1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 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.
23 # define EXPORT_SYMTAB
25 #define DEBUG_SUBSYSTEM S_LDLM
28 # include <linux/module.h>
30 # include <liblustre.h>
32 #include <linux/obd.h>
33 #include <linux/obd_ost.h> /* for LUSTRE_OSC_NAME */
34 #include <linux/lustre_mds.h> /* for LUSTRE_MDC_NAME */
35 #include <linux/lustre_mgmt.h>
36 #include <linux/lustre_dlm.h>
37 #include <linux/lustre_net.h>
39 int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf)
41 struct ptlrpc_connection *conn;
42 struct lustre_cfg* lcfg = buf;
43 struct client_obd *cli = &obddev->u.cli;
44 struct obd_import *imp;
45 struct obd_uuid server_uuid;
46 int rq_portal, rp_portal, connect_op;
47 char *name = obddev->obd_type->typ_name;
48 char *mgmt_name = NULL;
50 struct obd_device *mgmt_obd;
51 mgmtcli_register_for_events_t register_f;
54 /* In a more perfect world, we would hang a ptlrpc_client off of
55 * obd_type and just use the values from there. */
56 if (!strcmp(name, LUSTRE_OSC_NAME)) {
57 rq_portal = OST_REQUEST_PORTAL;
58 rp_portal = OSC_REPLY_PORTAL;
59 connect_op = OST_CONNECT;
60 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
61 rq_portal = MDS_REQUEST_PORTAL;
62 rp_portal = MDC_REPLY_PORTAL;
63 connect_op = MDS_CONNECT;
64 } else if (!strcmp(name, LUSTRE_MGMTCLI_NAME)) {
65 rq_portal = MGMT_REQUEST_PORTAL;
66 rp_portal = MGMT_REPLY_PORTAL;
67 connect_op = MGMT_CONNECT;
69 CERROR("unknown client OBD type \"%s\", can't setup\n",
74 if (lcfg->lcfg_inllen1 < 1) {
75 CERROR("requires a TARGET UUID\n");
79 if (lcfg->lcfg_inllen1 > 37) {
80 CERROR("client UUID must be less than 38 characters\n");
84 if (lcfg->lcfg_inllen2 < 1) {
85 CERROR("setup requires a SERVER UUID\n");
89 if (lcfg->lcfg_inllen2 > 37) {
90 CERROR("target UUID must be less than 38 characters\n");
94 sema_init(&cli->cl_sem, 1);
95 cli->cl_conn_count = 0;
96 memcpy(server_uuid.uuid, lcfg->lcfg_inlbuf2, MIN(lcfg->lcfg_inllen2,
97 sizeof(server_uuid)));
99 init_MUTEX(&cli->cl_dirty_sem);
101 cli->cl_dirty_granted = 0;
102 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
103 cli->cl_ost_can_grant = 1;
104 INIT_LIST_HEAD(&cli->cl_cache_waiters);
105 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
106 INIT_LIST_HEAD(&cli->cl_loi_write_list);
107 spin_lock_init(&cli->cl_loi_list_lock);
108 cli->cl_brw_in_flight = 0;
109 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
110 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
111 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
112 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
113 cli->cl_max_pages_per_rpc = PTL_MD_MAX_PAGES;
114 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
118 CERROR("ldlm_get_ref failed: %d\n", rc);
122 conn = ptlrpc_uuid_to_connection(&server_uuid);
124 GOTO(err_ldlm, rc = -ENOENT);
126 ptlrpc_init_client(rq_portal, rp_portal, name,
127 &obddev->obd_ldlm_client);
129 imp = class_new_import();
131 ptlrpc_put_connection(conn);
132 GOTO(err_ldlm, rc = -ENOENT);
134 imp->imp_connection = conn;
135 imp->imp_client = &obddev->obd_ldlm_client;
136 imp->imp_obd = obddev;
137 imp->imp_connect_op = connect_op;
138 imp->imp_generation = 0;
139 INIT_LIST_HEAD(&imp->imp_pinger_chain);
140 memcpy(imp->imp_target_uuid.uuid, lcfg->lcfg_inlbuf1,
142 class_import_put(imp);
144 cli->cl_import = imp;
145 cli->cl_max_mds_easize = sizeof(struct lov_mds_md);
146 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
147 cli->cl_sandev = to_kdev_t(0);
149 if (lcfg->lcfg_inllen3 != 0) {
150 if (!strcmp(lcfg->lcfg_inlbuf3, "inactive")) {
151 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
152 name, obddev->obd_name,
153 imp->imp_target_uuid.uuid);
154 imp->imp_invalid = 1;
156 if (lcfg->lcfg_inllen4 != 0)
157 mgmt_name = lcfg->lcfg_inlbuf4;
159 mgmt_name = lcfg->lcfg_inlbuf3;
163 if (mgmt_name != NULL) {
164 /* Register with management client if we need to. */
