pull-in emu-lite branch
This commit is contained in:
BVK Chaitanya
commit
692d7c2855
120 changed files with 3842 additions and 13152 deletions
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@ -98,6 +98,10 @@ struct hd_geometry
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# include <sys/disk.h>
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#endif
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#ifdef HAVE_DEVICE_MAPPER
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# include <libdevmapper.h>
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#endif
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#if defined(__NetBSD__)
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# include <sys/ioctl.h>
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# include <sys/disklabel.h> /* struct disklabel */
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@ -312,6 +316,138 @@ grub_util_biosdisk_open (const char *name, grub_disk_t disk)
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return GRUB_ERR_NONE;
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}
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#ifdef HAVE_DEVICE_MAPPER
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static int
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device_is_mapped (const char *dev)
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{
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struct stat st;
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if (stat (dev, &st) < 0)
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return 0;
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return dm_is_dm_major (major (st.st_rdev));
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}
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#endif /* HAVE_DEVICE_MAPPER */
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#if defined(__linux__) || defined(__CYGWIN__) || defined(__NetBSD__)
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static grub_disk_addr_t
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find_partition_start (const char *dev)
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{
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int fd;
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# if !defined(__NetBSD__)
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struct hd_geometry hdg;
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# else /* defined(__NetBSD__) */
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struct disklabel label;
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int index;
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# endif /* !defined(__NetBSD__) */
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# ifdef HAVE_DEVICE_MAPPER
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if (device_is_mapped (dev)) {
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struct dm_task *task = NULL;
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grub_uint64_t start, length;
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char *target_type, *params, *space;
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grub_disk_addr_t partition_start;
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/* If any device-mapper operation fails, we fall back silently to
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HDIO_GETGEO. */
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task = dm_task_create (DM_DEVICE_TABLE);
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if (! task)
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{
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grub_dprintf ("hostdisk", "dm_task_create failed\n");
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goto devmapper_fail;
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}
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if (! dm_task_set_name (task, dev))
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{
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grub_dprintf ("hostdisk", "dm_task_set_name failed\n");
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goto devmapper_fail;
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}
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if (! dm_task_run (task))
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{
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grub_dprintf ("hostdisk", "dm_task_run failed\n");
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goto devmapper_fail;
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}
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dm_get_next_target (task, NULL, &start, &length, &target_type, ¶ms);
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if (! target_type)
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{
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grub_dprintf ("hostdisk", "no dm target\n");
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goto devmapper_fail;
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}
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if (strcmp (target_type, "linear") != 0)
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{
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grub_dprintf ("hostdisk", "ignoring dm target %s (not linear)\n",
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target_type);
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goto devmapper_fail;
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}
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if (! params)
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{
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grub_dprintf ("hostdisk", "no dm params\n");
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goto devmapper_fail;
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}
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/* The params string for a linear target looks like this:
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DEVICE-NAME START-SECTOR
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Parse this out. */
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space = strchr (params, ' ');
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if (! space)
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goto devmapper_fail;
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errno = 0;
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partition_start = strtoull (space + 1, NULL, 10);
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if (errno == 0)
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{
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grub_dprintf ("hostdisk", "dm %s starts at %llu\n",
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dev, (unsigned long long) partition_start);
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dm_task_destroy (task);
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return partition_start;
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}
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devmapper_fail:
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if (task)
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dm_task_destroy (task);
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}
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# endif /* HAVE_DEVICE_MAPPER */
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fd = open (dev, O_RDONLY);
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if (fd == -1)
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{
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grub_error (GRUB_ERR_BAD_DEVICE,
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"cannot open `%s' while attempting to get disk geometry", dev);
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return 0;
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}
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# if !defined(__NetBSD__)
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if (ioctl (fd, HDIO_GETGEO, &hdg))
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# else /* defined(__NetBSD__) */
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configure_device_driver (fd);
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if (ioctl (fd, DIOCGDINFO, &label) == -1)
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# endif /* !defined(__NetBSD__) */
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{
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grub_error (GRUB_ERR_BAD_DEVICE,
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"cannot get disk geometry of `%s'", dev);
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close (fd);
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return 0;
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}
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close (fd);
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# if !defined(__NetBSD__)
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return hdg.start;
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# else /* defined(__NetBSD__) */
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index = dev[strlen(dev) - 1] - 'a';
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if (index >= label.d_npartitions)
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{
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grub_error (GRUB_ERR_BAD_DEVICE,
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"no disk label entry for `%s'", dev);
