errcode_t ea_refcount_fetch(ext2_refcount_t refcount, ea_key_t ea_key,
ea_value_t *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, ea_key, 0);
if (!el) {
*ret = 0;
return 0;
}
*ret = el->ea_value;
return 0;
}
errcode_t ea_refcount_store(ext2_refcount_t refcount, blk_t blk, int count)
{
struct ea_refcount_el *el;
/*
* Get the refcount element
*/
el = get_refcount_el(refcount, blk, count ? 1 : 0);
if (!el)
return count ? EXT2_ET_NO_MEMORY : 0;
el->ea_count = count;
return 0;
}
errcode_t ea_refcount_increment(ext2_refcount_t refcount, blk_t blk, int *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, blk, 1);
if (!el)
return EXT2_ET_NO_MEMORY;
el->ea_count++;
if (ret)
*ret = el->ea_count;
return 0;
}
errcode_t ea_refcount_fetch(ext2_refcount_t refcount, blk_t blk,
int *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, blk, 0);
if (!el) {
*ret = 0;
return 0;
}
*ret = el->ea_count;
return 0;
}
errcode_t ea_refcount_store(ext2_refcount_t refcount, ea_key_t ea_key,
ea_value_t ea_value)
{
struct ea_refcount_el *el;
/*
* Get the refcount element
*/
el = get_refcount_el(refcount, ea_key, ea_value ? 1 : 0);
if (!el)
return ea_value ? EXT2_ET_NO_MEMORY : 0;
el->ea_value = ea_value;
return 0;
}
errcode_t ea_refcount_increment(ext2_refcount_t refcount, ea_key_t ea_key,
ea_value_t *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, ea_key, 1);
if (!el)
return EXT2_ET_NO_MEMORY;
el->ea_value++;
if (ret)
*ret = el->ea_value;
return 0;
}
errcode_t ea_refcount_decrement(ext2_refcount_t refcount, blk_t blk, int *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, blk, 0);
if (!el || el->ea_count == 0)
return EXT2_ET_INVALID_ARGUMENT;
el->ea_count--;
if (ret)
*ret = el->ea_count;
return 0;
}
errcode_t ea_refcount_decrement(ext2_refcount_t refcount, ea_key_t ea_key,
ea_value_t *ret)
{
struct ea_refcount_el *el;
el = get_refcount_el(refcount, ea_key, 0);
if (!el || el->ea_value == 0)
return EXT2_ET_INVALID_ARGUMENT;
el->ea_value--;
if (ret)
*ret = el->ea_value;
return 0;
}