unofficial mirror of bug-guix@gnu.org 
 help / color / mirror / code / Atom feed
blob fffd5abf3b0402bee62dbcf2994974a651c5b87a 55363 bytes (raw)
name: gnu/installer/parted.scm 	 # note: path name is non-authoritative(*)

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
 
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu installer parted)
  #:use-module (gnu installer steps)
  #:use-module (gnu installer utils)
  #:use-module (gnu installer newt page)
  #:use-module (gnu system uuid)
  #:use-module ((gnu build file-systems)
                #:select (read-partition-uuid
                          read-luks-partition-uuid))
  #:use-module ((gnu build linux-modules)
                #:select (missing-modules))
  #:use-module ((gnu system linux-initrd)
                #:select (%base-initrd-modules))
  #:use-module (guix build syscalls)
  #:use-module (guix build utils)
  #:use-module (guix records)
  #:use-module (guix utils)
  #:use-module (guix i18n)
  #:use-module (parted)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:use-module (rnrs io ports)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:export (<user-partition>
            user-partition
            make-user-partition
            user-partition?
            user-partition-name
            user-partition-type
            user-partition-file-name
            user-partition-disk-file-name
            user-partition-crypt-label
            user-partition-crypt-password
            user-partition-fs-type
            user-partition-bootable?
            user-partition-esp?
            user-partition-bios-grub?
            user-partition-size
            user-partition-start
            user-partition-end
            user-partition-mount-point
            user-partition-need-formatting?
            user-partition-parted-object

            find-esp-partition
            small-freespace-partition?
            esp-partition?
            boot-partition?
            default-esp-mount-point

            with-delay-device-in-use?
            force-device-sync
            non-install-devices
            partition-user-type
            user-fs-type-name
            partition-filesystem-user-type
            partition-get-flags
            partition->user-partition
            create-special-user-partitions
            find-user-partition-by-parted-object

            device-description
            partition-end-formatted
            partition-print-number
            partition-description
            partitions-descriptions
            user-partition-description

            &max-primary-exceeded
            max-primary-exceeded?
            &extended-creation-error
            extended-creation-error?
            &logical-creation-error
            logical-creation-error?

            can-create-partition?
            mklabel
            mkpart
            rmpart

            auto-partition!

            &no-root-mount-point
            no-root-mount-point?

            check-user-partitions
            set-user-partitions-file-name
            format-user-partitions
            mount-user-partitions
            umount-user-partitions
            with-mounted-partitions
            user-partitions->file-systems
            user-partitions->configuration

            init-parted
            free-parted))

\f
;;;
;;; Partition record.
;;;

(define-record-type* <user-partition>
  user-partition make-user-partition
  user-partition?
  (name                 user-partition-name ;string
                        (default #f))
  (type                 user-partition-type
                        (default 'normal)) ; 'normal | 'logical | 'extended
  (file-name            user-partition-file-name
                        (default #f))
  (disk-file-name       user-partition-disk-file-name
                        (default #f))
  (crypt-label          user-partition-crypt-label
                        (default #f))
  (crypt-password       user-partition-crypt-password
                        (default #f))
  (fs-type              user-partition-fs-type
                        (default 'ext4))
  (bootable?            user-partition-bootable?
                        (default #f))
  (esp?                 user-partition-esp?
                        (default #f))
  (bios-grub?           user-partition-bios-grub?
                        (default #f))
  (size                 user-partition-size
                        (default #f))
  (start                user-partition-start ;start as string (e.g. '11MB')
                        (default #f))
  (end                  user-partition-end ;same as start
                        (default #f))
  (mount-point          user-partition-mount-point ;string
                        (default #f))
  (need-formatting?     user-partition-need-formatting? ; boolean
                        (default #f))
  (parted-object        user-partition-parted-object ; <partition> from parted
                        (default #f)))

\f
;;
;; Utilities.
;;

(define (find-esp-partition partitions)
  "Find and return the ESP partition among PARTITIONS."
  (find esp-partition? partitions))

(define* (small-freespace-partition? device
                                     partition
                                     #:key (max-size MEBIBYTE-SIZE))
  "Return #t is PARTITION is a free-space partition with less a size strictly
inferior to MAX-SIZE, #f otherwise."
  (let ((size (partition-length partition))
        (max-sector-size (/ max-size
                            (device-sector-size device))))
    (< size max-sector-size)))

(define (partition-user-type partition)
  "Return the type of PARTITION, to be stored in the TYPE field of
<user-partition> record. It can be 'normal, 'extended or 'logical."
  (cond ((normal-partition? partition)
         'normal)
        ((extended-partition? partition)
         'extended)
        ((logical-partition? partition)
         'logical)
        (else #f)))

(define (esp-partition? partition)
  "Return #t if partition has the ESP flag, return #f otherwise."
  (let* ((disk (partition-disk partition))
         (disk-type (disk-disk-type disk))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED)))
    (and (data-partition? partition)
         (not has-extended?)
         (partition-is-flag-available? partition PARTITION-FLAG-ESP)
         (partition-get-flag partition PARTITION-FLAG-ESP))))

(define (boot-partition? partition)
  "Return #t if partition has the boot flag, return #f otherwise."
  (and (data-partition? partition)
       (partition-is-flag-available? partition PARTITION-FLAG-BOOT)
       (partition-get-flag partition PARTITION-FLAG-BOOT)))


;; The default mount point for ESP partitions.
(define default-esp-mount-point
  (make-parameter "/boot/efi"))

(define (efi-installation?)
  "Return #t if an EFI installation should be performed, #f otherwise."
  (file-exists? "/sys/firmware/efi"))

