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-rw-r--r--grub-core/osdep/linux/getroot.c1164
1 files changed, 1164 insertions, 0 deletions
diff --git a/grub-core/osdep/linux/getroot.c b/grub-core/osdep/linux/getroot.c
new file mode 100644
index 0000000..001b818
--- /dev/null
+++ b/grub-core/osdep/linux/getroot.c
@@ -0,0 +1,1164 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config-util.h>
+#include <config.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <dirent.h>
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#if defined(MAJOR_IN_MKDEV)
+#include <sys/mkdev.h>
+#elif defined(MAJOR_IN_SYSMACROS)
+#include <sys/sysmacros.h>
+#endif
+
+#include <grub/types.h>
+#include <sys/ioctl.h> /* ioctl */
+#include <sys/mount.h>
+
+#include <grub/util/misc.h>
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/emu/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/emu/getroot.h>
+
+#include <sys/wait.h>
+
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/raid/md_p.h>
+#include <linux/raid/md_u.h>
+#include <grub/i18n.h>
+#include <grub/emu/exec.h>
+#include <grub/btrfs.h>
+
+#define LVM_DEV_MAPPER_STRING "/dev/mapper/"
+
+/* Defines taken from btrfs/ioctl.h. */
+
+struct btrfs_ioctl_dev_info_args
+{
+ grub_uint64_t devid;
+ grub_uint8_t uuid[16];
+ grub_uint64_t bytes_used;
+ grub_uint64_t total_bytes;
+ grub_uint64_t unused[379];
+ grub_uint8_t path[1024];
+};
+
+struct btrfs_ioctl_fs_info_args
+{
+ grub_uint64_t max_id;
+ grub_uint64_t num_devices;
+ grub_uint8_t fsid[16];
+ grub_uint64_t reserved[124];
+};
+
+struct btrfs_ioctl_ino_lookup_args
+{
+ grub_uint64_t treeid;
+ grub_uint64_t objectid;
+ char name[4080];
+};
+
+struct btrfs_ioctl_search_key
+{
+ grub_uint64_t tree_id;
+ grub_uint64_t min_objectid;
+ grub_uint64_t max_objectid;
+ grub_uint64_t min_offset;
+ grub_uint64_t max_offset;
+ grub_uint64_t min_transid;
+ grub_uint64_t max_transid;
+ grub_uint32_t min_type;
+ grub_uint32_t max_type;
+ grub_uint32_t nr_items;
+ grub_uint32_t unused[9];
+};
+
+struct btrfs_ioctl_search_args {
+ struct btrfs_ioctl_search_key key;
+ grub_uint64_t buf[(4096 - sizeof(struct btrfs_ioctl_search_key))
+ / sizeof (grub_uint64_t)];
+};
+
+#define BTRFS_IOC_TREE_SEARCH _IOWR(0x94, 17, \
+ struct btrfs_ioctl_search_args)
+#define BTRFS_IOC_INO_LOOKUP _IOWR(0x94, 18, \
+ struct btrfs_ioctl_ino_lookup_args)
+#define BTRFS_IOC_DEV_INFO _IOWR(0x94, 30, \
+ struct btrfs_ioctl_dev_info_args)
+#define BTRFS_IOC_FS_INFO _IOR(0x94, 31, \
+ struct btrfs_ioctl_fs_info_args)
+
+static int
+grub_util_is_imsm (const char *os_dev);
+
+
+#define ESCAPED_PATH_MAX (4 * PATH_MAX)
+struct mountinfo_entry
+{
+ int id;
+ int major, minor;
+ char enc_root[ESCAPED_PATH_MAX + 1], enc_path[ESCAPED_PATH_MAX + 1];
+ char fstype[ESCAPED_PATH_MAX + 1], device[ESCAPED_PATH_MAX + 1];
+};
+
+static char **
+grub_util_raid_getmembers (const char *name, int bootable)
+{
+ int fd, ret, i, j;
+ char **devicelist;
+ mdu_version_t version;
+ mdu_array_info_t info;
+ mdu_disk_info_t disk;
+
+ fd = open (name, O_RDONLY);
+
+ if (fd == -1)
+ grub_util_error (_("cannot open `%s': %s"), name, strerror (errno));
+
