4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2010, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * This file deals with various client/target related logic including recovery.
36 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
40 #define DEBUG_SUBSYSTEM S_LDLM
42 #include <linux/kthread.h>
43 #include <libcfs/libcfs.h>
45 #include <obd_class.h>
46 #include <lustre_dlm.h>
47 #include <lustre_net.h>
48 #include <lustre_sec.h>
49 #include "ldlm_internal.h"
51 /* @priority: If non-zero, move the selected connection to the list head.
52 * @create: If zero, only search in existing connections.
54 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
55 int priority, int create)
57 struct ptlrpc_connection *ptlrpc_conn;
58 struct obd_import_conn *imp_conn = NULL, *item;
59 lnet_nid_t nid4refnet = LNET_NID_ANY;
63 if (!create && !priority) {
64 CDEBUG(D_HA, "Nothing to do\n");
68 if (imp->imp_connection &&
69 imp->imp_connection->c_remote_uuid.uuid[0] == 0)
70 /* nid4refnet is used to restrict network connections */
71 nid4refnet = imp->imp_connection->c_self;
72 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid, nid4refnet);
74 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
79 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
81 GOTO(out_put, rc = -ENOMEM);
84 spin_lock(&imp->imp_lock);
85 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
86 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
88 list_del(&item->oic_item);
89 list_add(&item->oic_item,
91 item->oic_last_attempt = 0;
93 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
94 imp, imp->imp_obd->obd_name, uuid->uuid,
95 (priority ? ", moved to head" : ""));
96 spin_unlock(&imp->imp_lock);
97 GOTO(out_free, rc = 0);
100 /* No existing import connection found for \a uuid. */
102 imp_conn->oic_conn = ptlrpc_conn;
103 imp_conn->oic_uuid = *uuid;
104 imp_conn->oic_last_attempt = 0;
106 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
108 list_add_tail(&imp_conn->oic_item,
109 &imp->imp_conn_list);
110 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
111 imp, imp->imp_obd->obd_name, uuid->uuid,
112 (priority ? "head" : "tail"));
114 spin_unlock(&imp->imp_lock);
115 GOTO(out_free, rc = -ENOENT);
118 spin_unlock(&imp->imp_lock);
122 OBD_FREE(imp_conn, sizeof(*imp_conn));
124 ptlrpc_connection_put(ptlrpc_conn);
128 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
130 return import_set_conn(imp, uuid, 1, 0);
133 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
136 return import_set_conn(imp, uuid, priority, 1);
138 EXPORT_SYMBOL(client_import_add_conn);
140 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
142 struct obd_import_conn *imp_conn;
143 struct obd_export *dlmexp;
147 spin_lock(&imp->imp_lock);
148 if (list_empty(&imp->imp_conn_list)) {
149 LASSERT(!imp->imp_connection);
153 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
154 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
156 LASSERT(imp_conn->oic_conn);
158 if (imp_conn == imp->imp_conn_current) {
159 LASSERT(imp_conn->oic_conn == imp->imp_connection);
161 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
162 imp->imp_state != LUSTRE_IMP_DISCON) {
163 CERROR("can't remove current connection\n");
164 GOTO(out, rc = -EBUSY);
167 ptlrpc_connection_put(imp->imp_connection);
168 imp->imp_connection = NULL;
170 dlmexp = class_conn2export(&imp->imp_dlm_handle);
171 if (dlmexp && dlmexp->exp_connection) {
172 LASSERT(dlmexp->exp_connection ==
174 ptlrpc_connection_put(dlmexp->exp_connection);
175 dlmexp->exp_connection = NULL;
179 class_export_put(dlmexp);
182 list_del(&imp_conn->oic_item);
183 ptlrpc_connection_put(imp_conn->oic_conn);
184 OBD_FREE(imp_conn, sizeof(*imp_conn));
185 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
186 imp, imp->imp_obd->obd_name, uuid->uuid);
191 spin_unlock(&imp->imp_lock);
193 CERROR("connection %s not found\n", uuid->uuid);
196 EXPORT_SYMBOL(client_import_del_conn);
199 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
200 * to find a conn uuid of \a imp which can reach \a peer.
202 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
203 struct obd_uuid *uuid)
205 struct obd_import_conn *conn;
209 spin_lock(&imp->imp_lock);
210 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
211 /* Check if conn UUID does have this peer NID. */
212 if (class_check_uuid(&conn->oic_uuid, peer)) {
213 *uuid = conn->oic_uuid;
218 spin_unlock(&imp->imp_lock);
221 EXPORT_SYMBOL(client_import_find_conn);
223 void client_destroy_import(struct obd_import *imp)
225 /* Drop security policy instance after all RPCs have finished/aborted
226 * to let all busy contexts be released. */
227 class_import_get(imp);
228 class_destroy_import(imp);
229 sptlrpc_import_sec_put(imp);
230 class_import_put(imp);
232 EXPORT_SYMBOL(client_destroy_import);
235 * Check whether or not the OSC is on MDT.
238 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
240 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
243 static int osc_on_mdt(char *obdname)
247 ptr = strrchr(obdname, '-');
251 if (strncmp(ptr + 1, "MDT", 3) == 0)
257 /* Configure an RPC client OBD device.
262 * 3 - inactive-on-startup
263 * 4 - restrictive net
265 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
267 struct client_obd *cli = &obddev->u.cli;
268 struct obd_import *imp;
269 struct obd_uuid server_uuid;
270 int rq_portal, rp_portal, connect_op;
271 char *name = obddev->obd_type->typ_name;
272 enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
273 char *cli_name = lustre_cfg_buf(lcfg, 0);
274 struct ptlrpc_connection fake_conn = { .c_self = 0,
275 .c_remote_uuid.uuid[0] = 0 };
279 /* In a more perfect world, we would hang a ptlrpc_client off of
280 * obd_type and just use the values from there. */
281 if (!strcmp(name, LUSTRE_OSC_NAME)) {
282 rq_portal = OST_REQUEST_PORTAL;
283 rp_portal = OSC_REPLY_PORTAL;
284 connect_op = OST_CONNECT;
285 cli->cl_sp_me = LUSTRE_SP_CLI;
286 cli->cl_sp_to = LUSTRE_SP_OST;
287 ns_type = LDLM_NS_TYPE_OSC;
288 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
289 !strcmp(name, LUSTRE_LWP_NAME)) {
290 rq_portal = MDS_REQUEST_PORTAL;
291 rp_portal = MDC_REPLY_PORTAL;
292 connect_op = MDS_CONNECT;
293 if (is_lwp_on_ost(cli_name))
294 cli->cl_sp_me = LUSTRE_SP_OST;
295 else if (is_lwp_on_mdt(cli_name))
296 cli->cl_sp_me = LUSTRE_SP_MDT;
298 cli->cl_sp_me = LUSTRE_SP_CLI;
299 cli->cl_sp_to = LUSTRE_SP_MDT;
300 ns_type = LDLM_NS_TYPE_MDC;
301 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
302 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
303 /* OSP_on_MDT for other MDTs */
304 connect_op = MDS_CONNECT;
305 cli->cl_sp_to = LUSTRE_SP_MDT;
306 ns_type = LDLM_NS_TYPE_MDC;
307 rq_portal = OUT_PORTAL;
309 /* OSP on MDT for OST */
310 connect_op = OST_CONNECT;
311 cli->cl_sp_to = LUSTRE_SP_OST;
312 ns_type = LDLM_NS_TYPE_OSC;
313 rq_portal = OST_REQUEST_PORTAL;
315 rp_portal = OSC_REPLY_PORTAL;
316 cli->cl_sp_me = LUSTRE_SP_MDT;
317 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
318 rq_portal = MGS_REQUEST_PORTAL;
319 rp_portal = MGC_REPLY_PORTAL;
320 connect_op = MGS_CONNECT;
321 cli->cl_sp_me = LUSTRE_SP_MGC;
322 cli->cl_sp_to = LUSTRE_SP_MGS;
323 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
324 ns_type = LDLM_NS_TYPE_MGC;
326 CERROR("unknown client OBD type \"%s\", can't setup\n",
331 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
332 CERROR("requires a TARGET UUID\n");
336 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
337 CERROR("client UUID must be less than 38 characters\n");
341 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
342 CERROR("setup requires a SERVER UUID\n");
346 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
347 CERROR("target UUID must be less than 38 characters\n");
351 init_rwsem(&cli->cl_sem);
352 mutex_init(&cli->cl_mgc_mutex);
353 cli->cl_conn_count = 0;
354 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
355 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
356 sizeof(server_uuid)));
358 cli->cl_dirty_pages = 0;
359 cli->cl_avail_grant = 0;
360 /* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
361 /* cl_dirty_max_pages may be changed at connect time in
362 * ptlrpc_connect_interpret(). */
363 client_adjust_max_dirty(cli);
364 INIT_LIST_HEAD(&cli->cl_cache_waiters);
365 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
366 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
367 INIT_LIST_HEAD(&cli->cl_loi_write_list);
368 INIT_LIST_HEAD(&cli->cl_loi_read_list);
369 spin_lock_init(&cli->cl_loi_list_lock);
370 atomic_set(&cli->cl_pending_w_pages, 0);
371 atomic_set(&cli->cl_pending_r_pages, 0);
372 cli->cl_r_in_flight = 0;
373 cli->cl_w_in_flight = 0;
375 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
376 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
377 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
378 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
379 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
380 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
383 INIT_LIST_HEAD(&cli->cl_lru_osc);
384 atomic_set(&cli->cl_lru_shrinkers, 0);
385 atomic_long_set(&cli->cl_lru_busy, 0);
386 atomic_long_set(&cli->cl_lru_in_list, 0);
387 INIT_LIST_HEAD(&cli->cl_lru_list);
388 spin_lock_init(&cli->cl_lru_list_lock);
389 atomic_long_set(&cli->cl_unstable_count, 0);
390 INIT_LIST_HEAD(&cli->cl_shrink_list);
392 init_waitqueue_head(&cli->cl_destroy_waitq);
393 atomic_set(&cli->cl_destroy_in_flight, 0);
394 #ifdef ENABLE_CHECKSUM
395 /* Turn on checksumming by default. */
396 cli->cl_checksum = 1;
