+++ /dev/null
-/*
- efivars_proc.[ch] - Manipulates EFI variables as exported in /proc/efi/vars
-
- Copyright (C) 2001,2003 Dell Computer Corporation <Matt_Domsch@dell.com>
-
- This program 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 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <stdint.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <linux/sockios.h>
-#include <net/if.h>
-#include <pci/pci.h>
-#include <linux/ethtool.h>
-#include "efi.h"
-#include "efichar.h"
-#include "scsi_ioctls.h"
-#include "disk.h"
-#include "efibootmgr.h"
-#include "efivars_procfs.h"
-#include "efivars_sysfs.h"
-#include "list.h"
-
-static struct efivar_kernel_calls *fs_kernel_calls;
-
-EFI_DEVICE_PATH *
-load_option_path(EFI_LOAD_OPTION *option)
-{
- char *p = (char *) option;
- return (EFI_DEVICE_PATH *)
- (p + sizeof(uint32_t) /* Attributes */
- + sizeof(uint16_t) /* FilePathListLength*/
- + efichar_strsize(option->description)); /* Description */
-}
-
-char *
-efi_guid_unparse(efi_guid_t *guid, char *out)
-{
- sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
- guid->b[3], guid->b[2], guid->b[1], guid->b[0],
- guid->b[5], guid->b[4], guid->b[7], guid->b[6],
- guid->b[8], guid->b[9], guid->b[10], guid->b[11],
- guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
- return out;
-}
-
-void
-set_fs_kernel_calls()
-{
- char name[PATH_MAX];
- DIR *dir;
- snprintf(name, PATH_MAX, "%s", SYSFS_DIR_EFI_VARS);
- dir = opendir(name);
- if (dir) {
- closedir(dir);
- fs_kernel_calls = &sysfs_kernel_calls;
- return;
- }
-
- snprintf(name, PATH_MAX, "%s", PROCFS_DIR_EFI_VARS);
- dir = opendir(name);
- if (dir) {
- closedir(dir);
- fs_kernel_calls = &procfs_kernel_calls;
- return;
- }
- fprintf(stderr, "Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables.\n");
- fprintf(stderr, "Try 'modprobe efivars' as root.\n");
- exit(1);
-}
-
-
-
-static efi_status_t
-write_variable_to_file(efi_variable_t *var)
-{
- int fd, byteswritten;
- if (!var || !opts.testfile) return EFI_INVALID_PARAMETER;
-
- printf("Test mode: Writing to %s\n", opts.testfile);
- fd = creat(opts.testfile, S_IRWXU);
- if (fd == -1) {
- perror("Couldn't write to testfile");
- return EFI_INVALID_PARAMETER;
- }
-
- byteswritten = write(fd, var, sizeof(*var));
- if (byteswritten == -1) {
- perror("Writing to testfile");
-
- }
- close(fd);
- return EFI_SUCCESS;
-}
-
-efi_status_t
-read_variable(const char *name, efi_variable_t *var)
-{
- if (!name || !var) return EFI_INVALID_PARAMETER;
- return fs_kernel_calls->read(name, var);
-}
-
-efi_status_t
-create_variable(efi_variable_t *var)
-{
- if (!var) return EFI_INVALID_PARAMETER;
- if (opts.testfile) return write_variable_to_file(var);
- return fs_kernel_calls->create(var);
-}
-
-efi_status_t
-delete_variable(efi_variable_t *var)
-{
- if (!var) return EFI_INVALID_PARAMETER;
- if (opts.testfile) return write_variable_to_file(var);
- return fs_kernel_calls->delete(var);
-}
-
-
-efi_status_t
-edit_variable(efi_variable_t *var)
-{
- char name[PATH_MAX];
- if (!var) return EFI_INVALID_PARAMETER;
- if (opts.testfile) return write_variable_to_file(var);
-
- variable_to_name(var, name);
- return fs_kernel_calls->edit(name, var);
-}
-
-efi_status_t
-create_or_edit_variable(efi_variable_t *var)
-{
- efi_variable_t testvar;
- char name[PATH_MAX];
-
- memcpy(&testvar, var, sizeof(*var));
- variable_to_name(var, name);
-
- if (read_variable(name, &testvar) == EFI_SUCCESS)
- return edit_variable(var);
