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)));
100 cli->cl_dirty_granted = 0;
101 cli->cl_dirty_max = 64*1024*1024; /* some default */
102 cli->cl_ost_can_grant = 1;
103 INIT_LIST_HEAD(&cli->cl_cache_waiters);
104 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
105 spin_lock_init(&cli->cl_loi_list_lock);
106 cli->cl_brw_in_flight = 0;
107 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
108 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
109 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
110 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
111 cli->cl_max_pages_per_rpc = PTL_MD_MAX_PAGES;
112 cli->cl_max_rpcs_in_flight = 8;
116 CERROR("ldlm_get_ref failed: %d\n", rc);
120 conn = ptlrpc_uuid_to_connection(&server_uuid);
122 GOTO(err_ldlm, rc = -ENOENT);
124 ptlrpc_init_client(rq_portal, rp_portal, name,
125 &obddev->obd_ldlm_client);
127 imp = class_new_import();
129 ptlrpc_put_connection(conn);
130 GOTO(err_ldlm, rc = -ENOENT);
132 imp->imp_connection = conn;
133 imp->imp_client = &obddev->obd_ldlm_client;
134 imp->imp_obd = obddev;
135 imp->imp_connect_op = connect_op;
136 imp->imp_generation = 0;
137 INIT_LIST_HEAD(&imp->imp_pinger_chain);
138 memcpy(imp->imp_target_uuid.uuid, lcfg->lcfg_inlbuf1,
140 class_import_put(imp);
142 cli->cl_import = imp;
143 cli->cl_max_mds_easize = sizeof(struct lov_mds_md);
144 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
145 cli->cl_sandev = to_kdev_t(0);
147 if (lcfg->lcfg_inllen3 != 0) {
148 if (!strcmp(lcfg->lcfg_inlbuf3, "inactive")) {
149 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
150 name, obddev->obd_name,
151 imp->imp_target_uuid.uuid);
152 imp->imp_invalid = 1;
154 if (lcfg->lcfg_inllen4 != 0)
155 mgmt_name = lcfg->lcfg_inlbuf4;
157 mgmt_name = lcfg->lcfg_inlbuf3;
161 if (mgmt_name != NULL) {
162 /* Register with management client if we need to. */
163 CDEBUG(D_HA, "%s registering with %s for events about %s\n",
164 obddev->obd_name, mgmt_name, server_uuid.uuid);
166 mgmt_obd = class_name2obd(mgmt_name);
168 CERROR("can't find mgmtcli %s to register\n",
170 GOTO(err_import, rc = -ENOSYS);
173 register_f = inter_module_get("mgmtcli_register_for_events");
175 CERROR("can't i_m_g mgmtcli_register_for_events\n");
176 GOTO(err_import, rc = -ENOSYS);
179 rc = register_f(mgmt_obd, obddev, &imp->imp_target_uuid);
180 inter_module_put("mgmtcli_register_for_events");
183 cli->cl_mgmtcli_obd = mgmt_obd;
189 class_destroy_import(imp);
197 int client_obd_cleanup(struct obd_device *obddev, int flags)
199 struct client_obd *cli = &obddev->u.cli;
203 if (cli->cl_mgmtcli_obd) {
204 mgmtcli_deregister_for_events_t dereg_f;
206 dereg_f = inter_module_get("mgmtcli_deregister_for_events");
207 dereg_f(cli->cl_mgmtcli_obd, obddev);
208 inter_module_put("mgmtcli_deregister_for_events");
210 class_destroy_import(cli->cl_import);
211 cli->cl_import = NULL;
213 ldlm_put_ref(flags & OBD_OPT_FORCE);
218 int client_connect_import(struct lustre_handle *dlm_handle,
219 struct obd_device *obd,
220 struct obd_uuid *cluuid)
222 struct client_obd *cli = &obd->u.cli;
223 struct obd_import *imp = cli->cl_import;
224 struct obd_export *exp;
229 rc = class_connect(dlm_handle, obd, cluuid);
233 cli->cl_conn_count++;
234 if (cli->cl_conn_count > 1)
