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|
{ config, lib, ... }:
let
cfg = config.boot.tmp;
in
{
imports = [
(lib.mkRenamedOptionModule [ "boot" "cleanTmpDir" ] [ "boot" "tmp" "cleanOnBoot" ])
(lib.mkRenamedOptionModule [ "boot" "tmpOnTmpfs" ] [ "boot" "tmp" "useTmpfs" ])
(lib.mkRenamedOptionModule [ "boot" "tmpOnTmpfsSize" ] [ "boot" "tmp" "tmpfsSize" ])
];
options = {
boot.tmp = {
cleanOnBoot = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
Whether to delete all files in {file}`/tmp` during boot.
'';
};
tmpfsSize = lib.mkOption {
type = lib.types.oneOf [
lib.types.str
lib.types.ints.positive
];
default = "50%";
description = ''
Size of tmpfs in percentage.
Percentage is defined by systemd.
'';
};
tmpfsHugeMemoryPages = lib.mkOption {
type = lib.types.enum [
"never"
"always"
"within_size"
"advise"
];
default = "never";
example = "within_size";
description = ''
- `never` - Do not allocate huge memory pages. This is the default.
- `always` - Attempt to allocate huge memory page every time a new page is needed.
- `within_size` - Only allocate huge memory pages if it will be fully within i_size. Also respect madvise(2) hints. Recommended.
- `advise` - Only allocate huge memory pages if requested with madvise(2).
'';
};
useTmpfs = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
Whether to mount a tmpfs on {file}`/tmp` during boot.
::: {.note}
Large Nix builds can fail if the mounted tmpfs is not large enough.
In such a case either increase the tmpfsSize or disable this option.
:::
'';
};
};
};
config = {
# When changing remember to update /tmp mount in virtualisation/qemu-vm.nix
systemd.mounts = lib.mkIf cfg.useTmpfs [
{
what = "tmpfs";
where = "/tmp";
type = "tmpfs";
mountConfig.Options = lib.concatStringsSep "," [
"mode=1777"
"strictatime"
"rw"
"nosuid"
"nodev"
"size=${toString cfg.tmpfsSize}"
"huge=${cfg.tmpfsHugeMemoryPages}"
];
}
];
systemd.tmpfiles.rules = lib.optional cfg.cleanOnBoot "D! /tmp 1777 root root";
};
}
|
