@@ -35,6 +35,7 @@
#include <rdma/ib_verbs.h>
#include <rdma/uverbs_types.h>
#include <linux/rcupdate.h>
+#include <rdma/uverbs_ioctl.h>
#include "uverbs.h"
#include "core_priv.h"
#include "rdma_core.h"
@@ -625,3 +626,60 @@ void uverbs_initialize_ucontext(struct ib_ucontext *ucontext)
.needs_kfree_rcu = false,
};
+struct ib_uobject *uverbs_get_uobject_from_context(const struct uverbs_obj_type *type_attrs,
+ struct ib_ucontext *ucontext,
+ enum uverbs_obj_access access,
+ int id)
+{
+ switch (access) {
+ case UVERBS_ACCESS_READ:
+ return rdma_lookup_get_uobject(type_attrs, ucontext, id, false);
+ case UVERBS_ACCESS_DESTROY:
+ case UVERBS_ACCESS_WRITE:
+ return rdma_lookup_get_uobject(type_attrs, ucontext, id, true);
+ case UVERBS_ACCESS_NEW:
+ return rdma_alloc_begin_uobject(type_attrs, ucontext);
+ default:
+ WARN_ON(true);
+ return ERR_PTR(-EOPNOTSUPP);
+ }
+}
+
+int uverbs_finalize_object(struct ib_uobject *uobj,
+ enum uverbs_obj_access access,
+ bool commit)
+{
+ int ret = 0;
+
+ /*
+ * refcounts should be handled at the object level and not at the
+ * uobject level. Refcounts of the objects themselves are done in
+ * handlers.
+ */
+
+ switch (access) {
+ case UVERBS_ACCESS_READ:
+ rdma_lookup_put_uobject(uobj, false);
+ break;
+ case UVERBS_ACCESS_WRITE:
+ rdma_lookup_put_uobject(uobj, true);
+ break;
+ case UVERBS_ACCESS_DESTROY:
+ if (commit)
+ ret = rdma_remove_commit_uobject(uobj);
+ else
+ rdma_lookup_put_uobject(uobj, true);
+ break;
+ case UVERBS_ACCESS_NEW:
+ if (commit)
+ ret = rdma_alloc_commit_uobject(uobj);
+ else
+ rdma_alloc_abort_uobject(uobj);
+ break;
+ default:
+ WARN_ON(true);
+ ret = -EOPNOTSUPP;
+ }
+
+ return ret;
+}
@@ -39,6 +39,7 @@
#include <linux/idr.h>
#include <rdma/uverbs_types.h>
+#include <rdma/uverbs_ioctl.h>
#include <rdma/ib_verbs.h>
#include <linux/mutex.h>
@@ -75,4 +76,20 @@
*/
void uverbs_close_fd(struct file *f);
+/*
+ * Get an ib_uobject that corresponds to the given id from ucontext, assuming
+ * the object is from the given type. Lock it to the required access when
+ * applicable.
+ * This function could create (access == NEW), destroy (access == DESTROY)
+ * or unlock (access == READ || access == WRITE) objects if required.
+ * The action will be finalized only when uverbs_finalize_object is called.
+ */
+struct ib_uobject *uverbs_get_uobject_from_context(const struct uverbs_obj_type *type_attrs,
+ struct ib_ucontext *ucontext,
+ enum uverbs_obj_access access,
+ int id);
+int uverbs_finalize_object(struct ib_uobject *uobj,
+ enum uverbs_obj_access access,
+ bool commit);
+
#endif /* RDMA_CORE_H */
new file mode 100644
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016, Mellanox Technologies inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _UVERBS_IOCTL_
+#define _UVERBS_IOCTL_
+
+#include <rdma/uverbs_types.h>
+
+/*
+ * =======================================
+ * Verbs action specifications
+ * =======================================
+ */
+
+enum uverbs_obj_access {
+ UVERBS_ACCESS_READ,
+ UVERBS_ACCESS_WRITE,
+ UVERBS_ACCESS_NEW,
+ UVERBS_ACCESS_DESTROY
+};
+
+#endif
+