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>
38 #include <linux/lustre_sec.h>
40 /* @priority: if non-zero, move the selected to the list head
41 * @nocreate: if non-zero, only search in existed connections
43 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
44 int priority, int nocreate)
46 struct ptlrpc_connection *ptlrpc_conn;
47 struct obd_import_conn *imp_conn = NULL, *item;
51 LASSERT(!(nocreate && !priority));
53 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
55 CERROR("can't find connection %s\n", uuid->uuid);
60 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
62 CERROR("fail to alloc memory\n");
63 GOTO(out_put, rc = -ENOMEM);
67 spin_lock(&imp->imp_lock);
68 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
69 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
71 list_del(&item->oic_item);
72 list_add(&item->oic_item, &imp->imp_conn_list);
73 item->oic_last_attempt = 0;
75 CDEBUG(D_HA, "imp %p@%s: find existed conn %s%s\n",
76 imp, imp->imp_obd->obd_name, uuid->uuid,
77 (priority ? ", move to head." : ""));
78 spin_unlock(&imp->imp_lock);
79 GOTO(out_free, rc = 0);
84 imp_conn->oic_conn = ptlrpc_conn;
85 imp_conn->oic_uuid = *uuid;
86 imp_conn->oic_last_attempt = 0;
88 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
90 list_add_tail(&imp_conn->oic_item, &imp->imp_conn_list);
91 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
92 imp, imp->imp_obd->obd_name, uuid->uuid,
93 (priority ? "head" : "tail"));
97 spin_unlock(&imp->imp_lock);
101 OBD_FREE(imp_conn, sizeof(*imp_conn));
103 ptlrpc_put_connection(ptlrpc_conn);
107 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
109 return import_set_conn(imp, uuid, 1, 1);
112 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
115 return import_set_conn(imp, uuid, priority, 0);
118 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
120 struct obd_import_conn *imp_conn;
121 struct obd_export *dlmexp;
125 spin_lock(&imp->imp_lock);
126 if (list_empty(&imp->imp_conn_list)) {
127 LASSERT(!imp->imp_conn_current);
128 LASSERT(!imp->imp_connection);
132 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
133 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
135 LASSERT(imp_conn->oic_conn);
137 /* is current conn? */
138 if (imp_conn == imp->imp_conn_current) {
139 LASSERT(imp_conn->oic_conn == imp->imp_connection);
141 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
142 imp->imp_state != LUSTRE_IMP_DISCON) {
143 CERROR("can't remove current connection\n");
144 GOTO(out, rc = -EBUSY);
147 ptlrpc_put_connection(imp->imp_connection);
148 imp->imp_connection = NULL;
150 dlmexp = class_conn2export(&imp->imp_dlm_handle);
151 if (dlmexp && dlmexp->exp_connection) {
152 LASSERT(dlmexp->exp_connection ==
154 ptlrpc_put_connection(dlmexp->exp_connection);
155 dlmexp->exp_connection = NULL;
159 list_del(&imp_conn->oic_item);
160 ptlrpc_put_connection(imp_conn->oic_conn);
161 OBD_FREE(imp_conn, sizeof(*imp_conn));
162 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
163 imp, imp->imp_obd->obd_name, uuid->uuid);
168 spin_unlock(&imp->imp_lock);
170 CERROR("connection %s not found\n", uuid->uuid);
174 int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf)
176 struct lustre_cfg* lcfg = buf;
177 struct client_obd *cli = &obddev->u.cli;
178 struct obd_import *imp;
179 struct obd_uuid server_uuid;
180 int rq_portal, rp_portal, connect_op;
181 char *name = obddev->obd_type->typ_name;
182 char *mgmt_name = NULL;
184 struct obd_device *mgmt_obd;
185 mgmtcli_register_for_events_t register_f;
188 /* In a more perfect world, we would hang a ptlrpc_client off of
189 * obd_type and just use the values from there. */
190 if (!strcmp(name, LUSTRE_OSC_NAME)) {
191 rq_portal = OST_REQUEST_PORTAL;
192 rp_portal = OSC_REPLY_PORTAL;
193 connect_op = OST_CONNECT;
194 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
195 rq_portal = MDS_REQUEST_PORTAL;
196 rp_portal = MDC_REPLY_PORTAL;
197 connect_op = MDS_CONNECT;
198 } else if (!strcmp(name, LUSTRE_MGMTCLI_NAME)) {
199 rq_portal = MGMT_REQUEST_PORTAL;
200 rp_portal = MGMT_REPLY_PORTAL;
201 connect_op = MGMT_CONNECT;
203 CERROR("unknown client OBD type \"%s\", can't setup\n",
209 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
210 CERROR("requires a TARGET UUID\n");
214 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
215 CERROR("client UUID must be less than 38 characters\n");
219 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
220 CERROR("setup requires a SERVER UUID\n");
224 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
225 CERROR("target UUID must be less than 38 characters\n");
229 sema_init(&cli->cl_sem, 1);
230 cli->cl_conn_count = 0;
231 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
232 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
233 sizeof(server_uuid)));
236 cli->cl_avail_grant = 0;
237 /* FIXME: should limit this for the sum of all cl_dirty_max */
238 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
239 if (cli->cl_dirty_max >> PAGE_SHIFT > num_physpages / 8)
240 cli->cl_dirty_max = num_physpages << (PAGE_SHIFT - 3);
241 INIT_LIST_HEAD(&cli->cl_cache_waiters);
242 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
243 INIT_LIST_HEAD(&cli->cl_loi_write_list);
244 INIT_LIST_HEAD(&cli->cl_loi_read_list);
245 spin_lock_init(&cli->cl_loi_list_lock);
246 cli->cl_r_in_flight = 0;
247 cli->cl_w_in_flight = 0;
248 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
249 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
