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>
31 #include <linux/lustre_ha.h>
32 #include <linux/lustre_import.h>
34 /* default rpc ring length */
35 //#define RPC_RING_LENGTH 10
36 #define RPC_REQUEST_QUEUE_DEPTH 1024
38 struct ptlrpc_connection {
39 struct list_head c_link;
40 struct lustre_peer c_peer;
41 __u8 c_local_uuid[37]; /* XXX do we need this? */
42 __u8 c_remote_uuid[37];
45 __u32 c_generation; /* changes upon new connection */
46 __u32 c_epoch; /* changes when peer changes */
47 __u32 c_bootcount; /* peer's boot count */
49 spinlock_t c_lock; /* also protects req->rq_list */
58 __u64 c_last_xid; /* protected by c_lock */
59 __u64 c_last_committed;/* protected by c_lock */
60 struct list_head c_delayed_head;/* delayed until post-recovery */
61 struct list_head c_sending_head;/* protected by c_lock */
62 struct list_head c_dying_head; /* protected by c_lock */
63 struct recovd_data c_recovd_data;
65 struct list_head c_imports;
66 struct list_head c_exports;
69 struct ptlrpc_client {
70 __u32 cli_request_portal;
71 __u32 cli_reply_portal;
73 __u32 cli_target_devno;
76 // struct semaphore cli_rpc_sem; /* limits outstanding requests */
81 /* state flags of requests */
82 #define PTL_RPC_FL_INTR (1 << 0)
83 #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */
84 #define PTL_RPC_FL_SENT (1 << 2)
85 #define PTL_BULK_FL_SENT (1 << 3)
86 #define PTL_BULK_FL_RCVD (1 << 4)
87 #define PTL_RPC_FL_ERR (1 << 5)
88 #define PTL_RPC_FL_TIMEOUT (1 << 6)
89 #define PTL_RPC_FL_RESEND (1 << 7)
90 #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */
91 #define PTL_RPC_FL_FINISHED (1 << 9)
92 #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */
93 #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */
94 #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */
96 struct ptlrpc_request {
97 int rq_type; /* one of PTL_RPC_MSG_* */
98 struct list_head rq_list;
99 struct list_head rq_multi;
100 struct obd_device *rq_obd;
104 atomic_t rq_refcount;
107 struct lustre_msg *rq_reqmsg;
110 struct lustre_msg *rq_repmsg;
120 // void * rq_reply_handle;
121 wait_queue_head_t rq_wait_for_rep;
124 ptl_md_t rq_reply_md;
125 ptl_handle_md_t rq_reply_md_h;
126 ptl_handle_me_t rq_reply_me_h;
128 /* outgoing req/rep */
130 ptl_handle_md_t rq_req_md_h;
132 struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */
133 struct obd_export *rq_export;
134 struct ptlrpc_connection *rq_connection;
135 struct obd_import *rq_import;
136 struct ptlrpc_service *rq_svc;
138 void (*rq_replay_cb)(struct ptlrpc_request *, void *);
139 void *rq_replay_cb_data;
142 struct ptlrpc_bulk_page {
143 struct ptlrpc_bulk_desc *bp_desc;
144 struct list_head bp_link;
147 struct page *bp_page;
150 struct dentry *bp_dentry;
151 int (*bp_cb)(struct ptlrpc_bulk_page *);
154 struct ptlrpc_bulk_desc {
156 struct ptlrpc_connection *bd_connection;
157 struct ptlrpc_client *bd_client;
159 struct lustre_handle bd_conn;
160 void (*bd_cb)(struct ptlrpc_bulk_desc *, void *);
163 wait_queue_head_t bd_waitq;
164 struct list_head bd_page_list;
166 atomic_t bd_refcount;
167 void *bd_desc_private;
168 struct tq_struct bd_queue;
171 ptl_handle_md_t bd_md_h;
172 ptl_handle_me_t bd_me_h;
174 atomic_t bd_source_callback_count;
176 struct iovec bd_iov[16]; /* self-sized pre-allocated iov */
179 struct ptlrpc_thread {
180 struct list_head t_link;
183 wait_queue_head_t t_ctl_waitq;
186 struct ptlrpc_request_buffer_desc {
187 struct ptlrpc_service *rqbd_service;
188 ptl_handle_me_t rqbd_me_h;
192 struct ptlrpc_service {
196 /* incoming request buffers */
197 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
199 struct ptlrpc_request_buffer_desc *srv_rqbds; /* all the request buffer descriptors */
201 __u32 srv_buf_size; /* # bytes in a request buffer */
202 __u32 srv_nbuffs; /* # request buffers */
203 __u32 srv_req_portal;
