1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_LDLM
43 # include <libcfs/libcfs.h>
45 # include <liblustre.h>
48 #include <lustre_mds.h>
49 #include <lustre_dlm.h>
50 #include <lustre_net.h>
51 #include <lustre_sec.h>
52 #include "ldlm_internal.h"
54 /* @priority: if non-zero, move the selected to the list head
55 * @create: if zero, only search in existed connections
57 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
58 int priority, int create)
60 struct ptlrpc_connection *ptlrpc_conn;
61 struct obd_import_conn *imp_conn = NULL, *item;
65 if (!create && !priority) {
66 CDEBUG(D_HA, "Nothing to do\n");
70 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
72 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
77 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
79 GOTO(out_put, rc = -ENOMEM);
83 cfs_spin_lock(&imp->imp_lock);
84 cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
85 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
87 cfs_list_del(&item->oic_item);
88 cfs_list_add(&item->oic_item,
90 item->oic_last_attempt = 0;
92 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
93 imp, imp->imp_obd->obd_name, uuid->uuid,
94 (priority ? ", moved to head" : ""));
95 cfs_spin_unlock(&imp->imp_lock);
96 GOTO(out_free, rc = 0);
101 imp_conn->oic_conn = ptlrpc_conn;
102 imp_conn->oic_uuid = *uuid;
103 imp_conn->oic_last_attempt = 0;
105 cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list);
107 cfs_list_add_tail(&imp_conn->oic_item,
108 &imp->imp_conn_list);
109 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
110 imp, imp->imp_obd->obd_name, uuid->uuid,
111 (priority ? "head" : "tail"));
113 cfs_spin_unlock(&imp->imp_lock);
114 GOTO(out_free, rc = -ENOENT);
117 cfs_spin_unlock(&imp->imp_lock);
121 OBD_FREE(imp_conn, sizeof(*imp_conn));
123 ptlrpc_connection_put(ptlrpc_conn);
127 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
129 return import_set_conn(imp, uuid, 1, 0);
132 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
135 return import_set_conn(imp, uuid, priority, 1);
138 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
140 struct obd_import_conn *imp_conn;
141 struct obd_export *dlmexp;
145 cfs_spin_lock(&imp->imp_lock);
146 if (cfs_list_empty(&imp->imp_conn_list)) {
147 LASSERT(!imp->imp_connection);
151 cfs_list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
152 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
154 LASSERT(imp_conn->oic_conn);
156 /* is current conn? */
157 if (imp_conn == imp->imp_conn_current) {
158 LASSERT(imp_conn->oic_conn == imp->imp_connection);
160 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
161 imp->imp_state != LUSTRE_IMP_DISCON) {
162 CERROR("can't remove current connection\n");
163 GOTO(out, rc = -EBUSY);
166 ptlrpc_connection_put(imp->imp_connection);
167 imp->imp_connection = NULL;
169 dlmexp = class_conn2export(&imp->imp_dlm_handle);
170 if (dlmexp && dlmexp->exp_connection) {
171 LASSERT(dlmexp->exp_connection ==
173 ptlrpc_connection_put(dlmexp->exp_connection);
174 dlmexp->exp_connection = NULL;
178 cfs_list_del(&imp_conn->oic_item);
179 ptlrpc_connection_put(imp_conn->oic_conn);
180 OBD_FREE(imp_conn, sizeof(*imp_conn));
181 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
182 imp, imp->imp_obd->obd_name, uuid->uuid);
187 cfs_spin_unlock(&imp->imp_lock);
189 CERROR("connection %s not found\n", uuid->uuid);
193 void client_destroy_import(struct obd_import *imp)
195 /* drop security policy instance after all rpc finished/aborted
196 * to let all busy contexts be released. */
197 class_import_get(imp);
198 class_destroy_import(imp);
199 sptlrpc_import_sec_put(imp);
200 class_import_put(imp);
203 /* configure an RPC client OBD device
208 * 3 - inactive-on-startup
210 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
212 struct client_obd *cli = &obddev->u.cli;
213 struct obd_import *imp;
214 struct obd_uuid server_uuid;
215 int rq_portal, rp_portal, connect_op;
216 char *name = obddev->obd_type->typ_name;
220 /* In a more perfect world, we would hang a ptlrpc_client off of
221 * obd_type and just use the values from there. */
222 if (!strcmp(name, LUSTRE_OSC_NAME)) {
223 rq_portal = OST_REQUEST_PORTAL;
224 rp_portal = OSC_REPLY_PORTAL;
225 connect_op = OST_CONNECT;
226 cli->cl_sp_me = LUSTRE_SP_CLI;
227 cli->cl_sp_to = LUSTRE_SP_OST;
228 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
229 rq_portal = MDS_REQUEST_PORTAL;
230 rp_portal = MDC_REPLY_PORTAL;
231 connect_op = MDS_CONNECT;
232 cli->cl_sp_me = LUSTRE_SP_CLI;
233 cli->cl_sp_to = LUSTRE_SP_MDT;
234 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
235 rq_portal = MGS_REQUEST_PORTAL;
236 rp_portal = MGC_REPLY_PORTAL;
237 connect_op = MGS_CONNECT;
238 cli->cl_sp_me = LUSTRE_SP_MGC;
239 cli->cl_sp_to = LUSTRE_SP_MGS;
240 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
242 CERROR("unknown client OBD type \"%s\", can't setup\n",
247 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
248 CERROR("requires a TARGET UUID\n");
252 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
253 CERROR("client UUID must be less than 38 characters\n");
257 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
258 CERROR("setup requires a SERVER UUID\n");
262 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
263 CERROR("target UUID must be less than 38 characters\n");
267 cfs_init_rwsem(&cli->cl_sem);
268 cfs_sema_init(&cli->cl_mgc_sem, 1);
269 cli->cl_conn_count = 0;
270 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
271 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
272 sizeof(server_uuid)));
275 cli->cl_avail_grant = 0;
276 /* FIXME: should limit this for the sum of all cl_dirty_max */
277 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
278 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > cfs_num_physpages / 8)
279 cli->cl_dirty_max = cfs_num_physpages << (CFS_PAGE_SHIFT - 3);
280 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
281 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
282 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
283 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
284 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
285 client_obd_list_lock_init(&cli->cl_loi_list_lock);
286 cli->cl_r_in_flight = 0;
287 cli->cl_w_in_flight = 0;
289 cfs_spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
290 cfs_spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
291 cfs_spin_lock_init(&cli->cl_read_page_hist.oh_lock);
292 cfs_spin_lock_init(&cli->cl_write_page_hist.oh_lock);
293 cfs_spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
294 cfs_spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
295 cfs_waitq_init(&cli->cl_destroy_waitq);
296 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
297 #ifdef ENABLE_CHECKSUM
298 /* Turn on checksumming by default. */
299 cli->cl_checksum = 1;
301 * The supported checksum types will be worked out at connect time
302 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
305 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
307 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
309 /* This value may be changed at connect time in
310 ptlrpc_connect_interpret. */
311 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
312 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
314 if (!strcmp(name, LUSTRE_MDC_NAME)) {
315 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
316 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
317 cli->cl_max_rpcs_in_flight = 2;
318 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
319 cli->cl_max_rpcs_in_flight = 3;
320 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
321 cli->cl_max_rpcs_in_flight = 4;
323 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
328 CERROR("ldlm_get_ref failed: %d\n", rc);
332 ptlrpc_init_client(rq_portal, rp_portal, name,
333 &obddev->obd_ldlm_client);
335 imp = class_new_import(obddev);
337 GOTO(err_ldlm, rc = -ENOENT);
338 imp->imp_client = &obddev->obd_ldlm_client;
339 imp->imp_connect_op = connect_op;
340 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
341 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
342 LUSTRE_CFG_BUFLEN(lcfg, 1));
343 class_import_put(imp);
345 rc = client_import_add_conn(imp, &server_uuid, 1);
347 CERROR("can't add initial connection\n");
