771 lines
17 KiB
C
771 lines
17 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 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/util/misc.h>
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#include <grub/emu/exec.h>
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#include <grub/cryptodisk.h>
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#include <grub/i18n.h>
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#if !defined (__MINGW32__) && !defined (__CYGWIN__) && !defined (__AROS__) && !defined (__HAIKU__)
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#ifdef __linux__
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#include <sys/ioctl.h> /* ioctl */
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#include <sys/mount.h>
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#ifndef MAJOR
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# ifndef MINORBITS
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# define MINORBITS 8
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# endif /* ! MINORBITS */
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# define MAJOR(dev) ((unsigned) ((dev) >> MINORBITS))
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#endif /* ! MAJOR */
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#ifndef FLOPPY_MAJOR
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# define FLOPPY_MAJOR 2
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#endif /* ! FLOPPY_MAJOR */
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#endif
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#include <sys/types.h>
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#if defined(HAVE_LIBZFS) && defined(HAVE_LIBNVPAIR)
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# include <grub/util/libzfs.h>
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# include <grub/util/libnvpair.h>
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#endif
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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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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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# define MAJOR(dev) major(dev)
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# define FLOPPY_MAJOR 2
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#endif
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#if defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
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#include <sys/mount.h>
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#endif
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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# include <sys/ioctl.h>
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# include <sys/disklabel.h> /* struct disklabel */
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# include <sys/disk.h> /* struct dkwedge_info */
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#include <sys/param.h>
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#include <sys/mount.h>
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#endif /* defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) */
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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# define MAJOR(dev) major(dev)
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# ifdef HAVE_GETRAWPARTITION
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# include <util.h> /* getrawpartition */
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# endif /* HAVE_GETRAWPARTITION */
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#if defined(__NetBSD__)
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# include <sys/fdio.h>
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#endif
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# ifndef FLOPPY_MAJOR
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# define FLOPPY_MAJOR 2
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# endif /* ! FLOPPY_MAJOR */
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# ifndef RAW_FLOPPY_MAJOR
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# define RAW_FLOPPY_MAJOR 9
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# endif /* ! RAW_FLOPPY_MAJOR */
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#endif /* defined(__NetBSD__) */
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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#define LVM_DEV_MAPPER_STRING "/dev/linux_lvm/"
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#else
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#define LVM_DEV_MAPPER_STRING "/dev/mapper/"
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#endif
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#include <sys/types.h>
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#include <sys/wait.h>
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#if defined(HAVE_STRUCT_STATFS_F_FSTYPENAME) && defined(HAVE_STRUCT_STATFS_F_MNTFROMNAME)
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#include <sys/param.h>
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#include <sys/mount.h>
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#endif
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static void
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strip_extra_slashes (char *dir)
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{
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char *p = dir;
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while ((p = strchr (p, '/')) != 0)
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{
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if (p[1] == '/')
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{
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memmove (p, p + 1, strlen (p));
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continue;
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}
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else if (p[1] == '\0')
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{
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if (p > dir)
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p[0] = '\0';
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break;
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}
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p++;
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}
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}
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static char *
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xgetcwd (void)
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{
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size_t size = 10;
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char *path;
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path = xmalloc (size);
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while (! getcwd (path, size))
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{
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size <<= 1;
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path = xrealloc (path, size);
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}
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return path;
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}
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#if !defined (__GNU__)
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char **
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grub_util_find_root_devices_from_poolname (char *poolname)
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{
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char **devices = 0;
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size_t ndevices = 0;
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size_t devices_allocated = 0;
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#if defined(HAVE_LIBZFS) && defined(HAVE_LIBNVPAIR)
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zpool_handle_t *zpool;
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libzfs_handle_t *libzfs;
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nvlist_t *config, *vdev_tree;
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nvlist_t **children;
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unsigned int nvlist_count;
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unsigned int i;
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char *device = 0;
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libzfs = grub_get_libzfs_handle ();
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if (! libzfs)
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return NULL;
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zpool = zpool_open (libzfs, poolname);
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config = zpool_get_config (zpool, NULL);
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if (nvlist_lookup_nvlist (config, "vdev_tree", &vdev_tree) != 0)
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error (1, errno, "nvlist_lookup_nvlist (\"vdev_tree\")");
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if (nvlist_lookup_nvlist_array (vdev_tree, "children", &children, &nvlist_count) != 0)
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error (1, errno, "nvlist_lookup_nvlist_array (\"children\")");
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assert (nvlist_count > 0);
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while (nvlist_lookup_nvlist_array (children[0], "children",
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&children, &nvlist_count) == 0)
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assert (nvlist_count > 0);
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for (i = 0; i < nvlist_count; i++)
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{
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if (nvlist_lookup_string (children[i], "path", &device) != 0)
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error (1, errno, "nvlist_lookup_string (\"path\")");
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struct stat st;
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if (stat (device, &st) == 0)
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{
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#ifdef __sun__
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if (grub_memcmp (device, "/dev/dsk/", sizeof ("/dev/dsk/") - 1)
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== 0)
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device = xasprintf ("/dev/rdsk/%s",
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device + sizeof ("/dev/dsk/") - 1);
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else if (grub_memcmp (device, "/devices", sizeof ("/devices") - 1)
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== 0
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&& grub_memcmp (device + strlen (device) - 4,
