1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * RDMA Network Block Driver 4 * 5 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. 6 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. 7 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. 8 */ 9 #ifndef RNBD_SRV_H 10 #define RNBD_SRV_H 11 12 #include <linux/types.h> 13 #include <linux/idr.h> 14 #include <linux/kref.h> 15 16 #include <rtrs.h> 17 #include "rnbd-proto.h" 18 #include "rnbd-log.h" 19 20 struct rnbd_srv_session { 21 /* Entry inside global sess_list */ 22 struct list_head list; 23 struct rtrs_srv_sess *rtrs; 24 char sessname[NAME_MAX]; 25 int queue_depth; 26 27 struct xarray index_idr; 28 struct mutex lock; 29 u8 ver; 30 }; 31 32 struct rnbd_srv_dev { 33 /* Entry inside global dev_list */ 34 struct list_head list; 35 struct kobject dev_kobj; 36 struct kobject *dev_sessions_kobj; 37 struct kref kref; 38 char id[NAME_MAX]; 39 /* List of rnbd_srv_sess_dev structs */ 40 struct list_head sess_dev_list; 41 struct mutex lock; 42 int open_write_cnt; 43 }; 44 45 /* Structure which binds N devices and N sessions */ 46 struct rnbd_srv_sess_dev { 47 /* Entry inside rnbd_srv_dev struct */ 48 struct list_head dev_list; 49 struct block_device *bdev; 50 struct rnbd_srv_session *sess; 51 struct rnbd_srv_dev *dev; 52 struct kobject kobj; 53 u32 device_id; 54 bool keep_id; 55 fmode_t open_flags; 56 struct kref kref; 57 struct completion *destroy_comp; 58 char pathname[NAME_MAX]; 59 enum rnbd_access_mode access_mode; 60 }; 61 62 void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev, 63 struct kobj_attribute *attr); 64 /* rnbd-srv-sysfs.c */ 65 66 int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev, 67 struct block_device *bdev); 68 void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev); 69 int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev); 70 void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev); 71 int rnbd_srv_create_sysfs_files(void); 72 void rnbd_srv_destroy_sysfs_files(void); 73 void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id); 74 75 #endif /* RNBD_SRV_H */ 76