static int comp_refs(struct btrfs_delayed_ref_node *ref1,
struct btrfs_delayed_ref_node *ref2,
bool check_seq)
{
int ret = 0;
if (ref1->type < ref2->type)
return -1;
if (ref1->type > ref2->type)
return 1;
if (ref1->type == BTRFS_TREE_BLOCK_REF_KEY ||
ref1->type == BTRFS_SHARED_BLOCK_REF_KEY)
ret = comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref1),
btrfs_delayed_node_to_tree_ref(ref2));
else
ret = comp_data_refs(btrfs_delayed_node_to_data_ref(ref1),
btrfs_delayed_node_to_data_ref(ref2));
if (ret)
return ret;
if (check_seq) {
if (ref1->seq < ref2->seq)
return -1;
if (ref1->seq > ref2->seq)
return 1;
}
return 0;
}
/*
* entries in the rb tree are ordered by the byte number of the extent,
* type of the delayed backrefs and content of delayed backrefs.
*/
static int comp_entry(struct btrfs_delayed_ref_node *ref2,
struct btrfs_delayed_ref_node *ref1)
{
if (ref1->bytenr < ref2->bytenr)
return -1;
if (ref1->bytenr > ref2->bytenr)
return 1;
if (ref1->is_head && ref2->is_head)
return 0;
if (ref2->is_head)
return -1;
if (ref1->is_head)
return 1;
if (ref1->type < ref2->type)
return -1;
if (ref1->type > ref2->type)
return 1;
if (ref1->type == BTRFS_TREE_BLOCK_REF_KEY ||
ref1->type == BTRFS_SHARED_BLOCK_REF_KEY) {
return comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref2),
btrfs_delayed_node_to_tree_ref(ref1));
} else if (ref1->type == BTRFS_EXTENT_DATA_REF_KEY ||
ref1->type == BTRFS_SHARED_DATA_REF_KEY) {
return comp_data_refs(btrfs_delayed_node_to_data_ref(ref2),
btrfs_delayed_node_to_data_ref(ref1));
}
BUG();
return 0;
}
/*
* entries in the rb tree are ordered by the byte number of the extent,
* type of the delayed backrefs and content of delayed backrefs.
*/
static int comp_entry(struct btrfs_delayed_ref_node *ref2,
struct btrfs_delayed_ref_node *ref1,
bool compare_seq)
{
if (ref1->bytenr < ref2->bytenr)
return -1;
if (ref1->bytenr > ref2->bytenr)
return 1;
if (ref1->is_head && ref2->is_head)
return 0;
if (ref2->is_head)
return -1;
if (ref1->is_head)
return 1;
if (ref1->type < ref2->type)
return -1;
if (ref1->type > ref2->type)
return 1;
/* merging of sequenced refs is not allowed */
if (compare_seq) {
if (ref1->seq < ref2->seq)
return -1;
if (ref1->seq > ref2->seq)
return 1;
}
if (ref1->type == BTRFS_TREE_BLOCK_REF_KEY ||
ref1->type == BTRFS_SHARED_BLOCK_REF_KEY) {
return comp_tree_refs(btrfs_delayed_node_to_tree_ref(ref2),
btrfs_delayed_node_to_tree_ref(ref1),
ref1->type);
} else if (ref1->type == BTRFS_EXTENT_DATA_REF_KEY ||
ref1->type == BTRFS_SHARED_DATA_REF_KEY) {
return comp_data_refs(btrfs_delayed_node_to_data_ref(ref2),
btrfs_delayed_node_to_data_ref(ref1));
}
BUG();
return 0;
}