165 CDEBUG(D_HA, "%s registering with %s for events about %s\n",
166 obddev->obd_name, mgmt_name, server_uuid.uuid);
168 mgmt_obd = class_name2obd(mgmt_name);
170 CERROR("can't find mgmtcli %s to register\n",
172 GOTO(err_import, rc = -ENOSYS);
175 register_f = inter_module_get("mgmtcli_register_for_events");
177 CERROR("can't i_m_g mgmtcli_register_for_events\n");
178 GOTO(err_import, rc = -ENOSYS);
181 rc = register_f(mgmt_obd, obddev, &imp->imp_target_uuid);
182 inter_module_put("mgmtcli_register_for_events");
185 cli->cl_mgmtcli_obd = mgmt_obd;
191 class_destroy_import(imp);
199 int client_obd_cleanup(struct obd_device *obddev, int flags)
201 struct client_obd *cli = &obddev->u.cli;
205 if (cli->cl_mgmtcli_obd) {
206 mgmtcli_deregister_for_events_t dereg_f;
208 dereg_f = inter_module_get("mgmtcli_deregister_for_events");
209 dereg_f(cli->cl_mgmtcli_obd, obddev);
210 inter_module_put("mgmtcli_deregister_for_events");
212 class_destroy_import(cli->cl_import);
213 cli->cl_import = NULL;
215 ldlm_put_ref(flags & OBD_OPT_FORCE);
220 int client_connect_import(struct lustre_handle *dlm_handle,
221 struct obd_device *obd,
222 struct obd_uuid *cluuid)
224 struct client_obd *cli = &obd->u.cli;
225 struct obd_import *imp = cli->cl_import;
226 struct obd_export *exp;
231 rc = class_connect(dlm_handle, obd, cluuid);
235 cli->cl_conn_count++;
236 if (cli->cl_conn_count > 1)
238 exp = class_conn2export(dlm_handle);
240 if (obd->obd_namespace != NULL)
241 CERROR("already have namespace!\n");
242 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
243 LDLM_NAMESPACE_CLIENT);
244 if (obd->obd_namespace == NULL)
245 GOTO(out_disco, rc = -ENOMEM);
247 imp->imp_dlm_handle = *dlm_handle;
248 imp->imp_state = LUSTRE_IMP_DISCON;
250 rc = ptlrpc_connect_import(imp);
252 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
256 LASSERT (imp->imp_state == LUSTRE_IMP_FULL);
258 exp->exp_connection = ptlrpc_connection_addref(imp->imp_connection);
260 if (imp->imp_replayable) {
261 CDEBUG(D_HA, "connected to replayable target: %s\n",
262 imp->imp_target_uuid.uuid);
263 ptlrpc_pinger_add_import(imp);
266 CDEBUG(D_HA, "local import: %p, remote handle: "LPX64"\n", imp,
267 imp->imp_remote_handle.cookie);
273 ldlm_namespace_free(obd->obd_namespace, 0);
274 obd->obd_namespace = NULL;
276 cli->cl_conn_count--;
277 class_disconnect(exp, 0);
279 class_export_put(exp);
286 int client_disconnect_export(struct obd_export *exp, int failover)
288 struct obd_device *obd = class_exp2obd(exp);
289 struct client_obd *cli = &obd->u.cli;
290 struct obd_import *imp = cli->cl_import;
295 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
296 exp, exp ? exp->exp_handle.h_cookie : -1);
301 if (!cli->cl_conn_count) {
302 CERROR("disconnecting disconnected device (%s)\n",
304 GOTO(out_sem, rc = -EINVAL);
307 cli->cl_conn_count--;
308 if (cli->cl_conn_count)
309 GOTO(out_no_disconnect, rc = 0);
311 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
312 * delete it regardless. (It's safe to delete an import that was
314 (void)ptlrpc_pinger_del_import(imp);
316 if (obd->obd_namespace != NULL) {
317 /* obd_no_recov == local only */
318 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
319 obd->obd_no_recov, NULL);
320 ldlm_namespace_free(obd->obd_namespace, obd->obd_no_recov);
321 obd->obd_namespace = NULL;
324 /* Yeah, obd_no_recov also (mainly) means "forced shutdown". */
325 if (obd->obd_no_recov)
326 ptlrpc_set_import_active(imp, 0);
328 rc = ptlrpc_disconnect_import(imp);
330 imp->imp_state = LUSTRE_IMP_NEW;
334 err = class_disconnect(exp, 0);
342 /* --------------------------------------------------------------------------
343 * from old lib/target.c
344 * -------------------------------------------------------------------------- */
346 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
347 struct obd_uuid *cluuid)
349 if (exp->exp_connection) {
350 struct lustre_handle *hdl;
351 hdl = &exp->exp_imp_reverse->imp_remote_handle;
