aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ceph/messenger.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ceph/messenger.h')
-rw-r--r--fs/ceph/messenger.h253
1 files changed, 0 insertions, 253 deletions
diff --git a/fs/ceph/messenger.h b/fs/ceph/messenger.h
deleted file mode 100644
index 76fbc957bc13..000000000000
--- a/fs/ceph/messenger.h
+++ /dev/null
@@ -1,253 +0,0 @@
1#ifndef __FS_CEPH_MESSENGER_H
2#define __FS_CEPH_MESSENGER_H
3
4#include <linux/kref.h>
5#include <linux/mutex.h>
6#include <linux/net.h>
7#include <linux/radix-tree.h>
8#include <linux/uio.h>
9#include <linux/version.h>
10#include <linux/workqueue.h>
11
12#include "types.h"
13#include "buffer.h"
14
15struct ceph_msg;
16struct ceph_connection;
17
18extern struct workqueue_struct *ceph_msgr_wq; /* receive work queue */
19
20/*
21 * Ceph defines these callbacks for handling connection events.
22 */
23struct ceph_connection_operations {
24 struct ceph_connection *(*get)(struct ceph_connection *);
25 void (*put)(struct ceph_connection *);
26
27 /* handle an incoming message. */
28 void (*dispatch) (struct ceph_connection *con, struct ceph_msg *m);
29
30 /* authorize an outgoing connection */
31 int (*get_authorizer) (struct ceph_connection *con,
32 void **buf, int *len, int *proto,
33 void **reply_buf, int *reply_len, int force_new);
34 int (*verify_authorizer_reply) (struct ceph_connection *con, int len);
35 int (*invalidate_authorizer)(struct ceph_connection *con);
36
37 /* protocol version mismatch */
38 void (*bad_proto) (struct ceph_connection *con);
39
40 /* there was some error on the socket (disconnect, whatever) */
41 void (*fault) (struct ceph_connection *con);
42
43 /* a remote host as terminated a message exchange session, and messages
44 * we sent (or they tried to send us) may be lost. */
45 void (*peer_reset) (struct ceph_connection *con);
46
47 struct ceph_msg * (*alloc_msg) (struct ceph_connection *con,
48 struct ceph_msg_header *hdr,
49 int *skip);
50};
51
52/* use format string %s%d */
53#define ENTITY_NAME(n) ceph_entity_type_name((n).type), le64_to_cpu((n).num)
54
55struct ceph_messenger {
56 struct ceph_entity_inst inst; /* my name+address */
57 struct ceph_entity_addr my_enc_addr;
58 struct page *zero_page; /* used in certain error cases */
59
60 bool nocrc;
61
62 /*
63 * the global_seq counts connections i (attempt to) initiate
64 * in order to disambiguate certain connect race conditions.
65 */
66 u32 global_seq;
67 spinlock_t global_seq_lock;
68};
69
70/*
71 * a single message. it contains a header (src, dest, message type, etc.),
72 * footer (crc values, mainly), a "front" message body, and possibly a
73 * data payload (stored in some number of pages).
74 */
75struct ceph_msg {
76 struct ceph_msg_header hdr; /* header */
77 struct ceph_msg_footer footer; /* footer */
78 struct kvec front; /* unaligned blobs of message */
79 struct ceph_buffer *middle;
80 struct page **pages; /* data payload. NOT OWNER. */
81 unsigned nr_pages; /* size of page array */
82 struct ceph_pagelist *pagelist; /* instead of pages */
83 struct list_head list_head;
84 struct kref kref;
85 bool front_is_vmalloc;
86 bool more_to_follow;
87 bool needs_out_seq;
88 int front_max;
89
90 struct ceph_msgpool *pool;
91};
92
93struct ceph_msg_pos {
94 int page, page_pos; /* which page; offset in page */
95 int data_pos; /* offset in data payload */
96 int did_page_crc; /* true if we've calculated crc for current page */
97};
98
99/* ceph connection fault delay defaults, for exponential backoff */
100#define BASE_DELAY_INTERVAL (HZ/2)
101#define MAX_DELAY_INTERVAL (5 * 60 * HZ)
102
103/*
104 * ceph_connection state bit flags
105 *
106 * QUEUED and BUSY are used together to ensure that only a single
107 * thread is currently opening, reading or writing data to the socket.
108 */
109#define LOSSYTX 0 /* we can close channel or drop messages on errors */
110#define CONNECTING 1
111#define NEGOTIATING 2
112#define KEEPALIVE_PENDING 3
113#define WRITE_PENDING 4 /* we have data ready to send */
114#define QUEUED 5 /* there is work queued on this connection */
115#define BUSY 6 /* work is being done */
116#define STANDBY 8 /* no outgoing messages, socket closed. we keep
117 * the ceph_connection around to maintain shared
118 * state with the peer. */
119#define CLOSED 10 /* we've closed the connection */
120#define SOCK_CLOSED 11 /* socket state changed to closed */
121#define OPENING 13 /* open connection w/ (possibly new) peer */
122#define DEAD 14 /* dead, about to kfree */
123
124/*
125 * A single connection with another host.
126 *
127 * We maintain a queue of outgoing messages, and some session state to
128 * ensure that we can preserve the lossless, ordered delivery of
129 * messages in the case of a TCP disconnect.
130 */
131struct ceph_connection {
132 void *private;
133 atomic_t nref;
134
135 const struct ceph_connection_operations *ops;
136
137 struct ceph_messenger *msgr;
138 struct socket *sock;
139 unsigned long state; /* connection state (see flags above) */
140 const char *error_msg; /* error message, if any */
141
142 struct ceph_entity_addr peer_addr; /* peer address */
143 struct ceph_entity_name peer_name; /* peer name */
144 struct ceph_entity_addr peer_addr_for_me;
145 unsigned peer_features;
146 u32 connect_seq; /* identify the most recent connection
147 attempt for this connection, client */
148 u32 peer_global_seq; /* peer's global seq for this connection */
149
150 int auth_retry; /* true if we need a newer authorizer */
151 void *auth_reply_buf; /* where to put the authorizer reply */
152 int auth_reply_buf_len;
153
154 struct mutex mutex;
155
156 /* out queue */
157 struct list_head out_queue;
158 struct list_head out_sent; /* sending or sent but unacked */
159 u64 out_seq; /* last message queued for send */
160 bool out_keepalive_pending;
161
162 u64 in_seq, in_seq_acked; /* last message received, acked */
163
164 /* connection negotiation temps */
165 char in_banner[CEPH_BANNER_MAX_LEN];
166 union {
167 struct { /* outgoing connection */
168 struct ceph_msg_connect out_connect;
169 struct ceph_msg_connect_reply in_reply;
170 };
171 struct { /* incoming */
172 struct ceph_msg_connect in_connect;
173 struct ceph_msg_connect_reply out_reply;
174 };
175 };
176 struct ceph_entity_addr actual_peer_addr;
177
178 /* message out temps */
179 struct ceph_msg *out_msg; /* sending message (== tail of
180 out_sent) */
181 bool out_msg_done;
182 struct ceph_msg_pos out_msg_pos;
183
184 struct kvec out_kvec[8], /* sending header/footer data */
185 *out_kvec_cur;
186 int out_kvec_left; /* kvec's left in out_kvec */
187 int out_skip; /* skip this many bytes */
188 int out_kvec_bytes; /* total bytes left */
189 bool out_kvec_is_msg; /* kvec refers to out_msg */
190 int out_more; /* there is more data after the kvecs */
191 __le64 out_temp_ack; /* for writing an ack */
192
193 /* message in temps */
194 struct ceph_msg_header in_hdr;
195 struct ceph_msg *in_msg;
196 struct ceph_msg_pos in_msg_pos;
197 u32 in_front_crc, in_middle_crc, in_data_crc; /* calculated crc */
198
199 char in_tag; /* protocol control byte */
200 int in_base_pos; /* bytes read */
201 __le64 in_temp_ack; /* for reading an ack */
202
203 struct delayed_work work; /* send|recv work */
204 unsigned long delay; /* current delay interval */
205};
206
207
208extern const char *pr_addr(const struct sockaddr_storage *ss);
209extern int ceph_parse_ips(const char *c, const char *end,
210 struct ceph_entity_addr *addr,
211 int max_count, int *count);
212
213
214extern int ceph_msgr_init(void);
215extern void ceph_msgr_exit(void);
216extern void ceph_msgr_flush(void);
217
218extern struct ceph_messenger *ceph_messenger_create(
219 struct ceph_entity_addr *myaddr);
220extern void ceph_messenger_destroy(struct ceph_messenger *);
221
222extern void ceph_con_init(struct ceph_messenger *msgr,
223 struct ceph_connection *con);
224extern void ceph_con_open(struct ceph_connection *con,
225 struct ceph_entity_addr *addr);
226extern bool ceph_con_opened(struct ceph_connection *con);
227extern void ceph_con_close(struct ceph_connection *con);
228extern void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg);
229extern void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg);
230extern void ceph_con_revoke_message(struct ceph_connection *con,
231 struct ceph_msg *msg);
232extern void ceph_con_keepalive(struct ceph_connection *con);
233extern struct ceph_connection *ceph_con_get(struct ceph_connection *con);
234extern void ceph_con_put(struct ceph_connection *con);
235
236extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags);
237extern void ceph_msg_kfree(struct ceph_msg *m);
238
239
240static inline struct ceph_msg *ceph_msg_get(struct ceph_msg *msg)
241{
242 kref_get(&msg->kref);
243 return msg;
244}
245extern void ceph_msg_last_put(struct kref *kref);
246static inline void ceph_msg_put(struct ceph_msg *msg)
247{
248 kref_put(&msg->kref, ceph_msg_last_put);
249}
250
251extern void ceph_msg_dump(struct ceph_msg *msg);
252
253#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 04:57:56 -0500