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      1 /*-
      2  * Copyright (c) 2002 Marcel Moolenaar
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #if HAVE_NBTOOL_CONFIG_H
     28 #include "nbtool_config.h"
     29 #endif
     30 
     31 #include <sys/cdefs.h>
     32 #ifdef __FBSDID
     33 __FBSDID("$FreeBSD: src/sbin/gpt/add.c,v 1.14 2006/06/22 22:05:28 marcel Exp $");
     34 #endif
     35 #ifdef __RCSID
     36 __RCSID("$NetBSD: resize.c,v 1.27 2025/12/17 15:56:06 nia Exp $");
     37 #endif
     38 
     39 #include <sys/types.h>
     40 #if defined(HAVE_SYS_ENDIAN_H) || ! defined(HAVE_NBTOOL_CONFIG_H)
     41 #include <sys/endian.h>
     42 #endif
     43 
     44 #include <err.h>
     45 #include <stdbool.h>
     46 #include <stddef.h>
     47 #include <stdio.h>
     48 #include <stdlib.h>
     49 #include <string.h>
     50 #include <unistd.h>
     51 
     52 #include "map.h"
     53 #include "gpt.h"
     54 #include "gpt_private.h"
     55 
     56 static int cmd_resize(gpt_t, int, char *[]);
     57 
     58 static const char *resizehelp[] = {
     59 	"[-i index | -b blocknr] [-a alignment] [-s size] [-q]",
     60 };
     61 
     62 const struct gpt_cmd c_resize = {
     63 	"resize",
     64 	cmd_resize,
     65 	resizehelp, __arraycount(resizehelp),
     66 	GPT_SYNC,
     67 };
     68 
     69 #define usage() gpt_usage(NULL, &c_resize)
     70 
     71 static int
     72 resize(gpt_t gpt, u_int entry, off_t alignment, off_t sectors,
     73     off_t size __unused, bool quiet)
     74 {
     75 	map_t map;
     76 	struct gpt_ent *ent;
     77 	unsigned int i;
     78 	off_t alignsecs, newsize, oldsize;
     79 	uint64_t end;
     80 
     81 
     82 	if (gpt_hdr(gpt) == NULL)
     83 		return -1;
     84 
     85 	i = entry - 1;
     86 	ent = gpt_ent_primary(gpt, i);
     87 	if (gpt_uuid_is_nil(ent->ent_type)) {
     88 		gpt_warnx(gpt, "Entry at index %u is unused", entry);
     89 		return -1;
     90 	}
     91 
     92 	alignsecs = alignment / gpt->secsz;
     93 
     94 	for (map = map_first(gpt); map != NULL; map = map->map_next) {
     95 		if (entry == map->map_index)
     96 			break;
     97 	}
     98 	if (map == NULL) {
     99 		gpt_warnx(gpt, "Could not find map entry corresponding "
    100 		    "to index");
    101 		return -1;
    102 	}
    103 
    104 	if (sectors > 0 && sectors == map->map_size)
    105 		if (alignment == 0 ||
    106 		    (alignment > 0 && sectors % alignsecs == 0)) {
    107 			/* nothing to do */
    108 			if (!quiet)
    109 				gpt_warnx(gpt,
    110 				    "partition does not need resizing");
    111 			return 0;
    112 		}
    113 
    114 	oldsize = map->map_size;
    115 	newsize = map_resize(gpt, map, sectors, alignsecs);
    116 	if (newsize == -1)
    117 		return -1;
    118 
    119 	if (oldsize == newsize) {
    120 		/* Nothing to do */
    121 		if (!quiet)
    122 			gpt_warnx(gpt,
    123 			    "partition does not need resizing");
    124 		return 0;
    125 	}
    126 
    127 	end = htole64((uint64_t)(map->map_start + newsize - 1LL));
    128 	ent->ent_lba_end = end;
    129 
    130 	if (gpt_write_primary(gpt) == -1)
    131 		return -1;
    132 
    133 	ent = gpt_ent(gpt->gpt, gpt->lbt, i);
    134 	ent->ent_lba_end = end;
    135 
    136 	if (gpt_write_backup(gpt) == -1)
    137 		return -1;
    138 
    139 	gpt_msg(gpt, "Partition %d resized: %" PRIu64 " %" PRIu64, entry,
    140 	    map->map_start, newsize);
    141 
    142 	return 0;
    143 }
    144 
    145 static int
    146 cmd_resize(gpt_t gpt, int argc, char *argv[])
    147 {
    148 	int ch;
    149 	off_t alignment = 0, sectors, start = 0, size = 0;
    150 	unsigned int entry = 0;
    151 	map_t m;
    152 	bool quiet = false;
    153 
    154 	while ((ch = getopt(argc, argv, GPT_AIS "b:q")) != -1) {
    155 		if (ch == 'b')
    156 			gpt_human_get(gpt, &start);
    157 		else if (ch == 'q')
    158 			quiet = true;
    159 		else if (gpt_add_ais(gpt, &alignment, &entry, &size, ch) == -1)
    160 			return usage();
    161 	}
    162 
    163 	if (argc != optind)
    164 		return usage();
    165 
    166 	if (start > 0) {
    167 		for (m = map_first(gpt); m != NULL; m = m->map_next) {
    168 			if (m->map_type != MAP_TYPE_GPT_PART ||
    169 			    m->map_index < 1)
    170 				continue;
    171 			if (start != m->map_start)
    172 				continue;
    173 			entry = m->map_index;
    174 			break;
    175 		}
    176 	}
    177 
    178 	if ((sectors = gpt_check_ais(gpt, alignment, entry, size)) == -1)
    179 		return -1;
    180 
    181 	return resize(gpt, entry, alignment, sectors, size, quiet);
    182 }
    183