e0f4c43882
(grub_device_mapper_supported): New function. * include/grub/emu/misc.h (grub_device_mapper_supported): Add prototype. * kern/emu/hostdisk.c (find_partition_start): Check whether device-mapper is supported before trying to use it. * util/deviceiter.c (grub_util_iterate_devices): Likewise.
790 lines
18 KiB
C
790 lines
18 KiB
C
/* deviceiter.c - iterate over system devices */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008 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.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <grub/util/misc.h>
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#include <grub/util/deviceiter.h>
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#include <grub/list.h>
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#include <grub/misc.h>
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#include <grub/emu/misc.h>
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#ifdef __linux__
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# if !defined(__GLIBC__) || \
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((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1)))
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/* Maybe libc doesn't have large file support. */
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# include <linux/unistd.h> /* _llseek */
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# endif /* (GLIBC < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR < 1)) */
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# include <sys/ioctl.h> /* ioctl */
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# ifndef HDIO_GETGEO
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# define HDIO_GETGEO 0x0301 /* get device geometry */
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/* If HDIO_GETGEO is not defined, it is unlikely that hd_geometry is
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defined. */
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struct hd_geometry
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{
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders;
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unsigned long start;
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};
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# endif /* ! HDIO_GETGEO */
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# ifndef FLOPPY_MAJOR
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# define FLOPPY_MAJOR 2 /* the major number for floppy */
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# endif /* ! FLOPPY_MAJOR */
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# ifndef MAJOR
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# define MAJOR(dev) \
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({ \
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unsigned long long __dev = (dev); \
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(unsigned) ((__dev >> 8) & 0xfff) \
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| ((unsigned int) (__dev >> 32) & ~0xfff); \
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})
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# endif /* ! MAJOR */
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# ifndef MINOR
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# define MINOR(dev) \
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({ \
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unsigned long long __dev = (dev); \
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(unsigned) (__dev & 0xff) | ((unsigned int) (__dev >> 12) & ~0xff); \
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})
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# endif /* ! MINOR */
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# ifndef CDROM_GET_CAPABILITY
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# define CDROM_GET_CAPABILITY 0x5331 /* get capabilities */
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# endif /* ! CDROM_GET_CAPABILITY */
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# ifndef BLKGETSIZE
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# define BLKGETSIZE _IO(0x12,96) /* return device size */
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# endif /* ! BLKGETSIZE */
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#ifdef HAVE_DEVICE_MAPPER
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# include <libdevmapper.h>
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#endif
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#endif /* __linux__ */
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/* Use __FreeBSD_kernel__ instead of __FreeBSD__ for compatibility with
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kFreeBSD-based non-FreeBSD systems (e.g. GNU/kFreeBSD) */
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#if defined(__FreeBSD__) && ! defined(__FreeBSD_kernel__)
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# define __FreeBSD_kernel__
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#endif
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#ifdef __FreeBSD_kernel__
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/* Obtain version of kFreeBSD headers */
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# include <osreldate.h>
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# ifndef __FreeBSD_kernel_version
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# define __FreeBSD_kernel_version __FreeBSD_version
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# endif
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/* Runtime detection of kernel */
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# include <sys/utsname.h>
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int
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get_kfreebsd_version (void)
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{
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struct utsname uts;
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int major;
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int minor;
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int v[2];
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uname (&uts);
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sscanf (uts.release, "%d.%d", &major, &minor);
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if (major >= 9)
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major = 9;
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if (major >= 5)
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{
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v[0] = minor/10; v[1] = minor%10;
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}
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else
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{
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v[0] = minor%10; v[1] = minor/10;
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}
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return major*100000+v[0]*10000+v[1]*1000;
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}
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#endif /* __FreeBSD_kernel__ */
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#if defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# include <sys/ioctl.h> /* ioctl */
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# include <sys/disklabel.h>
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# include <sys/cdio.h> /* CDIOCCLRDEBUG */
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# if defined(__FreeBSD_kernel__)
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# include <sys/param.h>
