udf: convert macros related to bitmaps to functions
convert UDF_SB_ALLOC_BITMAP macro to udf_sb_alloc_bitmap function
convert UDF_SB_FREE_BITMAP macro to udf_sb_free_bitmap function
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Ben Fennema <bfennema@falcon.csc.calpoly.edu>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 913ece8..86aa223 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -937,6 +937,39 @@
root->logicalBlockNum, root->partitionReferenceNum);
}
+static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
+{
+ struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[index];
+ struct udf_bitmap *bitmap;
+ int nr_groups;
+ int size;
+
+ /* TODO: move calculating of nr_groups into helper function */
+ nr_groups = (map->s_partition_len +
+ (sizeof(struct spaceBitmapDesc) << 3) +
+ (sb->s_blocksize * 8) - 1) /
+ (sb->s_blocksize * 8);
+ size = sizeof(struct udf_bitmap) +
+ (sizeof(struct buffer_head *) * nr_groups);
+
+ if (size <= PAGE_SIZE)
+ bitmap = kmalloc(size, GFP_KERNEL);
+ else
+ bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
+
+ if (bitmap == NULL) {
+ udf_error(sb, __FUNCTION__,
+ "Unable to allocate space for bitmap "
+ "and %d buffer_head pointers", nr_groups);
+ return NULL;
+ }
+
+ memset(bitmap, 0x00, size);
+ bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
+ bitmap->s_nr_groups = nr_groups;
+ return bitmap;
+}
+
static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
{
struct partitionDesc *p;
@@ -987,7 +1020,7 @@
i, map->s_uspace.s_table->i_ino);
}
if (phd->unallocSpaceBitmap.extLength) {
- UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
+ map->s_uspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
if (map->s_uspace.s_bitmap != NULL) {
map->s_uspace.s_bitmap->s_extLength =
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
@@ -1017,7 +1050,7 @@
i, map->s_fspace.s_table->i_ino);
}
if (phd->freedSpaceBitmap.extLength) {
- UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
+ map->s_fspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
if (map->s_fspace.s_bitmap != NULL) {
map->s_fspace.s_bitmap->s_extLength =
le32_to_cpu(phd->freedSpaceBitmap.extLength);
@@ -1504,6 +1537,22 @@
}
}
+static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
+{
+ int i;
+ int nr_groups = bitmap->s_nr_groups;
+ int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);
+
+ for (i = 0; i < nr_groups; i++)
+ if (bitmap->s_block_bitmap[i])
+ brelse(bitmap->s_block_bitmap[i]);
+
+ if (size <= PAGE_SIZE)
+ kfree(bitmap);
+ else
+ vfree(bitmap);
+}
+
/*
* udf_read_super
*
@@ -1689,9 +1738,9 @@
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(sb, sbi->s_partition, s_uspace);
+ udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_fspace);
+ 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]);
@@ -1767,9 +1816,9 @@
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(sb, sbi->s_partition, s_uspace);
+ udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_fspace);
+ 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]);