250 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
251 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
253 if (num_physpages >> (20 - PAGE_SHIFT) <= 128) { /* <= 128 MB */
254 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES / 4;
255 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT / 4;
256 } else if (num_physpages >> (20 - PAGE_SHIFT) <= 512) { /* <= 512 MB */
257 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES / 2;
258 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT / 2;
260 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
261 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
266 CERROR("ldlm_get_ref failed: %d\n", rc);
270 ptlrpc_init_client(rq_portal, rp_portal, name,
271 &obddev->obd_ldlm_client);
273 imp = class_new_import();
275 GOTO(err_ldlm, rc = -ENOENT);
276 imp->imp_client = &obddev->obd_ldlm_client;
277 imp->imp_obd = obddev;
278 imp->imp_connect_op = connect_op;
279 imp->imp_generation = 0;
280 imp->imp_initial_recov = 1;
281 INIT_LIST_HEAD(&imp->imp_pinger_chain);
282 memcpy(imp->imp_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
283 LUSTRE_CFG_BUFLEN(lcfg, 1));
284 class_import_put(imp);
286 rc = client_import_add_conn(imp, &server_uuid, 1);
288 CERROR("can't add initial connection\n");
289 GOTO(err_import, rc);
292 cli->cl_import = imp;
293 cli->cl_max_mds_easize = sizeof(struct lov_mds_md);
294 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
295 cli->cl_sandev = to_kdev_t(0);
297 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
298 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
299 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
300 name, obddev->obd_name,
301 imp->imp_target_uuid.uuid);
302 imp->imp_invalid = 1;
304 if (LUSTRE_CFG_BUFLEN(lcfg, 4) > 0)
305 mgmt_name = lustre_cfg_string(lcfg, 4);
307 mgmt_name = lustre_cfg_string(lcfg, 3);
311 if (mgmt_name != NULL) {
312 /* Register with management client if we need to. */
313 CDEBUG(D_HA, "%s registering with %s for events about %s\n",
314 obddev->obd_name, mgmt_name, server_uuid.uuid);
316 mgmt_obd = class_name2obd(mgmt_name);
318 CERROR("can't find mgmtcli %s to register\n",
320 GOTO(err_import, rc = -ENOSYS);
323 register_f = (mgmtcli_register_for_events_t)symbol_get("mgmtcli_register_for_events");
325 CERROR("can't i_m_g mgmtcli_register_for_events\n");
326 GOTO(err_import, rc = -ENOSYS);
329 rc = register_f(mgmt_obd, obddev, &imp->imp_target_uuid);
330 symbol_put("mgmtcli_register_for_events");
333 cli->cl_mgmtcli_obd = mgmt_obd;
339 class_destroy_import(imp);
347 int client_obd_cleanup(struct obd_device *obddev, int flags)
349 struct client_obd *cli = &obddev->u.cli;
354 if (cli->cl_mgmtcli_obd) {
355 mgmtcli_deregister_for_events_t dereg_f;
357 dereg_f = (mgmtcli_deregister_for_events_t)symbol_get("mgmtcli_deregister_for_events");
358 dereg_f(cli->cl_mgmtcli_obd, obddev);
359 symbol_put("mgmtcli_deregister_for_events");
362 /* Here we try to drop the security structure after destroy import,
363 * to avoid issue of "sleep in spinlock".
365 class_import_get(cli->cl_import);
366 class_destroy_import(cli->cl_import);
367 ptlrpcs_import_drop_sec(cli->cl_import);
368 class_import_put(cli->cl_import);
369 cli->cl_import = NULL;
371 ldlm_put_ref(flags & OBD_OPT_FORCE);
376 int client_connect_import(struct lustre_handle *dlm_handle,
377 struct obd_device *obd,
378 struct obd_uuid *cluuid,
379 struct obd_connect_data *conn_data,
380 unsigned long connect_flags)
382 struct client_obd *cli = &obd->u.cli;
383 struct obd_import *imp = cli->cl_import;
384 struct obd_export *exp;
389 rc = class_connect(dlm_handle, obd, cluuid);
393 cli->cl_conn_count++;
394 if (cli->cl_conn_count > 1)
396 exp = class_conn2export(dlm_handle);
398 if (obd->obd_namespace != NULL)
399 CERROR("already have namespace!\n");
400 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
401 LDLM_NAMESPACE_CLIENT);
402 if (obd->obd_namespace == NULL)
403 GOTO(out_disco, rc = -ENOMEM);
405 rc = ptlrpcs_import_get_sec(imp);
409 imp->imp_dlm_handle = *dlm_handle;
410 rc = ptlrpc_init_import(imp);
414 imp->imp_connect_flags = connect_flags;
416 memcpy(&imp->imp_connect_data, conn_data, sizeof(*conn_data));
418 rc = ptlrpc_connect_import(imp, NULL);
420 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
423 LASSERT(exp->exp_connection);
424 ptlrpc_pinger_add_import(imp);
429 ldlm_namespace_free(obd->obd_namespace, 0);
430 obd->obd_namespace = NULL;
432 cli->cl_conn_count--;
433 class_disconnect(exp, 0);
435 class_export_put(exp);
442 int client_disconnect_export(struct obd_export *exp, unsigned long flags)
444 struct obd_device *obd = class_exp2obd(exp);
445 struct client_obd *cli = &obd->u.cli;
446 struct obd_import *imp = cli->cl_import;
451 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
452 exp, exp ? exp->exp_handle.h_cookie : -1);
457 if (!cli->cl_conn_count) {
458 CERROR("disconnecting disconnected device (%s)\n",
460 GOTO(out_sem, rc = -EINVAL);
463 cli->cl_conn_count--;
464 if (cli->cl_conn_count)
465 GOTO(out_no_disconnect, rc = 0);
467 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
468 * delete it regardless. (It's safe to delete an import that was
470 (void)ptlrpc_pinger_del_import(imp);
472 if (obd->obd_namespace != NULL) {
473 /* obd_no_recov == local only */
474 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
475 obd->obd_no_recov, NULL);
476 ldlm_namespace_free(obd->obd_namespace, obd->obd_no_recov);
477 obd->obd_namespace = NULL;
481 * Yeah, obd_no_recov also (mainly) means "forced shutdown".
