[3/4] udf: Drop freed bitmap / table support
diff mbox series

Message ID 20180906161821.11603-4-jack@suse.cz
State New
Headers show
Series
  • udf: Fix crash during mount
Related show

Commit Message

Jan Kara Sept. 6, 2018, 4:18 p.m. UTC
We don't support Free Space Table and Free Space Bitmap as specified by
UDF standard for writing as we don't support erasing blocks before
overwriting them. Just drop the handling of these structures as
partition descriptor checking code already makes sure such filesystems
can be mounted only read-only.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/udf/balloc.c | 24 ------------------------
 fs/udf/super.c  | 44 --------------------------------------------
 fs/udf/udf_sb.h |  6 ------
 3 files changed, 74 deletions(-)

Patch
diff mbox series

diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
index fcda0fc97b90..377b5d596aee 100644
--- a/fs/udf/balloc.c
+++ b/fs/udf/balloc.c
@@ -652,12 +652,6 @@  void udf_free_blocks(struct super_block *sb, struct inode *inode,
 	} else if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
 		udf_table_free_blocks(sb, map->s_uspace.s_table,
 				      bloc, offset, count);
-	} else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
-		udf_bitmap_free_blocks(sb, map->s_fspace.s_bitmap,
-				       bloc, offset, count);
-	} else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
-		udf_table_free_blocks(sb, map->s_fspace.s_table,
-				      bloc, offset, count);
 	}
 
 	if (inode) {
@@ -684,16 +678,6 @@  inline int udf_prealloc_blocks(struct super_block *sb,
 						      map->s_uspace.s_table,
 						      partition, first_block,
 						      block_count);
-	else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
-		allocated = udf_bitmap_prealloc_blocks(sb,
-						       map->s_fspace.s_bitmap,
-						       partition, first_block,
-						       block_count);
-	else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
-		allocated = udf_table_prealloc_blocks(sb,
-						      map->s_fspace.s_table,
-						      partition, first_block,
-						      block_count);
 	else
 		return 0;
 
@@ -717,14 +701,6 @@  inline udf_pblk_t udf_new_block(struct super_block *sb,
 		block = udf_table_new_block(sb,
 					    map->s_uspace.s_table,
 					    partition, goal, err);
-	else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
-		block = udf_bitmap_new_block(sb,
-					     map->s_fspace.s_bitmap,
-					     partition, goal, err);
-	else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
-		block = udf_table_new_block(sb,
-					    map->s_fspace.s_table,
-					    partition, goal, err);
 	else {
 		*err = -EIO;
 		return 0;
diff --git a/fs/udf/super.c b/fs/udf/super.c
index be934bcfa24b..8f2f56d9a1bb 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -290,12 +290,8 @@  static void udf_free_partition(struct udf_part_map *map)
 
 	if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
 		iput(map->s_uspace.s_table);
-	if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
-		iput(map->s_fspace.s_table);
 	if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
 		udf_sb_free_bitmap(map->s_uspace.s_bitmap);
-	if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
-		udf_sb_free_bitmap(map->s_fspace.s_bitmap);
 	if (map->s_partition_type == UDF_SPARABLE_MAP15)
 		for (i = 0; i < 4; i++)
 			brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
@@ -1105,37 +1101,6 @@  static int udf_fill_partdesc_info(struct super_block *sb,
 			  p_index, bitmap->s_extPosition);
 	}
 
-	if (phd->freedSpaceTable.extLength) {
-		struct kernel_lb_addr loc = {
-			.logicalBlockNum = le32_to_cpu(
-				phd->freedSpaceTable.extPosition),
-			.partitionReferenceNum = p_index,
-		};
-		struct inode *inode;
-
-		inode = udf_iget_special(sb, &loc);
-		if (IS_ERR(inode)) {
-			udf_debug("cannot load freedSpaceTable (part %d)\n",
-				  p_index);
-			return PTR_ERR(inode);
-		}
-		map->s_fspace.s_table = inode;
-		map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
-		udf_debug("freedSpaceTable (part %d) @ %lu\n",
-			  p_index, map->s_fspace.s_table->i_ino);
-	}
-
-	if (phd->freedSpaceBitmap.extLength) {
-		struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
-		if (!bitmap)
-			return -ENOMEM;
-		map->s_fspace.s_bitmap = bitmap;
-		bitmap->s_extPosition = le32_to_cpu(
-				phd->freedSpaceBitmap.extPosition);
-		map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
-		udf_debug("freedSpaceBitmap (part %d) @ %u\n",
-			  p_index, bitmap->s_extPosition);
-	}
 	return 0;
 }
 
@@ -2490,10 +2455,6 @@  static unsigned int udf_count_free(struct super_block *sb)
 		accum += udf_count_free_bitmap(sb,
 					       map->s_uspace.s_bitmap);
 	}
-	if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
-		accum += udf_count_free_bitmap(sb,
-					       map->s_fspace.s_bitmap);
-	}
 	if (accum)
 		return accum;
 
@@ -2501,11 +2462,6 @@  static unsigned int udf_count_free(struct super_block *sb)
 		accum += udf_count_free_table(sb,
 					      map->s_uspace.s_table);
 	}
-	if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
-		accum += udf_count_free_table(sb,
-					      map->s_fspace.s_table);
-	}
-
 	return accum;
 }
 
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index d12e507e9eb2..937c209474cd 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -35,8 +35,6 @@ 
 
 #define UDF_PART_FLAG_UNALLOC_BITMAP	0x0001
 #define UDF_PART_FLAG_UNALLOC_TABLE	0x0002
-#define UDF_PART_FLAG_FREED_BITMAP	0x0004
-#define UDF_PART_FLAG_FREED_TABLE	0x0008
 #define UDF_PART_FLAG_READ_ONLY		0x0010
 #define UDF_PART_FLAG_WRITE_ONCE	0x0020
 #define UDF_PART_FLAG_REWRITABLE	0x0040
@@ -95,10 +93,6 @@  struct udf_part_map {
 		struct udf_bitmap	*s_bitmap;
 		struct inode		*s_table;
 	} s_uspace;
-	union {
-		struct udf_bitmap	*s_bitmap;
-		struct inode		*s_table;
-	} s_fspace;
 	__u32	s_partition_root;
 	__u32	s_partition_len;
 	__u16	s_partition_type;