U-Boot. Исходные тексты команд: gpt.c // SPDX-License-Identifier: GPL-2.0+
/*
* 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>
*/
#include <common.h>
#include <blk.h>
#include <env.h>
#include <log.h>
#include <malloc.h>
#include <command.h>
#include <part.h>
#include <part_efi.h>
#include <part.h>
#include <exports.h>
#include <uuid.h>
#include <linux/ctype.h>
#include <div64.h>
#include <memalign.h>
#include <linux/compat.h>
#include <linux/err.h>
#include <linux/sizes.h>
#include <stdlib.h>
static LIST_HEAD(disk_partitions);
/**
* extract_env(): Expand env name from string format '&{env_name}'
* and return pointer to the env (if the env is set)
*
* @param str - pointer to string
* @param env - pointer to pointer to extracted env
*
* Return: - zero on successful expand and env is set
*/
static int extract_env(const char *str, char **env)
{
int ret = -1;
char *e, *s;
#ifdef CONFIG_RANDOM_UUID
char uuid_str[UUID_STR_LEN + 1];
#endif
if (!str || strlen(str) < 4)
return -1;
if (!((strncmp(str, "${", 2) == 0) && (str[strlen(str) - 1] == '}')))
return -1;
s = strdup(str);
if (s == NULL)
return -1;
memset(s + strlen(s) - 1, '\0', 1);
memmove(s, s + 2, strlen(s) - 1);
e = env_get(s);
if (e == NULL) {
#ifdef CONFIG_RANDOM_UUID
debug("%s unset. ", str);
gen_rand_uuid_str(uuid_str, UUID_STR_FORMAT_GUID);
env_set(s, uuid_str);
e = env_get(s);
if (e) {
debug("Set to random.\n");
ret = 0;
} else {
debug("Can't get random UUID.\n");
}
#else
debug("%s unset.\n", str);
#endif
} else {
debug("%s get from environment.\n", str);
ret = 0;
}
*env = e;
free(s);
return ret;
}
/**
* extract_val(): Extract value from a key=value pair list (comma separated).
* Only value for the given key is returend.
* Function allocates memory for the value, remember to free!
*
* @param str - pointer to string with key=values pairs
* @param key - pointer to the key to search for
*
* Return: - pointer to allocated string with the value
*/
static char *extract_val(const char *str, const char *key)
{
char *v, *k;
char *s, *strcopy;
char *new = NULL;
strcopy = strdup(str);
if (strcopy == NULL)
return NULL;
s = strcopy;
while (s) {
v = strsep(&s, ",");
if (!v)
break;
k = strsep(&v, "=");
if (!k)
break;
if (strcmp(k, key) == 0) {
new = strdup(v);
break;
}
}
free(strcopy);
return new;
}
/**
* found_key(): Found key without value in parameter list (comma separated).
*
* @param str - pointer to string with key
* @param key - pointer to the key to search for
*
* Return: - true on found key
*/
static bool found_key(const char *str, const char *key)
{
char *k;
char *s, *strcopy;
bool result = false;
strcopy = strdup(str);
if (!strcopy)
return NULL;
s = strcopy;
while (s) {
k = strsep(&s, ",");
if (!k)
break;
if (strcmp(k, key) == 0) {
result = true;
break;
}
}
free(strcopy);
return result;
}
/**
* calc_parts_list_len() - get size of partition table description
*
* @numparts: number of partitions
* Return: string size including terminating NUL
*/
static int calc_parts_list_len(int numparts)
{
/* number of hexadecimal digits of the lbaint_t representation */
const int lbaint_size = 2 * sizeof(lbaint_t);
int partlistlen;
/* media description including terminating NUL */
partlistlen = strlen("uuid_disk=;") + UUID_STR_LEN + 1;
/* per-partition descriptions; numparts */
partlistlen += numparts * (strlen("name=,") + PART_NAME_LEN);
