usr.sbin/installer/dfuibe_installer/fn_subpart_hammer.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  *
  11  *   Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in
  13  *   the documentation and/or other materials provided with the
  14  *   distribution.
  15  *
  16  *   Neither the name of the DragonFly Project nor the names of its
  17  *   contributors may be used to endorse or promote products derived
  18  *   from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  27  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  29  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  31  * OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * fn_subpart_hammer.c
  36  * Installer Function : Create HAMMER Subpartitions.
  37  */
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #ifdef ENABLE_NLS
  44 #include <libintl.h>
  45 #define _(String) gettext (String)
  46 #else
  47 #define _(String) (String)
  48 #endif
  49
  50 #include "libaura/mem.h"
  51 #include "libaura/buffer.h"
  52 #include "libaura/dict.h"
  53 #include "libaura/fspred.h"
  54
  55 #include "libdfui/dfui.h"
  56 #include "libdfui/dump.h"
  57 #include "libdfui/system.h"
  58
  59 #include "libinstaller/commands.h"
  60 #include "libinstaller/diskutil.h"
  61 #include "libinstaller/functions.h"
  62 #include "libinstaller/uiutil.h"
  63
  64 #include "fn.h"
  65 #include "flow.h"
  66 #include "pathnames.h"
  67
  68 static int      create_subpartitions(struct i_fn_args *);
  69 static long     default_capacity(struct storage *, const char *);
  70 static int      check_capacity(struct i_fn_args *);
  71 static int      check_subpartition_selections(struct dfui_response *, struct i_fn_args *);
  72 static void     save_subpartition_selections(struct dfui_response *, struct i_fn_args *);
  73 static void     populate_create_subpartitions_form(struct dfui_form *, struct i_fn_args *);
  74 static int      warn_subpartition_selections(struct i_fn_args *);
  75 static int      warn_encrypted_boot(struct i_fn_args *);
  76 static struct dfui_form *make_create_subpartitions_form(struct i_fn_args *);
  77 static int      show_create_subpartitions_form(struct dfui_form *, struct i_fn_args *);
  78
  79 static const char *def_mountpt[]  = {"/boot", "swap", "/", NULL};
  80 static int expert = 0;
  81
  82 /*
  83  * Given a set of subpartitions-to-be in the selected slice,
  84  * create them.
  85  */
  86 static int
  87 create_subpartitions(struct i_fn_args *a)
  88 {
  89         struct subpartition *sp;
  90         struct commands *cmds;
  91         int result = 0;
  92         int num_partitions;
  93
  94         cmds = commands_new();
  95         if (!is_file("%sinstall.disklabel.%s",
  96             a->tmp,
  97             slice_get_device_name(storage_get_selected_slice(a->s)))) {
  98                 /*
  99                  * Get a copy of the 'virgin' disklabel.
 100                  * XXX It might make more sense for this to
 101                  * happen right after format_slice() instead.
 102                  */
 103                 command_add(cmds, "%s%s -r %s >%sinstall.disklabel.%s",
 104                     a->os_root, cmd_name(a, "DISKLABEL64"),
 105                     slice_get_device_name(storage_get_selected_slice(a->s)),
 106                     a->tmp,
 107                     slice_get_device_name(storage_get_selected_slice(a->s)));
 108         }
 109
 110         /*
 111          * Weave together a new disklabel out the of the 'virgin'
 112          * disklabel, and the user's subpartition choices.
 113          */
 114
 115         /*
 116          * Take everything from the 'virgin' disklabel up until the
 117          * '16 partitions' line.
 118          */
 119         num_partitions = 16;
 120         command_add(cmds, "%s%s '$2==\"partitions:\" || cut { cut = 1 } !cut { print $0 }' <%sinstall.disklabel.%s >%sinstall.disklabel",
 121             a->os_root, cmd_name(a, "AWK"),
 122             a->tmp,
 123             slice_get_device_name(storage_get_selected_slice(a->s)),
 124             a->tmp);
 125
 126         /*
 127          * 16 partitions:
 128          * #          size     offset    fstype
 129          *   c:   16383969          0    unused #    7999.985MB
 130          */
 131
 132         command_add(cmds, "%s%s '%d partitions:' >>%sinstall.disklabel",
 133             a->os_root, cmd_name(a, "ECHO"), num_partitions ,a->tmp);
 134         command_add(cmds, "%s%s '%s' >>%sinstall.disklabel",
 135             a->os_root, cmd_name(a, "ECHO"),
 136             "#          size     offset    fstype",
 137             a->tmp);
 138
 139 #ifdef DEBUG
 140         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 141              sp != NULL; sp = subpartition_next(sp)) {
 142                 command_add(cmds, "%s%s 'mountpoint: %s device: %s'",
 143                      a->os_root, cmd_name(a, "ECHO"),
 144                      subpartition_get_mountpoint(sp),
 145                      subpartition_get_device_name(sp));
 146         }
 147 #endif
 148
 149         /*
 150          * Write a line for each subpartition the user wants.
