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Support BtrFS embedding.

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* grub-core/fs/btrfs.c (grub_btrfs_embed) [GRUB_UTIL]: New function.
	(grub_btrfs_fs) [GRUB_UTIL]: Set embed.
	* include/grub/fs.h (grub_fs) [GRUB_UTIL]: New field embed.
	* util/grub-setup.c (setup): Use fs embedding if available.
	Add additional sanity check.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-11-05 14:47:25 +01:00
parent 455377d93d
commit c7ba4f6984
4 changed files with 74 additions and 7 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2011-11-05 Vladimir Serbinenko <phcoder@gmail.com>
Support BtrFS embedding.
* grub-core/fs/btrfs.c (grub_btrfs_embed) [GRUB_UTIL]: New function.
(grub_btrfs_fs) [GRUB_UTIL]: Set embed.
* include/grub/fs.h (grub_fs) [GRUB_UTIL]: New field embed.
* util/grub-setup.c (setup): Use fs embedding if available.
Add additional sanity check.
2011-11-05 Vladimir Serbinenko <phcoder@gmail.com>
* util/grub-install.in: Fix condition for config_opt.

30
grub-core/fs/btrfs.c
View file

@ -1596,6 +1596,35 @@ grub_btrfs_label (grub_device_t device, char **label)
return grub_errno;
}
#ifdef GRUB_UTIL
static grub_err_t
grub_btrfs_embed (grub_device_t device __attribute__ ((unused)),
unsigned int *nsectors,
grub_embed_type_t embed_type,
grub_disk_addr_t **sectors)
{
unsigned i;
if (embed_type != GRUB_EMBED_PCBIOS)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"BtrFS curently supports only PC-BIOS embedding");
if (64 * 2 - 1 < *nsectors)
return grub_error (GRUB_ERR_OUT_OF_RANGE,
"Your core.img is unusually large. "
"It won't fit in the embedding area.");
*nsectors = 64 * 2 - 1;
*sectors = grub_malloc (*nsectors * sizeof (**sectors));
if (!*sectors)
return grub_errno;
for (i = 0; i < *nsectors; i++)
(*sectors)[i] = i + 1;
return GRUB_ERR_NONE;
}
#endif
static struct grub_fs grub_btrfs_fs = {
.name = "btrfs",
.dir = grub_btrfs_dir,
@ -1605,6 +1634,7 @@ static struct grub_fs grub_btrfs_fs = {
.uuid = grub_btrfs_uuid,
.label = grub_btrfs_label,
#ifdef GRUB_UTIL
.embed = grub_btrfs_embed,
.reserved_first_sector = 1,
#endif
};

9
include/grub/fs.h
View file

@ -25,6 +25,10 @@
#include <grub/types.h>
#include <grub/list.h>
/* For embedding types. */
#ifdef GRUB_UTIL
#include <grub/partition.h>
#endif
/* Forward declaration is required, because of mutual reference. */
struct grub_file;
@ -74,6 +78,11 @@ struct grub_fs
grub_err_t (*mtime) (grub_device_t device, grub_int32_t *timebuf);
#ifdef GRUB_UTIL
/* Determine sectors available for embedding. */
grub_err_t (*embed) (grub_device_t device, unsigned int *nsectors,
grub_embed_type_t embed_type,
grub_disk_addr_t **sectors);
/* Whether this filesystem reserves first sector for DOS-style boot. */
int reserved_first_sector;
#endif

32
util/grub-setup.c
View file

@ -408,29 +408,44 @@ setup (const char *dir,
free (tmp_img);
if (! dest_partmap)
if (! dest_partmap && ! fs)
{
grub_util_warn (_("Attempting to install GRUB to a partitionless disk or to a partition. This is a BAD idea."));
goto unable_to_embed;
}
if (multiple_partmaps || fs)
if (multiple_partmaps || (dest_partmap && fs))
{
grub_util_warn (_("Attempting to install GRUB to a disk with multiple partition labels or both partition label and filesystem. This is not supported yet."));
goto unable_to_embed;
}
if (!dest_partmap->embed)
if (dest_partmap && !dest_partmap->embed)
{
grub_util_warn ("Partition style '%s' doesn't support embeding",
dest_partmap->name);
goto unable_to_embed;
}
if (fs && !fs->embed)
{
grub_util_warn ("File system '%s' doesn't support embeding",
fs->name);
goto unable_to_embed;
}
nsec = core_sectors;
err = dest_partmap->embed (dest_dev->disk, &nsec,
GRUB_EMBED_PCBIOS, &sectors);
if (nsec > 2 * core_sectors)
nsec = 2 * core_sectors;
if (dest_partmap)
err = dest_partmap->embed (dest_dev->disk, &nsec,
GRUB_EMBED_PCBIOS, &sectors);
else
err = fs->embed (dest_dev, &nsec,
GRUB_EMBED_PCBIOS, &sectors);
if (!err && nsec < core_sectors)
{
err = grub_error (GRUB_ERR_OUT_OF_RANGE,
"Your embedding area is unusually small. "
"core.img won't fit in it.");
}
if (err)
{
@ -439,6 +454,9 @@ setup (const char *dir,
goto unable_to_embed;
}
if (nsec > 2 * core_sectors)
nsec = 2 * core_sectors;
/* Clean out the blocklists. */
block = first_block;
while (block->len)