2020-01-10 16:03:56 +00:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/*
|
|
|
|
* Boot config tool for initrd image
|
|
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
2020-11-20 02:29:13 +00:00
|
|
|
#include <endian.h>
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/bootconfig.h>
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
static int xbc_show_value(struct xbc_node *node, bool semicolon)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
2020-08-10 08:34:51 +00:00
|
|
|
const char *val, *eol;
|
2020-06-16 10:14:17 +00:00
|
|
|
char q;
|
2020-01-10 16:03:56 +00:00
|
|
|
int i = 0;
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
eol = semicolon ? ";\n" : "\n";
|
2020-01-10 16:03:56 +00:00
|
|
|
xbc_array_for_each_value(node, val) {
|
2020-06-16 10:14:17 +00:00
|
|
|
if (strchr(val, '"'))
|
|
|
|
q = '\'';
|
|
|
|
else
|
|
|
|
q = '"';
|
2021-06-02 08:18:58 +00:00
|
|
|
printf("%c%s%c%s", q, val, q, xbc_node_is_array(node) ? ", " : eol);
|
2020-01-10 16:03:56 +00:00
|
|
|
i++;
|
|
|
|
}
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void xbc_show_compact_tree(void)
|
|
|
|
{
|
2021-06-02 08:19:07 +00:00
|
|
|
struct xbc_node *node, *cnode = NULL, *vnode;
|
2020-01-10 16:03:56 +00:00
|
|
|
int depth = 0, i;
|
|
|
|
|
|
|
|
node = xbc_root_node();
|
|
|
|
while (node && xbc_node_is_key(node)) {
|
|
|
|
for (i = 0; i < depth; i++)
|
|
|
|
printf("\t");
|
2021-06-02 08:19:07 +00:00
|
|
|
if (!cnode)
|
|
|
|
cnode = xbc_node_get_child(node);
|
2020-01-10 16:03:56 +00:00
|
|
|
while (cnode && xbc_node_is_key(cnode) && !cnode->next) {
|
2021-06-02 08:19:07 +00:00
|
|
|
vnode = xbc_node_get_child(cnode);
|
|
|
|
/*
|
|
|
|
* If @cnode has value and subkeys, this
|
|
|
|
* should show it as below.
|
|
|
|
*
|
|
|
|
* key(@node) {
|
|
|
|
* key(@cnode) = value;
|
|
|
|
* key(@cnode) {
|
|
|
|
* subkeys;
|
|
|
|
* }
|
|
|
|
* }
|
|
|
|
*/
|
|
|
|
if (vnode && xbc_node_is_value(vnode) && vnode->next)
|
|
|
|
break;
|
2020-01-10 16:03:56 +00:00
|
|
|
printf("%s.", xbc_node_get_data(node));
|
|
|
|
node = cnode;
|
2021-06-02 08:19:07 +00:00
|
|
|
cnode = vnode;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
if (cnode && xbc_node_is_key(cnode)) {
|
|
|
|
printf("%s {\n", xbc_node_get_data(node));
|
|
|
|
depth++;
|
|
|
|
node = cnode;
|
2021-06-02 08:19:07 +00:00
|
|
|
cnode = NULL;
|
2020-01-10 16:03:56 +00:00
|
|
|
continue;
|
|
|
|
} else if (cnode && xbc_node_is_value(cnode)) {
|
|
|
|
printf("%s = ", xbc_node_get_data(node));
|
2020-08-10 08:34:51 +00:00
|
|
|
xbc_show_value(cnode, true);
|
2021-06-02 08:19:07 +00:00
|
|
|
/*
|
|
|
|
* If @node has value and subkeys, continue
|
|
|
|
* looping on subkeys with same node.