236 exp = class_conn2export(dlm_handle);
238 if (obd->obd_namespace != NULL)
239 CERROR("already have namespace!\n");
240 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
241 LDLM_NAMESPACE_CLIENT);
242 if (obd->obd_namespace == NULL)
243 GOTO(out_disco, rc = -ENOMEM);
245 imp->imp_dlm_handle = *dlm_handle;
246 imp->imp_state = LUSTRE_IMP_DISCON;
248 rc = ptlrpc_connect_import(imp);
250 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
254 LASSERT (imp->imp_state == LUSTRE_IMP_FULL);
256 exp->exp_connection = ptlrpc_connection_addref(imp->imp_connection);
258 if (imp->imp_replayable) {
259 CDEBUG(D_HA, "connected to replayable target: %s\n",
260 imp->imp_target_uuid.uuid);
261 ptlrpc_pinger_add_import(imp);
264 CDEBUG(D_HA, "local import: %p, remote handle: "LPX64"\n", imp,
265 imp->imp_remote_handle.cookie);
271 ldlm_namespace_free(obd->obd_namespace, 0);
272 obd->obd_namespace = NULL;
274 cli->cl_conn_count--;
275 class_disconnect(exp, 0);
277 class_export_put(exp);
284 int client_disconnect_export(struct obd_export *exp, int failover)
286 struct obd_device *obd = class_exp2obd(exp);
287 struct client_obd *cli = &obd->u.cli;
288 struct obd_import *imp = cli->cl_import;
293 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
294 exp, exp ? exp->exp_handle.h_cookie : -1);
299 if (!cli->cl_conn_count) {
300 CERROR("disconnecting disconnected device (%s)\n",
302 GOTO(out_sem, rc = -EINVAL);
305 cli->cl_conn_count--;
306 if (cli->cl_conn_count)
307 GOTO(out_no_disconnect, rc = 0);
309 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
310 * delete it regardless. (It's safe to delete an import that was
312 (void)ptlrpc_pinger_del_import(imp);
314 if (obd->obd_namespace != NULL) {
315 /* obd_no_recov == local only */
316 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
317 obd->obd_no_recov, NULL);
318 ldlm_namespace_free(obd->obd_namespace, obd->obd_no_recov);
319 obd->obd_namespace = NULL;
322 /* Yeah, obd_no_recov also (mainly) means "forced shutdown". */
323 if (obd->obd_no_recov)
324 ptlrpc_set_import_active(imp, 0);
326 rc = ptlrpc_disconnect_import(imp);
328 imp->imp_state = LUSTRE_IMP_NEW;
332 err = class_disconnect(exp, 0);
340 /* --------------------------------------------------------------------------
341 * from old lib/target.c
342 * -------------------------------------------------------------------------- */
344 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
345 struct obd_uuid *cluuid)
347 if (exp->exp_connection) {
348 struct lustre_handle *hdl;
349 hdl = &exp->exp_imp_reverse->imp_remote_handle;
350 /* Might be a re-connect after a partition. */
351 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
352 CERROR("%s reconnecting\n", cluuid->uuid);
353 conn->cookie = exp->exp_handle.h_cookie;
356 CERROR("%s reconnecting from %s, "
357 "handle mismatch (ours "LPX64", theirs "
358 LPX64")\n", cluuid->uuid,
359 exp->exp_connection->c_remote_uuid.uuid,
360 hdl->cookie, conn->cookie);
361 memset(conn, 0, sizeof *conn);
366 conn->cookie = exp->exp_handle.h_cookie;
367 CDEBUG(D_INFO, "existing export for UUID '%s' at %p\n",
369 CDEBUG(D_IOCTL,"connect: cookie "LPX64"\n", conn->cookie);
373 int target_handle_connect(struct ptlrpc_request *req, svc_handler_t handler)
