[PATCH v7 19/25] block/rnbd: server: private header with server structs and functions

Jack Wang
2020-01-16T12:59:47Z

From: Jack Wang <jinpu.wang@cloud.ionos.com>

This header describes main structs and functions used by rnbd-server
module, namely structs for managing sessions from different clients
and mapped (opened) devices.

Signed-off-by: Danil Kipnis <danil.kipnis@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
---
drivers/block/rnbd/rnbd-srv.h | 81 +++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
create mode 100644 drivers/block/rnbd/rnbd-srv.h

diff --git a/drivers/block/rnbd/rnbd-srv.h b/drivers/block/rnbd/rnbd-srv.h
new file mode 100644
index 000000000000..7567d84dca4e
--- /dev/null
+++ b/drivers/block/rnbd/rnbd-srv.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * RDMA Network Block Driver
+ *
+ * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
+ *
+ * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
+ *
+ * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
+ */
+#ifndef RNBD_SRV_H
+#define RNBD_SRV_H
+
+#include <linux/types.h>
+#include <linux/idr.h>
+#include <linux/kref.h>
+
+#include "rtrs.h"
+#include "rnbd-proto.h"
+#include "rnbd-log.h"
+
+struct rnbd_srv_session {
+ /* Entry inside global sess_list */
+ struct list_head list;
+ struct rtrs_srv *rtrs;
+ char sessname[NAME_MAX];
+ int queue_depth;
+ struct bio_set sess_bio_set;
+
+ rwlock_t index_lock ____cacheline_aligned;
+ struct idr index_idr;
+ /* List of struct rnbd_srv_sess_dev */
+ struct list_head sess_dev_list;
+ struct mutex lock;
+ u8 ver;
+};
+
+struct rnbd_srv_dev {
+ /* Entry inside global dev_list */
+ struct list_head list;
+ struct kobject dev_kobj;
+ struct kobject dev_sessions_kobj;
+ struct kref kref;
+ char id[NAME_MAX];
+ /* List of rnbd_srv_sess_dev structs */
+ struct list_head sess_dev_list;
+ struct mutex lock;
+ int open_write_cnt;
+};
+
+/* Structure which binds N devices and N sessions */
+struct rnbd_srv_sess_dev {
+ /* Entry inside rnbd_srv_dev struct */
+ struct list_head dev_list;
+ /* Entry inside rnbd_srv_session struct */
+ struct list_head sess_list;
+ struct rnbd_dev *rnbd_dev;
+ struct rnbd_srv_session *sess;
+ struct rnbd_srv_dev *dev;
+ struct kobject kobj;
+ struct completion *sysfs_release_compl;
+ u32 device_id;
+ fmode_t open_flags;
+ struct kref kref;
+ struct completion *destroy_comp;
+ char pathname[NAME_MAX];
+ enum rnbd_access_mode access_mode;
+};
+
+/* rnbd-srv-sysfs.c */
+
+int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
+ struct block_device *bdev,
+ const char *dir_name);
+void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
+int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
+void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
+int rnbd_srv_create_sysfs_files(void);
+void rnbd_srv_destroy_sysfs_files(void);
+
+#endif /* RNBD_SRV_H */
--
2.17.1