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return 0;
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}
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return (grub_disk_addr_t) label.d_partitions[index].p_offset;
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# endif /* !defined(__NetBSD__) */
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}
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#endif /* __linux__ || __CYGWIN__ */
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#ifdef __linux__
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/* Cache of partition start sectors for each disk. */
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struct linux_partition_cache
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@ -365,28 +501,26 @@ linux_find_partition (char *dev, unsigned long sector)
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for (i = 1; i < 10000; i++)
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{
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int fd;
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struct hd_geometry hdg;
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grub_disk_addr_t start;
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sprintf (p, format, i);
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fd = open (real_dev, O_RDONLY);
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if (fd == -1)
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return 0;
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if (ioctl (fd, HDIO_GETGEO, &hdg))
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{
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close (fd);
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return 0;
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}
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close (fd);
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if (hdg.start == sector)
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start = find_partition_start (real_dev);
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/* We don't care about errors here. */
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grub_errno = GRUB_ERR_NONE;
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if (start == sector)
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{
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struct linux_partition_cache *new_cache_item;
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new_cache_item = xmalloc (sizeof *new_cache_item);
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new_cache_item->dev = xstrdup (dev);
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new_cache_item->start = hdg.start;
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new_cache_item->start = start;
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new_cache_item->partno = i;
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grub_list_push (GRUB_AS_LIST_P (&linux_partition_cache_list),
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GRUB_AS_LIST (new_cache_item));
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@ -877,7 +1011,7 @@ make_device_name (int drive, int dos_part, int bsd_part)
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}
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static char *
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convert_system_partition_to_system_disk (const char *os_dev)
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convert_system_partition_to_system_disk (const char *os_dev, struct stat *st)
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{
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#if defined(__linux__)
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char *path = xmalloc (PATH_MAX);
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@ -995,6 +1129,96 @@ convert_system_partition_to_system_disk (const char *os_dev)
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p[4] = '\0';
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return path;
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}
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#ifdef HAVE_DEVICE_MAPPER
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/* If this is a DM-RAID device. */
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if ((strncmp ("mapper/", p, 7) == 0))
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{
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static struct dm_tree *tree = NULL;
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uint32_t maj, min;
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struct dm_tree_node *node, *child;
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void *handle;
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const char *node_uuid, *mapper_name, *child_uuid, *child_name;
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if (! tree)
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tree = dm_tree_create ();
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if (! tree)
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{
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grub_dprintf ("hostdisk", "dm_tree_create failed\n");
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return NULL;
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}
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maj = major (st->st_rdev);
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min = minor (st->st_rdev);
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if (! dm_tree_add_dev (tree, maj, min))
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{
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grub_dprintf ("hostdisk", "dm_tree_add_dev failed\n");
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return NULL;
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}
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node = dm_tree_find_node (tree, maj, min);
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if (! node)
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{
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grub_dprintf ("hostdisk", "dm_tree_find_node failed\n");
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return NULL;
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}
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node_uuid = dm_tree_node_get_uuid (node);
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if (! node_uuid)
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{
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grub_dprintf ("hostdisk", "%s has no DM uuid\n", path);
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return NULL;
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}
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else if (strncmp (node_uuid, "DMRAID-", 7) != 0)
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{
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grub_dprintf ("hostdisk", "%s is not DM-RAID\n", path);
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return NULL;
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}
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handle = NULL;
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mapper_name = NULL;
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/* Counter-intuitively, device-mapper refers to the disk-like
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device containing a DM-RAID partition device as a "child" of
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the partition device. */
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child = dm_tree_next_child (&handle, node, 0);
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if (! child)
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{
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grub_dprintf ("hostdisk", "%s has no DM children\n", path);
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goto devmapper_out;
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}
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child_uuid = dm_tree_node_get_uuid (child);
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if (! child_uuid)
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{
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grub_dprintf ("hostdisk", "%s child has no DM uuid\n", path);
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goto devmapper_out;
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}
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else if (strncmp (child_uuid, "DMRAID-", 7) != 0)
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{
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grub_dprintf ("hostdisk", "%s child is not DM-RAID\n", path);
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goto devmapper_out;
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}
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child_name = dm_tree_node_get_name (child);
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if (! child_name)
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{
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grub_dprintf ("hostdisk", "%s child has no DM name\n", path);
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goto devmapper_out;
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}
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mapper_name = child_name;