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# if __FreeBSD_kernel_version >= 500040
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# include <sys/disk.h>
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# endif
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# endif /* __FreeBSD_kernel__ */
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#endif /* __FreeBSD_kernel__ || __NetBSD__ || __OpenBSD__ */
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#ifdef HAVE_OPENDISK
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# include <util.h>
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#endif /* HAVE_OPENDISK */
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#ifdef __linux__
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/* Check if we have devfs support. */
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static int
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have_devfs (void)
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{
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struct stat st;
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return stat ("/dev/.devfsd", &st) == 0;
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}
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#endif /* __linux__ */
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/* These three functions are quite different among OSes. */
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static void
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get_floppy_disk_name (char *name, int unit)
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{
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#if defined(__linux__)
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/* GNU/Linux */
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if (have_devfs ())
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sprintf (name, "/dev/floppy/%d", unit);
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else
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sprintf (name, "/dev/fd%d", unit);
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#elif defined(__GNU__)
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/* GNU/Hurd */
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sprintf (name, "/dev/fd%d", unit);
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#elif defined(__FreeBSD_kernel__)
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/* kFreeBSD */
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if (get_kfreebsd_version () >= 400000)
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sprintf (name, "/dev/fd%d", unit);
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else
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sprintf (name, "/dev/rfd%d", unit);
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#elif defined(__NetBSD__)
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/* NetBSD */
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/* opendisk() doesn't work for floppies. */
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sprintf (name, "/dev/rfd%da", unit);
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#elif defined(__OpenBSD__)
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/* OpenBSD */
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sprintf (name, "/dev/rfd%dc", unit);
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#elif defined(__QNXNTO__)
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/* QNX RTP */
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sprintf (name, "/dev/fd%d", unit);
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#elif defined(__CYGWIN__)
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/* Cygwin */
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sprintf (name, "/dev/fd%d", unit);
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#elif defined(__MINGW32__)
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(void) unit;
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*name = 0;
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#else
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# warning "BIOS floppy drives cannot be guessed in your operating system."
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/* Set NAME to a bogus string. */
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*name = 0;
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#endif
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}
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static void
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get_ide_disk_name (char *name, int unit)
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{
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#if defined(__linux__)
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/* GNU/Linux */
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sprintf (name, "/dev/hd%c", unit + 'a');
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#elif defined(__GNU__)
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/* GNU/Hurd */
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sprintf (name, "/dev/hd%d", unit);
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#elif defined(__FreeBSD_kernel__)
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/* kFreeBSD */
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if (get_kfreebsd_version () >= 400000)
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sprintf (name, "/dev/ad%d", unit);
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else
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sprintf (name, "/dev/rwd%d", unit);
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#elif defined(__NetBSD__) && defined(HAVE_OPENDISK)
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/* NetBSD */
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char shortname[16];
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int fd;
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sprintf (shortname, "wd%d", unit);
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fd = opendisk (shortname, O_RDONLY, name,
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16, /* length of NAME */
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0 /* char device */
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);
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close (fd);
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#elif defined(__OpenBSD__)
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/* OpenBSD */
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sprintf (name, "/dev/rwd%dc", unit);
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#elif defined(__QNXNTO__)
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/* QNX RTP */
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/* Actually, QNX RTP doesn't distinguish IDE from SCSI, so this could
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contain SCSI disks. */
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sprintf (name, "/dev/hd%d", unit);
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#elif defined(__CYGWIN__)
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/* Cygwin emulates all disks as /dev/sdX. */
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(void) unit;
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*name = 0;
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#elif defined(__MINGW32__)
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sprintf (name, "//./PHYSICALDRIVE%d", unit);
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#else
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# warning "BIOS IDE drives cannot be guessed in your operating system."