- else
- return create_variable(var);
-}
-
-static int
-select_boot_var_names(const struct dirent *d)
-{
- if (!strncmp(d->d_name, "Boot", 4) &&
- isxdigit(d->d_name[4]) && isxdigit(d->d_name[5]) &&
- isxdigit(d->d_name[6]) && isxdigit(d->d_name[7]) &&
- d->d_name[8] == '-')
- return 1;
- return 0;
-}
-
-int
-read_boot_var_names(struct dirent ***namelist)
-{
- if (!fs_kernel_calls || !namelist) return -1;
- return scandir(fs_kernel_calls->path,
- namelist, select_boot_var_names,
- alphasort);
-}
-
-
-static int
-get_edd_version()
-{
- efi_status_t status;
- efi_variable_t var;
- efi_guid_t guid = BLKX_UNKNOWN_GUID;
- char name[80], text_guid[40];
- ACPI_DEVICE_PATH *path = (ACPI_DEVICE_PATH *)&(var.Data);
- int rc = 0;
-
- /* Allow global user option override */
-
- switch (opts.edd_version)
- {
- case 0: /* No EDD information */
- return 0;
- break;
- case 1: /* EDD 1.0 */
- return 1;
- break;
- case 3: /* EDD 3.0 */
- return 3;
- break;
- default:
- break;
- }
-
-
- memset(&var, 0, sizeof(efi_variable_t));
- efi_guid_unparse(&guid, text_guid);
- sprintf(name, "blk0-%s", text_guid);
-
- status = read_variable(name, &var);
- if (status != EFI_SUCCESS) {
- return 0;
- }
- if (path->type == 2 && path->subtype == 1) rc = 3;
- else rc = 1;
- return rc;
-}
-
-/*
- EFI_DEVICE_PATH, 0x01 (Hardware), 0x04 (Vendor), length 0x0018
- This needs to know what EFI device has the boot device.
-*/
-static uint16_t
-make_edd10_device_path(void *dest, uint32_t hardware_device)
-{
- VENDOR_DEVICE_PATH *hw;
- char buffer[EDD10_HARDWARE_VENDOR_PATH_LENGTH];
- efi_guid_t guid = EDD10_HARDWARE_VENDOR_PATH_GUID;
- uint32_t *data;
- memset(buffer, 0, sizeof(buffer));
- hw = (VENDOR_DEVICE_PATH *)buffer;
- data = (uint32_t *)hw->data;
- hw->type = 0x01; /* Hardware Device Path */
- hw->subtype = 0x04; /* Vendor */
- hw->length = EDD10_HARDWARE_VENDOR_PATH_LENGTH;
- memcpy(&(hw->vendor_guid), &guid, sizeof(guid));
- *data = hardware_device;
- memcpy(dest, buffer, hw->length);
- return hw->length;
-}
-
-static uint16_t
-make_end_device_path(void *dest)
-{
- END_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 0x7F; /* End of Hardware Device Path */
- p.subtype = 0xFF; /* End Entire Device Path */
- p.length = sizeof(p);
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-static uint16_t
-make_acpi_device_path(void *dest, uint32_t _HID, uint32_t _UID)
-{
- ACPI_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 2;
- p.subtype = 1;
- p.length = sizeof(p);
- p._HID = _HID;
- p._UID = _UID;
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-static uint16_t
-make_mac_addr_device_path(void *dest, char *mac, uint8_t iftype)
-{
-
- int i;
- MAC_ADDR_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 3;
- p.subtype = 11;
- p.length = sizeof(p);
- for (i=0; i < 14; i++) {
- p.macaddr[i] = mac[i];
- }
- p.iftype = iftype;
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-struct device
-{
- struct pci_dev *pci_dev;
- struct list_head node;
-};
-
-static struct device *
-is_parent_bridge(struct pci_dev *p, unsigned int target_bus)
-{
- struct device *d;
- unsigned int primary, secondary;
-
- if ( (pci_read_word(p, PCI_HEADER_TYPE) & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
- return NULL;
-
- primary=pci_read_byte(p, PCI_PRIMARY_BUS);
- secondary=pci_read_byte(p, PCI_SECONDARY_BUS);
-
-
- if (secondary != target_bus)
- return NULL;
-
- d = malloc(sizeof(struct device));
- if (!d)
- return NULL;
