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,
97 min_t(unsigned int, lcfg->lcfg_inllen2, sizeof(server_uuid)));
100 cli->cl_avail_grant = 0;
101 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
102 INIT_LIST_HEAD(&cli->cl_cache_waiters);
103 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
104 INIT_LIST_HEAD(&cli->cl_loi_write_list);
105 INIT_LIST_HEAD(&cli->cl_loi_read_list);
106 spin_lock_init(&cli->cl_loi_list_lock);
107 cli->cl_brw_in_flight = 0;
108 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
109 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
110 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
111 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
112 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
113 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
117 CERROR("ldlm_get_ref failed: %d\n", rc);
121 conn = ptlrpc_uuid_to_connection(&server_uuid);
123 GOTO(err_ldlm, rc = -ENOENT);
125 ptlrpc_init_client(rq_portal, rp_portal, name,
126 &obddev->obd_ldlm_client);
128 imp = class_new_import();
130 ptlrpc_put_connection(conn);
131 GOTO(err_ldlm, rc = -ENOENT);
133 imp->imp_connection = conn;
134 imp->imp_client = &obddev->obd_ldlm_client;
135 imp->imp_obd = obddev;
136 imp->imp_connect_op = connect_op;
137 imp->imp_generation = 0;
138 imp->imp_initial_recov = 1;
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,
223 unsigned long connect_flags)
225 struct client_obd *cli = &obd->u.cli;
226 struct obd_import *imp = cli->cl_import;
227 struct obd_export *exp;
232 rc = class_connect(dlm_handle, obd, cluuid);
236 cli->cl_conn_count++;
237 if (cli->cl_conn_count > 1)
239 exp = class_conn2export(dlm_handle);
241 if (obd->obd_namespace != NULL)
242 CERROR("already have namespace!\n");
243 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
244 LDLM_NAMESPACE_CLIENT);
245 if (obd->obd_namespace == NULL)
246 GOTO(out_disco, rc = -ENOMEM);
248 imp->imp_dlm_handle = *dlm_handle;
249 rc = ptlrpc_init_import(imp);
253 exp->exp_connection = ptlrpc_connection_addref(imp->imp_connection);
254 imp->imp_connect_flags = connect_flags;
255 rc = ptlrpc_connect_import(imp, NULL);
257 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
261 ptlrpc_pinger_add_import(imp);
266 ldlm_namespace_free(obd->obd_namespace, 0);
267 obd->obd_namespace = NULL;
269 cli->cl_conn_count--;
270 class_disconnect(exp, 0);
272 class_export_put(exp);
279 int client_disconnect_export(struct obd_export *exp, int failover)
281 struct obd_device *obd = class_exp2obd(exp);
282 struct client_obd *cli = &obd->u.cli;
283 struct obd_import *imp = cli->cl_import;
288 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
289 exp, exp ? exp->exp_handle.h_cookie : -1);
294 if (!cli->cl_conn_count) {
295 CERROR("disconnecting disconnected device (%s)\n",
297 GOTO(out_sem, rc = -EINVAL);
300 cli->cl_conn_count--;
301 if (cli->cl_conn_count)
302 GOTO(out_no_disconnect, rc = 0);
304 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
305 * delete it regardless. (It's safe to delete an import that was
307 (void)ptlrpc_pinger_del_import(imp);
309 if (obd->obd_namespace != NULL) {
310 /* obd_no_recov == local only */
311 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
312 obd->obd_no_recov, NULL);
313 ldlm_namespace_free(obd->obd_namespace, obd->obd_no_recov);
314 obd->obd_namespace = NULL;
317 /* Yeah, obd_no_recov also (mainly) means "forced shutdown". */
318 if (obd->obd_no_recov)
319 ptlrpc_invalidate_import(imp, 0);
321 rc = ptlrpc_disconnect_import(imp);
325 err = class_disconnect(exp, 0);
333 /* --------------------------------------------------------------------------
