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因项目需要,将当前内核(2.6.32-220.el6.x86_64)升级到目标内核(2.6.33-110.el6.x86_64),但是编译的目标 内核(2.6.33-110.el6.x86_64)的对应驱动程序并不一定支持当前系统的对应设备。本篇将详细讲述目标内核驱动无法支持当前网卡设备的 处理步骤。
01、编译目标内核
请参考内核编译相关文档(省略)
02、显示所有网卡
由于一个系统可以支持多张网卡,可通过如下命显示当前系统的所有网卡及其基本信息:
#ifconfig -a
em1 Link encap:Ethernet HWaddr EC:F4:BB:D0:0B:60
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
em2 Link encap:Ethernet HWaddr EC:F4:BB:D0:0B:62
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
em3 Link encap:Ethernet HWaddr EC:F4:BB:D0:0B:64
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Memory:dbe80000-dbf00000
03、查看网卡所需驱动
使用ethtool命令可以查看指定网卡所以来的网卡驱动信息:
#ethtool -i em3
driver: igb - 网卡em3依赖igb驱动
version: 3.0.6-k
firmware-version: 1.6-7
bus-info: 0000:08:00.0
注:igb 驱动程序支持所有基于 82575 、 82576 、 82580 和 I350 的千兆位网络连接。
04、查看网卡型号
通过③我们已经知道了网卡所依赖的驱动,但是还不知具体的网卡驱动型号,此时可通过如下命令查询:
# lspci -nn | grep "Eth"
01:00.0 Ethernet controller [0200]: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
01:00.1 Ethernet controller [0200]: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
03:00.0 Ethernet controller [0200]: Intel Corporation 82599EB 10-Gigabit SFP+ Network Connection [8086:154d] (rev 01)
03:00.1 Ethernet controller [0200]: Intel Corporation 82599EB 10-Gigabit SFP+ Network Connection [8086:154d] (rev 01)
08:00.0 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
08:00.1 Ethernet controller [0200]: Intel Corporation I350 Gigabit Network Connection [8086:1521] (rev 01)
注:Gigabit为千兆 10-Gigabit为万兆
由④的操作可知当前内核(2.6.32-220.el6.x86_64)千兆网络驱动igb支持网卡型号[8086:1521],因此必须要求目标内核(2.6.33-110.el6.x86_64)对该型号网卡[8086:1521]的支持。
05、查看目标内核的网卡驱动是否支持当前型号网卡
可以通过modinfo命令查看*.ko对哪种设备型号的支持,目标内核(2.6.33-110.el6.x86_64)的相关驱动可在/lib/modules/2.6.33-110.el6.x86_64的目录想找到,如下所示:
#modinfo /lib/modules/2.6.33-110.el6.x86_64/kernel/drivers/net/igb/igb.ko
filename: igb.ko
version: 2.1.0-k2
license: GPL
description: Intel(R) Gigabit Ethernet Network Driver
author: Intel Corporation, <e1000-devel@lists.sourceforge.net>
srcversion: 412D1CB4C85682CBF07976F
alias: pci:v00008086d000010D6sv*sd*bc*sc*i*
alias: pci:v00008086d000010A9sv*sd*bc*sc*i*
alias: pci:v00008086d000010A7sv*sd*bc*sc*i*
alias: pci:v00008086d000010E8sv*sd*bc*sc*i*
alias: pci:v00008086d0000150Dsv*sd*bc*sc*i*
alias: pci:v00008086d000010E7sv*sd*bc*sc*i*
alias: pci:v00008086d000010E6sv*sd*bc*sc*i*
alias: pci:v00008086d00001518sv*sd*bc*sc*i*
alias: pci:v00008086d0000150Asv*sd*bc*sc*i*
alias: pci:v00008086d000010C9sv*sd*bc*sc*i*
alias: pci:v00008086d00001516sv*sd*bc*sc*i*
alias: pci:v00008086d00001511sv*sd*bc*sc*i*
alias: pci:v00008086d00001510sv*sd*bc*sc*i*
alias: pci:v00008086d0000150Fsv*sd*bc*sc*i*
alias: pci:v00008086d0000150Esv*sd*bc*sc*i*
depends:
vermagic: 2.6.33-110.el6.x86_64 SMP mod_unload modversions
从以上信息中找不到[8086:1521]的信息,因此,目标内核(2.6.33-110.el6.x86_64)网卡驱动不支持当前网卡!