+ ret = ioctl (fd, RAID_VERSION, &version);
+ if (ret != 0)
+ grub_util_error (_("ioctl RAID_VERSION error: %s"), strerror (errno));
+
+ if ((version.major != 0 || version.minor != 90)
+ && (version.major != 1 || version.minor != 0)
+ && (version.major != 1 || version.minor != 1)
+ && (version.major != 1 || version.minor != 2))
+ grub_util_error (_("unsupported RAID version: %d.%d"),
+ version.major, version.minor);
+
+ if (bootable && (version.major != 0 || version.minor != 90))
+ grub_util_error (_("unsupported RAID version: %d.%d"),
+ version.major, version.minor);
+
+ ret = ioctl (fd, GET_ARRAY_INFO, &info);
+ if (ret != 0)
+ grub_util_error (_("ioctl GET_ARRAY_INFO error: %s"), strerror (errno));
+
+ devicelist = xcalloc (info.nr_disks + 1, sizeof (char *));
+
+ for (i = 0, j = 0; j < info.nr_disks; i++)
+ {
+ disk.number = i;
+ ret = ioctl (fd, GET_DISK_INFO, &disk);
+ if (ret != 0)
+ grub_util_error (_("ioctl GET_DISK_INFO error: %s"), strerror (errno));
+
+ if (disk.state & (1 << MD_DISK_REMOVED))
+ continue;
+
+ if (disk.state & (1 << MD_DISK_ACTIVE))
+ devicelist[j] = grub_find_device (NULL,
+ makedev (disk.major, disk.minor));
+ else
+ devicelist[j] = NULL;
+ j++;
+ }
+
+ devicelist[j] = NULL;
+
+ close (fd);
+
+ return devicelist;
+}
+
+/* Statting something on a btrfs filesystem always returns a virtual device
+ major/minor pair rather than the real underlying device, because btrfs
+ can span multiple underlying devices (and even if it's currently only
+ using a single device it can be dynamically extended onto another). We
+ can't deal with the multiple-device case yet, but in the meantime, we can
+ at least cope with the single-device case by scanning
+ /proc/self/mountinfo. */
+static void
+unescape (char *str)
+{
+ char *optr;
+ const char *iptr;
+ for (iptr = optr = str; *iptr; optr++)
+ {
+ if (iptr[0] == '\\' && iptr[1] >= '0' && iptr[1] < '8'
+ && iptr[2] >= '0' && iptr[2] < '8'
+ && iptr[3] >= '0' && iptr[3] < '8')
+ {
+ *optr = (((iptr[1] - '0') << 6) | ((iptr[2] - '0') << 3)
+ | (iptr[3] - '0'));
+ iptr += 4;
+ }
+ else
+ *optr = *iptr++;
+ }
+ *optr = 0;
+}
+
+static char **
+grub_find_root_devices_from_btrfs (const char *dir)
+{
+ int fd;
+ struct btrfs_ioctl_fs_info_args fsi;
+ int i, j = 0;
+ char **ret;
+
+ fd = open (dir, 0);
+ if (fd < 0)
+ return NULL;
+
+ if (ioctl (fd, BTRFS_IOC_FS_INFO, &fsi) < 0)
+ {
+ close (fd);
+ return NULL;
+ }
+
+ ret = xcalloc (fsi.num_devices + 1, sizeof (ret[0]));
+
+ for (i = 1; i <= fsi.max_id && j < fsi.num_devices; i++)
+ {
+ struct btrfs_ioctl_dev_info_args devi;
+ memset (&devi, 0, sizeof (devi));
+ devi.devid = i;
+ if (ioctl (fd, BTRFS_IOC_DEV_INFO, &devi) < 0)
+ {
+ close (fd);
+ free (ret);
+ return NULL;
+ }
+ ret[j++] = xstrdup ((char *) devi.path);
+ if (j >= fsi.num_devices)
+ break;
+ }
+ close (fd);
+ ret[j] = 0;
+ return ret;
+}
+
+static char *
+get_btrfs_fs_prefix (const char *mount_path)
+{
+ struct btrfs_ioctl_ino_lookup_args args;
+ struct stat st;
+ int fd;
+ grub_uint64_t tree_id, inode_id;
+ char *ret = NULL;
+
+ fd = open (mount_path, O_RDONLY);
+
+ if (fd < 0)
+ return NULL;
+ memset (&args, 0, sizeof(args));