334 * from old lib/target.c
335 * -------------------------------------------------------------------------- */
337 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
338 struct obd_uuid *cluuid, int initial_conn)
340 if (exp->exp_connection && !initial_conn) {
341 struct lustre_handle *hdl;
342 hdl = &exp->exp_imp_reverse->imp_remote_handle;
343 /* Might be a re-connect after a partition. */
344 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
345 CERROR("%s reconnecting\n", cluuid->uuid);
346 conn->cookie = exp->exp_handle.h_cookie;
349 CERROR("%s reconnecting from %s, "
350 "handle mismatch (ours "LPX64", theirs "
351 LPX64")\n", cluuid->uuid,
352 exp->exp_connection->c_remote_uuid.uuid,
353 hdl->cookie, conn->cookie);
354 memset(conn, 0, sizeof *conn);
359 conn->cookie = exp->exp_handle.h_cookie;
360 CDEBUG(D_INFO, "existing export for UUID '%s' at %p\n",
362 CDEBUG(D_IOCTL,"connect: cookie "LPX64"\n", conn->cookie);
366 int target_handle_connect(struct ptlrpc_request *req)
368 unsigned long connect_flags = 0, *cfp;
369 struct obd_device *target;
370 struct obd_export *export = NULL;
371 struct obd_import *revimp;
372 struct lustre_handle conn;
373 struct obd_uuid tgtuuid;
374 struct obd_uuid cluuid;
375 struct obd_uuid remote_uuid;
380 int initial_conn = 0;
381 char peer_str[PTL_NALFMT_SIZE];
384 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
386 LASSERT_REQSWAB (req, 0);
387 str = lustre_msg_string(req->rq_reqmsg, 0, sizeof(tgtuuid) - 1);
389 CERROR("bad target UUID for connect\n");
390 GOTO(out, rc = -EINVAL);
393 obd_str2uuid (&tgtuuid, str);
394 target = class_uuid2obd(&tgtuuid);
396 target = class_name2obd(str);
399 if (!target || target->obd_stopping || !target->obd_set_up) {
400 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 switch (sizeof(ptl_nid_t)) {
416 /* NB the casts only avoid compiler warnings */
418 snprintf(remote_uuid.uuid, sizeof remote_uuid,
419 "NET_"LPX64"_UUID", (__u64)req->rq_peer.peer_nid);
422 snprintf(remote_uuid.uuid, sizeof remote_uuid,
423 "NET_%x_UUID", (__u32)req->rq_peer.peer_nid);
429 tmp = lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn);
431 GOTO(out, rc = -EPROTO);
433 memcpy(&conn, tmp, sizeof conn);
435 cfp = lustre_msg_buf(req->rq_reqmsg, 3, sizeof(unsigned long));
436 LASSERT(cfp != NULL);
437 connect_flags = *cfp;
439 rc = lustre_pack_reply(req, 0, NULL, NULL);
443 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)
446 /* lctl gets a backstage, all-access pass. */
447 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
448 goto dont_check_exports;
450 spin_lock(&target->obd_dev_lock);
451 list_for_each(p, &target->obd_exports) {
452 export = list_entry(p, struct obd_export, exp_obd_chain);
453 if (obd_uuid_equals(&cluuid, &export->exp_client_uuid)) {
454 spin_unlock(&target->obd_dev_lock);
455 LASSERT(export->exp_obd == target);
457 rc = target_handle_reconnect(&conn, export, &cluuid,
463 /* If we found an export, we already unlocked. */
465 spin_unlock(&target->obd_dev_lock);
466 } else if (req->rq_export == NULL &&
467 atomic_read(&export->exp_rpc_count) > 0) {
468 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
469 target->obd_name, cluuid.uuid,
470 ptlrpc_peernid2str(&req->rq_peer, peer_str),
471 export, atomic_read(&export->exp_refcount));
472 GOTO(out, rc = -EBUSY);
473 } else if (req->rq_export != NULL &&
474 atomic_read(&export->exp_rpc_count) > 1) {
475 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
476 target->obd_name, cluuid.uuid,
477 ptlrpc_peernid2str(&req->rq_peer, peer_str),
478 export, atomic_read(&export->exp_rpc_count));
479 GOTO(out, rc = -EBUSY);
481 else if (req->rq_reqmsg->conn_cnt == 1 && !initial_conn) {