/* see part.h for definition of struct disk_partition */
partlistlen += numparts * (strlen("start=0x,") + lbaint_size);
partlistlen += numparts * (strlen("size=0x,") + lbaint_size);
if (IS_ENABLED(CONFIG_PARTITION_UUIDS))
partlistlen += numparts * (strlen("uuid=,") + UUID_STR_LEN);
if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))
partlistlen += numparts * (strlen("type=;") + UUID_STR_LEN);
debug("Length of partitions_list is %d for %d partitions\n",
partlistlen, numparts);
return partlistlen;
}
#ifdef CONFIG_CMD_GPT_RENAME
static void del_gpt_info(void)
{
struct list_head *pos = &disk_partitions;
struct disk_part *curr;
while (!list_empty(pos)) {
curr = list_entry(pos->next, struct disk_part, list);
list_del(pos->next);
free(curr);
}
}
static struct disk_part *allocate_disk_part(struct disk_partition *info,
int partnum)
{
struct disk_part *newpart;
newpart = calloc(1, sizeof(struct disk_part));
if (!newpart)
return ERR_PTR(-ENOMEM);
newpart->gpt_part_info.start = info->start;
newpart->gpt_part_info.size = info->size;
newpart->gpt_part_info.blksz = info->blksz;
strncpy((char *)newpart->gpt_part_info.name, (const char *)info->name,
PART_NAME_LEN);
newpart->gpt_part_info.name[PART_NAME_LEN - 1] = '\0';
strncpy((char *)newpart->gpt_part_info.type, (const char *)info->type,
PART_TYPE_LEN);
newpart->gpt_part_info.type[PART_TYPE_LEN - 1] = '\0';
newpart->gpt_part_info.bootable = info->bootable;
if (IS_ENABLED(CONFIG_PARTITION_UUIDS))
disk_partition_set_uuid(&newpart->gpt_part_info,
disk_partition_uuid(info));
if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))
disk_partition_set_type_guid(&newpart->gpt_part_info,
disk_partition_type_guid(info));
newpart->partnum = partnum;
return newpart;
}
static void prettyprint_part_size(char *sizestr, lbaint_t partsize,
lbaint_t blksize)
{
unsigned long long partbytes, partmegabytes;
partbytes = partsize * blksize;
partmegabytes = lldiv(partbytes, SZ_1M);
snprintf(sizestr, 16, "%lluMiB", partmegabytes);
}
static void print_gpt_info(void)
{
struct list_head *pos;
struct disk_part *curr;
char partstartstr[16];
char partsizestr[16];
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
prettyprint_part_size(partstartstr, curr->gpt_part_info.start,
curr->gpt_part_info.blksz);
prettyprint_part_size(partsizestr, curr->gpt_part_info.size,
curr->gpt_part_info.blksz);
printf("Partition %d:\n", curr->partnum);
printf("Start %s, size %s\n", partstartstr, partsizestr);
printf("Block size %lu, name %s\n", curr->gpt_part_info.blksz,
curr->gpt_part_info.name);
printf("Type %s, bootable %d\n", curr->gpt_part_info.type,
curr->gpt_part_info.bootable & PART_BOOTABLE);
if (CONFIG_IS_ENABLED(PARTITION_UUIDS))
printf("UUID %s\n",
disk_partition_uuid(&curr->gpt_part_info));
if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))
printf("Type GUID %s\n",
disk_partition_type_guid(&curr->gpt_part_info));
printf("\n");
}
}
/*
* create the string that upstream 'gpt write' command will accept as an
* argument
*
* From doc/README.gpt, Format of partitions layout:
* "uuid_disk=...;name=u-boot,size=60MiB,uuid=...;
* name=kernel,size=60MiB,uuid=...;"
* The fields 'name' and 'size' are mandatory for every partition.
* The field 'start' is optional. The fields 'uuid' and 'uuid_disk'
* are optional if CONFIG_RANDOM_UUID is enabled.