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/* Set NAME to a bogus string. */
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*name = 0;
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#endif
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}
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static void
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get_scsi_disk_name (char *name, int unit)
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{
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#if defined(__linux__)
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/* GNU/Linux */
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sprintf (name, "/dev/sd%c", unit + 'a');
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#elif defined(__GNU__)
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/* GNU/Hurd */
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sprintf (name, "/dev/sd%d", unit);
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#elif defined(__FreeBSD_kernel__)
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/* kFreeBSD */
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if (get_kfreebsd_version () >= 400000)
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sprintf (name, "/dev/da%d", unit);
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else
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sprintf (name, "/dev/rda%d", unit);
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#elif defined(__NetBSD__) && defined(HAVE_OPENDISK)
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/* NetBSD */
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char shortname[16];
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int fd;
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sprintf (shortname, "sd%d", unit);
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fd = opendisk (shortname, O_RDONLY, name,
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16, /* length of NAME */
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0 /* char device */
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);
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close (fd);
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#elif defined(__OpenBSD__)
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/* OpenBSD */
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sprintf (name, "/dev/rsd%dc", unit);
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#elif defined(__QNXNTO__)
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/* QNX RTP */
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/* QNX RTP doesn't distinguish SCSI from IDE, so it is better to
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disable the detection of SCSI disks here. */
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*name = 0;
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#elif defined(__CYGWIN__)
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/* Cygwin emulates all disks as /dev/sdX. */
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sprintf (name, "/dev/sd%c", unit + 'a');
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#elif defined(__MINGW32__)
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(void) unit;
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*name = 0;
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#else
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# warning "BIOS SCSI drives cannot be guessed in your operating system."
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/* Set NAME to a bogus string. */
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*name = 0;
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#endif
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}
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#ifdef __linux__
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static void
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get_virtio_disk_name (char *name, int unit)
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{
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#ifdef __sparc__
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sprintf (name, "/dev/vdisk%c", unit + 'a');
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#else
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sprintf (name, "/dev/vd%c", unit + 'a');
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#endif
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}
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static void
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get_dac960_disk_name (char *name, int controller, int drive)
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{
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sprintf (name, "/dev/rd/c%dd%d", controller, drive);
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}
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static void
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get_acceleraid_disk_name (char *name, int controller, int drive)
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{
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sprintf (name, "/dev/rs/c%dd%d", controller, drive);
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}
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static void
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get_ataraid_disk_name (char *name, int unit)
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{
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sprintf (name, "/dev/ataraid/d%c", unit + '0');
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}
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static void
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get_i2o_disk_name (char *name, char unit)
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{
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sprintf (name, "/dev/i2o/hd%c", unit);
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}
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static void
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get_cciss_disk_name (char *name, int controller, int drive)
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{
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sprintf (name, "/dev/cciss/c%dd%d", controller, drive);
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}
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static void
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get_ida_disk_name (char *name, int controller, int drive)
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{
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sprintf (name, "/dev/ida/c%dd%d", controller, drive);
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}
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static void
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get_mmc_disk_name (char *name, int unit)
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{
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sprintf (name, "/dev/mmcblk%d", unit);
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}
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static void
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get_xvd_disk_name (char *name, int unit)
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{
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sprintf (name, "/dev/xvd%c", unit + 'a');
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}
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#endif
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/* Check if DEVICE can be read. If an error occurs, return zero,
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otherwise return non-zero. */
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static int
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check_device (const char *device)
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{
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char buf[512];
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FILE *fp;
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/* If DEVICE is empty, just return error. */
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if (*device == 0)
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return 0;
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fp = fopen (device, "r");
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if (! fp)
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{
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switch (errno)
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{
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#ifdef ENOMEDIUM
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case ENOMEDIUM:
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# if 0
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/* At the moment, this finds only CDROMs, which can't be
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read anyway, so leave it out. Code should be
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reactivated if `removable disks' and CDROMs are
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supported. */
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/* Accept it, it may be inserted. */
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return 1;
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# endif
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break;
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#endif /* ENOMEDIUM */
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default:
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/* Break case and leave. */
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break;
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}
