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_NUM_THREADS 4
50 #define LDLM_NEVENTS 1024
52 #define LDLM_BUFSIZE (32 * 1024)
53 #define LDLM_MAXREQSIZE 1024
55 #define MDT_NUM_THREADS 8
56 #define MDS_NEVENTS 1024
58 #define MDS_BUFSIZE (32 * 1024)
59 #define MDS_MAXREQSIZE 1024
61 #define OST_NUM_THREADS 6
62 #define OST_NEVENTS min(num_physpages / 16, 32768UL)
63 #define OST_NBUFS min(OST_NEVENTS / 128, 256UL)
64 #define OST_BUFSIZE ((OST_NEVENTS > 4096UL ? 128 : 32) * 1024)
65 #define OST_MAXREQSIZE (8 * 1024)
67 #define CONN_INVALID 1
69 struct ptlrpc_connection {
70 struct list_head c_link;
71 struct lustre_peer c_peer;
72 __u8 c_local_uuid[37]; /* XXX do we need this? */
73 __u8 c_remote_uuid[37];
75 __u32 c_generation; /* changes upon new connection */
76 __u32 c_epoch; /* changes when peer changes */
77 __u32 c_bootcount; /* peer's boot count */
79 spinlock_t c_lock; /* also protects req->rq_list */
86 struct list_head c_delayed_head;/* delayed until post-recovery XXX imp? */
87 struct recovd_data c_recovd_data;
89 struct list_head c_imports;
90 struct list_head c_exports;
91 struct list_head c_sb_chain;
92 __u32 c_flags; // can we indicate INVALID elsewhere?
95 struct ptlrpc_client {
96 __u32 cli_request_portal;
97 __u32 cli_reply_portal;
99 __u32 cli_target_devno;
105 /* state flags of requests */
106 #define PTL_RPC_FL_INTR (1 << 0)
107 #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */
108 #define PTL_RPC_FL_SENT (1 << 2)
109 #define PTL_BULK_FL_SENT (1 << 3)
110 #define PTL_BULK_FL_RCVD (1 << 4)
111 #define PTL_RPC_FL_ERR (1 << 5)
112 #define PTL_RPC_FL_TIMEOUT (1 << 6)
113 #define PTL_RPC_FL_RESEND (1 << 7)
114 #define PTL_RPC_FL_RESTART (1 << 8) /* operation must be restarted */
115 #define PTL_RPC_FL_FINISHED (1 << 9)
116 #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */
117 #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */
118 #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */
120 struct ptlrpc_request {
121 int rq_type; /* one of PTL_RPC_MSG_* */
122 struct list_head rq_list;
123 struct obd_device *rq_obd;
126 atomic_t rq_refcount;
128 int rq_request_portal; /* XXX FIXME bug 249 */
129 int rq_reply_portal; /* XXX FIXME bug 249 */
132 struct lustre_msg *rq_reqmsg;
135 struct lustre_msg *rq_repmsg;
141 // void * rq_reply_handle;
142 wait_queue_head_t rq_wait_for_rep;
145 ptl_md_t rq_reply_md;
146 ptl_handle_me_t rq_reply_me_h;
148 /* outgoing req/rep */
151 struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */
152 struct obd_export *rq_export;
153 struct ptlrpc_connection *rq_connection;
154 struct obd_import *rq_import;
155 struct ptlrpc_service *rq_svc;
157 void (*rq_replay_cb)(struct ptlrpc_request *);
160 #define DEBUG_REQ(level, req, fmt, args...) \
163 "@@@ " fmt " req x"LPD64"/t"LPD64" o%d->%s:%d lens %d/%d ref %d fl " \
164 "%x\n" , ## args, req->rq_xid, req->rq_transno, \
165 req->rq_reqmsg ? req->rq_reqmsg->opc : -1, \
166 req->rq_connection ? (char *)req->rq_connection->c_remote_uuid : "<?>", \
167 (req->rq_import && req->rq_import->imp_client) ? \
168 req->rq_import->imp_client->cli_request_portal : -1, \
169 req->rq_reqlen, req->rq_replen, req->rq_refcount, req->rq_flags); \
172 struct ptlrpc_bulk_page {
173 struct ptlrpc_bulk_desc *bp_desc;
174 struct list_head bp_link;
177 struct page *bp_page;
180 struct dentry *bp_dentry;
181 int (*bp_cb)(struct ptlrpc_bulk_page *);
185 struct ptlrpc_bulk_desc {
186 struct list_head bd_set_chain; /* entry in obd_brw_set */
187 struct obd_brw_set *bd_brw_set;
189 struct ptlrpc_connection *bd_connection;
190 struct ptlrpc_client *bd_client;
192 struct lustre_handle bd_conn;
193 void (*bd_ptl_ev_hdlr)(struct ptlrpc_bulk_desc *);
195 wait_queue_head_t bd_waitq;
196 struct list_head bd_page_list;
198 atomic_t bd_refcount;
199 void *bd_desc_private;
201 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
202 struct work_struct bd_queue;
204 struct tq_struct bd_queue;
208 ptl_handle_md_t bd_md_h;
209 ptl_handle_me_t bd_me_h;
211 atomic_t bd_source_callback_count;
213 struct iovec bd_iov[16]; /* self-sized pre-allocated iov */
216 struct ptlrpc_thread {