*/
static int create_gpt_partitions_list(int numparts, const char *guid,
char *partitions_list)
{
struct list_head *pos;
struct disk_part *curr;
char partstr[PART_NAME_LEN + 1];
if (!partitions_list)
return -EINVAL;
strcpy(partitions_list, "uuid_disk=");
strncat(partitions_list, guid, UUID_STR_LEN + 1);
strcat(partitions_list, ";");
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
strcat(partitions_list, "name=");
strncat(partitions_list, (const char *)curr->gpt_part_info.name,
PART_NAME_LEN + 1);
sprintf(partstr, ",start=0x%llx",
(unsigned long long)curr->gpt_part_info.start *
curr->gpt_part_info.blksz);
/* one extra byte for NULL */
strncat(partitions_list, partstr, PART_NAME_LEN + 1);
sprintf(partstr, ",size=0x%llx",
(unsigned long long)curr->gpt_part_info.size *
curr->gpt_part_info.blksz);
strncat(partitions_list, partstr, PART_NAME_LEN + 1);
if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID)) {
strcat(partitions_list, ",type=");
strncat(partitions_list,
disk_partition_type_guid(&curr->gpt_part_info),
UUID_STR_LEN + 1);
}
if (CONFIG_IS_ENABLED(PARTITION_UUIDS)) {
strcat(partitions_list, ",uuid=");
strncat(partitions_list,
disk_partition_uuid(&curr->gpt_part_info),
UUID_STR_LEN + 1);
}
if (curr->gpt_part_info.bootable & PART_BOOTABLE)
strcat(partitions_list, ",bootable");
strcat(partitions_list, ";");
}
return 0;
}
/*
* read partition info into disk_partitions list where
* it can be printed or modified
*/
static int get_gpt_info(struct blk_desc *dev_desc)
{
/* start partition numbering at 1, as U-Boot does */
int valid_parts = 0, p, ret;
struct disk_partition info;
struct disk_part *new_disk_part;
/*
* Always re-read partition info from device, in case
* it has changed
*/
INIT_LIST_HEAD(&disk_partitions);
for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
ret = part_get_info(dev_desc, p, &info);
if (ret)
continue;
/* Add 1 here because counter is zero-based but p1 is
the first partition */
new_disk_part = allocate_disk_part(&info, valid_parts+1);
if (IS_ERR(new_disk_part))
goto out;
list_add_tail(&new_disk_part->list, &disk_partitions);
valid_parts++;
}
if (valid_parts == 0) {
printf("** No valid partitions found **\n");
goto out;
}
return valid_parts;
out:
if (valid_parts >= 1)
del_gpt_info();
return -ENODEV;
}
/* a wrapper to test get_gpt_info */
static int do_get_gpt_info(struct blk_desc *dev_desc, char * const namestr)
{
int numparts;
numparts = get_gpt_info(dev_desc);
if (numparts > 0) {
if (namestr) {
char disk_guid[UUID_STR_LEN + 1];
char *partitions_list;
int partlistlen;
int ret = -1;
ret = get_disk_guid(dev_desc, disk_guid);
if (ret < 0)
return ret;
partlistlen = calc_parts_list_len(numparts);
partitions_list = malloc(partlistlen);
if (!partitions_list) {
del_gpt_info();
return -ENOMEM;
}
memset(partitions_list, '\0', partlistlen);
ret = create_gpt_partitions_list(numparts, disk_guid,
partitions_list);
if (ret < 0)
printf("Error: Could not create partition list string!\n");
else
env_set(namestr, partitions_list);
free(partitions_list);
} else {
print_gpt_info();
}
del_gpt_info();
return 0;
}
return numparts;
}
#endif
/**
* set_gpt_info(): Fill partition information from string
* function allocates memory, remember to free!
