1 /* SPDX-License-Identifier: GPL-2.0-or-later */
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.
13 #include <linux/device.h>
14 #include <linux/refcount.h>
15 #include <linux/percpu.h>
19 * enum rtrs_srv_state - Server states.
28 /* stats for Read and write operation.
29 * see Documentation/ABI/testing/sysfs-class-rtrs-server for details
31 struct rtrs_srv_stats_rdma_stats {
38 struct rtrs_srv_stats {
39 struct kobject kobj_stats;
40 struct rtrs_srv_stats_rdma_stats __percpu *rdma_stats;
41 struct rtrs_srv_path *srv_path;
46 struct list_head rsp_wr_wait_list;
47 spinlock_t rsp_wr_wait_lock;
50 /* IO context in rtrs_srv, each io has one */
52 struct rtrs_srv_con *con;
55 struct rtrs_msg_rdma_read *rd_msg;
56 struct ib_rdma_wr tx_wr;
58 struct list_head wait_list;
63 * server side memory region context, when always_invalidate=Y, we need
64 * queue_depth of memory region to invalidate each memory region.
69 struct ib_cqe inv_cqe; /* only for always_invalidate=true */
70 u32 msg_id; /* only for always_invalidate=true */
71 u32 msg_off; /* only for always_invalidate=true */
72 struct rtrs_iu *iu; /* send buffer for new rkey msg */
75 struct rtrs_srv_path {
77 struct rtrs_srv_sess *srv;
78 struct work_struct close_work;
79 enum rtrs_srv_state state;
80 spinlock_t state_lock;
82 struct rtrs_srv_op **ops_ids;
83 struct percpu_ref ids_inflight_ref;
84 struct completion complete_done;
85 struct rtrs_srv_mr *mrs;
89 unsigned int mem_bits;
91 struct rtrs_srv_stats *stats;
94 static inline struct rtrs_srv_path *to_srv_path(struct rtrs_path *s)
96 return container_of(s, struct rtrs_srv_path, s);
99 struct rtrs_srv_sess {
100 struct list_head paths_list;
102 struct mutex paths_ev_mutex;
104 struct mutex paths_mutex;
107 struct rtrs_srv_ctx *ctx;
108 struct list_head ctx_list;
111 struct page **chunks;
113 unsigned int dev_ref;
114 struct kobject *kobj_paths;
117 struct rtrs_srv_ctx {
118 struct rtrs_srv_ops ops;
119 struct rdma_cm_id *cm_id_ip;
120 struct rdma_cm_id *cm_id_ib;
121 struct mutex srv_mutex;
122 struct list_head srv_list;
125 struct rtrs_srv_ib_ctx {
126 struct rtrs_srv_ctx *srv_ctx;
128 struct mutex ib_dev_mutex;
132 extern const struct class rtrs_dev_class;
134 void close_path(struct rtrs_srv_path *srv_path);
136 static inline void rtrs_srv_update_rdma_stats(struct rtrs_srv_stats *s,
139 this_cpu_inc(s->rdma_stats->dir[d].cnt);
140 this_cpu_add(s->rdma_stats->dir[d].size_total, size);
143 /* functions which are implemented in rtrs-srv-stats.c */
144 int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable);
145 ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats, char *page);
146 int rtrs_srv_reset_all_stats(struct rtrs_srv_stats *stats, bool enable);
147 ssize_t rtrs_srv_reset_all_help(struct rtrs_srv_stats *stats,
148 char *page, size_t len);
150 /* functions which are implemented in rtrs-srv-sysfs.c */
151 int rtrs_srv_create_path_files(struct rtrs_srv_path *srv_path);
152 void rtrs_srv_destroy_path_files(struct rtrs_srv_path *srv_path);
154 #endif /* RTRS_SRV_H */