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networking module: restructure wlanInterfaces
Restructure internals of networking.wlanInterfaces option to generate proper '.device' systemd targets for the WLAN interfaces.
This commit is contained in:
Thomas Strobel
parent
f99fbfd1dd
commit
d286ac5887
@ -46,51 +46,6 @@ let
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'';
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});
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# Collect all interfaces that are defined for a device
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# as device:interface key:value pairs.
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wlanDeviceInterfaces =
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let
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allDevices = unique (mapAttrsToList (_: v: v.device) cfg.wlanInterfaces);
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interfacesOfDevice = d: filterAttrs (_: v: v.device == d) cfg.wlanInterfaces;
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in
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genAttrs allDevices (d: interfacesOfDevice d);
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# Convert device:interface key:value pairs into a list, and if it exists,
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# place the interface which is named after the device at the beginning.
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wlanListDeviceFirst = device: interfaces:
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if hasAttr device interfaces
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then mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n==device) interfaces) ++ mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n!=device) interfaces)
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else mapAttrsToList (n: v: v // {_iName = n;}) interfaces;
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# udev script that configures a physical wlan device and adds virtual interfaces
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wlanDeviceUdevScript = device: interfaceList: pkgs.writeScript "wlan-${device}-udev-script" ''
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#!${pkgs.stdenv.shell}
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# Change the wireless phy device to a predictable name.
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if [ -e "/sys/class/net/${device}/phy80211/name" ]; then
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${pkgs.iw}/bin/iw phy `${pkgs.coreutils}/bin/cat /sys/class/net/${device}/phy80211/name` set name ${device} || true
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fi
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# Crate new, virtual interfaces and configure them at the same time
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${flip concatMapStrings (drop 1 interfaceList) (i: ''
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${pkgs.iw}/bin/iw dev ${device} interface add ${i._iName} type ${i.type} \
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${optionalString (i.type == "mesh" && i.meshID != null) "mesh_id ${i.meshID}"} \
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${optionalString (i.type == "monitor" && i.flags != null) "flags ${i.flags}"} \
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${optionalString (i.type == "managed" && i.fourAddr != null) "4addr ${if i.fourAddr then "on" else "off"}"} \
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${optionalString (i.mac != null) "addr ${i.mac}"}
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'')}
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# Reconfigure and rename the default interface that already exists
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${flip concatMapStrings (take 1 interfaceList) (i: ''
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${pkgs.iw}/bin/iw dev ${device} set type ${i.type}
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${optionalString (i.type == "mesh" && i.meshID != null) "${pkgs.iw}/bin/iw dev ${device} set meshid ${i.meshID}"}
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${optionalString (i.type == "monitor" && i.flags != null) "${pkgs.iw}/bin/iw dev ${device} set monitor ${i.flags}"}
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${optionalString (i.type == "managed" && i.fourAddr != null) "${pkgs.iw}/bin/iw dev ${device} set 4addr ${if i.fourAddr then "on" else "off"}"}
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${optionalString (i.mac != null) "${pkgs.iproute}/bin/ip link set dev ${device} address ${i.mac}"}
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${optionalString (device != i._iName) "${pkgs.iproute}/bin/ip link set dev ${device} name ${i._iName}"}
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'')}
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'';
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# We must escape interfaces due to the systemd interpretation
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subsystemDevice = interface:
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"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
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@ -997,19 +952,76 @@ in
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(pkgs.writeTextFile {
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name = "99-zzz-wlanInterfaces-last.rules";
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destination = "/etc/udev/rules.d/99-zzz-wlanInterfaces-last.rules";
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text = ''
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# If persistent udev device name is not used for an interface, then do not
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# call systemd for that udev device name and only execute the script that
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# modifies or prepares the WLAN interfaces. All other commands that would
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# otherwise be executed when the udev device is added, like, e.g., the calling
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# of systemd-sysctl or the activation of wpa_supplicant is disabled when the
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# persistend udev device name is not usef for an interface.
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${flip (concatMapStringsSep "\n") (attrNames wlanDeviceInterfaces) (device:
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let script = wlanDeviceUdevScript device (wlanListDeviceFirst device wlanDeviceInterfaces."${device}"); in
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if hasAttr device cfg.wlanInterfaces
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then ''ACTION=="add", SUBSYSTEM=="net", NAME=="${device}", ENV{DEVTYPE}=="wlan", RUN+="${script}"''
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else ''ACTION=="add", SUBSYSTEM=="net", NAME=="${device}", ENV{DEVTYPE}=="wlan", NAME="", TAG-="systemd", RUN:="${script}"'')}
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text =
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let
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# Collect all interfaces that are defined for a device
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# as device:interface key:value pairs.