398 * The supported checksum types will be worked out at connect time
399 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
402 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
404 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
406 /* Set it to possible maximum size. It may be reduced by ocd_brw_size
407 * from OFD after connecting. */
408 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
410 /* set cl_chunkbits default value to PAGE_SHIFT,
411 * it will be updated at OSC connection time. */
412 cli->cl_chunkbits = PAGE_SHIFT;
414 if (!strcmp(name, LUSTRE_MDC_NAME)) {
415 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
416 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
417 cli->cl_max_rpcs_in_flight = 2;
418 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
419 cli->cl_max_rpcs_in_flight = 3;
420 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
421 cli->cl_max_rpcs_in_flight = 4;
423 if (osc_on_mdt(obddev->obd_name))
424 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
426 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
429 spin_lock_init(&cli->cl_mod_rpcs_lock);
430 spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
431 cli->cl_max_mod_rpcs_in_flight = 0;
432 cli->cl_mod_rpcs_in_flight = 0;
433 cli->cl_close_rpcs_in_flight = 0;
434 init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
435 cli->cl_mod_tag_bitmap = NULL;
437 if (connect_op == MDS_CONNECT) {
438 cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
439 OBD_ALLOC(cli->cl_mod_tag_bitmap,
440 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
441 if (cli->cl_mod_tag_bitmap == NULL)
442 GOTO(err, rc = -ENOMEM);
447 CERROR("ldlm_get_ref failed: %d\n", rc);
451 ptlrpc_init_client(rq_portal, rp_portal, name,
452 &obddev->obd_ldlm_client);
454 imp = class_new_import(obddev);
456 GOTO(err_ldlm, rc = -ENOENT);
457 imp->imp_client = &obddev->obd_ldlm_client;
458 imp->imp_connect_op = connect_op;
459 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
460 LUSTRE_CFG_BUFLEN(lcfg, 1));
461 class_import_put(imp);
463 if (lustre_cfg_buf(lcfg, 4)) {
464 __u32 refnet = libcfs_str2net(lustre_cfg_string(lcfg, 4));
466 if (refnet == LNET_NIDNET(LNET_NID_ANY)) {
468 CERROR("%s: bad mount option 'network=%s': rc = %d\n",
469 obddev->obd_name, lustre_cfg_string(lcfg, 4),
471 GOTO(err_import, rc);
473 fake_conn.c_self = LNET_MKNID(refnet, 0);
474 imp->imp_connection = &fake_conn;
477 rc = client_import_add_conn(imp, &server_uuid, 1);
479 CERROR("can't add initial connection\n");
480 GOTO(err_import, rc);
482 imp->imp_connection = NULL;
484 cli->cl_import = imp;
485 /* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
486 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
488 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
489 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
490 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
491 name, obddev->obd_name,
492 cli->cl_target_uuid.uuid);
493 spin_lock(&imp->imp_lock);
494 imp->imp_deactive = 1;
495 spin_unlock(&imp->imp_lock);
499 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
500 LDLM_NAMESPACE_CLIENT,
501 LDLM_NAMESPACE_GREEDY,
503 if (obddev->obd_namespace == NULL) {
504 CERROR("Unable to create client namespace - %s\n",
506 GOTO(err_import, rc = -ENOMEM);
512 class_destroy_import(imp);
516 if (cli->cl_mod_tag_bitmap != NULL)
517 OBD_FREE(cli->cl_mod_tag_bitmap,
518 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
519 cli->cl_mod_tag_bitmap = NULL;
523 EXPORT_SYMBOL(client_obd_setup);
525 int client_obd_cleanup(struct obd_device *obddev)
527 struct client_obd *cli = &obddev->u.cli;
530 ldlm_namespace_free_post(obddev->obd_namespace);
531 obddev->obd_namespace = NULL;
533 obd_cleanup_client_import(obddev);
534 LASSERT(obddev->u.cli.cl_import == NULL);
538 if (cli->cl_mod_tag_bitmap != NULL)
539 OBD_FREE(cli->cl_mod_tag_bitmap,
540 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
541 cli->cl_mod_tag_bitmap = NULL;
545 EXPORT_SYMBOL(client_obd_cleanup);
547 /* ->o_connect() method for client side (OSC and MDC and MGC) */
548 int client_connect_import(const struct lu_env *env,
549 struct obd_export **exp,
550 struct obd_device *obd, struct obd_uuid *cluuid,
551 struct obd_connect_data *data, void *localdata)
553 struct client_obd *cli = &obd->u.cli;
554 struct obd_import *imp = cli->cl_import;
555 struct obd_connect_data *ocd;
556 struct lustre_handle conn = { 0 };
562 down_write(&cli->cl_sem);
563 if (cli->cl_conn_count > 0)
564 GOTO(out_sem, rc = -EALREADY);
566 rc = class_connect(&conn, obd, cluuid);
570 cli->cl_conn_count++;
571 *exp = class_conn2export(&conn);
573 LASSERT(obd->obd_namespace);
575 imp->imp_dlm_handle = conn;
576 rc = ptlrpc_init_import(imp);
580 ocd = &imp->imp_connect_data;
583 is_mdc = strncmp(imp->imp_obd->obd_type->typ_name,
584 LUSTRE_MDC_NAME, 3) == 0;
586 data->ocd_connect_flags |= OBD_CONNECT_MULTIMODRPCS;
587 imp->imp_connect_flags_orig = data->ocd_connect_flags;
588 imp->imp_connect_flags2_orig = data->ocd_connect_flags2;
591 rc = ptlrpc_connect_import(imp);
594 data->ocd_connect_flags &= ~OBD_CONNECT_MULTIMODRPCS;
595 LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
598 LASSERT(*exp != NULL && (*exp)->exp_connection);
601 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
602 ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
603 data->ocd_connect_flags, ocd->ocd_connect_flags);
604 data->ocd_connect_flags = ocd->ocd_connect_flags;
605 /* clear the flag as it was not set and is not known
608 data->ocd_connect_flags &= ~OBD_CONNECT_MULTIMODRPCS;
611 ptlrpc_pinger_add_import(imp);
617 cli->cl_conn_count--;
618 class_disconnect(*exp);
622 up_write(&cli->cl_sem);
626 EXPORT_SYMBOL(client_connect_import);
628 int client_disconnect_export(struct obd_export *exp)
630 struct obd_device *obd = class_exp2obd(exp);
631 struct client_obd *cli;
632 struct obd_import *imp;
637 CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
638 exp, exp ? exp->exp_handle.h_cookie : -1);
643 imp = cli->cl_import;
645 down_write(&cli->cl_sem);
646 CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
649 if (cli->cl_conn_count == 0) {
650 CERROR("disconnecting disconnected device (%s)\n",
652 GOTO(out_disconnect, rc = -EINVAL);
655 cli->cl_conn_count--;
656 if (cli->cl_conn_count != 0)
657 GOTO(out_disconnect, rc = 0);
659 /* Mark import deactivated now, so we don't try to reconnect if any
660 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
661 * fully deactivate the import, or that would drop all requests. */
662 spin_lock(&imp->imp_lock);
663 imp->imp_deactive = 1;
664 spin_unlock(&imp->imp_lock);
666 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
667 * delete it regardless. (It's safe to delete an import that was
669 (void)ptlrpc_pinger_del_import(imp);
671 if (obd->obd_namespace != NULL) {
672 /* obd_force == local only */
673 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
674 obd->obd_force ? LCF_LOCAL : 0, NULL);
675 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
678 /* There's no need to hold sem while disconnecting an import,
679 * and it may actually cause deadlock in GSS. */
680 up_write(&cli->cl_sem);
681 rc = ptlrpc_disconnect_import(imp, 0);
682 down_write(&cli->cl_sem);
684 ptlrpc_invalidate_import(imp);
689 /* Use server style - class_disconnect should be always called for
691 err = class_disconnect(exp);
695 up_write(&cli->cl_sem);
699 EXPORT_SYMBOL(client_disconnect_export);
701 #ifdef HAVE_SERVER_SUPPORT
702 int server_disconnect_export(struct obd_export *exp)
707 /* Disconnect early so that clients can't keep using export. */
708 rc = class_disconnect(exp);
709 /* Close import to avoid sending any requests. */
710 if (exp->exp_imp_reverse)
711 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
713 ldlm_bl_thread_wakeup();
715 /* complete all outstanding replies */
716 spin_lock(&exp->exp_lock);
717 while (!list_empty(&exp->exp_outstanding_replies)) {
718 struct ptlrpc_reply_state *rs =
719 list_entry(exp->exp_outstanding_replies.next,
720 struct ptlrpc_reply_state, rs_exp_list);
721 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
723 spin_lock(&svcpt->scp_rep_lock);
725 list_del_init(&rs->rs_exp_list);
726 spin_lock(&rs->rs_lock);
727 ptlrpc_schedule_difficult_reply(rs);
728 spin_unlock(&rs->rs_lock);
730 spin_unlock(&svcpt->scp_rep_lock);
732 spin_unlock(&exp->exp_lock);
736 EXPORT_SYMBOL(server_disconnect_export);
738 /* --------------------------------------------------------------------------
739 * from old lib/target.c
740 * -------------------------------------------------------------------------- */
742 static int target_handle_reconnect(struct lustre_handle *conn,
743 struct obd_export *exp,
744 struct obd_uuid *cluuid)
746 struct obd_device *target;
747 struct lustre_handle *hdl;
754 hdl = &exp->exp_imp_reverse->imp_remote_handle;
755 if (!exp->exp_connection || !lustre_handle_is_used(hdl)) {
756 conn->cookie = exp->exp_handle.h_cookie;
757 CDEBUG(D_HA, "connect export for UUID '%s' at %p,"
758 " cookie %#llx\n", cluuid->uuid, exp, conn->cookie);
762 target = exp->exp_obd;
764 /* Might be a re-connect after a partition. */
765 if (memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
766 LCONSOLE_WARN("%s: already connected client %s (at %s) "
767 "with handle %#llx. Rejecting client "
768 "with the same UUID trying to reconnect "
769 "with handle %#llx\n", target->obd_name,
770 obd_uuid2str(&exp->exp_client_uuid),
771 obd_export_nid2str(exp),
772 hdl->cookie, conn->cookie);
773 memset(conn, 0, sizeof *conn);
774 /* target_handle_connect() treats EALREADY and
775 * -EALREADY differently. -EALREADY is an error