482 CERROR("%s reconnected with 1 conn_cnt; cookies not random?\n",
484 GOTO(out, rc = -EALREADY);
487 /* Tell the client if we're in recovery. */
488 /* If this is the first client, start the recovery timer */
489 CWARN("%s: connection from %s@%s/%lu %s\n", target->obd_name, cluuid.uuid,
490 ptlrpc_peernid2str(&req->rq_peer, peer_str), *cfp,
491 target->obd_recovering ? "(recovering)" : "");
492 if (target->obd_recovering) {
493 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
494 target_start_recovery_timer(target);
497 /* Tell the client if we support replayable requests */
498 if (target->obd_replayable)
499 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
501 if (export == NULL) {
502 if (target->obd_recovering) {
503 CERROR("denying connection for new client %s@%s: "
504 "%d clients in recovery for %lds\n", cluuid.uuid,
505 ptlrpc_peernid2str(&req->rq_peer, peer_str),
506 target->obd_recoverable_clients,
507 (target->obd_recovery_timer.expires-jiffies)/HZ);
511 rc = obd_connect(&conn, target, &cluuid, connect_flags);
514 /* Tell the client if we support replayable requests */
515 if (target->obd_replayable)
516 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
518 /* If all else goes well, this is our RPC return code. */
521 if (rc && rc != EALREADY)
524 req->rq_repmsg->handle = conn;
526 /* If the client and the server are the same node, we will already
527 * have an export that really points to the client's DLM export,
528 * because we have a shared handles table.
530 * XXX this will go away when shaver stops sending the "connect" handle
531 * in the real "remote handle" field of the request --phik 24 Apr 2003
533 if (req->rq_export != NULL)
534 class_export_put(req->rq_export);
536 /* ownership of this export ref transfers to the request */
537 export = req->rq_export = class_conn2export(&conn);
538 LASSERT(export != NULL);
540 spin_lock_irqsave(&export->exp_lock, flags);
542 req->rq_repmsg->conn_cnt = export->exp_conn_cnt + 1;
543 } else if (export->exp_conn_cnt >= req->rq_reqmsg->conn_cnt) {
544 CERROR("%s@%s: already connected at a higher conn_cnt: %d > %d\n",
545 cluuid.uuid, ptlrpc_peernid2str(&req->rq_peer, peer_str),
546 export->exp_conn_cnt,
547 req->rq_reqmsg->conn_cnt);
548 spin_unlock_irqrestore(&export->exp_lock, flags);
549 GOTO(out, rc = -EALREADY);
551 export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
552 spin_unlock_irqrestore(&export->exp_lock, flags);
554 /* request from liblustre? */
555 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT)
556 export->exp_libclient = 1;
558 if (export->exp_connection != NULL)
559 ptlrpc_put_connection(export->exp_connection);
560 export->exp_connection = ptlrpc_get_connection(&req->rq_peer,
563 if (rc == EALREADY) {
564 /* We indicate the reconnection in a flag, not an error code. */
565 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
569 if (target->obd_recovering) {
570 target->obd_connected_clients++;
573 memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn),
576 if (export->exp_imp_reverse != NULL)
577 class_destroy_import(export->exp_imp_reverse);
578 revimp = export->exp_imp_reverse = class_new_import();
579 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
580 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
581 revimp->imp_remote_handle = conn;
582 revimp->imp_obd = target;
583 revimp->imp_dlm_fake = 1;
584 revimp->imp_state = LUSTRE_IMP_FULL;
585 class_import_put(revimp);
592 int target_handle_disconnect(struct ptlrpc_request *req)
594 struct obd_export *exp;
598 rc = lustre_pack_reply(req, 0, NULL, NULL);
602 /* keep the rq_export around so we can send the reply */
