通過mdev實現Linux下U盤自動掛載（筆記）

開發板：exynos4412（super4412） 

內核：Linux 3.0.15

 
通過mdev工具實現u盤自動掛載步驟如下：
一、配置內核

配置內核支持USB大容量存儲
#make menuconfig
選擇Device Drivers --> 
             USB support -->
                   <*> Support for Host-side USB
                   <*> OHIC HCD support
                   <*> UHCI HCD (most Intel and VIA) support
                   <*> SL811HS HCD support
                   <*> USB Mass Storage support

開啓內核熱插拔，在內核根目錄下

#vim .config
CONFIG_KALLSYMS=y
CONFIG_HOTPLUG=y  
CONFIG_PRINTK=y  
CONFIG_NET=y  

二、配置busybox
#make menuconfig
選擇Linux System Utilities --->
             [*]mdev
             [*]     Support /etc/mdev.conf
             [*]          Support subdirs/symlinks
             [*]               Support regular expressions substitutions when renaming device
             [*]          Support command execution at device addition/removal
             [*]     Support loading of firmwares
三、添加對熱插拔事件響應，實現u盤自動掛載與卸載
1) 創建mdev.conf文件：
#vi /etc/mdev.conf
寫入：
sd[a-z][0-9]  0:0  666  @/etc/hotplug/udisk_insert
sd[a-z]  0:0  666 $/etc/hotplug/udisk_remove
 
2) 創建udisk_insert文件
#mkdir -p /etc/hotplug
#vi /etc/hotplug/udisk_insert
寫入：
#!/bin/sh
mkdir -p /mnt/usb
mount /dev/sd[a-z][0-9] /mnt/usb
 

3) 創建udisk_remove文件

#vi /etc/hotplug/udisk_insert

寫入：

#!/bin/sh

umount -l /mnt/usb
rm /mnt/usb -rf
 
4)修改腳本權限
#chmod 755 /etc/hotplug/*

OK,配置完畢，插上u盤試試吧！