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udf: convert macros related to bitmaps to functions

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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>
This commit is contained in:
Marcin Slusarz
2008-02-08 04:20:33 -08:00
committed by Linus Torvalds
parent deae6cfcdc
commit 66e1da3f47
2 changed files with 55 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
fs/udf/super.c
View File

@ -937,6 +937,39 @@ static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
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 @@ static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
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 @@ static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
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_close_lvid(struct super_block *sb)
}
}
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 @@ error_out:
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 @@ static void udf_put_super(struct super_block *sb)
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]);