603 exp = class_export_get(req->rq_export);
604 req->rq_status = obd_disconnect(exp, 0);
608 void target_destroy_export(struct obd_export *exp)
610 /* exports created from last_rcvd data, and "fake"
611 exports created by lctl don't have an import */
612 if (exp->exp_imp_reverse != NULL)
613 class_destroy_import(exp->exp_imp_reverse);
615 /* We cancel locks at disconnect time, but this will catch any locks
616 * granted in a race with recovery-induced disconnect. */
617 if (exp->exp_obd->obd_namespace != NULL)
618 ldlm_cancel_locks_for_export(exp);
625 struct ptlrpc_request *
626 ptlrpc_clone_req( struct ptlrpc_request *orig_req)
628 struct ptlrpc_request *copy_req;
629 struct lustre_msg *copy_reqmsg;
631 OBD_ALLOC(copy_req, sizeof *copy_req);
634 OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
636 OBD_FREE(copy_req, sizeof *copy_req);
640 memcpy(copy_req, orig_req, sizeof *copy_req);
641 memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
642 /* the copied req takes over the reply state */
643 orig_req->rq_reply_state = NULL;
645 copy_req->rq_reqmsg = copy_reqmsg;
646 class_export_get(copy_req->rq_export);
647 INIT_LIST_HEAD(©_req->rq_list);
651 void ptlrpc_free_clone( struct ptlrpc_request *req)
653 class_export_put(req->rq_export);
654 list_del(&req->rq_list);
655 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
656 OBD_FREE(req, sizeof *req);
659 static void abort_delayed_replies(struct obd_device *obd)
661 struct ptlrpc_request *req;
662 struct list_head *tmp, *n;
663 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
664 req = list_entry(tmp, struct ptlrpc_request, rq_list);
665 DEBUG_REQ(D_ERROR, req, "aborted:");
666 req->rq_status = -ENOTCONN;
667 req->rq_type = PTL_RPC_MSG_ERR;
669 class_export_put(req->rq_export);
670 list_del(&req->rq_list);
671 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
672 OBD_FREE(req, sizeof *req);
676 static void abort_recovery_queue(struct obd_device *obd)
678 struct ptlrpc_request *req;
679 struct list_head *tmp, *n;
682 list_for_each_safe(tmp, n, &obd->obd_recovery_queue) {
683 req = list_entry(tmp, struct ptlrpc_request, rq_list);
684 DEBUG_REQ(D_ERROR, req, "aborted:");
685 req->rq_status = -ENOTCONN;
686 req->rq_type = PTL_RPC_MSG_ERR;
687 rc = lustre_pack_reply(req, 0, NULL, NULL);
691 DEBUG_REQ(D_ERROR, req,
692 "packing failed for abort-reply; skipping");
694 list_del(&req->rq_list);
695 class_export_put(req->rq_export);
696 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
697 OBD_FREE(req, sizeof *req);
701 static void target_abort_recovery(void *data)
703 struct obd_device *obd = data;
706 CERROR("disconnecting clients and aborting recovery\n");
707 LASSERT(!obd->obd_recovering);
709 class_disconnect_exports(obd, 0);
711 /* when recovery was aborted, cleanup orphans on mds and ost */
712 if (OBT(obd) && OBP(obd, postrecov)) {
713 rc = OBP(obd, postrecov)(obd);
715 CWARN("Cleanup %d orphans after recovery was aborted\n",
718 CERROR("postrecov failed %d\n", rc);
721 abort_delayed_replies(obd);
722 abort_recovery_queue(obd);
723 ptlrpc_run_recovery_over_upcall(obd);
726 static void target_recovery_expired(unsigned long castmeharder)
728 struct obd_device *obd = (struct obd_device *)castmeharder;
729 CERROR("recovery timed out, aborting\n");
730 spin_lock_bh(&obd->obd_processing_task_lock);
731 obd->obd_abort_recovery = 1;
732 wake_up(&obd->obd_next_transno_waitq);
733 spin_unlock_bh(&obd->obd_processing_task_lock);
737 /* obd_processing_task_lock should be held */
738 void target_cancel_recovery_timer(struct obd_device *obd)
740 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
741 del_timer(&obd->obd_recovery_timer);
