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/*
* Copyright (C) 2013 Collabora Ltd
*
* Based on ot-bootloader-syslinux.c by Colin Walters <walters@verbum.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2 of the licence or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library. If not, see <https://www.gnu.org/licenses/>.
*
* Author: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
*/
#include "config.h"
#include "ostree-sysroot-private.h"
#include "ostree-bootloader-uboot.h"
#include "otutil.h"
#include <string.h>
static const char uboot_config_path[] = "boot/loader/uEnv.txt";
struct _OstreeBootloaderUboot
{
GObject parent_instance;
OstreeSysroot *sysroot;
};
typedef GObjectClass OstreeBootloaderUbootClass;
static void _ostree_bootloader_uboot_bootloader_iface_init (OstreeBootloaderInterface *iface);
G_DEFINE_TYPE_WITH_CODE (OstreeBootloaderUboot, _ostree_bootloader_uboot, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (OSTREE_TYPE_BOOTLOADER, _ostree_bootloader_uboot_bootloader_iface_init));
static gboolean
_ostree_bootloader_uboot_query (OstreeBootloader *bootloader,
gboolean *out_is_active,
GCancellable *cancellable,
GError **error)
{
OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (bootloader);
struct stat stbuf;
if (!glnx_fstatat_allow_noent (self->sysroot->sysroot_fd, uboot_config_path, &stbuf, AT_SYMLINK_NOFOLLOW, error))
return FALSE;
*out_is_active = (errno == 0);
return TRUE;
}
static const char *
_ostree_bootloader_uboot_get_name (OstreeBootloader *bootloader)
{
return "U-Boot";
}
/* Append system's uEnv.txt, if it exists in $deployment/usr/lib/ostree-boot/ */
static gboolean
append_system_uenv (OstreeBootloaderUboot *self,
const char *bootargs,
GPtrArray *new_lines,
GCancellable *cancellable,
GError **error)
{
glnx_autofd int uenv_fd = -1;
g_autoptr(OstreeKernelArgs) kargs = NULL;
const char *uenv_path = NULL;
const char *ostree_arg = NULL;
kargs = ostree_kernel_args_from_string (bootargs);
ostree_arg = ostree_kernel_args_get_last_value (kargs, "ostree");
if (!ostree_arg)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"No ostree= kernel argument found in boot loader configuration file");
return FALSE;
}
ostree_arg += 1;
uenv_path = glnx_strjoina (ostree_arg, "/usr/lib/ostree-boot/uEnv.txt");
if (!ot_openat_ignore_enoent (self->sysroot->sysroot_fd, uenv_path, &uenv_fd, error))
return FALSE;
if (uenv_fd != -1)
{
char *uenv = glnx_fd_readall_utf8 (uenv_fd, NULL, cancellable, error);
if (!uenv)
{
g_prefix_error (error, "Reading %s: ", uenv_path);
return FALSE;
}
g_ptr_array_add (new_lines, uenv);
}
return TRUE;
}
static gboolean
create_config_from_boot_loader_entries (OstreeBootloaderUboot *self,
int bootversion,
GPtrArray *new_lines,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GPtrArray) boot_loader_configs = NULL;
OstreeBootconfigParser *config;
const char *val;
if (!_ostree_sysroot_read_boot_loader_configs (self->sysroot, bootversion, &boot_loader_configs,
cancellable, error))
return FALSE;
for (int i = 0; i < boot_loader_configs->len; i++)
{
g_autofree char *index_suffix = NULL;
if (i == 0)
index_suffix = g_strdup ("");
else
index_suffix = g_strdup_printf ("%d", i+1);
config = boot_loader_configs->pdata[i];
val = ostree_bootconfig_parser_get (config, "linux");
if (!val)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"No \"linux\" key in bootloader config");
return FALSE;
}
g_ptr_array_add (new_lines, g_strdup_printf ("kernel_image%s=/boot%s", index_suffix, val));
val = ostree_bootconfig_parser_get (config, "initrd");
if (val)
g_ptr_array_add (new_lines, g_strdup_printf ("ramdisk_image%s=/boot%s", index_suffix, val));
val = ostree_bootconfig_parser_get (config, "devicetree");
if (val)
g_ptr_array_add (new_lines, g_strdup_printf ("fdt_file%s=/boot%s", index_suffix, val));
val = ostree_bootconfig_parser_get (config, "fdtdir");
if (val)
g_ptr_array_add (new_lines, g_strdup_printf ("fdtdir%s=/boot%s", index_suffix, val));
val = ostree_bootconfig_parser_get (config, "options");
if (val)
{
g_ptr_array_add (new_lines, g_strdup_printf ("bootargs%s=%s", index_suffix, val));
if (i == 0)
if (!append_system_uenv (self, val, new_lines, cancellable, error))
return FALSE;
}
}
return TRUE;
}
static gboolean
_ostree_bootloader_uboot_write_config (OstreeBootloader *bootloader,
int bootversion,
GPtrArray *new_deployments,
GCancellable *cancellable,
GError **error)
{
OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (bootloader);
/* This should follow the symbolic link to the current bootversion. */
g_autofree char *config_contents =
glnx_file_get_contents_utf8_at (self->sysroot->sysroot_fd, uboot_config_path, NULL,
cancellable, error);
if (!config_contents)
return FALSE;
g_autoptr(GPtrArray) new_lines = g_ptr_array_new_with_free_func (g_free);
if (!create_config_from_boot_loader_entries (self, bootversion, new_lines,
cancellable, error))
return FALSE;
g_autofree char *new_config_path = g_strdup_printf ("boot/loader.%d/uEnv.txt", bootversion);
g_autofree char *new_config_contents = _ostree_sysroot_join_lines (new_lines);
if (!glnx_file_replace_contents_at (self->sysroot->sysroot_fd, new_config_path,
(guint8*)new_config_contents, strlen (new_config_contents),
GLNX_FILE_REPLACE_DATASYNC_NEW,
cancellable, error))
return FALSE;
return TRUE;
}
static void
_ostree_bootloader_uboot_finalize (GObject *object)
{
OstreeBootloaderUboot *self = OSTREE_BOOTLOADER_UBOOT (object);
g_clear_object (&self->sysroot);
G_OBJECT_CLASS (_ostree_bootloader_uboot_parent_class)->finalize (object);
}
void
_ostree_bootloader_uboot_init (OstreeBootloaderUboot *self)
{
}
static void
_ostree_bootloader_uboot_bootloader_iface_init (OstreeBootloaderInterface *iface)
{
iface->query = _ostree_bootloader_uboot_query;
iface->get_name = _ostree_bootloader_uboot_get_name;
iface->write_config = _ostree_bootloader_uboot_write_config;
}
void
_ostree_bootloader_uboot_class_init (OstreeBootloaderUbootClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = _ostree_bootloader_uboot_finalize;
}
OstreeBootloaderUboot *
_ostree_bootloader_uboot_new (OstreeSysroot *sysroot)
{
OstreeBootloaderUboot *self = g_object_new (OSTREE_TYPE_BOOTLOADER_UBOOT, NULL);
self->sysroot = g_object_ref (sysroot);
return self;
}
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