352 /* Might be a re-connect after a partition. */
353 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
354 CERROR("%s reconnecting\n", cluuid->uuid);
355 conn->cookie = exp->exp_handle.h_cookie;
358 CERROR("%s reconnecting from %s, "
359 "handle mismatch (ours "LPX64", theirs "
360 LPX64")\n", cluuid->uuid,
361 exp->exp_connection->c_remote_uuid.uuid,
362 hdl->cookie, conn->cookie);
363 memset(conn, 0, sizeof *conn);
368 conn->cookie = exp->exp_handle.h_cookie;
369 CDEBUG(D_INFO, "existing export for UUID '%s' at %p\n",
371 CDEBUG(D_IOCTL,"connect: cookie "LPX64"\n", conn->cookie);
375 int target_handle_connect(struct ptlrpc_request *req, svc_handler_t handler)
377 struct obd_device *target;
378 struct obd_export *export = NULL;
379 struct obd_import *revimp;
380 struct lustre_handle conn;
381 struct obd_uuid tgtuuid;
382 struct obd_uuid cluuid;
383 struct obd_uuid remote_uuid;
386 int rc = 0, abort_recovery;
389 LASSERT_REQSWAB (req, 0);
390 str = lustre_msg_string(req->rq_reqmsg, 0, sizeof(tgtuuid) - 1);
392 CERROR("bad target UUID for connect\n");
393 GOTO(out, rc = -EINVAL);
396 obd_str2uuid (&tgtuuid, str);
397 target = class_uuid2obd(&tgtuuid);
399 target = class_name2obd(str);
402 if (!target || target->obd_stopping || !target->obd_set_up) {
403 CERROR("UUID '%s' is not available for connect\n", str);
404 GOTO(out, rc = -ENODEV);
407 LASSERT_REQSWAB (req, 1);
408 str = lustre_msg_string(req->rq_reqmsg, 1, sizeof(cluuid) - 1);
410 CERROR("bad client UUID for connect\n");
411 GOTO(out, rc = -EINVAL);
414 obd_str2uuid (&cluuid, str);
416 /* XXX extract a nettype and format accordingly */
417 snprintf(remote_uuid.uuid, sizeof remote_uuid,
418 "NET_"LPX64"_UUID", req->rq_peer.peer_nid);
420 spin_lock_bh(&target->obd_processing_task_lock);
421 abort_recovery = target->obd_abort_recovery;
422 spin_unlock_bh(&target->obd_processing_task_lock);
424 target_abort_recovery(target);
426 tmp = lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn);
428 GOTO(out, rc = -EPROTO);
430 memcpy(&conn, tmp, sizeof conn);
432 rc = lustre_pack_reply(req, 0, NULL, NULL);
436 /* lctl gets a backstage, all-access pass. */
437 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
438 goto dont_check_exports;
440 spin_lock(&target->obd_dev_lock);
441 list_for_each(p, &target->obd_exports) {
442 export = list_entry(p, struct obd_export, exp_obd_chain);
443 if (obd_uuid_equals(&cluuid, &export->exp_client_uuid)) {
444 spin_unlock(&target->obd_dev_lock);
445 LASSERT(export->exp_obd == target);
447 rc = target_handle_reconnect(&conn, export, &cluuid);
452 /* If we found an export, we already unlocked. */
454 spin_unlock(&target->obd_dev_lock);
455 } else if (req->rq_reqmsg->conn_cnt == 1) {
456 CERROR("%s reconnected with 1 conn_cnt; cookies not random?\n",
458 GOTO(out, rc = -EALREADY);
461 /* Tell the client if we're in recovery. */
462 /* If this is the first client, start the recovery timer */
463 if (target->obd_recovering) {
464 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
465 target_start_recovery_timer(target, handler);
468 /* Tell the client if we support replayable requests */
469 if (target->obd_replayable)
470 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
472 if (export == NULL) {
473 if (target->obd_recovering) {
474 CERROR("denying connection for new client %s: "
475 "%d clients in recovery for %lds\n", cluuid.uuid,
476 target->obd_recoverable_clients,
477 (target->obd_recovery_timer.expires-jiffies)/HZ);
481 rc = obd_connect(&conn, target, &cluuid);
485 /* If all else goes well, this is our RPC return code. */
488 if (rc && rc != EALREADY)
491 /* XXX track this all the time? */
492 if (target->obd_recovering) {
493 target->obd_connected_clients++;
496 req->rq_repmsg->handle = conn;
498 /* If the client and the server are the same node, we will already
499 * have an export that really points to the client's DLM export,
500 * because we have a shared handles table.
