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ceph: fix connection fault con_work reentrancy problem
[linux-2.6-block.git] / fs / ceph / osd_client.h
CommitLineData
f24e9980
SW		 1#ifndef _FS_CEPH_OSD_CLIENT_H
2#define _FS_CEPH_OSD_CLIENT_H
3
4#include <linux/completion.h>
415e49a9 5#include <linux/kref.h>
f24e9980
SW		 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;
4e7a5dcd 17struct ceph_authorizer;
f24e9980
SW		 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;
f5a2041b 34 struct list_head o_osd_lru;
4e7a5dcd
SW		 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;
f5a2041b 38 unsigned long lru_ttl;
422d2cb8
YS		 39 int o_marked_for_keepalive;
40 struct list_head o_keepalive_item;
f24e9980
SW		 41};
42
43/* an in-flight request */
44struct ceph_osd_request {
45 u64 r_tid; /* unique for this client */
46 struct rb_node r_node;
422d2cb8 47 struct list_head r_req_lru_item;
f24e9980
SW		 48 struct list_head r_osd_item;
49 struct ceph_osd *r_osd;
7740a42f 50 struct ceph_pg r_pgid;
f24e9980 51
0d59ab81 52 struct ceph_connection *r_con_filling_msg;
350b1c32 53
f24e9980
SW		 54 struct ceph_msg *r_request, *r_reply;
55 int r_result;
56 int r_flags; /* any additional flags for the osd */
57 u32 r_sent; /* >0 if r_request is sending/sent */
350b1c32 58 int r_got_reply;
f24e9980
SW		 59
60 struct ceph_osd_client *r_osdc;
415e49a9 61 struct kref r_kref;
f24e9980
SW		 62 bool r_mempool;
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;
67
68 struct inode *r_inode; /* for use by callbacks */
69 struct writeback_control *r_wbc; /* ditto */
70
71 char r_oid[40]; /* object name */
72 int r_oid_len;
422d2cb8 73 unsigned long r_sent_stamp;
f24e9980
SW		 74 bool r_resend; /* msg send failed, needs retry */
75
76 struct ceph_file_layout r_file_layout;
77 struct ceph_snap_context *r_snapc; /* snap context for writes */
78 unsigned r_num_pages; /* size of page array (follows) */
79 struct page **r_pages; /* pages for data payload */
80 int r_pages_from_pool;
81 int r_own_pages; /* if true, i own page list */
82};
83
84struct ceph_osd_client {
85 struct ceph_client *client;
86
87 struct ceph_osdmap *osdmap; /* current map */
88 struct rw_semaphore map_sem;
89 struct completion map_waiters;
90 u64 last_requested_map;
91
92 struct mutex request_mutex;
93 struct rb_root osds; /* osds */
f5a2041b 94 struct list_head osd_lru; /* idle osds */
f24e9980
SW		 95 u64 timeout_tid; /* tid of timeout triggering rq */
96 u64 last_tid; /* tid of last request */
97 struct rb_root requests; /* pending requests */
422d2cb8 98 struct list_head req_lru; /* pending requests lru */
f24e9980
SW		 99 int num_requests;
100 struct delayed_work timeout_work;
f5a2041b 101 struct delayed_work osds_timeout_work;
039934b8 102#ifdef CONFIG_DEBUG_FS
f24e9980 103 struct dentry *debugfs_file;
039934b8 104#endif
f24e9980
SW		 105
106 mempool_t *req_mempool;
107
0d59ab81 108 struct ceph_msgpool msgpool_op;
c16e7869 109 struct ceph_msgpool msgpool_op_reply;
f24e9980
SW		 110};
111
112extern int ceph_osdc_init(struct ceph_osd_client *osdc,
113 struct ceph_client *client);
114extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
115
116extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
117 struct ceph_msg *msg);
118extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
119 struct ceph_msg *msg);
120
121extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
122 struct ceph_file_layout *layout,
123 struct ceph_vino vino,
124 u64 offset, u64 *len, int op, int flags,
125 struct ceph_snap_context *snapc,
126 int do_sync, u32 truncate_seq,
127 u64 truncate_size,
128 struct timespec *mtime,
129 bool use_mempool, int num_reply);
130
131static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
132{
415e49a9
SW		 133 kref_get(&req->r_kref);
134}
135extern void ceph_osdc_release_request(struct kref *kref);
136static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
137{
138 kref_put(&req->r_kref, ceph_osdc_release_request);
f24e9980 139}
f24e9980
SW		 140
141extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
142 struct ceph_osd_request *req,
143 bool nofail);
144extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
145 struct ceph_osd_request *req);
146extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
147
148extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
149 struct ceph_vino vino,
150 struct ceph_file_layout *layout,
151 u64 off, u64 *plen,
152 u32 truncate_seq, u64 truncate_size,
153 struct page **pages, int nr_pages);
154
155extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
156 struct ceph_vino vino,
157 struct ceph_file_layout *layout,
158 struct ceph_snap_context *sc,
159 u64 off, u64 len,
160 u32 truncate_seq, u64 truncate_size,
161 struct timespec *mtime,
162 struct page **pages, int nr_pages,
163 int flags, int do_sync, bool nofail);
164
165#endif
166
Linux 6.x block layer and io_uring tree(s)