static void udf_bitmap_free_blocks(struct super_block *sb,
struct inode *inode,
struct udf_bitmap *bitmap,
struct kernel_lb_addr *bloc,
uint32_t offset,
uint32_t count)
{
struct udf_sb_info *sbi = UDF_SB(sb);
struct buffer_head *bh = NULL;
struct udf_part_map *partmap;
unsigned long block;
unsigned long block_group;
unsigned long bit;
unsigned long i;
int bitmap_nr;
unsigned long overflow;
mutex_lock(&sbi->s_alloc_mutex);
partmap = &sbi->s_partmaps[bloc->partitionReferenceNum];
if (bloc->logicalBlockNum < 0 ||
(bloc->logicalBlockNum + count) >
partmap->s_partition_len) {
udf_debug("%d < %d || %d + %d > %d\n",
bloc->logicalBlockNum, 0, bloc->logicalBlockNum,
count, partmap->s_partition_len);
goto error_return;
}
block = bloc->logicalBlockNum + offset +
(sizeof(struct spaceBitmapDesc) << 3);
do {
overflow = 0;
block_group = block >> (sb->s_blocksize_bits + 3);
bit = block % (sb->s_blocksize << 3);
/*
* Check to see if we are freeing blocks across a group boundary.
*/
if (bit + count > (sb->s_blocksize << 3)) {
overflow = bit + count - (sb->s_blocksize << 3);
count -= overflow;
}
bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
if (bitmap_nr < 0)
goto error_return;
bh = bitmap->s_block_bitmap[bitmap_nr];
for (i = 0; i < count; i++) {
if (udf_set_bit(bit + i, bh->b_data)) {
udf_debug("bit %ld already set\n", bit + i);
udf_debug("byte=%2x\n",
((char *)bh->b_data)[(bit + i) >> 3]);
} else {
if (inode)
dquot_free_block(inode, 1);
udf_add_free_space(sb, sbi->s_partition, 1);
}
}
static void udf_bitmap_free_blocks(const struct inode * inode,
struct udf_bitmap *bitmap, lb_addr bloc, Uint32 offset, Uint32 count)
{
struct buffer_head * bh = NULL;
unsigned long block;
unsigned long block_group;
unsigned long bit;
unsigned long i;
int bitmap_nr;
unsigned long overflow;
struct super_block * sb;
sb = inode->i_sb;
if (!sb)
{
udf_debug("nonexistent device");
return;
}
lock_super(sb);
if (bloc.logicalBlockNum < 0 ||
(bloc.logicalBlockNum + count) > UDF_SB_PARTLEN(sb, bloc.partitionReferenceNum))
{
udf_debug("%d < %d || %d + %d > %d\n",
bloc.logicalBlockNum, 0, bloc.logicalBlockNum, count,
UDF_SB_PARTLEN(sb, bloc.partitionReferenceNum));
goto error_return;
}
block = bloc.logicalBlockNum + offset + (sizeof(struct SpaceBitmapDesc) << 3);
do_more:
overflow = 0;
block_group = block >> (sb->s_blocksize_bits + 3);
bit = block % (sb->s_blocksize << 3);
/*
* Check to see if we are freeing blocks across a group boundary.
*/
if (bit + count > (sb->s_blocksize << 3))
{
overflow = bit + count - (sb->s_blocksize << 3);
count -= overflow;
}
bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
if (bitmap_nr < 0)
goto error_return;
bh = bitmap->s_block_bitmap[bitmap_nr];
for (i=0; i < count; i++)
{
if (udf_set_bit(bit + i, bh->b_data))
{
udf_debug("bit %ld already set\n", bit + i);
udf_debug("byte=%2x\n", ((char *)bh->b_data)[(bit + i) >> 3]);
}
else
{