348 GOTO(err_import, rc);
351 cli->cl_import = imp;
352 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
353 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
354 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
356 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
357 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
358 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
359 name, obddev->obd_name,
360 cli->cl_target_uuid.uuid);
361 cfs_spin_lock(&imp->imp_lock);
362 imp->imp_deactive = 1;
363 cfs_spin_unlock(&imp->imp_lock);
367 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
368 LDLM_NAMESPACE_CLIENT,
369 LDLM_NAMESPACE_GREEDY);
370 if (obddev->obd_namespace == NULL) {
371 CERROR("Unable to create client namespace - %s\n",
373 GOTO(err_import, rc = -ENOMEM);
376 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
381 class_destroy_import(imp);
389 int client_obd_cleanup(struct obd_device *obddev)
393 ldlm_namespace_free_post(obddev->obd_namespace);
394 obddev->obd_namespace = NULL;
400 /* ->o_connect() method for client side (OSC and MDC and MGC) */
401 int client_connect_import(const struct lu_env *env,
402 struct obd_export **exp,
403 struct obd_device *obd, struct obd_uuid *cluuid,
404 struct obd_connect_data *data, void *localdata)
406 struct client_obd *cli = &obd->u.cli;
407 struct obd_import *imp = cli->cl_import;
408 struct obd_connect_data *ocd;
409 struct lustre_handle conn = { 0 };
414 cfs_down_write(&cli->cl_sem);
415 if (cli->cl_conn_count > 0 )
416 GOTO(out_sem, rc = -EALREADY);
418 rc = class_connect(&conn, obd, cluuid);
422 cli->cl_conn_count++;
423 *exp = class_conn2export(&conn);
425 LASSERT(obd->obd_namespace);
427 imp->imp_dlm_handle = conn;
428 rc = ptlrpc_init_import(imp);
432 ocd = &imp->imp_connect_data;
435 imp->imp_connect_flags_orig = data->ocd_connect_flags;
438 rc = ptlrpc_connect_import(imp, NULL);
440 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
443 LASSERT((*exp)->exp_connection);
446 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
447 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
448 data->ocd_connect_flags, ocd->ocd_connect_flags);
449 data->ocd_connect_flags = ocd->ocd_connect_flags;
452 ptlrpc_pinger_add_import(imp);
458 cli->cl_conn_count--;
459 class_disconnect(*exp);
463 cfs_up_write(&cli->cl_sem);
468 int client_disconnect_export(struct obd_export *exp)
470 struct obd_device *obd = class_exp2obd(exp);
471 struct client_obd *cli;
472 struct obd_import *imp;
477 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
478 exp, exp ? exp->exp_handle.h_cookie : -1);
483 imp = cli->cl_import;
485 cfs_down_write(&cli->cl_sem);
486 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
489 if (!cli->cl_conn_count) {
490 CERROR("disconnecting disconnected device (%s)\n",
492 GOTO(out_disconnect, rc = -EINVAL);
495 cli->cl_conn_count--;
496 if (cli->cl_conn_count)
497 GOTO(out_disconnect, rc = 0);
499 /* Mark import deactivated now, so we don't try to reconnect if any
500 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
501 * fully deactivate the import, or that would drop all requests. */
502 cfs_spin_lock(&imp->imp_lock);
503 imp->imp_deactive = 1;
504 cfs_spin_unlock(&imp->imp_lock);
506 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
507 * delete it regardless. (It's safe to delete an import that was
509 (void)ptlrpc_pinger_del_import(imp);
511 if (obd->obd_namespace != NULL) {
512 /* obd_force == local only */
513 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
514 obd->obd_force ? LCF_LOCAL : 0, NULL);
515 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
519 * there's no need to hold sem during disconnecting an import,
520 * and actually it may cause deadlock in gss.
522 cfs_up_write(&cli->cl_sem);
523 rc = ptlrpc_disconnect_import(imp, 0);
524 cfs_down_write(&cli->cl_sem);
526 ptlrpc_invalidate_import(imp);
528 if (imp->imp_rq_pool) {
529 ptlrpc_free_rq_pool(imp->imp_rq_pool);
530 imp->imp_rq_pool = NULL;
532 client_destroy_import(imp);
533 cli->cl_import = NULL;
538 /* use server style - class_disconnect should be always called for
540 err = class_disconnect(exp);
544 cfs_up_write(&cli->cl_sem);
549 int server_disconnect_export(struct obd_export *exp)
554 /* Disconnect early so that clients can't keep using export */
555 rc = class_disconnect(exp);
556 /* close import for avoid sending any requests */
557 if (exp->exp_imp_reverse)
558 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
560 if (exp->exp_obd->obd_namespace != NULL)
561 ldlm_cancel_locks_for_export(exp);
563 /* complete all outstanding replies */
564 cfs_spin_lock(&exp->exp_lock);
565 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
566 struct ptlrpc_reply_state *rs =
567 cfs_list_entry(exp->exp_outstanding_replies.next,
568 struct ptlrpc_reply_state, rs_exp_list);
569 struct ptlrpc_service *svc = rs->rs_service;
571 cfs_spin_lock(&svc->srv_lock);
572 cfs_list_del_init(&rs->rs_exp_list);
573 cfs_spin_lock(&rs->rs_lock);
574 ptlrpc_schedule_difficult_reply(rs);
575 cfs_spin_unlock(&rs->rs_lock);
576 cfs_spin_unlock(&svc->srv_lock);
578 cfs_spin_unlock(&exp->exp_lock);
580 /* release nid stat refererence */
581 lprocfs_exp_cleanup(exp);
586 /* --------------------------------------------------------------------------
587 * from old lib/target.c
588 * -------------------------------------------------------------------------- */
590 static int target_handle_reconnect(struct lustre_handle *conn,
591 struct obd_export *exp,
592 struct obd_uuid *cluuid)
595 if (exp->exp_connection && exp->exp_imp_reverse) {
596 struct lustre_handle *hdl;
597 hdl = &exp->exp_imp_reverse->imp_remote_handle;
598 /* Might be a re-connect after a partition. */
599 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
600 CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name,
602 conn->cookie = exp->exp_handle.h_cookie;
603 /* target_handle_connect() treats EALREADY and
604 * -EALREADY differently. EALREADY means we are
605 * doing a valid reconnect from the same client. */
608 CERROR("%s reconnecting from %s, "
609 "handle mismatch (ours "LPX64", theirs "
610 LPX64")\n", cluuid->uuid,
611 exp->exp_connection->c_remote_uuid.uuid,
612 hdl->cookie, conn->cookie);
613 memset(conn, 0, sizeof *conn);
614 /* target_handle_connect() treats EALREADY and
615 * -EALREADY differently. -EALREADY is an error
616 * (same UUID, different handle). */
621 conn->cookie = exp->exp_handle.h_cookie;
622 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
623 cluuid->uuid, exp, conn->cookie);
627 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
630 struct obd_export *exp = cb_data;
632 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
633 obd->obd_name, exp->exp_client_uuid.uuid);
635 cfs_spin_lock(&exp->exp_lock);
636 exp->exp_need_sync = 0;
637 cfs_spin_unlock(&exp->exp_lock);
638 class_export_cb_put(exp);
640 EXPORT_SYMBOL(target_client_add_cb);
643 target_start_and_reset_recovery_timer(struct obd_device *obd,
644 struct ptlrpc_request *req,
647 int target_handle_connect(struct ptlrpc_request *req)
649 struct obd_device *target, *targref = NULL;
650 struct obd_export *export = NULL;
651 struct obd_import *revimp;
652 struct lustre_handle conn;
653 struct lustre_handle *tmp;
654 struct obd_uuid tgtuuid;
655 struct obd_uuid cluuid;
656 struct obd_uuid remote_uuid;
660 struct obd_connect_data *data, *tmpdata;
661 lnet_nid_t *client_nid = NULL;
664 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
666 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
668 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
669 GOTO(out, rc = -EINVAL);
672 obd_str2uuid(&tgtuuid, str);
673 target = class_uuid2obd(&tgtuuid);
675 target = class_name2obd(str);
677 if (!target || target->obd_stopping || !target->obd_set_up) {
678 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available "
679 " for connect (%s)\n", str,
680 !target ? "no target" :
681 (target->obd_stopping ? "stopping" :
683 GOTO(out, rc = -ENODEV);
686 if (target->obd_no_conn) {
687 LCONSOLE_WARN("%s: temporarily refusing client connection "
688 "from %s\n", target->obd_name,
689 libcfs_nid2str(req->rq_peer.nid));
690 GOTO(out, rc = -EAGAIN);
693 /* Make sure the target isn't cleaned up while we're here. Yes,
694 there's still a race between the above check and our incref here.
