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review.evervolv.com / android_kernel_htc_msm8960 / 415e49a9c4faf1a1480b1497da2037608e5aa2c5 / . / fs / ceph / osd_client.h
blob: 20ee61847416e830288759d3e22098726eaab881 [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;
45
46 struct ceph_msg *r_request, *r_reply;
47 int r_result;
48 int r_flags; /* any additional flags for the osd */
49 u32 r_sent; /* >0 if r_request is sending/sent */
50 int r_prepared_pages, r_got_reply;
51
52 struct ceph_osd_client *r_osdc;
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame^]53 struct kref r_kref;
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]54 bool r_mempool;
55 struct completion r_completion, r_safe_completion;
56 ceph_osdc_callback_t r_callback, r_safe_callback;
57 struct ceph_eversion r_reassert_version;
58 struct list_head r_unsafe_item;
59
60 struct inode *r_inode; /* for use by callbacks */
61 struct writeback_control *r_wbc; /* ditto */
62
63 char r_oid[40]; /* object name */
64 int r_oid_len;
65 unsigned long r_timeout_stamp;
66 bool r_resend; /* msg send failed, needs retry */
67
68 struct ceph_file_layout r_file_layout;
69 struct ceph_snap_context *r_snapc; /* snap context for writes */
70 unsigned r_num_pages; /* size of page array (follows) */
71 struct page **r_pages; /* pages for data payload */
72 int r_pages_from_pool;
73 int r_own_pages; /* if true, i own page list */
74};
75
76struct ceph_osd_client {
77 struct ceph_client *client;
78
79 struct ceph_osdmap *osdmap; /* current map */
80 struct rw_semaphore map_sem;
81 struct completion map_waiters;
82 u64 last_requested_map;
83
84 struct mutex request_mutex;
85 struct rb_root osds; /* osds */
86 u64 timeout_tid; /* tid of timeout triggering rq */
87 u64 last_tid; /* tid of last request */
88 struct rb_root requests; /* pending requests */
89 int num_requests;
90 struct delayed_work timeout_work;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame]91#ifdef CONFIG_DEBUG_FS
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]92 struct dentry *debugfs_file;
Sage Weil039934b2009-11-12 15:05:52 -0800[diff] [blame]93#endif
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]94
95 mempool_t *req_mempool;
96
97 struct ceph_msgpool msgpool_op;
98 struct ceph_msgpool msgpool_op_reply;
99};
100
101extern int ceph_osdc_init(struct ceph_osd_client *osdc,
102 struct ceph_client *client);
103extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
104
105extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
106 struct ceph_msg *msg);
107extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
108 struct ceph_msg *msg);
109
110extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
111 struct ceph_file_layout *layout,
112 struct ceph_vino vino,
113 u64 offset, u64 *len, int op, int flags,
114 struct ceph_snap_context *snapc,
115 int do_sync, u32 truncate_seq,
116 u64 truncate_size,
117 struct timespec *mtime,
118 bool use_mempool, int num_reply);
119
120static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
121{
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame^]122 kref_get(&req->r_kref);
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]123}
Sage Weil415e49a2009-12-07 13:37:03 -0800[diff] [blame^]124extern void ceph_osdc_release_request(struct kref *kref);
125static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
126{
127 kref_put(&req->r_kref, ceph_osdc_release_request);
128}
Sage Weilf24e9982009-10-06 11:31:10 -0700[diff] [blame]129
130extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
131 struct ceph_osd_request *req,
132 bool nofail);
133extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
134 struct ceph_osd_request *req);
135extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
136
137extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
138 struct ceph_vino vino,
139 struct ceph_file_layout *layout,
140 u64 off, u64 *plen,
141 u32 truncate_seq, u64 truncate_size,
142 struct page **pages, int nr_pages);
143
144extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
145 struct ceph_vino vino,
146 struct ceph_file_layout *layout,
147 struct ceph_snap_context *sc,
148 u64 off, u64 len,
149 u32 truncate_seq, u64 truncate_size,
150 struct timespec *mtime,
151 struct page **pages, int nr_pages,
152 int flags, int do_sync, bool nofail);
153
154#endif
155