Add v3_cons_sc sanity check for Terminal size

[palacios.git] / linux_module / vm.c

diff --git a/linux_module/vm.c b/linux_module/vm.c
index b14cff4..5584b38 100644 (file)
--- a/linux_module/vm.c
+++ b/linux_module/vm.c
@@ -93,6 +93,8 @@ int add_guest_ctrl(struct v3_guest * guest, unsigned int cmd,
 }
 
 
+
+
 static struct vm_ctrl * get_ctrl(struct v3_guest * guest, unsigned int cmd) {
     struct rb_node * n = guest->vm_ctrls.rb_node;
     struct vm_ctrl * ctrl = NULL;
@@ -112,6 +114,36 @@ static struct vm_ctrl * get_ctrl(struct v3_guest * guest, unsigned int cmd) {
     return NULL;
 }
 
+int remove_guest_ctrl(struct v3_guest * guest, unsigned int cmd) {
+    struct vm_ctrl * ctrl = get_ctrl(guest, cmd);
+
+    if (ctrl == NULL) {
+       INFO("Could not find control (%d) to remove\n", cmd);
+       return -1;
+    }
+
+    rb_erase(&(ctrl->tree_node), &(guest->vm_ctrls));
+
+    kfree(ctrl);
+
+    return 0;
+}
+
+static void free_guest_ctrls(struct v3_guest * guest) {
+    struct rb_node * node = rb_first(&(guest->vm_ctrls));
+    struct vm_ctrl * ctrl = NULL;
+    struct rb_node * tmp_node = NULL;
+
+    while (node) {
+       ctrl = rb_entry(node, struct vm_ctrl, tree_node);
+       tmp_node = node;
+       node = rb_next(node);
+       
+       WARNING("Cleaning up guest ctrl that was not removed explicitly (%d)\n", ctrl->cmd);
+
+       kfree(ctrl);
+    }
+}
 
 
 
@@ -402,12 +434,17 @@ out_err:
 
 int free_palacios_vm(struct v3_guest * guest) {
 
-    v3_free_vm(guest->v3_ctx);
+    if (v3_free_vm(guest->v3_ctx)<0) { 
+       return -1;
+    }
 
     device_destroy(v3_class, guest->vm_dev);
 
     cdev_del(&(guest->cdev));
 
+    free_guest_ctrls(guest);
+
+
     vfree(guest->img);
     palacios_free(guest);