375 struct obd_device *target;
376 struct obd_export *export = NULL;
377 struct obd_import *revimp;
378 struct lustre_handle conn;
379 struct obd_uuid tgtuuid;
380 struct obd_uuid cluuid;
381 struct obd_uuid remote_uuid;
384 int rc = 0, abort_recovery;
387 LASSERT_REQSWAB (req, 0);
388 str = lustre_msg_string(req->rq_reqmsg, 0, sizeof(tgtuuid) - 1);
390 CERROR("bad target UUID for connect\n");
391 GOTO(out, rc = -EINVAL);
394 obd_str2uuid (&tgtuuid, str);
395 target = class_uuid2obd(&tgtuuid);
397 target = class_name2obd(str);
400 if (!target || target->obd_stopping || !target->obd_set_up) {
401 CERROR("UUID '%s' is not available for connect\n", str);
402 GOTO(out, rc = -ENODEV);
405 LASSERT_REQSWAB (req, 1);
406 str = lustre_msg_string(req->rq_reqmsg, 1, sizeof(cluuid) - 1);
408 CERROR("bad client UUID for connect\n");
409 GOTO(out, rc = -EINVAL);
412 obd_str2uuid (&cluuid, str);
414 /* XXX extract a nettype and format accordingly */
415 snprintf(remote_uuid.uuid, sizeof remote_uuid,
416 "NET_"LPX64"_UUID", req->rq_peer.peer_nid);
418 spin_lock_bh(&target->obd_processing_task_lock);
419 abort_recovery = target->obd_abort_recovery;
420 spin_unlock_bh(&target->obd_processing_task_lock);
422 target_abort_recovery(target);
424 tmp = lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn);
426 GOTO(out, rc = -EPROTO);
428 memcpy(&conn, tmp, sizeof conn);
430 rc = lustre_pack_reply(req, 0, NULL, NULL);
434 /* lctl gets a backstage, all-access pass. */
435 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
436 goto dont_check_exports;
438 spin_lock(&target->obd_dev_lock);
439 list_for_each(p, &target->obd_exports) {
440 export = list_entry(p, struct obd_export, exp_obd_chain);
441 if (obd_uuid_equals(&cluuid, &export->exp_client_uuid)) {
442 spin_unlock(&target->obd_dev_lock);
443 LASSERT(export->exp_obd == target);
445 rc = target_handle_reconnect(&conn, export, &cluuid);
450 /* If we found an export, we already unlocked. */
452 spin_unlock(&target->obd_dev_lock);
453 } else if (req->rq_reqmsg->conn_cnt == 1) {
454 CERROR("%s reconnected with 1 conn_cnt; cookies not random?\n",
456 GOTO(out, rc = -EALREADY);
459 /* Tell the client if we're in recovery. */
460 /* If this is the first client, start the recovery timer */
461 if (target->obd_recovering) {
462 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
463 target_start_recovery_timer(target, handler);
466 /* Tell the client if we support replayable requests */
467 if (target->obd_replayable)
468 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
470 if (export == NULL) {
471 if (target->obd_recovering) {
472 CERROR("denying connection for new client %s: "
473 "%d clients in recovery for %lds\n", cluuid.uuid,
474 target->obd_recoverable_clients,
475 (target->obd_recovery_timer.expires-jiffies)/HZ);
479 rc = obd_connect(&conn, target, &cluuid);
483 /* If all else goes well, this is our RPC return code. */
486 if (rc && rc != EALREADY)
489 /* XXX track this all the time? */
490 if (target->obd_recovering) {
491 target->obd_connected_clients++;
494 req->rq_repmsg->handle = conn;
496 /* If the client and the server are the same node, we will already
497 * have an export that really points to the client's DLM export,
498 * because we have a shared handles table.
