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 /* The following constants determine how much memory is devoted to
35 * buffering in the lustre services.
37 * ?_NEVENTS # event queue entries
39 * ?_NBUFS # request buffers
40 * ?_BUFSIZE # bytes in a single request buffer
41 * total memory = ?_NBUFS * ?_BUFSIZE
43 * ?_MAXREQSIZE # maximum request service will receive
44 * larger messages will get dropped.
45 * request buffers are auto-unlinked when less than ?_MAXREQSIZE
49 #define LDLM_NEVENTS 1024
51 #define LDLM_BUFSIZE (64 * 1024)
52 #define LDLM_MAXREQSIZE 1024
54 #define MDS_NEVENTS 1024
56 #define MDS_BUFSIZE (64 * 1024)
57 #define MDS_MAXREQSIZE 1024
59 #define OST_NEVENTS min(num_physpages / 16, 32768UL)
60 #define OST_NBUFS min(OST_NEVENTS / 128, 256UL)
61 #define OST_BUFSIZE ((OST_NEVENTS > 4096UL ? 128 : 64) * 1024)
62 #define OST_MAXREQSIZE (8 * 1024)
64 #define CONN_INVALID 1
66 struct ptlrpc_connection {
67 struct list_head c_link;
68 struct lustre_peer c_peer;
69 __u8 c_local_uuid[37]; /* XXX do we need this? */
70 __u8 c_remote_uuid[37];
73 __u32 c_generation; /* changes upon new connection */
74 __u32 c_epoch; /* changes when peer changes */
75 __u32 c_bootcount; /* peer's boot count */
77 spinlock_t c_lock; /* also protects req->rq_list */
86 __u64 c_last_xid; /* protected by c_lock */
87 __u64 c_last_committed;/* protected by c_lock */
88 struct list_head c_delayed_head;/* delayed until post-recovery */
89 struct list_head c_sending_head;/* protected by c_lock */
90 struct list_head c_dying_head; /* protected by c_lock */
91 struct recovd_data c_recovd_data;
93 struct list_head c_imports;
94 struct list_head c_exports;
95 struct list_head c_sb_chain;
96 __u32 c_flags; /* can we indicate INVALID elsewhere? */
99 struct ptlrpc_client {
100 __u32 cli_request_portal;
101 __u32 cli_reply_portal;
103 __u32 cli_target_devno;
106 // struct semaphore cli_rpc_sem; /* limits outstanding requests */
111 /* state flags of requests */
112 #define PTL_RPC_FL_INTR (1 << 0)
113 #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */
114 #define PTL_RPC_FL_SENT (1 << 2)
115 #define PTL_BULK_FL_SENT (1 << 3)
116 #define PTL_BULK_FL_RCVD (1 << 4)
117 #define PTL_RPC_FL_ERR (1 << 5)
118 #define PTL_RPC_FL_TIMEOUT (1 << 6)
119 #define PTL_RPC_FL_RESEND (1 << 7)
120 #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */
121 #define PTL_RPC_FL_FINISHED (1 << 9)
122 #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */
123 #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */
124 #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */
126 struct ptlrpc_request {
127 int rq_type; /* one of PTL_RPC_MSG_* */
128 struct list_head rq_list;
129 struct obd_device *rq_obd;
132 atomic_t rq_refcount;
134 int rq_request_portal; /* XXX FIXME bug 625069 */
135 int rq_reply_portal; /* XXX FIXME bug 625069 */
138 struct lustre_msg *rq_reqmsg;
141 struct lustre_msg *rq_repmsg;
147 // void * rq_reply_handle;
148 wait_queue_head_t rq_wait_for_rep;
151 ptl_md_t rq_reply_md;
152 ptl_handle_me_t rq_reply_me_h;
154 /* outgoing req/rep */
157 struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */
158 struct obd_export *rq_export;
159 struct ptlrpc_connection *rq_connection;
160 struct obd_import *rq_import;
161 struct ptlrpc_service *rq_svc;
163 void (*rq_replay_cb)(struct ptlrpc_request *);
166 #define DEBUG_REQ(level, req, fmt, args...) \
169 "@@@ " fmt " req x"LPD64"/t"LPD64" o%d->%s:%d lens %d/%d fl %x\n" , ## args, \
170 req->rq_xid, req->rq_transno, \
171 req->rq_reqmsg ? req->rq_reqmsg->opc : -1, \
172 req->rq_connection ? (char *)req->rq_connection->c_remote_uuid : "<?>", \
173 (req->rq_import && req->rq_import->imp_client) ? \
174 req->rq_import->imp_client->cli_request_portal : -1, \
175 req->rq_reqlen, req->rq_replen, req->rq_flags); \
178 struct ptlrpc_bulk_page {
179 struct ptlrpc_bulk_desc *bp_desc;
180 struct list_head bp_link;
183 struct page *bp_page;
186 struct dentry *bp_dentry;
187 int (*bp_cb)(struct ptlrpc_bulk_page *);
191 struct ptlrpc_bulk_desc {
193 struct ptlrpc_connection *bd_connection;
194 struct ptlrpc_client *bd_client;
196 struct lustre_handle bd_conn;
197 void (*bd_cb)(struct ptlrpc_bulk_desc *, void *);
200 wait_queue_head_t bd_waitq;
201 struct list_head bd_page_list;
203 atomic_t bd_refcount;
204 void *bd_desc_private;
206 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
207 struct work_struct bd_queue;
209 struct tq_struct bd_queue;
213 ptl_handle_md_t bd_md_h;
214 ptl_handle_me_t bd_me_h;
216 atomic_t bd_source_callback_count;
218 struct iovec bd_iov[16]; /* self-sized pre-allocated iov */