|
|
|
|
*/
|
|
|
|
if (cnode->next) {
|
|
|
|
cnode = xbc_node_get_next(cnode);
|
|
|
|
continue;
|
|
|
|
}
|
2020-01-10 16:03:56 +00:00
|
|
|
} else {
|
|
|
|
printf("%s;\n", xbc_node_get_data(node));
|
|
|
|
}
|
2021-06-02 08:19:07 +00:00
|
|
|
cnode = NULL;
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
if (node->next) {
|
|
|
|
node = xbc_node_get_next(node);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
while (!node->next) {
|
|
|
|
node = xbc_node_get_parent(node);
|
|
|
|
if (!node)
|
|
|
|
return;
|
|
|
|
if (!xbc_node_get_child(node)->next)
|
|
|
|
continue;
|
2021-06-02 08:19:07 +00:00
|
|
|
if (depth) {
|
|
|
|
depth--;
|
|
|
|
for (i = 0; i < depth; i++)
|
|
|
|
printf("\t");
|
|
|
|
printf("}\n");
|
|
|
|
}
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
node = xbc_node_get_next(node);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
static void xbc_show_list(void)
|
|
|
|
{
|
|
|
|
char key[XBC_KEYLEN_MAX];
|
|
|
|
struct xbc_node *leaf;
|
|
|
|
const char *val;
|
2021-09-04 15:54:38 +00:00
|
|
|
int ret;
|
2020-08-10 08:34:51 +00:00
|
|
|
|
|
|
|
xbc_for_each_key_value(leaf, val) {
|
2021-09-04 15:54:38 +00:00
|
|
|
ret = xbc_node_compose_key(leaf, key, XBC_KEYLEN_MAX);
|
|
|
|
if (ret < 0) {
|
2021-06-02 08:19:07 +00:00
|
|
|
fprintf(stderr, "Failed to compose key %d\n", ret);
|
2020-08-10 08:34:51 +00:00
|
|
|
break;
|
2021-06-02 08:19:07 +00:00
|
|
|
}
|
2020-08-10 08:34:51 +00:00
|
|
|
printf("%s = ", key);
|
|
|
|
if (!val || val[0] == '\0') {
|
|
|
|
printf("\"\"\n");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
xbc_show_value(xbc_node_get_child(leaf), false);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-01-10 16:03:56 +00:00
|
|
|
#define PAGE_SIZE 4096
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int load_xbc_fd(int fd, char **buf, int size)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
*buf = malloc(size + 1);
|
|
|
|
if (!*buf)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
ret = read(fd, *buf, size);
|
|
|
|
if (ret < 0)
|
|
|
|
return -errno;
|
|
|
|
(*buf)[size] = '\0';
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the read size or -errno */
|
2020-08-10 08:35:01 +00:00
|
|
|
static int load_xbc_file(const char *path, char **buf)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
struct stat stat;
|
|
|
|
int fd, ret;
|
|
|
|
|
|
|
|
fd = open(path, O_RDONLY);
|
|
|
|
if (fd < 0)
|
|
|
|
return -errno;
|
|
|
|
ret = fstat(fd, &stat);
|
|
|
|
if (ret < 0)
|
|
|
|
return -errno;
|
|
|
|
|
|
|
|
ret = load_xbc_fd(fd, buf, stat.st_size);
|
|
|
|
|
|
|
|
close(fd);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-11-19 05:53:22 +00:00
|
|
|
static int pr_errno(const char *msg, int err)
|
|
|
|
{
|
|
|
|
pr_err("%s: %d\n", msg, err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int load_xbc_from_initrd(int fd, char **buf)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
struct stat stat;
|
|
|
|
int ret;
|
|
|
|
u32 size = 0, csum = 0, rcsum;
|
2020-02-20 12:18:42 +00:00
|
|
|
char magic[BOOTCONFIG_MAGIC_LEN];
|
2020-03-03 11:24:50 +00:00
|
|
|
const char *msg;
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
ret = fstat(fd, &stat);
|
|
|
|
if (ret < 0)
|
|
|
|
return -errno;
|
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
