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elilo/glue_netfs.c

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/*
* Copyright (C) 2001-2003 Hewlett-Packard Co.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
* Copyright (C) 2006-2009 Intel Corporation
* Contributed by Fenghua Yu <fenghua.yu@intel.com>
* Contributed by Bibo Mao <bibo.mao@intel.com>
* Contributed by Chandramouli Narayanan <mouli@linux.intel.com>
*
* This file is part of the ELILO, the EFI Linux boot loader.
*
* ELILO is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* ELILO 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with ELILO; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Please check out the elilo.txt for complete documentation on how
* to use this program.
*/
#include <efi.h>
#include <efilib.h>
#include "glue_netfs.h"
#include "fs/netfs.h"
#include "strops.h"
#include "elilo.h"
#include "vars.h"
/*
* disable this if you only want the default config file (elilo.conf)
* and not the ip-address based first file attempt
*/
static INTN glue(fileops_t *this, VOID *intf);
/* object exported to fileops */
fileops_fs_t netfs_glue = { NETFS_PROTOCOL , glue, netfs_install, netfs_uninstall};
#define NETFS_DEFAULT_KERNEL L"vmlinux"
#define NETFS_DEFAULT_CONFIG L"elilo.conf"
#define NETFS_DEFAULT_SERVER_TYPE EFI_PXE_BASE_CODE_BOOT_TYPE_REDHAT_BOOT
static CHAR16 netfs_default_path[FILENAME_MAXLEN];
/*
* Pxe Discovery protocol layers
* Layer 0 is used to download the boot loader
*/
#define NETFS_CONFIG_LAYER 1
#define NETFS_KERNEL_LAYER 2
static CHAR16 *hexa=L"0123456789ABCDEF";
static VOID
convert_mac2hex(UINT8 *hw_addr,INTN l, CHAR16 *str)
{
UINTN i;
for (i=0 ; i < l; i++) {
str[3*i] = hexa[(hw_addr[i] & 0xf0)>>4];
str[3*i+1] = hexa[hw_addr[i] & 0x0f];
str[3*i+2] = ':';
}
str[3*l-1]='\0';
}
static VOID
convert_ip2hex(UINT8 *ip, INTN l, CHAR16 *str)
{
UINTN i;
for(i=0; i < l; i++) {
str[2*i] = hexa[(ip[i] & 0xf0)>>4];
str[2*i+1] = hexa[ip[i] & 0x0f];
}
}
static VOID
convert_ip2decstr(UINT8 *ip, INTN l, CHAR16 *str)
{
UINTN i, j;
UINTN v, val;
for(i=0, j=0; i < l; i++) {
val = ip[i];
v = val / 100;
if (v) {
str[j++] = L'0'+v;
}
val = val % 100;
v = val / 10;
if (v || ip[i] >= 100) {
str[j++] = L'0'+v;
}
v = val % 10;
str[j++] = L'0'+v;
if (i < l-1) str[j++] = L'.';
}
str[j] = CHAR_NULL;
}
static int
netfs_set_default_path(netfs_interface_t *netfs, netfs_info_t *info)
{
INTN len;
StrnCpy(netfs_default_path, info->bootfile, FILENAME_MAXLEN);
len = StrLen(netfs_default_path) - 1;
while (len >= 0) {
if (netfs_default_path[len] == CHAR_SLASH || netfs_default_path[len] == CHAR_BACKSLASH) break;
len--;
}
netfs_default_path[len+1] = CHAR_NULL;
DBG_PRT((L"netfs_default_path=%s\n", netfs_default_path));
return EFI_SUCCESS;
}
static EFI_STATUS
netfs_setdefaults(VOID *intf, config_file_t *config, CHAR16 *kname, UINTN maxlen, CHAR16 *devpath)
{
netfs_interface_t *netfs = (netfs_interface_t *)intf;
netfs_info_t info;
EFI_STATUS status;
UINT8 *ipaddr;
UINTN m;
CHAR16 ip_var[64], str[64];
UINT8 *ip;
if (config == NULL || kname == NULL || maxlen < 1) return EFI_INVALID_PARAMETER;
netfs->netfs_getinfo(netfs, &info);
m = info.using_ipv6 ? 16 : 4;
ipaddr = info.using_ipv6 ? info.cln_ipaddr.v6.Addr: info.cln_ipaddr.v4.Addr;
convert_ip2decstr(ipaddr, m, ip_var);
set_var(VAR_NETFS_IPADDR, ip_var);
ip = info.using_ipv6 ? info.netmask.v6.Addr: info.netmask.v4.Addr;
convert_ip2decstr(ip, m, str);
set_var(VAR_NETFS_NETMASK, str);
ip = info.using_ipv6 ? info.gw_ipaddr.v6.Addr: info.gw_ipaddr.v4.Addr;
convert_ip2decstr(ip, m, str);
set_var(VAR_NETFS_GATEWAY, str);
set_var(VAR_NETFS_HOSTNAME, info.hostname);
set_var(VAR_NETFS_DOMAINAME, info.domainame);
if (info.using_pxe) {
DBG_PRT((L"netfs_setdefaults: using_pxe"));
status = netfs->netfs_query_layer(netfs, 0, NETFS_CONFIG_LAYER, maxlen, config[0].fname);
if (EFI_ERROR(status)) {
StrnCpy(config[0].fname, NETFS_DEFAULT_CONFIG, maxlen-1);
config[0].fname[maxlen-1] = CHAR_NULL;
}
status = netfs->netfs_query_layer(netfs, 0, NETFS_KERNEL_LAYER, maxlen, kname);
if (EFI_ERROR(status)) {
StrnCpy(kname, NETFS_DEFAULT_KERNEL, maxlen-1);
kname[maxlen-1] = CHAR_NULL;
}
} else {
#ifdef ENABLE_MACHINE_SPECIFIC_NETCONFIG
# if defined(CONFIG_ia64)
# define CONFIG_ARCH_EXTENSION L"-ia64.conf\0"
# define EXTENSION_LENGTH 11
# elif defined (CONFIG_ia32)
# define CONFIG_ARCH_EXTENSION L"-ia32.conf\0"
# define EXTENSION_LENGTH 11
# elif defined (CONFIG_x86_64)
# define CONFIG_ARCH_EXTENSION L"-x86_64.conf\0"
# define EXTENSION_LENGTH 13
# else
# error "You need to specfy your default arch config file"
# endif
# define CONFIG_EXTENSION L".conf\0"
DBG_PRT((L"netfs_setdefaults: machine specific (!using_pxe)"));
/*
* will try machine/subnet specific files first.
