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
*,
32 typedef void (*ceph_osdc_unsafe_callback_t
)(struct ceph_osd_request
*, bool);
34 /* a given osd we're communicating with */
37 struct ceph_osd_client
*o_osdc
;
40 struct rb_node o_node
;
41 struct ceph_connection o_con
;
42 struct list_head o_requests
;
43 struct list_head o_linger_requests
;
44 struct list_head o_osd_lru
;
45 struct ceph_auth_handshake o_auth
;
46 unsigned long lru_ttl
;
47 int o_marked_for_keepalive
;
48 struct list_head o_keepalive_item
;
52 #define CEPH_OSD_MAX_OP 2
54 enum ceph_osd_data_type
{
55 CEPH_OSD_DATA_TYPE_NONE
= 0,
56 CEPH_OSD_DATA_TYPE_PAGES
,
57 CEPH_OSD_DATA_TYPE_PAGELIST
,
59 CEPH_OSD_DATA_TYPE_BIO
,
60 #endif /* CONFIG_BLOCK */
63 struct ceph_osd_data
{
64 enum ceph_osd_data_type type
;
73 struct ceph_pagelist
*pagelist
;
76 struct bio
*bio
; /* list of bios */
77 size_t bio_length
; /* total in list */
79 #endif /* CONFIG_BLOCK */
83 struct ceph_osd_req_op
{
84 u16 op
; /* CEPH_OSD_OP_* */
87 struct ceph_osd_data raw_data_in
;
92 struct ceph_osd_data osd_data
;
95 const char *class_name
;
96 const char *method_name
;
97 struct ceph_osd_data request_info
;
98 struct ceph_osd_data request_data
;
99 struct ceph_osd_data response_data
;
114 /* an in-flight request */
115 struct ceph_osd_request
{
116 u64 r_tid
; /* unique for this client */
117 struct rb_node r_node
;
118 struct list_head r_req_lru_item
;
119 struct list_head r_osd_item
;
120 struct list_head r_linger_item
;
121 struct list_head r_linger_osd
;
122 struct ceph_osd
*r_osd
;
123 struct ceph_pg r_pgid
;
124 int r_pg_osds
[CEPH_PG_MAX_SIZE
];
127 struct ceph_msg
*r_request
, *r_reply
;
128 int r_flags
; /* any additional flags for the osd */
129 u32 r_sent
; /* >0 if r_request is sending/sent */
131 /* request osd ops array */
132 unsigned int r_num_ops
;
133 struct ceph_osd_req_op r_ops
[CEPH_OSD_MAX_OP
];
135 /* these are updated on each send */
136 __le32
*r_request_osdmap_epoch
;
137 __le32
*r_request_flags
;
138 __le64
*r_request_pool
;
139 void *r_request_pgid
;
140 __le32
*r_request_attempts
;
142 struct ceph_eversion
*r_request_reassert_version
;
145 int r_reply_op_len
[CEPH_OSD_MAX_OP
];
146 s32 r_reply_op_result
[CEPH_OSD_MAX_OP
];
150 struct ceph_osd_client
*r_osdc
;
153 struct completion r_completion
, r_safe_completion
;
154 ceph_osdc_callback_t r_callback
;
155 ceph_osdc_unsafe_callback_t r_unsafe_callback
;
156 struct ceph_eversion r_reassert_version
;
157 struct list_head r_unsafe_item
;
159 struct inode
*r_inode
; /* for use by callbacks */
160 void *r_priv
; /* ditto */
162 char r_oid
[MAX_OBJ_NAME_SIZE
]; /* object name */
165 unsigned long r_stamp
; /* send OR check time */
167 struct ceph_file_layout r_file_layout
;
168 struct ceph_snap_context
*r_snapc
; /* snap context for writes */
171 struct ceph_osd_event
{
174 struct ceph_osd_client
*osdc
;
175 void (*cb
)(u64
, u64
, u8
, void *);
178 struct list_head osd_node
;
182 struct ceph_osd_event_work
{
183 struct work_struct work
;
184 struct ceph_osd_event
*event
;
190 struct ceph_osd_client
{
191 struct ceph_client
*client
;
193 struct ceph_osdmap
*osdmap
; /* current map */
194 struct rw_semaphore map_sem
;
195 struct completion map_waiters
;
196 u64 last_requested_map
;
198 struct mutex request_mutex
;
199 struct rb_root osds
; /* osds */
200 struct list_head osd_lru
; /* idle osds */
201 u64 timeout_tid
; /* tid of timeout triggering rq */
202 u64 last_tid
; /* tid of last request */
203 struct rb_root requests
; /* pending requests */
204 struct list_head req_lru
; /* in-flight lru */
205 struct list_head req_unsent
; /* unsent/need-resend queue */
206 struct list_head req_notarget
; /* map to no osd */
207 struct list_head req_linger
; /* lingering requests */
209 struct delayed_work timeout_work
;
210 struct delayed_work osds_timeout_work
;
211 #ifdef CONFIG_DEBUG_FS
212 struct dentry
*debugfs_file
;
215 mempool_t
*req_mempool
;
217 struct ceph_msgpool msgpool_op
;
218 struct ceph_msgpool msgpool_op_reply
;
220 spinlock_t event_lock
;
221 struct rb_root event_tree
;
224 struct workqueue_struct
*notify_wq
;
227 extern int ceph_osdc_setup(void);
228 extern void ceph_osdc_cleanup(void);
230 extern int ceph_osdc_init(struct ceph_osd_client
*osdc
,
231 struct ceph_client
*client
);
232 extern void ceph_osdc_stop(struct ceph_osd_client
*osdc
);
