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 struct dfui_form *make_create_subpartitions_form(struct i_fn_args *);
  76 static int      show_create_subpartitions_form(struct dfui_form *, struct i_fn_args *);
  77
  78 static const char *def_mountpt[]  = {"/boot", "swap", "/", NULL};
  79 static int expert = 0;
  80
  81 /*
  82  * Given a set of subpartitions-to-be in the selected slice,
  83  * create them.
  84  */
  85 static int
  86 create_subpartitions(struct i_fn_args *a)
  87 {
  88         struct subpartition *sp;
  89         struct commands *cmds;
  90         int result = 0;
  91         int num_partitions;
  92
  93         cmds = commands_new();
  94         if (!is_file("%sinstall.disklabel.%s",
  95             a->tmp,
  96             slice_get_device_name(storage_get_selected_slice(a->s)))) {
  97                 /*
  98                  * Get a copy of the 'virgin' disklabel.
  99                  * XXX It might make more sense for this to
 100                  * happen right after format_slice() instead.
 101                  */
 102                 command_add(cmds, "%s%s -r %s >%sinstall.disklabel.%s",
 103                     a->os_root, cmd_name(a, "DISKLABEL64"),
 104                     slice_get_device_name(storage_get_selected_slice(a->s)),
 105                     a->tmp,
 106                     slice_get_device_name(storage_get_selected_slice(a->s)));
 107         }
 108
 109         /*
 110          * Weave together a new disklabel out the of the 'virgin'
 111          * disklabel, and the user's subpartition choices.
 112          */
 113
 114         /*
 115          * Take everything from the 'virgin' disklabel up until the
 116          * '16 partitions' line.
 117          */
 118         num_partitions = 16;
 119         command_add(cmds, "%s%s '$2==\"partitions:\" || cut { cut = 1 } !cut { print $0 }' <%sinstall.disklabel.%s >%sinstall.disklabel",
 120             a->os_root, cmd_name(a, "AWK"),
 121             a->tmp,
 122             slice_get_device_name(storage_get_selected_slice(a->s)),
 123             a->tmp);
 124
 125         /*
 126          * 16 partitions:
 127          * #          size     offset    fstype
 128          *   c:   16383969          0    unused #    7999.985MB
 129          */
 130
 131         command_add(cmds, "%s%s '%d partitions:' >>%sinstall.disklabel",
 132             a->os_root, cmd_name(a, "ECHO"), num_partitions ,a->tmp);
 133         command_add(cmds, "%s%s '%s' >>%sinstall.disklabel",
 134             a->os_root, cmd_name(a, "ECHO"),
 135             "#          size     offset    fstype",
 136             a->tmp);
 137
 138 #ifdef DEBUG
 139         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 140              sp != NULL; sp = subpartition_next(sp)) {
 141                 command_add(cmds, "%s%s 'mountpoint: %s device: %s'",
 142                      a->os_root, cmd_name(a, "ECHO"),
 143                      subpartition_get_mountpoint(sp),
 144                      subpartition_get_device_name(sp));
 145         }
 146 #endif
 147
 148         /*
 149          * Write a line for each subpartition the user wants.
 150          */
 151         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 152              sp != NULL; sp = subpartition_next(sp)) {
 153                 if (subpartition_is_mfsbacked(sp)) {
 154                         continue;
 155                 }
 156                 if (subpartition_is_swap(sp)) {
 157                         command_add(cmds, "%s%s '  %c:\t%s\t*\tswap' >>%sinstall.disklabel",
 158                             a->os_root, cmd_name(a, "ECHO"),
 159                             subpartition_get_letter(sp),
 160                             capacity_to_string(subpartition_get_capacity(sp)),
 161                             a->tmp);
 162                 } else if (strcmp(subpartition_get_mountpoint(sp), "/boot") == 0) {
 163                         command_add(cmds, "%s%s '  %c:\t%s\t0\t4.2BSD' >>%sinstall.disklabel",
 164                             a->os_root, cmd_name(a, "ECHO"),
 165                             subpartition_get_letter(sp),
 166                             capacity_to_string(subpartition_get_capacity(sp)),
 167                             a->tmp);
 168                 } else {
 169                         command_add(cmds, "%s%s '  %c:\t%s\t*\tHAMMER' >>%sinstall.disklabel",
 170                             a->os_root, cmd_name(a, "ECHO"),
 171                             subpartition_get_letter(sp),
 172                             capacity_to_string(subpartition_get_capacity(sp)),
 173                             a->tmp);
 174                 }
 175         }
 176         temp_file_add(a, "install.disklabel");
 177
 178         /*
 179          * Label the slice from the disklabel we just wove together.
