251 lines
6.5 KiB
C
251 lines
6.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* RDMA Transport Layer
|
|
*
|
|
* 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 RTRS_CLT_H
|
|
#define RTRS_CLT_H
|
|
|
|
#include <linux/device.h>
|
|
#include "rtrs-pri.h"
|
|
|
|
/**
|
|
* enum rtrs_clt_state - Client states.
|
|
*/
|
|
enum rtrs_clt_state {
|
|
RTRS_CLT_CONNECTING,
|
|
RTRS_CLT_CONNECTING_ERR,
|
|
RTRS_CLT_RECONNECTING,
|
|
RTRS_CLT_CONNECTED,
|
|
RTRS_CLT_CLOSING,
|
|
RTRS_CLT_CLOSED,
|
|
RTRS_CLT_DEAD,
|
|
};
|
|
|
|
enum rtrs_mp_policy {
|
|
MP_POLICY_RR,
|
|
MP_POLICY_MIN_INFLIGHT,
|
|
MP_POLICY_MIN_LATENCY,
|
|
};
|
|
|
|
/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */
|
|
struct rtrs_clt_stats_reconnects {
|
|
int successful_cnt;
|
|
int fail_cnt;
|
|
};
|
|
|
|
/* see Documentation/ABI/testing/sysfs-class-rtrs-client for details */
|
|
struct rtrs_clt_stats_cpu_migr {
|
|
atomic_t from;
|
|
int to;
|
|
};
|
|
|
|
/* stats for Read and write operation.
|
|
* see Documentation/ABI/testing/sysfs-class-rtrs-client for details
|
|
*/
|
|
struct rtrs_clt_stats_rdma {
|
|
struct {
|
|
u64 cnt;
|
|
u64 size_total;
|
|
} dir[2];
|
|
|
|
u64 failover_cnt;
|
|
};
|
|
|
|
struct rtrs_clt_stats_pcpu {
|
|
struct rtrs_clt_stats_cpu_migr cpu_migr;
|
|
struct rtrs_clt_stats_rdma rdma;
|
|
};
|
|
|
|
struct rtrs_clt_stats {
|
|
struct kobject kobj_stats;
|
|
struct rtrs_clt_stats_pcpu __percpu *pcpu_stats;
|
|
struct rtrs_clt_stats_reconnects reconnects;
|
|
atomic_t inflight;
|
|
};
|
|
|
|
struct rtrs_clt_con {
|
|
struct rtrs_con c;
|
|
struct rtrs_iu *rsp_ius;
|
|
u32 queue_num;
|
|
unsigned int cpu;
|
|
struct mutex con_mutex;
|
|
int cm_err;
|
|
};
|
|
|
|
/**
|
|
* rtrs_permit - permits the memory allocation for future RDMA operation.
|
|
* Combine with irq pinning to keep IO on same CPU.
|
|
*/
|
|
struct rtrs_permit {
|
|
enum rtrs_clt_con_type con_type;
|
|
unsigned int cpu_id;
|
|
unsigned int mem_id;
|
|
unsigned int mem_off;
|
|
};
|
|
|
|
/**
|
|
* rtrs_clt_io_req - describes one inflight IO request
|
|
*/
|
|
struct rtrs_clt_io_req {
|
|
struct list_head list;
|
|
struct rtrs_iu *iu;
|
|
struct scatterlist *sglist; /* list holding user data */
|
|
unsigned int sg_cnt;
|
|
unsigned int sg_size;
|
|
unsigned int data_len;
|
|
unsigned int usr_len;
|
|
void *priv;
|
|
bool in_use;
|
|
enum rtrs_mp_policy mp_policy;
|
|
struct rtrs_clt_con *con;
|
|
struct rtrs_sg_desc *desc;
|
|
struct ib_sge *sge;
|
|
struct rtrs_permit *permit;
|
|
enum dma_data_direction dir;
|
|
void (*conf)(void *priv, int errno);
|
|
unsigned long start_jiffies;
|
|
|
|
struct ib_mr *mr;
|
|
struct ib_cqe inv_cqe;
|
|
struct completion inv_comp;
|
|
int inv_errno;
|
|
bool need_inv_comp;
|
|
bool need_inv;
|
|
refcount_t ref;
|
|
};
|
|
|
|
struct rtrs_rbuf {
|
|
u64 addr;
|
|
u32 rkey;
|
|
};
|
|
|
|
struct rtrs_clt_path {
|
|
struct rtrs_path s;
|
|
struct rtrs_clt *clt;
|
|
wait_queue_head_t state_wq;
|
|
enum rtrs_clt_state state;
|
|
atomic_t connected_cnt;
|
|
struct mutex init_mutex;
|
|
struct rtrs_clt_io_req *reqs;
|
|
struct delayed_work reconnect_dwork;
|
|
struct work_struct close_work;
|
|
unsigned int reconnect_attempts;
|
|
bool established;
|
|
struct rtrs_rbuf *rbufs;
|
|
size_t max_io_size;
|
|
u32 max_hdr_size;
|
|
u32 chunk_size;
|
|
size_t queue_depth;
|
|
u32 max_pages_per_mr;
|
|
u32 flags;
|
|
struct kobject kobj;
|
|
u8 for_new_clt;
|
|
struct rtrs_clt_stats *stats;
|
|
/* cache hca_port and hca_name to display in sysfs */
|
|
u8 hca_port;
