INIT_LIST_HEAD(&cache->volumes);
INIT_LIST_HEAD(&cache->object_list);
spin_lock_init(&cache->object_list_lock);
+ refcount_set(&cache->unbind_pincount, 1);
xa_init_flags(&cache->reqs, XA_FLAGS_ALLOC);
xa_init_flags(&cache->ondemand_ids, XA_FLAGS_ALLOC1);
xa_destroy(&cache->ondemand_ids);
}
+void cachefiles_put_unbind_pincount(struct cachefiles_cache *cache)
+{
+ if (refcount_dec_and_test(&cache->unbind_pincount)) {
+ cachefiles_daemon_unbind(cache);
+ cachefiles_open = 0;
+ kfree(cache);
+ }
+}
+
+void cachefiles_get_unbind_pincount(struct cachefiles_cache *cache)
+{
+ refcount_inc(&cache->unbind_pincount);
+}
+
/*
* Release a cache.
*/
if (cachefiles_in_ondemand_mode(cache))
cachefiles_flush_reqs(cache);
- cachefiles_daemon_unbind(cache);
/* clean up the control file interface */
cache->cachefilesd = NULL;
file->private_data = NULL;
- cachefiles_open = 0;
- kfree(cache);
+ cachefiles_put_unbind_pincount(cache);
_leave("");
return 0;
char *rootdirname; /* name of cache root directory */
char *secctx; /* LSM security context */
char *tag; /* cache binding tag */
+ refcount_t unbind_pincount;/* refcount to do daemon unbind */
struct xarray reqs; /* xarray of pending on-demand requests */
struct xarray ondemand_ids; /* xarray for ondemand_id allocation */
u32 ondemand_id_next;
* daemon.c
*/
extern const struct file_operations cachefiles_daemon_fops;
+extern void cachefiles_get_unbind_pincount(struct cachefiles_cache *cache);
+extern void cachefiles_put_unbind_pincount(struct cachefiles_cache *cache);
/*
* error_inject.c
object->ondemand_id = CACHEFILES_ONDEMAND_ID_CLOSED;
xa_erase(&cache->ondemand_ids, object_id);
cachefiles_put_object(object, cachefiles_obj_put_ondemand_fd);
+ cachefiles_put_unbind_pincount(cache);
return 0;
}
load->fd = fd;
req->msg.object_id = object_id;
object->ondemand_id = object_id;
+
+ cachefiles_get_unbind_pincount(cache);
return 0;
err_put_fd: