[Xen-devel] [PATCH v2 12/13] xen/pvcalls: implement frontend disconnect

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

Implement pvcalls frontend removal function. Go through the list of
active and passive sockets and free them all, one at a time.

Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
CC: boris.ostrovsky@xxxxxxxxxx
CC: jgross@xxxxxxxx
---
 drivers/xen/pvcalls-front.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 5a4040e..b3d4675 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -911,6 +911,34 @@ int pvcalls_front_release(struct socket *sock)
 
 static int pvcalls_front_remove(struct xenbus_device *dev)
 {
+       struct pvcalls_bedata *bedata;
+       struct sock_mapping *map = NULL, *n;
+
+       bedata = dev_get_drvdata(&pvcalls_front_dev->dev);
+
+       list_for_each_entry_safe(map, n, &bedata->socket_mappings, list) {
+               mutex_lock(&map->active.in_mutex);
+               mutex_lock(&map->active.out_mutex);
+               pvcalls_front_free_map(bedata, map);
+               mutex_unlock(&map->active.out_mutex);
+               mutex_unlock(&map->active.in_mutex);
+               kfree(map);
+       }
+       list_for_each_entry_safe(map, n, &bedata->socketpass_mappings, list) {
+               spin_lock(&bedata->pvcallss_lock);
+               list_del_init(&map->list);
+               spin_unlock(&bedata->pvcallss_lock);
+               kfree(map);
+       }
+       if (bedata->irq > 0)
+               unbind_from_irqhandler(bedata->irq, dev);
+       if (bedata->ref >= 0)
+               gnttab_end_foreign_access(bedata->ref, 0, 0);
+       kfree(bedata->ring.sring);
+       kfree(bedata);
+       dev_set_drvdata(&dev->dev, NULL);
+       xenbus_switch_state(dev, XenbusStateClosed);
+       pvcalls_front_dev = NULL;
        return 0;
 }
 
-- 
1.9.1


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