695 Really, class_uuid2obd should take the ref. */
696 targref = class_incref(target, __FUNCTION__, cfs_current());
699 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
701 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
702 GOTO(out, rc = -EINVAL);
705 obd_str2uuid(&cluuid, str);
707 /* XXX extract a nettype and format accordingly */
708 switch (sizeof(lnet_nid_t)) {
709 /* NB the casts only avoid compiler warnings */
711 snprintf(remote_uuid.uuid, sizeof remote_uuid,
712 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
715 snprintf(remote_uuid.uuid, sizeof remote_uuid,
716 "NET_%x_UUID", (__u32)req->rq_peer.nid);
722 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
724 GOTO(out, rc = -EPROTO);
728 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
730 GOTO(out, rc = -EPROTO);
732 rc = req_capsule_server_pack(&req->rq_pill);
736 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
738 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
739 "libclient connection attempt");
740 GOTO(out, rc = -EPROTO);
741 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
742 LUSTRE_VERSION_ALLOWED_OFFSET ||
743 data->ocd_version > LUSTRE_VERSION_CODE +
744 LUSTRE_VERSION_ALLOWED_OFFSET) {
745 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
746 "libclient connection attempt",
747 data->ocd_version < LUSTRE_VERSION_CODE ?
749 OBD_OCD_VERSION_MAJOR(data->ocd_version),
750 OBD_OCD_VERSION_MINOR(data->ocd_version),
751 OBD_OCD_VERSION_PATCH(data->ocd_version),
752 OBD_OCD_VERSION_FIX(data->ocd_version));
753 data = req_capsule_server_sized_get(&req->rq_pill,
755 offsetof(typeof(*data), ocd_version) +
756 sizeof(data->ocd_version));
758 data->ocd_connect_flags = OBD_CONNECT_VERSION;
759 data->ocd_version = LUSTRE_VERSION_CODE;
761 GOTO(out, rc = -EPROTO);
765 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
766 (data->ocd_connect_flags & OBD_CONNECT_MDS))
769 /* lctl gets a backstage, all-access pass. */
770 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
771 goto dont_check_exports;
773 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
777 /* we've found an export in the hash */
778 if (export->exp_connecting) { /* bug 9635, et. al. */
779 CWARN("%s: exp %p already connecting\n",
780 export->exp_obd->obd_name, export);
781 class_export_put(export);
784 } else if (mds_conn && export->exp_connection) {
785 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
786 /* mds reconnected after failover */
787 CWARN("%s: received MDS connection from NID %s,"
788 " removing former export from NID %s\n",
789 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
790 libcfs_nid2str(export->exp_connection->c_peer.nid));
792 /* new mds connection from the same nid */
793 CWARN("%s: received new MDS connection from NID %s,"
794 " removing former export from same NID\n",
795 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
796 class_fail_export(export);
797 class_export_put(export);
800 } else if (export->exp_connection != NULL &&
801 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
802 (lustre_msg_get_op_flags(req->rq_reqmsg) &
803 MSG_CONNECT_INITIAL)) {
804 /* in mds failover we have static uuid but nid can be
806 CWARN("%s: cookie %s seen on new NID %s when "
807 "existing NID %s is already connected\n",
808 target->obd_name, cluuid.uuid,
809 libcfs_nid2str(req->rq_peer.nid),
810 libcfs_nid2str(export->exp_connection->c_peer.nid));
812 class_export_put(export);
815 cfs_spin_lock(&export->exp_lock);
816 export->exp_connecting = 1;
817 cfs_spin_unlock(&export->exp_lock);
818 class_export_put(export);
819 LASSERT(export->exp_obd == target);
821 rc = target_handle_reconnect(&conn, export, &cluuid);
824 /* If we found an export, we already unlocked. */
827 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
828 } else if (req->rq_export == NULL &&
829 cfs_atomic_read(&export->exp_rpc_count) > 0) {
830 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
831 target->obd_name, cluuid.uuid,
832 libcfs_nid2str(req->rq_peer.nid),
833 export, cfs_atomic_read(&export->exp_refcount));
834 GOTO(out, rc = -EBUSY);
835 } else if (req->rq_export != NULL &&
836 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
837 /* the current connect rpc has increased exp_rpc_count */
838 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
839 target->obd_name, cluuid.uuid,
840 libcfs_nid2str(req->rq_peer.nid),
841 export, cfs_atomic_read(&export->exp_rpc_count) - 1);
842 cfs_spin_lock(&export->exp_lock);
843 if (req->rq_export->exp_conn_cnt <
844 lustre_msg_get_conn_cnt(req->rq_reqmsg))
845 /* try to abort active requests */
846 req->rq_export->exp_abort_active_req = 1;
847 cfs_spin_unlock(&export->exp_lock);
848 GOTO(out, rc = -EBUSY);
849 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
850 CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; "
851 "cookies not random?\n", target->obd_name,
852 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid);
853 GOTO(out, rc = -EALREADY);
855 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
862 CWARN("%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
863 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
864 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
865 export, (long)cfs_time_current_sec(),
866 export ? (long)export->exp_last_request_time : 0);
868 /* Tell the client if we're in recovery. */
869 if (target->obd_recovering) {
870 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
871 /* If this is the first time a client connects,
872 reset the recovery timer */
874 target_start_and_reset_recovery_timer(target, req,
878 /* We want to handle EALREADY but *not* -EALREADY from
879 * target_handle_reconnect(), return reconnection state in a flag */
880 if (rc == EALREADY) {
881 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
887 /* Tell the client if we support replayable requests */
888 if (target->obd_replayable)
889 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
890 client_nid = &req->rq_peer.nid;
892 if (export == NULL) {
893 if (target->obd_recovering) {
896 t = cfs_timer_deadline(&target->obd_recovery_timer);
897 t = cfs_time_sub(t, cfs_time_current());
898 CERROR("%s: denying connection for new client %s (%s): "
899 "%d clients in recovery for "CFS_TIME_T"s\n",
901 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid,
902 cfs_atomic_read(&target-> \
903 obd_lock_replay_clients),
904 cfs_duration_sec(t));
908 rc = obd_connect(req->rq_svc_thread->t_env,
909 &export, target, &cluuid, data,
912 conn.cookie = export->exp_handle.h_cookie;
915 rc = obd_reconnect(req->rq_svc_thread->t_env,
916 export, target, &cluuid, data, client_nid);
918 /* prevous done via class_conn2export */
919 class_export_get(export);
923 /* Return only the parts of obd_connect_data that we understand, so the
924 * client knows that we don't understand the rest. */
926 tmpdata = req_capsule_server_get(&req->rq_pill,
928 //data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED;
932 /* If all else goes well, this is our RPC return code. */
935 lustre_msg_set_handle(req->rq_repmsg, &conn);
937 /* If the client and the server are the same node, we will already
938 * have an export that really points to the client's DLM export,
939 * because we have a shared handles table.
