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gpt: command: Extend gpt command to support GPT table verification

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This commit adds support for "gpt verify" command, which verifies
correctness of on-board stored GPT partition table.
As the optional parameter one can provide '$partitons' environment variable
to check if partition data (size, offset, name) is correct.

This command should be regarded as complementary one to "gpt restore".

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Przemyslaw Marczak <p.marczak@samsung.com>
This commit is contained in:
Lukasz Majewski 2015-11-20 08:06:17 +01:00 committed by Tom Rini
parent cef68bf904
commit bbb9ffac60
1 changed files with 67 additions and 25 deletions
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92
common/cmd_gpt.c
View file

@ -1,6 +1,9 @@
/*
* cmd_gpt.c -- GPT (GUID Partition Table) handling command
*
* Copyright (C) 2015
* Lukasz Majewski <l.majewski@majess.pl>
*
* Copyright (C) 2012 Samsung Electronics
* author: Lukasz Majewski <l.majewski@samsung.com>
* author: Piotr Wilczek <p.wilczek@samsung.com>
@ -15,6 +18,7 @@
#include <exports.h>
#include <linux/ctype.h>
#include <div64.h>
#include <memalign.h>
#ifndef CONFIG_PARTITION_UUIDS
#error CONFIG_PARTITION_UUIDS must be enabled for CONFIG_CMD_GPT to be enabled
@ -314,6 +318,43 @@ static int gpt_default(block_dev_desc_t *blk_dev_desc, const char *str_part)
return ret;
}
static int gpt_verify(block_dev_desc_t *blk_dev_desc, const char *str_part)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1,
blk_dev_desc->blksz);
disk_partition_t *partitions = NULL;
gpt_entry *gpt_pte = NULL;
char *str_disk_guid;
u8 part_count = 0;
int ret = 0;
/* fill partitions */
ret = set_gpt_info(blk_dev_desc, str_part,
&str_disk_guid, &partitions, &part_count);
if (ret) {
if (ret == -1) {
printf("No partition list provided - only basic check\n");
ret = gpt_verify_headers(blk_dev_desc, gpt_head,
&gpt_pte);
goto out;
}
if (ret == -2)
printf("Missing disk guid\n");
if ((ret == -3) || (ret == -4))
printf("Partition list incomplete\n");
return -1;
}
/* Check partition layout with provided pattern */
ret = gpt_verify_partitions(blk_dev_desc, partitions, part_count,
gpt_head, &gpt_pte);
free(str_disk_guid);
free(partitions);
out:
free(gpt_pte);
return ret;
}
/**
* do_gpt(): Perform GPT operations
*
@ -329,39 +370,40 @@ static int do_gpt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int ret = CMD_RET_SUCCESS;
int dev = 0;
char *ep;
block_dev_desc_t *blk_dev_desc;
block_dev_desc_t *blk_dev_desc = NULL;
if (argc < 5)
if (argc < 4 || argc > 5)
return CMD_RET_USAGE;
/* command: 'write' */
dev = (int)simple_strtoul(argv[3], &ep, 10);
if (!ep || ep[0] != '\0') {
printf("'%s' is not a number\n", argv[3]);
return CMD_RET_USAGE;
}
blk_dev_desc = get_dev(argv[2], dev);
if (!blk_dev_desc) {
printf("%s: %s dev %d NOT available\n",
__func__, argv[2], dev);
return CMD_RET_FAILURE;
}
if ((strcmp(argv[1], "write") == 0) && (argc == 5)) {
dev = (int)simple_strtoul(argv[3], &ep, 10);
if (!ep || ep[0] != '\0') {
printf("'%s' is not a number\n", argv[3]);
return CMD_RET_USAGE;
}
blk_dev_desc = get_dev(argv[2], dev);
if (!blk_dev_desc) {
printf("%s: %s dev %d NOT available\n",
__func__, argv[2], dev);
return CMD_RET_FAILURE;
}
puts("Writing GPT: ");
printf("Writing GPT: ");
ret = gpt_default(blk_dev_desc, argv[4]);
if (!ret) {
puts("success!\n");
return CMD_RET_SUCCESS;
} else {
puts("error!\n");
return CMD_RET_FAILURE;
}
} else if ((strcmp(argv[1], "verify") == 0)) {
ret = gpt_verify(blk_dev_desc, argv[4]);
printf("Verify GPT: ");
} else {
return CMD_RET_USAGE;
}
return ret;
if (ret) {
printf("error!\n");
return CMD_RET_FAILURE;
}
printf("success!\n");
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(gpt, CONFIG_SYS_MAXARGS, 1, do_gpt,