+ args.objectid = GRUB_BTRFS_TREE_ROOT_OBJECTID;
+
+ if (ioctl (fd, BTRFS_IOC_INO_LOOKUP, &args) < 0)
+ goto fail;
+ tree_id = args.treeid;
+
+ if (fstat (fd, &st) < 0)
+ goto fail;
+ inode_id = st.st_ino;
+
+ while (tree_id != GRUB_BTRFS_ROOT_VOL_OBJECTID
+ || inode_id != GRUB_BTRFS_TREE_ROOT_OBJECTID)
+ {
+ const char *name;
+ size_t namelen;
+ struct btrfs_ioctl_search_args sargs;
+ char *old;
+
+ memset (&sargs, 0, sizeof(sargs));
+
+ if (inode_id == GRUB_BTRFS_TREE_ROOT_OBJECTID)
+ {
+ struct grub_btrfs_root_backref *br;
+
+ sargs.key.tree_id = 1;
+ sargs.key.min_objectid = tree_id;
+ sargs.key.max_objectid = tree_id;
+
+ sargs.key.min_offset = 0;
+ sargs.key.max_offset = ~0ULL;
+ sargs.key.min_transid = 0;
+ sargs.key.max_transid = ~0ULL;
+ sargs.key.min_type = GRUB_BTRFS_ITEM_TYPE_ROOT_BACKREF;
+ sargs.key.max_type = GRUB_BTRFS_ITEM_TYPE_ROOT_BACKREF;
+
+ sargs.key.nr_items = 1;
+
+ if (ioctl (fd, BTRFS_IOC_TREE_SEARCH, &sargs) < 0)
+ goto fail;
+
+ if (sargs.key.nr_items == 0)
+ goto fail;
+
+ tree_id = sargs.buf[2];
+ br = (struct grub_btrfs_root_backref *) (sargs.buf + 4);
+ inode_id = grub_le_to_cpu64 (br->inode_id);
+ name = br->name;
+ namelen = grub_le_to_cpu16 (br->n);
+ }
+ else
+ {
+ struct grub_btrfs_inode_ref *ir;
+
+ sargs.key.tree_id = tree_id;
+ sargs.key.min_objectid = inode_id;
+ sargs.key.max_objectid = inode_id;
+
+ sargs.key.min_offset = 0;
+ sargs.key.max_offset = ~0ULL;
+ sargs.key.min_transid = 0;
+ sargs.key.max_transid = ~0ULL;
+ sargs.key.min_type = GRUB_BTRFS_ITEM_TYPE_INODE_REF;
+ sargs.key.max_type = GRUB_BTRFS_ITEM_TYPE_INODE_REF;
+
+ if (ioctl (fd, BTRFS_IOC_TREE_SEARCH, &sargs) < 0)
+ goto fail;
+
+ if (sargs.key.nr_items == 0)
+ goto fail;
+
+ inode_id = sargs.buf[2];
+
+ ir = (struct grub_btrfs_inode_ref *) (sargs.buf + 4);
+ name = ir->name;
+ namelen = grub_le_to_cpu16 (ir->n);
+ }
+ old = ret;
+ ret = xmalloc (namelen + (old ? strlen (old) : 0) + 2);
+ ret[0] = '/';
+ memcpy (ret + 1, name, namelen);
+ if (old)
+ {
+ strcpy (ret + 1 + namelen, old);
+ free (old);
+ }
+ else
+ ret[1+namelen] = '\0';
+ }
+ if (!ret)
+ ret = xstrdup ("/");
+ close (fd);
+ return ret;
+
+ fail:
+ free (ret);
+ close (fd);
+ return NULL;
+}
+
+
+char **
+grub_find_root_devices_from_mountinfo (const char *dir, char **relroot)
+{
+ FILE *fp = NULL;
+ char *buf = NULL;
+ size_t len = 0;
+ grub_size_t entry_len, entry_max = 4;
+ struct mountinfo_entry *entries;
+ struct mountinfo_entry parent_entry = { 0, 0, 0, "", "", "", "" };
+ int i;
+ int retry = 0;
+ int dir_fd = -1;
+ char **ret = NULL;
+
+ if (! *dir)
+ dir = "/";
+ if (relroot)
+ *relroot = NULL;
+
+ entries = xcalloc (entry_max, sizeof (*entries));
+
+again:
+ fp = grub_util_fopen ("/proc/self/mountinfo", "r");
+ if (! fp)
+ goto out; /* fall through to other methods */
+
+ entry_len = 0;
+
+ /* First, build a list of relevant visible mounts. */
+ while (getline (&buf, &len, fp) > 0)
+ {
+ struct mountinfo_entry entry;
+ int count;
+ size_t enc_path_len;
+ const char *sep;
+
+ if (sscanf (buf, "%d %d %u:%u %s %s%n",
+ &entry.id, &parent_entry.id, &entry.major, &entry.minor,
