4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2013, Intel Corporation.
25 * Use is subject to license terms.
27 * lustre/osp/lwp_dev.c
29 * Light Weight Proxy, which is just for managing the connection established
30 * from OSTs/MDTs to MDT0.
32 * Author: <di.wang@intel.com>
33 * Author: <yawei.niu@intel.com>
35 #define DEBUG_SUBSYSTEM S_OST
37 #include <obd_class.h>
38 #include <lustre_param.h>
39 #include <lustre_log.h>
42 struct lu_device lpd_dev;
43 struct obd_device *lpd_obd;
44 struct obd_uuid lpd_cluuid;
45 struct obd_export *lpd_exp;
49 static inline struct lwp_device *lu2lwp_dev(struct lu_device *d)
51 return container_of0(d, struct lwp_device, lpd_dev);
54 static inline struct lu_device *lwp2lu_dev(struct lwp_device *d)
59 static int lwp_name2fsname(char *lwpname, char *fsname)
63 LASSERT(lwpname != NULL);
64 LASSERT(fsname != NULL);
66 sprintf(fsname, "-%s-", LUSTRE_LWP_NAME);
68 ptr = strstr(lwpname, fsname);
72 while (*(--ptr) != '-') {
77 strncpy(fsname, lwpname, ptr - lwpname);
78 fsname[ptr - lwpname] = '\0';
83 static int lwp_setup(const struct lu_env *env, struct lwp_device *lwp,
86 struct lustre_cfg_bufs *bufs = NULL;
87 struct lustre_cfg *lcfg = NULL;
88 char *lwpname = lwp->lpd_obd->obd_name;
90 char *server_uuid = NULL;
92 struct obd_import *imp;
100 OBD_ALLOC(fsname, strlen(lwpname));
102 GOTO(out, rc = -ENOMEM);
104 rc = lwp_name2fsname(lwpname, fsname);
106 CERROR("%s: failed to get fsname from lwpname. %d\n",
111 OBD_ALLOC(server_uuid, strlen(fsname) + 15);
112 if (server_uuid == NULL)
113 GOTO(out, rc = -ENOMEM);
115 sprintf(server_uuid, "%s-MDT0000_UUID", fsname);
116 lustre_cfg_bufs_reset(bufs, lwpname);
117 lustre_cfg_bufs_set_string(bufs, 1, server_uuid);
118 lustre_cfg_bufs_set_string(bufs, 2, nidstring);
119 lcfg = lustre_cfg_new(LCFG_SETUP, bufs);
121 GOTO(out, rc = -ENOMEM);
123 rc = client_obd_setup(lwp->lpd_obd, lcfg);
125 CERROR("%s: client obd setup error: rc = %d\n",
126 lwp->lpd_obd->obd_name, rc);
130 imp = lwp->lpd_obd->u.cli.cl_import;
131 rc = ptlrpc_init_import(imp);
135 ll_generate_random_uuid(uuid);
136 class_uuid_unparse(uuid, &lwp->lpd_cluuid);
140 if (server_uuid != NULL)
141 OBD_FREE(server_uuid, strlen(fsname) + 15);
143 OBD_FREE(fsname, strlen(lwpname));
145 lustre_cfg_free(lcfg);
147 client_obd_cleanup(lwp->lpd_obd);
151 int lwp_disconnect(struct lwp_device *d)
153 struct obd_import *imp;
156 imp = d->lpd_obd->u.cli.cl_import;
158 /* Mark import deactivated now, so we don't try to reconnect if any
159 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
160 * fully deactivate the import, or that would drop all requests. */
161 LASSERT(imp != NULL);
162 spin_lock(&imp->imp_lock);
163 imp->imp_deactive = 1;
164 spin_unlock(&imp->imp_lock);
166 ptlrpc_deactivate_import(imp);
168 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
169 * delete it regardless. (It's safe to delete an import that was
171 (void)ptlrpc_pinger_del_import(imp);
173 rc = ptlrpc_disconnect_import(imp, 0);
174 if (rc && rc != -ETIMEDOUT)
175 CERROR("%s: can't disconnect: rc = %d\n",
176 d->lpd_obd->obd_name, rc);
178 ptlrpc_invalidate_import(imp);
183 static int lwp_process_config(const struct lu_env *env,
184 struct lu_device *dev, struct lustre_cfg *lcfg)
186 struct lwp_device *d = lu2lwp_dev(dev);
190 switch (lcfg->lcfg_command) {
191 case LCFG_PRE_CLEANUP:
193 rc = lwp_disconnect(d);
199 CERROR("%s: unknown command %u\n",
200 (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
208 const struct lu_device_operations lwp_lu_ops = {
209 .ldo_process_config = lwp_process_config,
212 static struct lprocfs_vars lprocfs_lwp_module_vars[] = {
213 { "num_refs", lprocfs_rd_numrefs, 0, 0 },
217 static struct lprocfs_vars lprocfs_lwp_obd_vars[] = {
221 void lprocfs_lwp_init_vars(struct lprocfs_static_vars *lvars)
223 lvars->module_vars = lprocfs_lwp_module_vars;
224 lvars->obd_vars = lprocfs_lwp_obd_vars;
227 int lwp_init0(const struct lu_env *env, struct lwp_device *lwp,
228 struct lu_device_type *ldt, struct lustre_cfg *cfg)
230 struct lprocfs_static_vars lvars = { 0 };
234 lwp->lpd_obd = class_name2obd(lustre_cfg_string(cfg, 0));
235 if (lwp->lpd_obd == NULL) {
