1 #ifndef _FS_CEPH_OSD_CLIENT_H
2 #define _FS_CEPH_OSD_CLIENT_H
4 #include <linux/completion.h>
5 #include <linux/kref.h>
6 #include <linux/mempool.h>
7 #include <linux/rbtree.h>
9 #include <linux/ceph/types.h>
10 #include <linux/ceph/osdmap.h>
11 #include <linux/ceph/messenger.h>
12 #include <linux/ceph/auth.h>
13 #include <linux/ceph/pagelist.h>
16 * Maximum object name size
17 * (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
19 #define MAX_OBJ_NAME_SIZE 100
22 struct ceph_snap_context
;
23 struct ceph_osd_request
;
24 struct ceph_osd_client
;
25 struct ceph_authorizer
;
28 * completion callback for async writepages
30 typedef void (*ceph_osdc_callback_t
)(struct ceph_osd_request
*,
33 /* a given osd we're communicating with */
36 struct ceph_osd_client
*o_osdc
;
39 struct rb_node o_node
;
40 struct ceph_connection o_con
;
41 struct list_head o_requests
;
42 struct list_head o_linger_requests
;
43 struct list_head o_osd_lru
;
44 struct ceph_auth_handshake o_auth
;
45 unsigned long lru_ttl
;
46 int o_marked_for_keepalive
;
47 struct list_head o_keepalive_item
;
51 #define CEPH_OSD_MAX_OP 10
53 enum ceph_osd_data_type
{
54 CEPH_OSD_DATA_TYPE_NONE
,
55 CEPH_OSD_DATA_TYPE_PAGES
,
57 CEPH_OSD_DATA_TYPE_BIO
,
58 #endif /* CONFIG_BLOCK */
61 struct ceph_osd_data
{
62 enum ceph_osd_data_type type
;
73 #endif /* CONFIG_BLOCK */
77 /* an in-flight request */
78 struct ceph_osd_request
{
79 u64 r_tid
; /* unique for this client */
80 struct rb_node r_node
;
81 struct list_head r_req_lru_item
;
82 struct list_head r_osd_item
;
83 struct list_head r_linger_item
;
84 struct list_head r_linger_osd
;
85 struct ceph_osd
*r_osd
;
86 struct ceph_pg r_pgid
;
87 int r_pg_osds
[CEPH_PG_MAX_SIZE
];
90 struct ceph_connection
*r_con_filling_msg
;
92 struct ceph_msg
*r_request
, *r_reply
;
93 int r_flags
; /* any additional flags for the osd */
94 u32 r_sent
; /* >0 if r_request is sending/sent */
97 /* encoded message content */
98 struct ceph_osd_op
*r_request_ops
;
99 /* these are updated on each send */
100 __le32
*r_request_osdmap_epoch
;
101 __le32
*r_request_flags
;
102 __le64
*r_request_pool
;
103 void *r_request_pgid
;
104 __le32
*r_request_attempts
;
105 struct ceph_eversion
*r_request_reassert_version
;
108 int r_reply_op_len
[CEPH_OSD_MAX_OP
];
109 s32 r_reply_op_result
[CEPH_OSD_MAX_OP
];
114 struct ceph_osd_client
*r_osdc
;
117 struct completion r_completion
, r_safe_completion
;
118 ceph_osdc_callback_t r_callback
, r_safe_callback
;
119 struct ceph_eversion r_reassert_version
;
120 struct list_head r_unsafe_item
;
122 struct inode
*r_inode
; /* for use by callbacks */
123 void *r_priv
; /* ditto */
125 char r_oid
[MAX_OBJ_NAME_SIZE
]; /* object name */
128 unsigned long r_stamp
; /* send OR check time */
130 struct ceph_file_layout r_file_layout
;
131 struct ceph_snap_context
*r_snapc
; /* snap context for writes */
133 struct ceph_osd_data r_data_in
;
134 struct ceph_osd_data r_data_out
;
135 struct ceph_pagelist r_trail
; /* trailing part of data out */
138 struct ceph_osd_event
{
141 struct ceph_osd_client
*osdc
;
142 void (*cb
)(u64
, u64
, u8
, void *);
145 struct list_head osd_node
;
149 struct ceph_osd_event_work
{
150 struct work_struct work
;
151 struct ceph_osd_event
*event
;
157 struct ceph_osd_client
{
158 struct ceph_client
*client
;
160 struct ceph_osdmap
*osdmap
; /* current map */
161 struct rw_semaphore map_sem
;
162 struct completion map_waiters
;
163 u64 last_requested_map
;
165 struct mutex request_mutex
;
166 struct rb_root osds
; /* osds */
167 struct list_head osd_lru