776 * (same UUID, different handle). */
780 if (!target->obd_recovering) {
781 LCONSOLE_WARN("%s: Client %s (at %s) reconnecting\n",
782 target->obd_name, obd_uuid2str(&exp->exp_client_uuid),
783 obd_export_nid2str(exp));
784 GOTO(out_already, rc);
787 now = cfs_time_current();
788 deadline = cfs_timer_deadline(&target->obd_recovery_timer);
789 if (cfs_time_before(now, deadline)) {
790 struct target_distribute_txn_data *tdtd =
791 class_exp2tgt(exp)->lut_tdtd;
796 timeout = cfs_duration_sec(cfs_time_sub(deadline, now));
797 if (tdtd && tdtd->tdtd_show_update_logs_retrievers)
798 buf = tdtd->tdtd_show_update_logs_retrievers(
799 tdtd->tdtd_show_retrievers_cbdata,
803 LCONSOLE_WARN("%s: Recovery already passed deadline "
804 "%d:%.02d. It is due to DNE recovery "
805 "failed/stuck on the %d MDT(s):%s. "
806 "Please wait until all MDTs recovered "
807 "or abort the recovery by force.\n",
808 target->obd_name, timeout / 60,
810 buf ? buf : "unknown (not enough RAM)");
812 LCONSOLE_WARN("%s: Recovery already passed deadline "
813 "%d:%.02d. If you do not want to wait "
814 "more, please abort the recovery by "
815 "force.\n", target->obd_name,
816 timeout / 60, timeout % 60);
821 timeout = cfs_duration_sec(cfs_time_sub(now, deadline));
822 LCONSOLE_WARN("%s: Recovery already passed deadline"
823 " %d:%.02d, It is most likely due to DNE"
824 " recovery is failed or stuck, please wait a"
825 " few more minutes or abort the recovery.\n",
826 target->obd_name, timeout / 60, timeout % 60);
830 conn->cookie = exp->exp_handle.h_cookie;
831 /* target_handle_connect() treats EALREADY and
832 * -EALREADY differently. EALREADY means we are
833 * doing a valid reconnect from the same client. */
837 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
840 struct obd_export *exp = cb_data;
842 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
843 obd->obd_name, exp->exp_client_uuid.uuid);
845 spin_lock(&exp->exp_lock);
846 exp->exp_need_sync = 0;
847 spin_unlock(&exp->exp_lock);
848 class_export_cb_put(exp);
852 check_and_start_recovery_timer(struct obd_device *obd,
853 struct ptlrpc_request *req, int new_client);
856 * update flags for import during reconnect process
858 static int rev_import_flags_update(struct obd_import *revimp,
859 struct ptlrpc_request *req)
862 struct obd_connect_data *data;
864 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
866 if (data->ocd_connect_flags & OBD_CONNECT_AT)
867 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
869 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
871 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
873 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
875 CERROR("%s: cannot get reverse import %s security: rc = %d\n",
876 revimp->imp_client->cli_name,
877 libcfs_id2str(req->rq_peer), rc);
885 * Allocate a new reverse import for an export.
887 * \retval -errno in case error hit
888 * \retval 0 if reverse import correctly init
890 int rev_import_init(struct obd_export *export)
892 struct obd_device *obd = export->exp_obd;
893 struct obd_import *revimp;
895 LASSERT(export->exp_imp_reverse == NULL);
897 revimp = class_new_import(obd);
901 revimp->imp_remote_handle.cookie = 0ULL;
902 revimp->imp_client = &obd->obd_ldlm_client;
903 revimp->imp_dlm_fake = 1;
905 /* it is safe to connect import in new state as no sends possible */
906 spin_lock(&export->exp_lock);
907 export->exp_imp_reverse = revimp;
908 spin_unlock(&export->exp_lock);
909 class_import_put(revimp);
913 EXPORT_SYMBOL(rev_import_init);
916 * Handle reconnect for an export.
918 * \param exp export to handle reconnect process
919 * \param req client reconnect request
921 * \retval -rc in case securitfy flavor can't be changed
922 * \retval 0 in case none problems
924 static int rev_import_reconnect(struct obd_export *exp,
925 struct ptlrpc_request *req)
927 struct obd_import *revimp = exp->exp_imp_reverse;
928 struct lustre_handle *lh;
931 /* avoid sending a request until import flags are changed */
932 ptlrpc_import_enter_resend(revimp);
934 if (revimp->imp_connection != NULL)
935 ptlrpc_connection_put(revimp->imp_connection);
938 * client from recovery don't have a handle so we need to take from
939 * request. it may produce situation when wrong client connected
940 * to recovery as we trust a client uuid
942 lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
943 revimp->imp_remote_handle = *lh;
945 /* unknown versions will be caught in
946 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
947 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
949 revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
951 rc = rev_import_flags_update(revimp, req);
953 /* it is safe to still be in RECOVERY phase as we are not able
954 * to setup correct security flavor so requests are not able to
955 * be delivered correctly */
959 /* resend all rpc's via new connection */
960 return ptlrpc_import_recovery_state_machine(revimp);
963 int target_handle_connect(struct ptlrpc_request *req)
965 struct obd_device *target = NULL;
966 struct obd_export *export = NULL;
967 /* connect handle - filled from target_handle_reconnect in
969 struct lustre_handle conn;
970 struct lustre_handle *tmp;
971 struct obd_uuid tgtuuid;
972 struct obd_uuid cluuid;
977 bool mds_conn = false, lw_client = false, initial_conn = false;
978 bool mds_mds_conn = false;
979 bool new_mds_mds_conn = false;
980 bool target_referenced = false;
981 struct obd_connect_data *data, *tmpdata;
983 lnet_nid_t *client_nid = NULL;
986 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
988 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
990 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
991 GOTO(out, rc = -EINVAL);
994 obd_str2uuid(&tgtuuid, str);
995 target = class_uuid2obd(&tgtuuid);
997 target = class_name2obd(str);
1000 deuuidify(str, NULL, &target_start, &target_len);
1001 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
1002 "from %s (no target). If you are running "
1003 "an HA pair check that the target is "
1004 "mounted on the other server.\n", str,
1005 libcfs_nid2str(req->rq_peer.nid));
1006 GOTO(out, rc = -ENODEV);
1009 spin_lock(&target->obd_dev_lock);
1010 if (target->obd_stopping || !target->obd_set_up) {
1011 spin_unlock(&target->obd_dev_lock);
1013 deuuidify(str, NULL, &target_start, &target_len);
1014 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
1015 target_len, target_start,
1016 libcfs_nid2str(req->rq_peer.nid),
1017 (target->obd_stopping ?
1018 "stopping" : "not set up"));
1019 GOTO(out, rc = -ENODEV);
1022 if (target->obd_no_conn) {
1023 spin_unlock(&target->obd_dev_lock);
1025 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
1026 "from %s\n", target->obd_name,
1027 libcfs_nid2str(req->rq_peer.nid));
1028 GOTO(out, rc = -EAGAIN);
1031 /* Make sure the target isn't cleaned up while we're here. Yes,
1032 * there's still a race between the above check and our incref here.
1033 * Really, class_uuid2obd should take the ref. */
1034 class_incref(target, __func__, current);
1035 target_referenced = true;
1037 target->obd_conn_inprogress++;
1038 spin_unlock(&target->obd_dev_lock);
1040 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
1042 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
1043 GOTO(out, rc = -EINVAL);
1046 obd_str2uuid(&cluuid, str);
1048 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1050 GOTO(out, rc = -EPROTO);
1054 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1056 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
1058 GOTO(out, rc = -EPROTO);
1060 rc = req_capsule_server_pack(&req->rq_pill);
1064 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
1065 /* Don't allow clients to connect that are using old 1.8 format
1066 * protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
1067 * ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
1068 * FULL20 flag should be set on all connections since 2.0, but no
1069 * longer affects behaviour.
1071 * Later this check will be disabled and the flag can be retired
1072 * completely once interop with 3.0 is no longer needed.
1074 if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
1075 GOTO(out, rc = -EPROTO);
1078 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1079 if (data->ocd_version < LUSTRE_VERSION_CODE -
1080 LUSTRE_VERSION_ALLOWED_OFFSET ||
1081 data->ocd_version > LUSTRE_VERSION_CODE +
1082 LUSTRE_VERSION_ALLOWED_OFFSET) {
1083 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
1084 "libclient connection attempt",
1085 data->ocd_version < LUSTRE_VERSION_CODE ?
1087 OBD_OCD_VERSION_MAJOR(data->ocd_version),
1088 OBD_OCD_VERSION_MINOR(data->ocd_version),
1089 OBD_OCD_VERSION_PATCH(data->ocd_version),
1090 OBD_OCD_VERSION_FIX(data->ocd_version));
1091 data = req_capsule_server_sized_get(&req->rq_pill,
1093 offsetof(typeof(*data), ocd_version) +
1094 sizeof(data->ocd_version));
1096 data->ocd_connect_flags = OBD_CONNECT_VERSION;
1097 data->ocd_version = LUSTRE_VERSION_CODE;
1099 GOTO(out, rc = -EPROTO);
1103 /* Note: lw_client is needed in MDS-MDS failover during update log
1104 * processing, so we needs to allow lw_client to be connected at
1105 * anytime, instead of only the initial connection */
1106 lw_client = (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0;
1108 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
1109 initial_conn = true;
1110 mds_conn = (data->ocd_connect_flags & OBD_CONNECT_MDS) != 0;
1111 mds_mds_conn = (data->ocd_connect_flags &
1112 OBD_CONNECT_MDS_MDS) != 0;
1114 /* OBD_CONNECT_MNE_SWAB is defined as OBD_CONNECT_MDS_MDS
1115 * for Imperative Recovery connection from MGC to MGS.