502 * XXX this will go away when shaver stops sending the "connect" handle
503 * in the real "remote handle" field of the request --phik 24 Apr 2003
505 if (req->rq_export != NULL)
506 class_export_put(req->rq_export);
508 /* ownership of this export ref transfers to the request */
509 export = req->rq_export = class_conn2export(&conn);
510 LASSERT(export != NULL);
512 if (req->rq_connection != NULL)
513 ptlrpc_put_connection(req->rq_connection);
514 if (export->exp_connection != NULL)
515 ptlrpc_put_connection(export->exp_connection);
516 export->exp_connection = ptlrpc_get_connection(&req->rq_peer,
518 req->rq_connection = ptlrpc_connection_addref(export->exp_connection);
520 LASSERT(export->exp_conn_cnt < req->rq_reqmsg->conn_cnt);
521 export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
523 if (rc == EALREADY) {
524 /* We indicate the reconnection in a flag, not an error code. */
525 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
529 memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn),
532 if (export->exp_imp_reverse != NULL)
533 class_destroy_import(export->exp_imp_reverse);
534 revimp = export->exp_imp_reverse = class_new_import();
535 revimp->imp_connection = ptlrpc_connection_addref(req->rq_connection);
536 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
537 revimp->imp_remote_handle = conn;
538 revimp->imp_obd = target;
539 revimp->imp_dlm_fake = 1;
540 revimp->imp_state = LUSTRE_IMP_FULL;
541 class_import_put(revimp);
548 int target_handle_disconnect(struct ptlrpc_request *req)
553 rc = lustre_pack_reply(req, 0, NULL, NULL);
557 req->rq_status = obd_disconnect(req->rq_export, 0);
558 req->rq_export = NULL;
562 void target_destroy_export(struct obd_export *exp)
564 /* exports created from last_rcvd data, and "fake"
565 exports created by lctl don't have an import */
566 if (exp->exp_imp_reverse != NULL)
567 class_destroy_import(exp->exp_imp_reverse);
569 /* We cancel locks at disconnect time, but this will catch any locks
570 * granted in a race with recovery-induced disconnect. */
571 ldlm_cancel_locks_for_export(exp);
578 void target_cancel_recovery_timer(struct obd_device *obd)
580 del_timer(&obd->obd_recovery_timer);
583 static void abort_delayed_replies(struct obd_device *obd)
585 struct ptlrpc_request *req;
586 struct list_head *tmp, *n;
587 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
588 req = list_entry(tmp, struct ptlrpc_request, rq_list);
589 DEBUG_REQ(D_ERROR, req, "aborted:");
590 req->rq_status = -ENOTCONN;
591 req->rq_type = PTL_RPC_MSG_ERR;
593 list_del(&req->rq_list);
594 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
595 OBD_FREE(req, sizeof *req);
599 static void abort_recovery_queue(struct obd_device *obd)
601 struct ptlrpc_request *req;
602 struct list_head *tmp, *n;
605 list_for_each_safe(tmp, n, &obd->obd_recovery_queue) {
606 req = list_entry(tmp, struct ptlrpc_request, rq_list);
607 DEBUG_REQ(D_ERROR, req, "aborted:");
608 req->rq_status = -ENOTCONN;
609 req->rq_type = PTL_RPC_MSG_ERR;
610 rc = lustre_pack_reply(req, 0, NULL, NULL);
614 DEBUG_REQ(D_ERROR, req,
615 "packing failed for abort-reply; skipping");
617 list_del(&req->rq_list);
618 class_export_put(req->rq_export);
619 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
620 OBD_FREE(req, sizeof *req);
624 void target_abort_recovery(void *data)
626 struct obd_device *obd = data;
629 CERROR("disconnecting clients and aborting recovery\n");
630 spin_lock_bh(&obd->obd_processing_task_lock);
631 if (!obd->obd_recovering) {
632 spin_unlock_bh(&obd->obd_processing_task_lock);