 180          */
 181         command_add(cmds, "%s%s -R -B -r %s %sinstall.disklabel",
 182             a->os_root, cmd_name(a, "DISKLABEL64"),
 183             slice_get_device_name(storage_get_selected_slice(a->s)),
 184             a->tmp);
 185
 186         /*
 187          * Create a snapshot of the disklabel we just created
 188          * for debugging inspection in the log.
 189          */
 190         command_add(cmds, "%s%s %s",
 191             a->os_root, cmd_name(a, "DISKLABEL64"),
 192             slice_get_device_name(storage_get_selected_slice(a->s)));
 193
 194         /*
 195          * Create filesystems on the newly-created subpartitions.
 196          */
 197         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 198              sp != NULL; sp = subpartition_next(sp)) {
 199                 if (subpartition_is_swap(sp) || subpartition_is_mfsbacked(sp))
 200                         continue;
 201
 202                 /*
 203                  * Ensure that all the needed device nodes exist.
 204                  */
 205                 command_add_ensure_dev(a, cmds,
 206                     disk_get_device_name(storage_get_selected_disk(a->s)));
 207                 command_add_ensure_dev(a, cmds,
 208                     slice_get_device_name(storage_get_selected_slice(a->s)));
 209                 command_add_ensure_dev(a, cmds,
 210                     subpartition_get_device_name(sp));
 211
 212                 if (strcmp(subpartition_get_mountpoint(sp), "/boot") == 0) {
 213                         command_add(cmds, "%s%s %sdev/%s",
 214                             a->os_root, cmd_name(a, "NEWFS"),
 215                             a->os_root,
 216                             subpartition_get_device_name(sp));
 217                 } else {
 218                         command_add(cmds, "%s%s -f -L ROOT %sdev/%s",
 219                             a->os_root, cmd_name(a, "NEWFS_HAMMER"),
 220                             a->os_root,
 221                             subpartition_get_device_name(sp));
 222                 }
 223         }
 224
 225         result = commands_execute(a, cmds);
 226         commands_free(cmds);
 227         return(result);
 228 }
 229
 230 static long
 231 default_capacity(struct storage *s, const char *mtpt)
 232 {
 233         unsigned long swap;
 234         unsigned long capacity;
 235         unsigned long mem;
 236
 237         capacity = slice_get_capacity(storage_get_selected_slice(s));
 238         mem = storage_get_memsize(s);
 239         swap = 2 * mem;
 240         if (mem > (capacity / 2) || capacity < 4096)
 241                 swap = mem;
 242         if (mem > capacity)
 243                 swap = capacity / 2;
 244         if (swap > 8192)
 245                 swap = 8192;
 246
 247         if (capacity < DISK_MIN) {
 248                 /*
 249                  * For the purposes of this installer:
 250                  * can't be done.  Sorry.