483 if (obd->obd_no_recov)
484 ptlrpc_invalidate_import(imp, 0);
486 rc = ptlrpc_disconnect_import(imp);
490 err = class_disconnect(exp, 0);
498 /* --------------------------------------------------------------------------
499 * from old lib/target.c
500 * -------------------------------------------------------------------------- */
502 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
503 struct obd_uuid *cluuid, int initial_conn)
505 if (exp->exp_connection && !initial_conn) {
506 struct lustre_handle *hdl;
507 hdl = &exp->exp_imp_reverse->imp_remote_handle;
508 /* Might be a re-connect after a partition. */
509 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
510 CERROR("%s reconnecting\n", cluuid->uuid);
511 conn->cookie = exp->exp_handle.h_cookie;
514 CERROR("%s reconnecting from %s, "
515 "handle mismatch (ours "LPX64", theirs "
516 LPX64")\n", cluuid->uuid,
517 exp->exp_connection->c_remote_uuid.uuid,
518 hdl->cookie, conn->cookie);
519 memset(conn, 0, sizeof *conn);
524 conn->cookie = exp->exp_handle.h_cookie;
525 CDEBUG(D_INFO, "existing export for UUID '%s' at %p\n",
527 CDEBUG(D_IOCTL,"connect: cookie "LPX64"\n", conn->cookie);
531 static inline int ptlrpc_peer_is_local(struct ptlrpc_peer *peer)
533 ptl_process_id_t myid;
535 PtlGetId(peer->peer_ni->pni_ni_h, &myid);
536 return (memcmp(&peer->peer_id, &myid, sizeof(myid)) == 0);
539 int target_handle_connect(struct ptlrpc_request *req)
541 unsigned long connect_flags = 0, *cfp;
542 struct obd_device *target;
543 struct obd_export *export = NULL;
544 struct obd_import *revimp;
545 struct lustre_handle conn;
546 struct obd_uuid tgtuuid;
547 struct obd_uuid cluuid;
548 struct obd_uuid remote_uuid;
550 struct obd_connect_data *conn_data;
551 int conn_data_size = sizeof(*conn_data);
555 int initial_conn = 0;
556 char peer_str[PTL_NALFMT_SIZE];
557 const int offset = 1;
560 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
562 LASSERT_REQSWAB (req, offset + 0);
563 str = lustre_msg_string(req->rq_reqmsg, offset + 0,
564 sizeof(tgtuuid) - 1);
566 CERROR("bad target UUID for connect\n");
567 GOTO(out, rc = -EINVAL);
570 obd_str2uuid (&tgtuuid, str);
571 target = class_uuid2obd(&tgtuuid);
573 target = class_name2obd(str);
575 if (!target || target->obd_stopping || !target->obd_set_up) {
576 CERROR("UUID '%s' is not available for connect from %s\n",
577 str, req->rq_peerstr);
578 GOTO(out, rc = -ENODEV);
581 LASSERT_REQSWAB (req, offset + 1);
582 str = lustre_msg_string(req->rq_reqmsg, offset + 1, sizeof(cluuid) - 1);
584 CERROR("bad client UUID for connect\n");
585 GOTO(out, rc = -EINVAL);
588 obd_str2uuid (&cluuid, str);
590 /* XXX extract a nettype and format accordingly */
591 switch (sizeof(ptl_nid_t)) {
592 /* NB the casts only avoid compiler warnings */
594 snprintf(remote_uuid.uuid, sizeof remote_uuid,
595 "NET_"LPX64"_UUID", (__u64)req->rq_peer.peer_id.nid);
598 snprintf(remote_uuid.uuid, sizeof remote_uuid,
599 "NET_%x_UUID", (__u32)req->rq_peer.peer_id.nid);
605 tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, sizeof conn);
607 GOTO(out, rc = -EPROTO);
609 memcpy(&conn, tmp, sizeof conn);
611 cfp = lustre_msg_buf(req->rq_reqmsg, offset + 3, sizeof(unsigned long));
612 LASSERT(cfp != NULL);
613 connect_flags = *cfp;
615 conn_data = lustre_swab_reqbuf(req, offset + 4, sizeof(*conn_data),
616 lustre_swab_connect);
618 GOTO(out, rc = -EPROTO);
620 rc = lustre_pack_reply(req, 1, &conn_data_size, NULL);
624 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)
627 /* lctl gets a backstage, all-access pass. */
628 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
629 goto dont_check_exports;
631 spin_lock(&target->obd_dev_lock);
632 list_for_each(p, &target->obd_exports) {
633 export = list_entry(p, struct obd_export, exp_obd_chain);
634 if (obd_uuid_equals(&cluuid, &export->exp_client_uuid)) {
635 spin_unlock(&target->obd_dev_lock);
636 LASSERT(export->exp_obd == target);
638 rc = target_handle_reconnect(&conn, export, &cluuid,
644 /* If we found an export, we already unlocked. */
646 spin_unlock(&target->obd_dev_lock);
647 } else if (req->rq_export == NULL &&
648 atomic_read(&export->exp_rpc_count) > 0) {
649 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
650 target->obd_name, cluuid.uuid,
651 ptlrpc_peernid2str(&req->rq_peer, peer_str),
652 export, atomic_read(&export->exp_refcount));
653 GOTO(out, rc = -EBUSY);
654 } else if (req->rq_export != NULL &&
655 atomic_read(&export->exp_rpc_count) > 1) {
656 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
657 target->obd_name, cluuid.uuid,
658 ptlrpc_peernid2str(&req->rq_peer, peer_str),
659 export, atomic_read(&export->exp_rpc_count));
660 GOTO(out, rc = -EBUSY);
661 } else if (req->rq_reqmsg->conn_cnt == 1 && !initial_conn) {
662 CERROR("%s reconnected with 1 conn_cnt; cookies not random?\n",
664 GOTO(out, rc = -EALREADY);
667 /* Tell the client if we're in recovery. */
668 /* If this is the first client, start the recovery timer */
669 CWARN("%s: connection from %s@%s/%lu %s\n", target->obd_name, cluuid.uuid,
670 ptlrpc_peernid2str(&req->rq_peer, peer_str), *cfp,
671 target->obd_recovering ? "(recovering)" : "");
673 if (target->obd_recovering) {
674 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
675 target_start_recovery_timer(target);
679 /* Tell the client if we support replayable requests */
680 if (target->obd_replayable)
681 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
684 if (export == NULL) {
685 if (target->obd_recovering) {
686 CERROR("%s denying connection for new client %s@%s: "
687 "%d clients in recovery for %lds\n", target->obd_name,
689 ptlrpc_peernid2str(&req->rq_peer, peer_str),
690 target->obd_recoverable_clients,
691 (target->obd_recovery_timer.expires-jiffies)/HZ);
695 rc = obd_connect(&conn, target, &cluuid, conn_data,
700 /* Return only the parts of obd_connect_data that we understand, so the
701 * client knows that we don't understand the rest. */
702 conn_data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED;
703 memcpy(lustre_msg_buf(req->rq_repmsg, 0, sizeof(*conn_data)), conn_data,
706 /* Tell the client if we support replayable requests */
707 if (target->obd_replayable)
708 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
710 /* If all else goes well, this is our RPC return code. */
713 if (rc && rc != EALREADY)
716 req->rq_repmsg->handle = conn;
718 /* If the client and the server are the same node, we will already
719 * have an export that really points to the client's DLM export,
720 * because we have a shared handles table.
