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gerrit-public.fairphone.software / kernel / msm-4.9 / 039934b895c89c2bb40aa5132efe00e60b70efca / . / fs / ceph / osd_client.h
blob: 766c8dc80aff9bb213ecd99b4fab1d26241bea2c [file] [log] [blame]
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]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
12struct ceph_msg;
13struct ceph_snap_context;
14struct ceph_osd_request;
15struct ceph_osd_client;
16
17/*
18 * completion callback for async writepages
19 */
20typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
21 struct ceph_msg *);
22
23/* a given osd we're communicating with */
24struct ceph_osd {
25 atomic_t o_ref;
26 struct ceph_osd_client *o_osdc;
27 int o_osd;
28 int o_incarnation;
29 struct rb_node o_node;
30 struct ceph_connection o_con;
31 struct list_head o_requests;
32};
33
34/* an in-flight request */
35struct ceph_osd_request {
36 u64 r_tid; /* unique for this client */
37 struct rb_node r_node;
38 struct list_head r_osd_item;
39 struct ceph_osd *r_osd;
40
41 struct ceph_msg *r_request, *r_reply;
42 int r_result;
43 int r_flags; /* any additional flags for the osd */
44 u32 r_sent; /* >0 if r_request is sending/sent */
45 int r_prepared_pages, r_got_reply;
46
47 struct ceph_osd_client *r_osdc;
48 atomic_t r_ref;
49 bool r_mempool;
50 struct completion r_completion, r_safe_completion;
51 ceph_osdc_callback_t r_callback, r_safe_callback;
52 struct ceph_eversion r_reassert_version;
53 struct list_head r_unsafe_item;
54
55 struct inode *r_inode; /* for use by callbacks */
56 struct writeback_control *r_wbc; /* ditto */
57
58 char r_oid[40]; /* object name */
59 int r_oid_len;
60 unsigned long r_timeout_stamp;
61 bool r_resend; /* msg send failed, needs retry */
62
63 struct ceph_file_layout r_file_layout;
64 struct ceph_snap_context *r_snapc; /* snap context for writes */
65 unsigned r_num_pages; /* size of page array (follows) */
66 struct page **r_pages; /* pages for data payload */
67 int r_pages_from_pool;
68 int r_own_pages; /* if true, i own page list */
69};
70
71struct ceph_osd_client {
72 struct ceph_client *client;
73
74 struct ceph_osdmap *osdmap; /* current map */
75 struct rw_semaphore map_sem;
76 struct completion map_waiters;
77 u64 last_requested_map;
78
79 struct mutex request_mutex;
80 struct rb_root osds; /* osds */
81 u64 timeout_tid; /* tid of timeout triggering rq */
82 u64 last_tid; /* tid of last request */
83 struct rb_root requests; /* pending requests */
84 int num_requests;
85 struct delayed_work timeout_work;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame^]86#ifdef CONFIG_DEBUG_FS
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]87 struct dentry *debugfs_file;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame^]88#endif
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]89
90 mempool_t *req_mempool;
91
92 struct ceph_msgpool msgpool_op;
93 struct ceph_msgpool msgpool_op_reply;
94};
95
96extern int ceph_osdc_init(struct ceph_osd_client *osdc,
97 struct ceph_client *client);
98extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
99
100extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
101 struct ceph_msg *msg);
102extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
103 struct ceph_msg *msg);
104
105extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
106 struct ceph_file_layout *layout,
107 struct ceph_vino vino,
108 u64 offset, u64 *len, int op, int flags,
109 struct ceph_snap_context *snapc,
110 int do_sync, u32 truncate_seq,
111 u64 truncate_size,
112 struct timespec *mtime,
113 bool use_mempool, int num_reply);
114
115static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
116{
117 atomic_inc(&req->r_ref);
118}
119extern void ceph_osdc_put_request(struct ceph_osd_request *req);
120
121extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
122 struct ceph_osd_request *req,
123 bool nofail);
124extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
125 struct ceph_osd_request *req);
126extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
127
128extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
129 struct ceph_vino vino,
130 struct ceph_file_layout *layout,
131 u64 off, u64 *plen,
132 u32 truncate_seq, u64 truncate_size,
133 struct page **pages, int nr_pages);
134
135extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
136 struct ceph_vino vino,
137 struct ceph_file_layout *layout,
138 struct ceph_snap_context *sc,
139 u64 off, u64 len,
140 u32 truncate_seq, u64 truncate_size,
141 struct timespec *mtime,
142 struct page **pages, int nr_pages,
143 int flags, int do_sync, bool nofail);
144
145#endif
146