 251                  */
 252                 return(-1);
 253         } else if (strcmp(mtpt, "/boot") == 0) {
 254                 return(256);
 255         } else if (strcmp(mtpt, "swap") == 0) {
 256                 return(swap);
 257         } else if (strcmp(mtpt, "/") == 0) {
 258                 return(-1);
 259         }
 260         /* shouldn't ever happen */
 261         return(-1);
 262 }
 263
 264 static int
 265 check_capacity(struct i_fn_args *a)
 266 {
 267         struct subpartition *sp;
 268         unsigned long min_capacity[] = {256, 0, DISK_MIN - 256, 0};
 269         unsigned long total_capacity = 0;
 270         int mtpt;
 271
 272         for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 273              sp != NULL; sp = subpartition_next(sp)) {
 274                 if (subpartition_get_capacity(sp) == -1)
 275                         total_capacity++;
 276                 else
 277                         total_capacity += subpartition_get_capacity(sp);
 278                 for (mtpt = 0; def_mountpt[mtpt] != NULL; mtpt++) {
 279                         if (strcmp(subpartition_get_mountpoint(sp), def_mountpt[mtpt]) == 0 &&
 280                             min_capacity[mtpt] > 0 &&
 281                             subpartition_get_capacity(sp) < min_capacity[mtpt]) {
 282                                 inform(a->c, _("WARNING: the %s subpartition should "
 283                                     "be at least %dM in size or you will "
 284                                     "risk running out of space during "
 285                                     "the installation."),
 286                                     subpartition_get_mountpoint(sp), min_capacity[mtpt]);
 287                         }
 288                 }
 289                 if (strcmp(subpartition_get_mountpoint(sp), "/") == 0 &&
 290                     subpartition_get_capacity(sp) < HAMMER_MIN) {
 291                         inform(a->c, _("WARNING: HAMMER file systems"
 292                         "less than 50G are not recommended!  You may"
 293                         "have to run 'hammer prune-everything' and 'hammer reblock'"
 294                         "quite often, even if using a nohistory mount."));
 295                 }
 296         }
 297
 298         if (total_capacity > slice_get_capacity(storage_get_selected_slice(a->s))) {
 299                 inform(a->c, _("The space allocated to all of your selected "
 300                     "subpartitions (%dM) exceeds the total "
 301                     "capacity of the selected primary partition "
 302                     "(%dM). Remove some subpartitions or choose "
 303                     "a smaller size for them and try again."),
 304                     total_capacity, slice_get_capacity(storage_get_selected_slice(a->s)));
 305                 return(0);
 306         }
 307
 308         return(1);
 309 }
 310
 311 static int
 312 check_subpartition_selections(struct dfui_response *r, struct i_fn_args *a)
 313 {
 314         struct dfui_dataset *ds;
 315         struct dfui_dataset *star_ds = NULL;
 316         struct aura_dict *d;
 317         const char *mountpoint, *capstring;
 318         long capacity = 0;
 319         int found_root = 0;
 320         int valid = 1;
 321
 322         d = aura_dict_new(1, AURA_DICT_LIST);
 323
 324         if ((ds = dfui_response_dataset_get_first(r)) == NULL) {
 325                 inform(a->c, _("Please set up at least one subpartition."));
 326                 valid = 0;
 327         }
 328
 329         for (ds = dfui_response_dataset_get_first(r); valid && ds != NULL;
 330             ds = dfui_dataset_get_next(ds)) {
 331 #ifdef DEBUG
 332                 dfui_dataset_dump(ds);
 333 #endif
 334                 mountpoint = dfui_dataset_get_value(ds, "mountpoint");
 335                 capstring = dfui_dataset_get_value(ds, "capacity");
 336
 337                 if (aura_dict_exists(d, mountpoint, strlen(mountpoint) + 1)) {
 338                         inform(a->c, _("The same mount point cannot be specified "
 339                             "for two different subpartitions."));
 340                         valid = 0;
 341                 }
 342
 343                 if (strcmp(mountpoint, "/") == 0)
 344                         found_root = 1;
 345
 346                 if (strcmp(capstring, "*") == 0) {
 347                         if (star_ds != NULL) {
 348                                 inform(a->c, _("You cannot have more than one subpartition "
 349                                     "with a '*' capacity (meaning 'use the remainder "
 350                                     "of the primary partition'.)"));
 351                                 valid = 0;
 352                         } else {
 353                                 star_ds = ds;
 354                         }
 355                 }
 356
 357                 if (!(!strcasecmp(mountpoint, "swap") || mountpoint[0] == '/')) {
 358                         inform(a->c, _("Mount point must be either 'swap', or it must "
 359                             "start with a '/'."));
 360                         valid = 0;
 361                 }
 362
 363                 if (strpbrk(mountpoint, " \\\"'`") != NULL) {
 364                         inform(a->c, _("Mount point may not contain the following "
 365                             "characters: blank space, backslash, or "
 366                             "single, double, or back quotes."));
 367                         valid = 0;
 368                 }
 369
 370                 if (strlen(capstring) == 0) {
 371                         inform(a->c, _("A capacity must be specified."));
 372                         valid = 0;
 373                 }
 374
 375                 if (!string_to_capacity(capstring, &capacity)) {
 376                         inform(a->c, _("Capacity must be either a '*' symbol to indicate "
 377                             "'use the rest of the primary partition', or it "
 378                             "must be a series of decimal digits ending with a "
 379                             "'M' (indicating megabytes) or a 'G' (indicating "
 380                             "gigabytes.)"));
 381                         valid = 0;
 382                 }
 383
 384                 if ((strcasecmp(mountpoint, "swap") == 0) && (capacity > 8192)) {
 385                         inform(a->c, _("Swap capacity is limited to 8G."));
 386                         valid = 0;
 387                 }
 388
 389                 /*
 390                  * If we made it through that obstacle course, all is well.
