--- /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