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gerrit-public.fairphone.software / kernel / msm-4.9 / 7740a42f816790583bd8a9079337772d511af3a3 / . / fs / ceph / osd_client.h
blob: 4162c6810a8f7c8debb5f6f26ed9a7d31675a7cb [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>
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame]5#include <linux/kref.h>
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]6#include <linux/mempool.h>
7#include <linux/rbtree.h>
8
9#include "types.h"
10#include "osdmap.h"
11#include "messenger.h"
12
13struct ceph_msg;
14struct ceph_snap_context;
15struct ceph_osd_request;
16struct ceph_osd_client;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800[diff] [blame]17struct ceph_authorizer;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]18
19/*
20 * completion callback for async writepages
21 */
22typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *,
23 struct ceph_msg *);
24
25/* a given osd we're communicating with */
26struct ceph_osd {
27 atomic_t o_ref;
28 struct ceph_osd_client *o_osdc;
29 int o_osd;
30 int o_incarnation;
31 struct rb_node o_node;
32 struct ceph_connection o_con;
33 struct list_head o_requests;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800[diff] [blame]34 struct ceph_authorizer *o_authorizer;
35 void *o_authorizer_buf, *o_authorizer_reply_buf;
36 size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]37};
38
39/* an in-flight request */
40struct ceph_osd_request {
41 u64 r_tid; /* unique for this client */
42 struct rb_node r_node;
43 struct list_head r_osd_item;
44 struct ceph_osd *r_osd;
Sage Weil7740a422010-01-08 15:58:25 -0800[diff] [blame^]45 struct ceph_pg r_pgid;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]46
Sage Weil350b1c32009-12-22 10:45:45 -0800[diff] [blame]47 struct ceph_connection *r_con_filling_pages;
48
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]49 struct ceph_msg *r_request, *r_reply;
50 int r_result;
51 int r_flags; /* any additional flags for the osd */
52 u32 r_sent; /* >0 if r_request is sending/sent */
Sage Weil350b1c32009-12-22 10:45:45 -0800[diff] [blame]53 int r_got_reply;
Yehuda Sadeh93c20d92009-12-15 09:50:36 -0800[diff] [blame]54 int r_num_prealloc_reply;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]55
56 struct ceph_osd_client *r_osdc;
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame]57 struct kref r_kref;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]58 bool r_mempool;
59 struct completion r_completion, r_safe_completion;
60 ceph_osdc_callback_t r_callback, r_safe_callback;
61 struct ceph_eversion r_reassert_version;
62 struct list_head r_unsafe_item;
63
64 struct inode *r_inode; /* for use by callbacks */
65 struct writeback_control *r_wbc; /* ditto */
66
67 char r_oid[40]; /* object name */
68 int r_oid_len;
69 unsigned long r_timeout_stamp;
70 bool r_resend; /* msg send failed, needs retry */
71
72 struct ceph_file_layout r_file_layout;
73 struct ceph_snap_context *r_snapc; /* snap context for writes */
74 unsigned r_num_pages; /* size of page array (follows) */
75 struct page **r_pages; /* pages for data payload */
76 int r_pages_from_pool;
77 int r_own_pages; /* if true, i own page list */
78};
79
80struct ceph_osd_client {
81 struct ceph_client *client;
82
83 struct ceph_osdmap *osdmap; /* current map */
84 struct rw_semaphore map_sem;
85 struct completion map_waiters;
86 u64 last_requested_map;
87
88 struct mutex request_mutex;
89 struct rb_root osds; /* osds */
90 u64 timeout_tid; /* tid of timeout triggering rq */
91 u64 last_tid; /* tid of last request */
92 struct rb_root requests; /* pending requests */
93 int num_requests;
94 struct delayed_work timeout_work;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame]95#ifdef CONFIG_DEBUG_FS
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]96 struct dentry *debugfs_file;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame]97#endif
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]98
99 mempool_t *req_mempool;
100
101 struct ceph_msgpool msgpool_op;
102 struct ceph_msgpool msgpool_op_reply;
103};
104
105extern int ceph_osdc_init(struct ceph_osd_client *osdc,
106 struct ceph_client *client);
107extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
108
109extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
110 struct ceph_msg *msg);
111extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
112 struct ceph_msg *msg);
113
114extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
115 struct ceph_file_layout *layout,
116 struct ceph_vino vino,
117 u64 offset, u64 *len, int op, int flags,
118 struct ceph_snap_context *snapc,
119 int do_sync, u32 truncate_seq,
120 u64 truncate_size,
121 struct timespec *mtime,
122 bool use_mempool, int num_reply);
123
124static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
125{
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame]126 kref_get(&req->r_kref);
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]127}
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame]128extern void ceph_osdc_release_request(struct kref *kref);
129static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
130{
131 kref_put(&req->r_kref, ceph_osdc_release_request);
132}
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]133
134extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
135 struct ceph_osd_request *req,
136 bool nofail);
137extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
138 struct ceph_osd_request *req);
139extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
140
141extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
142 struct ceph_vino vino,
143 struct ceph_file_layout *layout,
144 u64 off, u64 *plen,
145 u32 truncate_seq, u64 truncate_size,
146 struct page **pages, int nr_pages);
147
148extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
149 struct ceph_vino vino,
150 struct ceph_file_layout *layout,
151 struct ceph_snap_context *sc,
152 u64 off, u64 len,
153 u32 truncate_seq, u64 truncate_size,
154 struct timespec *mtime,
155 struct page **pages, int nr_pages,
156 int flags, int do_sync, bool nofail);
157
158#endif
159