 151          */
 152         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 153              sp != NULL; sp = subpartition_next(sp)) {
 154                 if (subpartition_is_tmpfsbacked(sp)) {
 155                         continue;
 156                 }
 157                 if (subpartition_is_swap(sp)) {
 158                         command_add(cmds, "%s%s '  %c:\t%s\t*\tswap' >>%sinstall.disklabel",
 159                             a->os_root, cmd_name(a, "ECHO"),
 160                             subpartition_get_letter(sp),
 161                             capacity_to_string(subpartition_get_capacity(sp)),
 162                             a->tmp);
 163                 } else if (strcmp(subpartition_get_mountpoint(sp), "/boot") == 0) {
 164                         command_add(cmds, "%s%s '  %c:\t%s\t0\t4.2BSD' >>%sinstall.disklabel",
 165                             a->os_root, cmd_name(a, "ECHO"),
 166                             subpartition_get_letter(sp),
 167                             capacity_to_string(subpartition_get_capacity(sp)),
 168                             a->tmp);
 169                 } else {
 170                         command_add(cmds, "%s%s '  %c:\t%s\t*\tHAMMER' >>%sinstall.disklabel",
 171                             a->os_root, cmd_name(a, "ECHO"),
 172                             subpartition_get_letter(sp),
 173                             capacity_to_string(subpartition_get_capacity(sp)),
 174                             a->tmp);
 175                 }
 176         }
 177         temp_file_add(a, "install.disklabel");
 178
 179         /*
 180          * Label the slice from the disklabel we just wove together.
 181          */
 182         command_add(cmds, "%s%s -R -B -r %s %sinstall.disklabel",
 183             a->os_root, cmd_name(a, "DISKLABEL64"),
 184             slice_get_device_name(storage_get_selected_slice(a->s)),
 185             a->tmp);
 186
 187         /*
 188          * Create a snapshot of the disklabel we just created
 189          * for debugging inspection in the log.
 190          */
 191         command_add(cmds, "%s%s %s",
 192             a->os_root, cmd_name(a, "DISKLABEL64"),
 193             slice_get_device_name(storage_get_selected_slice(a->s)));
 194
 195         /*
 196          * If encryption was specified, load dm(4).
 197          */
 198         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 199              sp != NULL; sp = subpartition_next(sp)) {
 200                 if (subpartition_is_encrypted(sp)) {
 201                         fn_get_passphrase(a);
 202                         break;
 203                 }
 204         }
 205
 206         /*
 207          * Create filesystems on the newly-created subpartitions.
 208          */
 209         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 210              sp != NULL; sp = subpartition_next(sp)) {
 211                 if (subpartition_is_swap(sp) || subpartition_is_tmpfsbacked(sp)) {
 212                         if (subpartition_is_swap(sp) &&
 213                             subpartition_is_encrypted(sp)) {
 214                                 command_add(cmds,
 215                                     "%s%s -d /tmp/t1 luksFormat %sdev/%s",
 216                                     a->os_root, cmd_name(a, "CRYPTSETUP"),
 217                                     a->os_root,
 218                                     subpartition_get_device_name(sp));
 219                                 command_add(cmds,
 220                                     "%s%s -d /tmp/t1 luksOpen %sdev/%s swap",
 221                                     a->os_root, cmd_name(a, "CRYPTSETUP"),
 222                                     a->os_root,
 223                                     subpartition_get_device_name(sp));
 224                         }
 225                         continue;
 226                 }
 227
 228                 if (strcmp(subpartition_get_mountpoint(sp), "/boot") == 0) {
 229                         command_add(cmds, "%s%s %sdev/%s",
 230                             a->os_root, cmd_name(a, "NEWFS"),
 231                             a->os_root,
 232                             subpartition_get_device_name(sp));
 233                 } else {
 234                         if (subpartition_is_encrypted(sp)) {
 235                                 command_add(cmds,
 236                                     "%s%s -d /tmp/t1 luksFormat %sdev/%s",
 237                                     a->os_root, cmd_name(a, "CRYPTSETUP"),
 238                                     a->os_root,
 239                                     subpartition_get_device_name(sp));
 240                                 command_add(cmds,
 241                                     "%s%s -d /tmp/t1 luksOpen %sdev/%s root",
 242                                     a->os_root, cmd_name(a, "CRYPTSETUP"),
 243                                     a->os_root,
 244                                     subpartition_get_device_name(sp));
 245                         }
 246                         command_add(cmds, "%s%s -f -L ROOT %sdev/%s",
 247                             a->os_root, cmd_name(a, "NEWFS_HAMMER"),
 248                             a->os_root,
 249                             subpartition_is_encrypted(sp) ?
