[src/trunk]: src/usr.sbin/sysinst Avoid creating a (tiny) swap partition by d...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/41cd24ed1f95
branches:  trunk
changeset: 452183:41cd24ed1f95
user:      martin <martin%NetBSD.org@localhost>
date:      Thu Jun 20 19:26:41 2019 +0000

description:
Avoid creating a (tiny) swap partition by default on overall too small
disks.

diffstat:

 usr.sbin/sysinst/bsddisklabel.c |  33 ++++++++++++++++++++++++---------
 1 files changed, 24 insertions(+), 9 deletions(-)

diffs (72 lines):

diff -r bf408156cf66 -r 41cd24ed1f95 usr.sbin/sysinst/bsddisklabel.c
--- a/usr.sbin/sysinst/bsddisklabel.c   Thu Jun 20 18:32:32 2019 +0000
+++ b/usr.sbin/sysinst/bsddisklabel.c   Thu Jun 20 19:26:41 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bsddisklabel.c,v 1.14 2019/06/20 15:52:07 christos Exp $       */
+/*     $NetBSD: bsddisklabel.c,v 1.15 2019/06/20 19:26:41 martin Exp $ */
 
 /*
  * Copyright 1997 Piermont Information Systems Inc.
@@ -987,8 +987,8 @@
 fill_defaults(struct partition_usage_set *wanted, struct disk_partitions *parts,
     daddr_t ptstart, daddr_t ptsize)
 {
-       size_t i, root = ~0U, usr = ~0U, swap = ~0U;
-       daddr_t free_space, dump_space;
+       size_t i, root = ~0U, usr = ~0U, swap = ~0U, def_usr = ~0U;
+       daddr_t free_space, dump_space, required;
 #if defined(DEFAULT_UFS2) && !defined(HAVE_UFS2_BOOT)
        size_t boot = ~0U;
 #endif
@@ -1017,12 +1017,16 @@
                if (wanted->infos[i].instflags & PUIINST_BOOT)
                        boot = i;
 #endif
-               if (wanted->infos[i].type == PT_root
-                   && wanted->infos[i].size > 0) {
-                       if (strcmp(wanted->infos[i].mount, "/") == 0)
+               if (wanted->infos[i].type == PT_root) {
+                       if (strcmp(wanted->infos[i].mount, "/") == 0) {
                                root = i;
-                       else if (strcmp(wanted->infos[i].mount, "/usr") == 0)
-                               usr = i;
+                       } else if (
+                           strcmp(wanted->infos[i].mount, "/usr") == 0) {
+                               if (wanted->infos[i].size > 0)
+                                       usr = i;
+                               else
+                                       def_usr = i;
+                       }
                        wanted->infos[i].fs_type = FS_BSDFFS;
 #ifdef DEFAULT_UFS2
 #ifndef HAVE_UFS2_BOOT
@@ -1130,9 +1134,21 @@
         * impossible defaults.
         */
        free_space = parts->free_space;
+       required = 0;
+       if (root < wanted->num)
+               required += wanted->infos[root].size;
+       if (usr < wanted->num)
+               required += wanted->infos[usr].size;
+       else if (def_usr < wanted->num)
+                       required += wanted->infos[def_usr].def_size;
+       free_space -= required;
        for (i = 0; i < wanted->num; i++) {
+               if (i == root || i == usr)
+                       continue;       /* already accounted above */
                if (wanted->infos[i].cur_part_id != NO_PART)
                        continue;
+               if (wanted->infos[i].size == 0)
+                       continue;
                if (wanted->infos[i].flags
                    & (PUIFLG_IS_OUTER|PUIFLG_JUST_MOUNTPOINT))
                        continue;
@@ -1147,7 +1163,6 @@
                free_space += inc;
                wanted->infos[swap].size -= inc;
        }
-
        if (root < wanted->num) {
                /* Add space for 2 system dumps to / (traditional) */
                dump_space = get_ramsize() * (MEG/512);