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authorLukasz Majewski <l.majewski@majess.pl>2015-11-20 08:06:17 +0100
committerTom Rini <trini@konsulko.com>2015-11-23 11:01:51 -0500
commitbbb9ffac6066c708bc764e6603e6a54c4c7bb995 (patch)
treef1ddec75ea6e10e1b670b725c0d15c8ecebc4327
parentcef68bf9042dda6b77b5845a25f37b9ea882074b (diff)
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gpt: command: Extend gpt command to support GPT table verification
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>
-rw-r--r--common/cmd_gpt.c92
1 files changed, 67 insertions, 25 deletions
diff --git a/common/cmd_gpt.c b/common/cmd_gpt.c
index 12419b6..460809c 100644
--- a/common/cmd_gpt.c
+++ b/common/cmd_gpt.c
@@ -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' */
- 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: ");
+ 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)) {
+ 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,