 391                  */
 392
 393                 if (valid)
 394                         aura_dict_store(d, mountpoint, strlen(mountpoint) + 1, "", 1);
 395         }
 396
 397         if (!found_root) {
 398                 inform(a->c, _("You must include a / (root) subpartition."));
 399                 valid = 0;
 400         }
 401
 402         if (aura_dict_size(d) > 16) {
 403                 inform(a->c, _("You cannot have more than 16 subpartitions "
 404                     "on a single primary partition.  Remove some "
 405                     "and try again."));
 406                 valid = 0;
 407         }
 408
 409         aura_dict_free(d);
 410
 411         return(valid);
 412 }
 413
 414 static void
 415 save_subpartition_selections(struct dfui_response *r, struct i_fn_args *a)
 416 {
 417         struct dfui_dataset *ds;
 418         const char *mountpoint, *capstring;
 419         long capacity;
 420         int valid = 1;
 421
 422         subpartitions_free(storage_get_selected_slice(a->s));
 423
 424         for (ds = dfui_response_dataset_get_first(r); valid && ds != NULL;
 425             ds = dfui_dataset_get_next(ds)) {
 426                 mountpoint = dfui_dataset_get_value(ds, "mountpoint");
 427                 capstring = dfui_dataset_get_value(ds, "capacity");
 428
 429                 if (string_to_capacity(capstring, &capacity)) {
 430                         subpartition_new_hammer(storage_get_selected_slice(a->s),
 431                              mountpoint, capacity);
 432                 }
 433         }
 434 }
 435
 436 static void
 437 populate_create_subpartitions_form(struct dfui_form *f, struct i_fn_args *a)
 438 {
 439         struct subpartition *sp;
 440         struct dfui_dataset *ds;
 441         int i;
 442         long capacity;
 443
 444         if (slice_subpartition_first(storage_get_selected_slice(a->s)) != NULL) {
 445                 /*
 446                  * The user has already given us their subpartition
 447                  * preferences, so use them here.
 448                  */
 449                 for (sp = slice_subpartition_first(storage_get_selected_slice(a->s));
 450                      sp != NULL; sp = subpartition_next(sp)) {
 451                         ds = dfui_dataset_new();
 452                         dfui_dataset_celldata_add(ds, "mountpoint",
 453                             subpartition_get_mountpoint(sp));
 454                         dfui_dataset_celldata_add(ds, "capacity",
 455                             capacity_to_string(subpartition_get_capacity(sp)));
 456                         dfui_form_dataset_add(f, ds);
 457                 }
 458         } else {
 459                 /*
 460                  * Otherwise, populate the form with datasets representing
 461                  * reasonably-calculated defaults.  The defaults are chosen
 462                  * based on the slice's total capacity and the machine's
 463                  * total physical memory (for swap.)
