From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/osdep/linux/getroot.c | 1164 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 1164 insertions(+) create mode 100644 grub-core/osdep/linux/getroot.c (limited to 'grub-core/osdep/linux/getroot.c') 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 . + */ + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef HAVE_LIMITS_H +#include +#endif + +#if defined(MAJOR_IN_MKDEV) +#include +#elif defined(MAJOR_IN_SYSMACROS) +#include +#endif + +#include +#include /* ioctl */ +#include + +#include + +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include +#include +#include + +#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; +} -- cgit v1.2.3