500 * XXX this will go away when shaver stops sending the "connect" handle
501 * in the real "remote handle" field of the request --phik 24 Apr 2003
503 if (req->rq_export != NULL)
504 class_export_put(req->rq_export);
506 /* ownership of this export ref transfers to the request */
507 export = req->rq_export = class_conn2export(&conn);
508 LASSERT(export != NULL);
510 if (req->rq_connection != NULL)
511 ptlrpc_put_connection(req->rq_connection);
512 if (export->exp_connection != NULL)
513 ptlrpc_put_connection(export->exp_connection);
514 export->exp_connection = ptlrpc_get_connection(&req->rq_peer,
516 req->rq_connection = ptlrpc_connection_addref(export->exp_connection);
518 LASSERT(export->exp_conn_cnt < req->rq_reqmsg->conn_cnt);
519 export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
521 if (rc == EALREADY) {
522 /* We indicate the reconnection in a flag, not an error code. */
523 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
527 memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn),
530 if (export->exp_imp_reverse != NULL)
531 class_destroy_import(export->exp_imp_reverse);
532 revimp = export->exp_imp_reverse = class_new_import();
533 revimp->imp_connection = ptlrpc_connection_addref(req->rq_connection);
534 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
535 revimp->imp_remote_handle = conn;
536 revimp->imp_obd = target;
537 revimp->imp_dlm_fake = 1;
538 revimp->imp_state = LUSTRE_IMP_FULL;
539 class_import_put(revimp);
546 int target_handle_disconnect(struct ptlrpc_request *req)
551 rc = lustre_pack_reply(req, 0, NULL, NULL);
555 req->rq_status = obd_disconnect(req->rq_export, 0);
556 req->rq_export = NULL;
560 void target_destroy_export(struct obd_export *exp)
562 /* exports created from last_rcvd data, and "fake"
563 exports created by lctl don't have an import */
564 if (exp->exp_imp_reverse != NULL)
565 class_destroy_import(exp->exp_imp_reverse);
567 /* We cancel locks at disconnect time, but this will catch any locks
568 * granted in a race with recovery-induced disconnect. */
569 ldlm_cancel_locks_for_export(exp);
576 void target_cancel_recovery_timer(struct obd_device *obd)
578 del_timer(&obd->obd_recovery_timer);
581 static void abort_delayed_replies(struct obd_device *obd)
583 struct ptlrpc_request *req;
584 struct list_head *tmp, *n;
585 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
586 req = list_entry(tmp, struct ptlrpc_request, rq_list);
587 DEBUG_REQ(D_ERROR, req, "aborted:");
588 req->rq_status = -ENOTCONN;
589 req->rq_type = PTL_RPC_MSG_ERR;
591 list_del(&req->rq_list);
592 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
593 OBD_FREE(req, sizeof *req);
597 static void abort_recovery_queue(struct obd_device *obd)
599 struct ptlrpc_request *req;
600 struct list_head *tmp, *n;
603 list_for_each_safe(tmp, n, &obd->obd_recovery_queue) {
604 req = list_entry(tmp, struct ptlrpc_request, rq_list);
605 DEBUG_REQ(D_ERROR, req, "aborted:");
606 req->rq_status = -ENOTCONN;
607 req->rq_type = PTL_RPC_MSG_ERR;
608 rc = lustre_pack_reply(req, 0, NULL, NULL);
612 DEBUG_REQ(D_ERROR, req,
613 "packing failed for abort-reply; skipping");
615 list_del(&req->rq_list);
616 class_export_put(req->rq_export);
617 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
618 OBD_FREE(req, sizeof *req);
622 void target_abort_recovery(void *data)
624 struct obd_device *obd = data;
627 CERROR("disconnecting clients and aborting recovery\n");
628 spin_lock_bh(&obd->obd_processing_task_lock);
629 if (!obd->obd_recovering) {
630 spin_unlock_bh(&obd->obd_processing_task_lock);
