···

       
268
       
 
       
          sw:

     

       
269
       
 
       
          let

     

       
270
       
 
       
            realDevice' = utils.escapeSystemdPath sw.realDevice;

     

       
0
       
 
       

     

       
271
       
 
       
          in

     

       
272
       
 
       
          lib.nameValuePair "mkswap-${sw.deviceName}" {

     

       
273
       
 
       
            description = "Initialisation of swap device ${sw.device}";

     
···

       
287
       
 
       
              pkgs.util-linux

     

       
288
       
 
       
              pkgs.e2fsprogs

     

       
289
       
 
       
            ]

     

       
0
       
 
       

     

       
290
       
 
       
            ++ lib.optional sw.randomEncryption.enable pkgs.cryptsetup;

     

       
291
       
 
       


     

       
292
       
 
       
            environment.DEVICE = sw.device;

     
···

       
295
       
 
       
              ${lib.optionalString (sw.size != null) ''

     

       
296
       
 
       
                currentSize=$(( $(stat -c "%s" "$DEVICE" 2>/dev/null || echo 0) / 1024 / 1024 ))

     

       
297
       
 
       
                if [[ ! -b "$DEVICE" && "${toString sw.size}" != "$currentSize" ]]; then

     

       
298
       
-
       
                  # Disable CoW for CoW based filesystems like BTRFS.

     

       
299
       
-
       
                  truncate --size 0 "$DEVICE"

     

       
300
       
-
       
                  chattr +C "$DEVICE" 2>/dev/null || true

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
301
       
 
       


     

       
302
       
-
       
                  echo "Creating swap file using dd and mkswap."

     

       
303
       
-
       
                  dd if=/dev/zero of="$DEVICE" bs=1M count=${toString sw.size} status=progress

     

       
304
       
-
       
                  ${lib.optionalString (!sw.randomEncryption.enable) "mkswap ${sw.realDevice}"}

     

       
0
       
 
       

     

       
305
       
 
       
                fi

     

       
306
       
 
       
              ''}

     

       
307
       
 
       
              ${lib.optionalString sw.randomEncryption.enable ''

     

···

       
268
       
 
       
          sw:

     

       
269
       
 
       
          let

     

       
270
       
 
       
            realDevice' = utils.escapeSystemdPath sw.realDevice;

     

       
271
       
+
       
            btrfsInSystem = config.boot.supportedFilesystems.btrfs or false;

     

       
272
       
 
       
          in

     

       
273
       
 
       
          lib.nameValuePair "mkswap-${sw.deviceName}" {

     

       
274
       
 
       
            description = "Initialisation of swap device ${sw.device}";

     
···

       
288
       
 
       
              pkgs.util-linux

     

       
289
       
 
       
              pkgs.e2fsprogs

     

       
290
       
 
       
            ]

     

       
291
       
+
       
            ++ lib.optional btrfsInSystem pkgs.btrfs-progs

     

       
292
       
 
       
            ++ lib.optional sw.randomEncryption.enable pkgs.cryptsetup;

     

       
293
       
 
       


     

       
294
       
 
       
            environment.DEVICE = sw.device;

     
···

       
297
       
 
       
              ${lib.optionalString (sw.size != null) ''

     

       
298
       
 
       
                currentSize=$(( $(stat -c "%s" "$DEVICE" 2>/dev/null || echo 0) / 1024 / 1024 ))

     

       
299
       
 
       
                if [[ ! -b "$DEVICE" && "${toString sw.size}" != "$currentSize" ]]; then

     

       
300
       
+
       
                  if [[ $(stat -f -c %T $(dirname "$DEVICE")) == "btrfs" ]]; then

     

       
301
       
+
       
                    # Use btrfs mkswapfile to speed up the creation of swapfile.

     

       
302
       
+
       
                    rm -f "$DEVICE"

     

       
303
       
+
       
                    btrfs filesystem mkswapfile --size "${toString sw.size}M" --uuid clear "$DEVICE"

     

       
304
       
+
       
                  else

     

       
305
       
+
       
                    # Disable CoW for CoW based filesystems.

     

       
306
       
+
       
                    truncate --size 0 "$DEVICE"

     

       
307
       
+
       
                    chattr +C "$DEVICE" 2>/dev/null || true

     

       
308
       
 
       


     

       
309
       
+
       
                    echo "Creating swap file using dd and mkswap."

     

       
310
       
+
       
                    dd if=/dev/zero of="$DEVICE" bs=1M count=${toString sw.size} status=progress

     

       
311
       
+
       
                    ${lib.optionalString (!sw.randomEncryption.enable) "mkswap ${sw.realDevice}"}

     

       
312
       
+
       
                  fi

     

       
313
       
 
       
                fi

     

       
314
       
 
       
              ''}

     

       
315
       
 
       
              ${lib.optionalString sw.randomEncryption.enable ''