* the filenames are constructed based on the IP(v4) address
*/
convert_ip2hex(ipaddr, m, str);
StrnCpy(config[0].fname, str, maxlen-1);
StrnCpy(config[0].fname+8, CONFIG_EXTENSION, 6);
StrnCpy(config[1].fname, str, maxlen-1);
StrnCpy(config[1].fname+6, CONFIG_ARCH_EXTENSION, EXTENSION_LENGTH);
StrnCpy(config[2].fname, str, maxlen-1);
StrnCpy(config[2].fname+6, CONFIG_EXTENSION, 6);
StrnCpy(config[3].fname, str, maxlen-1);
StrnCpy(config[3].fname+4, CONFIG_ARCH_EXTENSION, EXTENSION_LENGTH);
StrnCpy(config[4].fname, str, maxlen-1);
StrnCpy(config[4].fname+4, CONFIG_EXTENSION, 6);
StrnCpy(config[5].fname, str, maxlen-1);
StrnCpy(config[5].fname+2, CONFIG_ARCH_EXTENSION, EXTENSION_LENGTH);
StrnCpy(config[6].fname, str, maxlen-1);
StrnCpy(config[6].fname+2, CONFIG_EXTENSION, 6);
/* use the MAC address as a possible file name as well */
convert_mac2hex(info.hw_addr,6,str);
StrnCpy(config[7].fname, str, maxlen-1);
StrnCpy(config[7].fname+17, CONFIG_EXTENSION, 6);
#else
StrnCpy(config[0].fname, NETFS_DEFAULT_CONFIG, maxlen-1);
config[0].fname[maxlen-1] = CHAR_NULL;
#endif
StrnCpy(kname, NETFS_DEFAULT_KERNEL, maxlen-1);
kname[maxlen-1] = CHAR_NULL;
/*
* extract bootloader path prefix to be used for
* the config file (and possibly the other files we
* need to download)
*/
netfs_set_default_path(netfs, &info);
}
return EFI_SUCCESS;
}
static EFI_STATUS
netfs_getdefault_path(CHAR16 *path, UINTN maxlen)
{
if (maxlen <= StrLen(netfs_default_path)) return EFI_BUFFER_TOO_SMALL;
StrCpy(path, netfs_default_path);
return EFI_SUCCESS;
}
static EFI_STATUS
glue_open(VOID *intf, CHAR16 *name, fops_fd_t *fd)
{
netfs_interface_t *netfs = (netfs_interface_t *)intf;
CHAR16 fullname[FILENAME_MAXLEN];
if (name[0] != CHAR_SLASH && name[0] != CHAR_BACKSLASH && netfs_default_path[0] != CHAR_NULL) {
if (StrLen(netfs_default_path) + StrLen(name) + 1 >= FILENAME_MAXLEN)
return EFI_INVALID_PARAMETER;
StrCpy(fullname, netfs_default_path);
StrCat(fullname, name);
name = fullname;
}
return netfs->netfs_open(intf, name, fd);
}
static INTN
glue(fileops_t *fp, VOID *intf)
{
netfs_interface_t *netfs = (netfs_interface_t *)intf;
/* record underlying interface */
fp->intf = intf;
fp->open = glue_open;
fp->read = (fops_read_t)netfs->netfs_read;
fp->close = (fops_close_t)netfs->netfs_close;
fp->infosize = (fops_infosize_t)netfs->netfs_infosize;
fp->seek = (fops_seek_t)netfs->netfs_seek;
fp->setdefaults = (fops_setdefaults_t)netfs_setdefaults;
fp->getdefault_path = (fops_getdefault_path_t)netfs_getdefault_path;
fp->intf = intf;
/* fill out the name of the underlying file system */
netfs->netfs_name(netfs, fp->name, FILEOPS_NAME_MAXLEN);
return 0;
}
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