*
* @param dev_desc - pointer block device descriptor
* @param str_part - pointer to string with partition information
* @param str_disk_guid - pointer to pointer to allocated string with disk guid
* @param partitions - pointer to pointer to allocated partitions array
* @param parts_count - number of partitions
*
* Return: - zero on success, otherwise error
*
*/
static int set_gpt_info(struct blk_desc *dev_desc,
const char *str_part,
char **str_disk_guid,
struct disk_partition **partitions,
u8 *parts_count)
{
char *tok, *str, *s;
int i;
char *val, *p;
int p_count;
struct disk_partition *parts;
int errno = 0;
uint64_t size_ll, start_ll;
lbaint_t offset = 0;
int max_str_part = calc_parts_list_len(MAX_SEARCH_PARTITIONS);
debug("%s: lba num: 0x%x %d\n", __func__,
(unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba);
if (str_part == NULL)
return -1;
str = strdup(str_part);
if (str == NULL)
return -ENOMEM;
/* extract disk guid */
s = str;
val = extract_val(str, "uuid_disk");
if (!val) {
#ifdef CONFIG_RANDOM_UUID
*str_disk_guid = malloc(UUID_STR_LEN + 1);
if (*str_disk_guid == NULL)
return -ENOMEM;
gen_rand_uuid_str(*str_disk_guid, UUID_STR_FORMAT_STD);
#else
free(str);
return -2;
#endif
} else {
val = strsep(&val, ";");
if (extract_env(val, &p))
p = val;
*str_disk_guid = strdup(p);
free(val);
/* Move s to first partition */
strsep(&s, ";");
}
if (s == NULL) {
printf("Error: is the partitions string NULL-terminated?\n");
return -EINVAL;
}
if (strnlen(s, max_str_part) == 0)
return -3;
i = strnlen(s, max_str_part) - 1;
if (s[i] == ';')
s[i] = '\0';
/* calculate expected number of partitions */
p_count = 1;
p = s;
while (*p) {
if (*p++ == ';')
p_count++;
}
/* allocate memory for partitions */
parts = calloc(sizeof(struct disk_partition), p_count);
if (parts == NULL)
return -ENOMEM;
/* retrieve partitions data from string */
for (i = 0; i < p_count; i++) {
tok = strsep(&s, ";");
if (tok == NULL)
break;
/* uuid */
val = extract_val(tok, "uuid");
if (!val) {
/* 'uuid' is optional if random uuid's are enabled */
#ifdef CONFIG_RANDOM_UUID
gen_rand_uuid_str(parts[i].uuid, UUID_STR_FORMAT_STD);
#else
errno = -4;
goto err;
#endif
} else {
if (extract_env(val, &p))
p = val;
if (strnlen(p, max_str_part) >= sizeof(parts[i].uuid)) {
printf("Wrong uuid format for partition %d\n", i);
errno = -4;
goto err;
}
strncpy((char *)parts[i].uuid, p, max_str_part);
free(val);
}
#ifdef CONFIG_PARTITION_TYPE_GUID
/* guid */
val = extract_val(tok, "type");
if (val) {
/* 'type' is optional */
if (extract_env(val, &p))
p = val;
if (strnlen(p, max_str_part) >= sizeof(parts[i].type_guid)) {
printf("Wrong type guid format for partition %d\n",
i);
errno = -4;
goto err;
}
strncpy((char *)parts[i].type_guid, p, max_str_part);
free(val);
}
#endif
/* name */
val = extract_val(tok, "name");
if (!val) { /* name is mandatory */
errno = -4;
goto err;
}
if (extract_env(val, &p))
p = val;
if (strnlen(p, max_str_part) >= sizeof(parts[i].name)) {
errno = -4;
goto err;
}
strncpy((char *)parts[i].name, p, max_str_part);
free(val);
/* size */
val = extract_val(tok, "size");
if (!val) { /* 'size' is mandatory */
errno = -4;
goto err;
}
if (extract_env(val, &p))
p = val;
if ((strcmp(p, "-") == 0)) {
/* Let part efi module to auto extend the size */
parts[i].size = 0;
} else {
size_ll = ustrtoull(p, &p, 0);
parts[i].size = lldiv(size_ll, dev_desc->blksz);
}
free(val);
/* start address */
val = extract_val(tok, "start");
if (val) { /* start address is optional */
if (extract_env(val, &p))
p = val;
start_ll = ustrtoull(p, &p, 0);
parts[i].start = lldiv(start_ll, dev_desc->blksz);
free(val);
}
offset += parts[i].size + parts[i].start;
/* bootable */
if (found_key(tok, "bootable"))
parts[i].bootable = PART_BOOTABLE;
}
*parts_count = p_count;
*partitions = parts;
free(str);
return 0;
err:
free(str);
free(*str_disk_guid);
free(parts);
return errno;
}
static int gpt_repair(struct blk_desc *blk_dev_desc)
{
int ret = 0;
ret = gpt_repair_headers(blk_dev_desc);
return ret;
}
static int gpt_default(struct blk_desc *blk_dev_desc, const char *str_part)
{
int ret;
char *str_disk_guid;
u8 part_count = 0;
struct disk_partition *partitions = NULL;
/* 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\n");
if (ret == -2)
printf("Missing disk guid\n");
if ((ret == -3) || (ret == -4))
printf("Partition list incomplete\n");
return -1;
}
/* save partitions layout to disk */
ret = gpt_restore(blk_dev_desc, str_disk_guid, partitions, part_count);
free(str_disk_guid);
free(partitions);
return ret;
}
static int gpt_verify(struct blk_desc *blk_dev_desc, const char *str_part)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1,
blk_dev_desc->blksz);
struct disk_partition *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;
}
/**
* gpt_enumerate() - Enumerate partition names into environment variable.