941 * XXX this will go away when shaver stops sending the "connect" handle
942 * in the real "remote handle" field of the request --phik 24 Apr 2003
944 if (req->rq_export != NULL)
945 class_export_put(req->rq_export);
947 req->rq_export = export;
949 cfs_spin_lock(&export->exp_lock);
950 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
951 cfs_spin_unlock(&export->exp_lock);
952 CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n",
953 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
954 export->exp_conn_cnt,
955 lustre_msg_get_conn_cnt(req->rq_reqmsg));
957 GOTO(out, rc = -EALREADY);
959 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
960 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
961 export->exp_abort_active_req = 0;
963 /* request from liblustre? Don't evict it for not pinging. */
964 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
965 export->exp_libclient = 1;
966 cfs_spin_unlock(&export->exp_lock);
968 cfs_spin_lock(&target->obd_dev_lock);
969 cfs_list_del_init(&export->exp_obd_chain_timed);
970 cfs_spin_unlock(&target->obd_dev_lock);
972 cfs_spin_unlock(&export->exp_lock);
975 if (export->exp_connection != NULL) {
976 /* Check to see if connection came from another NID */
977 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
978 !cfs_hlist_unhashed(&export->exp_nid_hash))
979 cfs_hash_del(export->exp_obd->obd_nid_hash,
980 &export->exp_connection->c_peer.nid,
981 &export->exp_nid_hash);
983 ptlrpc_connection_put(export->exp_connection);
986 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
989 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
990 cfs_hash_add_unique(export->exp_obd->obd_nid_hash,
991 &export->exp_connection->c_peer.nid,
992 &export->exp_nid_hash);
995 cfs_spin_lock_bh(&target->obd_processing_task_lock);
996 if (target->obd_recovering && !export->exp_in_recovery) {
997 cfs_spin_lock(&export->exp_lock);
998 export->exp_in_recovery = 1;
999 export->exp_req_replay_needed = 1;
1000 export->exp_lock_replay_needed = 1;
1001 cfs_spin_unlock(&export->exp_lock);
1002 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
1003 && (data->ocd_transno == 0))
1004 CWARN("Connect with zero transno!\n");
1006 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
1007 && data->ocd_transno < target->obd_next_recovery_transno)
1008 target->obd_next_recovery_transno = data->ocd_transno;
1009 target->obd_connected_clients++;
1010 cfs_atomic_inc(&target->obd_req_replay_clients);
1011 cfs_atomic_inc(&target->obd_lock_replay_clients);
1012 if (target->obd_connected_clients ==
1013 target->obd_max_recoverable_clients)
1014 cfs_waitq_signal(&target->obd_next_transno_waitq);
1016 cfs_spin_unlock_bh(&target->obd_processing_task_lock);
1017 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1020 if (export->exp_imp_reverse != NULL) {
1021 /* destroyed import can be still referenced in ctxt */
1022 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
1023 KEY_REVIMP_UPD, 0, NULL, NULL);
1025 client_destroy_import(export->exp_imp_reverse);
1028 /* for the rest part, we return -ENOTCONN in case of errors
1029 * in order to let client initialize connection again.
1031 revimp = export->exp_imp_reverse = class_new_import(target);
1033 CERROR("fail to alloc new reverse import.\n");
1034 GOTO(out, rc = -ENOTCONN);
1037 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1038 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1039 revimp->imp_remote_handle = conn;
1040 revimp->imp_dlm_fake = 1;
1041 revimp->imp_state = LUSTRE_IMP_FULL;
1043 /* unknown versions will be caught in
1044 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
1045 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1047 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
1048 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1049 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1051 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1053 if ((export->exp_connect_flags & OBD_CONNECT_FULL20) &&
1054 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1055 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1057 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1059 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1061 CERROR("Failed to get sec for reverse import: %d\n", rc);
1062 export->exp_imp_reverse = NULL;
1063 class_destroy_import(revimp);
1066 class_import_put(revimp);
1069 cfs_spin_lock(&export->exp_lock);
1070 export->exp_connecting = 0;
1071 cfs_spin_unlock(&export->exp_lock);
1074 class_decref(targref, __FUNCTION__, cfs_current());
1076 req->rq_status = rc;
1080 int target_handle_disconnect(struct ptlrpc_request *req)
1085 rc = req_capsule_server_pack(&req->rq_pill);
1089 /* keep the rq_export around so we can send the reply */
1090 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1095 void target_destroy_export(struct obd_export *exp)
1097 /* exports created from last_rcvd data, and "fake"
1098 exports created by lctl don't have an import */
1099 if (exp->exp_imp_reverse != NULL)
1100 client_destroy_import(exp->exp_imp_reverse);
1102 LASSERT(cfs_atomic_read(&exp->exp_locks_count) == 0);
1103 LASSERT(cfs_atomic_read(&exp->exp_rpc_count) == 0);
1104 LASSERT(cfs_atomic_read(&exp->exp_cb_count) == 0);
1105 LASSERT(cfs_atomic_read(&exp->exp_replay_count) == 0);
1109 * Recovery functions
1111 static void target_request_copy_get(struct ptlrpc_request *req)
1113 class_export_rpc_get(req->rq_export);
1114 LASSERT(cfs_list_empty(&req->rq_list));
1115 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1116 /* increase refcount to keep request in queue */
1117 LASSERT(cfs_atomic_read(&req->rq_refcount));
1118 cfs_atomic_inc(&req->rq_refcount);
1119 /** let export know it has replays to be handled */
1120 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1121 /* release service thread while request is queued
1122 * we are moving the request from active processing
1123 * to waiting on the replay queue */
1124 ptlrpc_server_active_request_dec(req);
1127 static void target_request_copy_put(struct ptlrpc_request *req)
1129 LASSERT(cfs_list_empty(&req->rq_replay_list));
1130 LASSERT(cfs_atomic_read(&req->rq_export->exp_replay_count) > 0);
1131 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1132 class_export_rpc_put(req->rq_export);
1133 /* ptlrpc_server_drop_request() assumes the request is active */
1134 ptlrpc_server_active_request_inc(req);
1135 ptlrpc_server_drop_request(req);
1138 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1140 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1141 struct obd_export *exp = req->rq_export;
1142 struct ptlrpc_request *reqiter;
1147 cfs_spin_lock(&exp->exp_lock);
1148 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1150 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1157 /* we expect it with RESENT and REPLAY flags */
1158 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1159 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1160 CERROR("invalid flags %x of resent replay\n",
1161 lustre_msg_get_flags(req->rq_reqmsg));
1163 cfs_list_add_tail(&req->rq_replay_list,
1164 &exp->exp_req_replay_queue);
1167 cfs_spin_unlock(&exp->exp_lock);
1171 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1173 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1174 LASSERT(req->rq_export);
1176 cfs_spin_lock(&req->rq_export->exp_lock);
1177 cfs_list_del_init(&req->rq_replay_list);
1178 cfs_spin_unlock(&req->rq_export->exp_lock);
1182 static void target_finish_recovery(struct obd_device *obd)
1185 LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n",
1188 ldlm_reprocess_all_ns(obd->obd_namespace);
1189 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1190 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1191 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1192 !cfs_list_empty(&obd->obd_final_req_queue)) {
1193 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1195 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1196 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1198 cfs_list_empty(&obd->obd_final_req_queue) ? \
1200 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1203 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1205 obd->obd_recovery_end = cfs_time_current_sec();
1207 /* when recovery finished, cleanup orphans on mds and ost */
1208 if (OBT(obd) && OBP(obd, postrecov)) {
1209 int rc = OBP(obd, postrecov)(obd);
1211 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1217 static void abort_req_replay_queue(struct obd_device *obd)
1219 struct ptlrpc_request *req, *n;
1220 cfs_list_t abort_list;
1222 CFS_INIT_LIST_HEAD(&abort_list);
1223 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1224 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1225 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1226 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1227 DEBUG_REQ(D_WARNING, req, "aborted:");
1228 req->rq_status = -ENOTCONN;
1229 if (ptlrpc_error(req)) {
1230 DEBUG_REQ(D_ERROR, req,
1231 "failed abort_req_reply; skipping");
1233 target_exp_dequeue_req_replay(req);
1234 target_request_copy_put(req);
1238 static void abort_lock_replay_queue(struct obd_device *obd)
1240 struct ptlrpc_request *req, *n;
1241 cfs_list_t abort_list;
1243 CFS_INIT_LIST_HEAD(&abort_list);
1244 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1245 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1246 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1247 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1248 DEBUG_REQ(D_ERROR, req, "aborted:");
1249 req->rq_status = -ENOTCONN;
1250 if (ptlrpc_error(req)) {
1251 DEBUG_REQ(D_ERROR, req,
1252 "failed abort_lock_reply; skipping");
1254 target_request_copy_put(req);