(define (user-fs-type-name fs-type)
  "Return the name of FS-TYPE as specified by libparted."
  (case fs-type
    ((ext4)  "ext4")
    ((btrfs) "btrfs")
    ((fat16) "fat16")
    ((fat32) "fat32")
    ((jfs)   "jfs")
    ((ntfs)  "ntfs")
    ((swap)  "linux-swap")))

(define (user-fs-type->mount-type fs-type)
  "Return the mount type of FS-TYPE."
  (case fs-type
    ((ext4)  "ext4")
    ((btrfs) "btrfs")
    ((fat16) "fat")
    ((fat32) "vfat")
    ((jfs)   "jfs")
    ((ntfs)  "ntfs")))

(define (partition-filesystem-user-type partition)
  "Return the filesystem type of PARTITION, to be stored in the FS-TYPE field
of <user-partition> record."
  (let ((fs-type (partition-fs-type partition)))
    (and fs-type
         (let ((name (filesystem-type-name fs-type)))
           (cond
            ((string=? name "ext4") 'ext4)
            ((string=? name "btrfs") 'btrfs)
            ((string=? name "fat16") 'fat16)
            ((string=? name "fat32") 'fat32)
            ((string=? name "jfs") 'jfs)
            ((string=? name "ntfs") 'ntfs)
            ((or (string=? name "swsusp")
                 (string=? name "linux-swap(v0)")
                 (string=? name "linux-swap(v1)"))
             'swap)
            (else
             (error (format #f "Unhandled ~a fs-type~%" name))))))))

(define (partition-get-flags partition)
  "Return the list of flags supported by the given PARTITION."
  (filter-map (lambda (flag)
                (and (partition-get-flag partition flag)
                     flag))
              (partition-flags partition)))

(define (partition->user-partition partition)
  "Convert PARTITION into a <user-partition> record and return it."
  (let* ((disk (partition-disk partition))
         (device (disk-device disk))
         (disk-type (disk-disk-type disk))
         (has-name? (disk-type-check-feature
                     disk-type
                     DISK-TYPE-FEATURE-PARTITION-NAME))
         (name (and has-name?
                    (data-partition? partition)
                    (partition-get-name partition))))
    (user-partition
     (name (and (and name
                     (not (string=? name "")))
                name))
     (type (or (partition-user-type partition)
               'normal))
     (file-name (partition-get-path partition))
     (disk-file-name (device-path device))
     (fs-type (or (partition-filesystem-user-type partition)
                  'ext4))
     (mount-point (and (esp-partition? partition)
                       (default-esp-mount-point)))
     (bootable? (boot-partition? partition))
     (esp? (esp-partition? partition))
     (parted-object partition))))

(define (create-special-user-partitions partitions)
  "Return a list with a <user-partition> record describing the ESP partition
found in PARTITIONS, if any."
  (filter-map (lambda (partition)
                (and (esp-partition? partition)
                     (partition->user-partition partition)))
              partitions))

(define (find-user-partition-by-parted-object user-partitions
                                              partition)
  "Find and return the <user-partition> record in USER-PARTITIONS list which
PARTED-OBJECT field equals PARTITION, return #f if not found."
  (find (lambda (user-partition)
          (equal? (user-partition-parted-object user-partition)
                  partition))
        user-partitions))

\f
;;
;; Devices
;;

(define (with-delay-device-in-use? file-name)
  "Call DEVICE-IN-USE? with a few retries, as the first re-read will often
fail. See rereadpt function in wipefs.c of util-linux for an explanation."
  ;; Kernel always return EINVAL for BLKRRPART on loopdevices.
  (and (not (string-match "/dev/loop*" file-name))
       (let loop ((try 4))
         (usleep 250000)
         (let ((in-use? (device-in-use? file-name)))
           (if (and in-use? (> try 0))
               (loop (- try 1))
               in-use?)))))

(define* (force-device-sync device)
  "Force a flushing of the given DEVICE."
  (device-open device)
  (device-sync device)
  (device-close device))

(define (remove-logical-devices)
  "Remove all active logical devices."
  (with-null-output-ports
   (invoke "dmsetup" "remove_all")))

(define (non-install-devices)
  "Return all the available devices, except the busy one, allegedly the
install device. DEVICE-IS-BUSY? is a parted call, checking if the device is
mounted. The install image uses an overlayfs so the install device does not
appear as mounted and won't be considered as busy. So use also DEVICE-IN-USE?
from (guix build syscalls) module, who will try to re-read the device's
partition table to determine whether or not it is already used (like sfdisk
from util-linux)."
  (remove (lambda (device)
            (let ((file-name (device-path device)))
              (or (device-is-busy? device)
                  (with-delay-device-in-use? file-name))))
          (devices)))

\f
;;
;; Disk and partition printing.
;;

(define* (device-description device #:optional disk)
  "Return a string describing the given DEVICE."
  (let* ((type (device-type device))
         (file-name (device-path device))
         (model (device-model device))
         (type-str (device-type->string type))
         (disk-type (if disk
                        (disk-disk-type disk)
                        (disk-probe device)))
         (length (device-length device))
         (sector-size (device-sector-size device))
         (end (unit-format-custom-byte device
                                       (* length sector-size)
                                       UNIT-GIGABYTE)))
    (string-join
     `(,@(if (string=? model "")
             `(,type-str)
             `(,model ,(string-append "(" type-str ")")))
       ,file-name
       ,end
       ,@(if disk-type
             `(,(disk-type-name disk-type))
             '()))
     " ")))

(define (partition-end-formatted device partition)
  "Return as a string the end of PARTITION with the relevant unit."
  (unit-format-byte
   device
   (-
    (* (+ (partition-end partition) 1)
       (device-sector-size device))
    1)))

(define (partition-print-number partition)
  "Convert the given partition NUMBER to string."
  (let ((number (partition-number partition)))
    (number->string number)))

(define (partition-description partition user-partition)
  "Return a string describing the given PARTITION, located on the DISK of
DEVICE."