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/* Error opening the device. */
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return 0;
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}
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/* Make sure CD-ROMs don't get assigned a BIOS disk number
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before SCSI disks! */
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#ifdef __linux__
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# ifdef CDROM_GET_CAPABILITY
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if (ioctl (fileno (fp), CDROM_GET_CAPABILITY, 0) >= 0)
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return 0;
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# else /* ! CDROM_GET_CAPABILITY */
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/* Check if DEVICE is a CD-ROM drive by the HDIO_GETGEO ioctl. */
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{
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struct hd_geometry hdg;
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struct stat st;
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if (fstat (fileno (fp), &st))
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return 0;
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/* If it is a block device and isn't a floppy, check if HDIO_GETGEO
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succeeds. */
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if (S_ISBLK (st.st_mode)
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&& MAJOR (st.st_rdev) != FLOPPY_MAJOR
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&& ioctl (fileno (fp), HDIO_GETGEO, &hdg))
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return 0;
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}
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# endif /* ! CDROM_GET_CAPABILITY */
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#endif /* __linux__ */
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#if defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# ifdef CDIOCCLRDEBUG
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if (ioctl (fileno (fp), CDIOCCLRDEBUG, 0) >= 0)
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return 0;
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# endif /* CDIOCCLRDEBUG */
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#endif /* __FreeBSD_kernel__ || __NetBSD__ || __OpenBSD__ */
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/* Attempt to read the first sector. */
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if (fread (buf, 1, 512, fp) != 512)
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{
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fclose (fp);
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return 0;
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}
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fclose (fp);
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return 1;
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}
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#ifdef __linux__
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# ifdef HAVE_DEVICE_MAPPER
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struct dmraid_seen
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{
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struct dmraid_seen *next;
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const char *name;
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};
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# endif /* HAVE_DEVICE_MAPPER */
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#endif /* __linux__ */
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void
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grub_util_iterate_devices (int NESTED_FUNC_ATTR (*hook) (const char *, int),
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int floppy_disks)
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{
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int i;
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/* Floppies. */
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for (i = 0; i < floppy_disks; i++)
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{
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char name[16];
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struct stat st;
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get_floppy_disk_name (name, i);
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if (stat (name, &st) < 0)
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break;
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/* In floppies, write the map, whether check_device succeeds
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or not, because the user just may not insert floppies. */
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if (hook (name, 1))
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return;
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}
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#ifdef __linux__
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if (have_devfs ())
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{
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i = 0;
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while (1)
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{
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char discn[32];
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char name[PATH_MAX];
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struct stat st;
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/* Linux creates symlinks "/dev/discs/discN" for convenience.
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The way to number disks is the same as GRUB's. */
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sprintf (discn, "/dev/discs/disc%d", i++);
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if (stat (discn, &st) < 0)
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break;
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if (realpath (discn, name))
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{
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strcat (name, "/disc");
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if (hook (name, 0))
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return;
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}
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}
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return;
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}
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#endif /* __linux__ */
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/* IDE disks. */
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for (i = 0; i < 26; i++)
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{
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char name[16];
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get_ide_disk_name (name, i);
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if (check_device (name))
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{
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if (hook (name, 0))
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return;
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}
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}
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#ifdef __linux__
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/* Virtio disks. */
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for (i = 0; i < 26; i++)
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{
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char name[16];
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get_virtio_disk_name (name, i);
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if (check_device (name))
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{
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if (hook (name, 0))
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return;
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}
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}
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/* ATARAID disks. */
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for (i = 0; i < 8; i++)
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{
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char name[20];
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get_ataraid_disk_name (name, i);
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if (check_device (name))
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{
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if (hook (name, 0))
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return;
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}
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}
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/* Xen virtual block devices. */
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for (i = 0; i < 26; i++)
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{
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char name[16];
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get_xvd_disk_name (name, i);
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if (check_device (name))
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{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
#endif /* __linux__ */
|
|
|
|
/* The rest is SCSI disks. */
|
|
for (i = 0; i < 26; i++)
|
|
{
|
|
char name[16];
|
|
|
|
get_scsi_disk_name (name, i);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
|
|
#ifdef __linux__
|
|
/* This is for DAC960 - we have
|
|
/dev/rd/c<controller>d<logical drive>p<partition>.