722 * XXX this will go away when shaver stops sending the "connect" handle
723 * in the real "remote handle" field of the request --phik 24 Apr 2003
725 if (req->rq_export != NULL)
726 class_export_put(req->rq_export);
728 /* ownership of this export ref transfers to the request */
729 export = req->rq_export = class_conn2export(&conn);
730 LASSERT(export != NULL);
732 spin_lock_irqsave(&export->exp_lock, flags);
734 req->rq_repmsg->conn_cnt = export->exp_conn_cnt + 1;
735 } else if (export->exp_conn_cnt >= req->rq_reqmsg->conn_cnt) {
736 CERROR("%s@%s: already connected at a higher conn_cnt: %d > %d\n",
737 cluuid.uuid, ptlrpc_peernid2str(&req->rq_peer, peer_str),
738 export->exp_conn_cnt,
739 req->rq_reqmsg->conn_cnt);
740 spin_unlock_irqrestore(&export->exp_lock, flags);
741 GOTO(out, rc = -EALREADY);
743 export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
744 spin_unlock_irqrestore(&export->exp_lock, flags);
746 /* request from liblustre? */
747 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT)
748 export->exp_libclient = 1;
750 if (!(lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_ASYNC) &&
751 ptlrpc_peer_is_local(&req->rq_peer)) {
752 CWARN("%s: exp %p set sync\n", target->obd_name, export);
753 export->exp_sync = 1;
755 CDEBUG(D_HA, "%s: exp %p set async\n",target->obd_name,export);
756 export->exp_sync = 0;
759 if (export->exp_connection != NULL)
760 ptlrpc_put_connection(export->exp_connection);
761 export->exp_connection = ptlrpc_get_connection(&req->rq_peer,
764 if (rc == EALREADY) {
765 /* We indicate the reconnection in a flag, not an error code. */
766 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
770 if (target->obd_recovering)
771 target->obd_connected_clients++;
773 memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, offset + 2, sizeof(conn)),
776 if (export->exp_imp_reverse != NULL) {
777 /* same logic as client_obd_cleanup */
778 class_import_get(export->exp_imp_reverse);
779 class_destroy_import(export->exp_imp_reverse);
780 ptlrpcs_import_drop_sec(export->exp_imp_reverse);
781 class_import_put(export->exp_imp_reverse);
784 /* for the rest part, we return -ENOTCONN in case of errors
785 * in order to let client initialize connection again.
787 revimp = export->exp_imp_reverse = class_new_import();
789 CERROR("fail to alloc new reverse import.\n");
790 GOTO(out, rc = -ENOTCONN);
793 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
794 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
795 revimp->imp_remote_handle = conn;
796 revimp->imp_obd = target;
797 revimp->imp_dlm_fake = 1;
798 revimp->imp_state = LUSTRE_IMP_FULL;
800 rc = ptlrpcs_import_get_sec(revimp);
802 CERROR("reverse import can not get sec: %d\n", rc);
803 class_destroy_import(revimp);
804 export->exp_imp_reverse = NULL;
805 GOTO(out, rc = -ENOTCONN);
808 class_import_put(revimp);
810 rc = obd_connect_post(export, initial_conn, connect_flags);
817 int target_handle_disconnect(struct ptlrpc_request *req)
819 struct obd_export *exp;
823 rc = lustre_pack_reply(req, 0, NULL, NULL);
827 /* keep the rq_export around so we can send the reply */
828 exp = class_export_get(req->rq_export);
829 req->rq_status = obd_disconnect(exp, 0);
833 void target_destroy_export(struct obd_export *exp)
835 /* exports created from last_rcvd data, and "fake"
836 exports created by lctl don't have an import */
837 if (exp->exp_imp_reverse != NULL) {
838 ptlrpcs_import_drop_sec(exp->exp_imp_reverse);
839 class_destroy_import(exp->exp_imp_reverse);
842 /* We cancel locks at disconnect time, but this will catch any locks
843 * granted in a race with recovery-induced disconnect. */
844 if (exp->exp_obd->obd_namespace != NULL)
845 ldlm_cancel_locks_for_export(exp);
852 struct ptlrpc_request *
853 ptlrpc_clone_req( struct ptlrpc_request *orig_req)
855 struct ptlrpc_request *copy_req;
856 struct lustre_msg *copy_reqmsg;
858 OBD_ALLOC(copy_req, sizeof *copy_req);
861 OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
863 OBD_FREE(copy_req, sizeof *copy_req);
867 memcpy(copy_req, orig_req, sizeof *copy_req);
868 memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
869 /* the copied req takes over the reply state and security data */
870 orig_req->rq_reply_state = NULL;
871 orig_req->rq_sec_svcdata = NULL;
873 copy_req->rq_reqmsg = copy_reqmsg;
874 class_export_get(copy_req->rq_export);
875 INIT_LIST_HEAD(©_req->rq_list);
880 void ptlrpc_free_clone( struct ptlrpc_request *req)
883 svcsec_cleanup_req(req);
885 class_export_put(req->rq_export);
886 list_del(&req->rq_list);
887 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
888 OBD_FREE(req, sizeof *req);
891 static void target_release_saved_req(struct ptlrpc_request *req)
894 svcsec_cleanup_req(req);
896 class_export_put(req->rq_export);
897 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
898 OBD_FREE(req, sizeof *req);
901 static void target_finish_recovery(struct obd_device *obd)
905 ldlm_reprocess_all_ns(obd->obd_namespace);
907 /* when recovery finished, cleanup orphans on mds and ost */
908 if (OBT(obd) && OBP(obd, postrecov)) {
909 rc = OBP(obd, postrecov)(obd);
911 CWARN("%s: all clients recovered, %d MDS "
912 "orphans deleted\n", obd->obd_name, rc);
914 CERROR("postrecov failed %d\n", rc);
917 obd->obd_recovery_end = LTIME_S(CURRENT_TIME);
921 static void abort_req_replay_queue(struct obd_device *obd)