1117 * Via check OBD_CONNECT_FID, we can distinguish whether
1118 * the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
1121 (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1122 (data->ocd_connect_flags & OBD_CONNECT_FID) &&
1123 (data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
1124 __u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
1125 __u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
1126 __u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
1128 /* We do not support the MDT-MDT interoperations with
1129 * different version MDT because of protocol changes. */
1130 if (unlikely(major != LUSTRE_MAJOR ||
1131 minor != LUSTRE_MINOR ||
1132 abs(patch - LUSTRE_PATCH) > 3)) {
1133 LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the "
1134 "connection from different version MDT "
1135 "(%d.%d.%d.%d) %s %s\n",
1136 target->obd_name, LUSTRE_MAJOR,
1137 LUSTRE_MINOR, LUSTRE_PATCH, LUSTRE_FIX,
1138 major, minor, patch,
1139 OBD_OCD_VERSION_FIX(data->ocd_version),
1140 libcfs_nid2str(req->rq_peer.nid), str);
1142 GOTO(out, rc = -EPROTO);
1147 /* lctl gets a backstage, all-access pass. */
1148 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
1149 goto dont_check_exports;
1151 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
1155 /* We've found an export in the hash. */
1157 spin_lock(&export->exp_lock);
1159 if (export->exp_connecting) { /* bug 9635, et. al. */
1160 spin_unlock(&export->exp_lock);
1161 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
1162 export->exp_obd->obd_name, export,
1163 libcfs_nid2str(req->rq_peer.nid));
1164 class_export_put(export);
1167 } else if ((mds_conn || (lw_client && initial_conn) ||
1168 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1169 export->exp_connection != NULL) {
1170 spin_unlock(&export->exp_lock);
1171 if (req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1172 /* MDS or LWP reconnected after failover. */
1173 LCONSOLE_WARN("%s: Received %s connection from "
1174 "%s, removing former export from %s\n",
1175 target->obd_name, mds_conn ? "MDS" : "LWP",
1176 libcfs_nid2str(req->rq_peer.nid),
1177 libcfs_nid2str(export->exp_connection->c_peer.nid));
1179 /* New MDS connection from the same NID. */
1180 LCONSOLE_WARN("%s: Received new %s connection from "
1181 "%s, removing former export from same NID\n",
1182 target->obd_name, mds_conn ? "MDS" : "LWP",
1183 libcfs_nid2str(req->rq_peer.nid));
1186 if (req->rq_peer.nid == export->exp_connection->c_peer.nid &&
1187 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) {
1188 /* Because exports between MDTs will always be
1189 * kept, let's do not fail such export if they
1190 * come from the same NID, otherwise it might
1191 * cause eviction between MDTs, which might
1192 * cause namespace inconsistency */
1193 spin_lock(&export->exp_lock);
1194 export->exp_connecting = 1;
1195 spin_unlock(&export->exp_lock);
1196 conn.cookie = export->exp_handle.h_cookie;
1199 class_fail_export(export);
1200 class_export_put(export);
1204 } else if (export->exp_connection != NULL && initial_conn &&
1205 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1206 spin_unlock(&export->exp_lock);
1207 /* In MDS failover we have static UUID but NID can change. */
1208 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
1209 "existing nid %s is already connected\n",
1210 target->obd_name, cluuid.uuid,
1211 libcfs_nid2str(req->rq_peer.nid),
1213 export->exp_connection->c_peer.nid));
1215 class_export_put(export);
1218 export->exp_connecting = 1;
1219 spin_unlock(&export->exp_lock);
1220 LASSERT(export->exp_obd == target);
1222 rc = target_handle_reconnect(&conn, export, &cluuid);
1225 /* If we found an export, we already unlocked. */
1228 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
1229 } else if (req->rq_export == NULL &&
1230 atomic_read(&export->exp_rpc_count) > 0) {
1231 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
1232 "still busy with %d references\n",
1233 target->obd_name, cluuid.uuid,
1234 libcfs_nid2str(req->rq_peer.nid),
1235 atomic_read(&export->exp_refcount));
1236 GOTO(out, rc = -EBUSY);
1237 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
1238 if (!strstr(cluuid.uuid, "mdt"))
1239 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1240 "known client %s (at %s) because it "
1241 "is indicating it is a new client",
1242 target->obd_name, cluuid.uuid,
1243 libcfs_nid2str(req->rq_peer.nid));
1244 GOTO(out, rc = -EALREADY);
1246 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1253 CDEBUG(D_HA, "%s: connection from %s@%s %st%llu exp %p cur %ld last %ld\n",
1254 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1255 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1256 export, (long)cfs_time_current_sec(),
1257 export ? (long)export->exp_last_request_time : 0);
1259 /* If this is the first time a client connects, reset the recovery
1260 * timer. Discard lightweight connections which might be local. */
1261 if (!lw_client && rc == 0 && target->obd_recovering)
1262 check_and_start_recovery_timer(target, req, export == NULL);
1264 /* We want to handle EALREADY but *not* -EALREADY from
1265 * target_handle_reconnect(), return reconnection state in a flag. */
1266 if (rc == EALREADY) {
1267 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1273 /* Tell the client if we support replayable requests. */
1274 if (target->obd_replayable)
1275 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1276 client_nid = &req->rq_peer.nid;
1278 if (export == NULL) {
1279 /* allow lightweight connections during recovery */
1280 /* allow "new" MDT to be connected during recovery, since we
1281 * need retrieve recovery update records from it */
1282 if (target->obd_recovering && !lw_client && !mds_mds_conn) {
1284 int c; /* connected */
1285 int i; /* in progress */
1287 int s; /* stale/evicted */
1289 c = atomic_read(&target->obd_connected_clients);
1290 i = atomic_read(&target->obd_lock_replay_clients);
1291 k = target->obd_max_recoverable_clients;
1292 s = target->obd_stale_clients;
1293 t = cfs_timer_deadline(&target->obd_recovery_timer);
1294 t = cfs_time_sub(t, cfs_time_current());
1295 t = cfs_duration_sec(t);
1296 LCONSOLE_WARN("%s: Denying connection for new client %s"
1297 "(at %s), waiting for %d known clients "
1298 "(%d recovered, %d in progress, and %d "
1299 "evicted) to recover in %d:%.02d\n",
1300 target->obd_name, cluuid.uuid,
1301 libcfs_nid2str(req->rq_peer.nid), k,
1302 c - i, i, s, (int)t / 60,
1307 rc = obd_connect(req->rq_svc_thread->t_env,
1308 &export, target, &cluuid, data,
1310 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1311 lustre_msg_add_op_flags(req->rq_repmsg,
1312 MSG_CONNECT_RECOVERING);
1314 conn.cookie = export->exp_handle.h_cookie;
1315 rc = rev_import_init(export);
1319 new_mds_mds_conn = true;
1322 rc = obd_reconnect(req->rq_svc_thread->t_env,
1323 export, target, &cluuid, data, client_nid);
1328 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1329 data->ocd_instance = target->u.obt.obt_instance;
1331 /* Return only the parts of obd_connect_data that we understand, so the
1332 * client knows that we don't understand the rest. */
1334 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1336 tmpdata = req_capsule_server_get(&req->rq_pill,
1338 /* Don't use struct assignment here, because the client reply
1339 * buffer may be smaller/larger than the local struct
1340 * obd_connect_data. */
1341 memcpy(tmpdata, data, min(tmpsize, size));
1344 /* If the client and the server are the same node, we will already
1345 * have an export that really points to the client's DLM export,
1346 * because we have a shared handles table.
1348 * XXX this will go away when shaver stops sending the "connect" handle
1349 * in the real "remote handle" field of the request --phik 24 Apr 2003
1351 ptlrpc_request_change_export(req, export);
1353 spin_lock(&export->exp_lock);
1354 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1355 spin_unlock(&export->exp_lock);
1356 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1357 "or equal conn_cnt: %d >= %d\n",
1358 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1359 export->exp_conn_cnt,
1360 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1362 GOTO(out, rc = -EALREADY);
1364 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1365 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1367 /* Don't evict liblustre clients for not pinging. */
1368 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1369 export->exp_libclient = 1;
1370 spin_unlock(&export->exp_lock);
1372 spin_lock(&target->obd_dev_lock);
1373 list_del_init(&export->exp_obd_chain_timed);
1374 spin_unlock(&target->obd_dev_lock);
1376 spin_unlock(&export->exp_lock);
1379 if (export->exp_connection != NULL) {
1380 /* Check to see if connection came from another NID. */
1381 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1382 !hlist_unhashed(&export->exp_nid_hash))
1383 cfs_hash_del(export->exp_obd->obd_nid_hash,
1384 &export->exp_connection->c_peer.nid,
1385 &export->exp_nid_hash);
1387 ptlrpc_connection_put(export->exp_connection);
1390 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1393 if (hlist_unhashed(&export->exp_nid_hash))
1394 cfs_hash_add(export->exp_obd->obd_nid_hash,
1395 &export->exp_connection->c_peer.nid,
1396 &export->exp_nid_hash);
1398 lustre_msg_set_handle(req->rq_repmsg, &conn);
1400 rc = rev_import_reconnect(export, req);
1404 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1406 __u64 transno = data->ocd_transno;
1408 spin_lock(&export->exp_lock);
1409 /* possible race with class_disconnect_stale_exports,
1410 * export may be already in the eviction process */
1411 if (export->exp_failed) {
1412 spin_unlock(&export->exp_lock);
1413 GOTO(out, rc = -ENODEV);
1415 export->exp_in_recovery = 1;
1416 export->exp_req_replay_needed = 1;
1417 export->exp_lock_replay_needed = 1;
1418 spin_unlock(&export->exp_lock);
1420 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1421 MSG_CONNECT_TRANSNO);
1422 if (has_transno && transno == 0)
1423 CWARN("Connect with zero transno!\n");
1425 if (has_transno && transno > 0 &&
1426 transno < target->obd_next_recovery_transno &&
1427 transno > target->obd_last_committed) {
1428 /* Another way is to use cmpxchg() to be lock-free. */
1429 spin_lock(&target->obd_recovery_task_lock);
1430 if (transno < target->obd_next_recovery_transno)
1431 target->obd_next_recovery_transno = transno;
1432 spin_unlock(&target->obd_recovery_task_lock);
1435 atomic_inc(&target->obd_req_replay_clients);
1436 atomic_inc(&target->obd_lock_replay_clients);
1437 /* Note: MDS-MDS connection is allowed to be connected during
1438 * recovery, no matter if the exports needs to be recoveried.