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",raw", 4) != 0)
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device = xasprintf ("%s,raw", device);
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else
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#endif
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device = xstrdup (device);
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if (ndevices >= devices_allocated)
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{
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devices_allocated = 2 * (devices_allocated + 8);
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devices = xrealloc (devices, sizeof (devices[0])
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* devices_allocated);
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}
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devices[ndevices++] = device;
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}
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device = NULL;
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}
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zpool_close (zpool);
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#else
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FILE *fp;
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int ret;
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char *line;
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size_t len;
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int st;
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char name[PATH_MAX + 1], state[257], readlen[257], writelen[257];
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char cksum[257], notes[257];
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unsigned int dummy;
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const char *argv[4];
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pid_t pid;
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int fd;
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argv[0] = "zpool";
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argv[1] = "status";
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argv[2] = poolname;
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argv[3] = NULL;
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pid = grub_util_exec_pipe (argv, &fd);
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if (!pid)
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return NULL;
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fp = fdopen (fd, "r");
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if (!fp)
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{
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grub_util_warn (_("Unable to open stream from %s: %s"),
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"zpool", strerror (errno));
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goto out;
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}
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st = 0;
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while (1)
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{
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line = NULL;
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ret = getline (&line, &len, fp);
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if (ret == -1)
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break;
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if (sscanf (line, " %s %256s %256s %256s %256s %256s",
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name, state, readlen, writelen, cksum, notes) >= 5)
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switch (st)
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{
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case 0:
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if (!strcmp (name, "NAME")
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&& !strcmp (state, "STATE")
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&& !strcmp (readlen, "READ")
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&& !strcmp (writelen, "WRITE")
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&& !strcmp (cksum, "CKSUM"))
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st++;
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break;
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case 1:
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{
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char *ptr = line;
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while (1)
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{
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if (strncmp (ptr, poolname, strlen (poolname)) == 0
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&& grub_isspace(ptr[strlen (poolname)]))
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st++;
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if (!grub_isspace (*ptr))
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break;
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ptr++;
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}
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}
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break;
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case 2:
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if (strcmp (name, "mirror") && !sscanf (name, "mirror-%u", &dummy)
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&& !sscanf (name, "raidz%u", &dummy)
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&& !sscanf (name, "raidz1%u", &dummy)
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&& !sscanf (name, "raidz2%u", &dummy)
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&& !sscanf (name, "raidz3%u", &dummy)
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&& !strcmp (state, "ONLINE"))
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{
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if (ndevices >= devices_allocated)
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{
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devices_allocated = 2 * (devices_allocated + 8);
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devices = xrealloc (devices, sizeof (devices[0])
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* devices_allocated);
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}
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if (name[0] == '/')
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devices[ndevices++] = xstrdup (name);
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else
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devices[ndevices++] = xasprintf ("/dev/%s", name);
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}
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break;
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}
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free (line);
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}
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out:
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close (fd);
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waitpid (pid, NULL, 0);
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#endif
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if (devices)
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{
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if (ndevices >= devices_allocated)
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{
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devices_allocated = 2 * (devices_allocated + 8);
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devices = xrealloc (devices, sizeof (devices[0])
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* devices_allocated);
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}
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devices[ndevices++] = 0;
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}
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return devices;
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}
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static char **
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find_root_devices_from_libzfs (const char *dir)
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{
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char **devices = NULL;
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char *poolname;
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char *poolfs;
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grub_find_zpool_from_dir (dir, &poolname, &poolfs);
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if (! poolname)
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return NULL;
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devices = grub_util_find_root_devices_from_poolname (poolname);
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free (poolname);
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if (poolfs)
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free (poolfs);
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return devices;
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}
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char *
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grub_find_device (const char *dir, dev_t dev)
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{
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DIR *dp;
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char *saved_cwd;
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struct dirent *ent;
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if (! dir)
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dir = "/dev";
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dp = opendir (dir);
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if (! dp)
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return 0;
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saved_cwd = xgetcwd ();
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grub_util_info ("changing current directory to %s", dir);
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if (chdir (dir) < 0)
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{
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free (saved_cwd);
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closedir (dp);
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return 0;
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}
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while ((ent = readdir (dp)) != 0)
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{
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struct stat st;
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/* Avoid:
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- dotfiles (like "/dev/.tmp.md0") since they could be duplicates.