*
* Enumerate partition names. Partition names are stored in gpt_partition_list
* environment variable. Each partition name is delimited by space.
*
* @desc: block device descriptor
*
* @Return: '0' on success and -ve error on failure
*/
static int gpt_enumerate(struct blk_desc *desc)
{
struct part_driver *first_drv, *part_drv;
int str_len = 0, tmp_len;
char part_list[2048];
int n_drvs;
char *ptr;
part_list[0] = 0;
n_drvs = part_driver_get_count();
if (!n_drvs) {
printf("Failed to get partition driver count\n");
return -ENOENT;
}
first_drv = part_driver_get_first();
for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) {
struct disk_partition pinfo;
int ret;
int i;
if (part_drv->test(desc))
continue;
for (i = 1; i < part_drv->max_entries; i++) {
ret = part_drv->get_info(desc, i, &pinfo);
if (ret)
continue;
ptr = &part_list[str_len];
tmp_len = strlen((const char *)pinfo.name);
str_len += tmp_len;
/* +1 for space */
str_len++;
if (str_len > sizeof(part_list)) {
printf("Error insufficient memory\n");
return -ENOMEM;
}
strcpy(ptr, (const char *)pinfo.name);
/* One byte for space(" ") delimiter */
ptr[tmp_len] = ' ';
}
if (*part_list)
part_list[strlen(part_list) - 1] = 0;
break;
}
debug("setenv gpt_partition_list %s\n", part_list);
return env_set("gpt_partition_list", part_list);
}
/**
* gpt_setenv_part_variables() - setup partition environmental variables
*
* Setup the gpt_partition_name, gpt_partition_entry, gpt_partition_addr
* and gpt_partition_size, gpt_partition_bootable environment variables.
*
* @pinfo: pointer to disk partition
* @i: partition entry
*
* @Return: '0' on success and -ENOENT on failure
*/
static int gpt_setenv_part_variables(struct disk_partition *pinfo, int i)
{
int ret;
ret = env_set_hex("gpt_partition_addr", pinfo->start);
if (ret)
goto fail;
ret = env_set_hex("gpt_partition_size", pinfo->size);
if (ret)
goto fail;
ret = env_set_hex("gpt_partition_entry", i);
if (ret)
goto fail;
ret = env_set("gpt_partition_name", (const char *)pinfo->name);
if (ret)
goto fail;
ret = env_set_ulong("gpt_partition_bootable", !!(pinfo->bootable & PART_BOOTABLE));
if (ret)
goto fail;
return 0;
fail:
return -ENOENT;
}
/**
* gpt_setenv() - Dynamically setup environment variables.
*
* Dynamically setup environment variables for name, index, offset and size
* for partition in GPT table after running "gpt setenv" for a partition name.