635 obd->obd_recovering = obd->obd_abort_recovery = 0;
637 wake_up(&obd->obd_next_transno_waitq);
638 target_cancel_recovery_timer(obd);
639 spin_unlock_bh(&obd->obd_processing_task_lock);
641 class_disconnect_exports(obd, 0);
643 /* when recovery was abort, cleanup orphans for mds */
644 if (OBT(obd) && OBP(obd, postrecov)) {
645 rc = OBP(obd, postrecov)(obd);
647 CWARN("Cleanup %d orphans after recovery was aborted\n", rc);
649 CERROR("postrecov failed %d\n", rc);
652 abort_delayed_replies(obd);
653 abort_recovery_queue(obd);
654 ptlrpc_run_recovery_over_upcall(obd);
657 static void target_recovery_expired(unsigned long castmeharder)
659 struct obd_device *obd = (struct obd_device *)castmeharder;
660 CERROR("recovery timed out, aborting\n");
661 spin_lock_bh(&obd->obd_processing_task_lock);
662 obd->obd_abort_recovery = 1;
663 wake_up(&obd->obd_next_transno_waitq);
664 spin_unlock_bh(&obd->obd_processing_task_lock);
667 static void reset_recovery_timer(struct obd_device *obd)
670 spin_lock(&obd->obd_dev_lock);
671 recovering = obd->obd_recovering;
672 spin_unlock(&obd->obd_dev_lock);
676 CDEBUG(D_HA, "timer will expire in %u seconds\n",
677 OBD_RECOVERY_TIMEOUT / HZ);
678 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
682 /* Only start it the first time called */
683 void target_start_recovery_timer(struct obd_device *obd, svc_handler_t handler)
685 spin_lock_bh(&obd->obd_processing_task_lock);
686 if (obd->obd_recovery_handler) {
687 spin_unlock_bh(&obd->obd_processing_task_lock);
690 CWARN("%s: starting recovery timer (%us)\n", obd->obd_name,
691 OBD_RECOVERY_TIMEOUT / HZ);
692 obd->obd_recovery_handler = handler;
693 obd->obd_recovery_timer.function = target_recovery_expired;
694 obd->obd_recovery_timer.data = (unsigned long)obd;
695 init_timer(&obd->obd_recovery_timer);
696 spin_unlock_bh(&obd->obd_processing_task_lock);
698 reset_recovery_timer(obd);
701 static int check_for_next_transno(struct obd_device *obd)
703 struct ptlrpc_request *req;
704 int wake_up = 0, connected, completed, queue_len, max;
705 __u64 next_transno, req_transno;
707 spin_lock_bh(&obd->obd_processing_task_lock);
708 req = list_entry(obd->obd_recovery_queue.next,
709 struct ptlrpc_request, rq_list);
710 max = obd->obd_max_recoverable_clients;
711 req_transno = req->rq_reqmsg->transno;
712 connected = obd->obd_connected_clients;
713 completed = max - obd->obd_recoverable_clients;
714 queue_len = obd->obd_requests_queued_for_recovery;
715 next_transno = obd->obd_next_recovery_transno;
717 if (obd->obd_abort_recovery) {
718 CDEBUG(D_HA, "waking for aborted recovery\n");
720 } else if (!obd->obd_recovering) {
721 CDEBUG(D_HA, "waking for completed recovery (?)\n");
723 } else if (req_transno == next_transno) {
724 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
726 } else if (queue_len + completed == max) {
728 "waking for skipped transno (skip: "LPD64
729 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
730 next_transno, queue_len, completed, max, req_transno);
731 obd->obd_next_recovery_transno = req_transno;
734 spin_unlock_bh(&obd->obd_processing_task_lock);
735 LASSERT(req->rq_reqmsg->transno >= next_transno);
739 static void process_recovery_queue(struct obd_device *obd)
741 struct ptlrpc_request *req;
742 int abort_recovery = 0;
743 struct l_wait_info lwi = { 0 };
747 spin_lock_bh(&obd->obd_processing_task_lock);
748 LASSERT(obd->obd_processing_task == current->pid);
749 req = list_entry(obd->obd_recovery_queue.next,
750 struct ptlrpc_request, rq_list);
