1 files changed, 68 insertions, 19 deletions

diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index a4d625aefeaa..e26f6f4a28a2 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -9,6 +9,10 @@
 #include <linux/netdevice.h>
 #include "aoe.h"
 
+static void dummy_timer(ulong);
+static void aoedev_freedev(struct aoedev *);
+static void freetgt(struct aoetgt *t);
+
 static struct aoedev *devlist;
 static spinlock_t devlist_lock;
 
@@ -108,6 +112,70 @@ aoedev_downdev(struct aoedev *d)
         d->flags &= ~DEVFL_UP;
 }
 
+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);
+        }
+        t = d->targets;
+        e = t + NTARGETS;
+        for (; t < e && *t; t++)
+                freetgt(*t);
+        if (d->bufpool)
+                mempool_destroy(d->bufpool);
+        kfree(d);
+}
+
+int
+aoedev_flush(const char __user *str, size_t cnt)
+{
+        ulong flags;
+        struct aoedev *d, **dd;
+        struct aoedev *rmd = NULL;
+        char buf[16];
+        int all = 0;
+
+        if (cnt >= 3) {
+                if (cnt > sizeof buf)
+                        cnt = sizeof buf;
+                if (copy_from_user(buf, str, cnt))
+                        return -EFAULT;
+                all = !strncmp(buf, "all", 3);
+        }
+
+        flush_scheduled_work();
+        spin_lock_irqsave(&devlist_lock, flags);
+        dd = &devlist;
+        while ((d = *dd)) {
+                spin_lock(&d->lock);
+                if ((!all && (d->flags & DEVFL_UP))
+                || (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE))
+                || d->nopen) {
+                        spin_unlock(&d->lock);
+                        dd = &d->next;
+                        continue;
+                }
+                *dd = d->next;
+                aoedev_downdev(d);
+                d->flags |= DEVFL_TKILL;
+                spin_unlock(&d->lock);
+                d->next = rmd;
+                rmd = d;
+        }
+        spin_unlock_irqrestore(&devlist_lock, flags);
+        while ((d = rmd)) {
+                rmd = d->next;
+                del_timer_sync(&d->timer);
+                aoedev_freedev(d);      /* must be able to sleep */
+        }
+        return 0;
+}
+
 /* find it or malloc it */
 struct aoedev *
 aoedev_by_sysminor_m(ulong sysminor)
@@ -161,25 +229,6 @@ freetgt(struct aoetgt *t)
         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);
-        }
-        t = d->targets;
-        e = t + NTARGETS;
-        for (; t < e && *t; t++)
-                freetgt(*t);
-        if (d->bufpool)
-                mempool_destroy(d->bufpool);
-        kfree(d);
-}
-
 void
 aoedev_exit(void)
 {