744 static void reset_recovery_timer(struct obd_device *obd)
746 spin_lock_bh(&obd->obd_processing_task_lock);
747 if (!obd->obd_recovering) {
748 spin_unlock_bh(&obd->obd_processing_task_lock);
751 CDEBUG(D_HA, "timer will expire in %u seconds\n",
752 OBD_RECOVERY_TIMEOUT / HZ);
753 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
754 spin_unlock_bh(&obd->obd_processing_task_lock);
758 /* Only start it the first time called */
759 void target_start_recovery_timer(struct obd_device *obd)
761 spin_lock_bh(&obd->obd_processing_task_lock);
762 if (!obd->obd_recovering || timer_pending(&obd->obd_recovery_timer)) {
763 spin_unlock_bh(&obd->obd_processing_task_lock);
766 CWARN("%s: starting recovery timer (%us)\n", obd->obd_name,
767 OBD_RECOVERY_TIMEOUT / HZ);
768 obd->obd_recovery_timer.function = target_recovery_expired;
769 obd->obd_recovery_timer.data = (unsigned long)obd;
770 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
771 spin_unlock_bh(&obd->obd_processing_task_lock);
774 static void target_finish_recovery(struct obd_device *obd)
776 struct list_head *tmp, *n;
779 ldlm_reprocess_all_ns(obd->obd_namespace);
781 CWARN("%s: all clients recovered, calling postrecov\n",
783 /* when recovery finished, cleanup orphans on mds and ost */
784 if (OBT(obd) && OBP(obd, postrecov)) {
785 rc2 = OBP(obd, postrecov)(obd);
787 CWARN("%s: all clients recovered, %d MDS "
788 "orphans deleted\n", obd->obd_name, rc2);
790 CERROR("postrecov failed %d\n", rc2);
793 CWARN("%s: recovery over, sending delayed replies\n",
795 list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
796 struct ptlrpc_request *req;
797 req = list_entry(tmp, struct ptlrpc_request, rq_list);
798 DEBUG_REQ(D_ERROR, req, "delayed:");
800 ptlrpc_free_clone(req);
802 ptlrpc_run_recovery_over_upcall(obd);
805 static int check_for_next_transno(struct obd_device *obd)
807 struct ptlrpc_request *req;
808 int wake_up = 0, connected, completed, queue_len, max;
809 __u64 next_transno, req_transno;
811 spin_lock_bh(&obd->obd_processing_task_lock);
812 if (!list_empty(&obd->obd_recovery_queue)) {
813 req = list_entry(obd->obd_recovery_queue.next,
814 struct ptlrpc_request, rq_list);
815 req_transno = req->rq_reqmsg->transno;
820 max = obd->obd_max_recoverable_clients;
821 connected = obd->obd_connected_clients;
822 completed = max - obd->obd_recoverable_clients;
823 queue_len = obd->obd_requests_queued_for_recovery;
824 next_transno = obd->obd_next_recovery_transno;
826 CDEBUG(D_HA,"max: %d, connected: %d, completed: %d, queue_len: %d, "
827 "req_transno: "LPU64", next_transno: "LPU64"\n",
828 max, connected, completed, queue_len, req_transno, next_transno);
829 if (obd->obd_abort_recovery) {
830 CDEBUG(D_HA, "waking for aborted recovery\n");
832 } else if (max == completed) {
833 CDEBUG(D_HA, "waking for completed recovery\n");
835 } else if (req_transno == next_transno) {
836 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
838 } else if (queue_len + completed == max) {
839 LASSERT(req->rq_reqmsg->transno >= next_transno);
841 "waking for skipped transno (skip: "LPD64
842 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
843 next_transno, queue_len, completed, max, req_transno);
844 obd->obd_next_recovery_transno = req_transno;
847 spin_unlock_bh(&obd->obd_processing_task_lock);
852 static struct ptlrpc_request *
853 target_next_replay_req(struct obd_device *obd)
855 struct l_wait_info lwi = { 0 };
856 struct ptlrpc_request *req;
858 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
859 obd->obd_next_recovery_transno);
860 l_wait_event(obd->obd_next_transno_waitq,
861 check_for_next_transno(obd), &lwi);