752 if (req->rq_reqmsg->transno != obd->obd_next_recovery_transno) {
753 spin_unlock_bh(&obd->obd_processing_task_lock);
754 CDEBUG(D_HA, "Waiting for transno "LPD64" (1st is "
756 obd->obd_next_recovery_transno,
757 req->rq_reqmsg->transno);
758 l_wait_event(obd->obd_next_transno_waitq,
759 check_for_next_transno(obd), &lwi);
760 spin_lock_bh(&obd->obd_processing_task_lock);
761 abort_recovery = obd->obd_abort_recovery;
762 spin_unlock_bh(&obd->obd_processing_task_lock);
763 if (abort_recovery) {
764 target_abort_recovery(obd);
769 list_del_init(&req->rq_list);
770 obd->obd_requests_queued_for_recovery--;
771 spin_unlock_bh(&obd->obd_processing_task_lock);
773 DEBUG_REQ(D_HA, req, "processing: ");
774 (void)obd->obd_recovery_handler(req);
775 obd->obd_replayed_requests++;
776 reset_recovery_timer(obd);
777 /* bug 1580: decide how to properly sync() in recovery */
778 //mds_fsync_super(mds->mds_sb);
779 class_export_put(req->rq_export);
780 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
781 OBD_FREE(req, sizeof *req);
782 spin_lock_bh(&obd->obd_processing_task_lock);
783 obd->obd_next_recovery_transno++;
784 if (list_empty(&obd->obd_recovery_queue)) {
785 obd->obd_processing_task = 0;
786 spin_unlock_bh(&obd->obd_processing_task_lock);
789 spin_unlock_bh(&obd->obd_processing_task_lock);
794 int target_queue_recovery_request(struct ptlrpc_request *req,
795 struct obd_device *obd)
797 struct list_head *tmp;
799 __u64 transno = req->rq_reqmsg->transno;
800 struct ptlrpc_request *saved_req;
801 struct lustre_msg *reqmsg;
803 /* CAVEAT EMPTOR: The incoming request message has been swabbed
804 * (i.e. buflens etc are in my own byte order), but type-dependent
805 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
808 INIT_LIST_HEAD(&req->rq_list);
809 DEBUG_REQ(D_HA, req, "not queueing");
813 /* XXX If I were a real man, these LBUGs would be sane cleanups. */
814 /* XXX just like the request-dup code in queue_final_reply */
815 OBD_ALLOC(saved_req, sizeof *saved_req);
818 OBD_ALLOC(reqmsg, req->rq_reqlen);
822 spin_lock_bh(&obd->obd_processing_task_lock);
824 /* If we're processing the queue, we want don't want to queue this
827 * Also, if this request has a transno less than the one we're waiting
828 * for, we should process it now. It could (and currently always will)
829 * be an open request for a descriptor that was opened some time ago.
831 if (obd->obd_processing_task == current->pid ||
832 transno < obd->obd_next_recovery_transno) {
833 /* Processing the queue right now, don't re-add. */
834 LASSERT(list_empty(&req->rq_list));
835 spin_unlock_bh(&obd->obd_processing_task_lock);
836 OBD_FREE(reqmsg, req->rq_reqlen);
837 OBD_FREE(saved_req, sizeof *saved_req);
841 memcpy(saved_req, req, sizeof *req);
842 memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
844 req->rq_reqmsg = reqmsg;
845 class_export_get(req->rq_export);
846 INIT_LIST_HEAD(&req->rq_list);
849 list_for_each(tmp, &obd->obd_recovery_queue) {
850 struct ptlrpc_request *reqiter =
851 list_entry(tmp, struct ptlrpc_request, rq_list);
853 if (reqiter->rq_reqmsg->transno > transno) {
854 list_add_tail(&req->rq_list, &reqiter->rq_list);
861 list_add_tail(&req->rq_list, &obd->obd_recovery_queue);
864 obd->obd_requests_queued_for_recovery++;
866 if (obd->obd_processing_task != 0) {
867 /* Someone else is processing this queue, we'll leave it to
870 wake_up(&obd->obd_next_transno_waitq);
871 spin_unlock_bh(&obd->obd_processing_task_lock);
875 /* Nobody is processing, and we know there's (at least) one to process
876 * now, so we'll do the honours.