- memset(d, 0, sizeof(*d));
- INIT_LIST_HEAD(&d->node);
-
- d->pci_dev = p;
-
- return d;
-}
-
-static struct device *
-find_parent(struct pci_access *pacc, unsigned int target_bus)
-{
- struct device *dev;
- struct pci_dev *p;
-
- for (p=pacc->devices; p; p=p->next) {
- dev = is_parent_bridge(p, target_bus);
- if (dev)
- return dev;
- }
- return NULL;
-}
-
-static uint16_t
-make_one_pci_device_path(void *dest, uint8_t device, uint8_t function)
-{
- PCI_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 1;
- p.subtype = 1;
- p.length = sizeof(p);
- p.device = device;
- p.function = function;
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-static uint16_t
-make_pci_device_path(void *dest, uint8_t bus, uint8_t device, uint8_t function)
-{
- struct device *dev;
- struct pci_access *pacc;
- struct list_head *pos, *n;
- LIST_HEAD(pci_parent_list);
- char *p = dest;
-
- pacc = pci_alloc();
- if (!pacc)
- return 0;
-
- pci_init(pacc);
- pci_scan_bus(pacc);
-
- do {
- dev = find_parent(pacc, bus);
- if (dev) {
- list_add(&pci_parent_list, &dev->node);
- bus = dev->pci_dev->bus;
- }
- } while (dev && bus);
-
-
- list_for_each_safe(pos, n, &pci_parent_list) {
- dev = list_entry(pos, struct device, node);
- p += make_one_pci_device_path(p,
- dev->pci_dev->dev,
- dev->pci_dev->func);
- list_del(&dev->node);
- free(dev);
- }
-
- p += make_one_pci_device_path(p, device, function);
-
- pci_cleanup(pacc);
-
- return ((void *)p - dest);
-}
-
-static uint16_t
-make_scsi_device_path(void *dest, uint16_t id, uint16_t lun)
-{
- SCSI_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 3;
- p.subtype = 2;
- p.length = sizeof(p);
- p.id = id;
- p.lun = lun;
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-static uint16_t
-make_harddrive_device_path(void *dest, uint32_t num, uint64_t start, uint64_t size,
- uint8_t *signature,
- uint8_t mbr_type, uint8_t signature_type)
-{
- HARDDRIVE_DEVICE_PATH p;
- memset(&p, 0, sizeof(p));
- p.type = 4;
- p.subtype = 1;
- p.length = sizeof(p);
- p.part_num = num;
- p.start = start;
- p.size = size;
- if (signature) memcpy(p.signature, signature, 16);
- p.mbr_type = mbr_type;
- p.signature_type = signature_type;
- memcpy(dest, &p, p.length);
- return p.length;
-}
-
-static uint16_t
-make_file_path_device_path(void *dest, efi_char16_t *name)
-{
- FILE_PATH_DEVICE_PATH *p;
- char buffer[1024];
- int namelen = efichar_strlen(name, -1);
- int namesize = efichar_strsize(name);
-
- memset(buffer, 0, sizeof(buffer));
- p = (FILE_PATH_DEVICE_PATH *)buffer;
- p->type = 4;
- p->subtype = 4;
- p->length = 4 + namesize;
- efichar_strncpy(p->path_name,
- name, namelen);
-
- memcpy(dest, buffer, p->length);
- return p->length;
-
-}
-
-
-
-static long
-make_edd30_device_path(int fd, void *buffer)
-{
- int rc=0;
- unsigned char bus=0, device=0, function=0;
- Scsi_Idlun idlun;
- unsigned char host=0, channel=0, id=0, lun=0;
- char *p = buffer;
-
-
- rc = disk_get_pci(fd, &bus, &device, &function);
- if (rc) return 0;
-
- memset(&idlun, 0, sizeof(idlun));
- rc = get_scsi_idlun(fd, &idlun);
- if (rc) return 0;
- idlun_to_components(&idlun, &host, &channel, &id, &lun);
-
- p += make_acpi_device_path (p, EISAID_PNP0A03, bus);
- p += make_pci_device_path (p, bus, device, function);
- p += make_scsi_device_path (p, id, lun);
- return ((void *)p - buffer);
-}
-
-/**
- * make_disk_load_option()
- * @disk disk
- *
- * Returns 0 on error, length of load option created on success.
