1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/kp30.h>
27 #include <linux/obd_support.h>
28 #include <linux/obd_class.h>
29 #include <portals/p30.h>
30 #include <linux/lustre_idl.h>
32 /* FOO_REQUEST_PORTAL is for incoming requests on the FOO
33 * FOO_REPLY_PORTAL is for incoming replies on the FOO
34 * FOO_BULK_PORTAL is for incoming bulk on the FOO
37 #define CONNMGR_REQUEST_PORTAL 1
38 #define CONNMGR_REPLY_PORTAL 2
39 #define OSC_REQUEST_PORTAL 3
40 #define OSC_REPLY_PORTAL 4
41 #define OSC_BULK_PORTAL 5
42 #define OST_REQUEST_PORTAL 6
43 #define OST_REPLY_PORTAL 7
44 #define OST_BULK_PORTAL 8
45 #define MDC_REQUEST_PORTAL 9
46 #define MDC_REPLY_PORTAL 10
47 #define MDC_BULK_PORTAL 11
48 #define MDS_REQUEST_PORTAL 12
49 #define MDS_REPLY_PORTAL 13
50 #define MDS_BULK_PORTAL 14
51 #define LDLM_REQUEST_PORTAL 15
52 #define LDLM_REPLY_PORTAL 16
53 #define LDLM_CLI_REQUEST_PORTAL 17
54 #define LDLM_CLI_REPLY_PORTAL 18
56 /* default rpc ring length */
57 #define RPC_RING_LENGTH 2
63 #define SVC_STOPPING 16
64 #define SVC_STOPPED 32
66 #define RECOVD_STOPPING 1 /* how cleanup tells recovd to quit */
67 #define RECOVD_IDLE 2 /* normal state */
68 #define RECOVD_STOPPED 4 /* after recovd has stopped */
69 #define RECOVD_FAIL 8 /* RPC timeout: wakeup recovd, sets flag */
70 #define RECOVD_TIMEOUT 16 /* set when recovd detects a timeout */
71 #define RECOVD_UPCALL_WAIT 32 /* an upcall has been placed */
72 #define RECOVD_UPCALL_ANSWER 64 /* an upcall has been answered */
74 #define LUSTRE_CONN_NEW 1
75 #define LUSTRE_CONN_CON 2
76 #define LUSTRE_CONN_RECOVD 3
77 #define LUSTRE_CONN_FULL 4
79 struct ptlrpc_connection {
80 struct list_head c_link;
81 struct lustre_peer c_peer;
82 __u8 c_local_uuid[37]; /* XXX do we need this? */
83 __u8 c_remote_uuid[37];
86 __u32 c_generation; /* changes upon new connection */
87 __u32 c_epoch; /* changes when peer changes */
88 __u32 c_bootcount; /* peer's boot count */
100 struct ptlrpc_client {
101 struct obd_device *cli_obd;
102 __u32 cli_request_portal;
103 __u32 cli_reply_portal;
105 __u64 cli_last_committed;
108 struct semaphore cli_rpc_sem; /* limits outstanding requests */
110 spinlock_t cli_lock; /* protects lists */
111 struct list_head cli_delayed_head; /* delayed until after recovery */
112 struct list_head cli_sending_head;
113 struct list_head cli_dying_head;
114 struct list_head cli_ha_item;
115 int (*cli_recover)(struct ptlrpc_client *);
117 struct recovd_obd *cli_recovd;
122 #define PTL_RPC_TYPE_REQUEST 2
123 #define PTL_RPC_TYPE_REPLY 3
125 /* state flags of requests */
126 #define PTL_RPC_FL_INTR (1 << 0)
127 #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */
128 #define PTL_RPC_FL_SENT (1 << 2)
129 #define PTL_BULK_FL_SENT (1 << 3)
130 #define PTL_BULK_FL_RCVD (1 << 4)
131 #define PTL_RPC_FL_ERR (1 << 5)
132 #define PTL_RPC_FL_TIMEOUT (1 << 6)
133 #define PTL_RPC_FL_RESEND (1 << 7)
134 #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */
135 #define PTL_RPC_FL_FINISHED (1 << 9)
136 #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */
137 #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */
138 #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */
140 struct ptlrpc_request {
141 int rq_type; /* one of PTL_RPC_REQUEST, PTL_RPC_REPLY, PTL_RPC_BULK */
142 struct list_head rq_list;
143 struct obd_device *rq_obd;
147 atomic_t rq_refcount;
150 struct lustre_msg *rq_reqmsg;
153 struct lustre_msg *rq_repmsg;
163 // void * rq_reply_handle;
164 wait_queue_head_t rq_wait_for_rep;
167 ptl_md_t rq_reply_md;
168 ptl_handle_md_t rq_reply_md_h;
169 ptl_handle_me_t rq_reply_me_h;
171 /* outgoing req/rep */
173 ptl_handle_md_t rq_req_md_h;
175 struct ptlrpc_connection *rq_connection;
176 struct ptlrpc_client *rq_client;
179 struct ptlrpc_bulk_page {
180 struct ptlrpc_bulk_desc *b_desc;
181 struct list_head b_link;
