mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 02:50:43 +00:00
c77bfa8f5d
We changed the rnbd_srv_sess_dev_force_close to use try-lock because rnbd_srv_sess_dev_force_close and process_msg_close can generate a deadlock. Now rnbd_srv_sess_dev_force_close would do nothing if it fails to get the lock. So removing the force_close file should be moved to after the lock. Or the force_close file is removed but the others are not removed. Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com> Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com> Signed-off-by: Jack Wang <jinpu.wang@ionos.com> Link: https://lore.kernel.org/r/20210419073722.15351-11-gi-oh.kim@ionos.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* 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;
|
|
|
|
struct xarray 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;
|
|
u32 device_id;
|
|
bool keep_id;
|
|
fmode_t open_flags;
|
|
struct kref kref;
|
|
struct completion *destroy_comp;
|
|
char pathname[NAME_MAX];
|
|
enum rnbd_access_mode access_mode;
|
|
};
|
|
|
|
void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
|
|
struct kobj_attribute *attr);
|
|
/* 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);
|
|
void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);
|
|
|
|
#endif /* RNBD_SRV_H */
|