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.
25 #include <linux/config.h>
26 #include <linux/module.h>
27 #include <linux/kernel.h>
29 #define DEBUG_SUBSYSTEM S_RPC
31 #include <linux/obd_support.h>
32 #include <linux/obd_class.h>
33 #include <linux/lustre_net.h>
35 extern int server_request_callback(ptl_event_t *ev, void *data);
36 extern int ptl_handled_rpc(struct ptlrpc_service *service, void *start);
38 static int ptlrpc_check_event(struct ptlrpc_service *svc)
42 spin_lock(&svc->srv_lock);
43 if (sigismember(&(current->pending.signal), SIGKILL) ||
44 sigismember(&(current->pending.signal), SIGSTOP) ||
45 sigismember(&(current->pending.signal), SIGCONT) ||
46 sigismember(&(current->pending.signal), SIGINT)) {
47 svc->srv_flags |= SVC_KILLED;
53 if ( svc->srv_flags & SVC_STOPPING ) {
59 if (svc->srv_flags & SVC_EVENT)
62 if ( svc->srv_eq_h ) {
64 err = PtlEQGet(svc->srv_eq_h, &svc->srv_ev);
67 svc->srv_flags |= SVC_EVENT;
73 if (err != PTL_EQ_EMPTY) {
74 CDEBUG(D_NET, "BUG: PtlEQGet returned %d\n", rc);
83 if (!list_empty(&svc->srv_reqs)) {
84 svc->srv_flags |= SVC_LIST;
92 spin_unlock(&svc->srv_lock);
96 struct ptlrpc_service *
97 ptlrpc_init_svc(__u32 bufsize, int req_portal, int rep_portal, char *uuid,
98 svc_handler_t handler)
101 struct ptlrpc_service *svc;
103 OBD_ALLOC(svc, sizeof(*svc));
105 CERROR("no memory\n");
109 memset(svc, 0, sizeof(*svc));
111 spin_lock_init(&svc->srv_lock);
112 INIT_LIST_HEAD(&svc->srv_reqs);
113 init_waitqueue_head(&svc->srv_ctl_waitq);
114 init_waitqueue_head(&svc->srv_waitq);
116 svc->srv_thread = NULL;
119 svc->srv_buf_size = bufsize;
120 svc->srv_rep_portal = rep_portal;
121 svc->srv_req_portal = req_portal;
123 svc->srv_handler = handler;
124 err = kportal_uuid_to_peer(uuid, &svc->srv_self);
126 CERROR("cannot get peer for uuid %s", uuid);
127 OBD_FREE(svc, sizeof(*svc));
133 static int ptlrpc_main(void *arg)
136 struct ptlrpc_svc_data *data = (struct ptlrpc_svc_data *)arg;
137 struct obd_device *obddev = data->dev;
138 struct ptlrpc_service *svc = data->svc;
144 spin_lock_irq(¤t->sigmask_lock);
145 sigfillset(¤t->blocked);
146 recalc_sigpending(current);
147 spin_unlock_irq(¤t->sigmask_lock);
149 sprintf(current->comm, data->name);
151 /* Record that the thread is running */
152 svc->srv_thread = current;
153 svc->srv_flags = SVC_RUNNING;
154 wake_up(&svc->srv_ctl_waitq);
156 /* XXX maintain a list of all managed devices: insert here */
158 /* And now, loop forever on requests */
160 wait_event(svc->srv_waitq, ptlrpc_check_event(svc));
162 spin_lock(&svc->srv_lock);
163 if (svc->srv_flags & SVC_SIGNAL) {
165 spin_unlock(&svc->srv_lock);
169 if (svc->srv_flags & SVC_STOPPING) {
171 spin_unlock(&svc->srv_lock);
175 if (svc->srv_flags & SVC_EVENT) {
176 struct ptlrpc_request request;
178 svc->srv_flags = SVC_RUNNING;
180 /* FIXME: If we move to an event-driven model,
181 * we should put the request on the stack of
182 * mds_handle instead. */
183 start = svc->srv_ev.mem_desc.start;
184 memset(&request, 0, sizeof(request));
185 request.rq_obd = obddev;
186 request.rq_reqbuf = (svc->srv_ev.mem_desc.start +
188 request.rq_reqlen = svc->srv_ev.mem_desc.length;
189 request.rq_xid = svc->srv_ev.match_bits;
190 CDEBUG(D_NET, "got req %d\n", request.rq_xid);
192 request.rq_peer.peer_nid = svc->srv_ev.initiator.nid;
193 /* FIXME: this NI should be the incoming NI.