637 obd->obd_recovering = obd->obd_abort_recovery = 0;
639 wake_up(&obd->obd_next_transno_waitq);
640 target_cancel_recovery_timer(obd);
641 spin_unlock_bh(&obd->obd_processing_task_lock);
643 class_disconnect_exports(obd, 0);
645 /* when recovery was abort, cleanup orphans for mds */
646 if (OBT(obd) && OBP(obd, postrecov)) {
647 rc = OBP(obd, postrecov)(obd);
649 CWARN("Cleanup %d orphans after recovery was aborted\n", rc);
651 CERROR("postrecov failed %d\n", rc);
654 abort_delayed_replies(obd);
655 abort_recovery_queue(obd);
656 ptlrpc_run_recovery_over_upcall(obd);
659 static void target_recovery_expired(unsigned long castmeharder)
661 struct obd_device *obd = (struct obd_device *)castmeharder;
662 CERROR("recovery timed out, aborting\n");
663 spin_lock_bh(&obd->obd_processing_task_lock);
664 obd->obd_abort_recovery = 1;
665 wake_up(&obd->obd_next_transno_waitq);
666 spin_unlock_bh(&obd->obd_processing_task_lock);
669 static void reset_recovery_timer(struct obd_device *obd)
672 spin_lock(&obd->obd_dev_lock);
673 recovering = obd->obd_recovering;
674 spin_unlock(&obd->obd_dev_lock);
678 CDEBUG(D_HA, "timer will expire in %u seconds\n",
679 OBD_RECOVERY_TIMEOUT / HZ);
680 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
684 /* Only start it the first time called */
685 void target_start_recovery_timer(struct obd_device *obd, svc_handler_t handler)
687 spin_lock_bh(&obd->obd_processing_task_lock);
688 if (obd->obd_recovery_handler) {
689 spin_unlock_bh(&obd->obd_processing_task_lock);
692 CWARN("%s: starting recovery timer (%us)\n", obd->obd_name,
693 OBD_RECOVERY_TIMEOUT / HZ);
694 obd->obd_recovery_handler = handler;
695 obd->obd_recovery_timer.function = target_recovery_expired;
696 obd->obd_recovery_timer.data = (unsigned long)obd;
697 init_timer(&obd->obd_recovery_timer);
698 spin_unlock_bh(&obd->obd_processing_task_lock);
700 reset_recovery_timer(obd);
703 static int check_for_next_transno(struct obd_device *obd)
705 struct ptlrpc_request *req;
706 int wake_up = 0, connected, completed, queue_len, max;
707 __u64 next_transno, req_transno;
709 spin_lock_bh(&obd->obd_processing_task_lock);
710 req = list_entry(obd->obd_recovery_queue.next,
711 struct ptlrpc_request, rq_list);
712 max = obd->obd_max_recoverable_clients;
713 req_transno = req->rq_reqmsg->transno;
714 connected = obd->obd_connected_clients;
715 completed = max - obd->obd_recoverable_clients;
716 queue_len = obd->obd_requests_queued_for_recovery;
717 next_transno = obd->obd_next_recovery_transno;
719 if (obd->obd_abort_recovery) {
720 CDEBUG(D_HA, "waking for aborted recovery\n");
722 } else if (!obd->obd_recovering) {
723 CDEBUG(D_HA, "waking for completed recovery (?)\n");
725 } else if (req_transno == next_transno) {
726 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
728 } else if (queue_len + completed == max) {
730 "waking for skipped transno (skip: "LPD64
731 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
732 next_transno, queue_len, completed, max, req_transno);
733 obd->obd_next_recovery_transno = req_transno;
736 spin_unlock_bh(&obd->obd_processing_task_lock);
737 LASSERT(req->rq_reqmsg->transno >= next_transno);
741 static void process_recovery_queue(struct obd_device *obd)
743 struct ptlrpc_request *req;
744 int abort_recovery = 0;
745 struct l_wait_info lwi = { 0 };
749 spin_lock_bh(&obd->obd_processing_task_lock);
750 LASSERT(obd->obd_processing_task == current->pid);
751 req = list_entry(obd->obd_recovery_queue.next,
752 struct ptlrpc_request, rq_list);