1259 /* Called from a cleanup function if the device is being cleaned up
1260 forcefully. The exports should all have been disconnected already,
1261 the only thing left to do is
1262 - clear the recovery flags
1264 - free queued requests and replies, but don't send replies
1265 Because the obd_stopping flag is set, no new requests should be received.
1268 void target_cleanup_recovery(struct obd_device *obd)
1270 struct ptlrpc_request *req, *n;
1271 cfs_list_t clean_list;
1274 CFS_INIT_LIST_HEAD(&clean_list);
1275 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1276 if (!obd->obd_recovering) {
1277 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1281 obd->obd_recovering = obd->obd_abort_recovery = 0;
1282 target_cancel_recovery_timer(obd);
1284 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1285 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1287 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1288 LASSERT(req->rq_reply_state == 0);
1289 target_exp_dequeue_req_replay(req);
1290 target_request_copy_put(req);
1293 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1294 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1295 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1296 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1298 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1299 LASSERT(req->rq_reply_state == 0);
1300 target_request_copy_put(req);
1306 /* obd_processing_task_lock should be held */
1307 void target_cancel_recovery_timer(struct obd_device *obd)
1309 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1310 cfs_timer_disarm(&obd->obd_recovery_timer);
1313 /* extend = 1 means require at least "duration" seconds left in the timer,
1314 extend = 0 means set the total duration (start_recovery_timer) */
1315 static void reset_recovery_timer(struct obd_device *obd, int duration,
1318 cfs_time_t now = cfs_time_current_sec();
1319 cfs_duration_t left;
1321 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1322 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1323 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1327 left = cfs_time_sub(obd->obd_recovery_end, now);
1329 if (extend && (duration > left))
1330 obd->obd_recovery_timeout += duration - left;
1331 else if (!extend && (duration > obd->obd_recovery_timeout))
1332 /* Track the client's largest expected replay time */
1333 obd->obd_recovery_timeout = duration;
1335 /* Hard limit of obd_recovery_time_hard which should not happen */
1336 if (obd->obd_recovery_timeout > obd->obd_recovery_time_hard)
1337 obd->obd_recovery_timeout = obd->obd_recovery_time_hard;
1339 obd->obd_recovery_end = obd->obd_recovery_start +
1340 obd->obd_recovery_timeout;
1341 if (!cfs_timer_is_armed(&obd->obd_recovery_timer) ||
1342 cfs_time_before(now, obd->obd_recovery_end)) {
1343 left = cfs_time_sub(obd->obd_recovery_end, now);
1344 cfs_timer_arm(&obd->obd_recovery_timer, cfs_time_shift(left));
1346 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1347 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1348 obd->obd_name, (unsigned)left);
1351 static void check_and_start_recovery_timer(struct obd_device *obd)
1353 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1354 if (cfs_timer_is_armed(&obd->obd_recovery_timer)) {
1355 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1358 CDEBUG(D_HA, "%s: starting recovery timer\n", obd->obd_name);
1359 obd->obd_recovery_start = cfs_time_current_sec();
1360 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1362 reset_recovery_timer(obd, obd->obd_recovery_timeout, 0);
1365 /* Reset the timer with each new client connection */
1367 * This timer is actually reconnect_timer, which is for making sure
1368 * the total recovery window is at least as big as my reconnect
1369 * attempt timing. So the initial recovery time_out will be set to
1370 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1371 * from client is bigger than this, then the recovery time_out will
1372 * be extended to make sure the client could be reconnected, in the
1373 * process, the timeout from the new client should be ignored.
1377 target_start_and_reset_recovery_timer(struct obd_device *obd,
1378 struct ptlrpc_request *req,
1381 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1383 if (!new_client && service_time)
1384 /* Teach server about old server's estimates, as first guess
1385 * at how long new requests will take. */
1386 at_measured(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1389 check_and_start_recovery_timer(obd);
1391 /* convert the service time to rpc timeout,
1392 * reuse service_time to limit stack usage */
1393 service_time = at_est2timeout(service_time);
1395 /* We expect other clients to timeout within service_time, then try
1396 * to reconnect, then try the failover server. The max delay between
1397 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */
1398 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC +
1399 INITIAL_CONNECT_TIMEOUT);
1400 if (service_time > obd->obd_recovery_timeout && !new_client)
1401 reset_recovery_timer(obd, service_time, 0);
1406 /** Health checking routines */
1407 static inline int exp_connect_healthy(struct obd_export *exp)
1409 return (exp->exp_in_recovery);
1412 /** if export done req_replay or has replay in queue */
1413 static inline int exp_req_replay_healthy(struct obd_export *exp)
1415 return (!exp->exp_req_replay_needed ||
1416 cfs_atomic_read(&exp->exp_replay_count) > 0);
1418 /** if export done lock_replay or has replay in queue */
1419 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1421 return (!exp->exp_lock_replay_needed ||
1422 cfs_atomic_read(&exp->exp_replay_count) > 0);
1425 static inline int exp_vbr_healthy(struct obd_export *exp)
1427 return (!exp->exp_vbr_failed);
1430 static inline int exp_finished(struct obd_export *exp)
1432 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1435 /** Checking routines for recovery */
1436 static int check_for_clients(struct obd_device *obd)
1438 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1440 LASSERT(obd->obd_connected_clients <= obd->obd_max_recoverable_clients);
1441 if (obd->obd_no_conn == 0 &&
1442 obd->obd_connected_clients + obd->obd_stale_clients ==
1443 obd->obd_max_recoverable_clients)
1448 static int check_for_next_transno(struct obd_device *obd)
1450 struct ptlrpc_request *req = NULL;
1451 int wake_up = 0, connected, completed, queue_len;
1452 __u64 next_transno, req_transno;
1454 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1456 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1457 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1458 struct ptlrpc_request, rq_list);
1459 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1464 connected = obd->obd_connected_clients;
1465 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1466 queue_len = obd->obd_requests_queued_for_recovery;
1467 next_transno = obd->obd_next_recovery_transno;
1469 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1470 "req_transno: "LPU64", next_transno: "LPU64"\n",
1471 obd->obd_max_recoverable_clients, connected, completed,
1472 queue_len, req_transno, next_transno);
1474 if (obd->obd_abort_recovery) {
1475 CDEBUG(D_HA, "waking for aborted recovery\n");
1477 } else if (obd->obd_recovery_expired) {
1478 CDEBUG(D_HA, "waking for expired recovery\n");
1480 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1481 CDEBUG(D_HA, "waking for completed recovery\n");
1483 } else if (req_transno == next_transno) {
1484 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1486 } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1488 /** handle gaps occured due to lost reply or VBR */
1489 LASSERTF(req_transno >= next_transno,
1490 "req_transno: "LPU64", next_transno: "LPU64"\n",
1491 req_transno, next_transno);
1492 if (req_transno > obd->obd_last_committed &&
1493 !obd->obd_version_recov)
1496 "%s: waking for gap in transno, VBR is %s (skip: "
1497 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1498 ", last_committed: "LPD64")\n",
1499 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1500 next_transno, queue_len, completed, connected,
1501 req_transno, obd->obd_last_committed);
1502 obd->obd_next_recovery_transno = req_transno;
1504 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1505 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1506 " by fail_lock, waking up ("LPD64")\n", next_transno);
1507 obd->obd_next_recovery_transno = req_transno;
1510 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1514 static int check_for_next_lock(struct obd_device *obd)
1518 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1519 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1520 CDEBUG(D_HA, "waking for next lock\n");
1522 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1523 CDEBUG(D_HA, "waking for completed lock replay\n");
1525 } else if (obd->obd_abort_recovery) {
1526 CDEBUG(D_HA, "waking for aborted recovery\n");
1528 } else if (obd->obd_recovery_expired) {