*
* @desc: block device descriptor
* @name: partition name
*
* @Return: '0' on success and -ve err on failure
*/
static int gpt_setenv(struct blk_desc *desc, const char *name)
{
struct part_driver *first_drv, *part_drv;
int n_drvs;
int ret = -1;
n_drvs = part_driver_get_count();
if (!n_drvs) {
printf("Failed to get partition driver count\n");
goto fail;
}
first_drv = part_driver_get_first();
for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) {
struct disk_partition pinfo;
int i;
for (i = 1; i < part_drv->max_entries; i++) {
ret = part_drv->get_info(desc, i, &pinfo);
if (ret)
continue;
if (!strcmp(name, (const char *)pinfo.name)) {
/* match found, setup environment variables */
ret = gpt_setenv_part_variables(&pinfo, i);
if (ret)
goto fail;
return 0;
}
}
}
fail:
return ret;
}
static int do_disk_guid(struct blk_desc *dev_desc, char * const namestr)
{
int ret;
char disk_guid[UUID_STR_LEN + 1];
ret = get_disk_guid(dev_desc, disk_guid);
if (ret < 0)
return CMD_RET_FAILURE;
if (namestr)
env_set(namestr, disk_guid);
else
printf("%s\n", disk_guid);
return ret;
}
#ifdef CONFIG_CMD_GPT_RENAME
static int do_rename_gpt_parts(struct blk_desc *dev_desc, char *subcomm,
char *name1, char *name2)
{
struct list_head *pos;
struct disk_part *curr;
struct disk_partition *new_partitions = NULL;
char disk_guid[UUID_STR_LEN + 1];
char *partitions_list, *str_disk_guid = NULL;
u8 part_count = 0;
int partlistlen, ret, numparts = 0, partnum, i = 1, ctr1 = 0, ctr2 = 0;
if (!subcomm || !name1 || !name2 ||
(strcmp(subcomm, "swap") && strcmp(subcomm, "rename") &&
strcmp(subcomm, "transpose")))
return -EINVAL;
ret = get_disk_guid(dev_desc, disk_guid);
if (ret < 0)
return ret;
/*
* Allocates disk_partitions, requiring matching call to del_gpt_info()
* if successful.
*/
numparts = get_gpt_info(dev_desc);
if (numparts <= 0)
return numparts ? numparts : -ENODEV;
partlistlen = calc_parts_list_len(numparts);
partitions_list = malloc(partlistlen);
if (!partitions_list) {
del_gpt_info();
return -ENOMEM;
}
memset(partitions_list, '\0', partlistlen);
ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list);
if (ret < 0) {
free(partitions_list);
return ret;
}
/*
* Uncomment the following line to print a string that 'gpt write'
* or 'gpt verify' will accept as input.
*/
debug("OLD partitions_list is %s with %u chars\n", partitions_list,
(unsigned)strlen(partitions_list));
/* set_gpt_info allocates new_partitions and str_disk_guid */
ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid,
&new_partitions, &part_count);
if (ret < 0)
goto out;
if (!strcmp(subcomm, "swap")) {
if ((strlen(name1) > PART_NAME_LEN) || (strlen(name2) > PART_NAME_LEN)) {
printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN);
ret = -EINVAL;
goto out;
}
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
if (!strcmp((char *)curr->gpt_part_info.name, name1)) {
strcpy((char *)curr->gpt_part_info.name, name2);
ctr1++;
} else if (!strcmp((char *)curr->gpt_part_info.name, name2)) {
strcpy((char *)curr->gpt_part_info.name, name1);
ctr2++;
}
}
if ((ctr1 + ctr2 < 2) || (ctr1 != ctr2)) {
printf("Cannot swap partition names except in pairs.\n");
ret = -EINVAL;
goto out;
}
} else if (!strcmp(subcomm, "transpose")) {
int idx1, idx2;
struct disk_partition* first = NULL;
struct disk_partition* second= NULL;
struct disk_partition tmp_part;
idx1 = simple_strtoul(name1, NULL, 10);
idx2 = simple_strtoul(name2, NULL, 10);
if (idx1 == idx2) {
printf("Cannot swap partition with itself\n");
ret = -EINVAL;
goto out;
}
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
if (curr->partnum == idx1)
first = &curr->gpt_part_info;
else if (curr->partnum == idx2)
second = &curr->gpt_part_info;
}
if (!first) {
printf("Illegal partition number %s\n", name1);
ret = -EINVAL;
goto out;
}
if (!second) {
printf("Illegal partition number %s\n", name2);
ret = -EINVAL;
goto out;
}
tmp_part = *first;
*first = *second;
*second = tmp_part;
} else { /* rename */
if (strlen(name2) > PART_NAME_LEN) {
printf("Names longer than %d characters are truncated.\n", PART_NAME_LEN);
ret = -EINVAL;
goto out;
}
partnum = (int)simple_strtol(name1, NULL, 10);
if ((partnum < 0) || (partnum > numparts)) {
printf("Illegal partition number %s\n", name1);
ret = -EINVAL;
goto out;
}
ret = part_get_info(dev_desc, partnum, new_partitions);
if (ret < 0)
goto out;
/* U-Boot partition numbering starts at 1 */
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
if (i == partnum) {
strcpy((char *)curr->gpt_part_info.name, name2);
break;
}
i++;
}
}
ret = create_gpt_partitions_list(numparts, disk_guid, partitions_list);
if (ret < 0)
goto out;
debug("NEW partitions_list is %s with %u chars\n", partitions_list,
(unsigned)strlen(partitions_list));
ret = set_gpt_info(dev_desc, partitions_list, &str_disk_guid,
&new_partitions, &part_count);
/*
* Even though valid pointers are here passed into set_gpt_info(),
* it mallocs again, and there's no way to tell which failed.