236 CERROR("Cannot find obd with name %s\n",
237 lustre_cfg_string(cfg, 0));
241 lwp->lpd_dev.ld_ops = &lwp_lu_ops;
242 lwp->lpd_obd->obd_lu_dev = &lwp->lpd_dev;
244 rc = ptlrpcd_addref();
246 CERROR("%s: ptlrpcd addref error: rc =%d\n",
247 lwp->lpd_obd->obd_name, rc);
251 rc = lwp_setup(env, lwp, lustre_cfg_string(cfg, 1));
253 CERROR("%s: setup lwp failed. %d\n",
254 lwp->lpd_obd->obd_name, rc);
259 lprocfs_lwp_init_vars(&lvars);
260 if (lprocfs_obd_setup(lwp->lpd_obd, lvars.obd_vars) == 0)
261 ptlrpc_lprocfs_register_obd(lwp->lpd_obd);
266 static struct lu_device *lwp_device_free(const struct lu_env *env,
267 struct lu_device *lu)
269 struct lwp_device *m = lu2lwp_dev(lu);
272 if (cfs_atomic_read(&lu->ld_ref) && lu->ld_site) {
273 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
274 lu_site_print(env, lu->ld_site, &msgdata, lu_cdebug_printer);
276 lu_device_fini(&m->lpd_dev);
281 static struct lu_device *lwp_device_alloc(const struct lu_env *env,
282 struct lu_device_type *t,
283 struct lustre_cfg *lcfg)
285 struct lwp_device *lwp;
290 l = ERR_PTR(-ENOMEM);
295 lu_device_init(&lwp->lpd_dev, t);
296 rc = lwp_init0(env, lwp, t, lcfg);
298 lwp_device_free(env, l);
306 static struct lu_device *lwp_device_fini(const struct lu_env *env,
309 struct lwp_device *m = lu2lwp_dev(d);
310 struct obd_import *imp;
314 if (m->lpd_exp != NULL)
315 class_disconnect(m->lpd_exp);
317 imp = m->lpd_obd->u.cli.cl_import;
319 if (imp->imp_rq_pool) {
320 ptlrpc_free_rq_pool(imp->imp_rq_pool);
321 imp->imp_rq_pool = NULL;
324 obd_cleanup_client_import(m->lpd_obd);
327 ptlrpc_lprocfs_unregister_obd(m->lpd_obd);
328 lprocfs_obd_cleanup(m->lpd_obd);
330 rc = client_obd_cleanup(m->lpd_obd);
331 LASSERTF(rc == 0, "error %d\n", rc);
338 static struct lu_device_type_operations lwp_device_type_ops = {
339 .ldto_device_alloc = lwp_device_alloc,
340 .ldto_device_free = lwp_device_free,
341 .ldto_device_fini = lwp_device_fini
344 struct lu_device_type lwp_device_type = {
345 .ldt_tags = LU_DEVICE_DT,
346 .ldt_name = LUSTRE_LWP_NAME,
347 .ldt_ops = &lwp_device_type_ops,
348 .ldt_ctx_tags = LCT_MD_THREAD
351 static int lwp_obd_connect(const struct lu_env *env, struct obd_export **exp,
352 struct obd_device *obd, struct obd_uuid *cluuid,
353 struct obd_connect_data *data, void *localdata)
355 struct lwp_device *lwp = lu2lwp_dev(obd->obd_lu_dev);
356 struct obd_connect_data *ocd;
357 struct obd_import *imp;
358 struct lustre_handle conn;
363 CDEBUG(D_CONFIG, "connect #%d\n", lwp->lpd_connects);
365 rc = class_connect(&conn, obd, cluuid);
369 *exp = class_conn2export(&conn);
372 /* Why should there ever be more than 1 connect? */
374 LASSERT(lwp->lpd_connects == 1);
376 imp = lwp->lpd_obd->u.cli.cl_import;
377 imp->imp_dlm_handle = conn;
379 LASSERT(data != NULL);
380 ocd = &imp->imp_connect_data;
383 LASSERT(ocd->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT);
385 ocd->ocd_version = LUSTRE_VERSION_CODE;
386 imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
388 rc = ptlrpc_connect_import(imp);
390 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
394 ptlrpc_pinger_add_import(imp);
400 static int lwp_obd_disconnect(struct obd_export *exp)
402 struct obd_device *obd = exp->exp_obd;
403 struct lwp_device *lwp = lu2lwp_dev(obd->obd_lu_dev);
407 /* Only disconnect the underlying layers on the final disconnect. */
408 LASSERT(lwp->lpd_connects == 1);
411 rc = class_disconnect(exp);
413 CERROR("%s: class disconnect error: rc = %d\n",
419 static int lwp_import_event(struct obd_device *obd, struct obd_import *imp,
420 enum obd_import_event event)
423 case IMP_EVENT_DISCON:
424 case IMP_EVENT_INACTIVE:
425 case IMP_EVENT_ACTIVE:
427 case IMP_EVENT_INVALIDATE:
428 if (obd->obd_namespace == NULL)
430 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
435 CERROR("%s: unsupported import event: %#x\n",
436 obd->obd_name, event);
441 struct obd_ops lwp_obd_device_ops = {
442 .o_owner = THIS_MODULE,
443 .o_add_conn = client_import_add_conn,
444 .o_del_conn = client_import_del_conn,
445 .o_connect = lwp_obd_connect,
446 .o_disconnect = lwp_obd_disconnect,
447 .o_import_event = lwp_import_event,