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wlanDeviceInterfaces =
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let
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allDevices = unique (mapAttrsToList (_: v: v.device) cfg.wlanInterfaces);
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interfacesOfDevice = d: filterAttrs (_: v: v.device == d) cfg.wlanInterfaces;
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in
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genAttrs allDevices (d: interfacesOfDevice d);
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# Convert device:interface key:value pairs into a list, and if it exists,
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# place the interface which is named after the device at the beginning.
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wlanListDeviceFirst = device: interfaces:
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if hasAttr device interfaces
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then mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n==device) interfaces) ++ mapAttrsToList (n: v: v//{_iName=n;}) (filterAttrs (n: _: n!=device) interfaces)
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else mapAttrsToList (n: v: v // {_iName = n;}) interfaces;
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# Udev script to execute for the default WLAN interface with the persistend udev name.
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# The script creates the required, new WLAN interfaces interfaces and configures the
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# existing, default interface.
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curInterfaceScript = device: current: new: pkgs.writeScript "udev-run-script-wlan-interfaces-${device}.sh" ''
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#!${pkgs.stdenv.shell}
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# Change the wireless phy device to a predictable name.
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${pkgs.iw}/bin/iw phy `${pkgs.coreutils}/bin/cat /sys/class/net/$INTERFACE/phy80211/name` set name ${device}
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# Add new WLAN interfaces
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${flip concatMapStrings new (i: ''
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${pkgs.iw}/bin/iw phy ${device} interface add ${i._iName} type managed
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'')}
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# Configure the current interface
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${pkgs.iw}/bin/iw dev ${device} set type ${current.type}
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${optionalString (current.type == "mesh" && current.meshID!=null) "${pkgs.iw}/bin/iw dev ${device} set meshid ${current.meshID}"}
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${optionalString (current.type == "monitor" && current.flags!=null) "${pkgs.iw}/bin/iw dev ${device} set monitor ${current.flags}"}
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${optionalString (current.type == "managed" && current.fourAddr!=null) "${pkgs.iw}/bin/iw dev ${device} set 4addr ${if current.fourAddr then "on" else "off"}"}
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${optionalString (current.mac != null) "${pkgs.iproute}/bin/ip link set dev ${device} address ${current.mac}"}
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'';
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# Udev script to execute for a new WLAN interface. The script configures the new WLAN interface.
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newInterfaceScript = new: pkgs.writeScript "udev-run-script-wlan-interfaces-${new._iName}.sh" ''
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#!${pkgs.stdenv.shell}
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# Configure the new interface
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${pkgs.iw}/bin/iw dev ${new._iName} set type ${new.type}
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${optionalString (new.type == "mesh" && new.meshID!=null) "${pkgs.iw}/bin/iw dev ${device} set meshid ${new.meshID}"}
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${optionalString (new.type == "monitor" && new.flags!=null) "${pkgs.iw}/bin/iw dev ${device} set monitor ${new.flags}"}
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${optionalString (new.type == "managed" && new.fourAddr!=null) "${pkgs.iw}/bin/iw dev ${device} set 4addr ${if new.fourAddr then "on" else "off"}"}
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${optionalString (new.mac != null) "${pkgs.iproute}/bin/ip link set dev ${device} address ${new.mac}"}
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'';
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# Udev attributes for systemd to name the device and to create a .device target.
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systemdAttrs = n: ''NAME:="${n}", ENV{INTERFACE}:="${n}", ENV{SYSTEMD_ALIAS}:="/sys/subsystem/net/devices/${n}", TAG+="systemd"'';
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in
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flip (concatMapStringsSep "\n") (attrNames wlanDeviceInterfaces) (device:
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let
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interfaces = wlanListDeviceFirst device wlanDeviceInterfaces."${device}";
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curInterface = elemAt interfaces 0;
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newInterfaces = drop 1 interfaces;
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in ''
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# It is important to have that rule first as overwriting the NAME attribute also prevents the
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# next rules from matching.
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${flip (concatMapStringsSep "\n") (wlanListDeviceFirst device wlanDeviceInterfaces."${device}") (interface:
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''ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", ENV{INTERFACE}=="${interface._iName}", ${systemdAttrs interface._iName}, RUN+="${newInterfaceScript interface}"'')}
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# Add the required, new WLAN interfaces to the default WLAN interface with the
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# persistent, default name as assigned by udev.
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ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", NAME=="${device}", ${systemdAttrs curInterface._iName}, RUN+="${curInterfaceScript device curInterface newInterfaces}"
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# Generate the same systemd events for both 'add' and 'move' udev events.
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ACTION=="move", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", NAME=="${device}", ${systemdAttrs curInterface._iName}
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'');
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}) ];
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};
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