878 obd->obd_processing_task = current->pid;
879 spin_unlock_bh(&obd->obd_processing_task_lock);
881 process_recovery_queue(obd);
885 struct obd_device * target_req2obd(struct ptlrpc_request *req)
887 return req->rq_export->exp_obd;
890 int target_queue_final_reply(struct ptlrpc_request *req, int rc)
892 struct obd_device *obd = target_req2obd(req);
893 struct ptlrpc_request *saved_req;
894 struct lustre_msg *reqmsg;
895 int recovery_done = 0;
899 /* Just like ptlrpc_error, but without the sending. */
900 rc = lustre_pack_reply(req, 0, NULL, NULL);
901 LASSERT(rc == 0); /* XXX handle this */
902 req->rq_type = PTL_RPC_MSG_ERR;
905 LASSERT(list_empty(&req->rq_list));
906 /* XXX a bit like the request-dup code in queue_recovery_request */
907 OBD_ALLOC(saved_req, sizeof *saved_req);
910 OBD_ALLOC(reqmsg, req->rq_reqlen);
913 memcpy(saved_req, req, sizeof *saved_req);
914 memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
916 req->rq_reqmsg = reqmsg;
917 list_add(&req->rq_list, &obd->obd_delayed_reply_queue);
919 spin_lock_bh(&obd->obd_processing_task_lock);
920 --obd->obd_recoverable_clients;
921 recovery_done = (obd->obd_recoverable_clients == 0);
922 spin_unlock_bh(&obd->obd_processing_task_lock);
925 struct list_head *tmp, *n;
926 ldlm_reprocess_all_ns(req->rq_export->exp_obd->obd_namespace);
927 CWARN("%s: all clients recovered, sending delayed replies\n",
929 obd->obd_recovering = 0;
931 /* when recovering finished, cleanup orphans for mds */
932 if (OBT(obd) && OBP(obd, postrecov)) {
933 rc2 = OBP(obd, postrecov)(obd);
935 CWARN("%s: all clients recovered, %d MDS orphans "
936 "deleted\n", obd->obd_name, rc2);
938 CERROR("postrecov failed %d\n", rc2);
941 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
942 req = list_entry(tmp, struct ptlrpc_request, rq_list);
943 DEBUG_REQ(D_ERROR, req, "delayed:");
945 list_del(&req->rq_list);
946 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
947 OBD_FREE(req, sizeof *req);
949 target_cancel_recovery_timer(obd);
951 CERROR("%s: %d recoverable clients remain\n",
952 obd->obd_name, obd->obd_recoverable_clients);
953 wake_up(&obd->obd_next_transno_waitq);
959 static void ptlrpc_abort_reply (struct ptlrpc_request *req)
961 /* On return, we must be sure that the ACK callback has either
962 * happened or will not happen. Note that the SENT callback will
963 * happen come what may since we successfully posted the PUT. */
965 struct l_wait_info lwi;
969 /* serialise with ACK callback */
970 spin_lock_irqsave (&req->rq_lock, flags);
971 if (!req->rq_want_ack) {
972 spin_unlock_irqrestore (&req->rq_lock, flags);
973 /* The ACK callback has happened already. Although the
974 * SENT callback might still be outstanding (yes really) we
975 * don't care; this is just like normal completion. */
978 spin_unlock_irqrestore (&req->rq_lock, flags);
980 /* Have a bash at unlinking the MD. This will fail until the SENT
981 * callback has happened since the MD is busy from the PUT. If the
982 * ACK still hasn't arrived after then, a successful unlink will
983 * ensure the ACK callback never happens. */
984 rc = PtlMDUnlink (req->rq_reply_md_h);
989 /* SENT callback happened; ACK callback preempted */
990 LASSERT (req->rq_want_ack);
991 spin_lock_irqsave (&req->rq_lock, flags);
992 req->rq_want_ack = 0;
993 spin_unlock_irqrestore (&req->rq_lock, flags);
998 /* Still sending or ACK callback in progress: wait until
999 * either callback has completed and try again.