1529 CDEBUG(D_HA, "waking for expired recovery\n");
1532 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1538 * wait for recovery events,
1539 * check its status with help of check_routine
1540 * evict dead clients via health_check
1542 static int target_recovery_overseer(struct obd_device *obd,
1543 int (*check_routine)(struct obd_device *),
1544 int (*health_check)(struct obd_export *))
1546 int abort = 0, expired = 1;
1549 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1550 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1551 abort = obd->obd_abort_recovery;
1552 expired = obd->obd_recovery_expired;
1553 obd->obd_recovery_expired = 0;
1554 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1556 CWARN("recovery is aborted, evict exports in recovery\n");
1557 /** evict exports which didn't finish recovery yet */
1558 class_disconnect_stale_exports(obd, exp_finished);
1559 } else if (expired) {
1560 /** If some clients died being recovered, evict them */
1561 CDEBUG(D_WARNING, "recovery is timed out, evict stale exports\n");
1562 /** evict cexports with no replay in queue, they are stalled */
1563 class_disconnect_stale_exports(obd, health_check);
1564 /** continue with VBR */
1565 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1566 obd->obd_version_recov = 1;
1567 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1569 * reset timer, recovery will proceed with versions now,
1570 * timeout is set just to handle reconnection delays
1572 reset_recovery_timer(obd, RECONNECT_DELAY_MAX, 1);
1573 /** Wait for recovery events again, after evicting bad clients */
1575 } while (!abort && expired);
1580 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1582 struct ptlrpc_request *req = NULL;
1585 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1586 obd->obd_next_recovery_transno);
1588 if (target_recovery_overseer(obd, check_for_next_transno,
1589 exp_req_replay_healthy)) {
1590 abort_req_replay_queue(obd);
1591 abort_lock_replay_queue(obd);
1594 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1595 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1596 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1597 struct ptlrpc_request, rq_list);
1598 cfs_list_del_init(&req->rq_list);
1599 obd->obd_requests_queued_for_recovery--;
1600 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1602 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1603 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1604 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1605 /** evict exports failed VBR */
1606 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1611 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1613 struct ptlrpc_request *req = NULL;
1615 CDEBUG(D_HA, "Waiting for lock\n");
1616 if (target_recovery_overseer(obd, check_for_next_lock,
1617 exp_lock_replay_healthy))
1618 abort_lock_replay_queue(obd);
1620 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1621 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1622 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1623 struct ptlrpc_request, rq_list);
1624 cfs_list_del_init(&req->rq_list);
1625 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1627 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1628 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1629 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1630 /** evict exports failed VBR */
1631 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1636 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1638 struct ptlrpc_request *req = NULL;
1640 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1641 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1642 req = cfs_list_entry(obd->obd_final_req_queue.next,
1643 struct ptlrpc_request, rq_list);
1644 cfs_list_del_init(&req->rq_list);
1645 if (req->rq_export->exp_in_recovery) {
1646 cfs_spin_lock(&req->rq_export->exp_lock);
1647 req->rq_export->exp_in_recovery = 0;
1648 cfs_spin_unlock(&req->rq_export->exp_lock);
1651 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1655 static int handle_recovery_req(struct ptlrpc_thread *thread,
1656 struct ptlrpc_request *req,
1657 svc_handler_t handler)
1662 rc = lu_context_init(&req->rq_recov_session, LCT_SESSION);
1664 CERROR("Failure to initialize session: %d\n", rc);
1665 GOTO(reqcopy_put, rc);
1668 * export can be evicted during recovery, no need to handle replays for
1669 * it after that, discard such request silently
1671 if (req->rq_export->exp_disconnected)
1672 GOTO(reqcopy_put, rc);
1674 req->rq_recov_session.lc_thread = thread;
1675 lu_context_enter(&req->rq_recov_session);
1676 req->rq_svc_thread = thread;
1677 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1679 /* thread context */
1680 lu_context_enter(&thread->t_env->le_ctx);
1682 lu_context_exit(&thread->t_env->le_ctx);
1684 lu_context_exit(&req->rq_recov_session);
1685 lu_context_fini(&req->rq_recov_session);
1686 /* don't reset timer for final stage */
1687 if (!exp_finished(req->rq_export)) {
1689 * Add request timeout to the recovery time so next request from
1690 * this client may come in recovery time
1692 reset_recovery_timer(class_exp2obd(req->rq_export),
1693 AT_OFF ? obd_timeout :
1694 lustre_msg_get_timeout(req->rq_reqmsg), 1);
1700 static int target_recovery_thread(void *arg)
1702 struct lu_target *lut = arg;
1703 struct obd_device *obd = lut->lut_obd;
1704 struct ptlrpc_request *req;
1705 struct target_recovery_data *trd = &obd->obd_recovery_data;
1706 unsigned long delta;
1707 unsigned long flags;
1709 struct ptlrpc_thread fake_svc_thread, *thread = &fake_svc_thread;
1713 cfs_daemonize_ctxt("tgt_recov");
1715 SIGNAL_MASK_LOCK(current, flags);
1716 sigfillset(¤t->blocked);
1718 SIGNAL_MASK_UNLOCK(current, flags);
1720 rc = lu_context_init(&env.le_ctx, LCT_MD_THREAD);
1724 thread->t_env = &env;
1725 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1726 env.le_ctx.lc_thread = thread;
1727 thread->t_data = NULL;
1729 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
1731 trd->trd_processing_task = cfs_curproc_pid();
1733 obd->obd_recovering = 1;
1734 cfs_complete(&trd->trd_starting);
1736 /* first of all, we have to know the first transno to replay */
1737 if (target_recovery_overseer(obd, check_for_clients,
1738 exp_connect_healthy)) {
1739 abort_req_replay_queue(obd);
1740 abort_lock_replay_queue(obd);
1743 /* next stage: replay requests */
1745 obd->obd_req_replaying = 1;
1746 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1747 cfs_atomic_read(&obd->obd_req_replay_clients),
1748 obd->obd_next_recovery_transno);
1749 while ((req = target_next_replay_req(obd))) {
1750 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1751 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1752 lustre_msg_get_transno(req->rq_reqmsg),
1753 libcfs_nid2str(req->rq_peer.nid));
1754 handle_recovery_req(thread, req,
1755 trd->trd_recovery_handler);
1757 * bz18031: increase next_recovery_transno before
1758 * target_request_copy_put() will drop exp_rpc reference
1760 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1761 obd->obd_next_recovery_transno++;
1762 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1763 target_exp_dequeue_req_replay(req);
1764 target_request_copy_put(req);
1765 obd->obd_replayed_requests++;
1769 * The second stage: replay locks
1771 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1772 cfs_atomic_read(&obd->obd_lock_replay_clients));
1773 while ((req = target_next_replay_lock(obd))) {
1774 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1775 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
1776 libcfs_nid2str(req->rq_peer.nid));
1777 handle_recovery_req(thread, req,
1778 trd->trd_recovery_handler);
1779 target_request_copy_put(req);
1780 obd->obd_replayed_locks++;
1784 * The third stage: reply on final pings, at this moment all clients
1785 * must have request in final queue
1787 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1788 /** Update server last boot epoch */
1789 lut_boot_epoch_update(lut);
1790 /* We drop recoverying flag to forward all new requests
1791 * to regular mds_handle() since now */
1792 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1793 obd->obd_recovering = obd->obd_abort_recovery = 0;
1794 target_cancel_recovery_timer(obd);
1795 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1796 while ((req = target_next_final_ping(obd))) {
1797 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1798 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1799 libcfs_nid2str(req->rq_peer.nid));
1800 handle_recovery_req(thread, req,
1801 trd->trd_recovery_handler);
1802 target_request_copy_put(req);
1805 delta = (jiffies - delta) / CFS_HZ;
1806 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1807 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1808 if (delta > OBD_RECOVERY_TIME_SOFT) {
1809 CWARN("too long recovery - read logs\n");
1810 libcfs_debug_dumplog();
1813 target_finish_recovery(obd);
1815 lu_context_fini(&env.le_ctx);
