364 lines
9.4 KiB
C
364 lines
9.4 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config-util.h>
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#include <config.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <dirent.h>
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#include <errno.h>
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#include <error.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#include <grub/types.h>
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# include <sys/param.h>
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# include <sys/mount.h>
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# include <sys/disk.h> /* DIOCGMEDIASIZE */
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# include <sys/param.h>
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# include <sys/sysctl.h>
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#include <libgeom.h>
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#include <grub/util/misc.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/emu/misc.h>
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#include <grub/emu/hostdisk.h>
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#include <grub/emu/getroot.h>
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#include <grub/cryptodisk.h>
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#include <sys/wait.h>
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#include <libgeom.h>
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#define LVM_DEV_MAPPER_STRING "/dev/linux_lvm/"
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static const char *
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grub_util_get_geom_abstraction (const char *dev)
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{
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char *whole;
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struct gmesh mesh;
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struct gclass *class;
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const char *name;
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int err;
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if (strncmp (dev, "/dev/", sizeof ("/dev/") - 1) != 0)
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return 0;
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name = dev + sizeof ("/dev/") - 1;
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grub_util_follow_gpart_up (name, NULL, &whole);
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grub_util_info ("following geom '%s'", name);
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err = geom_gettree (&mesh);
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if (err != 0)
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/* TRANSLATORS: geom is the name of (k)FreeBSD device framework.
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Usually left untranslated.
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*/
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grub_util_error ("%s", _("couldn't open geom"));
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LIST_FOREACH (class, &mesh.lg_class, lg_class)
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{
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struct ggeom *geom;
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LIST_FOREACH (geom, &class->lg_geom, lg_geom)
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{
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struct gprovider *provider;
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LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
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if (strcmp (provider->lg_name, name) == 0)
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return class->lg_name;
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}
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}
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return NULL;
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}
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enum grub_dev_abstraction_types
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grub_util_get_dev_abstraction_os (const char *os_dev)
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{
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const char *abstrac;
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abstrac = grub_util_get_geom_abstraction (os_dev);
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grub_util_info ("abstraction of %s is %s", os_dev, abstrac);
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if (abstrac && grub_strcasecmp (abstrac, "eli") == 0)
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return GRUB_DEV_ABSTRACTION_GELI;
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/* Check for LVM. */
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if (!strncmp (os_dev, LVM_DEV_MAPPER_STRING, sizeof(LVM_DEV_MAPPER_STRING)-1))
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return GRUB_DEV_ABSTRACTION_LVM;
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return GRUB_DEV_ABSTRACTION_NONE;
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}
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char *
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grub_util_part_to_disk (const char *os_dev, struct stat *st,
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int *is_part)
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{
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char *out, *out2;
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if (! S_ISCHR (st->st_mode))
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{
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*is_part = 0;
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return xstrdup (os_dev);
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}
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if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
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return xstrdup (os_dev);
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grub_util_follow_gpart_up (os_dev + sizeof ("/dev/") - 1, NULL, &out);
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if (grub_strcmp (os_dev + sizeof ("/dev/") - 1, out) != 0)
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*is_part = 1;
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out2 = xasprintf ("/dev/%s", out);
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free (out);
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return out2;
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}
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int
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grub_util_pull_device_os (const char *os_dev,
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enum grub_dev_abstraction_types ab)
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{
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switch (ab)
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{
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case GRUB_DEV_ABSTRACTION_GELI:
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{
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char *whole;
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struct gmesh mesh;
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struct gclass *class;
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const char *name;
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int err;
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char *lastsubdev = NULL;
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if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
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return 1;
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name = os_dev + sizeof ("/dev/") - 1;
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grub_util_follow_gpart_up (name, NULL, &whole);
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grub_util_info ("following geom '%s'", name);
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err = geom_gettree (&mesh);
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if (err != 0)
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/* TRANSLATORS: geom is the name of (k)FreeBSD device framework.
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Usually left untranslated.
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*/
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grub_util_error ("%s", _("couldn't open geom"));
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LIST_FOREACH (class, &mesh.lg_class, lg_class)
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{
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struct ggeom *geom;
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LIST_FOREACH (geom, &class->lg_geom, lg_geom)
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{
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struct gprovider *provider;
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LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
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if (strcmp (provider->lg_name, name) == 0)
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{
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struct gconsumer *consumer;
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char *fname;
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LIST_FOREACH (consumer, &geom->lg_consumer, lg_consumer)
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break;
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if (!consumer)
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grub_util_error ("%s",
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_("couldn't find geli consumer"));
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fname = xasprintf ("/dev/%s", consumer->lg_provider->lg_name);
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grub_util_info ("consumer %s", consumer->lg_provider->lg_name);
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lastsubdev = consumer->lg_provider->lg_name;
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grub_util_pull_device (fname);
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free (fname);
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}
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}
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}
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if (ab == GRUB_DEV_ABSTRACTION_GELI && lastsubdev)
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{
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char *fname = xasprintf ("/dev/%s", lastsubdev);
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char *grdev = grub_util_get_grub_dev (fname);
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free (fname);
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if (grdev)
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{
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grub_err_t gr_err;
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gr_err = grub_cryptodisk_cheat_mount (grdev, os_dev);
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if (gr_err)
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grub_util_error (_("can't mount encrypted volume `%s': %s"),
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lastsubdev, grub_errmsg);
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}
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grub_free (grdev);
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}
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}
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return 1;
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default:
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return 0;
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}
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}
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char *
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grub_util_get_grub_dev_os (const char *os_dev)
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{
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char *grub_dev = NULL;
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switch (grub_util_get_dev_abstraction (os_dev))
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{
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/* Fallback for non-devmapper build. In devmapper-builds LVM is handled
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in rub_util_get_devmapper_grub_dev and this point isn't reached.