863 spin_lock_bh(&obd->obd_processing_task_lock);
864 if (obd->obd_abort_recovery) {
866 } else if (!list_empty(&obd->obd_recovery_queue)) {
867 req = list_entry(obd->obd_recovery_queue.next,
868 struct ptlrpc_request, rq_list);
869 list_del_init(&req->rq_list);
870 obd->obd_requests_queued_for_recovery--;
874 spin_unlock_bh(&obd->obd_processing_task_lock);
879 static int target_recovery_thread(void *arg)
881 struct obd_device *obd = arg;
882 struct ptlrpc_request *req;
883 struct target_recovery_data *trd = &obd->obd_recovery_data;
887 kportal_daemonize("tgt-recov");
889 SIGNAL_MASK_LOCK(current, flags);
890 sigfillset(¤t->blocked);
892 SIGNAL_MASK_UNLOCK(current, flags);
894 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
896 trd->trd_processing_task = current->pid;
898 obd->obd_recovering = 1;
899 complete(&trd->trd_starting);
901 while (obd->obd_recovering) {
902 LASSERT(trd->trd_processing_task == current->pid);
903 req = target_next_replay_req(obd);
905 char peer_str[PTL_NALFMT_SIZE];
906 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s: ",
907 req->rq_reqmsg->transno,
908 ptlrpc_peernid2str(&req->rq_peer, peer_str));
909 (void)trd->trd_recovery_handler(req);
910 obd->obd_replayed_requests++;
911 reset_recovery_timer(obd);
912 /* bug 1580: decide how to properly sync() in recovery*/
913 //mds_fsync_super(mds->mds_sb);
914 ptlrpc_free_clone(req);
915 spin_lock_bh(&obd->obd_processing_task_lock);
916 obd->obd_next_recovery_transno++;
917 spin_unlock_bh(&obd->obd_processing_task_lock);
919 /* recovery is over */
920 spin_lock_bh(&obd->obd_processing_task_lock);
921 obd->obd_recovering = 0;
922 target_cancel_recovery_timer(obd);
923 if (obd->obd_abort_recovery) {
924 obd->obd_abort_recovery = 0;
925 spin_unlock_bh(&obd->obd_processing_task_lock);
926 target_abort_recovery(obd);
928 LASSERT(obd->obd_recoverable_clients == 0);
929 spin_unlock_bh(&obd->obd_processing_task_lock);
930 target_finish_recovery(obd);
935 trd->trd_processing_task = 0;
936 complete(&trd->trd_finishing);
940 int target_start_recovery_thread(struct obd_device *obd, svc_handler_t handler)
943 struct target_recovery_data *trd = &obd->obd_recovery_data;
945 memset(trd, 0, sizeof(*trd));
946 init_completion(&trd->trd_starting);
947 init_completion(&trd->trd_finishing);
948 trd->trd_recovery_handler = handler;
950 if (kernel_thread(target_recovery_thread, obd, 0) == 0)
951 wait_for_completion(&trd->trd_starting);
958 void target_stop_recovery_thread(struct obd_device *obd)
960 spin_lock_bh(&obd->obd_processing_task_lock);
961 if (obd->obd_recovery_data.trd_processing_task > 0) {
962 struct target_recovery_data *trd = &obd->obd_recovery_data;
963 CERROR("%s: aborting recovery\n", obd->obd_name);
964 obd->obd_abort_recovery = 1;
965 wake_up(&obd->obd_next_transno_waitq);
966 spin_unlock_bh(&obd->obd_processing_task_lock);
967 wait_for_completion(&trd->trd_finishing);
969 spin_unlock_bh(&obd->obd_processing_task_lock);
973 int target_queue_recovery_request(struct ptlrpc_request *req,
974 struct obd_device *obd)
976 struct list_head *tmp;
978 __u64 transno = req->rq_reqmsg->transno;
980 /* CAVEAT EMPTOR: The incoming request message has been swabbed
981 * (i.e. buflens etc are in my own byte order), but type-dependent
982 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
985 INIT_LIST_HEAD(&req->rq_list);
986 DEBUG_REQ(D_HA, req, "not queueing");
991 /* If we're processing the queue, we want don't want to queue this
994 * Also, if this request has a transno less than the one we're waiting
995 * for, we should process it now. It could (and currently always will)
996 * be an open request for a descriptor that was opened some time ago.
