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
37 struct ptlrpc_connection {
38 struct list_head c_link;
39 struct lustre_peer c_peer;
40 __u8 c_local_uuid[37]; /* XXX do we need this? */
41 __u8 c_remote_uuid[37];
44 __u32 c_generation; /* changes upon new connection */
45 __u32 c_epoch; /* changes when peer changes */
46 __u32 c_bootcount; /* peer's boot count */
48 spinlock_t c_lock; /* also protects req->rq_list */
57 __u64 c_last_xid; /* protected by c_lock */
58 __u64 c_last_committed;/* protected by c_lock */
59 struct list_head c_delayed_head;/* delayed until post-recovery */
60 struct list_head c_sending_head;/* protected by c_lock */
61 struct list_head c_dying_head; /* protected by c_lock */
62 struct recovd_data c_recovd_data;
64 struct list_head c_clients; /* XXXshaver will be c_imports */
65 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_REQUEST, PTL_RPC_REPLY, PTL_RPC_BULK */
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;
139 struct ptlrpc_bulk_page {
140 struct ptlrpc_bulk_desc *b_desc;
141 struct list_head b_link;
147 struct dentry *b_dentry;
148 int (*b_cb)(struct ptlrpc_bulk_page *);
151 struct ptlrpc_bulk_desc {
153 struct ptlrpc_connection *b_connection;
154 struct ptlrpc_client *b_client;
156 struct lustre_handle b_conn;
157 void (*b_cb)(struct ptlrpc_bulk_desc *, void *);
160 wait_queue_head_t b_waitq;
161 struct list_head b_page_list;
164 void *b_desc_private;
165 struct tq_struct b_queue;
168 ptl_handle_md_t b_md_h;
169 ptl_handle_me_t b_me_h;
171 struct iovec b_iov[16]; /* self-sized pre-allocated iov */
174 struct ptlrpc_thread {
175 struct list_head t_link;
178 wait_queue_head_t t_ctl_waitq;
181 struct ptlrpc_service {
185 /* incoming request buffers */
186 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
187 char *srv_buf[RPC_RING_LENGTH];
188 __u32 srv_ref_count[RPC_RING_LENGTH];
189 ptl_handle_me_t srv_me_h[RPC_RING_LENGTH];
191 __u32 srv_ring_length;
192 __u32 srv_req_portal;
193 __u32 srv_rep_portal;
198 ptl_handle_eq_t srv_eq_h;
200 struct lustre_peer srv_self;
202 wait_queue_head_t srv_waitq; /* all threads sleep on this */
205 struct list_head srv_reqs;
206 struct list_head srv_threads;
207 int (*srv_handler)(struct ptlrpc_request *req);
208 char *srv_name; /* only statically allocated strings here; we don't clean them */
211 static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h)
213 req->rq_reqmsg->addr = h->addr;
214 req->rq_reqmsg->cookie = h->cookie;
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,
225 int ptlrpc_put_connection(struct ptlrpc_connection *c);
226 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
227 void ptlrpc_init_connection(void);
228 void ptlrpc_cleanup_connection(void);
231 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk);
232 int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk);
233 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
234 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
235 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
236 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req);
237 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req);
238 void ptlrpc_resend_req(struct ptlrpc_request *request);
239 int ptl_send_rpc(struct ptlrpc_request *request);
240 void ptlrpc_link_svc_me(struct ptlrpc_service *service, int i);
243 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
244 struct ptlrpc_client *);
245 void ptlrpc_cleanup_client(struct obd_import *imp);
246 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req);
247 struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid);
249 int ptlrpc_queue_wait(struct ptlrpc_request *req);
250 void ptlrpc_continue_req(struct ptlrpc_request *req);
251 int ptlrpc_replay_req(struct ptlrpc_request *req);
252 void ptlrpc_restart_req(struct ptlrpc_request *req);
254 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
255 int count, int *lengths, char **bufs);
256 void ptlrpc_free_req(struct ptlrpc_request *request);
257 void ptlrpc_req_finished(struct ptlrpc_request *request);
258 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
259 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
260 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
261 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
262 int ptlrpc_check_status(struct ptlrpc_request *req, int err);
265 struct ptlrpc_service *
266 ptlrpc_init_svc(__u32 bufsize, int req_portal, int rep_portal, char *uuid,
267 svc_handler_t, char *name);
268 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
269 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
271 int ptlrpc_unregister_service(struct ptlrpc_service *service);
273 struct ptlrpc_svc_data {
275 struct ptlrpc_service *svc;
276 struct ptlrpc_thread *thread;
277 struct obd_device *dev;
280 /* rpc/pack_generic.c */
281 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
282 struct lustre_msg **msg);
283 int lustre_msg_size(int count, int *lengths);
284 int lustre_unpack_msg(struct lustre_msg *m, int len);
285 void *lustre_msg_buf(struct lustre_msg *m, int n);
287 static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc)
289 if (atomic_dec_and_test(&desc->b_refcount)) {
290 CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc);
291 ptlrpc_free_bulk(desc);
293 CDEBUG(D_PAGE, "%p -> %d\n", desc,
294 atomic_read(&desc->b_refcount));
298 static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc)
300 atomic_inc(&desc->b_refcount);
301 CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc,
302 atomic_read(&desc->b_refcount));