  (define (partition-print-type partition)
    "Return the type of PARTITION as a string."
    (if (freespace-partition? partition)
        (G_ "Free space")
        (let ((type (partition-type partition)))
          (match type
            ((type-symbol)
             (symbol->string type-symbol))))))

  (define (partition-print-flags partition)
    "Return the flags of PARTITION as a string of comma separated flags."
    (string-join
     (filter-map
      (lambda (flag)
        (and (partition-get-flag partition flag)
             (partition-flag-get-name flag)))
      (partition-flags partition))
     ","))

  (define (maybe-string-pad string length)
    "Returned a string formatted by padding STRING of LENGTH characters to the
right. If STRING is #f use an empty string."
    (if (and string (not (string=? string "")))
        (string-pad-right string length)
        ""))

  (let* ((disk (partition-disk partition))
         (device (disk-device disk))
         (disk-type (disk-disk-type disk))
         (has-name? (disk-type-check-feature
                     disk-type
                     DISK-TYPE-FEATURE-PARTITION-NAME))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED))
         (part-type (partition-print-type partition))
         (number (and (not (freespace-partition? partition))
                      (partition-print-number partition)))
         (name (and has-name?
                    (if (freespace-partition? partition)
                        (G_ "Free space")
                        (partition-get-name partition))))
         (start (unit-format device
                             (partition-start partition)))
         (end (partition-end-formatted device partition))
         (size (unit-format device (partition-length partition)))
         (fs-type (partition-fs-type partition))
         (fs-type-name (and fs-type
                            (filesystem-type-name fs-type)))
         (crypt-label (and user-partition
                           (user-partition-crypt-label user-partition)))
         (flags (and (not (freespace-partition? partition))
                     (partition-print-flags partition)))
         (mount-point (and user-partition
                           (user-partition-mount-point user-partition))))
    `(,(or number "")
      ,@(if has-extended?
            (list part-type)
            '())
      ,size
      ,(or fs-type-name "")
      ,(or flags "")
      ,(or mount-point "")
      ,(or crypt-label "")
      ,(maybe-string-pad name 30))))

(define (partitions-descriptions partitions user-partitions)
  "Return a list of strings describing all the partitions found on
DEVICE. METADATA partitions are not described. The strings are padded to the
right so that they can be displayed as a table."

  (define (max-length-column lists column-index)
    "Return the maximum length of the string at position COLUMN-INDEX in the
list of string lists LISTS."
    (apply max
           (map (lambda (list)
                  (string-length
                   (list-ref list column-index)))
                lists)))

  (define (pad-descriptions descriptions)
    "Return a padded version of the list of string lists DESCRIPTIONS. The
strings are padded to the length of the longer string in a same column, as
determined by MAX-LENGTH-COLUMN procedure."
    (let* ((description-length (length (car descriptions)))
           (paddings (map (lambda (index)
                            (max-length-column descriptions index))
                          (iota description-length))))
      (map (lambda (description)
             (map string-pad-right description paddings))
           descriptions)))

  (let* ((descriptions
          (map
           (lambda (partition)
             (let ((user-partition
                    (find-user-partition-by-parted-object user-partitions
                                                          partition)))
               (partition-description partition user-partition)))
           partitions))
         (padded-descriptions (if (null? partitions)
                                  '()
                                  (pad-descriptions descriptions))))
    (map (cut string-join <> " ") padded-descriptions)))

(define (user-partition-description user-partition)
  "Return a string describing the given USER-PARTITION record."
  (let* ((partition (user-partition-parted-object user-partition))
         (disk (partition-disk partition))
         (disk-type (disk-disk-type disk))
         (device (disk-device disk))
         (has-name? (disk-type-check-feature
                     disk-type
                     DISK-TYPE-FEATURE-PARTITION-NAME))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED))
         (name (user-partition-name user-partition))
         (type (user-partition-type user-partition))
         (type-name (symbol->string type))
         (fs-type (user-partition-fs-type user-partition))
         (fs-type-name (user-fs-type-name fs-type))
         (bootable? (user-partition-bootable? user-partition))
         (esp? (user-partition-esp? user-partition))
         (need-formatting? (user-partition-need-formatting? user-partition))
         (crypt-label (user-partition-crypt-label user-partition))
         (size (user-partition-size user-partition))
         (mount-point (user-partition-mount-point user-partition)))
    `(,@(if has-name?
            `((name . ,(string-append "Name: " (or name "None"))))
            '())
      ,@(if (and has-extended?
                 (freespace-partition? partition)
                 (not (eq? type 'logical)))
            `((type . ,(string-append "Type: " type-name)))
            '())
      ,@(if (eq? type 'extended)
            '()
            `((fs-type . ,(string-append "Filesystem type: " fs-type-name))))
      ,@(if (or (eq? type 'extended)
                (eq? fs-type 'swap)
                (not has-extended?))
            '()
            `((bootable . ,(string-append "Bootable flag: "
                                          (if bootable? "On" "Off")))))
      ,@(if (and (not has-extended?)
                 (not (eq? fs-type 'swap)))
            `((esp? . ,(string-append "ESP flag: "
                                      (if esp? "On" "Off"))))
            '())
      ,@(if (freespace-partition? partition)
            (let ((size-formatted
                   (or size (unit-format device
                                         (partition-length partition)))))
              `((size . ,(string-append "Size : " size-formatted))))
            '())
      ,@(if (or (eq? type 'extended)
                (eq? fs-type 'swap))
            '()
            `((crypt-label
               . ,(string-append
                   "Encryption: "
                   (if crypt-label
                       (format #f "Yes (label ~a)" crypt-label)
                       "No")))))
      ,@(if (or (freespace-partition? partition)
                (eq? fs-type 'swap))
            '()
            `((need-formatting?
               . ,(string-append "Format the partition? : "
                                 (if need-formatting? "Yes" "No")))))
      ,@(if (or (eq? type 'extended)
                (eq? fs-type 'swap))
            '()
            `((mount-point
               . ,(string-append "Mount point : "
                                 (or mount-point
                                     (and esp? (default-esp-mount-point))
                                     "None"))))))))