 464                  */
 465                 for (i = 0; def_mountpt[i] != NULL; i++) {
 466                         capacity = default_capacity(a->s, def_mountpt[i]);
 467                         ds = dfui_dataset_new();
 468                         dfui_dataset_celldata_add(ds, "mountpoint",
 469                             def_mountpt[i]);
 470                         dfui_dataset_celldata_add(ds, "capacity",
 471                             capacity_to_string(capacity));
 472                         dfui_form_dataset_add(f, ds);
 473                 }
 474         }
 475 }
 476
 477 static int
 478 warn_subpartition_selections(struct i_fn_args *a)
 479 {
 480         int valid = 0;
 481
 482         if (subpartition_find(storage_get_selected_slice(a->s), "/boot") == NULL) {
 483                 inform(a->c, _("The /boot partition must not be omitted."));
 484         } else if (subpartition_find(storage_get_selected_slice(a->s), "/home") != NULL ||
 485             subpartition_find(storage_get_selected_slice(a->s), "/tmp") != NULL ||
 486             subpartition_find(storage_get_selected_slice(a->s), "/usr") != NULL ||
 487             subpartition_find(storage_get_selected_slice(a->s), "/usr/obj") != NULL ||
 488             subpartition_find(storage_get_selected_slice(a->s), "/var") != NULL ||
 489             subpartition_find(storage_get_selected_slice(a->s), "/var/crash") != NULL ||
 490             subpartition_find(storage_get_selected_slice(a->s), "/var/tmp") != NULL) {
 491                 inform(a->c, _("Pseudo filesystems will automatically be created "
 492                         "for /home, /tmp, /usr, /usr/obj, /var, /var/crash "
 493                         "and /var/tmp and must not be specified."));
 494         } else {
 495                 valid = check_capacity(a);
 496         }
 497
 498         return(!valid);
 499 }
 500
 501 static struct dfui_form *
 502 make_create_subpartitions_form(struct i_fn_args *a)
 503 {
 504         struct dfui_form *f;
 505         char msg_buf[1][1024];
 506
 507         snprintf(msg_buf[0], sizeof(msg_buf[0]),
 508             _("Subpartitions further divide a primary partition for "
 509             "use with %s.  Some reasons you may want "
 510             "a set of subpartitions are:\n\n"
 511             "- you want to restrict how much data can be written "
 512             "to certain parts of the primary partition, to quell "
 513             "denial-of-service attacks; and\n"
 514             "- you want to speed up access to data on the disk."
 515             ""), OPERATING_SYSTEM_NAME);
 516
 517         f = dfui_form_create(
 518             "create_subpartitions",
 519             _("Create Subpartitions"),
 520             _("Set up the subpartitions (also known as just `partitions' "
 521             "in BSD tradition) you want to have on this primary "
 522             "partition. In most cases you should be fine with "
 523             "the default settings.\n\n"
 524             "For Capacity, use 'M' to indicate megabytes, 'G' to "
 525             "indicate gigabytes, or a single '*' to indicate "
 526             "'use the remaining space on the primary partition'."),
 527
 528             msg_buf[0],
 529
 530             "p", "special", "dfinstaller_create_subpartitions",
 531             "p", "minimum_width","64",
 532
 533             "f", "mountpoint", _("Mountpoint"), "", "",
 534             "f", "capacity", _("Capacity"), "", "",
 535
 536             "a", "ok", _("Accept and Create"), "", "",
 537             "a", "cancel",
 538             (disk_get_formatted(storage_get_selected_disk(a->s)) ?