1816 trd->trd_processing_task = 0;
1817 cfs_complete(&trd->trd_finishing);
1821 static int target_start_recovery_thread(struct lu_target *lut,
1822 svc_handler_t handler)
1824 struct obd_device *obd = lut->lut_obd;
1826 struct target_recovery_data *trd = &obd->obd_recovery_data;
1828 memset(trd, 0, sizeof(*trd));
1829 cfs_init_completion(&trd->trd_starting);
1830 cfs_init_completion(&trd->trd_finishing);
1831 trd->trd_recovery_handler = handler;
1833 if (cfs_kernel_thread(target_recovery_thread, lut, 0) > 0) {
1834 cfs_wait_for_completion(&trd->trd_starting);
1835 LASSERT(obd->obd_recovering != 0);
1842 void target_stop_recovery_thread(struct obd_device *obd)
1844 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1845 if (obd->obd_recovery_data.trd_processing_task > 0) {
1846 struct target_recovery_data *trd = &obd->obd_recovery_data;
1847 /** recovery can be done but postrecovery is not yet */
1848 if (obd->obd_recovering) {
1849 CERROR("%s: Aborting recovery\n", obd->obd_name);
1850 obd->obd_abort_recovery = 1;
1851 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1853 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1854 cfs_wait_for_completion(&trd->trd_finishing);
1856 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1860 void target_recovery_fini(struct obd_device *obd)
1862 class_disconnect_exports(obd);
1863 target_stop_recovery_thread(obd);
1864 target_cleanup_recovery(obd);
1866 EXPORT_SYMBOL(target_recovery_fini);
1868 static void target_recovery_expired(unsigned long castmeharder)
1870 struct obd_device *obd = (struct obd_device *)castmeharder;
1871 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
1872 " after %lds (%d clients connected)\n",
1873 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
1874 cfs_time_current_sec()- obd->obd_recovery_start,
1875 obd->obd_connected_clients);
1877 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1878 obd->obd_recovery_expired = 1;
1879 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1880 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1883 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
1885 struct obd_device *obd = lut->lut_obd;
1886 if (obd->obd_max_recoverable_clients == 0) {
1887 /** Update server last boot epoch */
1888 lut_boot_epoch_update(lut);
1892 CWARN("RECOVERY: service %s, %d recoverable clients, "
1893 "last_transno "LPU64"\n", obd->obd_name,
1894 obd->obd_max_recoverable_clients, obd->obd_last_committed);
1895 LASSERT(obd->obd_stopping == 0);
1896 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
1897 obd->obd_recovery_start = 0;
1898 obd->obd_recovery_end = 0;
1900 /* both values can be get from mount data already */
1901 if (obd->obd_recovery_timeout == 0)
1902 obd->obd_recovery_timeout = OBD_RECOVERY_TIME_SOFT;
1903 if (obd->obd_recovery_time_hard == 0)
1904 obd->obd_recovery_time_hard = OBD_RECOVERY_TIME_HARD;
1905 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
1906 target_start_recovery_thread(lut, handler);
1908 EXPORT_SYMBOL(target_recovery_init);
1912 static int target_process_req_flags(struct obd_device *obd,
1913 struct ptlrpc_request *req)
1915 struct obd_export *exp = req->rq_export;
1916 LASSERT(exp != NULL);
1917 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1918 /* client declares he's ready to replay locks */
1919 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1920 if (exp->exp_req_replay_needed) {
1921 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) >
1923 cfs_spin_lock(&exp->exp_lock);
1924 exp->exp_req_replay_needed = 0;
1925 cfs_spin_unlock(&exp->exp_lock);
1926 cfs_atomic_dec(&obd->obd_req_replay_clients);
1928 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1930 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1931 /* client declares he's ready to complete recovery
1932 * so, we put the request on th final queue */
1933 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1934 if (exp->exp_lock_replay_needed) {
1935 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) >
1937 cfs_spin_lock(&exp->exp_lock);
1938 exp->exp_lock_replay_needed = 0;
1939 cfs_spin_unlock(&exp->exp_lock);
1940 cfs_atomic_dec(&obd->obd_lock_replay_clients);
1942 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1948 int target_queue_recovery_request(struct ptlrpc_request *req,
1949 struct obd_device *obd)
1953 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1956 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
1957 /* Processing the queue right now, don't re-add. */
1961 target_process_req_flags(obd, req);
1963 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1964 /* client declares he's ready to complete recovery
1965 * so, we put the request on th final queue */
1966 target_request_copy_get(req);
1967 DEBUG_REQ(D_HA, req, "queue final req");
1968 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1969 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1970 if (obd->obd_recovering) {
1971 cfs_list_add_tail(&req->rq_list,
1972 &obd->obd_final_req_queue);
1974 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1975 target_request_copy_put(req);
1976 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
1978 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1981 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1982 /* client declares he's ready to replay locks */
1983 target_request_copy_get(req);
1984 DEBUG_REQ(D_HA, req, "queue lock replay req");
1985 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
1986 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1987 LASSERT(obd->obd_recovering);
1988 /* usually due to recovery abort */
1989 if (!req->rq_export->exp_in_recovery) {
1990 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
1991 target_request_copy_put(req);
1994 LASSERT(req->rq_export->exp_lock_replay_needed);
1995 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
1996 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2000 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2001 * (i.e. buflens etc are in my own byte order), but type-dependent
2002 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
2005 CFS_INIT_LIST_HEAD(&req->rq_list);
2006 DEBUG_REQ(D_HA, req, "not queueing");
2010 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
2012 /* If we're processing the queue, we want don't want to queue this
2015 * Also, if this request has a transno less than the one we're waiting
2016 * for, we should process it now. It could (and currently always will)
2017 * be an open request for a descriptor that was opened some time ago.
2019 * Also, a resent, replayed request that has already been
2020 * handled will pass through here and be processed immediately.
2022 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying: %i\n",
2023 obd->obd_next_recovery_transno, transno, obd->obd_req_replaying);
2024 if (transno < obd->obd_next_recovery_transno && obd->obd_req_replaying) {
2025 /* Processing the queue right now, don't re-add. */
2026 LASSERT(cfs_list_empty(&req->rq_list));
2027 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2030 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2032 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2035 target_request_copy_get(req);
2036 cfs_spin_lock_bh(&obd->obd_processing_task_lock);
2037 LASSERT(obd->obd_recovering);
2038 if (!req->rq_export->exp_in_recovery) {
2039 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2040 target_request_copy_put(req);
2043 LASSERT(req->rq_export->exp_req_replay_needed);
2045 if (target_exp_enqueue_req_replay(req)) {
2046 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2047 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2048 target_request_copy_put(req);
2053 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2054 struct ptlrpc_request *reqiter =
2055 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2057 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2058 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2063 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2065 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2066 "has been claimed by another client");
2067 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2068 target_exp_dequeue_req_replay(req);
2069 target_request_copy_put(req);
2075 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2077 obd->obd_requests_queued_for_recovery++;
2078 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2079 cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
2084 * Packs current SLV and Limit into \a req.
2086 int target_pack_pool_reply(struct ptlrpc_request *req)
2088 struct obd_device *obd;
2092 * Check that we still have all structures alive as this may
2093 * be some late rpc in shutdown time.
2095 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2096 !exp_connect_lru_resize(req->rq_export))) {
2097 lustre_msg_set_slv(req->rq_repmsg, 0);
2098 lustre_msg_set_limit(req->rq_repmsg, 0);
2103 * OBD is alive here as export is alive, which we checked above.