\f
;;
;; Partition table creation.
;;

(define (mklabel device type-name)
  "Create a partition table on DEVICE. TYPE-NAME is the type of the partition
table, \"msdos\" or \"gpt\"."
  (let ((type (disk-type-get type-name)))
    (disk-new-fresh device type)))

\f
;;
;; Partition creation.
;;

;; The maximum count of primary partitions is exceeded.
(define-condition-type &max-primary-exceeded &condition
  max-primary-exceeded?)

;; It is not possible to create an extended partition.
(define-condition-type &extended-creation-error &condition
  extended-creation-error?)

;; It is not possible to create a logical partition.
(define-condition-type &logical-creation-error &condition
  logical-creation-error?)

(define (can-create-primary? disk)
  "Return #t if it is possible to create a primary partition on DISK, return
#f otherwise."
  (let ((max-primary (disk-get-max-primary-partition-count disk)))
    (find (lambda (number)
            (not (disk-get-partition disk number)))
          (iota max-primary 1))))

(define (can-create-extended? disk)
  "Return #t if it is possible to create an extended partition on DISK, return
#f otherwise."
  (let* ((disk-type (disk-disk-type disk))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED)))
    (and (can-create-primary? disk)
         has-extended?
         (not (disk-extended-partition disk)))))

(define (can-create-logical? disk)
  "Return #t is it is possible to create a logical partition on DISK, return
#f otherwise."
  (let* ((disk-type (disk-disk-type disk))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED)))
    (and has-extended?
         (disk-extended-partition disk))))

(define (can-create-partition? user-part)
  "Return #t if it is possible to create the given USER-PART record, return #f
otherwise."
  (let* ((type (user-partition-type user-part))
         (partition (user-partition-parted-object user-part))
         (disk (partition-disk partition)))
    (case type
      ((normal)
       (or (can-create-primary? disk)
           (raise
            (condition (&max-primary-exceeded)))))
      ((extended)
       (or (can-create-extended? disk)
           (raise
            (condition (&extended-creation-error)))))
      ((logical)
       (or (can-create-logical? disk)
           (raise
            (condition (&logical-creation-error))))))))

(define* (mkpart disk user-partition
                 #:key (previous-partition #f))
  "Create the given USER-PARTITION on DISK. The PREVIOUS-PARTITION argument as
to be set to the partition preceding USER-PARTITION if any."

  (define (parse-start-end start end)
    "Parse start and end strings as positions on DEVICE expressed with a unit,
like '100GB' or '12.2KiB'. Return a list of 4 elements, the start sector, its
range (1 unit large area centered on start sector), the end sector and its
range."
    (let ((device (disk-device disk)))
      (call-with-values
          (lambda ()
            (unit-parse start device))
        (lambda (start-sector start-range)
          (call-with-values
              (lambda ()
                (unit-parse end device))
            (lambda (end-sector end-range)
              (list start-sector start-range
                    end-sector end-range)))))))

  (define* (extend-ranges! start-range end-range
                           #:key (offset 0))
    "Try to extend START-RANGE by 1 MEBIBYTE to the right and END-RANGE by 1
MEBIBYTE to the left. This way, if the disk is aligned on 2048 sectors of
512KB (like frequently), we will have a chance for the
'optimal-align-constraint' to succeed. Do not extend ranges if that would
cause them to cross."
    (let* ((device (disk-device disk))
           (start-range-end (geometry-end start-range))
           (end-range-start (geometry-start end-range))
           (mebibyte-sector-size (/ MEBIBYTE-SIZE
                                    (device-sector-size device)))
           (new-start-range-end
            (+ start-range-end mebibyte-sector-size offset))
           (new-end-range-start
            (- end-range-start mebibyte-sector-size offset)))
      (when (< new-start-range-end new-end-range-start)
        (geometry-set-end start-range new-start-range-end)
        (geometry-set-start end-range new-end-range-start))))

  (match (parse-start-end (user-partition-start user-partition)
                          (user-partition-end user-partition))
    ((start-sector start-range end-sector end-range)
     (let* ((prev-end (if previous-partition
                          (partition-end previous-partition)
                          0))
            (start-distance (- start-sector prev-end))
            (type (user-partition-type user-partition))
            ;; There should be at least 2 unallocated sectors in front of each
            ;; logical partition, otherwise parted will fail badly:
            ;; https://gparted.org/h2-fix-msdos-pt.php#apply-action-fail.
            (start-offset (if previous-partition
                              (- 3 start-distance)
                              0))
            (start-sector* (if (and (eq? type 'logical)
                                    (< start-distance 3))
                               (+ start-sector start-offset)
                               start-sector)))
       ;; This is a hack.  Parted almost always fails to create optimally
       ;; aligned partitions (unless specifying percentages) because the
       ;; default range of 1MB centered on the start sector is not enough when
       ;; the optimal alignment is 2048 sectors of 512KB.
       (extend-ranges! start-range end-range #:offset start-offset)