+ entry.enc_root, entry.enc_path, &count) < 6)
+ continue;
+
+ unescape (entry.enc_root);
+ unescape (entry.enc_path);
+
+ enc_path_len = strlen (entry.enc_path);
+ /* Check that enc_path is a prefix of dir. The prefix must either be
+ the entire string, or end with a slash, or be immediately followed
+ by a slash. */
+ if (strncmp (dir, entry.enc_path, enc_path_len) != 0 ||
+ (enc_path_len && dir[enc_path_len - 1] != '/' &&
+ dir[enc_path_len] && dir[enc_path_len] != '/'))
+ continue;
+
+ sep = strstr (buf + count, " - ");
+ if (!sep)
+ continue;
+
+ sep += sizeof (" - ") - 1;
+ if (sscanf (sep, "%s %s", entry.fstype, entry.device) != 2)
+ continue;
+
+ unescape (entry.device);
+
+ /* Using the mount IDs, find out where this fits in the list of
+ visible mount entries we've seen so far. There are three
+ interesting cases. Firstly, it may be inserted at the end: this is
+ the usual case of /foo/bar being mounted after /foo. Secondly, it
+ may be inserted at the start: for example, this can happen for
+ filesystems that are mounted before / and later moved under it.
+ Thirdly, it may occlude part or all of the existing filesystem
+ tree, in which case the end of the list needs to be pruned and this
+ new entry will be inserted at the end. */
+ if (entry_len >= entry_max)
+ {
+ entry_max <<= 1;
+ entries = xrealloc (entries, entry_max * sizeof (*entries));
+ }
+
+ if (!entry_len)
+ {
+ /* Initialise list. */
+ entry_len = 2;
+ entries[0] = parent_entry;
+ entries[1] = entry;
+ }
+ else
+ {
+ for (i = entry_len - 1; i >= 0; i--)
+ {
+ if (entries[i].id == parent_entry.id)
+ {
+ /* Insert at end, pruning anything previously above this. */
+ entry_len = i + 2;
+ entries[i + 1] = entry;
+ break;
+ }
+ else if (i == 0 && entries[i].id == entry.id)
+ {
+ /* Insert at start. */
+ entry_len++;
+ memmove (entries + 1, entries,
+ (entry_len - 1) * sizeof (*entries));
+ entries[0] = parent_entry;
+ entries[1] = entry;
+ break;
+ }
+ }
+ }
+ }
+
+ /* Now scan visible mounts for the ones we're interested in. */
+ for (i = entry_len - 1; i >= 0; i--)
+ {
+ char *fs_prefix = NULL;
+ if (!*entries[i].device)
+ continue;
+
+ if (grub_strcmp (entries[i].fstype, "fuse.zfs") == 0
+ || grub_strcmp (entries[i].fstype, "zfs") == 0)
+ {
+ char *slash;
+ slash = strchr (entries[i].device, '/');
+ if (slash)
+ *slash = 0;
+ ret = grub_util_find_root_devices_from_poolname (entries[i].device);
+ if (slash)
+ *slash = '/';
+ if (relroot)
+ {
+ if (!slash)
+ fs_prefix = xasprintf ("/@%s", entries[i].enc_root);
+ else if (strchr (slash + 1, '@'))
+ fs_prefix = xasprintf ("/%s%s", slash + 1, entries[i].enc_root);
+ else
+ fs_prefix = xasprintf ("/%s@%s", slash + 1,
+ entries[i].enc_root);
+ }
+ }
+ else if (grub_strcmp (entries[i].fstype, "btrfs") == 0)
+ {
+ ret = grub_find_root_devices_from_btrfs (dir);
+ fs_prefix = get_btrfs_fs_prefix (entries[i].enc_path);
+ }
+ else if (!retry && grub_strcmp (entries[i].fstype, "autofs") == 0)
+ {
+ /* If the best match is automounted, try to trigger mount. We cannot
+ simply return here because stat() on automounted directory does not
+ trigger mount and returns bogus (pseudo)device number instead.