754 if (req->rq_reqmsg->transno != obd->obd_next_recovery_transno) {
755 spin_unlock_bh(&obd->obd_processing_task_lock);
756 CDEBUG(D_HA, "Waiting for transno "LPD64" (1st is "
758 obd->obd_next_recovery_transno,
759 req->rq_reqmsg->transno);
760 l_wait_event(obd->obd_next_transno_waitq,
761 check_for_next_transno(obd), &lwi);
762 spin_lock_bh(&obd->obd_processing_task_lock);
763 abort_recovery = obd->obd_abort_recovery;
764 spin_unlock_bh(&obd->obd_processing_task_lock);
765 if (abort_recovery) {
766 target_abort_recovery(obd);
771 list_del_init(&req->rq_list);
772 obd->obd_requests_queued_for_recovery--;
773 spin_unlock_bh(&obd->obd_processing_task_lock);
775 DEBUG_REQ(D_HA, req, "processing: ");
776 (void)obd->obd_recovery_handler(req);
777 obd->obd_replayed_requests++;
778 reset_recovery_timer(obd);
779 /* bug 1580: decide how to properly sync() in recovery */
780 //mds_fsync_super(mds->mds_sb);
781 class_export_put(req->rq_export);
782 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
783 OBD_FREE(req, sizeof *req);
784 spin_lock_bh(&obd->obd_processing_task_lock);
785 obd->obd_next_recovery_transno++;
786 if (list_empty(&obd->obd_recovery_queue)) {
787 obd->obd_processing_task = 0;
788 spin_unlock_bh(&obd->obd_processing_task_lock);
791 spin_unlock_bh(&obd->obd_processing_task_lock);
796 int target_queue_recovery_request(struct ptlrpc_request *req,
797 struct obd_device *obd)
799 struct list_head *tmp;
801 __u64 transno = req->rq_reqmsg->transno;
802 struct ptlrpc_request *saved_req;
803 struct lustre_msg *reqmsg;
805 /* CAVEAT EMPTOR: The incoming request message has been swabbed
806 * (i.e. buflens etc are in my own byte order), but type-dependent
807 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
810 INIT_LIST_HEAD(&req->rq_list);
811 DEBUG_REQ(D_HA, req, "not queueing");
815 /* XXX If I were a real man, these LBUGs would be sane cleanups. */
816 /* XXX just like the request-dup code in queue_final_reply */
817 OBD_ALLOC(saved_req, sizeof *saved_req);
820 OBD_ALLOC(reqmsg, req->rq_reqlen);
824 spin_lock_bh(&obd->obd_processing_task_lock);
826 /* If we're processing the queue, we want don't want to queue this
829 * Also, if this request has a transno less than the one we're waiting
830 * for, we should process it now. It could (and currently always will)
831 * be an open request for a descriptor that was opened some time ago.
833 if (obd->obd_processing_task == current->pid ||
834 transno < obd->obd_next_recovery_transno) {
835 /* Processing the queue right now, don't re-add. */
836 LASSERT(list_empty(&req->rq_list));
837 spin_unlock_bh(&obd->obd_processing_task_lock);
838 OBD_FREE(reqmsg, req->rq_reqlen);
839 OBD_FREE(saved_req, sizeof *saved_req);
843 memcpy(saved_req, req, sizeof *req);
844 memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
846 req->rq_reqmsg = reqmsg;
847 class_export_get(req->rq_export);
848 INIT_LIST_HEAD(&req->rq_list);
851 list_for_each(tmp, &obd->obd_recovery_queue) {
852 struct ptlrpc_request *reqiter =
853 list_entry(tmp, struct ptlrpc_request, rq_list);
855 if (reqiter->rq_reqmsg->transno > transno) {
856 list_add_tail(&req->rq_list, &reqiter->rq_list);
863 list_add_tail(&req->rq_list, &obd->obd_recovery_queue);
866 obd->obd_requests_queued_for_recovery++;
868 if (obd->obd_processing_task != 0) {
869 /* Someone else is processing this queue, we'll leave it to
872 wake_up(&obd->obd_next_transno_waitq);
873 spin_unlock_bh(&obd->obd_processing_task_lock);
877 /* Nobody is processing, and we know there's (at least) one to process
878 * now, so we'll do the honours.