|
|
|
|
DAC960 driver currently supports up to 8 controllers, 32 logical
|
|
drives, and 7 partitions. */
|
|
{
|
|
int controller, drive;
|
|
|
|
for (controller = 0; controller < 8; controller++)
|
|
{
|
|
for (drive = 0; drive < 15; drive++)
|
|
{
|
|
char name[24];
|
|
|
|
get_dac960_disk_name (name, controller, drive);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* This is for Mylex Acceleraid - we have
|
|
/dev/rd/c<controller>d<logical drive>p<partition>. */
|
|
{
|
|
int controller, drive;
|
|
|
|
for (controller = 0; controller < 8; controller++)
|
|
{
|
|
for (drive = 0; drive < 15; drive++)
|
|
{
|
|
char name[24];
|
|
|
|
get_acceleraid_disk_name (name, controller, drive);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* This is for CCISS - we have
|
|
/dev/cciss/c<controller>d<logical drive>p<partition>. */
|
|
{
|
|
int controller, drive;
|
|
|
|
for (controller = 0; controller < 3; controller++)
|
|
{
|
|
for (drive = 0; drive < 16; drive++)
|
|
{
|
|
char name[24];
|
|
|
|
get_cciss_disk_name (name, controller, drive);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* This is for Compaq Intelligent Drive Array - we have
|
|
/dev/ida/c<controller>d<logical drive>p<partition>. */
|
|
{
|
|
int controller, drive;
|
|
|
|
for (controller = 0; controller < 3; controller++)
|
|
{
|
|
for (drive = 0; drive < 16; drive++)
|
|
{
|
|
char name[24];
|
|
|
|
get_ida_disk_name (name, controller, drive);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* This is for I2O - we have /dev/i2o/hd<logical drive><partition> */
|
|
{
|
|
char unit;
|
|
|
|
for (unit = 'a'; unit < 'f'; unit++)
|
|
{
|
|
char name[24];
|
|
|
|
get_i2o_disk_name (name, unit);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* MultiMediaCard (MMC). */
|
|
for (i = 0; i < 10; i++)
|
|
{
|
|
char name[16];
|
|
|
|
get_mmc_disk_name (name, i);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
return;
|
|
}
|
|
}
|
|
|
|
# ifdef HAVE_DEVICE_MAPPER
|
|
# define dmraid_check(cond, ...) \
|
|
if (! (cond)) \
|
|
{ \
|
|
grub_dprintf ("deviceiter", __VA_ARGS__); \
|
|
goto dmraid_end; \
|
|
}
|
|
|
|
/* DM-RAID. */
|
|
if (grub_device_mapper_supported ())
|
|
{
|
|
struct dm_tree *tree = NULL;
|
|
struct dm_task *task = NULL;
|
|
struct dm_names *names = NULL;
|
|
unsigned int next = 0;
|
|
void *top_handle, *second_handle;
|
|
struct dm_tree_node *root, *top, *second;
|
|
struct dmraid_seen *seen = NULL;
|
|
|
|
/* Build DM tree for all devices. */
|
|
tree = dm_tree_create ();
|
|
dmraid_check (tree, "dm_tree_create failed\n");
|
|
task = dm_task_create (DM_DEVICE_LIST);
|
|
dmraid_check (task, "dm_task_create failed\n");
|
|
dmraid_check (dm_task_run (task), "dm_task_run failed\n");
|
|
names = dm_task_get_names (task);
|
|
dmraid_check (names, "dm_task_get_names failed\n");
|
|
dmraid_check (names->dev, "No DM devices found\n");
|
|
do
|
|
{
|
|
names = (void *) names + next;
|
|
dmraid_check (dm_tree_add_dev (tree, MAJOR (names->dev),
|
|
MINOR (names->dev)),
|
|
"dm_tree_add_dev (%s) failed\n", names->name);
|
|
next = names->next;
|
|
}
|
|
while (next);
|
|
|
|
/* Walk the second-level children of the inverted tree; that is, devices
|
|
which are directly composed of non-DM devices such as hard disks.
