luck/tmp_suning_uos_patched
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aoe: replace ->special use with private data in the request

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Makes the code a whole lot easier to read.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-11-10 09:30:47 +01:00 committed by Jens Axboe
parent 1bee42438f
commit 61e7712e25
4 changed files with 20 additions and 23 deletions
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4
drivers/block/aoe/aoe.h
View File

@ -100,6 +100,10 @@ enum {
MAX_TAINT = 1000, /* cap on aoetgt taint */
};
struct aoe_req {
unsigned long nr_bios;
};
struct buf {
ulong nframesout;
struct bio *bio;

1
drivers/block/aoe/aoeblk.c
View File

@ -387,6 +387,7 @@ aoeblk_gdalloc(void *vp)
set = &d->tag_set;
set->ops = &aoeblk_mq_ops;
set->cmd_size = sizeof(struct aoe_req);
set->nr_hw_queues = 1;
set->queue_depth = 128;
set->numa_node = NUMA_NO_NODE;

27
drivers/block/aoe/aoecmd.c
View File

@ -822,17 +822,6 @@ rexmit_timer(struct timer_list *timer)
spin_unlock_irqrestore(&d->lock, flags);
}
static unsigned long
rqbiocnt(struct request *r)
{
struct bio *bio;
unsigned long n = 0;
__rq_for_each_bio(bio, r)
n++;
return n;
}
static void
bufinit(struct buf *buf, struct request *rq, struct bio *bio)
{
@ -847,6 +836,7 @@ nextbuf(struct aoedev *d)
{
struct request *rq;
struct request_queue *q;
struct aoe_req *req;
struct buf *buf;
struct bio *bio;
@ -865,7 +855,11 @@ nextbuf(struct aoedev *d)
blk_mq_start_request(rq);
d->ip.rq = rq;
d->ip.nxbio = rq->bio;
rq->special = (void *) rqbiocnt(rq);
req = blk_mq_rq_to_pdu(rq);
req->nr_bios = 0;
__rq_for_each_bio(bio, rq)
req->nr_bios++;
}
buf = mempool_alloc(d->bufpool, GFP_ATOMIC);
if (buf == NULL) {
@ -1069,16 +1063,13 @@ aoe_end_request(struct aoedev *d, struct request *rq, int fastfail)
static void
aoe_end_buf(struct aoedev *d, struct buf *buf)
{
struct request *rq;
unsigned long n;
struct request *rq = buf->rq;
struct aoe_req *req = blk_mq_rq_to_pdu(rq);
if (buf == d->ip.buf)
d->ip.buf = NULL;
rq = buf->rq;
mempool_free(buf, d->bufpool);
n = (unsigned long) rq->special;
rq->special = (void *) --n;
if (n == 0)
if (--req->nr_bios == 0)
aoe_end_request(d, rq, 0);
}

11
drivers/block/aoe/aoedev.c
View File

@ -160,21 +160,22 @@ static void
aoe_failip(struct aoedev *d)
{
struct request *rq;
struct aoe_req *req;
struct bio *bio;
unsigned long n;
aoe_failbuf(d, d->ip.buf);
rq = d->ip.rq;
if (rq == NULL)
return;
req = blk_mq_rq_to_pdu(rq);
while ((bio = d->ip.nxbio)) {
bio->bi_status = BLK_STS_IOERR;
d->ip.nxbio = bio->bi_next;
n = (unsigned long) rq->special;
rq->special = (void *) --n;
req->nr_bios--;
}
if ((unsigned long) rq->special == 0)
if (!req->nr_bios)
aoe_end_request(d, rq, 0);
}