- */
-char *make_disk_load_option(char *p, char *disk)
-{
- int disk_fd=0;
- char buffer[80];
- char signature[16];
- int rc, edd_version=0;
- uint8_t mbr_type=0, signature_type=0;
- uint64_t start=0, size=0;
- efi_char16_t os_loader_path[40];
-
- memset(signature, 0, sizeof(signature));
-
- disk_fd = open(opts.disk, O_RDWR);
- if (disk_fd == -1) {
- sprintf(buffer, "Could not open disk %s", opts.disk);
- perror(buffer);
- return 0;
- }
-
- if (opts.edd_version) {
- edd_version = get_edd_version();
-
- if (edd_version == 3) {
- p += make_edd30_device_path(disk_fd, p);
- }
- else if (edd_version == 1) {
- p += make_edd10_device_path(p, opts.edd10_devicenum);
- }
- }
-
- rc = disk_get_partition_info (disk_fd, opts.part,
- &start, &size, signature,
- &mbr_type, &signature_type);
-
- close(disk_fd);
-
- if (rc) {
- fprintf(stderr, "Error: no partition information on disk %s.\n"
- " Cowardly refusing to create a boot option.\n",
- opts.disk);
- return 0;
- }
-
- p += make_harddrive_device_path (p, opts.part,
- start, size,
- signature,
- mbr_type, signature_type);
-
- efichar_from_char(os_loader_path, opts.loader, sizeof(os_loader_path));
- p += make_file_path_device_path (p, os_loader_path);
- p += make_end_device_path (p);
-
- return(p);
-}
-
-/**
- * make_net_load_option()
- * @data - load option returned
- *
- * Returns NULL on error, or p advanced by length of load option
- * created on success.
- */
-char *make_net_load_option(char *p, char *iface)
-{
- /* copied pretty much verbatim from the ethtool source */
- int fd = 0, err;
- int bus, slot, func;
- struct ifreq ifr;
- struct ethtool_drvinfo drvinfo;
-
- memset(&ifr, 0, sizeof(ifr));
- strcpy(ifr.ifr_name, iface);
- drvinfo.cmd = ETHTOOL_GDRVINFO;
- ifr.ifr_data = (caddr_t)&drvinfo;
- /* Open control socket */
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd < 0) {
- perror("Cannot get control socket");
- goto out;
- }
- err = ioctl(fd, SIOCETHTOOL, &ifr);
- if (err < 0) {
- perror("Cannot get driver information");
- goto out;
- }
-
- /* The domain part was added in 2.6 kernels. Test for that first. */
- err = sscanf(drvinfo.bus_info, "%*x:%2x:%2x.%x", &bus, &slot, &func);
- if (err != 3) {
- err = sscanf(drvinfo.bus_info, "%2x:%2x.%x", &bus, &slot, &func);
- if (err != 3) {
- perror("Couldn't parse device location string.");
- goto out;
- }
- }
-
- err = ioctl(fd, SIOCGIFHWADDR, &ifr);
- if (err < 0) {
- perror("Cannot get hardware address.");
- goto out;
- }
-
- p += make_acpi_device_path(p, opts.acpi_hid, opts.acpi_uid);
- p += make_pci_device_path(p, bus, (uint8_t)slot, (uint8_t)func);
- p += make_mac_addr_device_path(p, ifr.ifr_ifru.ifru_hwaddr.sa_data, 0);
- p += make_end_device_path (p);
- return(p);
- out:
- return NULL;
-}
-
-/**
- * make_linux_load_option()
- * @data - load option returned
- *
- * Returns 0 on error, length of load option created on success.