 250                             "mapper/root" : subpartition_get_device_name(sp));
 251                 }
 252         }
 253
 254         result = commands_execute(a, cmds);
 255         commands_free(cmds);
 256         return(result);
 257 }
 258
 259 static long
 260 default_capacity(struct storage *s, const char *mtpt)
 261 {
 262         unsigned long boot, root, swap;
 263         unsigned long capacity;
 264         unsigned long mem;
 265
 266         capacity = slice_get_capacity(storage_get_selected_slice(s));
 267         mem = storage_get_memsize(s);
 268
 269         /*
 270          * Try to get 768M for /boot, but if space is tight go down to 128M
 271          * in 128M steps.
 272          * For swap, start with 2*mem but take less if space is tight
 273          * (minimum is 384).
 274          * Rest goes to / (which is at least 75% slice size).
 275          */
 276
 277         root = capacity / 4 * 3;
 278         swap = 2 * mem;
 279         if (swap > SWAP_MAX)
 280                 swap = SWAP_MAX;
 281         boot = 768;
 282         while (boot + root > capacity - 384)
 283                 boot -= 128;
 284         if (boot + root + swap > capacity)
 285                 swap = capacity - boot - root;
 286
 287         if (capacity < DISK_MIN)
 288                 return(-1);
 289         else if (strcmp(mtpt, "/boot") == 0)
 290                 return(boot);
 291         else if (strcmp(mtpt, "swap") == 0)
 292                 return(swap);
 293         else if (strcmp(mtpt, "/") == 0)
 294                 return(-1);
 295
 296         /* shouldn't ever happen */
 297         return(-1);
 298 }
 299
 300 static int
 301 check_capacity(struct i_fn_args *a)
 302 {
 303         struct subpartition *sp;
 304         long min_capacity[] = {128, 0, DISK_MIN - 128, 0};
 305         unsigned long total_capacity = 0;
 306         unsigned long remaining_capacity;
 307         int mtpt, warn_smallpart = 0;
 308
 309         remaining_capacity = slice_get_capacity(storage_get_selected_slice(a->s));
 310         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 311              sp != NULL; sp = subpartition_next(sp)) {
 312                 if (subpartition_get_capacity(sp) != -1)
 313                         remaining_capacity -= subpartition_get_capacity(sp);
 314         }
 315
 316         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 317              sp != NULL; sp = subpartition_next(sp)) {
 318                 long subpart_capacity = subpartition_get_capacity(sp);
 319                 const char *mountpt = subpartition_get_mountpoint(sp);
 320
 321                 if (subpart_capacity == -1)
 322                         total_capacity++;
 323                 else
 324                         total_capacity += subpart_capacity;
 325                 for (mtpt = 0; def_mountpt[mtpt] != NULL; mtpt++) {
 326                         if (strcmp(mountpt, def_mountpt[mtpt]) == 0 &&
 327                             subpart_capacity < min_capacity[mtpt] &&
 328                             subpart_capacity != -1) {
 329                                 inform(a->c, _("WARNING: The size (%ldM) specified for "
 330                                     "the %s subpartition is too small. It "
 331                                     "should be at least %ldM or you will "
 332                                     "risk running out of space during "
 333                                     "the installation."),
 334                                     subpart_capacity, mountpt,
 335                                     min_capacity[mtpt]);
 336                         }
 337                 }
 338                 if (strcmp(mountpt, "/boot") != 0 &&
 339                     strcmp(mountpt, "swap") != 0) {
 340                         if ((subpart_capacity == -1 && remaining_capacity < HAMMER_MIN) ||
 341                             (subpart_capacity != -1 && subpart_capacity < HAMMER_MIN))
 342                                 warn_smallpart++;
 343                 }
 344         }
 345
 346         if (total_capacity > slice_get_capacity(storage_get_selected_slice(a->s))) {
 347                 inform(a->c, _("The space allocated to all of your selected "
 348                     "subpartitions (%luM) exceeds the total "
 349                     "capacity of the selected primary partition "