221 struct ptlrpc_thread {
222 struct list_head t_link;
225 wait_queue_head_t t_ctl_waitq;
228 struct ptlrpc_request_buffer_desc {
229 struct list_head rqbd_list;
230 struct ptlrpc_service *rqbd_service;
231 ptl_handle_me_t rqbd_me_h;
232 atomic_t rqbd_refcount;
236 struct ptlrpc_service {
240 /* incoming request buffers */
241 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
243 __u32 srv_max_req_size; /* biggest request to receive */
244 __u32 srv_buf_size; /* # bytes in a request buffer */
245 struct list_head srv_rqbds; /* all the request buffer descriptors */
246 __u32 srv_nrqbds; /* # request buffers */
247 atomic_t srv_nrqbds_receiving; /* # request buffers posted for input */
249 __u32 srv_req_portal;
250 __u32 srv_rep_portal;
255 ptl_handle_eq_t srv_eq_h;
257 struct lustre_peer srv_self;
259 wait_queue_head_t srv_waitq; /* all threads sleep on this */
262 struct list_head srv_threads;
263 int (*srv_handler)(struct ptlrpc_request *req);
264 char *srv_name; /* only statically allocated strings here; we don't clean them */
267 static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h)
269 req->rq_reqmsg->addr = h->addr;
270 req->rq_reqmsg->cookie = h->cookie;
273 typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *);
275 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
277 /* rpc/connection.c */
278 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, obd_uuid_t uuid);
279 struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer,
281 int ptlrpc_put_connection(struct ptlrpc_connection *c);
282 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
283 void ptlrpc_init_connection(void);
284 void ptlrpc_cleanup_connection(void);
287 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk);
288 int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk);
289 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
290 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
291 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
292 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req);
293 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req);
294 void ptlrpc_resend_req(struct ptlrpc_request *request);
295 int ptl_send_rpc(struct ptlrpc_request *request);
296 void ptlrpc_link_svc_me(struct ptlrpc_request_buffer_desc *rqbd);
299 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
300 struct ptlrpc_client *);
301 void ptlrpc_cleanup_client(struct obd_import *imp);
302 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req);
303 struct ptlrpc_connection *ptlrpc_uuid_to_connection(obd_uuid_t uuid);
305 int ptlrpc_queue_wait(struct ptlrpc_request *req);
306 void ptlrpc_continue_req(struct ptlrpc_request *req);
307 int ptlrpc_replay_req(struct ptlrpc_request *req);
308 void ptlrpc_restart_req(struct ptlrpc_request *req);
310 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
311 int count, int *lengths, char **bufs);
312 void ptlrpc_free_req(struct ptlrpc_request *request);
313 void ptlrpc_req_finished(struct ptlrpc_request *request);
314 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
315 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
316 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
317 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
318 int ptlrpc_check_status(struct ptlrpc_request *req, int err);
321 struct ptlrpc_service *
322 ptlrpc_init_svc(__u32 nevents, __u32 nbufs, __u32 bufsize, __u32 max_req_size,
323 int req_portal, int rep_portal,
324 obd_uuid_t uuid, svc_handler_t, char *name);
325 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
326 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
328 int ptlrpc_unregister_service(struct ptlrpc_service *service);
330 struct ptlrpc_svc_data {
332 struct ptlrpc_service *svc;
333 struct ptlrpc_thread *thread;
334 struct obd_device *dev;
337 /* rpc/pack_generic.c */
338 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
339 struct lustre_msg **msg);
340 int lustre_msg_size(int count, int *lengths);
341 int lustre_unpack_msg(struct lustre_msg *m, int len);
342 void *lustre_msg_buf(struct lustre_msg *m, int n);
344 static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc)
346 if (atomic_dec_and_test(&desc->bd_refcount)) {
347 CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc);
348 ptlrpc_free_bulk(desc);
350 CDEBUG(D_PAGE, "%p -> %d\n", desc,
351 atomic_read(&desc->bd_refcount));
355 static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc)
357 atomic_inc(&desc->bd_refcount);
358 CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc,
359 atomic_read(&desc->bd_refcount));