880 obd->obd_processing_task = current->pid;
881 spin_unlock_bh(&obd->obd_processing_task_lock);
883 process_recovery_queue(obd);
887 struct obd_device * target_req2obd(struct ptlrpc_request *req)
889 return req->rq_export->exp_obd;
892 int target_queue_final_reply(struct ptlrpc_request *req, int rc)
894 struct obd_device *obd = target_req2obd(req);
895 struct ptlrpc_request *saved_req;
896 struct lustre_msg *reqmsg;
897 int recovery_done = 0;
901 /* Just like ptlrpc_error, but without the sending. */
902 rc = lustre_pack_reply(req, 0, NULL, NULL);
903 LASSERT(rc == 0); /* XXX handle this */
904 req->rq_type = PTL_RPC_MSG_ERR;
907 LASSERT(list_empty(&req->rq_list));
908 /* XXX a bit like the request-dup code in queue_recovery_request */
909 OBD_ALLOC(saved_req, sizeof *saved_req);
912 OBD_ALLOC(reqmsg, req->rq_reqlen);
915 memcpy(saved_req, req, sizeof *saved_req);
916 memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
918 req->rq_reqmsg = reqmsg;
919 list_add(&req->rq_list, &obd->obd_delayed_reply_queue);
921 spin_lock_bh(&obd->obd_processing_task_lock);
922 --obd->obd_recoverable_clients;
923 recovery_done = (obd->obd_recoverable_clients == 0);
924 spin_unlock_bh(&obd->obd_processing_task_lock);
927 struct list_head *tmp, *n;
928 ldlm_reprocess_all_ns(req->rq_export->exp_obd->obd_namespace);
929 CWARN("%s: all clients recovered, sending delayed replies\n",
931 obd->obd_recovering = 0;
933 /* when recovering finished, cleanup orphans for mds */
934 if (OBT(obd) && OBP(obd, postrecov)) {
935 rc2 = OBP(obd, postrecov)(obd);
937 CWARN("%s: all clients recovered, %d MDS orphans "
938 "deleted\n", obd->obd_name, rc2);
940 CERROR("postrecov failed %d\n", rc2);
943 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
944 req = list_entry(tmp, struct ptlrpc_request, rq_list);
945 DEBUG_REQ(D_ERROR, req, "delayed:");
947 list_del(&req->rq_list);
948 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
949 OBD_FREE(req, sizeof *req);
951 target_cancel_recovery_timer(obd);
953 CWARN("%s: %d recoverable clients remain\n",
954 obd->obd_name, obd->obd_recoverable_clients);
955 wake_up(&obd->obd_next_transno_waitq);
961 static void ptlrpc_abort_reply (struct ptlrpc_request *req)
963 /* On return, we must be sure that the ACK callback has either
964 * happened or will not happen. Note that the SENT callback will
965 * happen come what may since we successfully posted the PUT. */
967 struct l_wait_info lwi;
971 /* serialise with ACK callback */
972 spin_lock_irqsave (&req->rq_lock, flags);
973 if (!req->rq_want_ack) {
974 spin_unlock_irqrestore (&req->rq_lock, flags);
975 /* The ACK callback has happened already. Although the
976 * SENT callback might still be outstanding (yes really) we
977 * don't care; this is just like normal completion. */
980 spin_unlock_irqrestore (&req->rq_lock, flags);
982 /* Have a bash at unlinking the MD. This will fail until the SENT
983 * callback has happened since the MD is busy from the PUT. If the
984 * ACK still hasn't arrived after then, a successful unlink will
985 * ensure the ACK callback never happens. */
986 rc = PtlMDUnlink (req->rq_reply_md_h);
991 /* SENT callback happened; ACK callback preempted */
992 LASSERT (req->rq_want_ack);
993 spin_lock_irqsave (&req->rq_lock, flags);
994 req->rq_want_ack = 0;
995 spin_unlock_irqrestore (&req->rq_lock, flags);
1000 /* Still sending or ACK callback in progress: wait until
1001 * either callback has completed and try again.