998 * Also, a resent, replayed request that has already been
999 * handled will pass through here and be processed immediately.
1001 spin_lock_bh(&obd->obd_processing_task_lock);
1002 if (obd->obd_recovery_data.trd_processing_task == current->pid ||
1003 transno < obd->obd_next_recovery_transno) {
1004 /* Processing the queue right now, don't re-add. */
1005 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1006 LASSERT(list_empty(&req->rq_list));
1007 spin_unlock_bh(&obd->obd_processing_task_lock);
1010 spin_unlock_bh(&obd->obd_processing_task_lock);
1012 /* A resent, replayed request that is still on the queue; just drop it.
1013 The queued request will handle this. */
1014 if ((lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY))
1015 == (MSG_RESENT | MSG_REPLAY)) {
1016 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
1020 req = ptlrpc_clone_req(req);
1024 spin_lock_bh(&obd->obd_processing_task_lock);
1027 list_for_each(tmp, &obd->obd_recovery_queue) {
1028 struct ptlrpc_request *reqiter =
1029 list_entry(tmp, struct ptlrpc_request, rq_list);
1031 if (reqiter->rq_reqmsg->transno > transno) {
1032 list_add_tail(&req->rq_list, &reqiter->rq_list);
1039 list_add_tail(&req->rq_list, &obd->obd_recovery_queue);
1042 obd->obd_requests_queued_for_recovery++;
1043 wake_up(&obd->obd_next_transno_waitq);
1044 spin_unlock_bh(&obd->obd_processing_task_lock);
1049 struct obd_device * target_req2obd(struct ptlrpc_request *req)
1051 return req->rq_export->exp_obd;
1054 int target_queue_final_reply(struct ptlrpc_request *req, int rc)
1056 struct obd_device *obd = target_req2obd(req);
1058 LASSERT ((rc == 0) == (req->rq_reply_state != NULL));
1061 /* Just like ptlrpc_error, but without the sending. */
1062 rc = lustre_pack_reply(req, 0, NULL, NULL);
1063 LASSERT(rc == 0); /* XXX handle this */
1064 req->rq_type = PTL_RPC_MSG_ERR;
1067 LASSERT (!req->rq_reply_state->rs_difficult);
1068 LASSERT(list_empty(&req->rq_list));
1070 req = ptlrpc_clone_req(req);
1072 spin_lock_bh(&obd->obd_processing_task_lock);
1074 list_add(&req->rq_list, &obd->obd_delayed_reply_queue);
1076 /* only count the first "replay over" request from each
1078 if (req->rq_export->exp_replay_needed) {
1079 --obd->obd_recoverable_clients;
1080 req->rq_export->exp_replay_needed = 0;
1081 CWARN("%s: %d recoverable clients remain\n",
1082 obd->obd_name, obd->obd_recoverable_clients);
1084 wake_up(&obd->obd_next_transno_waitq);
1085 spin_unlock_bh(&obd->obd_processing_task_lock);
1090 target_send_reply_msg (struct ptlrpc_request *req, int rc, int fail_id)
1092 if (OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
1093 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
1094 DEBUG_REQ(D_ERROR, req, "dropping reply");
1095 /* NB this does _not_ send with ACK disabled, to simulate
1096 * sending OK, but timing out for the ACK */
1097 if (req->rq_reply_state != NULL) {
1098 if (!req->rq_reply_state->rs_difficult) {
1099 lustre_free_reply_state (req->rq_reply_state);