+ We keep mountpoint open until end of scan to prevent timeout. */
+
+ int flags = O_RDONLY|O_DIRECTORY;
+
+ fclose (fp);
+#ifdef O_LARGEFILE
+ flags |= O_LARGEFILE;
+#endif
+ dir_fd = open (entries[i].enc_path, flags);
+ retry = 1;
+ goto again;
+ }
+ if (!ret)
+ {
+ ret = xmalloc (2 * sizeof (ret[0]));
+ ret[0] = strdup (entries[i].device);
+ ret[1] = 0;
+ }
+ if (!fs_prefix)
+ fs_prefix = entries[i].enc_root;
+ if (relroot)
+ {
+ char *ptr;
+ grub_size_t enc_root_len = strlen (fs_prefix);
+ grub_size_t enc_path_len = strlen (entries[i].enc_path);
+ grub_size_t dir_strlen = strlen (dir);
+ *relroot = xmalloc (enc_root_len +
+ 2 + dir_strlen);
+ ptr = grub_stpcpy (*relroot, fs_prefix);
+ if (dir_strlen > enc_path_len)
+ {
+ while (ptr > *relroot && *(ptr - 1) == '/')
+ ptr--;
+ if (dir[enc_path_len] != '/')
+ *ptr++ = '/';
+ ptr = grub_stpcpy (ptr, dir + enc_path_len);
+ }
+ *ptr = 0;
+ }
+ if (fs_prefix != entries[i].enc_root)
+ free (fs_prefix);
+ break;
+ }
+
+out:
+ free (buf);
+ free (entries);
+ if (fp)
+ fclose (fp);
+ if (dir_fd != -1)
+ close (dir_fd);
+ return ret;
+}
+
+static char *
+get_mdadm_uuid (const char *os_dev)
+{
+ const char *argv[5];
+ int fd;
+ pid_t pid;
+ FILE *mdadm;
+ char *buf = NULL;
+ size_t len = 0;
+ char *name = NULL;
+
+ argv[0] = "mdadm";
+ argv[1] = "--detail";
+ argv[2] = "--export";
+ argv[3] = os_dev;
+ argv[4] = NULL;
+
+ pid = grub_util_exec_pipe (argv, &fd);
+
+ if (!pid)
+ return NULL;
+
+ /* Parent. Read mdadm's output. */
+ mdadm = fdopen (fd, "r");
+ if (! mdadm)
+ {
+ grub_util_warn (_("Unable to open stream from %s: %s"),
+ "mdadm", strerror (errno));
+ goto out;
+ }
+
+ while (getline (&buf, &len, mdadm) > 0)
+ {
+ if (strncmp (buf, "MD_UUID=", sizeof ("MD_UUID=") - 1) == 0)
+ {
+ char *name_start, *ptri, *ptro;
+
+ free (name);
+ name_start = buf + sizeof ("MD_UUID=") - 1;
+ ptro = name = xmalloc (strlen (name_start) + 1);
+ for (ptri = name_start; *ptri && *ptri != '\n' && *ptri != '\r';
+ ptri++)
+ if ((*ptri >= '0' && *ptri <= '9')
+ || (*ptri >= 'a' && *ptri <= 'f')
+ || (*ptri >= 'A' && *ptri <= 'F'))
+ *ptro++ = *ptri;
+ *ptro = 0;
+ }
+ }
+
+out:
+ close (fd);
+ waitpid (pid, NULL, 0);
+ free (buf);
+
+ return name;
+}
+
+static int
+grub_util_is_imsm (const char *os_dev)
+{
+ int retry;
+ int is_imsm = 0;
+ int container_seen = 0;
+ const char *dev = os_dev;
+
+ do
+ {
+ const char *argv[5];
+ int fd;
+ pid_t pid;
+ FILE *mdadm;
+ char *buf = NULL;
+ size_t len = 0;
+
+ retry = 0; /* We'll do one more pass if device is part of container */
+
+ argv[0] = "mdadm";
+ argv[1] = "--detail";
+ argv[2] = "--export";
+ argv[3] = dev;
+ argv[4] = NULL;
+
+ pid = grub_util_exec_pipe (argv, &fd);
+
+ if (!pid)
+ {
+ if (dev != os_dev)
+ free ((void *) dev);
+ return 0;
+ }
+
+ /* Parent. Read mdadm's output. */
+ mdadm = fdopen (fd, "r");
+ if (! mdadm)
+ {
+ grub_util_warn (_("Unable to open stream from %s: %s"),
+ "mdadm", strerror (errno));
+ close (fd);
