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* grub-core/disk/efi/efidisk.c (grub_efidisk_get_device_name):

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Handle CD-ROMs.
This commit is contained in:
Andrey Borzenkov 2013-10-14 17:06:39 +02:00 committed by Vladimir 'phcoder' Serbinenko
parent 6de9ee86bf
commit 44016e527a
2 changed files with 75 additions and 62 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2013-10-14 Andrey Borzenkov <arvidjaar@gmail.com>
* grub-core/disk/efi/efidisk.c (grub_efidisk_get_device_name):
Handle CD-ROMs.
2013-10-14 Vladimir Serbinenko <phcoder@gmail.com>
Pass-through unknown E820 types. It required reorganisation of mmap

132
grub-core/disk/efi/efidisk.c
View file

@ -799,72 +799,80 @@ grub_efidisk_get_device_name (grub_efi_handle_t *handle)
if (! ldp)
return 0;
if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE
&& (GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp)
== GRUB_EFI_HARD_DRIVE_DEVICE_PATH_SUBTYPE))
if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) == GRUB_EFI_MEDIA_DEVICE_PATH_TYPE)
{
struct grub_efidisk_get_device_name_ctx ctx;
char *dev_name;
grub_efi_device_path_t *dup_dp, *dup_ldp;
grub_disk_t parent = 0;
int is_cdrom = 0;
switch (GRUB_EFI_DEVICE_PATH_SUBTYPE (ldp))
{
case GRUB_EFI_CDROM_DEVICE_PATH_SUBTYPE:
is_cdrom = 1;
/* Intentionally fall through */
case GRUB_EFI_HARD_DRIVE_DEVICE_PATH_SUBTYPE:
{
struct grub_efidisk_get_device_name_ctx ctx;
char *dev_name;
grub_efi_device_path_t *dup_dp, *dup_ldp;
grub_disk_t parent = 0;
/* It is necessary to duplicate the device path so that GRUB
can overwrite it. */
dup_dp = duplicate_device_path (dp);
if (! dup_dp)
return 0;
dup_ldp = find_last_device_path (dup_dp);
dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
dup_ldp->length[0] = sizeof (*dup_ldp);
dup_ldp->length[1] = 0;
if (!get_diskname_from_path (dup_dp, device_name))
{
grub_free (dup_dp);
return 0;
}
parent = grub_disk_open (device_name);
grub_free (dup_dp);
if (! parent)
return 0;
/* Find a partition which matches the hard drive device path. */
ctx.partition_name = NULL;
grub_memcpy (&ctx.hd, ldp, sizeof (ctx.hd));
if (ctx.hd.partition_start == 0
&& (ctx.hd.partition_size << (parent->log_sector_size
- GRUB_DISK_SECTOR_BITS))
== grub_disk_get_size (parent))
{
dev_name = grub_strdup (parent->name);
}
else
{
grub_partition_iterate (parent, grub_efidisk_get_device_name_iter,
&ctx);
if (! ctx.partition_name)
{
grub_disk_close (parent);
/* It is necessary to duplicate the device path so that GRUB
can overwrite it. */
dup_dp = duplicate_device_path (dp);
if (! dup_dp)
return 0;
}
dev_name = grub_xasprintf ("%s,%s", parent->name,
ctx.partition_name);
grub_free (ctx.partition_name);
}
grub_disk_close (parent);
dup_ldp = find_last_device_path (dup_dp);
dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
dup_ldp->length[0] = sizeof (*dup_ldp);
dup_ldp->length[1] = 0;
return dev_name;
}
else
{
/* This should be an entire disk. */
if (!get_diskname_from_path (dp, device_name))
return 0;
return grub_strdup (device_name);
if (!get_diskname_from_path (dup_dp, device_name))
{
grub_free (dup_dp);
return 0;
}
parent = grub_disk_open (device_name);
grub_free (dup_dp);
if (! parent)
return 0;
/* Find a partition which matches the hard drive device path. */
ctx.partition_name = NULL;
grub_memcpy (&ctx.hd, ldp, sizeof (ctx.hd));
if (ctx.hd.partition_start == 0
&& (ctx.hd.partition_size << (parent->log_sector_size
- GRUB_DISK_SECTOR_BITS))
== grub_disk_get_size (parent))
{
dev_name = grub_strdup (parent->name);
}
else
{
grub_partition_iterate (parent, grub_efidisk_get_device_name_iter,
&ctx);
if (! ctx.partition_name)
{
grub_disk_close (parent);
if (is_cdrom)
return grub_strdup (device_name);
return 0;
}
dev_name = grub_xasprintf ("%s,%s", parent->name,
ctx.partition_name);
grub_free (ctx.partition_name);
}
grub_disk_close (parent);
return dev_name;
}
}
}
/* This may be guessed device - floppy, cdrom or entire disk. */
if (!get_diskname_from_path (dp, device_name))
return 0;
return grub_strdup (device_name);
}