/**
* ext4_free_blocks() -- Free given blocks and update quota
* @handle: handle for this transaction
* @inode: inode
* @block: start physical block to free
* @count: number of blocks to count
* @metadata: Are these metadata blocks
*/
void ext4_free_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count,
int metadata)
{
struct super_block *sb;
unsigned long dquot_freed_blocks;
/* this isn't the right place to decide whether block is metadata
* inode.c/extents.c knows better, but for safety ... */
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
metadata = 1;
/* We need to make sure we don't reuse
* block released untill the transaction commit.
* writeback mode have weak data consistency so
* don't force data as metadata when freeing block
* for writeback mode.
*/
if (metadata == 0 && !ext4_should_writeback_data(inode))
metadata = 1;
sb = inode->i_sb;
ext4_mb_free_blocks(handle, inode, block, count,
metadata, &dquot_freed_blocks);
if (dquot_freed_blocks)
vfs_dq_free_block(inode, dquot_freed_blocks);
return;
}
static void udf_bitmap_free_blocks(struct super_block *sb,
struct inode *inode,
struct udf_bitmap *bitmap,
kernel_lb_addr bloc, uint32_t offset,
uint32_t count)
{
struct udf_sb_info *sbi = UDF_SB(sb);
struct buffer_head *bh = NULL;
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);
if (bloc.logicalBlockNum < 0 ||
(bloc.logicalBlockNum + count) >
sbi->s_partmaps[bloc.partitionReferenceNum].s_partition_len) {
udf_debug("%d < %d || %d + %d > %d\n",
bloc.logicalBlockNum, 0, bloc.logicalBlockNum, count,
sbi->s_partmaps[bloc.partitionReferenceNum].
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)
vfs_dq_free_block(inode, 1);
udf_add_free_space(sbi, sbi->s_partition, 1);
}
}