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*/
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case GRUB_DEV_ABSTRACTION_LVM:
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{
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unsigned short len;
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grub_size_t offset = sizeof (LVM_DEV_MAPPER_STRING) - 1;
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len = strlen (os_dev) - offset + 1;
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grub_dev = xmalloc (len + sizeof ("lvm/"));
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grub_memcpy (grub_dev, "lvm/", sizeof ("lvm/") - 1);
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grub_memcpy (grub_dev + sizeof ("lvm/") - 1, os_dev + offset, len);
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}
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break;
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case GRUB_DEV_ABSTRACTION_GELI:
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{
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char *whole;
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struct gmesh mesh;
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struct gclass *class;
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const char *name;
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int err;
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if (strncmp (os_dev, "/dev/", sizeof ("/dev/") - 1) != 0)
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return 0;
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name = os_dev + sizeof ("/dev/") - 1;
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grub_util_follow_gpart_up (name, NULL, &whole);
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grub_util_info ("following geom '%s'", name);
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err = geom_gettree (&mesh);
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if (err != 0)
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/* TRANSLATORS: geom is the name of (k)FreeBSD device framework.
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Usually left untranslated.
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*/
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grub_util_error ("%s", _("couldn't open geom"));
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LIST_FOREACH (class, &mesh.lg_class, lg_class)
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{
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struct ggeom *geom;
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LIST_FOREACH (geom, &class->lg_geom, lg_geom)
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{
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struct gprovider *provider;
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LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
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if (strcmp (provider->lg_name, name) == 0)
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{
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struct gconsumer *consumer;
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char *fname;
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char *uuid;
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LIST_FOREACH (consumer, &geom->lg_consumer, lg_consumer)
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break;
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if (!consumer)
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grub_util_error ("%s",
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_("couldn't find geli consumer"));
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fname = xasprintf ("/dev/%s", consumer->lg_provider->lg_name);
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uuid = grub_util_get_geli_uuid (fname);
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if (!uuid)
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grub_util_error ("%s",
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_("couldn't retrieve geli UUID"));
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grub_dev = xasprintf ("cryptouuid/%s", uuid);
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free (fname);
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free (uuid);
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}
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}
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}
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}
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break;
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default:
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break;
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}
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return grub_dev;
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}
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/* FIXME: geom actually gives us the whole container hierarchy.
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It can be used more efficiently than this. */
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void
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grub_util_follow_gpart_up (const char *name, grub_disk_addr_t *off_out, char **name_out)
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{
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struct gmesh mesh;
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struct gclass *class;
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int err;
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struct ggeom *geom;
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grub_util_info ("following geom '%s'", name);
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err = geom_gettree (&mesh);
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if (err != 0)
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/* TRANSLATORS: geom is the name of (k)FreeBSD device framework.
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Usually left untranslated.
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*/
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grub_util_error ("%s", _("couldn't open geom"));
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LIST_FOREACH (class, &mesh.lg_class, lg_class)
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if (strcasecmp (class->lg_name, "part") == 0)
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break;
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if (!class)
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/* TRANSLATORS: geom is the name of (k)FreeBSD device framework.
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Usually left untranslated. "part" is the identifier of one of its
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classes. */
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grub_util_error ("%s", _("couldn't find geom `part' class"));
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LIST_FOREACH (geom, &class->lg_geom, lg_geom)
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{
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struct gprovider *provider;
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LIST_FOREACH (provider, &geom->lg_provider, lg_provider)
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if (strcmp (provider->lg_name, name) == 0)
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{
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char *name_tmp = xstrdup (geom->lg_name);
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grub_disk_addr_t off = 0;
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struct gconfig *config;
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grub_util_info ("geom '%s' has parent '%s'", name, geom->lg_name);
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grub_util_follow_gpart_up (name_tmp, &off, name_out);
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free (name_tmp);
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LIST_FOREACH (config, &provider->lg_config, lg_config)
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if (strcasecmp (config->lg_name, "start") == 0)
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off += strtoull (config->lg_val, 0, 10);
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if (off_out)
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*off_out = off;
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return;
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}
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}
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grub_util_info ("geom '%s' has no parent", name);
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if (name_out)
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*name_out = xstrdup (name);
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if (off_out)
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*off_out = 0;
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}
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grub_disk_addr_t
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grub_util_find_partition_start_os (const char *dev)
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{
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grub_disk_addr_t out;
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if (strncmp (dev, "/dev/", sizeof ("/dev/") - 1) != 0)
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return 0;
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grub_util_follow_gpart_up (dev + sizeof ("/dev/") - 1, &out, NULL);
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return out;
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}
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