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swap: support swapDevices.*.priority option

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This just forwards to the underlying NixOS option and expands the mount
script to exhibit the same behavior.
This commit is contained in:
Giel van Schijndel 2024-05-06 11:43:53 +02:00
parent 8a02c0507c
commit c5a25d5ced
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2 changed files with 15 additions and 2 deletions
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1
example/swap.nix
View file

@ -29,6 +29,7 @@
content = {
type = "swap";
randomEncryption = true;
priority = 100; # prefer to encrypt as long as we have space for it
};
};
plainSwap = {

16
lib/types/swap.nix
View file

@ -28,6 +28,15 @@
default = [ ];
description = "Extra arguments";
};
priority = lib.mkOption {
type = lib.types.nullOr lib.types.int;
default = null;
description = lib.mdDoc ''
Specify the priority of the swap device. Priority is a value between 0 and 32767.
Higher numbers indicate higher priority.
null lets the kernel choose a priority, which will show up as a negative value.
'';
};
randomEncryption = lib.mkOption {
type = lib.types.bool;
default = false;
@ -69,7 +78,10 @@
lib.optionalString (config.discardPolicy != null)
"--discard${lib.optionalString (config.discardPolicy != "both")
"=${config.discardPolicy}"
}"} ${config.device}
}"} ${
lib.optionalString (config.priority != null)
"--priority=${toString config.priority}"
} ${config.device}
fi
'';
};
@ -80,7 +92,7 @@
default = [{
swapDevices = [{
device = config.device;
inherit (config) discardPolicy randomEncryption;
inherit (config) discardPolicy priority randomEncryption;
}];
boot.resumeDevice = lib.mkIf config.resumeDevice config.device;
}];