static void node_mark_dirty(Oc_wu *wu_p,
Oc_bpt_node *node_p,
bool multi_refs)
{
if (!multi_refs) {
uint64 new_addr;
Oc_bpt_test_node *tnode_p;
/* Try to emulate what the mark-dirty operation actually does.
* Move the page from its current disk-address to a new one.
*
* There is one exception: never move the root node.
*/
if (oc_bpt_nd_is_root(NULL, node_p))
return;
if (1) {
if (oc_bpt_test_utl_random_number(4) != 0)
return;
// This is a non-root node, move it
new_addr = oc_bpt_test_fs_alloc();
oc_bpt_test_fs_dealloc(node_p->disk_addr);
tnode_p = vd_node_lookup(node_p->disk_addr);
vd_node_remove(node_p->disk_addr);
node_p->disk_addr = new_addr;
vd_node_insert(tnode_p);
}
}
else {
/* This page is referenced by multiple clones. We
* can't move it; we need to leave the old page where
* it was.
*/
Oc_bpt_test_node *tnode_p, *old_tnode_p;;
tnode_p = vd_node_lookup(node_p->disk_addr);
old_tnode_p = tnode_clone(tnode_p);
// move the page to a new address
vd_node_remove(tnode_p->node.disk_addr);
tnode_p->node.disk_addr = oc_bpt_test_fs_alloc();
vd_node_insert(tnode_p);
// Place a copy of the page in the old disk-address
vd_node_insert(old_tnode_p);
// reduce the FS ref-count on the old address.
oc_bpt_test_fs_dealloc(old_tnode_p->node.disk_addr);
}
}
void oc_xt_test_nd_mark_dirty(Oc_wu *wu_p, Oc_xt_node *node_p)
{
Oc_xt_test_node *tnode_p;
uint64 new_addr;
if (random_choose(4) != 0)
return;
/* Try to emulate what the mark-dirty operation actually does.
* Move the page from its current disk-address to a new one.
*
* There is one exception: never move the root node.
*/
if (oc_xt_nd_is_root(NULL, node_p))
return;
// This is a non-root node, move it
new_addr = fs_alloc();
// printf("po_id=%d, moving address %Lu->%Lu\n", wu_p->po_id, node_p->lba, new_addr);
// fflush(stdout);
tnode_p = vd_node_lookup(node_p->disk_addr);
vd_node_remove(node_p->disk_addr);
node_p->disk_addr = new_addr;
vd_node_insert(tnode_p);
}
void oc_xt_test_nd_dealloc(Oc_wu *wu_p, uint64 addr)
{
Oc_xt_test_node *tnode_p;
char *data;
if (wu_p->po_id != 0)
if (random_choose(2) == 0)
oc_crt_yield_task();
// extract the node fromt the table prior to removal
tnode_p = vd_node_lookup(addr);
// remove the node from the virtual-disk
vd_node_remove(addr);
oc_utl_assert(tnode_p);
oc_utl_assert(tnode_p->node.data);
oc_utl_assert(tnode_p->magic == MAGIC);
// mess up the node so that errors will occur on illegal accesses
tnode_p->magic = -1;
data = tnode_p->node.data;
tnode_p->node.data = NULL;
tnode_p->node.lock.counter = 100;
tnode_p->node.disk_addr = 0;
free(data);
free(tnode_p);
}
static void node_dealloc(Oc_wu *wu_p, uint64 addr)
{
if (wu_p->po_id != 0)
if (oc_bpt_test_utl_random_number(2) == 0)
oc_crt_yield_task();
oc_bpt_test_fs_dealloc(addr);
if (oc_bpt_test_fs_get_refcount(wu_p, addr) == 0)
{
// Free the block only if it's ref-count is zero
Oc_bpt_test_node *tnode_p;
char *data;
// extract the node from the table prior to removal
tnode_p = vd_node_lookup(addr);
// remove the node from the virtual-disk
vd_node_remove(addr);
oc_utl_assert(tnode_p);
oc_utl_assert(tnode_p->node.data);
oc_utl_assert(tnode_p->magic == MAGIC);
// mess up the node so that errors will occur on illegal accesses
tnode_p->magic = -1;
data = tnode_p->node.data;
tnode_p->node.data = NULL;
tnode_p->node.disk_addr = 0;
free(data);
free(tnode_p);
}
}
