[systemd-bugs] [Bug 87230] New: No way to configure systemd-gpt-auto-generator, or mask unwanted vendor's generators by user

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87230

            Bug ID: 87230
           Summary: No way to configure systemd-gpt-auto-generator, or
                    mask unwanted vendor's generators by user
           Product: systemd
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: natrio at list.ru
        QA Contact: systemd-bugs at lists.freedesktop.org

1) systemd-generators are typically used to convert configuration files in
units.
But, systemd-gpt-auto-generator has NO config. 

2) As it says in a description of generators, "User configuration should
override vendor configuration. This (mostly) means that stuff from /etc should
override stuff from /usr."
http://www.freedesktop.org/wiki/Software/systemd/Generators/
However, the systemd-gpt-auto-generator is provided by the vendor and can not
be overridden or disabled by user.
In addition, the generated units names contain non-permanent device names, like
dev-sda1.swap, and therefore can't be reliably masked by user.

In other words, the systemd-gpt-auto-generator makes GPT, in some
circumstances, a higher priority than the explicitly given configuration in
fstab:

If GPT contain two swap partitions, with DEFAULT, non-changed "swap" ID, it
will automatically connect both swaps, even if the fstab (or directly in the
native units) explicitly stated to use ONLY ONE of them.


Possible solutions:
1) Make systemd-gpt-auto-generator configurable by user, to filter selected
types of partitions, or ability to swich off GPT reading in main systemd
config.
2) Make way to mask unwanted system-generators, like units or udev-rules.

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