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
;
50 /* an in-flight request */
51 struct ceph_osd_request
{
52 u64 r_tid
; /* unique for this client */
53 struct rb_node r_node
;
54 struct list_head r_req_lru_item
;
55 struct list_head r_osd_item
;
56 struct list_head r_linger_item
;
57 struct list_head r_linger_osd
;
58 struct ceph_osd
*r_osd
;
59 struct ceph_pg r_pgid
;
60 int r_pg_osds
[CEPH_PG_MAX_SIZE
];
63 struct ceph_connection
*r_con_filling_msg
;
65 struct ceph_msg
*r_request
, *r_reply
;
67 int r_flags
; /* any additional flags for the osd */
68 u32 r_sent
; /* >0 if r_request is sending/sent */
72 struct ceph_osd_client
*r_osdc
;
75 struct completion r_completion
, r_safe_completion
;
76 ceph_osdc_callback_t r_callback
, r_safe_callback
;
77 struct ceph_eversion r_reassert_version
;
78 struct list_head r_unsafe_item
;
80 struct inode
*r_inode
; /* for use by callbacks */
81 void *r_priv
; /* ditto */
83 char r_oid
[MAX_OBJ_NAME_SIZE
]; /* object name */
85 unsigned long r_stamp
; /* send OR check time */
87 struct ceph_file_layout r_file_layout
;
88 struct ceph_snap_context
*r_snapc
; /* snap context for writes */
89 unsigned r_num_pages
; /* size of page array (follows) */
90 unsigned r_page_alignment
; /* io offset in first page */
91 struct page
**r_pages
; /* pages for data payload */
92 int r_pages_from_pool
;
93 int r_own_pages
; /* if true, i own page list */
95 struct bio
*r_bio
; /* instead of pages */
98 struct ceph_pagelist r_trail
; /* trailing part of the data */
101 struct ceph_osd_event
{
104 struct ceph_osd_client
*osdc
;
105 void (*cb
)(u64
, u64
, u8
, void *);
108 struct list_head osd_node
;
110 struct completion completion
;
113 struct ceph_osd_event_work
{
114 struct work_struct work
;
115 struct ceph_osd_event
*event
;
121 struct ceph_osd_client
{
122 struct ceph_client
*client
;
124 struct ceph_osdmap
*osdmap
; /* current map */
125 struct rw_semaphore map_sem
;
126 struct completion map_waiters
;
127 u64 last_requested_map
;
129 struct mutex request_mutex
;
130 struct rb_root osds
; /* osds */
131 struct list_head osd_lru
; /* idle osds */
132 u64 timeout_tid
; /* tid of timeout triggering rq */
133 u64 last_tid
; /* tid of last request */
134 struct rb_root requests
; /* pending requests */
135 struct list_head req_lru
; /* in-flight lru */
136 struct list_head req_unsent
; /* unsent/need-resend queue */
137 struct list_head req_notarget
; /* map to no osd */
138 struct list_head req_linger
; /* lingering requests */
140 struct delayed_work timeout_work
;
141 struct delayed_work osds_timeout_work
;
142 #ifdef CONFIG_DEBUG_FS
143 struct dentry
*debugfs_file
;
146 mempool_t
*req_mempool
;
148 struct ceph_msgpool msgpool_op
;
149 struct ceph_msgpool msgpool_op_reply
;
151 spinlock_t event_lock
;
152 struct rb_root event_tree
;
155 struct workqueue_struct
*notify_wq
;
158 struct ceph_osd_req_op
{
159 u16 op
; /* CEPH_OSD_OP_* */
171 __u8 cmp_op
; /* CEPH_OSD_CMPXATTR_OP_* */
172 __u8 cmp_mode
; /* CEPH_OSD_CMPXATTR_MODE_* */
175 const char *class_name
;
177 const char *method_name
;
200 extern int ceph_osdc_init(struct ceph_osd_client
*osdc
,
201 struct ceph_client
*client
);
202 extern void ceph_osdc_stop(struct ceph_osd_client
*osdc
);
204 extern void ceph_osdc_handle_reply(struct ceph_osd_client
*osdc
,
205 struct ceph_msg
*msg
);
206 extern void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
,
207 struct ceph_msg
*msg
);
209 extern int ceph_calc_raw_layout(struct ceph_file_layout
*layout
,
210 u64 off
, u64
*plen
, u64
*bno
,
211 struct ceph_osd_request
*req
,
212 struct ceph_osd_req_op
*op
);
214 extern struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client
*osdc
,
215 struct ceph_snap_context
*snapc
,
220 extern void ceph_osdc_build_request(struct ceph_osd_request
*req
,
223 struct ceph_osd_req_op
*src_ops
,
224 struct ceph_snap_context
*snapc
,
226 struct timespec
*mtime
);
228 extern struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*,
229 struct ceph_file_layout
*layout
,
230 struct ceph_vino vino
,
231 u64 offset
, u64
*len
, int op
, int flags
,
232 struct ceph_snap_context
*snapc
,
233 int do_sync
, u32 truncate_seq
,
235 struct timespec
*mtime
,
236 bool use_mempool
, int num_reply
,
239 extern void ceph_osdc_set_request_linger(struct ceph_osd_client
*osdc
,
240 struct ceph_osd_request
*req
);
241 extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client
*osdc
,
242 struct ceph_osd_request
*req
);
244 static inline void ceph_osdc_get_request(struct ceph_osd_request
*req
)
246 kref_get(&req
->r_kref
);
248 extern void ceph_osdc_release_request(struct kref
*kref
);
249 static inline void ceph_osdc_put_request(struct ceph_osd_request
*req
)
251 kref_put(&req
->r_kref
, ceph_osdc_release_request
);
254 extern int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
255 struct ceph_osd_request
*req
,
257 extern int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
258 struct ceph_osd_request
*req
);
259 extern void ceph_osdc_sync(struct ceph_osd_client
*osdc
);
261 extern int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
262 struct ceph_vino vino
,
263 struct ceph_file_layout
*layout
,
265 u32 truncate_seq
, u64 truncate_size
,
266 struct page
**pages
, int nr_pages
,
269 extern int ceph_osdc_writepages(struct ceph_osd_client
*osdc
,
270 struct ceph_vino vino
,
271 struct ceph_file_layout
*layout
,
272 struct ceph_snap_context
*sc
,
274 u32 truncate_seq
, u64 truncate_size
,
275 struct timespec
*mtime
,
276 struct page
**pages
, int nr_pages
,
277 int flags
, int do_sync
, bool nofail
);
279 /* watch/notify events */
280 extern int ceph_osdc_create_event(struct ceph_osd_client
*osdc
,
281 void (*event_cb
)(u64
, u64
, u8
, void *),
282 int one_shot
, void *data
,
283 struct ceph_osd_event
**pevent
);
284 extern void ceph_osdc_cancel_event(struct ceph_osd_event
*event
);
285 extern int ceph_osdc_wait_event(struct ceph_osd_event
*event
,
286 unsigned long timeout
);
287 extern void ceph_osdc_put_event(struct ceph_osd_event
*event
);