+ waitpid (pid, NULL, 0);
+ if (dev != os_dev)
+ free ((void *) dev);
+ return 0;
+ }
+
+ while (getline (&buf, &len, mdadm) > 0)
+ {
+ if (strncmp (buf, "MD_CONTAINER=", sizeof ("MD_CONTAINER=") - 1) == 0
+ && !container_seen)
+ {
+ char *newdev, *ptr;
+ newdev = xstrdup (buf + sizeof ("MD_CONTAINER=") - 1);
+ ptr = newdev + strlen (newdev) - 1;
+ for (; ptr >= newdev && (*ptr == '\n' || *ptr == '\r'); ptr--);
+ ptr[1] = 0;
+ grub_util_info ("Container of %s is %s", dev, newdev);
+ dev = newdev;
+ container_seen = retry = 1;
+ break;
+ }
+ if (strncmp (buf, "MD_METADATA=imsm",
+ sizeof ("MD_METADATA=imsm") - 1) == 0)
+ {
+ is_imsm = 1;
+ grub_util_info ("%s is imsm", dev);
+ break;
+ }
+ }
+
+ free (buf);
+ close (fd);
+ waitpid (pid, NULL, 0);
+ }
+ while (retry);
+
+ if (dev != os_dev)
+ free ((void *) dev);
+ return is_imsm;
+}
+
+char *
+grub_util_part_to_disk (const char *os_dev, struct stat *st,
+ int *is_part)
+{
+ char *path;
+
+ if (! S_ISBLK (st->st_mode))
+ {
+ *is_part = 0;
+ return xstrdup (os_dev);
+ }
+
+ path = xmalloc (PATH_MAX);
+
+ if (! realpath (os_dev, path))
+ return NULL;
+
+ if (strncmp ("/dev/", path, 5) == 0)
+ {
+ char *p = path + 5;
+
+ /* If this is an IDE disk. */
+ if (strncmp ("ide/", p, 4) == 0)
+ {
+ p = strstr (p, "part");
+ if (p)
+ {
+ *is_part = 1;
+ strcpy (p, "disc");
+ }
+
+ return path;
+ }
+
+ /* If this is a SCSI disk. */
+ if (strncmp ("scsi/", p, 5) == 0)
+ {
+ p = strstr (p, "part");
+ if (p)
+ {
+ *is_part = 1;
+ strcpy (p, "disc");
+ }
+
+ return path;
+ }
+
+ /* If this is a DAC960 disk. */
+ if (strncmp ("rd/c", p, 4) == 0)
+ {
+ /* /dev/rd/c[0-9]+d[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+
+ /* If this is a Mylex AcceleRAID Array. */
+ if (strncmp ("rs/c", p, 4) == 0)
+ {
+ /* /dev/rd/c[0-9]+d[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+ /* If this is a CCISS disk. */
+ if (strncmp ("cciss/c", p, sizeof ("cciss/c") - 1) == 0)
+ {
+ /* /dev/cciss/c[0-9]+d[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+
+ /* If this is an AOE disk. */
+ if (strncmp ("etherd/e", p, sizeof ("etherd/e") - 1) == 0)
+ {
+ /* /dev/etherd/e[0-9]+\.[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+
+ /* If this is a Compaq Intelligent Drive Array. */
+ if (strncmp ("ida/c", p, sizeof ("ida/c") - 1) == 0)
+ {
+ /* /dev/ida/c[0-9]+d[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+
+ /* If this is an I2O disk. */
+ if (strncmp ("i2o/hd", p, sizeof ("i2o/hd") - 1) == 0)
+ {
+ /* /dev/i2o/hd[a-z]([0-9]+)? */
+ if (p[sizeof ("i2o/hda") - 1])
+ *is_part = 1;
+ p[sizeof ("i2o/hda") - 1] = '\0';
+ return path;
+ }
+
+ /* If this is a MultiMediaCard (MMC). */
+ if (strncmp ("mmcblk", p, sizeof ("mmcblk") - 1) == 0)
+ {
+ /* /dev/mmcblk[0-9]+(p[0-9]+)? */
+ p = strchr (p, 'p');
+ if (p)
+ {
+ *is_part = 1;
+ *p = '\0';
+ }
+
+ return path;
+ }
+
+ if (strncmp ("md", p, 2) == 0
+ && p[2] >= '0' && p[2] <= '9')
+ {
+ char *ptr = p + 2;
+ while (*ptr >= '0' && *ptr <= '9')
