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 #ifndef CONFIG_PARTITION_UUIDS
  26 #error CONFIG_PARTITION_UUIDS must be enabled for CONFIG_CMD_PART to be enabled
  27 #endif
  28
  29 static int do_part_uuid(int argc, char * const argv[])
  30 {
  31         int part;
  32         block_dev_desc_t *dev_desc;
  33         disk_partition_t info;
  34
  35         if (argc < 2)
  36                 return CMD_RET_USAGE;
  37         if (argc > 3)
  38                 return CMD_RET_USAGE;
  39
  40         part = get_device_and_partition(argv[0], argv[1], &dev_desc, &info, 0);
  41         if (part < 0)
  42                 return 1;
  43
  44         if (argc > 2)
  45                 setenv(argv[2], info.uuid);
  46         else
  47                 printf("%s\n", info.uuid);
  48
  49         return 0;
  50 }
  51
  52 static int do_part_list(int argc, char * const argv[])
  53 {
  54         int ret;
  55         block_dev_desc_t *desc;
  56         char *var = NULL;
  57         bool bootable = false;
  58         int i;
  59
  60         if (argc < 2)
  61                 return CMD_RET_USAGE;
  62
  63         if (argc > 2) {
  64                 for (i = 2; i < argc ; i++) {
  65                         if (argv[i][0] == '-') {
  66                                 if (!strcmp(argv[i], "-bootable")) {
  67                                         bootable = true;
  68                                 } else {
  69                                         printf("Unknown option %s\n", argv[i]);
  70                                         return CMD_RET_USAGE;
  71                                 }
  72                         } else {
  73                                 var = argv[i];
  74                                 break;
  75                         }
  76                 }
  77
  78                 /* Loops should have been exited at the last argument, which
  79                  * as it contained the variable */
  80                 if (argc != i + 1)
  81                         return CMD_RET_USAGE;
  82         }
  83
  84         ret = get_device(argv[0], argv[1], &desc);
  85         if (ret < 0)
  86                 return 1;
  87
  88         if (var != NULL) {
  89                 int p;
  90                 char str[512] = { '\0', };
  91                 disk_partition_t info;
  92
  93                 for (p = 1; p < 128; p++) {
  94                         char t[5];
  95                         int r = get_partition_info(desc, p, &info);
  96
  97                         if (r != 0)
  98                                 continue;
  99
 100                         if (bootable && !info.bootable)
 101                                 continue;
 102
 103                         sprintf(t, "%s%x", str[0] ? " " : "", p);
 104                         strcat(str, t);
 105                 }
 106                 setenv(var, str);
 107                 return 0;
 108         }
 109
 110         print_part(desc);
 111
 112         return 0;
 113 }
 114
 115 static int do_part_start(int argc, char * const argv[])
 116 {
 117         block_dev_desc_t *desc;
 118         disk_partition_t info;
 119         char buf[512] = { 0 };
 120         int part;
 121         int err;
 122         int ret;
 123
 124         if (argc < 3)
 125                 return CMD_RET_USAGE;
 126         if (argc > 4)
 127                 return CMD_RET_USAGE;
 128
 129         part = simple_strtoul(argv[2], NULL, 0);
 130
 131         ret = get_device(argv[0], argv[1], &desc);
 132         if (ret < 0)
 133                 return 1;
 134
 135         err = get_partition_info(desc, part, &info);
 136         if (err)
 137                 return 1;
 138
 139         snprintf(buf, sizeof(buf), LBAF, info.start);
 140
 141         if (argc > 3)
 142                 setenv(argv[3], buf);
 143         else
 144                 printf("%s\n", buf);
 145
 146         return 0;
 147 }
 148
 149 static int do_part_size(int argc, char * const argv[])
 150 {
 151         block_dev_desc_t *desc;
 152         disk_partition_t info;
 153         char buf[512] = { 0 };
 154         int part;
 155         int err;
 156         int ret;
 157
 158         if (argc < 3)
 159                 return CMD_RET_USAGE;
 160         if (argc > 4)
 161                 return CMD_RET_USAGE;
 162
 163         part = simple_strtoul(argv[2], NULL, 0);
 164
 165         ret = get_device(argv[0], argv[1], &desc);
 166         if (ret < 0)
 167                 return 1;
 168
 169         err = get_partition_info(desc, part, &info);
 170         if (err)
 171                 return 1;
 172
 173         snprintf(buf, sizeof(buf), LBAF, info.size);
 174
 175         if (argc > 3)
 176                 setenv(argv[3], buf);
 177         else
 178                 printf("%s\n", buf);
 179
 180         return 0;
 181 }
 182
 183 static int do_part(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 184 {
 185         if (argc < 2)
 186                 return CMD_RET_USAGE;
 187
 188         if (!strcmp(argv[1], "uuid"))
 189                 return do_part_uuid(argc - 2, argv + 2);
 190         else if (!strcmp(argv[1], "list"))
 191                 return do_part_list(argc - 2, argv + 2);
 192         else if (!strcmp(argv[1], "start"))
 193                 return do_part_start(argc - 2, argv + 2);
 194         else if (!strcmp(argv[1], "size"))
 195                 return do_part_size(argc - 2, argv + 2);
 196
 197         return CMD_RET_USAGE;
 198 }
 199
 200 U_BOOT_CMD(
 201         part,   CONFIG_SYS_MAXARGS,     1,      do_part,
 202         "disk partition related commands",
 203         "uuid <interface> <dev>:<part>\n"
 204         "    - print partition UUID\n"
 205         "part uuid <interface> <dev>:<part> <varname>\n"
 206         "    - set environment variable to partition UUID\n"
 207         "part list <interface> <dev>\n"
 208         "    - print a device's partition table\n"
 209         "part list <interface> <dev> [flags] <varname>\n"
 210         "    - set environment variable to the list of partitions\n"
 211         "      flags can be -bootable (list only bootable partitions)\n"
 212         "part start <interface> <dev> <part> <varname>\n"
 213         "    - set environment variable to the start of the partition (in blocks)\n"
 214         "part size <interface> <dev> <part> <varname>\n"
 215         "    - set environment variable to the size of the partition (in blocks)"
 216 );