- */
-static unsigned long
-make_linux_load_option(void *data)
-{
- EFI_LOAD_OPTION *load_option = data;
- char *p = data, *q;
- efi_char16_t description[64];
- unsigned long datasize=0;
-
- /* Write Attributes */
- if (opts.active) load_option->attributes = LOAD_OPTION_ACTIVE;
- else load_option->attributes = 0;
-
- p += sizeof(uint32_t);
- /* skip writing file_path_list_length */
- p += sizeof(uint16_t);
- /* Write description. This is the text that appears on the screen for the load option. */
- memset(description, 0, sizeof(description));
- efichar_from_char(description, opts.label, sizeof(description));
- efichar_strncpy(load_option->description, description, sizeof(description));
- p += efichar_strsize(load_option->description);
-
- q = p;
-
- if (opts.iface) {
- p = (char *)make_net_load_option(p, opts.iface);
- }
- else {
- p = (char *)make_disk_load_option(p, opts.iface);
- }
- if (p == NULL)
- return 0;
-
- load_option->file_path_list_length = p - q;
-
- datasize = (uint8_t *)p - (uint8_t *)data;
- return datasize;
-}
-
-/*
- * append_extra_args()
- * appends all arguments from argv[] not snarfed by getopt
- * as one long string onto data, up to maxchars. allow for nulls
- */
-
-static unsigned long
-append_extra_args_ascii(void *data, unsigned long maxchars)
-{
- char *p = data;
- int i, appended=0;
- unsigned long usedchars=0;
- if (!data) return 0;
-
-
- for (i=opts.optind; i < opts.argc && usedchars < maxchars; i++) {
- p = strncpy(p, opts.argv[i], maxchars-usedchars-1);
- p += strlen(p);
- appended=1;
-
- usedchars = p - (char *)data;
-
- /* Put a space between args */
- if (i < (opts.argc-1)) {
-
- p = strncpy(p, " ", maxchars-usedchars-1);
- p += strlen(p);
- usedchars = p - (char *)data;
- }
-
- }
- /* Remember the NULL */
- if (appended) return strlen(data) + 1;
- return 0;
-}
-
-static unsigned long
-append_extra_args_unicode(void *data, unsigned long maxchars)
-{
- char *p = data;
- int i, appended=0;
- unsigned long usedchars=0;
- if (!data) return 0;
-
-
- for (i=opts.optind; i < opts.argc && usedchars < maxchars; i++) {
- p += efichar_from_char((efi_char16_t *)p, opts.argv[i],
- maxchars-usedchars);
- usedchars = efichar_strsize(data) - sizeof(efi_char16_t);
- appended=1;
-
- /* Put a space between args */
- if (i < (opts.argc-1)) {
- p += efichar_from_char((efi_char16_t *)p, " ",
- maxchars-usedchars);
- usedchars = efichar_strsize(data) -
- sizeof(efi_char16_t);
- }
- }
-
- if (appended) return efichar_strsize( (efi_char16_t *)data );
- return 0;
-}
-
-
-static unsigned long
-append_extra_args(void *data, unsigned long maxchars)
-{
- if (opts.unicode)
- return append_extra_args_unicode(data, maxchars);
- else
- return append_extra_args_ascii(data, maxchars);
-}
-
-
-
-int
-make_linux_efi_variable(efi_variable_t *var,
- unsigned int free_number)
-{
- efi_guid_t guid = EFI_GLOBAL_VARIABLE;
- char buffer[16];
- unsigned char *optional_data=NULL;
- unsigned long load_option_size = 0, opt_data_size=0;
-
- memset(buffer, 0, sizeof(buffer));
-
- /* VariableName needs to be BootXXXX */
- sprintf(buffer, "Boot%04X", free_number);
-
- efichar_from_char(var->VariableName, buffer, 1024);
-
- memcpy(&(var->VendorGuid), &guid, sizeof(guid));
- var->Attributes =
- EFI_VARIABLE_NON_VOLATILE |
- EFI_VARIABLE_BOOTSERVICE_ACCESS |
- EFI_VARIABLE_RUNTIME_ACCESS;
-
- /* Set Data[] and DataSize */
-
- load_option_size = make_linux_load_option(var->Data);
-
- if (!load_option_size) return 0;
-
- /* Set OptionalData (passed as binary to the called app) */
- optional_data = var->Data + load_option_size;
- opt_data_size = append_extra_args(optional_data,
- sizeof(var->Data) - load_option_size);
- var->DataSize = load_option_size + opt_data_size;
- return var->DataSize;
-}
-
-
-int
-variable_to_name(efi_variable_t *var, char *name)
-{
- char *p = name;
- efichar_to_char(p, var->VariableName, PATH_MAX);
- p += strlen(p);
- p += sprintf(p, "-");
- efi_guid_unparse(&var->VendorGuid, p);
- return strlen(name);
-}
projects / debian / efibootmgr / blobdiff