       (let* ((device (disk-device disk))
              (disk-type (disk-disk-type disk))
              (length (device-length device))
              (name (user-partition-name user-partition))
              (filesystem-type
               (filesystem-type-get
                (user-fs-type-name
                 (user-partition-fs-type user-partition))))
              (flags `(,@(if (user-partition-bootable? user-partition)
                             `(,PARTITION-FLAG-BOOT)
                             '())
                       ,@(if (user-partition-esp? user-partition)
                             `(,PARTITION-FLAG-ESP)
                             '())
                       ,@(if (user-partition-bios-grub? user-partition)
                             `(,PARTITION-FLAG-BIOS-GRUB)
                             '())))
              (has-name? (disk-type-check-feature
                          disk-type
                          DISK-TYPE-FEATURE-PARTITION-NAME))
              (partition-type (partition-type->int type))
              (partition (partition-new disk
                                        #:type partition-type
                                        #:filesystem-type filesystem-type
                                        #:start start-sector*
                                        #:end end-sector))
              (user-constraint (constraint-new
                                #:start-align 'any
                                #:end-align 'any
                                #:start-range start-range
                                #:end-range end-range
                                #:min-size 1
                                #:max-size length))
              (dev-constraint
               (device-get-optimal-aligned-constraint device))
              (final-constraint (constraint-intersect user-constraint
                                                      dev-constraint))
              (no-constraint (constraint-any device))
              ;; Try to create a partition with an optimal alignment
              ;; constraint. If it fails, fallback to creating a partition with
              ;; no specific constraint.
              (partition-ok?
               (or (disk-add-partition disk partition final-constraint)
                   (disk-add-partition disk partition no-constraint))))
         ;; Set the partition name if supported.
         (when (and partition-ok? has-name? name)
           (partition-set-name partition name))

         ;; Set flags is required.
         (for-each (lambda (flag)
                     (and (partition-is-flag-available? partition flag)
                          (partition-set-flag partition flag 1)))
                   flags)

         (and partition-ok?
              (partition-set-system partition filesystem-type)
              partition))))))

\f
;;
;; Partition destruction.
;;

(define (rmpart disk number)
  "Remove the partition with the given NUMBER on DISK."
  (let ((partition (disk-get-partition disk number)))
    (disk-remove-partition* disk partition)))

\f
;;
;; Auto partitionning.
;;

(define* (create-adjacent-partitions! disk partitions
                                      #:key (last-partition-end 0))
  "Create the given PARTITIONS on DISK. LAST-PARTITION-END is the sector from
which we want to start creating partitions. The START and END of each created
partition are computed from its SIZE value and the position of the last
partition."
  (let ((device (disk-device disk)))
    (let loop ((partitions partitions)
               (remaining-space (- (device-length device)
                                   last-partition-end))
               (start last-partition-end))
      (match partitions
        (() '())
        ((partition . rest)
         (let* ((size (user-partition-size partition))
                (percentage-size (and (string? size)
                                      (read-percentage size)))
                (sector-size (device-sector-size device))
                (partition-size (if percentage-size
                                    (exact->inexact
                                     (* (/ percentage-size 100)
                                        remaining-space))
                                    size))
                (end-partition (min (- (device-length device) 1)
                                    (nearest-exact-integer
                                     (+ start partition-size 1))))
                (name (user-partition-name partition))
                (type (user-partition-type partition))
                (fs-type (user-partition-fs-type partition))
                (start-formatted (unit-format-custom device
                                                     start
                                                     UNIT-SECTOR))
                (end-formatted (unit-format-custom device
                                                   end-partition
                                                   UNIT-SECTOR))
                (new-user-partition (user-partition
                                     (inherit partition)
                                     (start start-formatted)
                                     (end end-formatted)))
                (new-partition
                 (mkpart disk new-user-partition)))
           (if new-partition
               (cons (user-partition
                      (inherit new-user-partition)
                      (file-name (partition-get-path new-partition))
                      (disk-file-name (device-path device))
                      (parted-object new-partition))
                     (loop rest
                           (if (eq? type 'extended)
                               remaining-space
                               (- remaining-space
                                  (partition-length new-partition)))
                           (if (eq? type 'extended)
                               (+ start 1)
                               (+ (partition-end new-partition) 1))))
               (error
                (format #f "Unable to create partition ~a~%" name)))))))))

(define (force-user-partitions-formatting user-partitions)
  "Set the NEED-FORMATING? fields to #t on all <user-partition> records of
USER-PARTITIONS list and return the updated list."
  (map (lambda (p)
         (user-partition
          (inherit p)
          (need-formatting? #t)))
       user-partitions))

(define* (auto-partition! disk
                          #:key
                          (scheme 'entire-root))
  "Automatically create partitions on DISK. All the previous
partitions (except the ESP on a GPT disk, if present) are wiped. SCHEME is the
desired partitioning scheme. It can be 'entire-root or
'entire-root-home. 'entire-root will create a swap partition and a root
partition occupying all the remaining space. 'entire-root-home will create a
swap partition, a root partition and a home partition.