if (stat.st_size < 8 + BOOTCONFIG_MAGIC_LEN)
|
2020-01-10 16:03:56 +00:00
|
|
|
return 0;
|
|
|
|
|
2020-11-19 05:53:22 +00:00
|
|
|
if (lseek(fd, -BOOTCONFIG_MAGIC_LEN, SEEK_END) < 0)
|
|
|
|
return pr_errno("Failed to lseek for magic", -errno);
|
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
if (read(fd, magic, BOOTCONFIG_MAGIC_LEN) < 0)
|
2020-11-19 05:53:22 +00:00
|
|
|
return pr_errno("Failed to read", -errno);
|
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
/* Check the bootconfig magic bytes */
|
|
|
|
if (memcmp(magic, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN) != 0)
|
|
|
|
return 0;
|
|
|
|
|
2020-11-19 05:53:22 +00:00
|
|
|
if (lseek(fd, -(8 + BOOTCONFIG_MAGIC_LEN), SEEK_END) < 0)
|
|
|
|
return pr_errno("Failed to lseek for size", -errno);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
if (read(fd, &size, sizeof(u32)) < 0)
|
2020-11-19 05:53:22 +00:00
|
|
|
return pr_errno("Failed to read size", -errno);
|
2020-11-20 02:29:13 +00:00
|
|
|
size = le32toh(size);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
if (read(fd, &csum, sizeof(u32)) < 0)
|
2020-11-19 05:53:22 +00:00
|
|
|
return pr_errno("Failed to read checksum", -errno);
|
2020-11-20 02:29:13 +00:00
|
|
|
csum = le32toh(csum);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
/* Wrong size error */
|
|
|
|
if (stat.st_size < size + 8 + BOOTCONFIG_MAGIC_LEN) {
|
|
|
|
pr_err("bootconfig size is too big\n");
|
|
|
|
return -E2BIG;
|
|
|
|
}
|
2020-01-10 16:03:56 +00:00
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
if (lseek(fd, stat.st_size - (size + 8 + BOOTCONFIG_MAGIC_LEN),
|
2020-11-19 05:53:22 +00:00
|
|
|
SEEK_SET) < 0)
|
|
|
|
return pr_errno("Failed to lseek", -errno);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
ret = load_xbc_fd(fd, buf, size);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
2020-02-20 12:18:42 +00:00
|
|
|
/* Wrong Checksum */
|
2021-06-02 08:19:34 +00:00
|
|
|
rcsum = xbc_calc_checksum(*buf, size);
|
2020-01-10 16:03:56 +00:00
|
|
|
if (csum != rcsum) {
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("checksum error: %d != %d\n", csum, rcsum);
|
2020-02-20 12:18:42 +00:00
|
|
|
return -EINVAL;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
|
2021-09-16 06:23:20 +00:00
|
|
|
ret = xbc_init(*buf, size, &msg, NULL);
|
2020-02-20 12:18:42 +00:00
|
|
|
/* Wrong data */
|
2020-03-03 11:24:50 +00:00
|
|
|
if (ret < 0) {
|
|
|
|
pr_err("parse error: %s.\n", msg);
|
2020-02-20 12:18:42 +00:00
|
|
|
return ret;
|
2020-03-03 11:24:50 +00:00
|
|
|
}
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
return size;
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:34:41 +00:00
|
|
|
static void show_xbc_error(const char *data, const char *msg, int pos)
|
|
|
|
{
|
|
|
|
int lin = 1, col, i;
|
|
|
|
|
|
|
|
if (pos < 0) {
|
|
|
|
pr_err("Error: %s.\n", msg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Note that pos starts from 0 but lin and col should start from 1. */
|
|
|
|
col = pos + 1;
|
|
|
|
for (i = 0; i < pos; i++) {
|
|
|
|
if (data[i] == '\n') {
|
|
|
|
lin++;
|
|
|
|
col = pos - i;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pr_err("Parse Error: %s at %d:%d\n", msg, lin, col);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static int init_xbc_with_error(char *buf, int len)