*/
if (ret < 0)
goto out;
debug("Writing new partition table\n");
ret = gpt_restore(dev_desc, disk_guid, new_partitions, numparts);
if (ret < 0) {
printf("Writing new partition table failed\n");
goto out;
}
debug("Reading back new partition table\n");
/*
* Empty the existing disk_partitions list, as otherwise the memory in
* the original list is unreachable.
*/
del_gpt_info();
numparts = get_gpt_info(dev_desc);
if (numparts <= 0) {
ret = numparts ? numparts : -ENODEV;
goto out;
}
printf("new partition table with %d partitions is:\n", numparts);
print_gpt_info();
out:
del_gpt_info();
#ifdef CONFIG_RANDOM_UUID
free(str_disk_guid);
#endif
free(new_partitions);
free(partitions_list);
return ret;
}
/**
* gpt_set_bootable() - Set bootable flags for partitions
*
* Sets the bootable flag for any partition names in the comma separated list of
* partition names. Any partitions not in the list have their bootable flag
* cleared
*
* @desc: block device descriptor
* @name: Comma separated list of partition names
*
* @Return: '0' on success and -ve error on failure
*/
static int gpt_set_bootable(struct blk_desc *blk_dev_desc, char *const part_list)
{
char *name;
char disk_guid[UUID_STR_LEN + 1];
struct list_head *pos;
struct disk_part *curr;
struct disk_partition *partitions = NULL;
int part_count = 0;
int ret = get_disk_guid(blk_dev_desc, disk_guid);
if (ret < 0)
return ret;
ret = get_gpt_info(blk_dev_desc);
if (ret <= 0)
goto out;
part_count = ret;
partitions = malloc(sizeof(*partitions) * part_count);
if (!partitions) {
ret = -ENOMEM;
goto out;
}
/* Copy partitions and clear bootable flag */
part_count = 0;
list_for_each(pos, &disk_partitions) {
curr = list_entry(pos, struct disk_part, list);
partitions[part_count] = curr->gpt_part_info;
partitions[part_count].bootable &= ~PART_BOOTABLE;
part_count++;
}
name = strtok(part_list, ",");
while (name) {
bool found = false;
for (int i = 0; i < part_count; i++) {
if (strcmp((char *)partitions[i].name, name) == 0) {
partitions[i].bootable |= PART_BOOTABLE;
found = true;
}
}
if (!found) {
printf("Warning: No partition matching '%s' found\n",
name);
}
name = strtok(NULL, ",");
}
ret = gpt_restore(blk_dev_desc, disk_guid, partitions, part_count);
out:
del_gpt_info();
if (partitions)
free(partitions);
return ret;
}
#endif
/**
* do_gpt(): Perform GPT operations
*
* @param cmdtp - command name
* @param flag
* @param argc
* @param argv
*
* Return: zero on success; otherwise error
*/
static int do_gpt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
int ret = CMD_RET_SUCCESS;
int dev = 0;
char *ep;
struct blk_desc *blk_dev_desc = NULL;
#ifndef CONFIG_CMD_GPT_RENAME
if (argc < 4 || argc > 5)
#else
if (argc < 4 || argc > 6)
#endif
return CMD_RET_USAGE;
dev = (int)dectoul(argv[3], &ep);
if (!ep || ep[0] != '\0') {
printf("'%s' is not a number\n", argv[3]);
return CMD_RET_USAGE;
}
blk_dev_desc = blk_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], "repair") == 0) {