217 struct list_head t_link;
220 wait_queue_head_t t_ctl_waitq;
223 struct ptlrpc_request_buffer_desc {
224 struct list_head rqbd_list;
225 struct ptlrpc_service *rqbd_service;
226 ptl_handle_me_t rqbd_me_h;
227 atomic_t rqbd_refcount;
231 struct ptlrpc_service {
235 /* incoming request buffers */
236 /* FIXME: perhaps a list of EQs, if multiple NIs are used? */
238 __u32 srv_max_req_size; /* biggest request to receive */
239 __u32 srv_buf_size; /* # bytes in a request buffer */
240 struct list_head srv_rqbds; /* all the request buffer descriptors */
241 __u32 srv_nrqbds; /* # request buffers */
242 atomic_t srv_nrqbds_receiving; /* # request buffers posted for input */
244 __u32 srv_req_portal;
245 __u32 srv_rep_portal;
250 ptl_handle_eq_t srv_eq_h;
252 struct lustre_peer srv_self;
254 wait_queue_head_t srv_waitq; /* all threads sleep on this */
257 struct list_head srv_threads;
258 int (*srv_handler)(struct ptlrpc_request *req);
259 char *srv_name; /* only statically allocated strings here; we don't clean them */
262 static inline void ptlrpc_hdl2req(struct ptlrpc_request *req,
263 struct lustre_handle *h)
265 req->rq_reqmsg->addr = h->addr;
266 req->rq_reqmsg->cookie = h->cookie;
269 typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *);
271 typedef int (*svc_handler_t)(struct ptlrpc_request *req);
273 /* rpc/connection.c */
274 void ptlrpc_readdress_connection(struct ptlrpc_connection *, obd_uuid_t uuid);
275 struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer,
277 int ptlrpc_put_connection(struct ptlrpc_connection *c);
278 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *);
279 void ptlrpc_init_connection(void);
280 void ptlrpc_cleanup_connection(void);
283 int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk);
284 int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk);
285 int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *);
286 int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *);
287 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk);
288 struct obd_brw_set *obd_brw_set_new(void);
289 void obd_brw_set_add(struct obd_brw_set *, struct ptlrpc_bulk_desc *);
290 void obd_brw_set_free(struct obd_brw_set *);
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 ll_brw_sync_wait(struct obd_brw_set *, int phase);
307 int ptlrpc_queue_wait(struct ptlrpc_request *req);
308 void ptlrpc_continue_req(struct ptlrpc_request *req);
309 int ptlrpc_replay_req(struct ptlrpc_request *req);
310 void ptlrpc_restart_req(struct ptlrpc_request *req);
312 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
313 int count, int *lengths, char **bufs);
314 void ptlrpc_free_req(struct ptlrpc_request *request);
315 void ptlrpc_req_finished(struct ptlrpc_request *request);
316 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *);
317 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk);
318 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc);
319 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page);
322 struct ptlrpc_service *
323 ptlrpc_init_svc(__u32 nevents, __u32 nbufs, __u32 bufsize, __u32 max_req_size,
324 int req_portal, int rep_portal,
325 obd_uuid_t uuid, svc_handler_t, char *name);
326 void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
327 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
329 int ptlrpc_unregister_service(struct ptlrpc_service *service);
331 struct ptlrpc_svc_data {
333 struct ptlrpc_service *svc;
334 struct ptlrpc_thread *thread;
335 struct obd_device *dev;
338 /* rpc/pack_generic.c */
339 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
340 struct lustre_msg **msg);
341 int lustre_msg_size(int count, int *lengths);
342 int lustre_unpack_msg(struct lustre_msg *m, int len);
343 void *lustre_msg_buf(struct lustre_msg *m, int n);
345 static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc)
347 CDEBUG(D_PAGE, "%p -> %d\n", desc, atomic_read(&desc->bd_refcount) - 1);
349 if (atomic_dec_and_test(&desc->bd_refcount)) {
350 CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc);
351 ptlrpc_free_bulk(desc);
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));