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 /* an in-flight request */
54 struct ceph_osd_request
{
55 u64 r_tid
; /* unique for this client */
56 struct rb_node r_node
;
57 struct list_head r_req_lru_item
;
58 struct list_head r_osd_item
;
59 struct list_head r_linger_item
;
60 struct list_head r_linger_osd
;
61 struct ceph_osd
*r_osd
;
62 struct ceph_pg r_pgid
;
63 int r_pg_osds
[CEPH_PG_MAX_SIZE
];
66 struct ceph_connection
*r_con_filling_msg
;
68 struct ceph_msg
*r_request
, *r_reply
;
69 int r_flags
; /* any additional flags for the osd */
70 u32 r_sent
; /* >0 if r_request is sending/sent */
73 /* encoded message content */
74 struct ceph_osd_op
*r_request_ops
;
75 /* these are updated on each send */
76 __le32
*r_request_osdmap_epoch
;
77 __le32
*r_request_flags
;
78 __le64
*r_request_pool
;
80 __le32
*r_request_attempts
;
81 struct ceph_eversion
*r_request_reassert_version
;
84 int r_reply_op_len
[CEPH_OSD_MAX_OP
];
85 s32 r_reply_op_result
[CEPH_OSD_MAX_OP
];
89 struct ceph_osd_client
*r_osdc
;
92 struct completion r_completion
, r_safe_completion
;
93 ceph_osdc_callback_t r_callback
, r_safe_callback
;
94 struct ceph_eversion r_reassert_version
;
95 struct list_head r_unsafe_item
;
97 struct inode
*r_inode
; /* for use by callbacks */
98 void *r_priv
; /* ditto */
100 char r_oid
[MAX_OBJ_NAME_SIZE
]; /* object name */
103 unsigned long r_stamp
; /* send OR check time */
105 struct ceph_file_layout r_file_layout
;
106 struct ceph_snap_context
*r_snapc
; /* snap context for writes */
107 unsigned r_num_pages
; /* size of page array (follows) */
108 unsigned r_page_alignment
; /* io offset in first page */
109 struct page
**r_pages
; /* pages for data payload */
110 int r_pages_from_pool
;
111 int r_own_pages
; /* if true, i own page list */
113 struct bio
*r_bio
; /* instead of pages */
116 struct ceph_pagelist r_trail
; /* trailing part of the data */
119 struct ceph_osd_event
{
122 struct ceph_osd_client
*osdc
;
123 void (*cb
)(u64
, u64
, u8
, void *);
126 struct list_head osd_node
;
130 struct ceph_osd_event_work
{
131 struct work_struct work
;
132 struct ceph_osd_event
*event
;
138 struct ceph_osd_client
{
139 struct ceph_client
*client
;
141 struct ceph_osdmap
*osdmap
; /* current map */
142 struct rw_semaphore map_sem
;
143 struct completion map_waiters
;
144 u64 last_requested_map
;
146 struct mutex request_mutex
;
147 struct rb_root osds
; /* osds */
148 struct list_head osd_lru
; /* idle osds */
149 u64 timeout_tid
; /* tid of timeout triggering rq */
150 u64 last_tid
; /* tid of last request */
151 struct rb_root requests
; /* pending requests */
152 struct list_head req_lru
; /* in-flight lru */
153 struct list_head req_unsent
; /* unsent/need-resend queue */
154 struct list_head req_notarget
; /* map to no osd */
155 struct list_head req_linger
; /* lingering requests */
157 struct delayed_work timeout_work
;
158 struct delayed_work osds_timeout_work
;
159 #ifdef CONFIG_DEBUG_FS
160 struct dentry
*debugfs_file
;
163 mempool_t
*req_mempool
;
165 struct ceph_msgpool msgpool_op
;
166 struct ceph_msgpool msgpool_op_reply
;
168 spinlock_t event_lock
;
169 struct rb_root event_tree
;
172 struct workqueue_struct
*notify_wq
;
175 struct ceph_osd_req_op
{
176 u16 op
; /* CEPH_OSD_OP_* */
189 __u8 cmp_op
; /* CEPH_OSD_CMPXATTR_OP_* */
190 __u8 cmp_mode
; /* CEPH_OSD_CMPXATTR_MODE_* */
193 const char *class_name
;
194 const char *method_name
;
218 extern int ceph_osdc_init(struct ceph_osd_client
*osdc
,
219 struct ceph_client
*client
);
220 extern void ceph_osdc_stop(struct ceph_osd_client
*osdc
);
222 extern void ceph_osdc_handle_reply(struct ceph_osd_client
*osdc
,
223 struct ceph_msg
*msg
);
224 extern void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
,
225 struct ceph_msg
*msg
);
227 extern struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client
*osdc
,
228 struct ceph_snap_context
*snapc
,
233 extern void ceph_osdc_build_request(struct ceph_osd_request
*req
,
236 struct ceph_osd_req_op
*src_ops
,
237 struct ceph_snap_context
*snapc
,
239 struct timespec
*mtime
);
241 extern struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*,
242 struct ceph_file_layout
*layout
,
243 struct ceph_vino vino
,
244 u64 offset
, u64
*len
, int op
, int flags
,
245 struct ceph_snap_context
*snapc
,
246 int do_sync
, u32 truncate_seq
,
248 struct timespec
*mtime
,
249 bool use_mempool
, int page_align
);
251 extern void ceph_osdc_set_request_linger(struct ceph_osd_client
*osdc
,
252 struct ceph_osd_request
*req
);
253 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client
*osdc
,
254 struct ceph_osd_request
*req
);
256 static inline void ceph_osdc_get_request(struct ceph_osd_request
*req
)
258 kref_get(&req
->r_kref
);
260 extern void ceph_osdc_release_request(struct kref
*kref
);
261 static inline void ceph_osdc_put_request(struct ceph_osd_request
*req
)
263 kref_put(&req
->r_kref
, ceph_osdc_release_request
);
266 extern int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
267 struct ceph_osd_request
*req
,
269 extern int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
270 struct ceph_osd_request
*req
);
271 extern void ceph_osdc_sync(struct ceph_osd_client
*osdc
);
273 extern int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
274 struct ceph_vino vino
,
275 struct ceph_file_layout
*layout
,
277 u32 truncate_seq
, u64 truncate_size
,
278 struct page
**pages
, int nr_pages
,
281 extern int ceph_osdc_writepages(struct ceph_osd_client
*osdc
,
282 struct ceph_vino vino
,
283 struct ceph_file_layout
*layout
,
284 struct ceph_snap_context
*sc
,
286 u32 truncate_seq
, u64 truncate_size
,
287 struct timespec
*mtime
,
288 struct page
**pages
, int nr_pages
);
290 /* watch/notify events */
291 extern int ceph_osdc_create_event(struct ceph_osd_client
*osdc
,
292 void (*event_cb
)(u64
, u64
, u8
, void *),
293 void *data
, struct ceph_osd_event
**pevent
);
294 extern void ceph_osdc_cancel_event(struct ceph_osd_event
*event
);
295 extern void ceph_osdc_put_event(struct ceph_osd_event
*event
);