/*
* Resize the cluster's physical storage allocation in-place. This may
* replace the cluster's chains.
*/
void
hammer2_cluster_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
hammer2_cluster_t *cparent, hammer2_cluster_t *cluster,
int nradix, int flags)
{
int i;
KKASSERT(cparent->pmp == cluster->pmp); /* can be NULL */
KKASSERT(cparent->nchains == cluster->nchains);
cluster->focus = NULL;
for (i = 0; i < cluster->nchains; ++i) {
if (cluster->array[i]) {
KKASSERT(cparent->array[i]);
hammer2_chain_resize(trans, ip,
cparent->array[i],
&cluster->array[i],
nradix, flags);
if (cluster->focus == NULL)
cluster->focus = cluster->array[i];
}
}
}
/*
* cparent is locked exclusively, with an extra ref, cluster is not locked.
* Replace element [i] in the cluster.
*/
static
int
hammer2_sync_replace(hammer2_thread_t *thr,
hammer2_chain_t *parent, hammer2_chain_t *chain,
hammer2_tid_t mtid, int idx,
hammer2_chain_t *focus)
{
int nradix;
uint8_t otype;
#if HAMMER2_THREAD_DEBUG
if (hammer2_debug & 1)
kprintf("replace rec %p slave %d %d.%016jx mod=%016jx\n",
chain,
idx,
focus->bref.type, focus->bref.key, mtid);
#endif
hammer2_chain_unlock(chain);
hammer2_chain_lock(chain, HAMMER2_RESOLVE_ALWAYS);
if (chain->bytes != focus->bytes) {
/* XXX what if compressed? */
nradix = hammer2_getradix(chain->bytes);
hammer2_chain_resize(NULL, parent, chain,
mtid, nradix, 0);
}
hammer2_chain_modify(chain, mtid, 0);
otype = chain->bref.type;
chain->bref.type = focus->bref.type;
chain->bref.methods = focus->bref.methods;
chain->bref.keybits = focus->bref.keybits;
chain->bref.vradix = focus->bref.vradix;
/* mirror_tid updated by flush */
KKASSERT(chain->bref.modify_tid == mtid);
chain->bref.flags = focus->bref.flags;
/* key already present */
/* check code will be recalculated */
chain->error = 0;
/*
* Copy data body.
*/
switch(chain->bref.type) {
case HAMMER2_BREF_TYPE_INODE:
if ((focus->data->ipdata.meta.op_flags &
HAMMER2_OPFLAG_DIRECTDATA) == 0) {
/*
* If DIRECTDATA is transitioning to 0 or the old
* chain is not an inode we have to initialize
* the block table.
*/
if (otype != HAMMER2_BREF_TYPE_INODE ||
(chain->data->ipdata.meta.op_flags &
HAMMER2_OPFLAG_DIRECTDATA)) {
kprintf("chain inode trans away from dd\n");
bzero(&chain->data->ipdata.u,
sizeof(chain->data->ipdata.u));
}
bcopy(focus->data, chain->data,
offsetof(hammer2_inode_data_t, u));
/* XXX setcheck on inode should not be needed */
hammer2_chain_setcheck(chain, chain->data);
break;
}
/* fall through */
case HAMMER2_BREF_TYPE_DATA:
bcopy(focus->data, chain->data, chain->bytes);
hammer2_chain_setcheck(chain, chain->data);
break;
default:
KKASSERT(0);
break;
}
hammer2_chain_unlock(chain);
hammer2_chain_lock(chain, HAMMER2_RESOLVE_SHARED |
HAMMER2_RESOLVE_MAYBE);
return 0;
}
