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path: root/drivers/block/aoe/aoedev.c
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Diffstat (limited to 'drivers/block/aoe/aoedev.c')
-rw-r--r--drivers/block/aoe/aoedev.c168
1 files changed, 79 insertions, 89 deletions
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index 51f50710e5fc..a4d625aefeaa 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -15,15 +15,18 @@ static spinlock_t devlist_lock;
int
aoedev_isbusy(struct aoedev *d)
{
+ struct aoetgt **t, **te;
struct frame *f, *e;
- f = d->frames;
- e = f + d->nframes;
- do {
- if (f->tag != FREETAG)
- return 1;
- } while (++f < e);
-
+ t = d->targets;
+ te = t + NTARGETS;
+ for (; t < te && *t; t++) {
+ f = (*t)->frames;
+ e = f + (*t)->nframes;
+ for (; f < e; f++)
+ if (f->tag != FREETAG)
+ return 1;
+ }
return 0;
}
@@ -55,75 +58,41 @@ dummy_timer(ulong vp)
add_timer(&d->timer);
}
-/* called with devlist lock held */
-static struct aoedev *
-aoedev_newdev(ulong nframes)
-{
- struct aoedev *d;
- struct frame *f, *e;
-
- d = kzalloc(sizeof *d, GFP_ATOMIC);
- f = kcalloc(nframes, sizeof *f, GFP_ATOMIC);
- switch (!d || !f) {
- case 0:
- d->nframes = nframes;
- d->frames = f;
- e = f + nframes;
- for (; f<e; f++) {
- f->tag = FREETAG;
- f->skb = new_skb(ETH_ZLEN);
- if (!f->skb)
- break;
- }
- if (f == e)
- break;
- while (f > d->frames) {
- f--;
- dev_kfree_skb(f->skb);
- }
- default:
- if (f)
- kfree(f);
- if (d)
- kfree(d);
- return NULL;
- }
- INIT_WORK(&d->work, aoecmd_sleepwork);
- spin_lock_init(&d->lock);
- init_timer(&d->timer);
- d->timer.data = (ulong) d;
- d->timer.function = dummy_timer;
- d->timer.expires = jiffies + HZ;
- add_timer(&d->timer);
- d->bufpool = NULL; /* defer to aoeblk_gdalloc */
- INIT_LIST_HEAD(&d->bufq);
- d->next = devlist;
- devlist = d;
-
- return d;
-}
-
void
aoedev_downdev(struct aoedev *d)
{
+ struct aoetgt **t, **te;
struct frame *f, *e;
struct buf *buf;
struct bio *bio;
- f = d->frames;
- e = f + d->nframes;
- for (; f<e; f->tag = FREETAG, f->buf = NULL, f++) {
- if (f->tag == FREETAG || f->buf == NULL)
- continue;
- buf = f->buf;
- bio = buf->bio;
- if (--buf->nframesout == 0) {
- mempool_free(buf, d->bufpool);
- bio_endio(bio, -EIO);
+ t = d->targets;
+ te = t + NTARGETS;
+ for (; t < te && *t; t++) {
+ f = (*t)->frames;
+ e = f + (*t)->nframes;
+ for (; f < e; f->tag = FREETAG, f->buf = NULL, f++) {
+ if (f->tag == FREETAG || f->buf == NULL)
+ continue;
+ buf = f->buf;
+ bio = buf->bio;
+ if (--buf->nframesout == 0
+ && buf != d->inprocess) {
+ mempool_free(buf, d->bufpool);
+ bio_endio(bio, -EIO);
+ }
}
- skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0;
+ (*t)->maxout = (*t)->nframes;
+ (*t)->nout = 0;
+ }
+ buf = d->inprocess;
+ if (buf) {
+ bio = buf->bio;
+ mempool_free(buf, d->bufpool);
+ bio_endio(bio, -EIO);
}
d->inprocess = NULL;
+ d->htgt = NULL;
while (!list_empty(&d->bufq)) {
buf = container_of(d->bufq.next, struct buf, bufs);
@@ -136,12 +105,12 @@ aoedev_downdev(struct aoedev *d)
if (d->gd)
d->gd->capacity = 0;
- d->flags &= ~(DEVFL_UP | DEVFL_PAUSE);
+ d->flags &= ~DEVFL_UP;
}
/* find it or malloc it */
struct aoedev *
-aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt)
+aoedev_by_sysminor_m(ulong sysminor)
{
struct aoedev *d;
ulong flags;
@@ -151,40 +120,61 @@ aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt)
for (d=devlist; d; d=d->next)
if (d->sysminor == sysminor)
break;
-
- if (d == NULL) {
- d = aoedev_newdev(bufcnt);
- if (d == NULL) {
- spin_unlock_irqrestore(&devlist_lock, flags);
- printk(KERN_INFO "aoe: aoedev_newdev failure.\n");
- return NULL;
- }
- d->sysminor = sysminor;
- d->aoemajor = AOEMAJOR(sysminor);
- d->aoeminor = AOEMINOR(sysminor);
- }
-
+ if (d)
+ goto out;
+ d = kcalloc(1, sizeof *d, GFP_ATOMIC);
+ if (!d)
+ goto out;
+ INIT_WORK(&d->work, aoecmd_sleepwork);
+ spin_lock_init(&d->lock);
+ init_timer(&d->timer);
+ d->timer.data = (ulong) d;
+ d->timer.function = dummy_timer;
+ d->timer.expires = jiffies + HZ;
+ add_timer(&d->timer);
+ d->bufpool = NULL; /* defer to aoeblk_gdalloc */
+ d->tgt = d->targets;
+ INIT_LIST_HEAD(&d->bufq);
+ d->sysminor = sysminor;
+ d->aoemajor = AOEMAJOR(sysminor);
+ d->aoeminor = AOEMINOR(sysminor);
+ d->mintimer = MINTIMER;
+ d->next = devlist;
+ devlist = d;
+ out:
spin_unlock_irqrestore(&devlist_lock, flags);
return d;
}
static void
-aoedev_freedev(struct aoedev *d)
+freetgt(struct aoetgt *t)
{
struct frame *f, *e;
+ f = t->frames;
+ e = f + t->nframes;
+ for (; f < e; f++) {
+ skb_shinfo(f->skb)->nr_frags = 0;
+ dev_kfree_skb(f->skb);
+ }
+ kfree(t->frames);
+ kfree(t);
+}
+
+static void
+aoedev_freedev(struct aoedev *d)
+{
+ struct aoetgt **t, **e;
+
if (d->gd) {
aoedisk_rm_sysfs(d);
del_gendisk(d->gd);
put_disk(d->gd);
}
- f = d->frames;
- e = f + d->nframes;
- for (; f<e; f++) {
- skb_shinfo(f->skb)->nr_frags = 0;
- dev_kfree_skb(f->skb);
- }
- kfree(d->frames);
+ t = d->targets;
+ e = t + NTARGETS;
+ for (; t < e && *t; t++)
+ freetgt(*t);
if (d->bufpool)
mempool_destroy(d->bufpool);
kfree(d);