2105 obd = req->rq_export->exp_obd;
2107 cfs_read_lock(&obd->obd_pool_lock);
2108 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2109 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2110 cfs_read_unlock(&obd->obd_pool_lock);
2115 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2117 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2118 DEBUG_REQ(D_ERROR, req, "dropping reply");
2123 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
2124 req->rq_status = rc;
2125 return (ptlrpc_send_error(req, 1));
2127 DEBUG_REQ(D_NET, req, "sending reply");
2130 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2133 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2136 struct ptlrpc_reply_state *rs;
2137 struct obd_device *obd;
2138 struct obd_export *exp;
2139 struct ptlrpc_service *svc;
2142 if (req->rq_no_reply) {
2147 svc = req->rq_rqbd->rqbd_service;
2148 rs = req->rq_reply_state;
2149 if (rs == NULL || !rs->rs_difficult) {
2151 target_send_reply_msg (req, rc, fail_id);
2156 /* must be an export if locks saved */
2157 LASSERT (req->rq_export != NULL);
2158 /* req/reply consistent */
2159 LASSERT (rs->rs_service == svc);
2162 LASSERT (!rs->rs_scheduled);
2163 LASSERT (!rs->rs_scheduled_ever);
2164 LASSERT (!rs->rs_handled);
2165 LASSERT (!rs->rs_on_net);
2166 LASSERT (rs->rs_export == NULL);
2167 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2168 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2170 exp = class_export_get (req->rq_export);
2173 /* disable reply scheduling while I'm setting up */
2174 rs->rs_scheduled = 1;
2176 rs->rs_xid = req->rq_xid;
2177 rs->rs_transno = req->rq_transno;
2178 rs->rs_export = exp;
2179 rs->rs_opc = lustre_msg_get_opc(rs->rs_msg);
2181 cfs_spin_lock(&exp->exp_uncommitted_replies_lock);
2182 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2183 rs->rs_transno, exp->exp_last_committed);
2184 if (rs->rs_transno > exp->exp_last_committed) {
2185 /* not committed already */
2186 cfs_list_add_tail(&rs->rs_obd_list,
2187 &exp->exp_uncommitted_replies);
2189 cfs_spin_unlock (&exp->exp_uncommitted_replies_lock);
2191 cfs_spin_lock(&exp->exp_lock);
2192 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2193 cfs_spin_unlock(&exp->exp_lock);
2195 netrc = target_send_reply_msg (req, rc, fail_id);
2197 cfs_spin_lock(&svc->srv_lock);
2199 cfs_atomic_inc(&svc->srv_n_difficult_replies);
2202 /* error sending: reply is off the net. Also we need +1
2203 * reply ref until ptlrpc_handle_rs() is done
2204 * with the reply state (if the send was successful, there
2205 * would have been +1 ref for the net, which
2206 * reply_out_callback leaves alone) */
2208 ptlrpc_rs_addref(rs);
2209 cfs_atomic_inc (&svc->srv_outstanding_replies);
2212 cfs_spin_lock(&rs->rs_lock);
2213 if (rs->rs_transno <= exp->exp_last_committed ||
2214 (!rs->rs_on_net && !rs->rs_no_ack) ||
2215 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2216 cfs_list_empty(&rs->rs_obd_list)) {
2217 CDEBUG(D_HA, "Schedule reply immediately\n");
2218 ptlrpc_dispatch_difficult_reply(rs);
2220 cfs_list_add (&rs->rs_list, &svc->srv_active_replies);
2221 rs->rs_scheduled = 0; /* allow notifier to schedule */
2223 cfs_spin_unlock(&rs->rs_lock);
2224 cfs_spin_unlock(&svc->srv_lock);
2228 int target_handle_ping(struct ptlrpc_request *req)
2230 obd_ping(req->rq_export);
2231 return req_capsule_server_pack(&req->rq_pill);
2234 void target_committed_to_req(struct ptlrpc_request *req)
2236 struct obd_export *exp = req->rq_export;
2238 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2239 lustre_msg_set_last_committed(req->rq_repmsg,
2240 exp->exp_last_committed);
2242 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2243 "%d)", exp->exp_obd->obd_no_transno,
2244 req->rq_repmsg == NULL);
2246 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2247 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2249 EXPORT_SYMBOL(target_committed_to_req);
2251 int target_handle_qc_callback(struct ptlrpc_request *req)
2253 struct obd_quotactl *oqctl;
2254 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2256 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2257 if (oqctl == NULL) {
2258 CERROR("Can't unpack obd_quotactl\n");
2262 cli->cl_qchk_stat = oqctl->qc_stat;
2267 #ifdef HAVE_QUOTA_SUPPORT
2268 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2271 struct obd_device *obd = req->rq_export->exp_obd;
2272 struct obd_device *master_obd = NULL, *lov_obd = NULL;
2273 struct obd_device_target *obt;
2274 struct lustre_quota_ctxt *qctxt;
2275 struct qunit_data *qdata = NULL;
2279 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2282 rc = req_capsule_server_pack(&req->rq_pill);
2284 CERROR("packing reply failed!: rc = %d\n", rc);
2288 LASSERT(req->rq_export);
2290 qdata = quota_get_qdata(req, QUOTA_REQUEST, QUOTA_EXPORT);
2291 if (IS_ERR(qdata)) {
2292 rc = PTR_ERR(qdata);
2293 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2294 req->rq_status = rc;
2298 /* we use the observer */
2299 if (obd_pin_observer(obd, &lov_obd) ||
2300 obd_pin_observer(lov_obd, &master_obd)) {
2301 CERROR("Can't find the observer, it is recovering\n");
2302 req->rq_status = -EAGAIN;
2306 obt = &master_obd->u.obt;
2307 qctxt = &obt->obt_qctxt;
2309 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2310 /* quota_type has not been processed yet, return EAGAIN
2311 * until we know whether or not quotas are supposed to
2313 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2315 req->rq_status = -EAGAIN;
2319 cfs_down_read(&obt->obt_rwsem);
2320 if (qctxt->lqc_lqs_hash == NULL) {
2321 cfs_up_read(&obt->obt_rwsem);
2322 /* quota_type has not been processed yet, return EAGAIN
2323 * until we know whether or not quotas are supposed to
2325 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2327 req->rq_status = -EAGAIN;
2331 LASSERT(qctxt->lqc_handler);
2332 rc = qctxt->lqc_handler(master_obd, qdata,
2333 lustre_msg_get_opc(req->rq_reqmsg));
2334 cfs_up_read(&obt->obt_rwsem);
2335 if (rc && rc != -EDQUOT)
2336 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2337 "dqacq/dqrel failed! (rc:%d)\n", rc);
2338 req->rq_status = rc;
2340 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2342 CERROR("Can't pack qunit_data(rc: %d)\n", rc);
2346 /* Block the quota req. b=14840 */
2347 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2352 obd_unpin_observer(lov_obd);
2354 obd_unpin_observer(obd);
2356 rc = ptlrpc_reply(req);
2360 #endif /* !__KERNEL__ */
2362 #endif /* HAVE_QUOTA_SUPPORT */
2364 ldlm_mode_t lck_compat_array[] = {
2365 [LCK_EX] LCK_COMPAT_EX,
2366 [LCK_PW] LCK_COMPAT_PW,
2367 [LCK_PR] LCK_COMPAT_PR,
2368 [LCK_CW] LCK_COMPAT_CW,
2369 [LCK_CR] LCK_COMPAT_CR,
2370 [LCK_NL] LCK_COMPAT_NL,
2371 [LCK_GROUP] LCK_COMPAT_GROUP,
2372 [LCK_COS] LCK_COMPAT_COS,
2376 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2377 * not escape to the user level.
2379 int ldlm_error2errno(ldlm_error_t error)
2387 case ELDLM_LOCK_CHANGED:
2390 case ELDLM_LOCK_ABORTED:
2393 case ELDLM_LOCK_REPLACED:
2396 case ELDLM_NO_LOCK_DATA:
2399 case ELDLM_NAMESPACE_EXISTS:
2402 case ELDLM_BAD_NAMESPACE:
2406 if (((int)error) < 0) /* cast to signed type */
2407 result = error; /* as ldlm_error_t can be unsigned */
2409 CERROR("Invalid DLM result code: %i\n", error);
2415 EXPORT_SYMBOL(ldlm_error2errno);
2418 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2420 ldlm_error_t ldlm_errno2error(int err_no)
2429 error = ELDLM_LOCK_CHANGED;
2432 error = ELDLM_LOCK_ABORTED;
2435 error = ELDLM_LOCK_REPLACED;
2438 error = ELDLM_NO_LOCK_DATA;
2441 error = ELDLM_NAMESPACE_EXISTS;
2444 error = ELDLM_BAD_NAMESPACE;
2451 EXPORT_SYMBOL(ldlm_errno2error);
2453 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2454 void ldlm_dump_export_locks(struct obd_export *exp)
2456 cfs_spin_lock(&exp->exp_locks_list_guard);
2457 if (!cfs_list_empty(&exp->exp_locks_list)) {
2458 struct ldlm_lock *lock;
2460 CERROR("dumping locks for export %p,"
2461 "ignore if the unmount doesn't hang\n", exp);
2462 cfs_list_for_each_entry(lock, &exp->exp_locks_list, l_exp_refs_link)
2463 ldlm_lock_dump(D_ERROR, lock, 0);
2465 cfs_spin_unlock(&exp->exp_locks_list_guard);