923 struct ptlrpc_request *req;
924 struct list_head *tmp, *n;
927 list_for_each_safe(tmp, n, &obd->obd_req_replay_queue) {
928 req = list_entry(tmp, struct ptlrpc_request, rq_list);
929 list_del(&req->rq_list);
930 DEBUG_REQ(D_ERROR, req, "aborted:");
931 req->rq_status = -ENOTCONN;
932 req->rq_type = PTL_RPC_MSG_ERR;
933 rc = lustre_pack_reply(req, 0, NULL, NULL);
937 DEBUG_REQ(D_ERROR, req,
938 "packing failed for abort-reply; skipping");
940 target_release_saved_req(req);
944 static void abort_lock_replay_queue(struct obd_device *obd)
946 struct ptlrpc_request *req;
947 struct list_head *tmp, *n;
950 list_for_each_safe(tmp, n, &obd->obd_lock_replay_queue) {
951 req = list_entry(tmp, struct ptlrpc_request, rq_list);
952 list_del(&req->rq_list);
953 DEBUG_REQ(D_ERROR, req, "aborted:");
954 req->rq_status = -ENOTCONN;
955 req->rq_type = PTL_RPC_MSG_ERR;
956 rc = lustre_pack_reply(req, 0, NULL, NULL);
960 DEBUG_REQ(D_ERROR, req,
961 "packing failed for abort-reply; skipping");
963 target_release_saved_req(req);
967 /* Called from a cleanup function if the device is being cleaned up
968 forcefully. The exports should all have been disconnected already,
969 the only thing left to do is
970 - clear the recovery flags
972 - free queued requests and replies, but don't send replies
973 Because the obd_stopping flag is set, no new requests should be received.
976 void target_cleanup_recovery(struct obd_device *obd)
978 struct list_head *tmp, *n;
979 struct ptlrpc_request *req;
981 spin_lock_bh(&obd->obd_processing_task_lock);
982 if (!obd->obd_recovering) {
983 spin_unlock_bh(&obd->obd_processing_task_lock);
987 obd->obd_recovering = obd->obd_abort_recovery = 0;
988 target_cancel_recovery_timer(obd);
989 spin_unlock_bh(&obd->obd_processing_task_lock);
991 list_for_each_safe(tmp, n, &obd->obd_req_replay_queue) {
992 req = list_entry(tmp, struct ptlrpc_request, rq_list);
993 list_del(&req->rq_list);
994 LASSERT (req->rq_reply_state == 0);
995 target_release_saved_req(req);
997 list_for_each_safe(tmp, n, &obd->obd_lock_replay_queue) {
998 req = list_entry(tmp, struct ptlrpc_request, rq_list);
999 list_del(&req->rq_list);
1000 LASSERT (req->rq_reply_state == 0);
1001 target_release_saved_req(req);
1003 list_for_each_safe(tmp, n, &obd->obd_final_req_queue) {
1004 req = list_entry(tmp, struct ptlrpc_request, rq_list);
1005 list_del(&req->rq_list);
1006 LASSERT (req->rq_reply_state == 0);
1007 target_release_saved_req(req);
1012 static void target_abort_recovery(void *data)
1014 struct obd_device *obd = data;
1016 LASSERT(!obd->obd_recovering);
1018 class_disconnect_stale_exports(obd, 0);
1020 CERROR("%s: recovery period over; disconnecting unfinished clients.\n",
1023 abort_recovery_queue(obd);
1024 target_finish_recovery(obd);
1025 ptlrpc_run_recovery_over_upcall(obd);
1029 static void target_recovery_expired(unsigned long castmeharder)
1031 struct obd_device *obd = (struct obd_device *)castmeharder;
1032 spin_lock_bh(&obd->obd_processing_task_lock);
1033 if (obd->obd_recovering)
1034 obd->obd_abort_recovery = 1;
1036 wake_up(&obd->obd_next_transno_waitq);
1037 spin_unlock_bh(&obd->obd_processing_task_lock);
1041 /* obd_processing_task_lock should be held */
1042 void target_cancel_recovery_timer(struct obd_device *obd)
1044 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1045 del_timer(&obd->obd_recovery_timer);
1049 static void reset_recovery_timer(struct obd_device *obd)
1051 spin_lock_bh(&obd->obd_processing_task_lock);
1052 if (!obd->obd_recovering) {
1053 spin_unlock_bh(&obd->obd_processing_task_lock);
1056 CDEBUG(D_HA, "timer will expire in %u seconds\n",
1057 OBD_RECOVERY_TIMEOUT / HZ);
1058 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
1059 spin_unlock_bh(&obd->obd_processing_task_lock);
1063 /* Only start it the first time called */
1064 void target_start_recovery_timer(struct obd_device *obd)
1066 spin_lock_bh(&obd->obd_processing_task_lock);
1067 if (!obd->obd_recovering || timer_pending(&obd->obd_recovery_timer)) {
1068 spin_unlock_bh(&obd->obd_processing_task_lock);
1071 CWARN("%s: starting recovery timer (%us)\n", obd->obd_name,
1072 OBD_RECOVERY_TIMEOUT / HZ);
1073 obd->obd_recovery_timer.function = target_recovery_expired;
1074 obd->obd_recovery_timer.data = (unsigned long)obd;
1075 mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
1076 spin_unlock_bh(&obd->obd_processing_task_lock);
1080 static int check_for_next_transno(struct obd_device *obd)
1082 struct ptlrpc_request *req = NULL;
1083 int wake_up = 0, connected, completed, queue_len, max;
1084 __u64 next_transno, req_transno;
1086 spin_lock_bh(&obd->obd_processing_task_lock);
1087 if (!list_empty(&obd->obd_req_replay_queue)) {
1088 req = list_entry(obd->obd_req_replay_queue.next,
1089 struct ptlrpc_request, rq_list);
1090 req_transno = req->rq_reqmsg->transno;
1095 max = obd->obd_max_recoverable_clients;
1096 connected = obd->obd_connected_clients;
1097 completed = max - atomic_read(&obd->obd_req_replay_clients);
1098 queue_len = obd->obd_requests_queued_for_recovery;
1099 next_transno = obd->obd_next_recovery_transno;
1101 CDEBUG(D_HA,"max: %d, connected: %d, completed: %d, queue_len: %d, "
1102 "req_transno: "LPU64", next_transno: "LPU64"\n",
1103 max, connected, completed, queue_len, req_transno, next_transno);
1104 if (obd->obd_abort_recovery) {
1105 CDEBUG(D_HA, "waking for aborted recovery\n");