+ ptr++;
+ if (*ptr)
+ *is_part = 1;
+ *ptr = 0;
+ return path;
+ }
+
+ if (strncmp ("nbd", p, 3) == 0
+ && p[3] >= '0' && p[3] <= '9')
+ {
+ char *ptr = p + 3;
+ while (*ptr >= '0' && *ptr <= '9')
+ ptr++;
+ if (*ptr)
+ *is_part = 1;
+ *ptr = 0;
+ return path;
+ }
+
+ /* If this is an IDE, SCSI or Virtio disk. */
+ if (strncmp ("vdisk", p, 5) == 0
+ && p[5] >= 'a' && p[5] <= 'z')
+ {
+ /* /dev/vdisk[a-z][0-9]* */
+ if (p[6])
+ *is_part = 1;
+ p[6] = '\0';
+ return path;
+ }
+ if ((strncmp ("hd", p, 2) == 0
+ || strncmp ("vd", p, 2) == 0
+ || strncmp ("sd", p, 2) == 0)
+ && p[2] >= 'a' && p[2] <= 'z')
+ {
+ char *pp = p + 2;
+ while (*pp >= 'a' && *pp <= 'z')
+ pp++;
+ if (*pp)
+ *is_part = 1;
+ /* /dev/[hsv]d[a-z]+[0-9]* */
+ *pp = '\0';
+ return path;
+ }
+
+ /* If this is a Xen virtual block device. */
+ if ((strncmp ("xvd", p, 3) == 0) && p[3] >= 'a' && p[3] <= 'z')
+ {
+ char *pp = p + 3;
+ while (*pp >= 'a' && *pp <= 'z')
+ pp++;
+ if (*pp)
+ *is_part = 1;
+ /* /dev/xvd[a-z]+[0-9]* */
+ *pp = '\0';
+ return path;
+ }
+
+ /* If this is an rssd device. */
+ if ((strncmp ("rssd", p, 4) == 0) && p[4] >= 'a' && p[4] <= 'z')
+ {
+ char *pp = p + 4;
+ while (*pp >= 'a' && *pp <= 'z')
+ pp++;
+ if (*pp)
+ *is_part = 1;
+ /* /dev/rssd[a-z]+[0-9]* */
+ *pp = '\0';
+ return path;
+ }
+
+ /* If this is a loop device */
+ if ((strncmp ("loop", p, 4) == 0) && p[4] >= '0' && p[4] <= '9')
+ {
+ char *pp = p + 4;
+ while (*pp >= '0' && *pp <= '9')
+ pp++;
+ if (*pp == 'p')
+ *is_part = 1;
+ /* /dev/loop[0-9]+p[0-9]* */
+ *pp = '\0';
+ return path;
+ }
+
+ /* If this is a NVMe device */
+ if ((strncmp ("nvme", p, 4) == 0) && p[4] >= '0' && p[4] <= '9')
+ {
+ char *pp = p + 4;
+ while (*pp >= '0' && *pp <= '9')
+ pp++;
+ if (*pp == 'n')
+ pp++;
+ while (*pp >= '0' && *pp <= '9')
+ pp++;
+ if (*pp == 'p')
+ *is_part = 1;
+ /* /dev/nvme[0-9]+n[0-9]+p[0-9]* */
+ *pp = '\0';
+ return path;
+ }
+ }
+
+ return path;
+}
+
+static char *
+grub_util_get_raid_grub_dev (const char *os_dev)
+{
+ char *grub_dev = NULL;
+ if (os_dev[7] == '_' && os_dev[8] == 'd')
+ {
+ /* This a partitionable RAID device of the form /dev/md_dNNpMM. */
+
+ char *p, *q;
+
+ p = strdup (os_dev + sizeof ("/dev/md_d") - 1);
+
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ grub_dev = xasprintf ("md%s", p);
+ free (p);
+ }
+ else if (os_dev[7] == '/' && os_dev[8] == 'd')
+ {
+ /* This a partitionable RAID device of the form /dev/md/dNNpMM. */
+
+ char *p, *q;
+
+ p = strdup (os_dev + sizeof ("/dev/md/d") - 1);
+
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ grub_dev = xasprintf ("md%s", p);
+ free (p);
+ }
+ else if (os_dev[7] >= '0' && os_dev[7] <= '9')
+ {
+ char *p , *q;
+
+ p = strdup (os_dev + sizeof ("/dev/md") - 1);
+
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ grub_dev = xasprintf ("md%s", p);
+ free (p);
+ }
+ else if (os_dev[7] == '/' && os_dev[8] >= '0' && os_dev[8] <= '9')
+ {
+ char *p , *q;
+
+ p = strdup (os_dev + sizeof ("/dev/md/") - 1);