 350                     "(%luM). Remove some subpartitions or choose "
 351                     "a smaller size for them and try again."),
 352                     total_capacity, slice_get_capacity(storage_get_selected_slice(a->s)));
 353                 return(0);
 354         }
 355
 356         if (warn_smallpart)
 357                 return (confirm_dangerous_action(a->c,
 358                     _("WARNING: HAMMER filesystems less than 50GB are "
 359                     "not recommended!\n"
 360                     "You may have to run 'hammer prune-everything' and "
 361                     "'hammer reblock'\n"
 362                     "quite often, even if using a nohistory mount.\n\n"
 363                     "NOTE: HAMMER filesystems smaller than 10GB are "
 364                     "unsupported. Use at your own risk.")));
 365
 366         return(1);
 367 }
 368
 369 static int
 370 check_subpartition_selections(struct dfui_response *r, struct i_fn_args *a)
 371 {
 372         struct dfui_dataset *ds;
 373         struct dfui_dataset *star_ds = NULL;
 374         struct aura_dict *d;
 375         const char *mountpoint, *capstring;
 376         long capacity = 0;
 377         int found_root = 0;
 378         int valid = 1;
 379
 380         d = aura_dict_new(1, AURA_DICT_LIST);
 381
 382         if ((ds = dfui_response_dataset_get_first(r)) == NULL) {
 383                 inform(a->c, _("Please set up at least one subpartition."));
 384                 valid = 0;
 385         }
 386
 387         for (ds = dfui_response_dataset_get_first(r); valid && ds != NULL;
 388             ds = dfui_dataset_get_next(ds)) {
 389 #ifdef DEBUG
 390                 dfui_dataset_dump(ds);
 391 #endif
 392                 mountpoint = dfui_dataset_get_value(ds, "mountpoint");
 393                 capstring = dfui_dataset_get_value(ds, "capacity");
 394
 395                 if (aura_dict_exists(d, mountpoint, strlen(mountpoint) + 1)) {
 396                         inform(a->c, _("The same mount point cannot be specified "
 397                             "for two different subpartitions."));
 398                         valid = 0;
 399                 }
 400
 401                 if (strcmp(mountpoint, "/") == 0)
 402                         found_root = 1;
 403
 404                 if (strcmp(capstring, "*") == 0) {
 405                         if (star_ds != NULL) {
 406                                 inform(a->c, _("You cannot have more than one subpartition "
 407                                     "with a '*' capacity (meaning 'use the remainder "
 408                                     "of the primary partition'.)"));
 409                                 valid = 0;
 410                         } else {
 411                                 star_ds = ds;
 412                         }
 413                 }
 414
 415                 if (!(!strcasecmp(mountpoint, "swap") || mountpoint[0] == '/')) {
 416                         inform(a->c, _("Mount point must be either 'swap', or it must "
 417                             "start with a '/'."));
 418                         valid = 0;
 419                 }
 420
 421                 if (strpbrk(mountpoint, " \\\"'`") != NULL) {
 422                         inform(a->c, _("Mount point may not contain the following "
 423                             "characters: blank space, backslash, or "
 424                             "single, double, or back quotes."));
 425                         valid = 0;
 426                 }
 427
 428                 if (strlen(capstring) == 0) {
 429                         inform(a->c, _("A capacity must be specified."));
 430                         valid = 0;
 431                 }
 432
 433                 if (!string_to_capacity(capstring, &capacity)) {
 434                         inform(a->c, _("Capacity must be either a '*' symbol to indicate "
 435                             "'use the rest of the primary partition', or it "
 436                             "must be a series of decimal digits ending with a "
 437                             "'M' (indicating megabytes) or a 'G' (indicating "
 438                             "gigabytes.)"));
 439                         valid = 0;
 440                 }
 441
 442                 /*
 443                  * Maybe remove this limit entirely?