; /* idle osds */
168 u64 timeout_tid
; /* tid of timeout triggering rq */
169 u64 last_tid
; /* tid of last request */
170 struct rb_root requests
; /* pending requests */
171 struct list_head req_lru
; /* in-flight lru */
172 struct list_head req_unsent
; /* unsent/need-resend queue */
173 struct list_head req_notarget
; /* map to no osd */
174 struct list_head req_linger
; /* lingering requests */
176 struct delayed_work timeout_work
;
177 struct delayed_work osds_timeout_work
;
178 #ifdef CONFIG_DEBUG_FS
179 struct dentry
*debugfs_file
;
182 mempool_t
*req_mempool
;
184 struct ceph_msgpool msgpool_op
;
185 struct ceph_msgpool msgpool_op_reply
;
187 spinlock_t event_lock
;
188 struct rb_root event_tree
;
191 struct workqueue_struct
*notify_wq
;
194 struct ceph_osd_req_op
{
195 u16 op
; /* CEPH_OSD_OP_* */
208 __u8 cmp_op
; /* CEPH_OSD_CMPXATTR_OP_* */
209 __u8 cmp_mode
; /* CEPH_OSD_CMPXATTR_MODE_* */
212 const char *class_name
;
213 const char *method_name
;
237 extern int ceph_osdc_init(struct ceph_osd_client
*osdc
,
238 struct ceph_client
*client
);
239 extern void ceph_osdc_stop(struct ceph_osd_client
*osdc
);
241 extern void ceph_osdc_handle_reply(struct ceph_osd_client
*osdc
,
242 struct ceph_msg
*msg
);
243 extern void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
,
244 struct ceph_msg
*msg
);
246 extern struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client
*osdc
,
247 struct ceph_snap_context
*snapc
,
252 extern void ceph_osdc_build_request(struct ceph_osd_request
*req
,
255 struct ceph_osd_req_op
*src_ops
,
256 struct ceph_snap_context
*snapc
,
258 struct timespec
*mtime
);
260 extern struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*,
261 struct ceph_file_layout
*layout
,
262 struct ceph_vino vino
,
263 u64 offset
, u64
*len
, int op
, int flags
,
264 struct ceph_snap_context
*snapc
,
265 int do_sync
, u32 truncate_seq
,
267 struct timespec
*mtime
,
270 extern void ceph_osdc_set_request_linger(struct ceph_osd_client
*osdc
,
271 struct ceph_osd_request
*req
);
272 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client
*osdc
,
273 struct ceph_osd_request
*req
);
275 static inline void ceph_osdc_get_request(struct ceph_osd_request
*req
)
277 kref_get(&req
->r_kref
);
279 extern void ceph_osdc_release_request(struct kref
*kref
);
280 static inline void ceph_osdc_put_request(struct ceph_osd_request
*req
)
282 kref_put(&req
->r_kref
, ceph_osdc_release_request
);
285 extern int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
286 struct ceph_osd_request
*req
,
288 extern int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
289 struct ceph_osd_request
*req
);
290 extern void ceph_osdc_sync(struct ceph_osd_client
*osdc
);
292 extern int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
293 struct ceph_vino vino
,
294 struct ceph_file_layout
*layout
,
296 u32 truncate_seq
, u64 truncate_size
,
297 struct page
**pages
, int nr_pages
,
300 extern int ceph_osdc_writepages(struct ceph_osd_client
*osdc
,
301 struct ceph_vino vino
,
302 struct ceph_file_layout
*layout
,
303 struct ceph_snap_context
*sc
,
305 u32 truncate_seq
, u64 truncate_size
,
306 struct timespec
*mtime
,
307 struct page
**pages
, int nr_pages
);
309 /* watch/notify events */
310 extern int ceph_osdc_create_event(struct ceph_osd_client
*osdc
,
311 void (*event_cb
)(u64
, u64
, u8
, void *),
312 void *data
, struct ceph_osd_event
**pevent
);
313 extern void ceph_osdc_cancel_event(struct ceph_osd_event
*event
);
314 extern void ceph_osdc_put_event(struct ceph_osd_event
*event
);