mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-29 17:25:38 +00:00
ae2dfd1d8d
Let's change the parameter type to 'sector_t' then we don't need to cast it from rnbd_clt_resize_dev_store, and update rnbd_clt_resize_disk too. Acked-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev> Link: https://lore.kernel.org/r/20220706133152.12058-8-guoqing.jiang@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk>
152 lines
3.7 KiB
C
152 lines
3.7 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_CLT_H
|
|
#define RNBD_CLT_H
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/in.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/blk-mq.h>
|
|
#include <linux/refcount.h>
|
|
|
|
#include <rtrs.h>
|
|
#include "rnbd-proto.h"
|
|
#include "rnbd-log.h"
|
|
|
|
/* time in seconds between reconnect tries, default to 30 s */
|
|
#define RECONNECT_DELAY 30
|
|
/*
|
|
* Number of times to reconnect on error before giving up, 0 for * disabled,
|
|
* -1 for forever
|
|
*/
|
|
#define MAX_RECONNECTS -1
|
|
|
|
enum rnbd_clt_dev_state {
|
|
DEV_STATE_INIT,
|
|
DEV_STATE_MAPPED,
|
|
DEV_STATE_MAPPED_DISCONNECTED,
|
|
DEV_STATE_UNMAPPED,
|
|
};
|
|
|
|
struct rnbd_iu_comp {
|
|
wait_queue_head_t wait;
|
|
int errno;
|
|
};
|
|
|
|
#ifdef CONFIG_ARCH_NO_SG_CHAIN
|
|
#define RNBD_INLINE_SG_CNT 0
|
|
#else
|
|
#define RNBD_INLINE_SG_CNT 2
|
|
#endif
|
|
#define RNBD_RDMA_SGL_SIZE (sizeof(struct scatterlist) * RNBD_INLINE_SG_CNT)
|
|
|
|
struct rnbd_iu {
|
|
union {
|
|
struct request *rq; /* for block io */
|
|
void *buf; /* for user messages */
|
|
};
|
|
struct rtrs_permit *permit;
|
|
union {
|
|
/* use to send msg associated with a dev */
|
|
struct rnbd_clt_dev *dev;
|
|
/* use to send msg associated with a sess */
|
|
struct rnbd_clt_session *sess;
|
|
};
|
|
struct sg_table sgt;
|
|
struct work_struct work;
|
|
int errno;
|
|
struct rnbd_iu_comp comp;
|
|
atomic_t refcount;
|
|
struct scatterlist first_sgl[]; /* must be the last one */
|
|
};
|
|
|
|
struct rnbd_cpu_qlist {
|
|
struct list_head requeue_list;
|
|
spinlock_t requeue_lock;
|
|
unsigned int cpu;
|
|
};
|
|
|
|
struct rnbd_clt_session {
|
|
struct list_head list;
|
|
struct rtrs_clt_sess *rtrs;
|
|
wait_queue_head_t rtrs_waitq;
|
|
bool rtrs_ready;
|
|
struct rnbd_cpu_qlist __percpu
|
|
*cpu_queues;
|
|
DECLARE_BITMAP(cpu_queues_bm, NR_CPUS);
|
|
int __percpu *cpu_rr; /* per-cpu var for CPU round-robin */
|
|
atomic_t busy;
|
|
size_t queue_depth;
|
|
u32 max_io_size;
|
|
u32 max_segments;
|
|
struct blk_mq_tag_set tag_set;
|
|
u32 nr_poll_queues;
|
|
struct mutex lock; /* protects state and devs_list */
|
|
struct list_head devs_list; /* list of struct rnbd_clt_dev */
|
|
refcount_t refcount;
|
|
char sessname[NAME_MAX];
|
|
u8 ver; /* protocol version */
|
|
};
|
|
|
|
/**
|
|
* Submission queues.
|
|
*/
|
|
struct rnbd_queue {
|
|
struct list_head requeue_list;
|
|
unsigned long in_list;
|
|
struct rnbd_clt_dev *dev;
|
|
struct blk_mq_hw_ctx *hctx;
|
|
};
|
|
|
|
struct rnbd_clt_dev {
|
|
struct kobject kobj;
|
|
struct rnbd_clt_session *sess;
|
|
struct request_queue *queue;
|
|
struct rnbd_queue *hw_queues;
|
|
u32 device_id;
|
|
/* local Idr index - used to track minor number allocations. */
|
|
u32 clt_device_id;
|
|
struct mutex lock;
|
|
enum rnbd_clt_dev_state dev_state;
|
|
refcount_t refcount;
|
|
char *pathname;
|
|
enum rnbd_access_mode access_mode;
|
|
u32 nr_poll_queues;
|
|
u64 size; /* device size in bytes */
|
|
struct list_head list;
|
|
struct gendisk *gd;
|
|
char *blk_symlink_name;
|
|
struct work_struct unmap_on_rmmod_work;
|
|
};
|
|
|
|
/* rnbd-clt.c */
|
|
|
|
struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname,
|
|
struct rtrs_addr *paths,
|
|
size_t path_cnt, u16 port_nr,
|
|
const char *pathname,
|
|
enum rnbd_access_mode access_mode,
|
|
u32 nr_poll_queues);
|
|
int rnbd_clt_unmap_device(struct rnbd_clt_dev *dev, bool force,
|
|
const struct attribute *sysfs_self);
|
|
|
|
int rnbd_clt_remap_device(struct rnbd_clt_dev *dev);
|
|
int rnbd_clt_resize_disk(struct rnbd_clt_dev *dev, sector_t newsize);
|
|
|
|
/* rnbd-clt-sysfs.c */
|
|
|
|
int rnbd_clt_create_sysfs_files(void);
|
|
|
|
void rnbd_clt_destroy_sysfs_files(void);
|
|
|
|
void rnbd_clt_remove_dev_symlink(struct rnbd_clt_dev *dev);
|
|
|
|
#endif /* RNBD_CLT_H */
|