|
|
|
|
{
|
|
|
|
char *copy = strdup(buf);
|
|
|
|
const char *msg;
|
|
|
|
int ret, pos;
|
|
|
|
|
|
|
|
if (!copy)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2021-09-16 06:23:20 +00:00
|
|
|
ret = xbc_init(buf, len, &msg, &pos);
|
2020-08-10 08:34:41 +00:00
|
|
|
if (ret < 0)
|
|
|
|
show_xbc_error(copy, msg, pos);
|
|
|
|
free(copy);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int show_xbc(const char *path, bool list)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
int ret, fd;
|
|
|
|
char *buf = NULL;
|
2020-08-10 08:34:41 +00:00
|
|
|
struct stat st;
|
|
|
|
|
|
|
|
ret = stat(path, &st);
|
|
|
|
if (ret < 0) {
|
2020-11-19 05:53:22 +00:00
|
|
|
ret = -errno;
|
|
|
|
pr_err("Failed to stat %s: %d\n", path, ret);
|
|
|
|
return ret;
|
2020-08-10 08:34:41 +00:00
|
|
|
}
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
fd = open(path, O_RDONLY);
|
|
|
|
if (fd < 0) {
|
2020-11-19 05:53:22 +00:00
|
|
|
ret = -errno;
|
|
|
|
pr_err("Failed to open initrd %s: %d\n", path, ret);
|
|
|
|
return ret;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = load_xbc_from_initrd(fd, &buf);
|
2020-08-10 08:34:41 +00:00
|
|
|
close(fd);
|
2020-06-16 10:14:25 +00:00
|
|
|
if (ret < 0) {
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Failed to load a boot config from initrd: %d\n", ret);
|
2020-06-16 10:14:25 +00:00
|
|
|
goto out;
|
|
|
|
}
|
2020-08-10 08:34:41 +00:00
|
|
|
/* Assume a bootconfig file if it is enough small */
|
|
|
|
if (ret == 0 && st.st_size <= XBC_DATA_MAX) {
|
|
|
|
ret = load_xbc_file(path, &buf);
|
|
|
|
if (ret < 0) {
|
|
|
|
pr_err("Failed to load a boot config: %d\n", ret);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (init_xbc_with_error(buf, ret) < 0)
|
|
|
|
goto out;
|
|
|
|
}
|
2020-08-10 08:34:51 +00:00
|
|
|
if (list)
|
|
|
|
xbc_show_list();
|
|
|
|
else
|
|
|
|
xbc_show_compact_tree();
|
2020-06-16 10:14:25 +00:00
|
|
|
ret = 0;
|
|
|
|
out:
|
2020-01-10 16:03:56 +00:00
|
|
|
free(buf);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int delete_xbc(const char *path)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
struct stat stat;
|
|
|
|
int ret = 0, fd, size;
|
|
|
|
char *buf = NULL;
|
|
|
|
|
|
|
|
fd = open(path, O_RDWR);
|
|
|
|
if (fd < 0) {
|
2020-11-19 05:53:22 +00:00
|
|
|
ret = -errno;
|
|
|
|
pr_err("Failed to open initrd %s: %d\n", path, ret);
|
|
|
|
return ret;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
size = load_xbc_from_initrd(fd, &buf);
|
|
|
|
if (size < 0) {
|
|
|
|
ret = size;
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Failed to load a boot config from initrd: %d\n", ret);
|
2020-01-10 16:03:56 +00:00
|
|
|
} else if (size > 0) {
|
|
|
|
ret = fstat(fd, &stat);
|
|
|
|
if (!ret)
|
2020-02-20 12:18:42 +00:00
|
|
|
ret = ftruncate(fd, stat.st_size
|
|
|
|
- size - 8 - BOOTCONFIG_MAGIC_LEN);
|
2020-01-10 16:03:56 +00:00
|
|
|
if (ret)
|
|
|
|
ret = -errno;
|
|
|
|
} /* Ignore if there is no boot config in initrd */
|
|
|
|
|
|
|
|
close(fd);
|
|
|
|
free(buf);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int apply_xbc(const char *path, const char *xbc_path)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
2020-11-19 05:53:40 +00:00
|
