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使用 DKMS，在更新時自動修補和安裝內核

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使用 DKMS，在更新時自動修補和安裝內核

我有一個系統需要修補核心中的檔案才能正常運作。系統運作的是Ubuntu 14.04。

該補丁修補了drivers/hwmon.

因此，每次核心更新後，我都需要下載核心原始碼、套用修補程式、重建核心並安裝它。

本質上，我的問題非常類似於更新時自動應用模組補丁並編譯核心？，其中建議使用 DKMS。提供了通用 DKMS 文件的鏈接，但它不涵蓋修補模組的情況。

您能告訴我如何設定 DKMS 以自動執行修補嗎？謝謝！

答案1

修補模組並不會真正改變方式。您基本上需要的是將編譯特定核心模組的樹外建置所需的所有檔案放入一個資料夾中，/usr/src/<modulename>-</moduleversion>/並且需要將設定檔新增dkms.conf到該資料夾中。

基本上它應該看起來像這樣：

MAKE="make -C $kernel_source_dir M=\$(pwd)"
PACKAGE_NAME=hwmon
PACKAGE_VERSION=1.2.3.4
BUILT_MODULE_NAME[0]="hwmon"
DEST_MODULE_LOCATION[0]="/kernel/extra"
AUTOINSTALL=yes

對於補丁，您應該看看dkms 的手冊頁連結到下面，作為摘錄：

   PATCH[#]=
          Use  the  PATCH directive array to specify patches which should be applied to
          your source before a build occurs.  All patches are expected  to  be  in  -p1
          format  and  are  applied  with the patch -p1 command.  Each directive should
          specify the filename of the patch to apply, and all patches must  be  located
          in  the  patches  subdirectory  of  your  source  directory  ( /usr/src/<mod‐
          ule>-<module-version>/patches/ ).  If any patch fails  to  apply,  the  build
          will  be  halted  and  the rejections can be inspected in /var/lib/dkms/<mod‐
          ule>/<module-version>/build/.  If a PATCH should only be  applied  condition‐
          ally,  the  PATCH_MATCH[#]  array should be used, and a corresponding regular
          expression should be placed in PATCH_MATCH[#] which will alert dkms  to  only
          use that PATCH[#] if the regular expression matches the kernel which the mod‐
          ule is currently being built for.

   PATCH_MATCH[#]=
          See the above description for PATCH[#] directives. If you only want  a  patch
          applied  in  certain  scenarios,  the PATCH_MATCH array should be utilized by
          giving a regular expression which matches the kernels you intend  the  corre‐
          sponding PATCH[#] to be applied to before building that module.

然後你想向 dkms 註冊它，建造並安裝模組

dkms add     -m hwmon -v 1.2.3.4
dkms build   -m hwmon -v 1.2.3.4
dkms install -m hwmon -v 1.2.3.4

我已經使用佔位符來表示模組名稱和版本，但您應該明白了。這全部涵蓋在dkms 的手冊頁。

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