06、到官网下载网卡驱动
既然已经明确了目标内核的网卡驱动并不支持当前的网卡设备,也就是说一旦启用新的内核,将导致系统无法正常使用网络功能。如果是英特尔的网卡设备,则可
到:http://www.intel.cn/content/www/cn/zh/homepage.html 下载所需的驱动源码到本地。
07、编译网卡驱动
解压驱动源码后,按照以下命令格式编译驱动源码:
#make BUILD_KERNEL=2.6.33-110.el6.x86_64
以上命令将会生成网卡驱动igb.ko。其中BUILD_KERNEL指明需要为哪个内核编译驱动,默认是给当前正在运行的内核编译,在此我们设定为目标内核(2.6.33-110.el6.x86_64)。那么又该如何查看新生成的网卡驱动igb.ko是否支持当前的网卡设备呢?
08、检查网卡驱动是否支持当前网卡
步骤⑦将会生成网卡驱动igb.ko,这时可通过modinfo命令验证该驱动是否支持网卡设备[8086:1521],如下所示:
#modinfo igb.ko
filename: igb.ko
version: 5.2.9.4
license: GPL
description: Intel(R) Gigabit Ethernet Network Driver
author: Intel Corporation, <e1000-devel@lists.sourceforge.net>
srcversion: E377200391EBF74638FEDA2
alias: pci:v00008086d000010D6sv*sd*bc*sc*i*
......
......
alias: pci:v00008086d00001522sv*sd*bc*sc*i*
alias: pci:v00008086d00001521sv*sd*bc*sc*i*
alias: pci:v00008086d00001539sv*sd*bc*sc*i*
......
depends: hwmon
vermagic: 2.6.33-110.el6.x86_64 SMP mod_unload modversions
parm: InterruptThrottleRate:Maximum interrupts per second, per vector, (max 100000), default 3=adaptive (array of int)
parm: IntMode:Change Interrupt Mode (0=Legacy, 1=MSI, 2=MSI-X), default 2 (array of int)
parm: Node:set the starting node to allocate memory on, default -1 (array of int)
parm: LLIPort:Low Latency Interrupt TCP Port (0-65535), default 0=off (array of int)
parm: LLIPush:Low Latency Interrupt on TCP Push flag (0,1), default 0=off (array of int)
parm: LLISize:Low Latency Interrupt on Packet Size (0-1500), default 0=off (array of int)
parm: RSS:Number of Receive-Side Scaling Descriptor Queues (0-8), default 1, 0=number of cpus (array of int)
parm: VMDQ:Number of Virtual Machine Device Queues: 0-1 = disable, 2-8 enable, default 0 (array of int)
parm: max_vfs:Number of Virtual Functions: 0 = disable, 1-7 enable, default 0 (array of int)
parm: MDD:Malicious Driver Detection (0/1), default 1 = enabled. Only available when max_vfs is greater than 0 (array of int)
parm: QueuePairs:Enable Tx/Rx queue pairs for interrupt handling (0,1), default 1=on (array of int)
parm: EEE:Enable/disable on parts that support the feature (array of int)
parm: DMAC:Disable or set latency for DMA Coalescing ((0=off, 1000-10000(msec), 250, 500 (usec)) (array of int)
parm: LRO:Large Receive Offload (0,1), default 0=off (array of int)
parm: debug:Debug level (0=none, ..., 16=all) (int)
终于在显示的信息中找到了[8086:1521]信息,说明新生成的驱动文件能够支持当前网卡型号。那么如何让目标内核(2.6.33-110.el6.x86_64)能够载入新驱动呢?
09、更新目标内核驱动
首先,将新驱动igb.ko拷贝到目标内核/lib/modules/2.6.33-110.el6.x86_64下的指定目录
#cp igb.ko /lib/modules/2.6.33-110.el6.x86_64/kernel/drivers/net/igb/
其次,使用depmod更新目标内核(2.6.33-110.el6.x86_64)模块的依赖关系
#depmod -a 2.6.33-110.el6.x86_64
10、以上工作完成后,可以重启系统了!
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原文地址:http://www.cnblogs.com/jacklikedogs/p/4659816.html