 444                  */
 445                 if ((strcasecmp(mountpoint, "swap") == 0) &&
 446                     (capacity > SWAP_MAX)) {
 447                         inform(a->c, _("Swap capacity is limited to %dG."),
 448                             SWAP_MAX / 1024);
 449                         valid = 0;
 450                 }
 451
 452                 /*
 453                  * If we made it through that obstacle course, all is well.
 454                  */
 455
 456                 if (valid)
 457                         aura_dict_store(d, mountpoint, strlen(mountpoint) + 1, "", 1);
 458         }
 459
 460         if (!found_root) {
 461                 inform(a->c, _("You must include a / (root) subpartition."));
 462                 valid = 0;
 463         }
 464
 465         if (aura_dict_size(d) > 16) {
 466                 inform(a->c, _("You cannot have more than 16 subpartitions "
 467                     "on a single primary partition.  Remove some "
 468                     "and try again."));
 469                 valid = 0;
 470         }
 471
 472         aura_dict_free(d);
 473
 474         return(valid);
 475 }
 476
 477 static void
 478 save_subpartition_selections(struct dfui_response *r, struct i_fn_args *a)
 479 {
 480         struct dfui_dataset *ds;
 481         const char *mountpoint, *capstring;
 482         long capacity;
 483         int valid = 1;
 484
 485         subpartitions_free(storage_get_selected_slice(a->s));
 486
 487         for (ds = dfui_response_dataset_get_first(r); valid && ds != NULL;
 488             ds = dfui_dataset_get_next(ds)) {
 489                 mountpoint = dfui_dataset_get_value(ds, "mountpoint");
 490                 capstring = dfui_dataset_get_value(ds, "capacity");
 491
 492                 if (string_to_capacity(capstring, &capacity)) {
 493                         subpartition_new_hammer(storage_get_selected_slice(a->s),
 494                             mountpoint, capacity,
 495                             strcasecmp(dfui_dataset_get_value(ds, "encrypted"), "Y") == 0);
 496                 }
 497         }
 498 }
 499
 500 static void
 501 populate_create_subpartitions_form(struct dfui_form *f, struct i_fn_args *a)
 502 {
 503         struct subpartition *sp;
 504         struct dfui_dataset *ds;
 505         int i;
 506         long capacity;
 507
 508         if (slice_subpartition_first(storage_get_selected_slice(a->s)) != NULL) {
 509                 /*
 510                  * The user has already given us their subpartition
 511                  * preferences, so use them here.
 512                  */
 513                 for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 514                      sp != NULL; sp = subpartition_next(sp)) {
 515                         ds = dfui_dataset_new();
 516                         dfui_dataset_celldata_add(ds, "mountpoint",
 517                             subpartition_get_mountpoint(sp));
 518                         dfui_dataset_celldata_add(ds, "capacity",
 519                             capacity_to_string(subpartition_get_capacity(sp)));
 520                         dfui_dataset_celldata_add(ds, "encrypted",
 521                             subpartition_is_encrypted(sp) ? "Y" : "N");
 522                         dfui_form_dataset_add(f, ds);
 523                 }
 524         } else {
 525                 /*
 526                  * Otherwise, populate the form with datasets representing
 527                  * reasonably-calculated defaults.  The defaults are chosen
 528                  * based on the slice's total capacity and the machine's
 529                  * total physical memory (for swap.)