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- dotdirs (like "/dev/.static") since they could contain duplicates. */
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if (ent->d_name[0] == '.')
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continue;
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if (lstat (ent->d_name, &st) < 0)
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/* Ignore any error. */
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continue;
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if (S_ISLNK (st.st_mode)) {
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#ifdef __linux__
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if (strcmp (dir, "mapper") == 0 || strcmp (dir, "/dev/mapper") == 0) {
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/* Follow symbolic links under /dev/mapper/; the canonical name
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may be something like /dev/dm-0, but the names under
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/dev/mapper/ are more human-readable and so we prefer them if
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we can get them. */
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if (stat (ent->d_name, &st) < 0)
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continue;
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} else
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#endif /* __linux__ */
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/* Don't follow other symbolic links. */
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continue;
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}
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if (S_ISDIR (st.st_mode))
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{
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/* Find it recursively. */
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char *res;
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res = grub_find_device (ent->d_name, dev);
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if (res)
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{
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if (chdir (saved_cwd) < 0)
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grub_util_error ("%s",
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_("cannot restore the original directory"));
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free (saved_cwd);
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closedir (dp);
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return res;
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}
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}
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__)
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if (S_ISCHR (st.st_mode) && st.st_rdev == dev)
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#else
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if (S_ISBLK (st.st_mode) && st.st_rdev == dev)
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#endif
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{
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#ifdef __linux__
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/* Skip device names like /dev/dm-0, which are short-hand aliases
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to more descriptive device names, e.g. those under /dev/mapper */
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if (ent->d_name[0] == 'd' &&
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ent->d_name[1] == 'm' &&
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ent->d_name[2] == '-' &&
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ent->d_name[3] >= '0' &&
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ent->d_name[3] <= '9')
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continue;
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#endif
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/* Found! */
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char *res;
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char *cwd;
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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/* Convert this block device to its character (raw) device. */
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const char *template = "%s/r%s";
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#else
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/* Keep the device name as it is. */
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const char *template = "%s/%s";
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#endif
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cwd = xgetcwd ();
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res = xmalloc (strlen (cwd) + strlen (ent->d_name) + 3);
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sprintf (res, template, cwd, ent->d_name);
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strip_extra_slashes (res);
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free (cwd);
