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/tqueue.h>
27 #include <linux/kp30.h>
28 #include <linux/obd.h>
29 #include <portals/p30.h>
30 #include <linux/lustre_idl.h>
32 /* default rpc ring length */
33 #define RPC_RING_LENGTH 10
35 struct ptlrpc_connection {
36 struct list_head c_link;
37 struct lustre_peer c_peer;
38 __u8 c_local_uuid[37]; /* XXX do we need this? */
39 __u8 c_remote_uuid[37];
42 __u32 c_generation; /* changes upon new connection */
43 __u32 c_epoch; /* changes when peer changes */
44 __u32 c_bootcount; /* peer's boot count */
56 struct ptlrpc_client {
57 struct obd_device *cli_obd;
58 __u32 cli_request_portal;
59 __u32 cli_reply_portal;
62 __u64 cli_last_committed;
63 __u32 cli_target_devno;
66 struct semaphore cli_rpc_sem; /* limits outstanding requests */
68 spinlock_t cli_lock; /* protects lists */
69 struct list_head cli_delayed_head; /* delayed until after recovery */
70 struct list_head cli_sending_head;
71 struct list_head cli_dying_head;
72 struct list_head cli_ha_item;
73 int (*cli_recover)(struct ptlrpc_client *);
75 struct recovd_obd *cli_recovd;
79 /* state flags of requests */
80 #define PTL_RPC_FL_INTR (1 << 0)
81 #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */
82 #define PTL_RPC_FL_SENT (1 << 2)
83 #define PTL_BULK_FL_SENT (1 << 3)
84 #define PTL_BULK_FL_RCVD (1 << 4)
85 #define PTL_RPC_FL_ERR (1 << 5)
86 #define PTL_RPC_FL_TIMEOUT (1 << 6)
87 #define PTL_RPC_FL_RESEND (1 << 7)
88 #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */
89 #define PTL_RPC_FL_FINISHED (1 << 9)
90 #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */
91 #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */
92 #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */
94 struct ptlrpc_request {
95 int rq_type; /* one of PTL_RPC_REQUEST, PTL_RPC_REPLY, PTL_RPC_BULK */
96 struct list_head rq_list;
97 struct list_head rq_multi;
98 struct obd_device *rq_obd;
102 atomic_t rq_refcount;
105 struct lustre_msg *rq_reqmsg;
108 struct lustre_msg *rq_repmsg;
118 // void * rq_reply_handle;
119 wait_queue_head_t rq_wait_for_rep;
122 ptl_md_t rq_reply_md;
123 ptl_handle_md_t rq_reply_md_h;
124 ptl_handle_me_t rq_reply_me_h;
126 /* outgoing req/rep */
128 ptl_handle_md_t rq_req_md_h;
130 struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */
131 struct obd_export *rq_export;
132 struct ptlrpc_connection *rq_connection;
133 struct ptlrpc_client *rq_client;
134 struct ptlrpc_service *rq_svc;
137 struct ptlrpc_bulk_page {
138 struct ptlrpc_bulk_desc *b_desc;
139 struct list_head b_link;
145 struct dentry *b_dentry;
146 int (*b_cb)(struct ptlrpc_bulk_page *);
149 struct ptlrpc_bulk_desc {
151 struct ptlrpc_connection *b_connection;
152 struct ptlrpc_client *b_client;
154 struct lustre_handle b_conn;
155 void (*b_cb)(struct ptlrpc_bulk_desc *, void *);
158 wait_queue_head_t b_waitq;
159 struct list_head b_page_list;
162 void *b_desc_private;
163 struct tq_struct b_queue;
166 ptl_handle_md_t b_md_h;
167 ptl_handle_me_t b_me_h;
169 struct iovec b_iov[16]; /* self-sized pre-allocated iov */
172 struct ptlrpc_thread {
173 struct list_head t_link;
176 wait_queue_head_t t_ctl_waitq;
179 struct ptlrpc_service {
183 /* incoming request buffers */
184 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
185 char *srv_buf[RPC_RING_LENGTH];
186 __u32 srv_ref_count[RPC_RING_LENGTH];
187 ptl_handle_me_t srv_me_h[RPC_RING_LENGTH];
189 __u32 srv_ring_length;
190 __u32 srv_req_portal;
191 __u32 srv_rep_portal;
196 ptl_handle_eq_t srv_eq_h;
198 struct lustre_peer srv_self;
200 wait_queue_head_t srv_waitq; /* all threads sleep on this */
203 struct list_head srv_reqs;
204 struct list_head srv_threads;
205 int (*srv_handler)(struct ptlrpc_request *req);
208 static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h)
210 req->rq_reqmsg->addr = h->addr;
211 req->rq_reqmsg->cookie = h->cookie;
213 struct ptlrpc_request *ptlrpc_prep_req2(struct lustre_handle *conn,
214 int opcode, int count, int *lengths,
217 typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *);
219 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
221 /* rpc/connection.c */
222 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid);
223 struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer);
224 int ptlrpc_put_connection(struct ptlrpc_connection *c);
225 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
226 void ptlrpc_init_connection(void);
227 void ptlrpc_cleanup_connection(void);
230 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk);
231 int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk);
232 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
233 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
234 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
235 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req);
236 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req);
237 void ptlrpc_resend_req(struct ptlrpc_request *request);
238 int ptl_send_rpc(struct ptlrpc_request *request);
239 void ptlrpc_link_svc_me(struct ptlrpc_service *service, int i);
242 void ptlrpc_init_client(struct recovd_obd *,
243 int (*recover)(struct ptlrpc_client *),
244 int req_portal, int rep_portal,
245 struct ptlrpc_client *);
246 void ptlrpc_cleanup_client(struct ptlrpc_client *cli);
247 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req);
248 struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid);
250 int ptlrpc_queue_wait(struct ptlrpc_request *req);
251 void ptlrpc_continue_req(struct ptlrpc_request *req);
252 int ptlrpc_replay_req(struct ptlrpc_request *req);
253 void ptlrpc_restart_req(struct ptlrpc_request *req);
255 struct ptlrpc_request *ptlrpc_prep_req(struct ptlrpc_client *cl,
256 struct ptlrpc_connection *u, int opcode,
257 int count, int *lengths, char **bufs);
258 void ptlrpc_free_req(struct ptlrpc_request *request);
259 void ptlrpc_req_finished(struct ptlrpc_request *request);
260 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
261 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
262 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
263 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
264 int ptlrpc_check_status(struct ptlrpc_request *req, int err);
267 struct ptlrpc_service *
268 ptlrpc_init_svc(__u32 bufsize, int req_portal, int rep_portal, char *uuid,
270 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
271 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
273 int ptlrpc_unregister_service(struct ptlrpc_service *service);
275 struct ptlrpc_svc_data {
277 struct ptlrpc_service *svc;
278 struct ptlrpc_thread *thread;
279 struct obd_device *dev;
282 /* rpc/pack_generic.c */
283 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
284 struct lustre_msg **msg);
285 int lustre_msg_size(int count, int *lengths);
286 int lustre_unpack_msg(struct lustre_msg *m, int len);
287 void *lustre_msg_buf(struct lustre_msg *m, int n);
289 static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc)
291 if (atomic_dec_and_test(&desc->b_refcount)) {
292 CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc);
293 ptlrpc_free_bulk(desc);
295 CDEBUG(D_PAGE, "%p -> %d\n", desc,
296 atomic_read(&desc->b_refcount));
300 static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc)
302 atomic_inc(&desc->b_refcount);
303 CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc,
304 atomic_read(&desc->b_refcount));