 530                  */
 531                 for (i = 0; def_mountpt[i] != NULL; i++) {
 532                         capacity = default_capacity(a->s, def_mountpt[i]);
 533                         ds = dfui_dataset_new();
 534                         dfui_dataset_celldata_add(ds, "mountpoint",
 535                             def_mountpt[i]);
 536                         dfui_dataset_celldata_add(ds, "capacity",
 537                             capacity_to_string(capacity));
 538                         dfui_dataset_celldata_add(ds, "encrypted", "N");
 539                         dfui_form_dataset_add(f, ds);
 540                 }
 541         }
 542 }
 543
 544 static int
 545 warn_subpartition_selections(struct i_fn_args *a)
 546 {
 547         int valid = 0;
 548
 549         if (subpartition_find(storage_get_selected_slice(a->s), "/boot") == NULL) {
 550                 inform(a->c, _("The /boot partition must not be omitted."));
 551         } else if (subpartition_find(storage_get_selected_slice(a->s), "/home") != NULL ||
 552             subpartition_find(storage_get_selected_slice(a->s), "/tmp") != NULL ||
 553             subpartition_find(storage_get_selected_slice(a->s), "/usr") != NULL ||
 554             subpartition_find(storage_get_selected_slice(a->s), "/usr/obj") != NULL ||
 555             subpartition_find(storage_get_selected_slice(a->s), "/var") != NULL ||
 556             subpartition_find(storage_get_selected_slice(a->s), "/var/crash") != NULL ||
 557             subpartition_find(storage_get_selected_slice(a->s), "/var/tmp") != NULL) {
 558                 inform(a->c, _("Pseudo filesystems will automatically be created "
 559                         "for /home, /tmp, /usr, /usr/obj, /var, /var/crash "
 560                         "and /var/tmp and must not be specified."));
 561         } else {
 562                 valid = check_capacity(a);
 563         }
 564
 565         return(!valid);
 566 }
 567
 568 static int
 569 warn_encrypted_boot(struct i_fn_args *a)
 570 {
 571         int valid = 1;
 572
 573         struct subpartition *sp;
 574
 575         sp = subpartition_find(storage_get_selected_slice(a->s), "/boot");
 576         if (sp == NULL)
 577                 return(!valid);
 578
 579         if (subpartition_is_encrypted(sp)) {
 580                 switch (dfui_be_present_dialog(a->c, _("/boot cannot be encrypted"),
 581                     _("Leave /boot unencrypted|Return to Create Subpartitions"),
 582                     _("You have selected encryption for the /boot partition which "
 583                     "is not supported."))) {
 584                 case 1:
 585                         subpartition_clr_encrypted(sp);
 586                         valid = 1;
 587                         break;
 588                 case 2:
 589                         valid = 0;
 590                         break;
 591                 default:
 592                         abort_backend();
 593                 }
 594         }
 595
 596         return(!valid);
 597 }
 598
 599 static struct dfui_form *
 600 make_create_subpartitions_form(struct i_fn_args *a)
 601 {
 602         struct dfui_form *f;
 603         char msg_buf[1][1024];
 604
 605         snprintf(msg_buf[0], sizeof(msg_buf[0]),
 606             _("Subpartitions further divide a primary partition for "
 607             "use with %s.  Some reasons you may want "
 608             "a set of subpartitions are:\n\n"
 609             "- you want to restrict how much data can be written "
 610             "to certain parts of the primary partition, to quell "
 611             "denial-of-service attacks; and\n"
 612             "- you want to speed up access to data on the disk."
 613             ""), OPERATING_SYSTEM_NAME);
 614
 615         f = dfui_form_create(
 616             "create_subpartitions",
 617             _("Create Subpartitions"),
 618             _("Set up the subpartitions (also known as just `partitions' "
 619             "in BSD tradition) you want to have on this primary "
 620             "partition. In most cases you should be fine with "
 621             "the default settings.\n\n"
 622             "For Capacity, use 'M' to indicate megabytes, 'G' to "
 623             "indicate gigabytes, or a single '*' to indicate "
 624             "'use the remaining space on the primary partition'."),
 625
 626             msg_buf[0],
 627
 628             "p", "special", "dfinstaller_create_subpartitions",
 629             "p", "minimum_width","64",
 630
 631             "f", "mountpoint", _("Mountpoint"), "", "",
 632             "f", "capacity", _("Capacity"), "", "",
 633
 634             "f", "encrypted", _("Encrypted"), "", "",
 635             "p", "control", "checkbox",
 636
 637             "a", "ok", _("Accept and Create"), "", "",
 638             "a", "cancel",
 639             (disk_get_formatted(storage_get_selected_disk(a->s)) ?
