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 code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * by Cluster File Systems, Inc.
14 #include <linux/version.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <asm/unistd.h>
19 #define DEBUG_SUBSYSTEM S_LDLM
21 #include <linux/lustre_dlm.h>
23 extern kmem_cache_t *ldlm_resource_slab;
24 extern kmem_cache_t *ldlm_lock_slab;
26 static int _ldlm_namespace_new(struct obd_device *obddev,
27 struct ptlrpc_request *req)
29 struct ldlm_request *dlm_req;
30 struct ldlm_namespace *ns;
35 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
37 CERROR("out of memory\n");
38 req->rq_status = -ENOMEM;
41 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
43 err = ldlm_namespace_new(obddev, dlm_req->lock_desc.l_resource.lr_ns_id,
47 CERROR("err = %d\n", err);
52 static int _ldlm_enqueue(struct ptlrpc_request *req)
54 struct ldlm_reply *dlm_rep;
55 struct ldlm_request *dlm_req;
56 int rc, size = sizeof(*dlm_rep);
58 struct ldlm_lock *lock;
61 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
63 CERROR("out of memory\n");
64 req->rq_status = -ENOMEM;
67 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
68 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
70 memcpy(&dlm_rep->lock_extent, &dlm_req->lock_desc.l_extent,
71 sizeof(dlm_rep->lock_extent));
72 dlm_rep->flags = dlm_req->flags;
74 err = ldlm_local_lock_create(dlm_req->lock_desc.l_resource.lr_ns_id,
75 &dlm_req->lock_handle2,
76 dlm_req->lock_desc.l_resource.lr_name,
77 dlm_req->lock_desc.l_resource.lr_type,
78 &dlm_rep->lock_handle);
82 err = ldlm_local_lock_enqueue(&dlm_rep->lock_handle,
83 dlm_req->lock_desc.l_req_mode,
84 &dlm_rep->lock_extent,
88 lustre_msg_buf(req->rq_reqmsg, 1),
89 req->rq_reqmsg->buflens[1]);
93 lock = ldlm_handle2object(&dlm_rep->lock_handle);
94 memcpy(&lock->l_remote_handle, &dlm_req->lock_handle1,
95 sizeof(lock->l_remote_handle));
96 lock->l_connection = ptlrpc_connection_addref(req->rq_connection);
100 CERROR("err = %d\n", err);
105 static int _ldlm_convert(struct ptlrpc_request *req)
107 struct ldlm_request *dlm_req;
111 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
113 CERROR("out of memory\n");
114 req->rq_status = -ENOMEM;
117 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
120 ldlm_local_lock_convert(&dlm_req->lock_handle1,
121 dlm_req->lock_desc.l_req_mode,
126 static int _ldlm_cancel(struct ptlrpc_request *req)
128 struct ldlm_request *dlm_req;
132 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
134 CERROR("out of memory\n");
135 req->rq_status = -ENOMEM;
138 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
140 req->rq_status = ldlm_local_lock_cancel(&dlm_req->lock_handle1);
144 static int _ldlm_callback(struct ptlrpc_request *req)
146 struct ldlm_request *dlm_req;
147 struct ldlm_lock *lock;
151 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
153 CERROR("out of memory\n");
154 req->rq_status = -ENOMEM;
157 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
159 lock = ldlm_handle2object(&dlm_req->lock_handle1);
160 ldlm_lock_dump(lock);
161 if (dlm_req->lock_handle2.addr) {
162 CERROR("Got blocked callback for lock %p.\n", lock);
163 /* FIXME: do something impressive. */
165 CERROR("Got granted callback for lock %p.\n", lock);
166 lock->l_granted_mode = lock->l_req_mode;
167 wake_up(&lock->l_waitq);
175 static int ldlm_handle(struct obd_device *dev, struct ptlrpc_service *svc,
176 struct ptlrpc_request *req)
181 rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
183 CERROR("lustre_ldlm: Invalid request\n");
187 if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
188 CERROR("lustre_ldlm: wrong packet type sent %d\n",
189 req->rq_reqmsg->type);
190 GOTO(out, rc = -EINVAL);
193 switch (req->rq_reqmsg->opc) {
194 case LDLM_NAMESPACE_NEW:
195 CDEBUG(D_INODE, "namespace_new\n");
196 OBD_FAIL_RETURN(OBD_FAIL_LDLM_NAMESPACE_NEW, 0);
197 rc = _ldlm_namespace_new(dev, req);
201 CDEBUG(D_INODE, "enqueue\n");
202 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
203 rc = _ldlm_enqueue(req);
207 CDEBUG(D_INODE, "convert\n");
208 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
209 rc = _ldlm_convert(req);
213 CDEBUG(D_INODE, "cancel\n");
214 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
215 rc = _ldlm_cancel(req);
219 CDEBUG(D_INODE, "callback\n");
