95 lines
2.7 KiB
Nix
95 lines
2.7 KiB
Nix
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{ config, lib, pkgs, ... }:
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let
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inherit (lib)
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optionalString
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mkOption
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types;
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cfg = config.idiosyn.btrfs;
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btrfs-scrub = pkgs.writeShellApplication {
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name = "btrfs-scrub";
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runtimeInputs = with pkgs; [ util-linux btrfs-progs ];
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text = ''
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findmnt --noheadings --output "SOURCE" --types btrfs --nofsroot | sort -u \
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| xargs -n 1 -P "$(nproc)" -r btrfs scrub start -B
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'';
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};
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btrfs-balance = pkgs.writeShellApplication {
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name = "btrfs-balance";
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runtimeInputs = with pkgs; [ util-linux btrfs-progs ];
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text = ''
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findmnt --types btrfs --output "SOURCE" --nofsroot --noheading | sort -u \
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| xargs -n 1 -r findmnt --first-only --noheadings --output "TARGET" --types btrfs --source \
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| xargs -n 1 -P "$(nproc)" -r btrfs balance start${optionalString (cfg.balance.dataUsage != null) " -dusage=${toString cfg.balance.dataUsage}"}${optionalString (cfg.balance.metadataUsage != null) " -musage=${toString cfg.balance.metadataUsage}"}
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'';
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};
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in {
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options = {
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idiosyn.btrfs = {
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scrub.timer = mkOption {
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type = with types; nullOr nonEmptyStr;
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default = null;
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example = "weekly";
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description = ''
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Realtime (wallclock) timer for regular scrubs
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See {manpage}systemd.time(7).
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'';
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};
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balance = {
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timer = mkOption {
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type = with types; nullOr nonEmptyStr;
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default = null;
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example = "weekly";
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description = ''
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Realtime (wallclock) timer for regular balances.
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See {manpage}systemd.time(7).
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'';
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};
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dataUsage = mkOption {
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type = with types; nullOr (ints.between 0 100);
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default = 10;
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description = ''
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Balance only data block groups with usage below the given percentage.
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'';
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};
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metadataUsage = mkOption {
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type = with types; nullOr (ints.between 0 100);
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default = 5;
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description = ''
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Balance only metadata block groups with usage below the given percentage.
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'';
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};
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};
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};
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};
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config = {
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systemd.services.btrfs-scrub = lib.mkIf (cfg.scrub.timer != null) {
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startAt = cfg.scrub.timer;
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unitConfig.ConditionACPower = true;
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serviceConfig = {
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Type = "exec";
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ExecStart = "${btrfs-scrub}/bin/btrfs-scrub";
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};
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};
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systemd.services.btrfs-balance = lib.mkIf (cfg.balance.timer != null) {
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startAt = cfg.balance.timer;
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unitConfig.ConditionACPower = true;
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serviceConfig = {
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Type = "exec";
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ExecStart = "${btrfs-balance}/bin/btrfs-balance";
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};
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};
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};
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}
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