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786998050c
The forceful close of an exported device is required for the use case, when the client side hangs, is crashed, or is not accessible. There have been cases observed, where only some of the devices are to be cleaned up, but the session shall remain. When the device is to be exported to a different client host, server side cleanup is required. Signed-off-by: Lutz Pogrell <lutz.pogrell@cloud.ionos.com> Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com> Reviewed-by: Gioh Kim <gi-oh.kim@cloud.ionos.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* RDMA Network Block Driver
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*
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* Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
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* Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
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* Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
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*/
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#ifndef RNBD_SRV_H
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#define RNBD_SRV_H
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#include <linux/types.h>
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#include <linux/idr.h>
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#include <linux/kref.h>
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#include <rtrs.h>
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#include "rnbd-proto.h"
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#include "rnbd-log.h"
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struct rnbd_srv_session {
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/* Entry inside global sess_list */
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struct list_head list;
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struct rtrs_srv *rtrs;
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char sessname[NAME_MAX];
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int queue_depth;
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struct bio_set sess_bio_set;
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struct xarray index_idr;
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/* List of struct rnbd_srv_sess_dev */
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struct list_head sess_dev_list;
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struct mutex lock;
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u8 ver;
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};
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struct rnbd_srv_dev {
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/* Entry inside global dev_list */
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struct list_head list;
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struct kobject dev_kobj;
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struct kobject *dev_sessions_kobj;
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struct kref kref;
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char id[NAME_MAX];
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/* List of rnbd_srv_sess_dev structs */
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struct list_head sess_dev_list;
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struct mutex lock;
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int open_write_cnt;
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};
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/* Structure which binds N devices and N sessions */
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struct rnbd_srv_sess_dev {
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/* Entry inside rnbd_srv_dev struct */
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struct list_head dev_list;
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/* Entry inside rnbd_srv_session struct */
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struct list_head sess_list;
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struct rnbd_dev *rnbd_dev;
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struct rnbd_srv_session *sess;
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struct rnbd_srv_dev *dev;
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struct kobject kobj;
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u32 device_id;
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bool keep_id;
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fmode_t open_flags;
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struct kref kref;
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struct completion *destroy_comp;
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char pathname[NAME_MAX];
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enum rnbd_access_mode access_mode;
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};
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void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev);
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/* rnbd-srv-sysfs.c */
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int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
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struct block_device *bdev,
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const char *dir_name);
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void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
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int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
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void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
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int rnbd_srv_create_sysfs_files(void);
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void rnbd_srv_destroy_sysfs_files(void);
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void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);
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#endif /* RNBD_SRV_H */
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