186 int (*b_cb)(struct ptlrpc_bulk_page *);
189 ptl_handle_md_t b_md_h;
190 ptl_handle_me_t b_me_h;
193 struct ptlrpc_bulk_desc {
195 struct ptlrpc_connection *b_connection;
197 int (*b_cb)(struct ptlrpc_bulk_desc *);
198 struct obd_conn b_conn;
200 wait_queue_head_t b_waitq;
201 struct list_head b_page_list;
203 __u32 b_finished_count;
204 void *b_journal_info;
207 struct ptlrpc_thread {
208 struct list_head t_link;
211 wait_queue_head_t t_ctl_waitq;
214 struct ptlrpc_service {
218 /* incoming request buffers */
219 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
220 char *srv_buf[RPC_RING_LENGTH];
221 __u32 srv_ref_count[RPC_RING_LENGTH];
222 ptl_handle_me_t srv_me_h[RPC_RING_LENGTH];
224 __u32 srv_ring_length;
225 __u32 srv_req_portal;
226 __u32 srv_rep_portal;
231 ptl_handle_eq_t srv_eq_h;
233 struct lustre_peer srv_self;
235 wait_queue_head_t srv_waitq; /* all threads sleep on this */
238 struct list_head srv_reqs;
239 struct list_head srv_threads;
240 int (*srv_handler)(struct obd_device *obddev,
241 struct ptlrpc_service *svc,
242 struct ptlrpc_request *req);
245 typedef int (*svc_handler_t)(struct obd_device *obddev,
246 struct ptlrpc_service *svc,
247 struct ptlrpc_request *req);
249 /* rpc/connection.c */
250 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid);
251 struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer);
252 int ptlrpc_put_connection(struct ptlrpc_connection *c);
253 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
254 void ptlrpc_init_connection(void);
255 void ptlrpc_cleanup_connection(void);
258 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
259 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
260 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
261 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req);
262 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req);
263 void ptlrpc_resend_req(struct ptlrpc_request *request);
264 int ptl_send_rpc(struct ptlrpc_request *request);
265 void ptlrpc_link_svc_me(struct ptlrpc_service *service, int i);
268 void ptlrpc_init_client(struct recovd_obd *,
269 int (*recover)(struct ptlrpc_client *),
270 int req_portal, int rep_portal,
271 struct ptlrpc_client *);
272 void ptlrpc_cleanup_client(struct ptlrpc_client *cli);
273 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req);
274 struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid);
276 int ptlrpc_queue_wait(struct ptlrpc_request *req);
277 void ptlrpc_continue_req(struct ptlrpc_request *req);
278 int ptlrpc_replay_req(struct ptlrpc_request *req);
279 void ptlrpc_restart_req(struct ptlrpc_request *req);
281 struct ptlrpc_request *ptlrpc_prep_req(struct ptlrpc_client *cl,
282 struct ptlrpc_connection *u, int opcode,
283 int count, int *lengths, char **bufs);
284 void ptlrpc_free_req(struct ptlrpc_request *request);
285 void ptlrpc_req_finished(struct ptlrpc_request *request);
286 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
287 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
288 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
289 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
290 int ptlrpc_check_status(struct ptlrpc_request *req, int err);
293 struct ptlrpc_service *
294 ptlrpc_init_svc(__u32 bufsize, int req_portal, int rep_portal, char *uuid,
296 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
297 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
299 int rpc_unregister_service(struct ptlrpc_service *service);
301 struct ptlrpc_svc_data {
303 struct ptlrpc_service *svc;
304 struct ptlrpc_thread *thread;
305 struct obd_device *dev;
308 /* rpc/pack_generic.c */
309 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
310 struct lustre_msg **msg);
311 int lustre_msg_size(int count, int *lengths);
312 int lustre_unpack_msg(struct lustre_msg *m, int len);
313 void *lustre_msg_buf(struct lustre_msg *m, int n);