1107 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1108 CDEBUG(D_HA, "waking for completed recovery\n");
1110 } else if (req_transno == next_transno) {
1111 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1113 } else if (queue_len + completed == max) {
1114 LASSERT(req->rq_reqmsg->transno >= next_transno);
1116 "waking for skipped transno (skip: "LPD64
1117 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
1118 next_transno, queue_len, completed, max, req_transno);
1119 obd->obd_next_recovery_transno = req_transno;
1122 spin_unlock_bh(&obd->obd_processing_task_lock);
1127 static struct ptlrpc_request *
1128 target_next_replay_req(struct obd_device *obd)
1130 struct l_wait_info lwi = { 0 };
1131 struct ptlrpc_request *req;
1133 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1134 obd->obd_next_recovery_transno);
1135 l_wait_event(obd->obd_next_transno_waitq,
1136 check_for_next_transno(obd), &lwi);
1138 spin_lock_bh(&obd->obd_processing_task_lock);
1139 if (obd->obd_abort_recovery) {
1141 } else if (!list_empty(&obd->obd_req_replay_queue)) {
1142 req = list_entry(obd->obd_req_replay_queue.next,
1143 struct ptlrpc_request, rq_list);
1144 list_del_init(&req->rq_list);
1145 obd->obd_requests_queued_for_recovery--;
1149 spin_unlock_bh(&obd->obd_processing_task_lock);
1153 static int check_for_next_lock(struct obd_device *obd)
1155 struct ptlrpc_request *req = NULL;
1158 spin_lock_bh(&obd->obd_processing_task_lock);
1159 if (!list_empty(&obd->obd_lock_replay_queue)) {
1160 req = list_entry(obd->obd_lock_replay_queue.next,
1161 struct ptlrpc_request, rq_list);
1162 CDEBUG(D_HA, "waking for next lock\n");
1164 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1165 CDEBUG(D_HA, "waking for completed lock replay\n");
1167 } else if (obd->obd_abort_recovery) {
1168 CDEBUG(D_HA, "waking for aborted recovery\n");
1171 spin_unlock_bh(&obd->obd_processing_task_lock);
1176 static struct ptlrpc_request *
1177 target_next_replay_lock(struct obd_device *obd)
1179 struct l_wait_info lwi = { 0 };
1180 struct ptlrpc_request *req;
1182 CDEBUG(D_HA, "Waiting for lock\n");
1183 l_wait_event(obd->obd_next_transno_waitq,
1184 check_for_next_lock(obd), &lwi);
1186 spin_lock_bh(&obd->obd_processing_task_lock);
1187 if (obd->obd_abort_recovery) {
1189 } else if (!list_empty(&obd->obd_lock_replay_queue)) {
1190 req = list_entry(obd->obd_lock_replay_queue.next,
1191 struct ptlrpc_request, rq_list);
1192 list_del_init(&req->rq_list);
1196 spin_unlock_bh(&obd->obd_processing_task_lock);
1200 static struct ptlrpc_request *
1201 target_next_final_ping(struct obd_device *obd)
1203 struct ptlrpc_request *req;
1205 spin_lock_bh(&obd->obd_processing_task_lock);
1206 if (!list_empty(&obd->obd_final_req_queue)) {
1207 req = list_entry(obd->obd_final_req_queue.next,
1208 struct ptlrpc_request, rq_list);
1209 list_del_init(&req->rq_list);
1213 spin_unlock_bh(&obd->obd_processing_task_lock);
1217 static int req_replay_done(struct obd_export *exp)
1219 if (exp->exp_req_replay_needed)
1224 static int lock_replay_done(struct obd_export *exp)
1226 if (exp->exp_lock_replay_needed)
1231 static int target_recovery_thread(void *arg)
1233 struct obd_device *obd = arg;
1234 struct ptlrpc_request *req;
1235 struct target_recovery_data *trd = &obd->obd_recovery_data;
1236 char peer_str[PTL_NALFMT_SIZE];
1237 unsigned long flags;
1240 kportal_daemonize("tgt-recov");
1242 SIGNAL_MASK_LOCK(current, flags);
1243 sigfillset(¤t->blocked);
1245 SIGNAL_MASK_UNLOCK(current, flags);
1247 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
1249 trd->trd_processing_task = current->pid;
1251 obd->obd_recovering = 1;
1252 complete(&trd->trd_starting);
1254 /* The first stage: replay requests */
1255 CWARN("1: request replay stage - %d clients\n",
1256 atomic_read(&obd->obd_req_replay_clients));
1257 while ((req = target_next_replay_req(obd))) {
1258 LASSERT(trd->trd_processing_task == current->pid);
1259 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s: ",
1260 req->rq_reqmsg->transno,
1261 ptlrpc_peernid2str(&req->rq_peer, peer_str));
1262 (void)trd->trd_recovery_handler(req);
1263 obd->obd_replayed_requests++;
1264 reset_recovery_timer(obd);
1265 /* bug 1580: decide how to properly sync() in recovery*/
1266 //mds_fsync_super(mds->mds_sb);
1267 ptlrpc_free_clone(req);
1268 spin_lock_bh(&obd->obd_processing_task_lock);
1269 obd->obd_next_recovery_transno++;
1270 spin_unlock_bh(&obd->obd_processing_task_lock);
1273 spin_lock_bh(&obd->obd_processing_task_lock);
1274 target_cancel_recovery_timer(obd);
1275 spin_unlock_bh(&obd->obd_processing_task_lock);
1277 /* If some clients haven't replayed requests in time, evict them */
1278 if (obd->obd_abort_recovery) {
1280 CERROR("req replay timed out, aborting ...\n");
1281 obd->obd_abort_recovery = 0;
1282 stale = class_disconnect_stale_exports(obd, req_replay_done, 0);
1283 atomic_sub(stale, &obd->obd_lock_replay_clients);
1284 abort_req_replay_queue(obd);
1287 /* The second stage: replay locks */
1288 CWARN("2: lock replay stage - %d clients\n",
1289 atomic_read(&obd->obd_lock_replay_clients));
1290 while ((req = target_next_replay_lock(obd))) {
1291 LASSERT(trd->trd_processing_task == current->pid);
1292 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
1293 ptlrpc_peernid2str(&req->rq_peer, peer_str));
1294 (void)trd->trd_recovery_handler(req);
1295 reset_recovery_timer(obd);
