cmd/part.c

   1 /*
   2  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * made from cmd_ext2, which was:
   5  *
   6  * (C) Copyright 2004
   7  * esd gmbh <www.esd-electronics.com>
   8  * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
   9  *
  10  * made from cmd_reiserfs by
  11  *
  12  * (C) Copyright 2003 - 2004
  13  * Sysgo Real-Time Solutions, AG <www.elinos.com>
  14  * Pavel Bartusek <pba@sysgo.com>
  15  *
  16  * SPDX-License-Identifier:     GPL-2.0+
  17  */
  18
  19 #include <common.h>
  20 #include <config.h>
  21 #include <command.h>
  22 #include <part.h>
  23 #include <vsprintf.h>
  24
  25 static int do_part_uuid(int argc, char * const argv[])
  26 {
  27         int part;
  28         struct blk_desc *dev_desc;
  29         disk_partition_t info;
  30
  31         if (argc < 2)
  32                 return CMD_RET_USAGE;
  33         if (argc > 3)
  34                 return CMD_RET_USAGE;
  35
  36         part = blk_get_device_part_str(argv[0], argv[1], &dev_desc, &info, 0);
  37         if (part < 0)
  38                 return 1;
  39
  40         if (argc > 2)
  41                 setenv(argv[2], info.uuid);
  42         else
  43                 printf("%s\n", info.uuid);
  44
  45         return 0;
  46 }
  47
  48 static int do_part_list(int argc, char * const argv[])
  49 {
  50         int ret;
  51         struct blk_desc *desc;
  52         char *var = NULL;
  53         bool bootable = false;
  54         int i;
  55
  56         if (argc < 2)
  57                 return CMD_RET_USAGE;
  58
  59         if (argc > 2) {
  60                 for (i = 2; i < argc ; i++) {
  61                         if (argv[i][0] == '-') {
  62                                 if (!strcmp(argv[i], "-bootable")) {
  63                                         bootable = true;
  64                                 } else {
  65                                         printf("Unknown option %s\n", argv[i]);
  66                                         return CMD_RET_USAGE;
  67                                 }
  68                         } else {
  69                                 var = argv[i];
  70                                 break;
  71                         }
  72                 }
  73
  74                 /* Loops should have been exited at the last argument, which
  75                  * as it contained the variable */
  76                 if (argc != i + 1)
  77                         return CMD_RET_USAGE;
  78         }
  79
  80         ret = blk_get_device_by_str(argv[0], argv[1], &desc);
  81         if (ret < 0)
  82                 return 1;
  83
  84         if (var != NULL) {
  85                 int p;
  86                 char str[512] = { '\0', };
  87                 disk_partition_t info;
  88
  89                 for (p = 1; p < 128; p++) {
  90                         char t[5];
  91                         int r = part_get_info(desc, p, &info);
  92
  93                         if (r != 0)
  94                                 continue;
  95
  96                         if (bootable && !info.bootable)
  97                                 continue;
  98
  99                         sprintf(t, "%s%x", str[0] ? " " : "", p);
 100                         strcat(str, t);
 101                 }
 102                 setenv(var, str);
 103                 return 0;
 104         }
 105
 106         part_print(desc);
 107
 108         return 0;
 109 }
 110
 111 static int do_part_start(int argc, char * const argv[])
 112 {
 113         struct blk_desc *desc;
 114         disk_partition_t info;
 115         char buf[512] = { 0 };
 116         int part;
 117         int err;
 118         int ret;
 119
 120         if (argc < 3)
 121                 return CMD_RET_USAGE;
 122         if (argc > 4)
 123                 return CMD_RET_USAGE;
 124
 125         part = simple_strtoul(argv[2], NULL, 0);
 126
 127         ret = blk_get_device_by_str(argv[0], argv[1], &desc);
 128         if (ret < 0)
 129                 return 1;
 130
 131         err = part_get_info(desc, part, &info);
 132         if (err)
 133                 return 1;
 134
 135         snprintf(buf, sizeof(buf), LBAF, info.start);
 136
 137         if (argc > 3)
 138                 setenv(argv[3], buf);
 139         else
 140                 printf("%s\n", buf);
 141
 142         return 0;
 143 }
 144
 145 static int do_part_size(int argc, char * const argv[])
 146 {
 147         struct blk_desc *desc;
 148         disk_partition_t info;
 149         char buf[512] = { 0 };
 150         int part;
 151         int err;
 152         int ret;
 153
 154         if (argc < 3)
 155                 return CMD_RET_USAGE;
 156         if (argc > 4)
 157                 return CMD_RET_USAGE;
 158
 159         part = simple_strtoul(argv[2], NULL, 0);
 160
 161         ret = blk_get_device_by_str(argv[0], argv[1], &desc);
 162         if (ret < 0)
 163                 return 1;
 164
 165         err = part_get_info(desc, part, &info);
 166         if (err)
 167                 return 1;
 168
 169         snprintf(buf, sizeof(buf), LBAF, info.size);
 170
 171         if (argc > 3)
 172                 setenv(argv[3], buf);
 173         else
 174                 printf("%s\n", buf);
 175
 176         return 0;
 177 }
 178
 179 static int do_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 180 {
 181         if (argc < 2)
 182                 return CMD_RET_USAGE;
 183
 184         if (!strcmp(argv[1], "uuid"))
 185                 return do_part_uuid(argc - 2, argv + 2);
 186         else if (!strcmp(argv[1], "list"))
 187                 return do_part_list(argc - 2, argv + 2);
 188         else if (!strcmp(argv[1], "start"))
 189                 return do_part_start(argc - 2, argv + 2);
 190         else if (!strcmp(argv[1], "size"))
 191                 return do_part_size(argc - 2, argv + 2);
 192
 193         return CMD_RET_USAGE;
 194 }
 195
 196 U_BOOT_CMD(
 197         part,   CONFIG_SYS_MAXARGS,     1,      do_part,
 198         "disk partition related commands",
 199         "uuid <interface> <dev>:<part>\n"
 200         "    - print partition UUID\n"
 201         "part uuid <interface> <dev>:<part> <varname>\n"
 202         "    - set environment variable to partition UUID\n"
 203         "part list <interface> <dev>\n"
 204         "    - print a device's partition table\n"
 205         "part list <interface> <dev> [flags] <varname>\n"
 206         "    - set environment variable to the list of partitions\n"
 207         "      flags can be -bootable (list only bootable partitions)\n"
 208         "part start <interface> <dev> <part> <varname>\n"
 209         "    - set environment variable to the start of the partition (in blocks)\n"
 210         "part size <interface> <dev> <part> <varname>\n"
 211         "    - set environment variable to the size of the partition (in blocks)"
 212 );