IB/core: Add support for fd objects

The completion channel we use in verbs infrastructure is FD based.
Previously, we had a separate way to manage this object. Since we
strive for a single way to manage any kind of object in this
infrastructure, we conceptually treat all objects as subclasses
of ib_uobject.

This commit adds the necessary mechanism to support FD based objects
like their IDR counterparts. FD objects release need to be synchronized
with context release. We use the cleanup_mutex on the uverbs_file for
that.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 2e8f661c900a..3a8e05894e9b 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1421,6 +1421,12 @@ struct ib_uobject {
 	const struct uverbs_obj_type *type;
 };
 
+struct ib_uobject_file {
+	struct ib_uobject	uobj;
+	/* ufile contains the lock between context release and file close */
+	struct ib_uverbs_file	*ufile;
+};
+
 struct ib_udata {
 	const void __user *inbuf;
 	void __user *outbuf;