Return the complete list of partitions on DISK, including the ESP when it
exists."
  (let* ((device (disk-device disk))
         (disk-type (disk-disk-type disk))
         (has-extended? (disk-type-check-feature
                         disk-type
                         DISK-TYPE-FEATURE-EXTENDED))
         (partitions (filter data-partition? (disk-partitions disk)))
         (esp-partition (find-esp-partition partitions))
         ;; According to
         ;; https://wiki.archlinux.org/index.php/EFI_system_partition, the ESP
         ;; size should be at least 550MiB.
         (new-esp-size (nearest-exact-integer
                        (/ (* 550 MEBIBYTE-SIZE)
                           (device-sector-size device))))
         (end-esp-partition (and esp-partition
                                 (partition-end esp-partition)))
         (non-boot-partitions (remove esp-partition? partitions))
         (bios-grub-size (/ (* 3 MEBIBYTE-SIZE)
                            (device-sector-size device)))
         (five-percent-disk (nearest-exact-integer
                             (* 0.05 (device-length device))))
         (default-swap-size (nearest-exact-integer
                             (/ (* 4 GIGABYTE-SIZE)
                                (device-sector-size device))))
         ;; Use a 4GB size for the swap if it represents less than 5% of the
         ;; disk space. Otherwise, set the swap size to 5% of the disk space.
         (swap-size (min default-swap-size five-percent-disk)))

    (if has-extended?
        ;; msdos - remove everything.
        (disk-remove-all-partitions disk)
        ;; gpt - remove everything but esp if it exists.
        (for-each
         (lambda (partition)
           (and (data-partition? partition)
                (disk-remove-partition* disk partition)))
         non-boot-partitions))

    (let* ((start-partition
            (and (not has-extended?)
                 (if (efi-installation?)
                     (and (not esp-partition)
                          (user-partition
                           (fs-type 'fat32)
                           (esp? #t)
                           (size new-esp-size)
                           (mount-point (default-esp-mount-point))))
                     (user-partition
                      (fs-type 'ext4)
                      (bootable? #t)
                      (bios-grub? #t)
                      (size bios-grub-size)))))
           (new-partitions
            (cond
             ((or (eq? scheme 'entire-root)
                  (eq? scheme 'entire-encrypted-root))
              (let ((encrypted? (eq? scheme 'entire-encrypted-root)))
                `(,@(if start-partition
                        `(,start-partition)
                        '())
                  ,@(if encrypted?
                        '()
                        `(,(user-partition
                            (fs-type 'swap)
                            (size swap-size))))
                  ,(user-partition
                    (fs-type 'ext4)
                    (bootable? has-extended?)
                    (crypt-label (and encrypted? "cryptroot"))
                    (size "100%")
                    (mount-point "/")))))
             ((or (eq? scheme 'entire-root-home)
                  (eq? scheme 'entire-encrypted-root-home))
              (let ((encrypted? (eq? scheme 'entire-encrypted-root-home)))
                `(,@(if start-partition
                        `(,start-partition)
                        '())
                  ,(user-partition
                    (fs-type 'ext4)
                    (bootable? has-extended?)
                    (crypt-label (and encrypted? "cryptroot"))
                    (size "33%")
                    (mount-point "/"))
                  ,@(if has-extended?
                        `(,(user-partition
                            (type 'extended)
                            (size "100%")))
                        '())
                  ,@(if encrypted?
                        '()
                        `(,(user-partition
                            (type (if has-extended?
                                      'logical
                                      'normal))
                            (fs-type 'swap)
                            (size swap-size))))
                  ,(user-partition
                    (type (if has-extended?
                              'logical
                              'normal))
                    (fs-type 'ext4)
                    (crypt-label (and encrypted? "crypthome"))
                    (size "100%")
                    (mount-point "/home")))))))
           (new-partitions* (force-user-partitions-formatting
                             new-partitions)))
      (append (if esp-partition
                  (list (partition->user-partition esp-partition))
                  '())
              (create-adjacent-partitions! disk
                                           new-partitions*
                                           #:last-partition-end
                                           (or end-esp-partition 0))))))

\f
;;
;; Convert user-partitions.
;;

;; No root mount point found.
(define-condition-type &no-root-mount-point &condition
  no-root-mount-point?)

(define (check-user-partitions user-partitions)
  "Return #t if the USER-PARTITIONS lists contains one <user-partition> record
with a mount-point set to '/', raise &no-root-mount-point condition
otherwise."
  (let ((mount-points
         (map user-partition-mount-point user-partitions)))
    (or (member "/" mount-points)
        (raise
         (condition (&no-root-mount-point))))))

(define (set-user-partitions-file-name user-partitions)
  "Set the partition file-name of <user-partition> records in USER-PARTITIONS
list and return the updated list."
  (map (lambda (p)
         (let* ((partition (user-partition-parted-object p))
                (file-name (partition-get-path partition)))
           (user-partition
            (inherit p)
            (file-name file-name))))
       user-partitions))

(define-syntax-rule (with-null-output-ports exp ...)
  "Evaluate EXP with both the output port and the error port pointing to the
bit bucket."
  (with-output-to-port (%make-void-port "w")
    (lambda ()
      (with-error-to-port (%make-void-port "w")
        (lambda () exp ...)))))

(define (create-btrfs-file-system partition)
  "Create a btrfs file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "mkfs.btrfs" "-f" partition)))

(define (create-ext4-file-system partition)
  "Create an ext4 file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "mkfs.ext4" "-F" partition)))

(define (create-fat16-file-system partition)
  "Create a fat16 file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "mkfs.fat" "-F16" partition)))

(define (create-fat32-file-system partition)
  "Create a fat32 file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "mkfs.fat" "-F32" partition)))

(define (create-jfs-file-system partition)
  "Create a JFS file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "jfs_mkfs" "-f" partition)))

(define (create-ntfs-file-system partition)
  "Create a JFS file-system for PARTITION file-name."
  (with-null-output-ports
   (invoke "mkfs.ntfs" "-F" "-f" partition)))

(define (create-swap-partition partition)
  "Set up swap area on PARTITION file-name."
  (with-null-output-ports
   (invoke "mkswap" "-f" partition)))

(define (call-with-luks-key-file password proc)
  "Write PASSWORD in a temporary file and pass it to PROC as argument."
  (call-with-temporary-output-file
   (lambda (file port)
     (put-string port password)
     (close port)
     (proc file))))