|
|
char *buf, *data, *p;
|
|
|
|
size_t total_size;
|
2020-11-19 05:53:31 +00:00
|
|
|
struct stat stat;
|
2020-11-19 05:53:40 +00:00
|
|
|
const char *msg;
|
2020-01-10 16:03:56 +00:00
|
|
|
u32 size, csum;
|
2020-11-19 05:53:40 +00:00
|
|
|
int pos, pad;
|
2020-01-10 16:03:56 +00:00
|
|
|
int ret, fd;
|
|
|
|
|
|
|
|
ret = load_xbc_file(xbc_path, &buf);
|
|
|
|
if (ret < 0) {
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Failed to load %s : %d\n", xbc_path, ret);
|
2020-01-10 16:03:56 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
size = strlen(buf) + 1;
|
2021-06-02 08:19:34 +00:00
|
|
|
csum = xbc_calc_checksum(buf, size);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
2020-11-19 05:53:40 +00:00
|
|
|
/* Backup the bootconfig data */
|
|
|
|
data = calloc(size + BOOTCONFIG_ALIGN +
|
|
|
|
sizeof(u32) + sizeof(u32) + BOOTCONFIG_MAGIC_LEN, 1);
|
2020-01-10 16:03:56 +00:00
|
|
|
if (!data)
|
|
|
|
return -ENOMEM;
|
2020-11-19 05:53:40 +00:00
|
|
|
memcpy(data, buf, size);
|
2020-01-10 16:03:56 +00:00
|
|
|
|
|
|
|
/* Check the data format */
|
2021-09-16 06:23:20 +00:00
|
|
|
ret = xbc_init(buf, size, &msg, &pos);
|
2020-01-10 16:03:56 +00:00
|
|
|
if (ret < 0) {
|
2020-03-03 11:24:50 +00:00
|
|
|
show_xbc_error(data, msg, pos);
|
2020-01-10 16:03:56 +00:00
|
|
|
free(data);
|
|
|
|
free(buf);
|
2020-03-03 11:24:50 +00:00
|
|
|
|
2020-01-10 16:03:56 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
printf("Apply %s to %s\n", xbc_path, path);
|
2021-09-16 06:23:29 +00:00
|
|
|
xbc_get_info(&ret, NULL);
|
2020-02-05 13:50:13 +00:00
|
|
|
printf("\tNumber of nodes: %d\n", ret);
|
2020-01-10 16:03:56 +00:00
|
|
|
printf("\tSize: %u bytes\n", (unsigned int)size);
|
|
|
|
printf("\tChecksum: %d\n", (unsigned int)csum);
|
|
|
|
|
|
|
|
/* TODO: Check the options by schema */
|
|
|
|
xbc_destroy_all();
|
|
|
|
free(buf);
|
|
|
|
|
|
|
|
/* Remove old boot config if exists */
|
|
|
|
ret = delete_xbc(path);
|
|
|
|
if (ret < 0) {
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Failed to delete previous boot config: %d\n", ret);
|
2020-05-07 09:23:36 +00:00
|
|
|
free(data);
|
2020-01-10 16:03:56 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Apply new one */
|
|
|
|
fd = open(path, O_RDWR | O_APPEND);
|
|
|
|
if (fd < 0) {
|
2020-11-19 05:53:22 +00:00
|
|
|
ret = -errno;
|
|
|
|
pr_err("Failed to open %s: %d\n", path, ret);
|
2020-05-07 09:23:36 +00:00
|
|
|
free(data);
|
2020-11-19 05:53:22 +00:00
|
|
|
return ret;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
/* TODO: Ensure the @path is initramfs/initrd image */
|
2020-11-19 05:53:31 +00:00
|
|
|
if (fstat(fd, &stat) < 0) {
|
2021-05-08 03:42:16 +00:00
|
|
|
ret = -errno;
|
2020-11-19 05:53:31 +00:00
|
|
|
pr_err("Failed to get the size of %s\n", path);
|
|
|
|
goto out;
|
|
|
|
}
|
2020-11-19 05:53:40 +00:00
|
|
|
|
|
|
|
/* To align up the total size to BOOTCONFIG_ALIGN, get padding size */
|
|
|
|
total_size = stat.st_size + size + sizeof(u32) * 2 + BOOTCONFIG_MAGIC_LEN;
|
|
|
|
pad = ((total_size + BOOTCONFIG_ALIGN - 1) & (~BOOTCONFIG_ALIGN_MASK)) - total_size;
|
|
|
|
size += pad;
|
|
|
|
|
|
|
|
/* Add a footer */
|
|
|
|
p = data + size;
|
2020-11-20 02:29:13 +00:00
|
|
|
*(u32 *)p = htole32(size);
|
2020-11-19 05:53:40 +00:00