220 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CALLBACK, 0);
221 rc = _ldlm_callback(req);
225 rc = ptlrpc_error(svc, req);
231 RETURN(ptlrpc_error(svc, req));
233 RETURN(ptlrpc_reply(svc, req));
236 static int ldlm_iocontrol(int cmd, struct obd_conn *conn, int len, void *karg,
239 struct obd_device *obddev = conn->oc_dev;
240 struct ptlrpc_connection *connection;
244 if (_IOC_TYPE(cmd) != IOC_LDLM_TYPE || _IOC_NR(cmd) < IOC_LDLM_MIN_NR ||
245 _IOC_NR(cmd) > IOC_LDLM_MAX_NR) {
246 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
247 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
251 ptlrpc_init_client(NULL, NULL,
252 LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
253 obddev->u.ldlm.ldlm_client);
254 connection = ptlrpc_uuid_to_connection("ldlm");
256 CERROR("No LDLM UUID found: assuming ldlm is local.\n");
259 case IOC_LDLM_TEST: {
260 err = ldlm_test(obddev, connection);
261 CERROR("-- done err %d\n", err);
265 GOTO(out, err = -EINVAL);
270 ptlrpc_put_connection(connection);
274 static int ldlm_setup(struct obd_device *obddev, obd_count len, void *data)
276 struct ldlm_obd *ldlm = &obddev->u.ldlm;
280 ldlm_spinlock = SPIN_LOCK_UNLOCKED;
283 ptlrpc_init_svc(64 * 1024, LDLM_REQUEST_PORTAL,
284 LDLM_REPLY_PORTAL, "self", ldlm_handle);
285 if (!ldlm->ldlm_service)
288 err = ptlrpc_start_thread(obddev, ldlm->ldlm_service, "lustre_dlm");
290 CERROR("cannot start thread\n");
294 OBD_ALLOC(ldlm->ldlm_client, sizeof(*ldlm->ldlm_client));
295 if (ldlm->ldlm_client == NULL)
297 ptlrpc_init_client(NULL, NULL,
298 LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
305 static int cleanup_resource(struct ldlm_resource *res, struct list_head *q)
307 struct list_head *tmp, *pos;
310 list_for_each_safe(tmp, pos, q) {
311 struct ldlm_lock *lock;
314 /* Res was already cleaned up. */
318 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
320 ldlm_resource_del_lock(lock);
321 ldlm_lock_free(lock);
322 rc = ldlm_resource_put(res);
328 static int do_free_namespace(struct ldlm_namespace *ns)
330 struct list_head *tmp, *pos;
333 for (i = 0; i < RES_HASH_SIZE; i++) {
334 list_for_each_safe(tmp, pos, &(ns->ns_hash[i])) {
335 struct ldlm_resource *res;
336 res = list_entry(tmp, struct ldlm_resource, lr_hash);
337 list_del_init(&res->lr_hash);
339 rc = cleanup_resource(res, &res->lr_granted);
341 rc = cleanup_resource(res, &res->lr_converting);
343 rc = cleanup_resource(res, &res->lr_waiting);
346 rc = ldlm_resource_put(res);
350 return ldlm_namespace_free(ns);
353 static int ldlm_free_all(struct obd_device *obddev)
355 struct list_head *tmp, *pos;
360 list_for_each_safe(tmp, pos, &ldlm_namespaces) {
361 struct ldlm_namespace *ns;
362 ns = list_entry(tmp, struct ldlm_namespace, ns_link);
364 rc |= do_free_namespace(ns);
372 static int ldlm_cleanup(struct obd_device *obddev)
374 struct ldlm_obd *ldlm = &obddev->u.ldlm;
377 ptlrpc_stop_thread(ldlm->ldlm_service);
378 rpc_unregister_service(ldlm->ldlm_service);
380 if (!list_empty(&ldlm->ldlm_service->srv_reqs)) {
381 // XXX reply with errors and clean up
382 CERROR("Request list not empty!\n");
385 OBD_FREE(ldlm->ldlm_client, sizeof(*ldlm->ldlm_client));
386 OBD_FREE(ldlm->ldlm_service, sizeof(*ldlm->ldlm_service));
388 if (ldlm_free_all(obddev)) {
389 CERROR("ldlm_free_all could not complete.\n");
397 struct obd_ops ldlm_obd_ops = {
398 o_iocontrol: ldlm_iocontrol,
400 o_cleanup: ldlm_cleanup,
401 o_connect: gen_connect,
402 o_disconnect: gen_disconnect
406 static int __init ldlm_init(void)
408 int rc = obd_register_type(&ldlm_obd_ops, OBD_LDLM_DEVICENAME);
412 ldlm_resource_slab = kmem_cache_create("ldlm_resources",
413 sizeof(struct ldlm_resource), 0,
414 SLAB_HWCACHE_ALIGN, NULL, NULL);
415 if (ldlm_resource_slab == NULL)
418 ldlm_lock_slab = kmem_cache_create("ldlm_locks",
419 sizeof(struct ldlm_lock), 0,
420 SLAB_HWCACHE_ALIGN, NULL, NULL);
421 if (ldlm_lock_slab == NULL) {
422 kmem_cache_destroy(ldlm_resource_slab);
429 static void __exit ldlm_exit(void)
431 obd_unregister_type(OBD_LDLM_DEVICENAME);
432 kmem_cache_destroy(ldlm_resource_slab);
433 kmem_cache_destroy(ldlm_lock_slab);
436 MODULE_AUTHOR("Cluster File Systems, Inc. <braam@clusterfs.com>");
437 MODULE_DESCRIPTION("Lustre Lock Management Module v0.1");
438 MODULE_LICENSE("GPL");
440 module_init(ldlm_init);
441 module_exit(ldlm_exit);