1002 * Actually we can't wait for the SENT callback because
1003 * there's no state the SENT callback can touch that will
1004 * allow it to communicate with us! So we just wait here
1005 * for a short time, effectively polling for the SENT
1006 * callback by calling PtlMDUnlink() again, to see if it
1007 * has finished. Note that if the ACK does arrive, its
1008 * callback wakes us in short order. --eeb */
1009 lwi = LWI_TIMEOUT (HZ/4, NULL, NULL);
1010 rc = l_wait_event(req->rq_reply_waitq, !req->rq_want_ack,
1012 CDEBUG (D_HA, "Retrying req %p: %d\n", req, rc);
1013 /* NB go back and test rq_want_ack with locking, to ensure
1014 * if ACK callback happened, it has completed stopped
1015 * referencing this req. */
1020 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
1024 unsigned long flags;
1025 struct ptlrpc_req_ack_lock *ack_lock;
1026 struct l_wait_info lwi = { 0 };
1027 wait_queue_t commit_wait;
1028 struct obd_device *obd =
1029 req->rq_export ? req->rq_export->exp_obd : NULL;
1030 struct obd_export *exp = NULL;
1032 if (req->rq_export) {
1033 for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
1034 if (req->rq_ack_locks[i].mode) {
1035 exp = req->rq_export;
1042 exp->exp_outstanding_reply = req;
1043 spin_lock_irqsave (&req->rq_lock, flags);
1044 req->rq_want_ack = 1;
1045 spin_unlock_irqrestore (&req->rq_lock, flags);
1048 if (!OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
1050 DEBUG_REQ(D_NET, req, "sending reply");
1051 netrc = ptlrpc_reply(req);
1052 } else if (rc == -ENOTCONN) {
1053 DEBUG_REQ(D_HA, req, "processing error (%d)", rc);
1054 netrc = ptlrpc_error(req);
1056 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
1057 netrc = ptlrpc_error(req);
1060 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
1061 DEBUG_REQ(D_ERROR, req, "dropping reply");
1062 if (req->rq_repmsg) {
1063 OBD_FREE(req->rq_repmsg, req->rq_replen);
1064 req->rq_repmsg = NULL;
1066 init_waitqueue_head(&req->rq_reply_waitq);
1070 /* a failed send simulates the callbacks */
1071 LASSERT(netrc == 0 || req->rq_want_ack == 0);
1073 LASSERT(req->rq_want_ack == 0);
1076 LASSERT(obd != NULL);
1078 init_waitqueue_entry(&commit_wait, current);
1079 add_wait_queue(&obd->obd_commit_waitq, &commit_wait);
1080 rc = l_wait_event(req->rq_reply_waitq,
1081 !req->rq_want_ack || req->rq_resent ||
1082 req->rq_transno <= obd->obd_last_committed, &lwi);
1083 remove_wait_queue(&obd->obd_commit_waitq, &commit_wait);
1085 spin_lock_irqsave (&req->rq_lock, flags);
1086 /* If we got here because the ACK callback ran, this acts as a
1087 * barrier to ensure the callback completed the wakeup. */
1088 spin_unlock_irqrestore (&req->rq_lock, flags);
1090 /* If we committed the transno already, then we might wake up before
1091 * the ack arrives. We need to stop waiting for the ack before we can
1092 * reuse this request structure. We are guaranteed by this point that
1093 * this cannot abort the sending of the actual reply.*/
1094 ptlrpc_abort_reply(req);
1096 if (req->rq_resent) {
1097 DEBUG_REQ(D_HA, req, "resent: not cancelling locks");
1102 DEBUG_REQ(D_HA, req, "cancelling locks for %s",
1103 req->rq_want_ack ? "commit" : "ack");
1105 exp->exp_outstanding_reply = NULL;
1107 for (ack_lock = req->rq_ack_locks, i = 0;
1108 i < REQ_MAX_ACK_LOCKS; i++, ack_lock++) {
1109 if (!ack_lock->mode)
1111 ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
1115 int target_handle_ping(struct ptlrpc_request *req)
1117 return lustre_pack_reply(req, 0, NULL, NULL);
1120 void *ldlm_put_lock_into_req(struct ptlrpc_request *req,
1121 struct lustre_handle *lock, int mode)
1125 for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
1126 if (req->rq_ack_locks[i].mode)
1128 memcpy(&req->rq_ack_locks[i].lock, lock, sizeof(*lock));
1129 req->rq_ack_locks[i].mode = mode;
1130 return &req->rq_ack_locks[i];
1132 CERROR("no space for lock in struct ptlrpc_request\n");