void
aoedev_downdev(struct aoedev *d)
{
struct aoetgt *t, **tt, **te;
struct list_head *head, *pos, *nx;
struct request *rq;
int i;
d->flags &= ~DEVFL_UP;
/* clean out active and to-be-retransmitted buffers */
for (i = 0; i < NFACTIVE; i++) {
head = &d->factive[i];
list_for_each_safe(pos, nx, head)
downdev_frame(pos);
}
head = &d->rexmitq;
list_for_each_safe(pos, nx, head)
downdev_frame(pos);
/* reset window dressings */
tt = d->targets;
te = tt + d->ntargets;
for (; tt < te && (t = *tt); tt++) {
aoecmd_wreset(t);
t->nout = 0;
}
/* clean out the in-process request (if any) */
aoe_failip(d);
/* fast fail all pending I/O */
if (d->blkq) {
while ((rq = blk_peek_request(d->blkq))) {
blk_start_request(rq);
aoe_end_request(d, rq, 1);
}
}
if (d->gd)
set_capacity(d->gd, 0);
}
static void
aoeblk_request(struct request_queue *q)
{
struct aoedev *d;
struct request *rq;
d = q->queuedata;
if ((d->flags & DEVFL_UP) == 0) {
printk(KERN_INFO "aoe: device %ld.%d is not up\n",
d->aoemajor, d->aoeminor);
while ((rq = blk_peek_request(q))) {
blk_start_request(rq);
aoe_end_request(d, rq, 1);
}
return;
}
aoecmd_work(d);
return;
}
static void
aoe_failip(struct aoedev *d)
{
struct request *rq;
struct bio *bio;
unsigned long n;
aoe_failbuf(d, d->ip.buf);
rq = d->ip.rq;
if (rq == NULL)
return;
while ((bio = d->ip.nxbio)) {
clear_bit(BIO_UPTODATE, &bio->bi_flags);
d->ip.nxbio = bio->bi_next;
n = (unsigned long) rq->special;
rq->special = (void *) --n;
}
if ((unsigned long) rq->special == 0)
aoe_end_request(d, rq, 0);
}