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/* /dev/root is not a real block device keep looking, takes care
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of situation where root filesystem is on the same partition as
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grub files */
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if (strcmp(res, "/dev/root") == 0)
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{
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free (res);
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continue;
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}
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if (chdir (saved_cwd) < 0)
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grub_util_error ("%s", _("cannot restore the original directory"));
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free (saved_cwd);
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closedir (dp);
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return res;
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}
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}
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if (chdir (saved_cwd) < 0)
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grub_util_error ("%s", _("cannot restore the original directory"));
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free (saved_cwd);
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closedir (dp);
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return 0;
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}
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char **
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grub_guess_root_devices (const char *dir_in)
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{
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char **os_dev = NULL;
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struct stat st;
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dev_t dev;
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char *dir = canonicalize_file_name (dir_in);
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if (!dir)
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grub_util_error (_("failed to get canonical path of `%s'"), dir_in);
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#ifdef __linux__
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if (!os_dev)
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os_dev = grub_find_root_devices_from_mountinfo (dir, NULL);
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#endif /* __linux__ */
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if (!os_dev)
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os_dev = find_root_devices_from_libzfs (dir);
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if (os_dev)
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{
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char **cur;
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for (cur = os_dev; *cur; cur++)
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{
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char *tmp = *cur;
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int root, dm;
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if (strcmp (*cur, "/dev/root") == 0
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|| strncmp (*cur, "/dev/dm-", sizeof ("/dev/dm-") - 1) == 0)
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*cur = tmp;
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else
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{
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*cur = canonicalize_file_name (tmp);
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if (*cur == NULL)
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grub_util_error (_("failed to get canonical path of `%s'"), tmp);
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free (tmp);
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}
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root = (strcmp (*cur, "/dev/root") == 0);
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dm = (strncmp (*cur, "/dev/dm-", sizeof ("/dev/dm-") - 1) == 0);
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if (!dm && !root)
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continue;
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if (stat (*cur, &st) < 0)
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break;
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free (*cur);
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dev = st.st_rdev;
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*cur = grub_find_device (dm ? "/dev/mapper" : "/dev", dev);
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}
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if (!*cur)
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return os_dev;
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for (cur = os_dev; *cur; cur++)
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free (*cur);
