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osdep/linux/hostdisk: Modify sector by sysfs as disk sector

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The disk sector size provided by sysfs file system considers the sector
size of 512 irrespective of disk sector size, thus causing the read by
the GRUB to an incorrect offset from what was originally intended.

Considering the 512 sector size of sysfs data the actual sector needs to
be modified corresponding to disk sector size.

Signed-off-by: Mukesh Kumar Chaurasiya <mchauras@linux.vnet.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Mukesh Kumar Chaurasiya authored and Daniel Kiper committed 2023-02-14 16:01:17 +01:00
1 parent 53e0726285
commit f7564844f8
2 files changed
+11 -3
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grub-core/osdep/linux/hostdisk.c
+4 -3
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@@ -198,7 +198,8 @@ have_devfs (void)
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
static int
grub_hostdisk_linux_find_partition (char *dev, grub_disk_addr_t sector)
grub_hostdisk_linux_find_partition (const grub_disk_t disk, char *dev,
grub_disk_addr_t sector)
{
size_t len = strlen (dev);
const char *format;
@@ -263,7 +264,7 @@ grub_hostdisk_linux_find_partition (char *dev, grub_disk_addr_t sector)
if (fstat (fd, &st) < 0
|| !grub_util_device_is_mapped_stat (&st)
|| !grub_util_get_dm_node_linear_info (st.st_rdev, 0, 0, &start))
start = grub_util_find_partition_start_os (real_dev);
start = grub_disk_to_native_sector (disk, grub_util_find_partition_start_os (real_dev));
/* We don't care about errors here. */
grub_errno = GRUB_ERR_NONE;
@@ -344,7 +345,7 @@ grub_util_fd_open_device (const grub_disk_t disk, grub_disk_addr_t sector, int f
&& strncmp (dev, "/dev/", 5) == 0)
{
if (sector >= part_start)
is_partition = grub_hostdisk_linux_find_partition (dev, part_start);
is_partition = grub_hostdisk_linux_find_partition (disk, dev, part_start);
else
*max = part_start - sector;
}