|
|
This class includes all DM-RAID disks and excludes all DM-RAID
|
|
partitions. */
|
|
root = dm_tree_find_node (tree, 0, 0);
|
|
top_handle = NULL;
|
|
top = dm_tree_next_child (&top_handle, root, 1);
|
|
while (top)
|
|
{
|
|
second_handle = NULL;
|
|
second = dm_tree_next_child (&second_handle, top, 1);
|
|
while (second)
|
|
{
|
|
const char *node_name, *node_uuid;
|
|
char *name;
|
|
struct dmraid_seen *seen_elt;
|
|
|
|
node_name = dm_tree_node_get_name (second);
|
|
dmraid_check (node_name, "dm_tree_node_get_name failed\n");
|
|
node_uuid = dm_tree_node_get_uuid (second);
|
|
dmraid_check (node_uuid, "dm_tree_node_get_uuid failed\n");
|
|
if (strncmp (node_uuid, "DMRAID-", 7) != 0)
|
|
{
|
|
grub_dprintf ("deviceiter", "%s is not DM-RAID\n", node_name);
|
|
goto dmraid_next_child;
|
|
}
|
|
|
|
/* Have we already seen this node? There are typically very few
|
|
DM-RAID disks, so a list should be fast enough. */
|
|
if (grub_named_list_find (GRUB_AS_NAMED_LIST (seen), node_name))
|
|
{
|
|
grub_dprintf ("deviceiter", "Already seen DM device %s\n",
|
|
node_name);
|
|
goto dmraid_next_child;
|
|
}
|
|
|
|
name = xasprintf ("/dev/mapper/%s", node_name);
|
|
if (check_device (name))
|
|
{
|
|
if (hook (name, 0))
|
|
{
|
|
free (name);
|
|
while (seen)
|
|
{
|
|
struct dmraid_seen *seen_elt =
|
|
grub_list_pop (GRUB_AS_LIST_P (&seen));
|
|
free (seen_elt);
|
|
}
|
|
if (task)
|
|
dm_task_destroy (task);
|
|
if (tree)
|
|
dm_tree_free (tree);
|
|
return;
|
|
}
|
|
}
|
|
free (name);
|
|
|
|
seen_elt = xmalloc (sizeof *seen_elt);
|
|
seen_elt->name = node_name;
|
|
grub_list_push (GRUB_AS_LIST_P (&seen), GRUB_AS_LIST (seen_elt));
|
|
|
|
dmraid_next_child:
|
|
second = dm_tree_next_child (&second_handle, top, 1);
|
|
}
|
|
top = dm_tree_next_child (&top_handle, root, 1);
|
|
}
|
|
|
|
dmraid_end:
|
|
while (seen)
|
|
{
|
|
struct dmraid_seen *seen_elt = grub_list_pop (GRUB_AS_LIST_P (&seen));
|
|
free (seen_elt);
|
|
}
|
|
if (task)
|
|
dm_task_destroy (task);
|
|
if (tree)
|
|
dm_tree_free (tree);
|
|
}
|
|
# endif /* HAVE_DEVICE_MAPPER */
|
|
#endif /* __linux__ */
|
|
}
|
|
|