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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.c69
1 files changed, 48 insertions, 21 deletions
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index ded33ba31acc..ed4258a62df5 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -12,6 +12,24 @@
static struct aoedev *devlist;
static spinlock_t devlist_lock;
+int
+aoedev_isbusy(struct aoedev *d)
+{
+ struct frame *f, *e;
+
+ f = d->frames;
+ e = f + d->nframes;
+ do {
+ if (f->tag != FREETAG) {
+ printk(KERN_DEBUG "aoe: %ld.%ld isbusy\n",
+ d->aoemajor, d->aoeminor);
+ return 1;
+ }
+ } while (++f < e);
+
+ return 0;
+}
+
struct aoedev *
aoedev_by_aoeaddr(int maj, int min)
{
@@ -28,6 +46,18 @@ aoedev_by_aoeaddr(int maj, int min)
return d;
}
+static void
+dummy_timer(ulong vp)
+{
+ struct aoedev *d;
+
+ d = (struct aoedev *)vp;
+ if (d->flags & DEVFL_TKILL)
+ return;
+ d->timer.expires = jiffies + HZ;
+ add_timer(&d->timer);
+}
+
/* called with devlist lock held */
static struct aoedev *
aoedev_newdev(ulong nframes)
@@ -44,6 +74,8 @@ aoedev_newdev(ulong nframes)
return NULL;
}
+ INIT_WORK(&d->work, aoecmd_sleepwork, d);
+
d->nframes = nframes;
d->frames = f;
e = f + nframes;
@@ -52,6 +84,10 @@ aoedev_newdev(ulong nframes)
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;
@@ -67,9 +103,6 @@ aoedev_downdev(struct aoedev *d)
struct buf *buf;
struct bio *bio;
- d->flags |= DEVFL_TKILL;
- del_timer(&d->timer);
-
f = d->frames;
e = f + d->nframes;
for (; f<e; f->tag = FREETAG, f->buf = NULL, f++) {
@@ -92,16 +125,15 @@ aoedev_downdev(struct aoedev *d)
bio_endio(bio, bio->bi_size, -EIO);
}
- if (d->nopen)
- d->flags |= DEVFL_CLOSEWAIT;
if (d->gd)
d->gd->capacity = 0;
- d->flags &= ~DEVFL_UP;
+ d->flags &= ~(DEVFL_UP | DEVFL_PAUSE);
}
+/* find it or malloc it */
struct aoedev *
-aoedev_set(ulong sysminor, unsigned char *addr, struct net_device *ifp, ulong bufcnt)
+aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt)
{
struct aoedev *d;
ulong flags;
@@ -112,25 +144,19 @@ aoedev_set(ulong sysminor, unsigned char *addr, struct net_device *ifp, ulong bu
if (d->sysminor == sysminor)
break;
- if (d == NULL && (d = aoedev_newdev(bufcnt)) == NULL) {
- spin_unlock_irqrestore(&devlist_lock, flags);
- printk(KERN_INFO "aoe: aoedev_set: aoedev_newdev failure.\n");
- return NULL;
- } /* if newdev, (d->flags & DEVFL_UP) == 0 for below */
-
- spin_unlock_irqrestore(&devlist_lock, flags);
- spin_lock_irqsave(&d->lock, flags);
-
- d->ifp = ifp;
- memcpy(d->addr, addr, sizeof d->addr);
- if ((d->flags & DEVFL_UP) == 0) {
- aoedev_downdev(d); /* flushes outstanding frames */
+ if (d == NULL) {
+ d = aoedev_newdev(bufcnt);
+ if (d == NULL) {
+ spin_unlock_irqrestore(&devlist_lock, flags);
+ printk(KERN_INFO "aoe: aoedev_set: aoedev_newdev failure.\n");
+ return NULL;
+ }
d->sysminor = sysminor;
d->aoemajor = AOEMAJOR(sysminor);
d->aoeminor = AOEMINOR(sysminor);
}
- spin_unlock_irqrestore(&d->lock, flags);
+ spin_unlock_irqrestore(&devlist_lock, flags);
return d;
}
@@ -161,6 +187,7 @@ aoedev_exit(void)
spin_lock_irqsave(&d->lock, flags);
aoedev_downdev(d);
+ d->flags |= DEVFL_TKILL;
spin_unlock_irqrestore(&d->lock, flags);
del_timer_sync(&d->timer);