204 __u32 srv_rep_portal;
209 ptl_handle_eq_t srv_eq_h;
211 struct lustre_peer srv_self;
213 wait_queue_head_t srv_waitq; /* all threads sleep on this */
216 struct list_head srv_reqs;
217 struct list_head srv_threads;
218 int (*srv_handler)(struct ptlrpc_request *req);
219 char *srv_name; /* only statically allocated strings here; we don't clean them */
222 static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h)
224 req->rq_reqmsg->addr = h->addr;
225 req->rq_reqmsg->cookie = h->cookie;
228 typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *);
230 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
232 /* rpc/connection.c */
233 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid);
234 struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer,
236 int ptlrpc_put_connection(struct ptlrpc_connection *c);
237 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
238 void ptlrpc_init_connection(void);
239 void ptlrpc_cleanup_connection(void);
242 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk);
243 int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk);
244 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
245 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
246 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
247 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req);
248 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req);
249 void ptlrpc_resend_req(struct ptlrpc_request *request);
250 int ptl_send_rpc(struct ptlrpc_request *request);
251 void ptlrpc_link_svc_me(struct ptlrpc_request_buffer_desc *rqbd);
254 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
255 struct ptlrpc_client *);
256 void ptlrpc_cleanup_client(struct obd_import *imp);
257 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req);
258 struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid);
260 int ptlrpc_queue_wait(struct ptlrpc_request *req);
261 void ptlrpc_continue_req(struct ptlrpc_request *req);
262 int ptlrpc_replay_req(struct ptlrpc_request *req);
263 void ptlrpc_restart_req(struct ptlrpc_request *req);
265 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
266 int count, int *lengths, char **bufs);
267 void ptlrpc_free_req(struct ptlrpc_request *request);
268 void ptlrpc_req_finished(struct ptlrpc_request *request);
269 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
270 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
271 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
272 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
273 int ptlrpc_check_status(struct ptlrpc_request *req, int err);
276 struct ptlrpc_service *
277 ptlrpc_init_svc(__u32 bufsize, int nbuffs, int req_portal, int rep_portal,
278 char *uuid, svc_handler_t, char *name);
279 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
280 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
282 int ptlrpc_unregister_service(struct ptlrpc_service *service);
284 struct ptlrpc_svc_data {
286 struct ptlrpc_service *svc;
287 struct ptlrpc_thread *thread;
288 struct obd_device *dev;
291 /* rpc/pack_generic.c */
292 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
293 struct lustre_msg **msg);
294 int lustre_msg_size(int count, int *lengths);
295 int lustre_unpack_msg(struct lustre_msg *m, int len);
296 void *lustre_msg_buf(struct lustre_msg *m, int n);
298 static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc)
300 if (atomic_dec_and_test(&desc->bd_refcount)) {
301 CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc);
302 ptlrpc_free_bulk(desc);
304 CDEBUG(D_PAGE, "%p -> %d\n", desc,
305 atomic_read(&desc->bd_refcount));
309 static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc)
311 atomic_inc(&desc->bd_refcount);
312 CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc,
313 atomic_read(&desc->bd_refcount));