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- // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
- /*
- * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
- */
- #include <rdma/uverbs_std_types.h>
- #include <rdma/uverbs_ioctl.h>
- #include "rdma_core.h"
- #include "uverbs.h"
- static int UVERBS_HANDLER(UVERBS_METHOD_ASYNC_EVENT_ALLOC)(
- struct uverbs_attr_bundle *attrs)
- {
- struct ib_uobject *uobj =
- uverbs_attr_get_uobject(attrs, UVERBS_METHOD_ASYNC_EVENT_ALLOC);
- ib_uverbs_init_async_event_file(
- container_of(uobj, struct ib_uverbs_async_event_file, uobj));
- return 0;
- }
- static int uverbs_async_event_destroy_uobj(struct ib_uobject *uobj,
- enum rdma_remove_reason why)
- {
- struct ib_uverbs_async_event_file *event_file =
- container_of(uobj, struct ib_uverbs_async_event_file, uobj);
- ib_unregister_event_handler(&event_file->event_handler);
- if (why == RDMA_REMOVE_DRIVER_REMOVE)
- ib_uverbs_async_handler(event_file, 0, IB_EVENT_DEVICE_FATAL,
- NULL, NULL);
- return 0;
- }
- int uverbs_async_event_release(struct inode *inode, struct file *filp)
- {
- struct ib_uverbs_async_event_file *event_file;
- struct ib_uobject *uobj = filp->private_data;
- int ret;
- if (!uobj)
- return uverbs_uobject_fd_release(inode, filp);
- event_file =
- container_of(uobj, struct ib_uverbs_async_event_file, uobj);
- /*
- * The async event FD has to deliver IB_EVENT_DEVICE_FATAL even after
- * disassociation, so cleaning the event list must only happen after
- * release. The user knows it has reached the end of the event stream
- * when it sees IB_EVENT_DEVICE_FATAL.
- */
- uverbs_uobject_get(uobj);
- ret = uverbs_uobject_fd_release(inode, filp);
- ib_uverbs_free_event_queue(&event_file->ev_queue);
- uverbs_uobject_put(uobj);
- return ret;
- }
- DECLARE_UVERBS_NAMED_METHOD(
- UVERBS_METHOD_ASYNC_EVENT_ALLOC,
- UVERBS_ATTR_FD(UVERBS_ATTR_ASYNC_EVENT_ALLOC_FD_HANDLE,
- UVERBS_OBJECT_ASYNC_EVENT,
- UVERBS_ACCESS_NEW,
- UA_MANDATORY));
- DECLARE_UVERBS_NAMED_OBJECT(
- UVERBS_OBJECT_ASYNC_EVENT,
- UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_async_event_file),
- uverbs_async_event_destroy_uobj,
- &uverbs_async_event_fops,
- "[infinibandevent]",
- O_RDONLY),
- &UVERBS_METHOD(UVERBS_METHOD_ASYNC_EVENT_ALLOC));
- const struct uapi_definition uverbs_def_obj_async_fd[] = {
- UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_ASYNC_EVENT),
- {}
- };
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