(define (user-partition-upper-file-name user-partition)
  "Return the file-name of the virtual block device corresponding to
USER-PARTITION if it is encrypted, or the plain file-name otherwise."
  (let ((crypt-label (user-partition-crypt-label user-partition))
        (file-name (user-partition-file-name user-partition)))
    (if crypt-label
        (string-append "/dev/mapper/" crypt-label)
        file-name)))

(define (luks-format-and-open user-partition)
  "Format and open the encrypted partition pointed by USER-PARTITION."
  (let* ((file-name (user-partition-file-name user-partition))
         (label (user-partition-crypt-label user-partition))
         (password (user-partition-crypt-password user-partition)))
    (call-with-luks-key-file
     password
     (lambda (key-file)
       (syslog "formatting and opening LUKS entry ~s at ~s~%"
               label file-name)
       (system* "cryptsetup" "-q" "luksFormat" file-name key-file)
       (system* "cryptsetup" "open" "--type" "luks"
                "--key-file" key-file file-name label)))))

(define (luks-close user-partition)
  "Close the encrypted partition pointed by USER-PARTITION."
  (let ((label (user-partition-crypt-label user-partition)))
    (syslog "closing LUKS entry ~s~%" label)
    (system* "cryptsetup" "close" label)))

(define (format-user-partitions user-partitions)
  "Format the <user-partition> records in USER-PARTITIONS list with
NEED-FORMATING? field set to #t."
  (for-each
   (lambda (user-partition)
     (let* ((need-formatting?
             (user-partition-need-formatting? user-partition))
            (type (user-partition-type user-partition))
            (crypt-label (user-partition-crypt-label user-partition))
            (file-name (user-partition-upper-file-name user-partition))
            (fs-type (user-partition-fs-type user-partition)))
       (when crypt-label
         (luks-format-and-open user-partition))

       (case fs-type
         ((btrfs)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-btrfs-file-system file-name)))
         ((ext4)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-ext4-file-system file-name)))
         ((fat16)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-fat16-file-system file-name)))
         ((fat32)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-fat32-file-system file-name)))
         ((jfs)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-jfs-file-system file-name)))
         ((ntfs)
          (and need-formatting?
               (not (eq? type 'extended))
               (create-ntfs-file-system file-name)))
         ((swap)
          (create-swap-partition file-name))
         (else
          ;; TODO: Add support for other file-system types.
          #t))))
   user-partitions))

(define (sort-partitions user-partitions)
  "Sort USER-PARTITIONS by mount-points, so that the more nested mount-point
comes last. This is useful to mount/umount partitions in a coherent order."
  (sort user-partitions
        (lambda (a b)
          (let ((mount-point-a (user-partition-mount-point a))
                (mount-point-b (user-partition-mount-point b)))
            (string-prefix? mount-point-a mount-point-b)))))

(define (mount-user-partitions user-partitions)
  "Mount the <user-partition> records in USER-PARTITIONS list on their
respective mount-points."
  (let* ((mount-partitions (filter user-partition-mount-point user-partitions))
         (sorted-partitions (sort-partitions mount-partitions)))
    (for-each (lambda (user-partition)
                (let* ((mount-point
                        (user-partition-mount-point user-partition))
                       (target
                        (string-append (%installer-target-dir)
                                       mount-point))
                       (fs-type
                        (user-partition-fs-type user-partition))
                       (crypt-label
                        (user-partition-crypt-label user-partition))
                       (mount-type
                        (user-fs-type->mount-type fs-type))
                       (file-name
                        (user-partition-upper-file-name user-partition)))
                  (mkdir-p target)
                  (syslog "mounting ~s on ~s~%" file-name target)
                  (mount file-name target mount-type)))
              sorted-partitions)))

(define (umount-user-partitions user-partitions)
  "Unmount all the <user-partition> records in USER-PARTITIONS list."
  (let* ((mount-partitions (filter user-partition-mount-point user-partitions))
         (sorted-partitions (sort-partitions mount-partitions)))
    (for-each (lambda (user-partition)
                (let* ((mount-point
                        (user-partition-mount-point user-partition))
                       (crypt-label
                        (user-partition-crypt-label user-partition))
                       (target
                        (string-append (%installer-target-dir)
                                       mount-point)))
                  (syslog "unmounting ~s~%" target)
                  (umount target)
                  (when crypt-label
                    (luks-close user-partition))))
              (reverse sorted-partitions))))

(define (find-swap-user-partitions user-partitions)
  "Return the subset of <user-partition> records in USER-PARTITIONS list with
the FS-TYPE field set to 'swap, return the empty list if none found."
  (filter (lambda (user-partition)
            (let ((fs-type (user-partition-fs-type user-partition)))
              (eq? fs-type 'swap)))
          user-partitions))

(define (start-swapping user-partitions)
  "Start swapping on <user-partition> records with FS-TYPE equal to 'swap."
  (let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
         (swap-devices (map user-partition-file-name swap-user-partitions)))
    (for-each swapon swap-devices)))

(define (stop-swapping user-partitions)
  "Stop swapping on <user-partition> records with FS-TYPE equal to 'swap."
  (let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
         (swap-devices (map user-partition-file-name swap-user-partitions)))
    (for-each swapoff swap-devices)))

(define-syntax-rule (with-mounted-partitions user-partitions exp ...)
  "Mount USER-PARTITIONS and start swapping within the dynamic extent of EXP."
  (dynamic-wind
    (lambda ()
      (mount-user-partitions user-partitions)
      (start-swapping user-partitions))
    (lambda ()
      exp ...)
    (lambda ()
      (umount-user-partitions user-partitions)
      (stop-swapping user-partitions)
      #f)))