1439 * Because we need retrieve updates logs from all other MDTs.
1440 * So if the MDS-MDS export is new, obd_max_recoverable_clients
1441 * also needs to be increased to match other recovery checking
1443 if (new_mds_mds_conn)
1444 target->obd_max_recoverable_clients++;
1445 if (atomic_inc_return(&target->obd_connected_clients) ==
1446 target->obd_max_recoverable_clients)
1447 wake_up(&target->obd_next_transno_waitq);
1450 /* Tell the client we're in recovery, when client is involved in it. */
1451 if (target->obd_recovering && !lw_client)
1452 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1456 spin_lock(&export->exp_lock);
1457 export->exp_connecting = 0;
1458 spin_unlock(&export->exp_lock);
1460 class_export_put(export);
1462 if (target_referenced == true && target != NULL) {
1463 spin_lock(&target->obd_dev_lock);
1464 target->obd_conn_inprogress--;
1465 spin_unlock(&target->obd_dev_lock);
1467 class_decref(target, __func__, current);
1469 req->rq_status = rc;
1473 int target_handle_disconnect(struct ptlrpc_request *req)
1478 rc = req_capsule_server_pack(&req->rq_pill);
1482 /* Keep the rq_export around so we can send the reply. */
1483 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1488 void target_destroy_export(struct obd_export *exp)
1490 struct obd_import *imp = NULL;
1491 /* exports created from last_rcvd data, and "fake"
1492 exports created by lctl don't have an import */
1493 spin_lock(&exp->exp_lock);
1494 if (exp->exp_imp_reverse != NULL) {
1495 imp = exp->exp_imp_reverse;
1496 exp->exp_imp_reverse = NULL;
1498 spin_unlock(&exp->exp_lock);
1500 client_destroy_import(imp);
1502 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1503 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1504 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1505 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1507 EXPORT_SYMBOL(target_destroy_export);
1510 * Recovery functions
1512 static void target_request_copy_get(struct ptlrpc_request *req)
1514 class_export_rpc_inc(req->rq_export);
1515 LASSERT(list_empty(&req->rq_list));
1516 INIT_LIST_HEAD(&req->rq_replay_list);
1518 /* Increase refcount to keep request in queue. */
1519 atomic_inc(&req->rq_refcount);
1520 /* Let export know it has replays to be handled. */
1521 atomic_inc(&req->rq_export->exp_replay_count);
1524 static void target_request_copy_put(struct ptlrpc_request *req)
1526 LASSERT(list_empty(&req->rq_replay_list));
1527 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1529 atomic_dec(&req->rq_export->exp_replay_count);
1530 class_export_rpc_dec(req->rq_export);
1531 ptlrpc_server_drop_request(req);
1534 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1536 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1537 struct obd_export *exp = req->rq_export;
1538 struct ptlrpc_request *reqiter;
1539 struct ptlrpc_request *dup_req = NULL;
1544 spin_lock(&exp->exp_lock);
1545 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1547 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1555 /* We expect it with RESENT and REPLAY flags. */
1556 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1557 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1558 CERROR("invalid flags %x of resent replay\n",
1559 lustre_msg_get_flags(req->rq_reqmsg));
1561 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1564 new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1566 lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
1567 lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
1571 list_add_tail(&req->rq_replay_list,
1572 &exp->exp_req_replay_queue);
1575 spin_unlock(&exp->exp_lock);
1579 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1581 LASSERT(!list_empty(&req->rq_replay_list));
1582 LASSERT(req->rq_export);
1584 spin_lock(&req->rq_export->exp_lock);
1585 list_del_init(&req->rq_replay_list);
1586 spin_unlock(&req->rq_export->exp_lock);
1589 static void target_finish_recovery(struct lu_target *lut)
1591 struct obd_device *obd = lut->lut_obd;
1594 /* Only log a recovery message when recovery has occurred. */
1595 if (obd->obd_recovery_start) {
1596 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1597 obd->obd_recovery_start);
1598 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1599 "%d recovered and %d %s evicted.\n", obd->obd_name,
1600 (int)elapsed_time / 60, (int)elapsed_time % 60,
1601 obd->obd_max_recoverable_clients,
1602 atomic_read(&obd->obd_connected_clients),
1603 obd->obd_stale_clients,
1604 obd->obd_stale_clients == 1 ? "was" : "were");
1607 ldlm_reprocess_all_ns(obd->obd_namespace);
1608 spin_lock(&obd->obd_recovery_task_lock);
1609 if (!list_empty(&obd->obd_req_replay_queue) ||
1610 !list_empty(&obd->obd_lock_replay_queue) ||
1611 !list_empty(&obd->obd_final_req_queue)) {
1612 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1614 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1615 list_empty(&obd->obd_lock_replay_queue) ? \
1617 list_empty(&obd->obd_final_req_queue) ? \
1619 spin_unlock(&obd->obd_recovery_task_lock);
1622 spin_unlock(&obd->obd_recovery_task_lock);
1624 obd->obd_recovery_end = cfs_time_current_sec();
1626 /* When recovery finished, cleanup orphans on MDS and OST. */
1627 if (OBT(obd) && OBP(obd, postrecov)) {
1628 int rc = OBP(obd, postrecov)(obd);
1630 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1636 static void abort_req_replay_queue(struct obd_device *obd)
1638 struct ptlrpc_request *req, *n;
1639 struct list_head abort_list;
1641 INIT_LIST_HEAD(&abort_list);
1642 spin_lock(&obd->obd_recovery_task_lock);
1643 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1644 spin_unlock(&obd->obd_recovery_task_lock);
1645 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1646 DEBUG_REQ(D_WARNING, req, "aborted:");
1647 req->rq_status = -ENOTCONN;
1648 if (ptlrpc_error(req)) {
1649 DEBUG_REQ(D_ERROR, req,
1650 "failed abort_req_reply; skipping");
1652 target_exp_dequeue_req_replay(req);
1653 target_request_copy_put(req);
1657 static void abort_lock_replay_queue(struct obd_device *obd)
1659 struct ptlrpc_request *req, *n;
1660 struct list_head abort_list;
1662 INIT_LIST_HEAD(&abort_list);
1663 spin_lock(&obd->obd_recovery_task_lock);
1664 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1665 spin_unlock(&obd->obd_recovery_task_lock);
1666 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1667 DEBUG_REQ(D_ERROR, req, "aborted:");
1668 req->rq_status = -ENOTCONN;
1669 if (ptlrpc_error(req)) {
1670 DEBUG_REQ(D_ERROR, req,
1671 "failed abort_lock_reply; skipping");
1673 target_request_copy_put(req);
1677 /* Called from a cleanup function if the device is being cleaned up
1678 forcefully. The exports should all have been disconnected already,
1679 the only thing left to do is
1680 - clear the recovery flags
1682 - free queued requests and replies, but don't send replies
1683 Because the obd_stopping flag is set, no new requests should be received.
1686 void target_cleanup_recovery(struct obd_device *obd)
1688 struct ptlrpc_request *req, *n;
1689 struct list_head clean_list;
1691 INIT_LIST_HEAD(&clean_list);
1692 spin_lock(&obd->obd_dev_lock);
1693 if (!obd->obd_recovering) {
1694 spin_unlock(&obd->obd_dev_lock);
1698 obd->obd_recovering = obd->obd_abort_recovery = 0;
1699 spin_unlock(&obd->obd_dev_lock);
1701 spin_lock(&obd->obd_recovery_task_lock);
1702 target_cancel_recovery_timer(obd);
1703 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1704 spin_unlock(&obd->obd_recovery_task_lock);
1706 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1707 LASSERT(req->rq_reply_state == NULL);
1708 target_exp_dequeue_req_replay(req);
1709 target_request_copy_put(req);
1712 spin_lock(&obd->obd_recovery_task_lock);
1713 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1714 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1715 spin_unlock(&obd->obd_recovery_task_lock);
1717 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1718 LASSERT(req->rq_reply_state == NULL);
1719 target_request_copy_put(req);
1724 EXPORT_SYMBOL(target_cleanup_recovery);
1726 /* obd_recovery_task_lock should be held */
1727 void target_cancel_recovery_timer(struct obd_device *obd)
1729 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1730 cfs_timer_disarm(&obd->obd_recovery_timer);
1733 static void target_start_recovery_timer(struct obd_device *obd)
1735 if (obd->obd_recovery_start != 0)
1738 spin_lock(&obd->obd_dev_lock);
1739 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1740 spin_unlock(&obd->obd_dev_lock);
1744 LASSERT(obd->obd_recovery_timeout != 0);
1746 if (obd->obd_recovery_start != 0) {
1747 spin_unlock(&obd->obd_dev_lock);
1751 cfs_timer_arm(&obd->obd_recovery_timer,
1752 cfs_time_shift(obd->obd_recovery_timeout));
1753 obd->obd_recovery_start = cfs_time_current_sec();
1754 spin_unlock(&obd->obd_dev_lock);
1756 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1757 "or until %d client%s reconnect%s\n",
1759 obd->obd_recovery_timeout / 60,
1760 obd->obd_recovery_timeout % 60,
1761 obd->obd_max_recoverable_clients,
1762 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1763 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1767 * extend recovery window.
1769 * if @extend is true, extend recovery window to have @drt remaining at least;
1770 * otherwise, make sure the recovery timeout value is not less than @drt.