 539             _("Return to Select Disk") :
 540             _("Return to Select Primary Partition")), "", "",
 541             "p", "accelerator", "ESC",
 542
 543             NULL
 544         );
 545
 546         dfui_form_set_multiple(f, 1);
 547         dfui_form_set_extensible(f, 1);
 548         /*
 549          * Remove ATM until HAMMER installer support is better
 550          * dfui_form_set_extensible(f, 1);
 551          */
 552 #if 0
 553         if (expert) {
 554                 fi = dfui_form_field_add(f, "softupdates",
 555                     dfui_info_new(_("Softupdates"), "", ""));
 556                 dfui_field_property_set(fi, "control", "checkbox");
 557
 558                 fi = dfui_form_field_add(f, "mfsbacked",
 559                     dfui_info_new(_("MFS"), "", ""));
 560                 dfui_field_property_set(fi, "control", "checkbox");
 561
 562                 fi = dfui_form_field_add(f, "fsize",
 563                     dfui_info_new(_("Frag Sz"), "", ""));
 564
 565                 fi = dfui_form_field_add(f, "bsize",
 566                     dfui_info_new(_("Block Sz"), "", ""));
 567
 568                 dfui_form_action_add(f, "switch",
 569                     dfui_info_new(_("Switch to Normal Mode"), "", ""));
 570         } else {
 571                 dfui_form_action_add(f, "switch",
 572                     dfui_info_new(_("Switch to Expert Mode"), "", ""));
 573         }
 574 #endif
 575         return(f);
 576 }
 577
 578 /*
 579  * Returns:
 580  *      -1 = the form should be redisplayed
 581  *       0 = failure, function is over
 582  *       1 = success, function is over
 583  */
 584 static int
 585 show_create_subpartitions_form(struct dfui_form *f, struct i_fn_args *a)
 586 {
 587         struct dfui_dataset *ds;
 588         struct dfui_response *r;
 589
 590         for (;;) {
 591                 if (dfui_form_dataset_get_first(f) == NULL)
 592                         populate_create_subpartitions_form(f, a);
 593
 594                 if (!dfui_be_present(a->c, f, &r))
 595                         abort_backend();
 596
 597                 if (strcmp(dfui_response_get_action_id(r), "cancel") == 0) {
 598                         dfui_response_free(r);
 599                         return(0);
 600                 } else if (strcmp(dfui_response_get_action_id(r), "switch") == 0) {
 601                         if (check_subpartition_selections(r, a)) {
 602                                 save_subpartition_selections(r, a);
 603                                 expert = expert ? 0 : 1;
 604                                 dfui_response_free(r);
 605                                 return(-1);
 606                         }
 607                 } else {
 608                         if (check_subpartition_selections(r, a)) {
 609                                 save_subpartition_selections(r, a);
 610                                 if (!warn_subpartition_selections(a)) {
 611                                         if (!create_subpartitions(a)) {
 612                                                 inform(a->c, _("The subpartitions you chose were "
 613                                                         "not correctly created, and the "
 614                                                         "primary partition may "
 615                                                         "now be in an inconsistent state. "
 616                                                         "We recommend re-formatting it "
 617                                                         "before proceeding."));
 618                                                 dfui_response_free(r);
 619                                                 return(0);
 620                                         } else {
 621                                                 dfui_response_free(r);
 622                                                 return(1);
 623                                         }
 624                                 }
 625                         }
 626                 }
 627
 628                 dfui_form_datasets_free(f);
 629                 /* dfui_form_datasets_add_from_response(f, r); */
 630                 for (ds = dfui_response_dataset_get_first(r); ds != NULL;
 631                     ds = dfui_dataset_get_next(ds)) {
 632                         dfui_form_dataset_add(f, dfui_dataset_dup(ds));
 633                 }
 634         }
 635 }
 636
 637 /*
 638  * fn_create_subpartitions_hammer: let the user specify what subpartitions they
 639  * want on the disk, how large each should be, and where it should be mounted.
 640  */
 641 void
 642 fn_create_subpartitions_hammer(struct i_fn_args *a)
 643 {
 644         struct dfui_form *f;
 645         int done = 0;
 646
 647         a->result = 0;
 648         while (!done) {
 649                 f = make_create_subpartitions_form(a);
 650                 switch (show_create_subpartitions_form(f, a)) {
 651                 case -1:
 652                         done = 0;
 653                         break;
 654                 case 0:
 655                         done = 1;
 656                         a->result = 0;
 657                         break;
 658                 case 1:
 659                         done = 1;
 660                         a->result = 1;
 661                         break;
 662                 }
 663                 dfui_form_free(f);
 664         }
 665 }