printf("Repairing GPT: ");
ret = gpt_repair(blk_dev_desc);
} else if ((strcmp(argv[1], "write") == 0) && (argc == 5)) {
printf("Writing GPT: ");
ret = gpt_default(blk_dev_desc, argv[4]);
} else if ((strcmp(argv[1], "verify") == 0)) {
ret = gpt_verify(blk_dev_desc, argv[4]);
printf("Verify GPT: ");
} else if ((strcmp(argv[1], "setenv") == 0)) {
ret = gpt_setenv(blk_dev_desc, argv[4]);
} else if ((strcmp(argv[1], "enumerate") == 0)) {
ret = gpt_enumerate(blk_dev_desc);
} else if (strcmp(argv[1], "guid") == 0) {
ret = do_disk_guid(blk_dev_desc, argv[4]);
#ifdef CONFIG_CMD_GPT_RENAME
} else if (strcmp(argv[1], "read") == 0) {
ret = do_get_gpt_info(blk_dev_desc, (argc == 5) ? argv[4] : NULL);
} else if ((strcmp(argv[1], "swap") == 0) ||
(strcmp(argv[1], "rename") == 0) ||
(strcmp(argv[1], "transpose") == 0)) {
ret = do_rename_gpt_parts(blk_dev_desc, argv[1], argv[4], argv[5]);
} else if ((strcmp(argv[1], "set-bootable") == 0)) {
ret = gpt_set_bootable(blk_dev_desc, argv[4]);
#endif
} else {
return CMD_RET_USAGE;
}
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,
"GUID Partition Table",
"<command> <interface> <dev> <partitions_list>\n"
" - GUID partition table restoration and validity check\n"
" Restore or verify GPT information on a device connected\n"
" to interface\n"
" Example usage:\n"
" gpt repair mmc 0\n"
" - repair the GPT on the device\n"
" gpt write mmc 0 $partitions\n"
" - write the GPT to device\n"
" gpt verify mmc 0 $partitions\n"
" - verify the GPT on device against $partitions\n"
" gpt setenv mmc 0 $name\n"
" - setup environment variables for partition $name:\n"
" gpt_partition_addr, gpt_partition_size,\n"
" gpt_partition_name, gpt_partition_entry,\n"
" gpt_partition_bootable\n"
" gpt enumerate mmc 0\n"
" - store list of partitions to gpt_partition_list environment variable\n"
" gpt guid <interface> <dev>\n"
" - print disk GUID\n"
" gpt guid <interface> <dev> <varname>\n"
" - set environment variable to disk GUID\n"
" Example usage:\n"
" gpt guid mmc 0\n"
" gpt guid mmc 0 varname\n"
#ifdef CONFIG_CMD_GPT_RENAME
"gpt partition renaming commands:\n"
" gpt read <interface> <dev> [<varname>]\n"
" - read GPT into a data structure for manipulation\n"
" - read GPT partitions into environment variable\n"
" gpt swap <interface> <dev> <name1> <name2>\n"
" - change all partitions named name1 to name2\n"
" and vice-versa\n"
" gpt transpose <interface> <dev> <part1> <part2>\n"
" - Swap the order of the entries for part1 and part2 in the partition table\n"
" gpt rename <interface> <dev> <part> <name>\n"
" - rename the specified partition\n"
" gpt set-bootable <interface> <dev> <list>\n"
" - make partition names in list bootable\n"
" Example usage:\n"
" gpt swap mmc 0 foo bar\n"
" gpt rename mmc 0 3 foo\n"
" gpt set-bootable mmc 0 boot_a,boot_b\n"
" gpt transpose mmc 0 1 2\n"
#endif
);
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