static void __kaio_queue_fsync_req(struct ploop_request * preq, int prio)
{
struct ploop_device * plo = preq->plo;
struct ploop_delta * delta = ploop_top_delta(plo);
struct ploop_io * io = &delta->io;
if (prio)
list_add(&preq->list, &io->fsync_queue);
else
list_add_tail(&preq->list, &io->fsync_queue);
io->fsync_qlen++;
if (waitqueue_active(&io->fsync_waitq))
wake_up_interruptible(&io->fsync_waitq);
}
static void resubmit(struct ploop_request * preq)
{
struct ploop_delta * delta = ploop_top_delta(preq->plo);
unsigned long sec;
switch (preq->eng_state) {
case PLOOP_E_INDEX_WB:
delta = map_writable_delta(preq);
map_index(delta, preq, &sec);
nfsio_write_page(&delta->io, preq,
preq->sinfo.wi.tpage,
sec, 0);
break;
case PLOOP_E_DATA_WBI:
if (preq->aux_bio) {
struct bio_list tbl;
tbl.head = tbl.tail = preq->aux_bio;
nfsio_submit_write_pad(&delta->io, preq, &tbl,
preq->iblock, 1<<preq->plo->cluster_log);
} else {
nfsio_submit_write_pad(&delta->io, preq, &preq->bl,
preq->iblock, preq->req_size);
}
break;
case PLOOP_E_COMPLETE:
case PLOOP_E_RELOC_NULLIFY:
if (preq->aux_bio) {
struct bio_list tbl;
tbl.head = tbl.tail = preq->aux_bio;
nfsio_submit_write(&delta->io, preq, &tbl,
preq->iblock, 1<<preq->plo->cluster_log);
} else {
nfsio_submit_write(&delta->io, preq, &preq->bl,
preq->iblock, preq->req_size);
}
break;
default:
printk("Resubmit bad state %lu\n\n", preq->eng_state);
BUG();
}
}
/* returns non-zero if and only if preq was resubmitted */
static int kaio_resubmit(struct ploop_request * preq)
{
struct ploop_delta * delta = ploop_top_delta(preq->plo);
switch (preq->eng_state) {
case PLOOP_E_ENTRY:
return 0;
case PLOOP_E_COMPLETE:
case PLOOP_E_RELOC_NULLIFY:
case PLOOP_E_DATA_WBI:
if (preq->aux_bio) {
struct bio_list tbl;
tbl.head = tbl.tail = preq->aux_bio;
kaio_submit(&delta->io, preq, preq->req_rw, &tbl,
preq->iblock, 1<<preq->plo->cluster_log);
} else {
kaio_submit(&delta->io, preq, preq->req_rw, &preq->bl,
preq->iblock, preq->req_size);
}
break;
case PLOOP_E_TRANS_DELTA_READ:
/* BUG_ON below guarantees that 'case PLOOP_E_DELTA_COPIED'
* is equivalent to the part of 'case PLOOP_E_TRANS_DELTA_READ'
* after bio_bcopy(). This is not trivial. */
BUG_ON(!test_bit(PLOOP_REQ_TRANS, &preq->state));
/* Fall through ... */
case PLOOP_E_DELTA_READ:
preq->eng_state = PLOOP_E_DELTA_COPIED; /* skip bcopy() */
return 0;
default:
printk("Resubmit bad state %lu\n", preq->eng_state);
BUG();
}
return 1;
}