194 * We don't know how to find that from here. */
195 request.rq_peer.peer_ni = svc->srv_self.peer_ni;
196 svc->srv_flags &= ~SVC_EVENT;
198 spin_unlock(&svc->srv_lock);
199 rc = svc->srv_handler(obddev, svc, &request);
200 ptl_handled_rpc(svc, start);
204 if (svc->srv_flags & SVC_LIST) {
205 struct ptlrpc_request *request;
206 svc->srv_flags = SVC_RUNNING;
208 request = list_entry(svc->srv_reqs.next,
209 struct ptlrpc_request,
211 list_del(&request->rq_list);
212 spin_unlock(&svc->srv_lock);
213 rc = svc->srv_handler(obddev, svc, request);
216 CERROR("unknown break in service");
217 spin_unlock(&svc->srv_lock);
221 svc->srv_thread = NULL;
222 svc->srv_flags = SVC_STOPPED;
223 wake_up(&svc->srv_ctl_waitq);
224 CDEBUG(D_NET, "svc exiting process %d\n", current->pid);
228 void ptlrpc_stop_thread(struct ptlrpc_service *svc)
230 svc->srv_flags = SVC_STOPPING;
232 wake_up(&svc->srv_waitq);
233 wait_event_interruptible(svc->srv_ctl_waitq,
234 (svc->srv_flags & SVC_STOPPED));
237 int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc,
240 struct ptlrpc_svc_data d;
248 init_waitqueue_head(&svc->srv_waitq);
250 init_waitqueue_head(&svc->srv_ctl_waitq);
251 rc = kernel_thread(ptlrpc_main, (void *) &d,
252 CLONE_VM | CLONE_FS | CLONE_FILES);
254 CERROR("cannot start thread\n");
257 wait_event(svc->srv_ctl_waitq, svc->srv_flags & SVC_RUNNING);
264 int rpc_register_service(struct ptlrpc_service *service, char *uuid)
266 struct lustre_peer peer;
269 rc = kportal_uuid_to_peer(uuid, &peer);
271 CERROR("Invalid uuid \"%s\"\n", uuid);
275 service->srv_ring_length = RPC_RING_LENGTH;
276 service->srv_md_active = 0;
278 service->srv_id.addr_kind = PTL_ADDR_GID;
279 service->srv_id.gid = PTL_ID_ANY;
280 service->srv_id.rid = PTL_ID_ANY;
282 rc = PtlEQAlloc(peer.peer_ni, 128, server_request_callback,
283 service, &(service->srv_eq_h));
286 CERROR("PtlEQAlloc failed: %d\n", rc);
290 CDEBUG(D_NET, "Starting service listening on portal %d\n",
291 service->srv_req_portal);
293 /* Attach the leading ME on which we build the ring */
294 rc = PtlMEAttach(peer.peer_ni, service->srv_req_portal,
295 service->srv_id, 0, ~0, PTL_RETAIN,
296 &(service->srv_me_h[0]));
299 CERROR("PtlMEAttach failed: %d\n", rc);
303 for (i = 0; i < service->srv_ring_length; i++) {
304 OBD_ALLOC(service->srv_buf[i], service->srv_buf_size);
306 if (service->srv_buf[i] == NULL) {
307 CERROR("no memory\n");
312 /* Insert additional ME's to the ring */
314 rc = PtlMEInsert(service->srv_me_h[i-1],
315 service->srv_id, 0, ~0, PTL_RETAIN,
316 PTL_INS_AFTER,&(service->srv_me_h[i]));
317 service->srv_me_tail = i;
320 CERROR("PtlMEInsert failed: %d\n", rc);
325 service->srv_ref_count[i] = 0;
326 service->srv_md[i].start = service->srv_buf[i];
327 service->srv_md[i].length = service->srv_buf_size;
328 service->srv_md[i].max_offset = service->srv_buf_size;
329 service->srv_md[i].threshold = PTL_MD_THRESH_INF;
330 service->srv_md[i].options = PTL_MD_OP_PUT;
331 service->srv_md[i].user_ptr = service;
332 service->srv_md[i].eventq = service->srv_eq_h;
333 service->srv_md[i].max_offset = service->srv_buf_size;
335 rc = PtlMDAttach(service->srv_me_h[i], service->srv_md[i],
336 PTL_RETAIN, &(service->srv_md_h[i]));
340 CERROR("PtlMDAttach failed: %d\n", rc);
348 int rpc_unregister_service(struct ptlrpc_service *service)
352 for (i = 0; i < service->srv_ring_length; i++) {
353 rc = PtlMEUnlink(service->srv_me_h[i]);
355 CERROR("PtlMEUnlink failed: %d\n", rc);
357 if (service->srv_buf[i] != NULL)
358 OBD_FREE(service->srv_buf[i], service->srv_buf_size);
359 service->srv_buf[i] = NULL;
362 rc = PtlEQFree(service->srv_eq_h);
364 CERROR("PtlEQFree failed: %d\n", rc);