1772 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1776 cfs_duration_t left;
1779 spin_lock(&obd->obd_dev_lock);
1780 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1781 spin_unlock(&obd->obd_dev_lock);
1784 LASSERT(obd->obd_recovery_start != 0);
1786 now = cfs_time_current_sec();
1787 to = obd->obd_recovery_timeout;
1788 end = obd->obd_recovery_start + to;
1789 left = cfs_time_sub(end, now);
1791 if (extend && (drt > left)) {
1793 } else if (!extend && (drt > to)) {
1797 if (to > obd->obd_recovery_time_hard)
1798 to = obd->obd_recovery_time_hard;
1799 if (obd->obd_recovery_timeout < to) {
1800 obd->obd_recovery_timeout = to;
1801 end = obd->obd_recovery_start + to;
1802 cfs_timer_arm(&obd->obd_recovery_timer,
1803 cfs_time_shift(end - now));
1805 spin_unlock(&obd->obd_dev_lock);
1807 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1808 obd->obd_name, (unsigned)cfs_time_sub(end, now));
1811 /* Reset the timer with each new client connection */
1813 * This timer is actually reconnect_timer, which is for making sure
1814 * the total recovery window is at least as big as my reconnect
1815 * attempt timing. So the initial recovery time_out will be set to
1816 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1817 * from client is bigger than this, then the recovery time_out will
1818 * be extended to make sure the client could be reconnected, in the
1819 * process, the timeout from the new client should be ignored.
1823 check_and_start_recovery_timer(struct obd_device *obd,
1824 struct ptlrpc_request *req,
1827 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1828 struct obd_device_target *obt = &obd->u.obt;
1830 if (!new_client && service_time)
1831 /* Teach server about old server's estimates, as first guess
1832 * at how long new requests will take. */
1833 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1836 target_start_recovery_timer(obd);
1838 /* Convert the service time to RPC timeout,
1839 * and reuse service_time to limit stack usage. */
1840 service_time = at_est2timeout(service_time);
1842 /* We expect other clients to timeout within service_time, then try
1843 * to reconnect, then try the failover server. The max delay between
1844 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1845 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1847 LASSERT(obt->obt_magic == OBT_MAGIC);
1848 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1849 if (service_time > obd->obd_recovery_timeout && !new_client)
1850 extend_recovery_timer(obd, service_time, false);
1853 /** Health checking routines */
1854 static inline int exp_connect_healthy(struct obd_export *exp)
1856 return (exp->exp_in_recovery);
1859 /** if export done req_replay or has replay in queue */
1860 static inline int exp_req_replay_healthy(struct obd_export *exp)
1862 return (!exp->exp_req_replay_needed ||
1863 atomic_read(&exp->exp_replay_count) > 0);
1867 static inline int exp_req_replay_healthy_or_from_mdt(struct obd_export *exp)
1869 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1870 exp_req_replay_healthy(exp);
1873 /** if export done lock_replay or has replay in queue */
1874 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1876 return (!exp->exp_lock_replay_needed ||
1877 atomic_read(&exp->exp_replay_count) > 0);
1880 static inline int exp_vbr_healthy(struct obd_export *exp)
1882 return (!exp->exp_vbr_failed);
1885 static inline int exp_finished(struct obd_export *exp)
1887 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1890 static inline int exp_finished_or_from_mdt(struct obd_export *exp)
1892 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1896 static int check_for_next_transno(struct lu_target *lut)
1898 struct ptlrpc_request *req = NULL;
1899 struct obd_device *obd = lut->lut_obd;
1900 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
1901 int wake_up = 0, connected, completed, queue_len;
1902 __u64 req_transno = 0;
1903 __u64 update_transno = 0;
1904 __u64 next_transno = 0;
1907 spin_lock(&obd->obd_recovery_task_lock);
1908 if (!list_empty(&obd->obd_req_replay_queue)) {
1909 req = list_entry(obd->obd_req_replay_queue.next,
1910 struct ptlrpc_request, rq_list);
1911 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1915 update_transno = distribute_txn_get_next_transno(tdtd);
1917 connected = atomic_read(&obd->obd_connected_clients);
1918 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1919 queue_len = obd->obd_requests_queued_for_recovery;
1920 next_transno = obd->obd_next_recovery_transno;
1922 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1923 "req_transno: %llu, next_transno: %llu\n",
1924 obd->obd_max_recoverable_clients, connected, completed,
1925 queue_len, req_transno, next_transno);
1927 if (obd->obd_abort_recovery) {
1928 CDEBUG(D_HA, "waking for aborted recovery\n");
1930 } else if (obd->obd_recovery_expired) {
1931 CDEBUG(D_HA, "waking for expired recovery\n");
1933 } else if (tdtd != NULL && req != NULL &&
1934 is_req_replayed_by_update(req)) {
1935 LASSERTF(req_transno < next_transno, "req_transno %llu"
1936 "next_transno%llu\n", req_transno, next_transno);
1937 CDEBUG(D_HA, "waking for duplicate req (%llu)\n",
1940 } else if (req_transno == next_transno ||
1941 (update_transno != 0 && update_transno <= next_transno)) {
1942 CDEBUG(D_HA, "waking for next (%lld)\n", next_transno);
1944 } else if (queue_len > 0 &&
1945 queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1946 /** handle gaps occured due to lost reply or VBR */
1947 LASSERTF(req_transno >= next_transno,
1948 "req_transno: %llu, next_transno: %llu\n",
1949 req_transno, next_transno);
1951 "%s: waking for gap in transno, VBR is %s (skip: "
1952 "%lld, ql: %d, comp: %d, conn: %d, next: %lld"
1953 ", next_update %lld last_committed: %lld)\n",
1954 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1955 next_transno, queue_len, completed, connected,
1956 req_transno, update_transno, obd->obd_last_committed);
1957 obd->obd_next_recovery_transno = req_transno;
1959 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1960 CDEBUG(D_HA, "waking for completed recovery\n");
1962 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1963 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1964 " by fail_lock, waking up (%lld)\n", next_transno);
1965 obd->obd_next_recovery_transno = req_transno;
1968 spin_unlock(&obd->obd_recovery_task_lock);
1972 static int check_for_next_lock(struct lu_target *lut)
1974 struct obd_device *obd = lut->lut_obd;
1977 spin_lock(&obd->obd_recovery_task_lock);
1978 if (!list_empty(&obd->obd_lock_replay_queue)) {
1979 CDEBUG(D_HA, "waking for next lock\n");
1981 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1982 CDEBUG(D_HA, "waking for completed lock replay\n");
1984 } else if (obd->obd_abort_recovery) {
1985 CDEBUG(D_HA, "waking for aborted recovery\n");
1987 } else if (obd->obd_recovery_expired) {
1988 CDEBUG(D_HA, "waking for expired recovery\n");
1991 spin_unlock(&obd->obd_recovery_task_lock);
1997 * wait for recovery events,
1998 * check its status with help of check_routine
1999 * evict dead clients via health_check
2001 static int target_recovery_overseer(struct lu_target *lut,
2002 int (*check_routine)(struct lu_target *),
2003 int (*health_check)(struct obd_export *))
2005 struct obd_device *obd = lut->lut_obd;
2006 struct target_distribute_txn_data *tdtd;
2008 if ((obd->obd_recovery_start != 0) && (cfs_time_current_sec() >=
2009 (obd->obd_recovery_start + obd->obd_recovery_time_hard))) {
2010 __u64 next_update_transno = 0;
2012 /* Only abort the recovery if there are no update recovery
2013 * left in the queue */
2014 spin_lock(&obd->obd_recovery_task_lock);
2015 if (lut->lut_tdtd != NULL) {
2016 next_update_transno =
2017 distribute_txn_get_next_transno(lut->lut_tdtd);
2019 tdtd = lut->lut_tdtd;
2020 /* If next_update_transno == 0, it probably because
2021 * updatelog retrieve threads did not get any records
2022 * yet, let's wait those threads stopped */
2023 if (next_update_transno == 0) {
2024 struct l_wait_info lwi = { 0 };
2026 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2028 &tdtd->tdtd_recovery_threads_count) == 0,
2031 next_update_transno =
2032 distribute_txn_get_next_transno(
2037 if (next_update_transno != 0 && !obd->obd_abort_recovery) {
2038 obd->obd_next_recovery_transno = next_update_transno;
2039 spin_unlock(&obd->obd_recovery_task_lock);
2040 /* Disconnect unfinished exports from clients, and
2041 * keep connection from MDT to make sure the update
2042 * recovery will still keep trying until some one
2043 * manually abort the recovery */
2044 class_disconnect_stale_exports(obd,
2045 exp_finished_or_from_mdt);
2046 /* Abort all of replay and replay lock req from
2048 abort_req_replay_queue(obd);
2049 abort_lock_replay_queue(obd);