1296 ptlrpc_free_clone(req);
1297 obd->obd_replayed_locks++;
1300 spin_lock_bh(&obd->obd_processing_task_lock);
1301 target_cancel_recovery_timer(obd);
1302 spin_unlock_bh(&obd->obd_processing_task_lock);
1304 /* If some clients haven't replayed requests in time, evict them */
1305 if (obd->obd_abort_recovery) {
1307 CERROR("lock replay timed out, aborting ...\n");
1308 obd->obd_abort_recovery = 0;
1309 stale = class_disconnect_stale_exports(obd, lock_replay_done, 0);
1310 abort_lock_replay_queue(obd);
1313 /* We drop recoverying flag to forward all new requests
1314 * to regular mds_handle() since now */
1315 spin_lock_bh(&obd->obd_processing_task_lock);
1316 obd->obd_recovering = 0;
1317 spin_unlock_bh(&obd->obd_processing_task_lock);
1319 /* The third stage: reply on final pings */
1320 CWARN("3: final stage - process recovery completion pings\n");
1321 while ((req = target_next_final_ping(obd))) {
1322 LASSERT(trd->trd_processing_task == current->pid);
1323 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1324 ptlrpc_peernid2str(&req->rq_peer, peer_str));
1325 (void)trd->trd_recovery_handler(req);
1326 ptlrpc_free_clone(req);
1329 CWARN("4: recovery completed - %d/%d reqs/locks replayed\n",
1330 obd->obd_replayed_requests, obd->obd_replayed_locks);
1331 target_finish_recovery(obd);
1333 trd->trd_processing_task = 0;
1334 complete(&trd->trd_finishing);
1338 int target_start_recovery_thread(struct obd_device *obd, svc_handler_t handler)
1341 struct target_recovery_data *trd = &obd->obd_recovery_data;
1343 memset(trd, 0, sizeof(*trd));
1344 init_completion(&trd->trd_starting);
1345 init_completion(&trd->trd_finishing);
1346 trd->trd_recovery_handler = handler;
1348 if (kernel_thread(target_recovery_thread, obd, 0) == 0)
1349 wait_for_completion(&trd->trd_starting);
1356 void target_stop_recovery_thread(struct obd_device *obd)
1358 spin_lock_bh(&obd->obd_processing_task_lock);
1359 if (obd->obd_recovery_data.trd_processing_task > 0) {
1360 struct target_recovery_data *trd = &obd->obd_recovery_data;
1361 CERROR("%s: aborting recovery\n", obd->obd_name);
1362 obd->obd_abort_recovery = 1;
1363 wake_up(&obd->obd_next_transno_waitq);
1364 spin_unlock_bh(&obd->obd_processing_task_lock);
1365 wait_for_completion(&trd->trd_finishing);
1367 spin_unlock_bh(&obd->obd_processing_task_lock);
1372 int target_process_req_flags(struct obd_device *obd, struct ptlrpc_request *req)
1374 struct obd_export *exp = req->rq_export;
1375 LASSERT(exp != NULL);
1376 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1377 /* client declares he's ready to replay locks */
1378 spin_lock_bh(&obd->obd_processing_task_lock);
1379 if (exp->exp_req_replay_needed) {
1380 LASSERT(atomic_read(&obd->obd_req_replay_clients) > 0);
1381 exp->exp_req_replay_needed = 0;
1382 atomic_dec(&obd->obd_req_replay_clients);
1383 if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1384 CDEBUG(D_HA, "all clients have replayed reqs\n");
1385 wake_up(&obd->obd_next_transno_waitq);
1388 spin_unlock_bh(&obd->obd_processing_task_lock);
1390 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1391 /* client declares he's ready to complete recovery
1392 * so, we put the request on th final queue */
1393 spin_lock_bh(&obd->obd_processing_task_lock);
1394 if (exp->exp_lock_replay_needed) {
1395 LASSERT(atomic_read(&obd->obd_lock_replay_clients) > 0);
1396 exp->exp_lock_replay_needed = 0;
1397 atomic_dec(&obd->obd_lock_replay_clients);
1398 if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1399 CDEBUG(D_HA, "all clients have replayed locks\n");
1400 wake_up(&obd->obd_next_transno_waitq);
1403 spin_unlock_bh(&obd->obd_processing_task_lock);
1409 int target_queue_recovery_request(struct ptlrpc_request *req,
1410 struct obd_device *obd)
1412 struct list_head *tmp;
1414 __u64 transno = req->rq_reqmsg->transno;
1416 if (obd->obd_recovery_data.trd_processing_task == current->pid) {
1417 /* Processing the queue right now, don't re-add. */
1421 target_process_req_flags(obd, req);
1423 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1424 /* client declares he's ready to complete recovery
1425 * so, we put the request on th final queue */
1426 req = ptlrpc_clone_req(req);
1429 DEBUG_REQ(D_HA, req, "queue final req");
1430 spin_lock_bh(&obd->obd_processing_task_lock);
1431 list_add_tail(&req->rq_list, &obd->obd_final_req_queue);
1432 spin_unlock_bh(&obd->obd_processing_task_lock);
1435 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1436 /* client declares he's ready to replay locks */
1437 req = ptlrpc_clone_req(req);
1440 DEBUG_REQ(D_HA, req, "queue lock replay req");
1441 spin_lock_bh(&obd->obd_processing_task_lock);
1442 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
1443 spin_unlock_bh(&obd->obd_processing_task_lock);
1444 wake_up(&obd->obd_next_transno_waitq);
1449 /* CAVEAT EMPTOR: The incoming request message has been swabbed
1450 * (i.e. buflens etc are in my own byte order), but type-dependent
1451 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
1454 INIT_LIST_HEAD(&req->rq_list);
1455 DEBUG_REQ(D_HA, req, "not queueing");
1460 /* If we're processing the queue, we want don't want to queue this
1463 * Also, if this request has a transno less than the one we're waiting
1464 * for, we should process it now. It could (and currently always will)
1465 * be an open request for a descriptor that was opened some time ago.