234 extern void ceph_osdc_handle_reply(struct ceph_osd_client
*osdc
,
235 struct ceph_msg
*msg
);
236 extern void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
,
237 struct ceph_msg
*msg
);
239 extern void osd_req_op_init(struct ceph_osd_request
*osd_req
,
240 unsigned int which
, u16 opcode
);
242 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request
*,
244 struct page
**pages
, u64 length
,
245 u32 alignment
, bool pages_from_pool
,
248 extern void osd_req_op_extent_init(struct ceph_osd_request
*osd_req
,
249 unsigned int which
, u16 opcode
,
250 u64 offset
, u64 length
,
251 u64 truncate_size
, u32 truncate_seq
);
252 extern void osd_req_op_extent_update(struct ceph_osd_request
*osd_req
,
253 unsigned int which
, u64 length
);
255 extern struct ceph_osd_data
*osd_req_op_extent_osd_data(
256 struct ceph_osd_request
*osd_req
,
258 extern struct ceph_osd_data
*osd_req_op_cls_response_data(
259 struct ceph_osd_request
*osd_req
,
262 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request
*,
264 struct page
**pages
, u64 length
,
265 u32 alignment
, bool pages_from_pool
,
267 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request
*,
269 struct ceph_pagelist
*pagelist
);
271 extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request
*,
273 struct bio
*bio
, size_t bio_length
);
274 #endif /* CONFIG_BLOCK */
276 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request
*,
278 struct ceph_pagelist
*pagelist
);
279 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request
*,
281 struct page
**pages
, u64 length
,
282 u32 alignment
, bool pages_from_pool
,
284 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request
*,
286 struct page
**pages
, u64 length
,
287 u32 alignment
, bool pages_from_pool
,
290 extern void osd_req_op_cls_init(struct ceph_osd_request
*osd_req
,
291 unsigned int which
, u16 opcode
,
292 const char *class, const char *method
);
293 extern void osd_req_op_watch_init(struct ceph_osd_request
*osd_req
,
294 unsigned int which
, u16 opcode
,
295 u64 cookie
, u64 version
, int flag
);
297 extern struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client
*osdc
,
298 struct ceph_snap_context
*snapc
,
299 unsigned int num_ops
,
303 extern void ceph_osdc_build_request(struct ceph_osd_request
*req
, u64 off
,
304 struct ceph_snap_context
*snapc
,
306 struct timespec
*mtime
);
308 extern struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*,
309 struct ceph_file_layout
*layout
,
310 struct ceph_vino vino
,
311 u64 offset
, u64
*len
,
312 int num_ops
, int opcode
, int flags
,
313 struct ceph_snap_context
*snapc
,
314 u32 truncate_seq
, u64 truncate_size
,
317 extern void ceph_osdc_set_request_linger(struct ceph_osd_client
*osdc
,
318 struct ceph_osd_request
*req
);
319 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client
*osdc
,
320 struct ceph_osd_request
*req
);
322 static inline void ceph_osdc_get_request(struct ceph_osd_request
*req
)
324 kref_get(&req
->r_kref
);
326 extern void ceph_osdc_release_request(struct kref
*kref
);
327 static inline void ceph_osdc_put_request(struct ceph_osd_request
*req
)
329 kref_put(&req
->r_kref
, ceph_osdc_release_request
);
332 extern int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
333 struct ceph_osd_request
*req
,
335 extern int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
336 struct ceph_osd_request
*req
);
337 extern void ceph_osdc_sync(struct ceph_osd_client
*osdc
);
339 extern void ceph_osdc_flush_notifies(struct ceph_osd_client
*osdc
);
341 extern int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
342 struct ceph_vino vino
,
343 struct ceph_file_layout
*layout
,
345 u32 truncate_seq
, u64 truncate_size
,
346 struct page
**pages
, int nr_pages
,
349 extern int ceph_osdc_writepages(struct ceph_osd_client
*osdc
,
350 struct ceph_vino vino
,
351 struct ceph_file_layout
*layout
,
352 struct ceph_snap_context
*sc
,
354 u32 truncate_seq
, u64 truncate_size
,
355 struct timespec
*mtime
,
356 struct page
**pages
, int nr_pages
);
358 /* watch/notify events */
359 extern int ceph_osdc_create_event(struct ceph_osd_client
*osdc
,
360 void (*event_cb
)(u64
, u64
, u8
, void *),
361 void *data
, struct ceph_osd_event
**pevent
);
362 extern void ceph_osdc_cancel_event(struct ceph_osd_event
*event
);
363 extern void ceph_osdc_put_event(struct ceph_osd_event
*event
);