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free (os_dev);
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os_dev = 0;
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}
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if (stat (dir, &st) < 0)
|
|
grub_util_error (_("cannot stat `%s': %s"), dir, strerror (errno));
|
|
|
|
dev = st.st_dev;
|
|
|
|
os_dev = xmalloc (2 * sizeof (os_dev[0]));
|
|
|
|
/* This might be truly slow, but is there any better way? */
|
|
os_dev[0] = grub_find_device ("/dev", dev);
|
|
|
|
if (!os_dev[0])
|
|
{
|
|
free (os_dev);
|
|
return 0;
|
|
}
|
|
|
|
os_dev[1] = 0;
|
|
|
|
return os_dev;
|
|
}
|
|
|
|
#endif
|
|
|
|
void
|
|
grub_util_pull_lvm_by_command (const char *os_dev)
|
|
{
|
|
const char *argv[8];
|
|
int fd;
|
|
pid_t pid;
|
|
FILE *mdadm;
|
|
char *buf = NULL;
|
|
size_t len = 0;
|
|
char *vgname = NULL;
|
|
const char *iptr;
|
|
char *optr;
|
|
char *vgid = NULL;
|
|
grub_size_t vgidlen = 0;
|
|
|
|
vgid = grub_util_get_vg_uuid (os_dev);
|
|
if (vgid)
|
|
vgidlen = grub_strlen (vgid);
|
|
|
|
if (!vgid)
|
|
{
|
|
if (strncmp (os_dev, LVM_DEV_MAPPER_STRING,
|
|
sizeof (LVM_DEV_MAPPER_STRING) - 1)
|
|
!= 0)
|
|
return;
|
|
|
|
vgname = xmalloc (strlen (os_dev + sizeof (LVM_DEV_MAPPER_STRING) - 1) + 1);
|
|
for (iptr = os_dev + sizeof (LVM_DEV_MAPPER_STRING) - 1, optr = vgname; *iptr; )
|
|
if (*iptr != '-')
|
|
*optr++ = *iptr++;
|
|
else if (iptr[0] == '-' && iptr[1] == '-')
|
|
{
|
|
iptr += 2;
|
|
*optr++ = '-';
|
|
}
|
|
else
|
|
break;
|
|
*optr = '\0';
|
|
}
|
|
|
|
/* by default PV name is left aligned in 10 character field, meaning that
|
|
we do not know where name ends. Using dummy --separator disables
|
|
alignment. We have a single field, so separator itself is not output */
|
|
argv[0] = "vgs";
|
|
argv[1] = "--options";
|
|
if (vgid)
|
|
argv[2] = "vg_uuid,pv_name";
|
|
else
|
|
argv[2] = "pv_name";
|
|
argv[3] = "--noheadings";
|
|
argv[4] = "--separator";
|
|
argv[5] = ":";
|
|
argv[6] = vgname;
|
|
argv[7] = NULL;
|
|
|
|
pid = grub_util_exec_pipe (argv, &fd);
|
|
free (vgname);
|
|
|
|
if (!pid)
|
|
return;
|
|
|
|
/* Parent. Read mdadm's output. */
|
|
mdadm = fdopen (fd, "r");
|
|
if (! mdadm)
|
|
{
|
|
grub_util_warn (_("Unable to open stream from %s: %s"),
|
|
"vgs", strerror (errno));
|
|
goto out;
|
|
}
|
|
|
|
while (getline (&buf, &len, mdadm) > 0)
|
|
{
|
|
char *ptr;
|
|
/* LVM adds two spaces as standard prefix */
|
|
for (ptr = buf; ptr < buf + 2 && *ptr == ' '; ptr++);
|
|
|
|
if (vgid && (grub_strncmp (vgid, ptr, vgidlen) != 0
|
|
|| ptr[vgidlen] != ':'))
|
|
continue;
|
|
if (vgid)
|
|
ptr += vgidlen + 1;
|
|
if (*ptr == '\0')
|
|
continue;
|
|
*(ptr + strlen (ptr) - 1) = '\0';
|
|
grub_util_pull_device (ptr);
|
|
}
|
|
|
|
out:
|
|
close (fd);
|
|
waitpid (pid, NULL, 0);
|
|
free (buf);
|
|
}
|
|
|
|
/* ZFS has similar problems to those of btrfs (see above). */
|
|
void
|
|
grub_find_zpool_from_dir (const char *dir, char **poolname, char **poolfs)
|
|
{
|
|
char *slash;
|
|
|
|
*poolname = *poolfs = NULL;
|
|
|
|
#if defined(HAVE_STRUCT_STATFS_F_FSTYPENAME) && defined(HAVE_STRUCT_STATFS_F_MNTFROMNAME)
|
|
/* FreeBSD and GNU/kFreeBSD. */
|
|
{
|
|
struct statfs mnt;
|
|
|
|
if (statfs (dir, &mnt) != 0)
|
|
return;
|
|
|
|
if (strcmp (mnt.f_fstypename, "zfs") != 0)
|
|
return;
|
|
|
|
*poolname = xstrdup (mnt.f_mntfromname);
|
|
}
|
|
#elif defined(HAVE_GETEXTMNTENT)
|
|
/* Solaris. */
|
|
{
|
|
struct stat st;
|
|
struct extmnttab mnt;
|
|
|
|
if (stat (dir, &st) != 0)
|
|
return;
|
|
|
|
FILE *mnttab = grub_util_fopen ("/etc/mnttab", "r");
|
|
if (! mnttab)
|
|
return;
|
|
|
|
while (getextmntent (mnttab, &mnt, sizeof (mnt)) == 0)
|
|
{
|
|
if (makedev (mnt.mnt_major, mnt.mnt_minor) == st.st_dev
|
|
&& !strcmp (mnt.mnt_fstype, "zfs"))
|
|
{
|
|
*poolname = xstrdup (mnt.mnt_special);
|
|
break;
|
|
}
|
|
}
|
|
|
|
fclose (mnttab);
|
|
}
|
|
#endif
|
|
|
|
if (! *poolname)
|
|
return;
|
|
|
|
slash = strchr (*poolname, '/');
|
|
if (slash)
|
|
{
|
|
*slash = '\0';
|
|
*poolfs = xstrdup (slash + 1);
|
|
}
|
|
else
|
|
*poolfs = xstrdup ("");
|
|
}
|
|
|
|
int
|
|
grub_util_biosdisk_is_floppy (grub_disk_t disk)
|
|
{
|
|
struct stat st;
|
|
int fd;
|
|
const char *dname;
|
|
|
|
dname = grub_util_biosdisk_get_osdev (disk);
|
|
|
|
if (!dname)
|
|
return 0;
|
|
|
|
fd = open (dname, O_RDONLY);
|
|
/* Shouldn't happen. */
|
|
if (fd == -1)
|
|
return 0;
|
|
|
|
/* Shouldn't happen either. */
|
|
if (fstat (fd, &st) < 0)
|
|
{
|
|
close (fd);
|
|
return 0;
|
|
}
|
|
|
|
close (fd);
|
|
|
|
#if defined(__NetBSD__)
|
|
if (major(st.st_rdev) == RAW_FLOPPY_MAJOR)
|
|
return 1;
|
|
#endif
|
|
|
|
#if defined(FLOPPY_MAJOR)
|
|
if (major(st.st_rdev) == FLOPPY_MAJOR)
|
|
#else
|
|
/* Some kernels (e.g. kFreeBSD) don't have a static major number
|
|
for floppies, but they still use a "fd[0-9]" pathname. */
|
|
if (dname[5] == 'f'
|
|
&& dname[6] == 'd'
|
|
&& dname[7] >= '0'
|
|
&& dname[7] <= '9')
|
|
#endif
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
void
|
|
grub_util_pull_lvm_by_command (const char *os_dev __attribute__ ((unused)))
|
|
{
|
|
}
|
|
|
|
#endif
|