|
|
char hca_name[IB_DEVICE_NAME_MAX];
|
|
struct list_head __percpu
|
|
*mp_skip_entry;
|
|
};
|
|
|
|
struct rtrs_clt {
|
|
struct list_head paths_list; /* rcu protected list */
|
|
size_t paths_num;
|
|
struct rtrs_clt_path
|
|
__rcu * __percpu *pcpu_path;
|
|
uuid_t paths_uuid;
|
|
int paths_up;
|
|
struct mutex paths_mutex;
|
|
struct mutex paths_ev_mutex;
|
|
char sessname[NAME_MAX];
|
|
u16 port;
|
|
unsigned int max_reconnect_attempts;
|
|
unsigned int reconnect_delay_sec;
|
|
unsigned int max_segments;
|
|
void *permits;
|
|
unsigned long *permits_map;
|
|
size_t queue_depth;
|
|
size_t max_io_size;
|
|
wait_queue_head_t permits_wait;
|
|
size_t pdu_sz;
|
|
void *priv;
|
|
void (*link_ev)(void *priv,
|
|
enum rtrs_clt_link_ev ev);
|
|
struct device dev;
|
|
struct kobject *kobj_paths;
|
|
enum rtrs_mp_policy mp_policy;
|
|
};
|
|
|
|
static inline struct rtrs_clt_con *to_clt_con(struct rtrs_con *c)
|
|
{
|
|
return container_of(c, struct rtrs_clt_con, c);
|
|
}
|
|
|
|
static inline struct rtrs_clt_path *to_clt_path(struct rtrs_path *s)
|
|
{
|
|
return container_of(s, struct rtrs_clt_path, s);
|
|
}
|
|
|
|
static inline int permit_size(struct rtrs_clt *clt)
|
|
{
|
|
return sizeof(struct rtrs_permit) + clt->pdu_sz;
|
|
}
|
|
|
|
static inline struct rtrs_permit *get_permit(struct rtrs_clt *clt, int idx)
|
|
{
|
|
return (struct rtrs_permit *)(clt->permits + permit_size(clt) * idx);
|
|
}
|
|
|
|
int rtrs_clt_reconnect_from_sysfs(struct rtrs_clt_path *path);
|
|
void rtrs_clt_close_conns(struct rtrs_clt_path *clt_path, bool wait);
|
|
int rtrs_clt_create_path_from_sysfs(struct rtrs_clt *clt,
|
|
struct rtrs_addr *addr);
|
|
int rtrs_clt_remove_path_from_sysfs(struct rtrs_clt_path *path,
|
|
const struct attribute *sysfs_self);
|
|
|
|
void rtrs_clt_set_max_reconnect_attempts(struct rtrs_clt *clt, int value);
|
|
int rtrs_clt_get_max_reconnect_attempts(const struct rtrs_clt *clt);
|
|
void free_path(struct rtrs_clt_path *clt_path);
|
|
|
|
/* rtrs-clt-stats.c */
|
|
|
|
int rtrs_clt_init_stats(struct rtrs_clt_stats *stats);
|
|
|
|
void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *s);
|
|
|
|
void rtrs_clt_update_wc_stats(struct rtrs_clt_con *con);
|
|
void rtrs_clt_update_all_stats(struct rtrs_clt_io_req *req, int dir);
|
|
|
|
int rtrs_clt_reset_rdma_lat_distr_stats(struct rtrs_clt_stats *stats,
|
|
bool enable);
|
|
ssize_t rtrs_clt_stats_rdma_lat_distr_to_str(struct rtrs_clt_stats *stats,
|
|
char *page, size_t len);
|
|
int rtrs_clt_reset_cpu_migr_stats(struct rtrs_clt_stats *stats, bool enable);
|
|
int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats, char *buf,
|
|
size_t len);
|
|
int rtrs_clt_reset_reconnects_stat(struct rtrs_clt_stats *stats, bool enable);
|
|
int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf,
|
|
size_t len);
|
|
int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable);
|
|
ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats,
|
|
char *page, size_t len);
|
|
int rtrs_clt_reset_all_stats(struct rtrs_clt_stats *stats, bool enable);
|
|
ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *stats,
|
|
char *page, size_t len);
|
|
|
|
/* rtrs-clt-sysfs.c */
|
|
|
|
int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt);
|
|
void rtrs_clt_destroy_sysfs_root(struct rtrs_clt *clt);
|
|
|
|
int rtrs_clt_create_path_files(struct rtrs_clt_path *clt_path);
|
|
void rtrs_clt_destroy_path_files(struct rtrs_clt_path *clt_path,
|
|
const struct attribute *sysfs_self);
|
|
|
|
#endif /* RTRS_CLT_H */
|