:259: error: expected ‘)’ before ‘fwmark’libipvs.c: In function ‘ipvs_get_timeout’:libipvs.c:288: error: dereferencing pointer to incomplete typelibipvs.c:293: error: ‘IP_VS_SO_GET_TIMEOUT’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_get_daemon’:libipvs.c:309: error: dereferencing pointer to incomplete typelibipvs.c:315: error: ‘IP_VS_SO_GET_DAEMON’ undeclared (first use in this function)libipvs.c: In function ‘ipvs_strerror’:libipvs.c:357: error: ‘ipvs_get_service’ undeclared (first use in this function)make[1]: *** [libipvs.o] Error 1make[1]: Leaving directory `/download/ipvsadm-1.24/libipvs'make: *** [libs] Error 2</span></span></span>

出错原因：

盲目得进行软连接，根本就没根据自己机器情况修正。

我进入/usr/src/kernels目录，发现根本什么文件都没有。

因此，应该先yum -y install kernel-devel。

安装完后，在/usr/src/kernels下看到了文件：

[root@ser6-51 kernels]# ls -ltr
total 4
lrwxrwxrwx 1 root root   34 Aug 26 10:49 2.6.32-431.el6.x86_64 -> /lib/modules/2.6.32-431.el6.x86_64
drwxr-xr-x 2 root root 4096 Aug 26 11:51 2.6.32-573.3.1.el6.x86_64

生成软连接：

ln -s /usr/src/kernels/2.6.32-573.3.1.el6.x86_64/ /usr/src/linux

注意，软连接时，需要提供2.6.32-573.3.1.el6.x86_64的绝对路径，如果直接进入/usr/src/kernels目录，这样软连接是不行的：

ln -s 2.6.32-573.3.1.el6.x86_64/ /usr/src/linux

否则，在/usr/src/linux下会看不到/usr/src/kernels/2.6.32-573.3.1.el6.x86_64/下的一些文件，编译时还是会报错。