Linux-4.9.2内核在mini2440上的移植(七)——NFS文件系统挂载

本篇目标：在ubuntu主机上搭建一个NFS服务器，并将友善提供的rootfs源码进行NFS挂载测试，验证yaffs文件系统以及DM9000的驱动是否正常运行。

NFS服务器搭建参考：

http://www.linuxidc.com/Linux/2017-02/141150.htm

http://www.linuxidc.com/Linux/2016-04/129848.htm

 

7.1 配置NFS服务器

（1）打开一个putty窗口，登录到ubuntu服务器，并安装nfs-server

root@ubuntu:~#apt-get install nfs-kernel-server

 

（2）配置目录

NFS的共享目录定在/root/NFS/rootfs

 

创建目录

root@ubuntu:~/linux-4.9.2#mkdir /root/NFS

root@ubuntu:~/linux-4.9.2#mkdir /root/NFS/rootfs

 

（3）修改环境

root@ubuntu:~# vim /etc/exports

 

在结尾添加

/root/NFS/rootfs *(rw,no_root_squash,no_subtree_check,async)

上面的括号内几个参数是什么意思呢？

注释：

      *                       指任何的IP都可以访问rootfs

       rw                      指rootfs可以读写操作

       no_root_squash          指访问的IP用户具有root权限

       no_subtree_check        指不检查目录的权限

       async       同步数据

       注意：这几个参数之间有逗号隔开，中间不能再有空格。

 

（4）重启nfs

root@ubuntu:~#service nfs-kernel-server restart

 

（5）查看挂载情况

root@ubuntu:~#showmount -e

Export list forubuntu:

/root/NFS/rootfs*

 

7.2 上传友善之臂的文件系统

（1）打开winscp，选择友善之臂光盘目录下的linux/rootfs_qtopia_qt4-20110304.tar.gz上传到ubuntu 的/home/ubuntu/目录下面。

（2）复制到root文件夹，并解压

root@ubuntu:~#cp /home/ubuntu/rootfs_qtopia_qt4-20110304.tar.gz /root/NFS/

root@ubuntu:~#cd NFS/

root@ubuntu:~/NFS#tar -zxvf rootfs_qtopia_qt4-20110304.tar.gz

root@ubuntu:~/NFS#rm -rf rootfs

root@ubuntu:~/NFS#mv rootfs_qtopia_qt4 rootfs

 

7.3 修改uboot为nfs驱启动

（1）重启开发板，在secureCRT的uboot界面按空格，进入uboot控制台。

（2）设置参数：

setenv bootargsconsole=ttySAC0,115200 root=/dev/nfs nfsroot=192.168.2.104:/root/NFS/rootfsip=192.168.2.188:192.168.2.104:192.168.2.1:255.255.255.0:SMDK2440A.arm9.net:eth0:offinit=/linuxrc

 

saveenv

 

注意：

nfsroot=192.168.2.104:/root/NFS/rootfs是服务器的NFS途径

ip后面的四个地址ip=192.168.2.188:192.168.2.104:192.168.2.1:255.255.255.0

分别为：开发板ip，服务器ip，网关ip，子网掩码

（3）启动

在uboot中输入boot回车

看到secureCRT输出

dm9000 dm9000eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

VFS: Mounted root(nfs filesystem) on device 0:12.

Freeing unusedkernel memory: 176K (c0568000 - c0594000)

Thisarchitecture does not have kernel memory protection.

mount: mountingnone on /proc/bus/usb failed: No such file or directory

hwclock: can'topen '/dev/misc/rtc': No such file or directory

/etc/init.d/rcS:line 39: /etc/rc.d/init.d/netd: Input/output error

/etc/init.d/rcS:line 43: /etc/rc.d/init.d/httpd: Input/output error

/etc/init.d/rcS:line 47: /etc/rc.d/init.d/leds: Input/output error

                        

Try to bring eth0 interface up......nfs: server 192.168.2.104not responding, still trying

 

这里是因为网卡被重启，导致无法连接服务器，需要到rootfs文件夹修改一下参数。

使用putty登录到ubuntu，到NFS文件目录下。

root@ubuntu:~/NFS#vim rootfs/etc/init.d/rcS

在第54行/etc/init.d/ifconfig-eth0

在其前面添加一个#

即

/sbin/ifconfiglo 127.0.0.1

#/etc/init.d/ifconfig-eth0

保存，重启开发板

启动记录如下：

Starting kernel...