 640             _("Return to Select Disk") :
 641             _("Return to Select Primary Partition")), "", "",
 642             "p", "accelerator", "ESC",
 643
 644             NULL
 645         );
 646
 647         dfui_form_set_multiple(f, 1);
 648         dfui_form_set_extensible(f, 1);
 649         /*
 650          * Remove ATM until HAMMER installer support is better
 651          * dfui_form_set_extensible(f, 1);
 652          */
 653 #if 0
 654         if (expert) {
 655                 fi = dfui_form_field_add(f, "softupdates",
 656                     dfui_info_new(_("Softupdates"), "", ""));
 657                 dfui_field_property_set(fi, "control", "checkbox");
 658
 659                 fi = dfui_form_field_add(f, "tmpfsbacked",
 660                     dfui_info_new(_("TMPFS"), "", ""));
 661                 dfui_field_property_set(fi, "control", "checkbox");
 662
 663                 fi = dfui_form_field_add(f, "fsize",
 664                     dfui_info_new(_("Frag Sz"), "", ""));
 665
 666                 fi = dfui_form_field_add(f, "bsize",
 667                     dfui_info_new(_("Block Sz"), "", ""));
 668
 669                 dfui_form_action_add(f, "switch",
 670                     dfui_info_new(_("Switch to Normal Mode"), "", ""));
 671         } else {
 672                 dfui_form_action_add(f, "switch",
 673                     dfui_info_new(_("Switch to Expert Mode"), "", ""));
 674         }
 675 #endif
 676         return(f);
 677 }
 678
 679 /*
 680  * Returns:
 681  *      -1 = the form should be redisplayed
 682  *       0 = failure, function is over
 683  *       1 = success, function is over
 684  */
 685 static int
 686 show_create_subpartitions_form(struct dfui_form *f, struct i_fn_args *a)
 687 {
 688         struct dfui_dataset *ds;
 689         struct dfui_response *r;
 690
 691         for (;;) {
 692                 if (dfui_form_dataset_get_first(f) == NULL)
 693                         populate_create_subpartitions_form(f, a);
 694
 695                 if (!dfui_be_present(a->c, f, &r))
 696                         abort_backend();
 697
 698                 if (strcmp(dfui_response_get_action_id(r), "cancel") == 0) {
 699                         dfui_response_free(r);
 700                         return(0);
 701                 } else if (strcmp(dfui_response_get_action_id(r), "switch") == 0) {
 702                         if (check_subpartition_selections(r, a)) {
 703                                 save_subpartition_selections(r, a);
 704                                 expert = expert ? 0 : 1;
 705                                 dfui_response_free(r);
 706                                 return(-1);
 707                         }
 708                 } else {
 709                         if (check_subpartition_selections(r, a)) {
 710                                 save_subpartition_selections(r, a);
 711                                 if (!warn_subpartition_selections(a) &&
 712                                     !warn_encrypted_boot(a)) {
 713                                         if (!create_subpartitions(a)) {
 714                                                 inform(a->c, _("The subpartitions you chose were "
 715                                                         "not correctly created, and the "
 716                                                         "primary partition may "
 717                                                         "now be in an inconsistent state. "
 718                                                         "We recommend re-formatting it "
 719                                                         "before proceeding."));
 720                                                 dfui_response_free(r);
 721                                                 return(0);
 722                                         } else {
 723                                                 dfui_response_free(r);
 724                                                 return(1);
 725                                         }
 726                                 }
 727                         }
 728                 }
 729
 730                 dfui_form_datasets_free(f);
 731                 /* dfui_form_datasets_add_from_response(f, r); */
 732                 for (ds = dfui_response_dataset_get_first(r); ds != NULL;
 733                     ds = dfui_dataset_get_next(ds)) {
 734                         dfui_form_dataset_add(f, dfui_dataset_dup(ds));
 735                 }
 736         }
 737 }
 738
 739 /*
 740  * fn_create_subpartitions_hammer: let the user specify what subpartitions they
 741  * want on the disk, how large each should be, and where it should be mounted.
 742  */
 743 void
 744 fn_create_subpartitions_hammer(struct i_fn_args *a)
 745 {
 746         struct dfui_form *f;
 747         int done = 0;
 748
 749         a->result = 0;
 750         while (!done) {
 751                 f = make_create_subpartitions_form(a);
 752                 switch (show_create_subpartitions_form(f, a)) {
 753                 case -1:
 754                         done = 0;
 755                         break;
 756                 case 0:
 757                         done = 1;
 758                         a->result = 0;
 759                         break;
 760                 case 1:
 761                         done = 1;
 762                         a->result = 1;
 763                         break;
 764                 }
 765                 dfui_form_free(f);
 766         }
 767 }