+
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ grub_dev = xasprintf ("md%s", p);
+ free (p);
+ }
+ else if (os_dev[7] == '/')
+ {
+ /* mdraid 1.x with a free name. */
+ char *p , *q;
+
+ p = strdup (os_dev + sizeof ("/dev/md/") - 1);
+
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ grub_dev = xasprintf ("md/%s", p);
+ free (p);
+ }
+ else
+ grub_util_error (_("unknown kind of RAID device `%s'"), os_dev);
+
+ {
+ char *mdadm_name = get_mdadm_uuid (os_dev);
+
+ if (mdadm_name)
+ {
+ const char *q;
+
+ for (q = os_dev + strlen (os_dev) - 1; q >= os_dev
+ && grub_isdigit (*q); q--);
+
+ if (q >= os_dev && *q == 'p')
+ {
+ free (grub_dev);
+ grub_dev = xasprintf ("mduuid/%s,%s", mdadm_name, q + 1);
+ goto done;
+ }
+ free (grub_dev);
+ grub_dev = xasprintf ("mduuid/%s", mdadm_name);
+
+ done:
+ free (mdadm_name);
+ }
+ }
+ return grub_dev;
+}
+
+enum grub_dev_abstraction_types
+grub_util_get_dev_abstraction_os (const char *os_dev)
+{
+#ifndef HAVE_DEVICE_MAPPER
+ if ((strncmp ("/dev/mapper/", os_dev, 12) == 0))
+ return GRUB_DEV_ABSTRACTION_LVM;
+#endif
+
+ /* Check for RAID. */
+ if (!strncmp (os_dev, "/dev/md", 7) && ! grub_util_device_is_mapped (os_dev)
+ && !grub_util_is_imsm (os_dev))
+ return GRUB_DEV_ABSTRACTION_RAID;
+ return GRUB_DEV_ABSTRACTION_NONE;
+}
+
+int
+grub_util_pull_device_os (const char *os_dev,
+ enum grub_dev_abstraction_types ab)
+{
+ switch (ab)
+ {
+ case GRUB_DEV_ABSTRACTION_RAID:
+ {
+ char **devicelist = grub_util_raid_getmembers (os_dev, 0);
+ int i;
+ for (i = 0; devicelist[i];i++)
+ {
+ grub_util_pull_device (devicelist[i]);
+ free (devicelist[i]);
+ }
+ free (devicelist);
+ }
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+char *
+grub_util_get_grub_dev_os (const char *os_dev)
+{
+ char *grub_dev = NULL;
+
+ switch (grub_util_get_dev_abstraction (os_dev))
+ {
+ /* Fallback for non-devmapper build. In devmapper-builds LVM is handled
+ in grub_util_get_devmapper_grub_dev and this point isn't reached.
+ */
+ case GRUB_DEV_ABSTRACTION_LVM:
+ {
+ unsigned short len;
+ grub_size_t offset = sizeof (LVM_DEV_MAPPER_STRING) - 1;
+
+ len = strlen (os_dev) - offset + 1;
+ grub_dev = xmalloc (len + sizeof ("lvm/"));
+
+ grub_memcpy (grub_dev, "lvm/", sizeof ("lvm/") - 1);
+ grub_memcpy (grub_dev + sizeof ("lvm/") - 1, os_dev + offset, len);
+ }
+ break;
+
+ case GRUB_DEV_ABSTRACTION_RAID:
+ grub_dev = grub_util_get_raid_grub_dev (os_dev);
+ break;
+
+ default: /* GRUB_DEV_ABSTRACTION_NONE */
+ break;
+ }
+
+ return grub_dev;
+}
+
+char *
+grub_make_system_path_relative_to_its_root_os (const char *path)
+{
+ char *bind = NULL;
+ grub_size_t len;
+ grub_free (grub_find_root_devices_from_mountinfo (path, &bind));
+ if (bind && bind[0])
+ {
+ len = strlen (bind);
+ while (len > 0 && bind[len - 1] == '/')
+ {
+ bind[len - 1] = '\0';
+ len--;
+ }
+ return bind;
+ }
+ grub_free (bind);
+ return NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 22:58:17 +0000