static int out(struct sm_metadata *smm)
{
int r = 0;
/*
* If we're not recursing then very bad things are happening.
*/
if (!smm->recursion_count) {
DMERR("lost track of recursion depth");
return -ENOMEM;
}
if (smm->recursion_count == 1) {
while (!brb_empty(&smm->uncommitted)) {
struct block_op bop;
r = brb_pop(&smm->uncommitted, &bop);
if (r) {
DMERR("bug in bop ring buffer");
break;
}
r = commit_bop(smm, &bop);
if (r)
break;
}
}
smm->recursion_count--;
return r;
}
static int brb_pop(struct bop_ring_buffer *brb)
{
if (brb_empty(brb))
return -ENODATA;
brb->begin = brb_next(brb, brb->begin);
return 0;
}
static int brb_peek(struct bop_ring_buffer *brb, struct block_op *result)
{
struct block_op *bop;
if (brb_empty(brb))
return -ENODATA;
bop = brb->bops + brb->begin;
result->type = bop->type;
result->block = bop->block;
return 0;
}
static int apply_bops(struct sm_metadata *smm)
{
int r = 0;
while (!brb_empty(&smm->uncommitted)) {
struct block_op bop;
r = brb_pop(&smm->uncommitted, &bop);
if (r) {
DMERR("bug in bop ring buffer");
break;
}
r = commit_bop(smm, &bop);
if (r)
break;
}
return r;
}