1100 req->rq_reply_state = NULL;
1102 struct ptlrpc_service *svc =
1103 req->rq_rqbd->rqbd_srv_ni->sni_service;
1104 atomic_inc(&svc->srv_outstanding_replies);
1111 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
1112 if (req->rq_reply_state == NULL) {
1113 rc = lustre_pack_reply (req, 0, NULL, NULL);
1115 CERROR ("can't allocate reply\n");
1119 req->rq_type = PTL_RPC_MSG_ERR;
1121 DEBUG_REQ(D_NET, req, "sending reply");
1124 return (ptlrpc_send_reply(req, 1));
1128 target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
1131 unsigned long flags;
1132 struct ptlrpc_reply_state *rs;
1133 struct obd_device *obd;
1134 struct obd_export *exp;
1135 struct ptlrpc_srv_ni *sni;
1136 struct ptlrpc_service *svc;
1138 sni = req->rq_rqbd->rqbd_srv_ni;
1139 svc = sni->sni_service;
1141 rs = req->rq_reply_state;
1142 if (rs == NULL || !rs->rs_difficult) {
1143 /* The easy case; no notifiers and reply_out_callback()
1144 * cleans up (i.e. we can't look inside rs after a
1145 * successful send) */
1146 netrc = target_send_reply_msg (req, rc, fail_id);
1148 LASSERT (netrc == 0 || req->rq_reply_state == NULL);
1152 /* must be an export if locks saved */
1153 LASSERT (req->rq_export != NULL);
1154 /* req/reply consistent */
1155 LASSERT (rs->rs_srv_ni == sni);
1158 LASSERT (!rs->rs_scheduled);
1159 LASSERT (!rs->rs_scheduled_ever);
1160 LASSERT (!rs->rs_handled);
1161 LASSERT (!rs->rs_on_net);
1162 LASSERT (rs->rs_export == NULL);
1163 LASSERT (list_empty(&rs->rs_obd_list));
1164 LASSERT (list_empty(&rs->rs_exp_list));
1166 exp = class_export_get (req->rq_export);
1169 /* disable reply scheduling onto srv_reply_queue while I'm setting up */
1170 rs->rs_scheduled = 1;
1172 rs->rs_xid = req->rq_xid;
1173 rs->rs_transno = req->rq_transno;
1174 rs->rs_export = exp;
1176 spin_lock_irqsave (&obd->obd_uncommitted_replies_lock, flags);
1178 if (rs->rs_transno > obd->obd_last_committed) {
1179 /* not committed already */
1180 list_add_tail (&rs->rs_obd_list,
1181 &obd->obd_uncommitted_replies);
1184 spin_unlock (&obd->obd_uncommitted_replies_lock);
1185 spin_lock (&exp->exp_lock);
1187 list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies);
1189 spin_unlock_irqrestore (&exp->exp_lock, flags);
1191 netrc = target_send_reply_msg (req, rc, fail_id);
1193 spin_lock_irqsave (&svc->srv_lock, flags);
1195 svc->srv_n_difficult_replies++;
1197 if (netrc != 0) /* error sending: reply is off the net */
1200 if (!rs->rs_on_net || /* some notifier */
1201 list_empty(&rs->rs_exp_list) || /* completed already */
1202 list_empty(&rs->rs_obd_list)) {
1203 list_add_tail (&rs->rs_list, &svc->srv_reply_queue);
1204 wake_up (&svc->srv_waitq);
1206 list_add (&rs->rs_list, &sni->sni_active_replies);
1207 rs->rs_scheduled = 0; /* allow notifier to schedule */
1210 spin_unlock_irqrestore (&svc->srv_lock, flags);
1213 int target_handle_ping(struct ptlrpc_request *req)
1215 return lustre_pack_reply(req, 0, NULL, NULL);