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>
11 #include "messenger.h"
14 struct ceph_snap_context
;
15 struct ceph_osd_request
;
16 struct ceph_osd_client
;
17 struct ceph_authorizer
;
20 * completion callback for async writepages
22 typedef void (*ceph_osdc_callback_t
)(struct ceph_osd_request
*,
25 /* a given osd we're communicating with */
28 struct ceph_osd_client
*o_osdc
;
31 struct rb_node o_node
;
32 struct ceph_connection o_con
;
33 struct list_head o_requests
;
34 struct list_head o_osd_lru
;
35 struct ceph_authorizer
*o_authorizer
;
36 void *o_authorizer_buf
, *o_authorizer_reply_buf
;
37 size_t o_authorizer_buf_len
, o_authorizer_reply_buf_len
;
38 unsigned long lru_ttl
;
39 int o_marked_for_keepalive
;
40 struct list_head o_keepalive_item
;
43 /* an in-flight request */
44 struct ceph_osd_request
{
45 u64 r_tid
; /* unique for this client */
46 struct rb_node r_node
;
47 struct list_head r_req_lru_item
;
48 struct list_head r_osd_item
;
49 struct ceph_osd
*r_osd
;
50 struct ceph_pg r_pgid
;
52 struct ceph_connection
*r_con_filling_msg
;
54 struct ceph_msg
*r_request
, *r_reply
;
56 int r_flags
; /* any additional flags for the osd */
57 u32 r_sent
; /* >0 if r_request is sending/sent */
60 struct ceph_osd_client
*r_osdc
;
63 struct completion r_completion
, r_safe_completion
;
64 ceph_osdc_callback_t r_callback
, r_safe_callback
;
65 struct ceph_eversion r_reassert_version
;
66 struct list_head r_unsafe_item
;
68 struct inode
*r_inode
; /* for use by callbacks */
70 char r_oid
[40]; /* object name */
72 unsigned long r_stamp
; /* send OR check time */
73 bool r_resend
; /* msg send failed, needs retry */
75 struct ceph_file_layout r_file_layout
;
76 struct ceph_snap_context
*r_snapc
; /* snap context for writes */
77 unsigned r_num_pages
; /* size of page array (follows) */
78 struct page
**r_pages
; /* pages for data payload */
79 int r_pages_from_pool
;
80 int r_own_pages
; /* if true, i own page list */
83 struct ceph_osd_client
{
84 struct ceph_client
*client
;
86 struct ceph_osdmap
*osdmap
; /* current map */
87 struct rw_semaphore map_sem
;
88 struct completion map_waiters
;
89 u64 last_requested_map
;
91 struct mutex request_mutex
;
92 struct rb_root osds
; /* osds */
93 struct list_head osd_lru
; /* idle osds */
94 u64 timeout_tid
; /* tid of timeout triggering rq */
95 u64 last_tid
; /* tid of last request */
96 struct rb_root requests
; /* pending requests */
97 struct list_head req_lru
; /* pending requests lru */
99 struct delayed_work timeout_work
;
100 struct delayed_work osds_timeout_work
;
101 #ifdef CONFIG_DEBUG_FS
102 struct dentry
*debugfs_file
;
105 mempool_t
*req_mempool
;
107 struct ceph_msgpool msgpool_op
;
108 struct ceph_msgpool msgpool_op_reply
;
111 extern int ceph_osdc_init(struct ceph_osd_client
*osdc
,
112 struct ceph_client
*client
);
113 extern void ceph_osdc_stop(struct ceph_osd_client
*osdc
);
115 extern void ceph_osdc_handle_reply(struct ceph_osd_client
*osdc
,
116 struct ceph_msg
*msg
);
117 extern void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
,
118 struct ceph_msg
*msg
);
120 extern struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*,
121 struct ceph_file_layout
*layout
,
122 struct ceph_vino vino
,
123 u64 offset
, u64
*len
, int op
, int flags
,
124 struct ceph_snap_context
*snapc
,
125 int do_sync
, u32 truncate_seq
,
127 struct timespec
*mtime
,
128 bool use_mempool
, int num_reply
);
130 static inline void ceph_osdc_get_request(struct ceph_osd_request
*req
)
132 kref_get(&req
->r_kref
);
134 extern void ceph_osdc_release_request(struct kref
*kref
);
135 static inline void ceph_osdc_put_request(struct ceph_osd_request
*req
)
137 kref_put(&req
->r_kref
, ceph_osdc_release_request
);
140 extern int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
141 struct ceph_osd_request
*req
,
143 extern int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
144 struct ceph_osd_request
*req
);
145 extern void ceph_osdc_sync(struct ceph_osd_client
*osdc
);
147 extern int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
148 struct ceph_vino vino
,
149 struct ceph_file_layout
*layout
,
151 u32 truncate_seq
, u64 truncate_size
,
152 struct page
**pages
, int nr_pages
);
154 extern int ceph_osdc_writepages(struct ceph_osd_client
*osdc
,
155 struct ceph_vino vino
,
156 struct ceph_file_layout
*layout
,
157 struct ceph_snap_context
*sc
,
159 u32 truncate_seq
, u64 truncate_size
,
160 struct timespec
*mtime
,
161 struct page
**pages
, int nr_pages
,
162 int flags
, int do_sync
, bool nofail
);