2050 CDEBUG(D_HA, "%s: there are still update replay (%#llx"
2051 ")in the queue.\n", obd->obd_name,
2052 next_update_transno);
2054 obd->obd_abort_recovery = 1;
2055 spin_unlock(&obd->obd_recovery_task_lock);
2056 CWARN("%s recovery is aborted by hard timeout\n",
2061 while (wait_event_timeout(obd->obd_next_transno_waitq,
2063 msecs_to_jiffies(60 * MSEC_PER_SEC)) == 0)
2064 /* wait indefinitely for event, but don't trigger watchdog */;
2066 if (obd->obd_abort_recovery) {
2067 CWARN("recovery is aborted, evict exports in recovery\n");
2068 if (lut->lut_tdtd != NULL) {
2069 struct l_wait_info lwi = { 0 };
2071 tdtd = lut->lut_tdtd;
2072 /* Let's wait all of the update log recovery thread
2074 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2075 atomic_read(&tdtd->tdtd_recovery_threads_count) == 0,
2077 /* Then abort the update recovery list */
2078 dtrq_list_destroy(lut->lut_tdtd);
2081 /** evict exports which didn't finish recovery yet */
2082 class_disconnect_stale_exports(obd, exp_finished);
2084 } else if (obd->obd_recovery_expired) {
2085 obd->obd_recovery_expired = 0;
2086 /** If some clients died being recovered, evict them */
2087 LCONSOLE_WARN("%s: recovery is timed out, "
2088 "evict stale exports\n", obd->obd_name);
2089 /** evict cexports with no replay in queue, they are stalled */
2090 class_disconnect_stale_exports(obd, health_check);
2092 /** continue with VBR */
2093 spin_lock(&obd->obd_dev_lock);
2094 obd->obd_version_recov = 1;
2095 spin_unlock(&obd->obd_dev_lock);
2097 * reset timer, recovery will proceed with versions now,
2098 * timeout is set just to handle reconnection delays
2100 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
2101 /** Wait for recovery events again, after evicting bad clients */
2107 static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
2109 struct obd_device *obd = lut->lut_obd;
2110 struct ptlrpc_request *req = NULL;
2112 CDEBUG(D_HA, "Waiting for lock\n");
2113 if (target_recovery_overseer(lut, check_for_next_lock,
2114 exp_lock_replay_healthy))
2115 abort_lock_replay_queue(obd);
2117 spin_lock(&obd->obd_recovery_task_lock);
2118 if (!list_empty(&obd->obd_lock_replay_queue)) {
2119 req = list_entry(obd->obd_lock_replay_queue.next,
2120 struct ptlrpc_request, rq_list);
2121 list_del_init(&req->rq_list);
2122 spin_unlock(&obd->obd_recovery_task_lock);
2124 spin_unlock(&obd->obd_recovery_task_lock);
2125 LASSERT(list_empty(&obd->obd_lock_replay_queue));
2126 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
2127 /** evict exports failed VBR */
2128 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2133 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
2135 struct ptlrpc_request *req = NULL;
2137 spin_lock(&obd->obd_recovery_task_lock);
2138 if (!list_empty(&obd->obd_final_req_queue)) {
2139 req = list_entry(obd->obd_final_req_queue.next,
2140 struct ptlrpc_request, rq_list);
2141 list_del_init(&req->rq_list);
2142 spin_unlock(&obd->obd_recovery_task_lock);
2143 if (req->rq_export->exp_in_recovery) {
2144 spin_lock(&req->rq_export->exp_lock);
2145 req->rq_export->exp_in_recovery = 0;
2146 spin_unlock(&req->rq_export->exp_lock);
2149 spin_unlock(&obd->obd_recovery_task_lock);
2154 static void handle_recovery_req(struct ptlrpc_thread *thread,
2155 struct ptlrpc_request *req,
2156 svc_handler_t handler)
2161 * export can be evicted during recovery, no need to handle replays for
2162 * it after that, discard such request silently
2164 if (req->rq_export->exp_disconnected)
2167 req->rq_session.lc_thread = thread;
2168 req->rq_svc_thread = thread;
2169 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
2171 /* thread context */
2172 lu_context_enter(&thread->t_env->le_ctx);
2174 lu_context_exit(&thread->t_env->le_ctx);
2176 /* don't reset timer for final stage */
2177 if (!exp_finished(req->rq_export)) {
2178 int to = obd_timeout;
2181 * Add request timeout to the recovery time so next request from
2182 * this client may come in recovery time
2185 struct ptlrpc_service_part *svcpt;
2187 svcpt = req->rq_rqbd->rqbd_svcpt;
2188 /* If the server sent early reply for this request,
2189 * the client will recalculate the timeout according to
2190 * current server estimate service time, so we will
2191 * use the maxium timeout here for waiting the client
2192 * sending the next req */
2193 to = max((int)at_est2timeout(
2194 at_get(&svcpt->scp_at_estimate)),
2195 (int)lustre_msg_get_timeout(req->rq_reqmsg));
2196 /* Add 2 net_latency, one for balance rq_deadline
2197 * (see ptl_send_rpc), one for resend the req to server,
2198 * Note: client will pack net_latency in replay req
2199 * (see ptlrpc_replay_req) */
2200 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
2202 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
2207 /** Checking routines for recovery */
2208 static int check_for_recovery_ready(struct lu_target *lut)
2210 struct obd_device *obd = lut->lut_obd;
2211 unsigned int clnts = atomic_read(&obd->obd_connected_clients);
2213 CDEBUG(D_HA, "connected %d stale %d max_recoverable_clients %d"
2214 " abort %d expired %d\n", clnts, obd->obd_stale_clients,
2215 obd->obd_max_recoverable_clients, obd->obd_abort_recovery,
2216 obd->obd_recovery_expired);
2218 if (!obd->obd_abort_recovery && !obd->obd_recovery_expired) {
2219 LASSERT(clnts <= obd->obd_max_recoverable_clients);
2220 if (clnts + obd->obd_stale_clients <
2221 obd->obd_max_recoverable_clients)
2225 if (lut->lut_tdtd != NULL) {
2226 if (!lut->lut_tdtd->tdtd_replay_ready &&
2227 !obd->obd_abort_recovery) {
2228 /* Let's extend recovery timer, in case the recovery
2229 * timer expired, and some clients got evicted */
2230 extend_recovery_timer(obd, obd->obd_recovery_timeout,
2232 CDEBUG(D_HA, "%s update recovery is not ready,"
2233 " extend recovery %d\n", obd->obd_name,
2234 obd->obd_recovery_timeout);
2243 REQUEST_RECOVERY = 1,
2244 UPDATE_RECOVERY = 2,
2247 static __u64 get_next_replay_req_transno(struct obd_device *obd)
2251 if (!list_empty(&obd->obd_req_replay_queue)) {
2252 struct ptlrpc_request *req;
2254 req = list_entry(obd->obd_req_replay_queue.next,
2255 struct ptlrpc_request, rq_list);
2256 transno = lustre_msg_get_transno(req->rq_reqmsg);
2262 static __u64 get_next_transno(struct lu_target *lut, int *type)
2264 struct obd_device *obd = lut->lut_obd;
2265 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2267 __u64 update_transno;
2270 transno = get_next_replay_req_transno(obd);
2272 *type = REQUEST_RECOVERY;
2277 update_transno = distribute_txn_get_next_transno(tdtd);
2278 if (transno == 0 || (transno >= update_transno &&
2279 update_transno != 0)) {
2280 transno = update_transno;
2282 *type = UPDATE_RECOVERY;
2289 * drop duplicate replay request
2291 * Because the operation has been replayed by update recovery, the request
2292 * with the same transno will be dropped and also notify the client to send
2293 * next replay request.
2295 * \param[in] env execution environment
2296 * \param[in] obd failover obd device
2297 * \param[in] req request to be dropped
2299 static void drop_duplicate_replay_req(struct lu_env *env,
2300 struct obd_device *obd,
2301 struct ptlrpc_request *req)
2303 DEBUG_REQ(D_HA, req, "remove t%lld from %s because of duplicate"
2304 " update records are found.\n",
2305 lustre_msg_get_transno(req->rq_reqmsg),
2306 libcfs_nid2str(req->rq_peer.nid));
2308 /* Right now, only for MDS reint operation update replay and
2309 * normal request replay can have the same transno */
2310 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT) {
2311 req_capsule_set(&req->rq_pill, &RQF_MDS_REINT);
2312 req->rq_status = req_capsule_server_pack(&req->rq_pill);
2313 if (likely(req->rq_export))
2314 target_committed_to_req(req);
2315 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
2316 target_send_reply(req, req->rq_status, 0);
2318 DEBUG_REQ(D_ERROR, req, "wrong opc" "from %s\n",
2319 libcfs_nid2str(req->rq_peer.nid));
2321 target_exp_dequeue_req_replay(req);
2322 target_request_copy_put(req);
2323 obd->obd_replayed_requests++;
2326 static void replay_request_or_update(struct lu_env *env,
2327 struct lu_target *lut,
2328 struct target_recovery_data *trd,
2329 struct ptlrpc_thread *thread)
2331 struct obd_device *obd = lut->lut_obd;
2332 struct ptlrpc_request *req = NULL;
2337 CDEBUG(D_HA, "Waiting for transno %lld\n",
2338 obd->obd_next_recovery_transno);
2340 /* Replay all of request and update by transno */
2342 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2344 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_DELAY2, cfs_fail_val);
2346 /** It is needed to extend recovery window above
2347 * recovery_time_soft. Extending is possible only in the
2348 * end of recovery window (see more details in
2349 * handle_recovery_req()).