(define (user-partition->file-system user-partition)
  "Convert the given USER-PARTITION record in a FILE-SYSTEM record from
(gnu system file-systems) module and return it."
  (let* ((mount-point (user-partition-mount-point user-partition))
         (fs-type (user-partition-fs-type user-partition))
         (crypt-label (user-partition-crypt-label user-partition))
         (mount-type (user-fs-type->mount-type fs-type))
         (file-name (user-partition-file-name user-partition))
         (upper-file-name (user-partition-upper-file-name user-partition))
         ;; Only compute uuid if partition is not encrypted.
         (uuid (or crypt-label
                   (uuid->string (read-partition-uuid file-name) fs-type))))
    `(file-system
       (mount-point ,mount-point)
       (device ,@(if crypt-label
                     `(,upper-file-name)
                     `((uuid ,uuid (quote ,fs-type)))))
       (type ,mount-type)
       ,@(if crypt-label
             '((dependencies mapped-devices))
             '()))))

(define (user-partitions->file-systems user-partitions)
  "Convert the given USER-PARTITIONS list of <user-partition> records into a
list of <file-system> records."
  (filter-map
   (lambda (user-partition)
     (let ((mount-point
            (user-partition-mount-point user-partition)))
       (and mount-point
            (user-partition->file-system user-partition))))
   user-partitions))

(define (user-partition->mapped-device user-partition)
  "Convert the given USER-PARTITION record into a MAPPED-DEVICE record
from (gnu system mapped-devices) and return it."
  (let ((label (user-partition-crypt-label user-partition))
        (file-name (user-partition-file-name user-partition)))
    `(mapped-device
      (source (uuid ,(uuid->string
                      (read-luks-partition-uuid file-name)
                      'luks)))
      (target ,label)
      (type luks-device-mapping))))

(define (root-user-partition? partition)
  "Return true if PARTITION is the root partition."
  (let ((mount-point (user-partition-mount-point partition)))
    (and mount-point
         (string=? mount-point "/"))))

(define (bootloader-configuration user-partitions)
  "Return the bootloader configuration field for USER-PARTITIONS."
  (let* ((root-partition (find root-user-partition?
                               user-partitions))
         (root-partition-disk (user-partition-disk-file-name root-partition)))
    `((bootloader-configuration
       ,@(if (efi-installation?)
             `((bootloader grub-efi-bootloader)
               (target ,(default-esp-mount-point)))
             `((bootloader grub-bootloader)
               (target ,root-partition-disk)))

       ;; XXX: Assume we defined the 'keyboard-layout' field of
       ;; <operating-system> right above.
       (keyboard-layout keyboard-layout)))))

(define (user-partition-missing-modules user-partitions)
  "Return the list of kernel modules missing from the default set of kernel
modules to access USER-PARTITIONS."
  (let ((devices (filter user-partition-crypt-label user-partitions))
        (root    (find root-user-partition? user-partitions)))
    (delete-duplicates
     (append-map (lambda (device)
                   (catch 'system-error
                     (lambda ()
                       (missing-modules device %base-initrd-modules))
                     (const '())))
                 (delete-duplicates
                  (map user-partition-file-name
                       (cons root devices)))))))

(define (initrd-configuration user-partitions)
  "Return an 'initrd-modules' field with everything needed for
USER-PARTITIONS, or return nothing."
  (match (user-partition-missing-modules user-partitions)
    (()
     '())
    ((modules ...)
     `((initrd-modules (append ',modules
                               %base-initrd-modules))))))

(define (user-partitions->configuration user-partitions)
  "Return the configuration field for USER-PARTITIONS."
  (let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
         (swap-devices (map user-partition-file-name swap-user-partitions))
         (encrypted-partitions
          (filter user-partition-crypt-label user-partitions)))
    `((bootloader ,@(bootloader-configuration user-partitions))
      ,@(initrd-configuration user-partitions)
      ,@(if (null? swap-devices)
            '()
            `((swap-devices (list ,@swap-devices))))
      ,@(if (null? encrypted-partitions)
            '()
            `((mapped-devices
               (list ,@(map user-partition->mapped-device
                            encrypted-partitions)))))
      (file-systems (cons*
                     ,@(user-partitions->file-systems user-partitions)
                     %base-file-systems)))))

\f
;;
;; Initialization.
;;

(define (init-parted)
  "Initialize libparted support."
  (probe-all-devices!)
  ;; Remove all logical devices, otherwise "device-is-busy?" will report true
  ;; on all devices containaing active logical volumes.
  (remove-logical-devices)
  (exception-set-handler (lambda (exception)
                           EXCEPTION-OPTION-UNHANDLED)))

(define (free-parted devices)
  "Deallocate memory used for DEVICES in parted, force sync them and wait for
the devices not to be used before returning."
  ;; XXX: Formatting and further operations on disk partition table may fail
  ;; because the partition table changes are not synced, or because the device
  ;; is still in use, even if parted should have finished editing
  ;; partitions. This is not well understood, but syncing devices and waiting
  ;; them to stop returning EBUSY to BLKRRPART ioctl seems to be enough. The
  ;; same kind of issue is described here:
  ;; https://mail.gnome.org/archives/commits-list/2013-March/msg18423.html.
  (let ((device-file-names (map device-path devices)))
    (for-each force-device-sync devices)
    (for-each (lambda (file-name)
                (let ((in-use? (with-delay-device-in-use? file-name)))
                  (and in-use?
                       (error
                        (format #f (G_ "Device ~a is still in use.")
                                file-name)))))
              device-file-names)))

debug log:

solving fffd5abf3b ...
found fffd5abf3b in https://git.savannah.gnu.org/cgit/guix.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).