 

Booting Linux onphysical CPU 0x0

Linux version4.9.2 (root@ubuntu) (gcc version 6.3.0 20170406 (Ubuntu/Linaro 6.3.0-12ubuntu2)) #10 Wed Sep 27 06:23:47 PDT 2017

CPU: ARM920T[41129200] revision 0 (ARMv4T), cr=c000717f

CPU: VIVT datacache, VIVT instruction cache

Machine:Mini2440 development board

Memory policy:Data cache writeback

CPU S3C2440A (id0x32440001)

Built 1zonelists in Zone order, mobility grouping on. Total pages: 16256

Kernel commandline: console=ttySAC0,115200 root=/dev/nfsnfsroot=192.168.2.104:/root/NFS/rootfsip=192.168.2.188:192.168.2.104:192.168.2.1:255.255.255.0:SMDK2440A.arm9.net:eth0:offinit=/linuxrc

PID hash tableentries: 256 (order: -2, 1024 bytes)

Dentry cachehash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hashtable entries: 4096 (order: 2, 16384 bytes)

Memory:58756K/65536K available (4379K kernel code, 177K rwdata, 996K rodata, 176Kinit, 259K bss, 6780K reserved, 0K cma-reserved)

Virtual kernelmemory layout:

    vector : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap : 0xffc00000 - 0xfff00000   (3072kB)

    vmalloc : 0xc4800000 - 0xff800000   ( 944 MB)

    lowmem : 0xc0000000 - 0xc4000000   (  64 MB)

    modules : 0xbf000000 - 0xc0000000   (  16MB)

      .text : 0xc0008000 - 0xc044eef8   (4380 kB)

      .init : 0xc0568000 - 0xc0594000   ( 176 kB)

      .data : 0xc0594000 - 0xc05c0760   ( 178 kB)

       .bss : 0xc05c0760 - 0xc0601380   ( 260 kB)

SLUB:HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

NR_IRQS:103

S3C2440: IRQSupport

irq: clearingpending status 00000002

sched_clock: 16bits at 1012kHz, resolution 987ns, wraps every 32362962ns

clocksource:samsung_clocksource_timer: mask: 0xffff max_cycles: 0xffff, max_idle_ns:28803037 ns

Console: colourdummy device 80x30

Calibratingdelay loop... 201.52 BogoMIPS (lpj=503808)

pid_max:default: 32768 minimum: 301

Mount-cache hashtable entries: 1024 (order: 0, 4096 bytes)

Mountpoint-cachehash table entries: 1024 (order: 0, 4096 bytes)

CPU: Testingwrite buffer coherency: ok

Setting upstatic identity map for 0x300081e0 - 0x30008238

clocksource:jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9556302231375000ns

NET: Registeredprotocol family 16

DMA: preallocated256 KiB pool for atomic coherent allocations

cpuidle: usinggovernor ladder

S3C2440:Initialising architecture

usbcore:registered new interface driver usbfs

usbcore:registered new interface driver hub

usbcore:registered new device driver usb

s3c-i2cs3c2440-i2c.0: slave address 0x10

s3c-i2cs3c2440-i2c.0: bus frequency set to 98 KHz

s3c-i2cs3c2440-i2c.0: i2c-0: S3C I2C adapter

Advanced LinuxSound Architecture Driver Initialized.

clocksource:Switched to clocksource samsung_clocksource_timer

NET: Registeredprotocol family 2

TCP establishedhash table entries: 1024 (order: 0, 4096 bytes)

TCP bind hashtable entries: 1024 (order: 0, 4096 bytes)

TCP: Hash tablesconfigured (established 1024 bind 1024)

UDP hash tableentries: 256 (order: 0, 4096 bytes)

UDP-Lite hashtable entries: 256 (order: 0, 4096 bytes)

NET: Registeredprotocol family 1

RPC: Registerednamed UNIX socket transport module.

RPC: Registeredudp transport module.

RPC: Registeredtcp transport module.