1000 * Actually we can't wait for the SENT callback because
1001 * there's no state the SENT callback can touch that will
1002 * allow it to communicate with us! So we just wait here
1003 * for a short time, effectively polling for the SENT
1004 * callback by calling PtlMDUnlink() again, to see if it
1005 * has finished. Note that if the ACK does arrive, its
1006 * callback wakes us in short order. --eeb */
1007 lwi = LWI_TIMEOUT (HZ/4, NULL, NULL);
1008 rc = l_wait_event(req->rq_reply_waitq, !req->rq_want_ack,
1010 CDEBUG (D_HA, "Retrying req %p: %d\n", req, rc);
1011 /* NB go back and test rq_want_ack with locking, to ensure
1012 * if ACK callback happened, it has completed stopped
1013 * referencing this req. */
1018 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
1022 unsigned long flags;
1023 struct ptlrpc_req_ack_lock *ack_lock;
1024 struct l_wait_info lwi = { 0 };
1025 wait_queue_t commit_wait;
1026 struct obd_device *obd =
1027 req->rq_export ? req->rq_export->exp_obd : NULL;
1028 struct obd_export *exp = NULL;
1030 if (req->rq_export) {
1031 for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
1032 if (req->rq_ack_locks[i].mode) {
1033 exp = req->rq_export;
1040 exp->exp_outstanding_reply = req;
1041 spin_lock_irqsave (&req->rq_lock, flags);
1042 req->rq_want_ack = 1;
1043 spin_unlock_irqrestore (&req->rq_lock, flags);
1046 if (!OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
1048 DEBUG_REQ(D_NET, req, "sending reply");
1049 netrc = ptlrpc_reply(req);
1050 } else if (rc == -ENOTCONN) {
1051 DEBUG_REQ(D_HA, req, "processing error (%d)", rc);
1052 netrc = ptlrpc_error(req);
1054 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
1055 netrc = ptlrpc_error(req);
1058 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
1059 DEBUG_REQ(D_ERROR, req, "dropping reply");
1060 if (req->rq_repmsg) {
1061 OBD_FREE(req->rq_repmsg, req->rq_replen);
1062 req->rq_repmsg = NULL;
1064 init_waitqueue_head(&req->rq_reply_waitq);
1068 /* a failed send simulates the callbacks */
1069 LASSERT(netrc == 0 || req->rq_want_ack == 0);
1071 LASSERT(req->rq_want_ack == 0);
1074 LASSERT(obd != NULL);
1076 init_waitqueue_entry(&commit_wait, current);
1077 add_wait_queue(&obd->obd_commit_waitq, &commit_wait);
1078 rc = l_wait_event(req->rq_reply_waitq,
1079 !req->rq_want_ack || req->rq_resent ||
1080 req->rq_transno <= obd->obd_last_committed, &lwi);
1081 remove_wait_queue(&obd->obd_commit_waitq, &commit_wait);
1083 spin_lock_irqsave (&req->rq_lock, flags);
1084 /* If we got here because the ACK callback ran, this acts as a
1085 * barrier to ensure the callback completed the wakeup. */
1086 spin_unlock_irqrestore (&req->rq_lock, flags);
1088 /* If we committed the transno already, then we might wake up before
1089 * the ack arrives. We need to stop waiting for the ack before we can
1090 * reuse this request structure. We are guaranteed by this point that
1091 * this cannot abort the sending of the actual reply.*/
1092 ptlrpc_abort_reply(req);
1094 if (req->rq_resent) {
1095 DEBUG_REQ(D_HA, req, "resent: not cancelling locks");
1100 DEBUG_REQ(D_HA, req, "cancelling locks for %s",
1101 req->rq_want_ack ? "commit" : "ack");
1103 exp->exp_outstanding_reply = NULL;
1105 for (ack_lock = req->rq_ack_locks, i = 0;
1106 i < REQ_MAX_ACK_LOCKS; i++, ack_lock++) {
1107 if (!ack_lock->mode)
1109 ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
1113 int target_handle_ping(struct ptlrpc_request *req)
1115 return lustre_pack_reply(req, 0, NULL, NULL);
1118 void *ldlm_put_lock_into_req(struct ptlrpc_request *req,
1119 struct lustre_handle *lock, int mode)
1123 for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
1124 if (req->rq_ack_locks[i].mode)
1126 memcpy(&req->rq_ack_locks[i].lock, lock, sizeof(*lock));
1127 req->rq_ack_locks[i].mode = mode;
1128 return &req->rq_ack_locks[i];
1130 CERROR("no space for lock in struct ptlrpc_request\n");