redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

udf: Fix free space reporting for metadata and virtual partitions 

[ Upstream commit a4a8b99ec8 ]

Free space on filesystems with metadata or virtual partition maps
currently gets misreported. This is because these partitions are just
remapped onto underlying real partitions from which keep track of free
blocks. Take this remapping into account when counting free blocks as
well.

Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Reported-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Jan Kara 2020-01-07 16:36:49 +01:00 committed by Greg Kroah-Hartman
parent 03560e4a19
commit 6ceef50235
1 changed files with 17 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
fs/udf/super.c
View File

@ -2491,17 +2491,29 @@ static unsigned int udf_count_free_table(struct super_block *sb,
static unsigned int udf_count_free(struct super_block *sb)
{
unsigned int accum = 0;
struct udf_sb_info *sbi;
struct udf_sb_info *sbi = UDF_SB(sb);
struct udf_part_map *map;
unsigned int part = sbi->s_partition;
int ptype = sbi->s_partmaps[part].s_partition_type;
if (ptype == UDF_METADATA_MAP25) {
part = sbi->s_partmaps[part].s_type_specific.s_metadata.
s_phys_partition_ref;
} else if (ptype == UDF_VIRTUAL_MAP15 || ptype == UDF_VIRTUAL_MAP20) {
/*
* Filesystems with VAT are append-only and we cannot write to
* them. Let's just report 0 here.
*/
return 0;
}
sbi = UDF_SB(sb);
if (sbi->s_lvid_bh) {
struct logicalVolIntegrityDesc *lvid =
(struct logicalVolIntegrityDesc *)
sbi->s_lvid_bh->b_data;
if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
if (le32_to_cpu(lvid->numOfPartitions) > part) {
accum = le32_to_cpu(
lvid->freeSpaceTable[sbi->s_partition]);
lvid->freeSpaceTable[part]);
if (accum == 0xFFFFFFFF)
accum = 0;
}
@ -2510,7 +2522,7 @@ static unsigned int udf_count_free(struct super_block *sb)
if (accum)
return accum;
map = &sbi->s_partmaps[sbi->s_partition];
map = &sbi->s_partmaps[part];
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
accum += udf_count_free_bitmap(sb,
map->s_uspace.s_bitmap);