RPC: Registeredtcp NFSv4.1 backchannel transport module.

futex hash tableentries: 256 (order: -1, 3072 bytes)

workingset:timestamp_bits=30 max_order=14 bucket_order=0

NFS: Registeringthe id_resolver key type

Key typeid_resolver registered

Key typeid_legacy registered

jffs2: version2.2. (NAND) 漏 2001-2006 Red Hat, Inc.

romfs: ROMFS MTD(C) 2007 Red Hat, Inc.

io schedulernoop registered

io schedulerdeadline registered

io scheduler cfqregistered (default)

Console:switching to colour frame buffer device 60x53

s3c2410-lcds3c2410-lcd: fb0: s3c2410fb frame buffer device

s3c2440-uart.0:ttySAC0 at MMIO 0x50000000 (irq = 74, base_baud = 0) is a S3C2440

console[ttySAC0] enabled

s3c2440-uart.1:ttySAC1 at MMIO 0x50004000 (irq = 77, base_baud = 0) is a S3C2440

s3c2440-uart.2:ttySAC2 at MMIO 0x50008000 (irq = 80, base_baud = 0) is a S3C2440

brd: moduleloaded

s3c24xx-nands3c2440-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns

s3c24xx-nands3c2440-nand: NAND soft ECC

nand: devicefound, Manufacturer ID: 0xec, Chip ID: 0xda

nand: Samsung NAND256MiB 3,3V 8-bit

nand: 256 MiB,SLC, erase size: 128 KiB, page size: 2048, OOB size: 64

Scanning devicefor bad blocks

Bad eraseblock1620 at 0x00000ca80000

Bad eraseblock1935 at 0x00000f1e0000

Creating 5 MTDpartitions on "NAND":

0x000000000000-0x000000040000: "boot"

0x000000040000-0x000000060000: "param"

0x000000060000-0x000000560000: "kernel"

0x000000560000-0x000006960000: "rootfs"

0x000000000000-0x000010000000: "nand"

eth0: dm9000e atc4a5b300,c4a5d304 IRQ 55 MAC: 08:00:3e:26:0a:5b (chip)

ohci_hcd: USB1.1 'Open' Host Controller (OHCI) Driver

ohci-s3c2410:OHCI S3C2410 driver

s3c2410-ohcis3c2410-ohci: OHCI Host Controller

s3c2410-ohcis3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohcis3c2410-ohci: irq 42, io mem 0x49000000

random: fastinit done

hub 1-0:1.0: USBhub found

hub 1-0:1.0: 2ports detected

mousedev: PS/2mouse device common for all mice

i2c /dev entriesdriver

s3c2410-wdts3c2410-wdt: watchdog inactive, reset disabled, irq disabled

sdhci: SecureDigital Host Controller Interface driver

sdhci:Copyright(c) Pierre Ossman

hidraw: raw HIDevents driver (C) Jiri Kosina

usbcore:registered new interface driver usbhid

usbhid: USB HIDcore driver

NET: Registeredprotocol family 17

Key typedns_resolver registered

hctosys: unable to open rtc device (rtc0)

dm9000 dm9000eth0: link down

dm9000 dm9000eth0: link up, 100Mbps, full-duplex, lpa 0x45E1

IP-Config:Complete:

     device=eth0, hwaddr=08:00:3e:26:0a:5b,ipaddr=192.168.2.188, mask=255.255.255.0, gw=192.168.2.1

     host=SMDK2440A, domain=, nis-domain=arm9.net

     bootserver=192.168.2.104,rootserver=192.168.2.104, rootpath=

ALSA device list:

  No soundcards found.

VFS: Mountedroot (nfs filesystem) on device 0:12.

Freeing unusedkernel memory: 176K (c0568000 - c0594000)

Thisarchitecture does not have kernel memory protection.

mount: mountingnone on /proc/bus/usb failed: No such file or directory

hwclock: can'topen '/dev/misc/rtc': No such file or directory

/etc/init.d/rcS:line 39: /etc/rc.d/init.d/netd: Input/output error

/etc/init.d/rcS:line 43: /etc/rc.d/init.d/httpd: Input/output error

/etc/init.d/rcS:line 47: /etc/rc.d/init.d/leds: Input/output error

                       

 

Please pressEnter to activate this console. /bin/qtopia: line 22: can't create /etc/pointercal:Permission denied

 

按下回车，输入ls

[root@FriendlyARM/]# ls

bin      etc     lib      mnt      proc    sbin     tmp      var

dev      home    linuxrc  opt      root    sys      usr      www

[root@FriendlyARM/]#

由此可见，NFS已经成功加载，说明驱动移植成功。

但是从打印的信息来看，RTC驱动，声卡驱动还是有问题。下回再移植RTC驱动。