1467 * Also, a resent, replayed request that has already been
1468 * handled will pass through here and be processed immediately.
1470 spin_lock_bh(&obd->obd_processing_task_lock);
1471 if (transno < obd->obd_next_recovery_transno) {
1472 /* Processing the queue right now, don't re-add. */
1473 LASSERT(list_empty(&req->rq_list));
1474 spin_unlock_bh(&obd->obd_processing_task_lock);
1477 spin_unlock_bh(&obd->obd_processing_task_lock);
1479 /* A resent, replayed request that is still on the queue; just drop it.
1480 The queued request will handle this. */
1481 if ((lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY))
1482 == (MSG_RESENT | MSG_REPLAY)) {
1483 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
1487 req = ptlrpc_clone_req(req);
1491 spin_lock_bh(&obd->obd_processing_task_lock);
1494 list_for_each(tmp, &obd->obd_req_replay_queue) {
1495 struct ptlrpc_request *reqiter =
1496 list_entry(tmp, struct ptlrpc_request, rq_list);
1498 if (reqiter->rq_reqmsg->transno > transno) {
1499 list_add_tail(&req->rq_list, &reqiter->rq_list);
1506 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
1508 obd->obd_requests_queued_for_recovery++;
1509 wake_up(&obd->obd_next_transno_waitq);
1510 spin_unlock_bh(&obd->obd_processing_task_lock);
1514 struct obd_device * target_req2obd(struct ptlrpc_request *req)
1516 return req->rq_export->exp_obd;
1520 target_send_reply_msg (struct ptlrpc_request *req, int rc, int fail_id)
1522 if (OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
1523 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
1524 DEBUG_REQ(D_ERROR, req, "dropping reply");
1525 /* NB this does _not_ send with ACK disabled, to simulate
1526 * sending OK, but timing out for the ACK */
1527 if (req->rq_reply_state != NULL) {
1528 if (!req->rq_reply_state->rs_difficult) {
1529 lustre_free_reply_state (req->rq_reply_state);
1530 req->rq_reply_state = NULL;
1532 struct ptlrpc_service *svc =
1533 req->rq_rqbd->rqbd_srv_ni->sni_service;
1534 atomic_inc(&svc->srv_outstanding_replies);
1541 req->rq_status = rc;
1542 return (ptlrpc_error(req));
1544 DEBUG_REQ(D_NET, req, "sending reply");
1547 return (ptlrpc_send_reply(req, 1));
1551 target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
1554 unsigned long flags;
1555 struct ptlrpc_reply_state *rs;
1556 struct obd_device *obd;
1557 struct obd_export *exp;
1558 struct ptlrpc_srv_ni *sni;
1559 struct ptlrpc_service *svc;
1561 sni = req->rq_rqbd->rqbd_srv_ni;
1562 svc = sni->sni_service;
1564 rs = req->rq_reply_state;
1565 if (rs == NULL || !rs->rs_difficult) {
1566 /* The easy case; no notifiers and reply_out_callback()
1567 * cleans up (i.e. we can't look inside rs after a
1568 * successful send) */
1569 netrc = target_send_reply_msg (req, rc, fail_id);
1571 LASSERT (netrc == 0 || req->rq_reply_state == NULL);
1575 /* must be an export if locks saved */
1576 LASSERT (req->rq_export != NULL);
1577 /* req/reply consistent */
1578 LASSERT (rs->rs_srv_ni == sni);
1581 LASSERT (!rs->rs_scheduled);
1582 LASSERT (!rs->rs_scheduled_ever);
1583 LASSERT (!rs->rs_handled);
1584 LASSERT (!rs->rs_on_net);
1585 LASSERT (rs->rs_export == NULL);
1586 LASSERT (list_empty(&rs->rs_obd_list));
1587 LASSERT (list_empty(&rs->rs_exp_list));
1589 exp = class_export_get (req->rq_export);
1592 /* disable reply scheduling onto srv_reply_queue while I'm setting up */
1593 rs->rs_scheduled = 1;
1595 rs->rs_xid = req->rq_xid;
1596 rs->rs_transno = req->rq_transno;
1597 rs->rs_export = exp;
1599 spin_lock_irqsave (&obd->obd_uncommitted_replies_lock, flags);
1601 if (rs->rs_transno > obd->obd_last_committed) {
1602 /* not committed already */
1603 list_add_tail (&rs->rs_obd_list,
1604 &obd->obd_uncommitted_replies);
1607 spin_unlock (&obd->obd_uncommitted_replies_lock);
1608 spin_lock (&exp->exp_lock);
1610 list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies);
1612 spin_unlock_irqrestore (&exp->exp_lock, flags);
1614 netrc = target_send_reply_msg (req, rc, fail_id);
1616 spin_lock_irqsave (&svc->srv_lock, flags);
1618 svc->srv_n_difficult_replies++;
1620 if (netrc != 0) /* error sending: reply is off the net */
1623 if (!rs->rs_on_net || /* some notifier */
1624 list_empty(&rs->rs_exp_list) || /* completed already */
1625 list_empty(&rs->rs_obd_list)) {
1626 list_add_tail (&rs->rs_list, &svc->srv_reply_queue);
1627 wake_up (&svc->srv_waitq);
1629 list_add (&rs->rs_list, &sni->sni_active_replies);
1630 rs->rs_scheduled = 0; /* allow notifier to schedule */
1633 spin_unlock_irqrestore (&svc->srv_lock, flags);
1636 int target_handle_ping(struct ptlrpc_request *req)
1638 return lustre_pack_reply(req, 0, NULL, NULL);