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devmapper_out:
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if (! mapper_name)
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{
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/* This is a DM-RAID disk, not a partition. */
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mapper_name = dm_tree_node_get_name (node);
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if (! mapper_name)
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{
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grub_dprintf ("hostdisk", "%s has no DM name\n", path);
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return NULL;
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}
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}
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return xasprintf ("/dev/mapper/%s", mapper_name);
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}
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#endif /* HAVE_DEVICE_MAPPER */
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}
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return path;
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@ -1091,12 +1315,12 @@ device_is_wholedisk (const char *os_dev)
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#endif /* defined(__NetBSD__) */
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static int
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find_system_device (const char *os_dev)
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find_system_device (const char *os_dev, struct stat *st)
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{
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unsigned int i;
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char *os_disk;
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os_disk = convert_system_partition_to_system_disk (os_dev);
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os_disk = convert_system_partition_to_system_disk (os_dev, st);
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if (! os_disk)
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return -1;
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@ -1130,7 +1354,7 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
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return 0;
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}
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drive = find_system_device (os_dev);
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drive = find_system_device (os_dev, &st);
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if (drive < 0)
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{
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grub_error (GRUB_ERR_UNKNOWN_DEVICE,
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@ -1138,8 +1362,8 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
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return 0;
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}
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if (grub_strcmp (os_dev, convert_system_partition_to_system_disk (os_dev))
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== 0)
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if (grub_strcmp (os_dev,
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convert_system_partition_to_system_disk (os_dev, &st)) == 0)
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return make_device_name (drive, -1, -1);
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__NetBSD__)
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@ -1164,15 +1388,7 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
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{
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char *name;
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grub_disk_t disk;
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int fd;
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# if !defined(__NetBSD__)
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struct hd_geometry hdg;
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typeof (hdg.start) p_offset;
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# else /* defined(__NetBSD__) */
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struct disklabel label;
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int index;
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u_int32_t p_offset;
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# endif /* !defined(__NetBSD__) */
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grub_disk_addr_t start;
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int dos_part = -1;
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int bsd_part = -1;
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auto int find_partition (grub_disk_t dsk,
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@ -1187,7 +1403,7 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
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part_start = grub_partition_get_start (partition);
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if (p_offset == part_start)
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if (start == part_start)
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{
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if (partition->parent)
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{
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@ -1215,49 +1431,18 @@ grub_util_biosdisk_get_grub_dev (const char *os_dev)
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/* Since os_dev and convert_system_partition_to_system_disk (os_dev) are
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* different, we know that os_dev is of the form /dev/r[wsc]d[0-9]+[a-z]
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* and in particular it cannot be a floppy device. */
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index = os_dev[strlen(os_dev) - 1] - 'a';
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# endif /* !defined(__NetBSD__) */
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fd = open (os_dev, O_RDONLY);
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if (fd == -1)
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start = find_partition_start (os_dev);
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if (grub_errno != GRUB_ERR_NONE)
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{
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grub_error (GRUB_ERR_BAD_DEVICE, "cannot open `%s' while attempting to get disk geometry", os_dev);
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free (name);
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return 0;
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}
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# if !defined(__NetBSD__)
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if (ioctl (fd, HDIO_GETGEO, &hdg))
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# else /* defined(__NetBSD__) */
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configure_device_driver (fd);
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if (ioctl (fd, DIOCGDINFO, &label) == -1)
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# endif /* !defined(__NetBSD__) */
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{
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grub_error (GRUB_ERR_BAD_DEVICE,
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"cannot get disk geometry of `%s'", os_dev);
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close (fd);
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free (name);
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return 0;
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}
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grub_util_info ("%s starts from %lu", os_dev, start);
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close (fd);
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# if !defined(__NetBSD__)
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p_offset = hdg.start;
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# else /* defined(__NetBSD__) */
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if (index >= label.d_npartitions)
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{
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grub_error (GRUB_ERR_BAD_DEVICE,
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"no disk label entry for `%s'", os_dev);
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free (name);
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return 0;
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}
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p_offset = label.d_partitions[index].p_offset;
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# endif /* !defined(__NetBSD__) */
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grub_util_info ("%s starts from %lu", os_dev, p_offset);
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if (p_offset == 0 && device_is_wholedisk (os_dev))
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if (start == 0 && device_is_wholedisk (os_dev))
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return name;
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grub_util_info ("opening the device %s", name);
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|
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