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Linux Hotplug

¸®´ª½º¿¡¼­ Hotplug°¡ ¾î¶² ¹æ½ÄÀ¸·Î µ¿ÀÛÇÏ°í ¾î¶°ÇÑ ÀåÄ¡µéÀÌ Áö¿øµÇ´ÂÁö ¼³¸íÇÑ´Ù.

LinuxHotplug ¸¦ »ç¿ëÇϱâ À§ÇÑ Áغñ


  • ¸®´ª½º Ä¿³Î 2.4 ÀÌ»ó

  • Ä¿³Î ¼³Á¤¿¡¼­ General setup -> Support for hot-pluggable devices ¿É¼ÇÀÌ ÄÑÁ®ÀÖ¾î¾ß ÇÑ´Ù.
  • hotplug ½ºÅ©¸³Æ®

  • [http]Linux Hotplugging¿¡¼­ ¹Þ¾Æ¼­ ¼³Ä¡ÇÑ´Ù.
  • hotplug°¡ °¡´ÉÇÑ Çϵå¿þ¾î

  • usb, ieee1394, pci, pcmcia(2.6.13ÀÌ»ó) hotplugÀåÄ¡ µîµî.

LinuxHotplug µ¿ÀÛ¹æ½Ä


  • hotplug¸¦ Áö¿øÇÏ´Â ÀåÄ¡°¡ ¿¬°áµÈ´Ù.
  • ¿¬°áµÇ¸é ÀåÄ¡ÀÇ Å¬·¡½º µå¶óÀ̹ö¿¡¼­ /proc/sys/kernel/hotplug¿¡ µî·ÏµÈ ÇÁ·Î±×·¥À» È£ÃâÇÑ´Ù. (ÁÖ·Î /sbin/hotplug )

  • hotplugÀÇ ÀÎÀÚ·Î ÀåġŬ·¡½ºÀÇ À̸§ÀÌ ºÙ´Â´Ù. (ex: usb, ieee1394 ...)
  • /sbin/hotplug¿¡¼­´Â /etc/hotplug.d/ÀåġŬ·¡½º/*.hotplug ¿Í /etc/hotplug.d/default/*.hotplug ½ºÅ©¸³Æ®¸¦ ¼öÇàÇÑ´Ù.

  • °¢°¢ÀÇ ½ºÅ©¸³Æ®¸¦ hotplug agent¶ó°í ºÎ¸¥´Ù.
  • /etc/hotplug.d/default/default.hotplug´Â linux-hotplug.sf.net¿¡¼­ Á¦°øÇÏ´Â °ÍÀ¸·Î ÇØ´ç ÀåÄ¡°¡ ÇÊ¿ä·Î ÇÏ´Â Ä¿³Î ¸ðµâÀ» ÀûÀçÇÏ´Â ¿ªÇÒÀ» ÇÑ´Ù.
  • /etc/hotplug.d/default/udev.hotplug´Â ¸®´ª½º 2.6¿¡¼­ µ¿ÀÛÇÏ´Â °ÍÀ¸·Î ±âÁ¸ÀÇ devfs¸¦ ±³Ã¼ÇÏ°í À¯¿¬ÇÑ ÀåÄ¡À̸§À» Á¦°øÇÑ´Ù.
  • /etc/hotplug.d/default/hal.hotplug´Â HAL Daemon¿¡ ÇØ´çÀåÄ¡°¡ ¿¬°áµÇ¾ú´Ù´Â °ÍÀ» dbus¸¦ ÅëÇØ ¾Ë·ÁÁØ´Ù.
  • °¢ ½ºÅ©¸³Æ®¿¡¼­ ȯ°æº¯¼ö¸¦ ÂüÁ¶Çؼ­ ÀåÄ¡¿¡ ´ëÇÑ ÀÛ¾÷À» ¼öÇàÇÑ´Ù.
  • ȯ°æº¯¼ö´Â ´ÙÀ½°ú °°´Ù.

Linux 2.4


  • USB
    ACTION=%s [add or remove] 
    DEVPATH=%s
    PRODUCT=%x/%x/%x 
    INTERFACE=%d/%d/%d [ for interface 0, if TYPE=0/*/* ] 
    TYPE=%d/%d/%d 
    


  • IEEE1394
    ACTION=%s [add or remove] 
    VENDOR_ID=%x [24 bit vendor id]
    GUID=%x [64 bit globally unique id]
    SPEFICIER_ID=%x [24 bit id of owner of specification]
    VERSION=%d.%d [version of specification]
    


  • PCI
    ACTION=%s [add or remove] 
    PCI_CLASS=%06X 
    PCI_ID=%04X:%04X 
    PCI_SLOT_NAME=%s 
    PCI_SUBSYS_ID=%04X:%04X
    


Linux 2.6


  • ¸®´ª½º Ä¿³Î 2.6 ¿¡¼­´Â ÀåÄ¡ÀÇ Å¬·¡½ºµå¶óÀ̹ö°¡ ¾Æ´Ñ kobject¼öÁØ¿¡¼­ hotplug½ºÅ©¸³Æ®¸¦ È£ÃâÇÑ´Ù.
  • ´õºÒ¾î °¢ ÀåÄ¡¿¡ ´ëÇØ ´ëÀÀµÇ´Â sysfsÀÇ °æ·Î°¡ ÇÔ²² ȯ°æº¯¼ö·Î ³Ñ¾î¿Â´Ù.
  • SCSI, SCSI_HOST, SCSI_DEVICE, BLOCK, INPUT, NET

ACTION=%s [add or remove]
DEVPATH=/%s/%s...

LinuxHotplugÀÇ ½ÇÁ¦ È°¿ë¿¹


gphoto2

  • gphoto2´Â ¿©·¯ Unix½Ã½ºÅÛ¿¡¼­ ¾µ ¼ö ÀÖ´Â µðÁöÅÐÄ«¸Þ¶ó °ü¸® ÇÁ·Î±×·¥ÀÌ´Ù.
  • gphoto2¸¦ ¼³Ä¡Çϸé /etc/hotplug/usb/usbcam ½ºÅ©¸³Æ®°¡ µî·ÏµÈ´Ù.
  • usbcam½ºÅ©¸³Æ®´Â gphoto2¿¡¼­ Áö¿øÇÏ´Â Ä«¸Þ¶ó°¡ ¿¬°áµÇ¾úÀ» ¶§ ÇöÀç consoleÀ» ¾²´Â »ç¿ëÀÚ¿¡°Ô µðÁöÅÐÄ«¸Þ¶ó¿¡ Á¢±ÙÇÒ ¼ö ÀÖ´Â Çã°¡±ÇÀ» ÁØ´Ù.

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