|
|
|
p += sizeof(u32);
|
|
|
|
|
2020-11-20 02:29:13 +00:00
|
|
|
*(u32 *)p = htole32(csum);
|
2020-11-19 05:53:40 +00:00
|
|
|
p += sizeof(u32);
|
|
|
|
|
|
|
|
memcpy(p, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN);
|
|
|
|
p += BOOTCONFIG_MAGIC_LEN;
|
|
|
|
|
|
|
|
total_size = p - data;
|
|
|
|
|
|
|
|
ret = write(fd, data, total_size);
|
|
|
|
if (ret < total_size) {
|
2020-11-19 05:53:31 +00:00
|
|
|
if (ret < 0)
|
|
|
|
ret = -errno;
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Failed to apply a boot config: %d\n", ret);
|
2020-11-19 05:53:40 +00:00
|
|
|
if (ret >= 0)
|
|
|
|
goto out_rollback;
|
|
|
|
} else
|
|
|
|
ret = 0;
|
|
|
|
|
2020-05-07 09:23:36 +00:00
|
|
|
out:
|
2020-01-10 16:03:56 +00:00
|
|
|
close(fd);
|
|
|
|
free(data);
|
|
|
|
|
2020-05-07 09:23:36 +00:00
|
|
|
return ret;
|
2020-11-19 05:53:31 +00:00
|
|
|
|
|
|
|
out_rollback:
|
|
|
|
/* Map the partial write to -ENOSPC */
|
|
|
|
if (ret >= 0)
|
|
|
|
ret = -ENOSPC;
|
|
|
|
if (ftruncate(fd, stat.st_size) < 0) {
|
|
|
|
ret = -errno;
|
|
|
|
pr_err("Failed to rollback the write error: %d\n", ret);
|
|
|
|
pr_err("The initrd %s may be corrupted. Recommend to rebuild.\n", path);
|
|
|
|
}
|
|
|
|
goto out;
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|
|
|
|
|
2020-08-10 08:35:01 +00:00
|
|
|
static int usage(void)
|
2020-01-10 16:03:56 +00:00
|
|
|
{
|
|
|
|
printf("Usage: bootconfig [OPTIONS] <INITRD>\n"
|
2020-08-10 08:34:41 +00:00
|
|
|
"Or bootconfig <CONFIG>\n"
|
2020-01-10 16:03:56 +00:00
|
|
|
" Apply, delete or show boot config to initrd.\n"
|
|
|
|
" Options:\n"
|
|
|
|
" -a <config>: Apply boot config to initrd\n"
|
2020-08-10 08:34:51 +00:00
|
|
|
" -d : Delete boot config file from initrd\n"
|
|
|
|
" -l : list boot config in initrd or file\n\n"
|
2020-08-10 08:34:41 +00:00
|
|
|
" If no option is given, show the bootconfig in the given file.\n");
|
2020-01-10 16:03:56 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
|
|
{
|
|
|
|
char *path = NULL;
|
|
|
|
char *apply = NULL;
|
2020-08-10 08:34:51 +00:00
|
|
|
bool delete = false, list = false;
|
2020-01-10 16:03:56 +00:00
|
|
|
int opt;
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
while ((opt = getopt(argc, argv, "hda:l")) != -1) {
|
2020-01-10 16:03:56 +00:00
|
|
|
switch (opt) {
|
|
|
|
case 'd':
|
|
|
|
delete = true;
|
|
|
|
break;
|
|
|
|
case 'a':
|
|
|
|
apply = optarg;
|
|
|
|
break;
|
2020-08-10 08:34:51 +00:00
|
|
|
case 'l':
|
|
|
|
list = true;
|
|
|
|
break;
|
2020-01-10 16:03:56 +00:00
|
|
|
case 'h':
|
|
|
|
default:
|
|
|
|
return usage();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
if ((apply && delete) || (delete && list) || (apply && list)) {
|
|
|
|
pr_err("Error: You can give one of -a, -d or -l at once.\n");
|
2020-01-10 16:03:56 +00:00
|
|
|
return usage();
|
|
|
|
}
|
|
|
|
|
|
|
|
if (optind >= argc) {
|
2020-02-09 13:05:13 +00:00
|
|
|
pr_err("Error: No initrd is specified.\n");
|
2020-01-10 16:03:56 +00:00
|
|
|
return usage();
|
|
|
|
}
|
|
|
|
|
|
|
|
path = argv[optind];
|
|
|
|
|
|
|
|
if (apply)
|
|
|
|
return apply_xbc(path, apply);
|
|
|
|
else if (delete)
|
|
|
|
return delete_xbc(path);
|
|
|
|
|
2020-08-10 08:34:51 +00:00
|
|
|
return show_xbc(path, list);
|
2020-01-10 16:03:56 +00:00
|
|
|
}
|