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f24e9980 SW |
1 | #ifndef _FS_CEPH_OSD_CLIENT_H |
2 | #define _FS_CEPH_OSD_CLIENT_H | |
3 | ||
4 | #include <linux/completion.h> | |
5 | #include <linux/mempool.h> | |
6 | #include <linux/rbtree.h> | |
7 | ||
8 | #include "types.h" | |
9 | #include "osdmap.h" | |
10 | #include "messenger.h" | |
11 | ||
12 | struct ceph_msg; | |
13 | struct ceph_snap_context; | |
14 | struct ceph_osd_request; | |
15 | struct ceph_osd_client; | |
4e7a5dcd | 16 | struct ceph_authorizer; |
f24e9980 SW |
17 | |
18 | /* | |
19 | * completion callback for async writepages | |
20 | */ | |
21 | typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *, | |
22 | struct ceph_msg *); | |
23 | ||
24 | /* a given osd we're communicating with */ | |
25 | struct ceph_osd { | |
26 | atomic_t o_ref; | |
27 | struct ceph_osd_client *o_osdc; | |
28 | int o_osd; | |
29 | int o_incarnation; | |
30 | struct rb_node o_node; | |
31 | struct ceph_connection o_con; | |
32 | struct list_head o_requests; | |
4e7a5dcd SW |
33 | struct ceph_authorizer *o_authorizer; |
34 | void *o_authorizer_buf, *o_authorizer_reply_buf; | |
35 | size_t o_authorizer_buf_len, o_authorizer_reply_buf_len; | |
f24e9980 SW |
36 | }; |
37 | ||
38 | /* an in-flight request */ | |
39 | struct ceph_osd_request { | |
40 | u64 r_tid; /* unique for this client */ | |
41 | struct rb_node r_node; | |
42 | struct list_head r_osd_item; | |
43 | struct ceph_osd *r_osd; | |
44 | ||
45 | struct ceph_msg *r_request, *r_reply; | |
46 | int r_result; | |
47 | int r_flags; /* any additional flags for the osd */ | |
48 | u32 r_sent; /* >0 if r_request is sending/sent */ | |
49 | int r_prepared_pages, r_got_reply; | |
50 | ||
51 | struct ceph_osd_client *r_osdc; | |
52 | atomic_t r_ref; | |
53 | bool r_mempool; | |
54 | struct completion r_completion, r_safe_completion; | |
55 | ceph_osdc_callback_t r_callback, r_safe_callback; | |
56 | struct ceph_eversion r_reassert_version; | |
57 | struct list_head r_unsafe_item; | |
58 | ||
59 | struct inode *r_inode; /* for use by callbacks */ | |
60 | struct writeback_control *r_wbc; /* ditto */ | |
61 | ||
62 | char r_oid[40]; /* object name */ | |
63 | int r_oid_len; | |
64 | unsigned long r_timeout_stamp; | |
65 | bool r_resend; /* msg send failed, needs retry */ | |
66 | ||
67 | struct ceph_file_layout r_file_layout; | |
68 | struct ceph_snap_context *r_snapc; /* snap context for writes */ | |
69 | unsigned r_num_pages; /* size of page array (follows) */ | |
70 | struct page **r_pages; /* pages for data payload */ | |
71 | int r_pages_from_pool; | |
72 | int r_own_pages; /* if true, i own page list */ | |
73 | }; | |
74 | ||
75 | struct ceph_osd_client { | |
76 | struct ceph_client *client; | |
77 | ||
78 | struct ceph_osdmap *osdmap; /* current map */ | |
79 | struct rw_semaphore map_sem; | |
80 | struct completion map_waiters; | |
81 | u64 last_requested_map; | |
82 | ||
83 | struct mutex request_mutex; | |
84 | struct rb_root osds; /* osds */ | |
85 | u64 timeout_tid; /* tid of timeout triggering rq */ | |
86 | u64 last_tid; /* tid of last request */ | |
87 | struct rb_root requests; /* pending requests */ | |
88 | int num_requests; | |
89 | struct delayed_work timeout_work; | |
039934b8 | 90 | #ifdef CONFIG_DEBUG_FS |
f24e9980 | 91 | struct dentry *debugfs_file; |
039934b8 | 92 | #endif |
f24e9980 SW |
93 | |
94 | mempool_t *req_mempool; | |
95 | ||
96 | struct ceph_msgpool msgpool_op; | |
97 | struct ceph_msgpool msgpool_op_reply; | |
98 | }; | |
99 | ||
100 | extern int ceph_osdc_init(struct ceph_osd_client *osdc, | |
101 | struct ceph_client *client); | |
102 | extern void ceph_osdc_stop(struct ceph_osd_client *osdc); | |
103 | ||
104 | extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, | |
105 | struct ceph_msg *msg); | |
106 | extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, | |
107 | struct ceph_msg *msg); | |
108 | ||
109 | extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, | |
110 | struct ceph_file_layout *layout, | |
111 | struct ceph_vino vino, | |
112 | u64 offset, u64 *len, int op, int flags, | |
113 | struct ceph_snap_context *snapc, | |
114 | int do_sync, u32 truncate_seq, | |
115 | u64 truncate_size, | |
116 | struct timespec *mtime, | |
117 | bool use_mempool, int num_reply); | |
118 | ||
119 | static inline void ceph_osdc_get_request(struct ceph_osd_request *req) | |
120 | { | |
121 | atomic_inc(&req->r_ref); | |
122 | } | |
123 | extern void ceph_osdc_put_request(struct ceph_osd_request *req); | |
124 | ||
125 | extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
126 | struct ceph_osd_request *req, | |
127 | bool nofail); | |
128 | extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
129 | struct ceph_osd_request *req); | |
130 | extern void ceph_osdc_sync(struct ceph_osd_client *osdc); | |
131 | ||
132 | extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
133 | struct ceph_vino vino, | |
134 | struct ceph_file_layout *layout, | |
135 | u64 off, u64 *plen, | |
136 | u32 truncate_seq, u64 truncate_size, | |
137 | struct page **pages, int nr_pages); | |
138 | ||
139 | extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, | |
140 | struct ceph_vino vino, | |
141 | struct ceph_file_layout *layout, | |
142 | struct ceph_snap_context *sc, | |
143 | u64 off, u64 len, | |
144 | u32 truncate_seq, u64 truncate_size, | |
145 | struct timespec *mtime, | |
146 | struct page **pages, int nr_pages, | |
147 | int flags, int do_sync, bool nofail); | |
148 | ||
149 | #endif | |
150 |