linux nbd模块 Centos7.3 安装编译nbd模块-Go语言中文社区

未安装nbd模块

[zhaojq@localhost ~]$modprobe nbd

modprobe: FATAL: Module nbd not found.

查看linux版本

[zhaojq@localhost ~]$cat /etc/redhat-release

CentOS Linux release 7.3.1611 (Core)

[zhaojq@localhost ~]$uname -r

3.10.0-514.26.2.el7.x86_64

安装

[root@localhost tmp]# yum install kernel-devel kernel-headers

注意： wget的地址需要根据自身的系统版本设定

[root@localhost tmp]# cd /tmp/

[root@localhost tmp]# wget /7.3.1611/os/Source/SPackages/kernel-3.10.0-514.el7.src.rpm

在/root/rpmbuild/SOURCES下生成linux-3.10.0-514.el7.tar.xz

[root@localhost SOURCES]# rpm -ihv kernel-3.10.0-123.el7.src.rpm

[root@localhost SOURCES]# cd ~/rpmbuild/SOURCES

[root@localhost SOURCES]# tar Jxvf linux-3.10.0-123.el7.tar.xz -C /usr/src/kernels/

[root@localhost SOURCES]# cd /usr/src/kernels/

/usr/src/kernels/ 路径下出现 3.10.0-514.26.2.el7.x86_64 和linux-3.10.0-514.el7两个文件夹

[root@localhost kernels]# mv $(uname -r) $(uname -r)-old

[root@localhost kernels]# mv linux-3.10.0-123.el7 $(uname -r)

[root@localhost kernels]# cd $(uname -r)

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make mrproper

[root@localhost 3.10.0-514.26.2.el7.x86_64]# cp ../$(uname -r)-old/Module.symvers ./

[root@localhost 3.10.0-514.26.2.el7.x86_64]# cp /boot/config-$(uname -r) ./.config

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make oldconfig

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make prepare

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make scripts

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make CONFIG_BLK_DEV_NBD=m M=drivers/block

[root@localhost 3.10.0-514.26.2.el7.x86_64]# cp drivers/block/nbd.ko /lib/modules/$(uname -r)/kernel/drivers/block/

[root@localhost 3.10.0-514.26.2.el7.x86_64]# depmod -a

错误处理

make scripts

错误：Makefile:901: "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev or elfutils-libelf-devel"

解决办法：yum install elfutils-libelf-devel

make CONFIG_BLK_DEV_NBD=m M=drivers/block

错误：make[1]: *** 没有规则可以创建“drivers/block/floppy.o”需要的目标“tools/objtool/objtool”。 停止。

解决办法：首先查看make scripts时是否出错，解决后，从make prepare命令开始重新执行

[root@localhost 3.10.0-514.26.2.el7.x86_64]# make prepare

scripts/kconfig/conf --silentoldconfig Kconfig

make[1]: 对“all”无需做任何事。

ke[1]: 对“relocs”无需做任何事。

▽ CHK include/generated/uapi/linux/version.h

CHK include/generated/utsrelease.h

make[1]: “arch/x86/purgatory/kexec-purgatory.c”是最新的。

CALL scripts/checksyscalls.sh

DESCEND objtool

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/fixdep.o

LD /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/fixdep-in.o

LINK /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/fixdep

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/exec-cmd.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/help.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/pager.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/parse-options.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/run-command.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/sigchain.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/subcmd-config.o

LD /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/libsubcmd-in.o

AR /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/libsubcmd.a

GEN /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/arch/x86/insn/inat-tables.c

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/arch/x86/decode.o

LD /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/arch/x86/objtool-in.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/builtin-check.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/elf.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/special.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/objtool.o

CC /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/libstring.o

LD /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/objtool-in.o

LINK /usr/src/kernels/3.10.0-514.26.2.el7.x86_64/tools/objtool/objtool

make CONFIG_BLK_DEV_NBD=m M=drivers/block

错误：drivers/block/nbd.c: 在函数‘__nbd_ioctl’中:

drivers/block/nbd.c:619:19: 错误：‘REQ_TYPE_SPECIAL’未声明(在此函数内第一次使用)

sreq.cmd_type = REQ_TYPE_SPECIAL;

^

drivers/block/nbd.c:619:19: 附注：每个未声明的标识符在其出现的函数内只报告一次

make[1]: *** [drivers/block/nbd.o] 错误 1

make: *** [_module_drivers/block] 错误 2

1、 REQ_TYPE_SPECIAL变量是在/usr/src/kernels/3.10.0-514.26.2.el7.x86_64/include/linux/blkdev.h文件中定义，由代码可知 REQ_TYPE_SPECIAL = 7：

/*

* request command types

*/

enum rq_cmd_type_bits {

REQ_TYPE_FS = 1, /* fs request */

REQ_TYPE_BLOCK_PC, /* scsi command */

REQ_TYPE_SENSE, /* sense request */

REQ_TYPE_PM_SUSPEND, /* suspend request */

REQ_TYPE_PM_RESUME, /* resume request */

REQ_TYPE_PM_SHUTDOWN, /* shutdown request */

#ifdef __GENKSYMS__

REQ_TYPE_SPECIAL, /* driver defined type */

#else

REQ_TYPE_DRV_PRIV, /* driver defined type */

#endif

/*

* for ATA/ATAPI devices. this really doesn't belong here, ide should

* use REQ_TYPE_DRV_PRIV and use rq->cmd[0] with the range of driver

* private REQ_LB opcodes to differentiate what type of request this is

*/

REQ_TYPE_ATA_TASKFILE,

REQ_TYPE_ATA_PC,

};

2、修改drivers/block/nbd.c，将sreq.cmd_type直接定义为7

//sreq.cmd_type = REQ_TYPE_SPECIAL;

sreq.cmd_type = 7;

3、重新执行 make CONFIG_BLK_DEV_NBD=m M=drivers/block

运行

[zhaojq@localhost ~]$ modinfo nbd

filename: /lib/modules/3.10.0-514.26.2.el7.x86_64/kernel/drivers/block/nbd.ko

license: GPL

description: Network Block Device

rhelversion: 7.3

srcversion: EDE909A294AC5FE08E81957

depends:

vermagic: 3.10.0 SMP mod_unload modversions

parm: nbds_max:number of network block devices to initialize (default: 16) (int)

parm: max_part:number of partitions per device (default: 0) (int)

parm: debugflags:flags for controlling debug output (int)