2351 CFS_FAIL_TIMEOUT_MS(OBD_FAIL_TGT_REPLAY_DELAY, 300);
2353 if (target_recovery_overseer(lut, check_for_next_transno,
2354 exp_req_replay_healthy_or_from_mdt)) {
2355 abort_req_replay_queue(obd);
2356 abort_lock_replay_queue(obd);
2360 spin_lock(&obd->obd_recovery_task_lock);
2361 transno = get_next_transno(lut, &type);
2362 if (type == REQUEST_RECOVERY && transno != 0) {
2363 /* Drop replay request from client side, if the
2364 * replay has been executed by update with the
2366 req = list_entry(obd->obd_req_replay_queue.next,
2367 struct ptlrpc_request, rq_list);
2369 list_del_init(&req->rq_list);
2370 obd->obd_requests_queued_for_recovery--;
2371 spin_unlock(&obd->obd_recovery_task_lock);
2373 /* Let's check if the request has been redone by
2375 if (is_req_replayed_by_update(req)) {
2376 struct distribute_txn_replay_req *dtrq;
2378 dtrq = distribute_txn_lookup_finish_list(tdtd,
2380 LASSERT(dtrq != NULL);
2381 spin_lock(&tdtd->tdtd_replay_list_lock);
2382 list_del_init(&dtrq->dtrq_list);
2383 spin_unlock(&tdtd->tdtd_replay_list_lock);
2386 drop_duplicate_replay_req(env, obd, req);
2391 LASSERT(trd->trd_processing_task == current_pid());
2392 DEBUG_REQ(D_HA, req, "processing t%lld from %s",
2393 lustre_msg_get_transno(req->rq_reqmsg),
2394 libcfs_nid2str(req->rq_peer.nid));
2396 handle_recovery_req(thread, req,
2397 trd->trd_recovery_handler);
2399 * bz18031: increase next_recovery_transno before
2400 * target_request_copy_put() will drop exp_rpc reference
2402 spin_lock(&obd->obd_recovery_task_lock);
2403 obd->obd_next_recovery_transno++;
2404 spin_unlock(&obd->obd_recovery_task_lock);
2405 target_exp_dequeue_req_replay(req);
2406 target_request_copy_put(req);
2407 obd->obd_replayed_requests++;
2408 } else if (type == UPDATE_RECOVERY && transno != 0) {
2409 struct distribute_txn_replay_req *dtrq;
2412 spin_unlock(&obd->obd_recovery_task_lock);
2414 LASSERT(tdtd != NULL);
2415 dtrq = distribute_txn_get_next_req(tdtd);
2416 lu_context_enter(&thread->t_env->le_ctx);
2417 rc = tdtd->tdtd_replay_handler(env, tdtd, dtrq);
2418 lu_context_exit(&thread->t_env->le_ctx);
2419 extend_recovery_timer(obd, obd_timeout, true);
2421 if (rc == 0 && dtrq->dtrq_xid != 0) {
2422 CDEBUG(D_HA, "Move x%llu t%llu"
2423 " to finish list\n", dtrq->dtrq_xid,
2424 dtrq->dtrq_master_transno);
2426 /* Add it to the replay finish list */
2427 spin_lock(&tdtd->tdtd_replay_list_lock);
2428 list_add(&dtrq->dtrq_list,
2429 &tdtd->tdtd_replay_finish_list);
2430 spin_unlock(&tdtd->tdtd_replay_list_lock);
2432 spin_lock(&obd->obd_recovery_task_lock);
2433 if (transno == obd->obd_next_recovery_transno)
2434 obd->obd_next_recovery_transno++;
2436 obd->obd_next_recovery_transno)
2437 obd->obd_next_recovery_transno =
2439 spin_unlock(&obd->obd_recovery_task_lock);
2444 spin_unlock(&obd->obd_recovery_task_lock);
2446 LASSERT(list_empty(&obd->obd_req_replay_queue));
2447 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
2448 /** evict exports failed VBR */
2449 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2455 static int target_recovery_thread(void *arg)
2457 struct lu_target *lut = arg;
2458 struct obd_device *obd = lut->lut_obd;
2459 struct ptlrpc_request *req;
2460 struct target_recovery_data *trd = &obd->obd_recovery_data;
2461 unsigned long delta;
2463 struct ptlrpc_thread *thread = NULL;
2467 unshare_fs_struct();
2468 OBD_ALLOC_PTR(thread);
2474 OBD_FREE_PTR(thread);
2478 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2480 OBD_FREE_PTR(thread);
2485 thread->t_env = env;
2486 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2487 env->le_ctx.lc_thread = thread;
2488 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2489 thread->t_watchdog = NULL;
2491 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2493 trd->trd_processing_task = current_pid();
2495 spin_lock(&obd->obd_dev_lock);
2496 obd->obd_recovering = 1;
2497 spin_unlock(&obd->obd_dev_lock);
2498 complete(&trd->trd_starting);
2500 /* first of all, we have to know the first transno to replay */
2501 if (target_recovery_overseer(lut, check_for_recovery_ready,
2502 exp_connect_healthy)) {
2503 abort_req_replay_queue(obd);
2504 abort_lock_replay_queue(obd);
2505 if (lut->lut_tdtd != NULL)
2506 dtrq_list_destroy(lut->lut_tdtd);
2509 /* next stage: replay requests or update */
2511 CDEBUG(D_INFO, "1: request replay stage - %d clients from t%llu\n",
2512 atomic_read(&obd->obd_req_replay_clients),
2513 obd->obd_next_recovery_transno);
2514 replay_request_or_update(env, lut, trd, thread);
2517 * The second stage: replay locks
2519 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2520 atomic_read(&obd->obd_lock_replay_clients));
2521 while ((req = target_next_replay_lock(lut))) {
2522 LASSERT(trd->trd_processing_task == current_pid());
2523 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2524 libcfs_nid2str(req->rq_peer.nid));
2525 handle_recovery_req(thread, req,
2526 trd->trd_recovery_handler);
2527 target_request_copy_put(req);
2528 obd->obd_replayed_locks++;
2532 * The third stage: reply on final pings, at this moment all clients
2533 * must have request in final queue
2535 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
2536 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2537 /** Update server last boot epoch */
2538 tgt_boot_epoch_update(lut);
2539 /* We drop recoverying flag to forward all new requests
2540 * to regular mds_handle() since now */
2541 spin_lock(&obd->obd_dev_lock);
2542 obd->obd_recovering = obd->obd_abort_recovery = 0;
2543 spin_unlock(&obd->obd_dev_lock);
2544 spin_lock(&obd->obd_recovery_task_lock);
2545 target_cancel_recovery_timer(obd);
2546 spin_unlock(&obd->obd_recovery_task_lock);
2547 while ((req = target_next_final_ping(obd))) {
2548 LASSERT(trd->trd_processing_task == current_pid());
2549 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2550 libcfs_nid2str(req->rq_peer.nid));
2551 handle_recovery_req(thread, req,
2552 trd->trd_recovery_handler);
2553 /* Because the waiting client can not send ping to server,
2554 * so we need refresh the last_request_time, to avoid the
2555 * export is being evicted */
2556 ptlrpc_update_export_timer(req->rq_export, 0);
2557 target_request_copy_put(req);
2560 delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
2561 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2562 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2563 if (delta > OBD_RECOVERY_TIME_SOFT) {
2564 CWARN("too long recovery - read logs\n");
2565 libcfs_debug_dumplog();
2568 target_finish_recovery(lut);
2570 lu_context_fini(&env->le_ctx);
2571 trd->trd_processing_task = 0;
2572 complete(&trd->trd_finishing);
2574 tgt_io_thread_done(thread);
2575 OBD_FREE_PTR(thread);
2580 static int target_start_recovery_thread(struct lu_target *lut,
2581 svc_handler_t handler)
2583 struct obd_device *obd = lut->lut_obd;
2585 struct target_recovery_data *trd = &obd->obd_recovery_data;
2588 memset(trd, 0, sizeof(*trd));
2589 init_completion(&trd->trd_starting);
2590 init_completion(&trd->trd_finishing);
2591 trd->trd_recovery_handler = handler;
2593 rc = server_name2index(obd->obd_name, &index, NULL);
2597 if (!IS_ERR(kthread_run(target_recovery_thread,
2598 lut, "tgt_recover_%d", index))) {
2599 wait_for_completion(&trd->trd_starting);
2600 LASSERT(obd->obd_recovering != 0);
2608 void target_stop_recovery_thread(struct obd_device *obd)
2610 if (obd->obd_recovery_data.trd_processing_task > 0) {
2611 struct target_recovery_data *trd = &obd->obd_recovery_data;
2612 /** recovery can be done but postrecovery is not yet */
2613 spin_lock(&obd->obd_dev_lock);
2614 if (obd->obd_recovering) {
2615 CERROR("%s: Aborting recovery\n", obd->obd_name);
2616 obd->obd_abort_recovery = 1;
2617 wake_up(&obd->obd_next_transno_waitq);
2619 spin_unlock(&obd->obd_dev_lock);
2620 wait_for_completion(&trd->trd_finishing);
2623 EXPORT_SYMBOL(target_stop_recovery_thread);
2625 void target_recovery_fini(struct obd_device *obd)
2627 class_disconnect_exports(obd);
2628 target_stop_recovery_thread(obd);
2629 target_cleanup_recovery(obd);
2631 EXPORT_SYMBOL(target_recovery_fini);
2633 static void target_recovery_expired(unsigned long castmeharder)
2635 struct obd_device *obd = (struct obd_device *)castmeharder;
2636 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2637 " after %lds (%d clients connected)\n",
2638 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
2639 cfs_time_current_sec()- obd->obd_recovery_start,
2640 atomic_read(&obd->obd_connected_clients));
2642 obd->obd_recovery_expired = 1;
2643 wake_up(&obd->obd_next_transno_waitq);
2646 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2648 struct obd_device *obd = lut->lut_obd;
2650 if (obd->obd_max_recoverable_clients == 0) {
2651 /** Update server last boot epoch */
2652 tgt_boot_epoch_update(lut);
2656 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2657 "last_transno %llu\n", obd->obd_name,
2658 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2659 LASSERT(obd->obd_stopping == 0);
2660 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2661 obd->obd_recovery_start = 0;
2662 obd->obd_recovery_end = 0;
2664 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2665 target_start_recovery_thread(lut, handler);
2667 EXPORT_SYMBOL(target_recovery_init);
2669 static int target_process_req_flags(struct obd_device *obd,
2670 struct ptlrpc_request *req)
2672 struct obd_export *exp = req->rq_export;
2673 LASSERT(exp != NULL);
2674 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2675 /* client declares he's ready to replay locks */
2676 spin_lock(&exp->exp_lock);
2677 if (exp->exp_req_replay_needed) {
2678 exp->exp_req_replay_needed = 0;
2679 spin_unlock(&exp->exp_lock);
2681 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2682 atomic_dec(&obd->obd_req_replay_clients);
2684 spin_unlock(&exp->exp_lock);
2687 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2688 /* client declares he's ready to complete recovery
2689 * so, we put the request on th final queue */
2690 spin_lock(&exp->exp_lock);
2691 if (exp->exp_lock_replay_needed) {
2692 exp->exp_lock_replay_needed = 0;
2693 spin_unlock(&exp->exp_lock);
2695 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2696 atomic_dec(&obd->obd_lock_replay_clients);
2698 spin_unlock(&exp->exp_lock);
2704 int target_queue_recovery_request(struct ptlrpc_request *req,
2705 struct obd_device *obd)
2707 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2708 struct ptlrpc_request *reqiter;
2712 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2713 /* Processing the queue right now, don't re-add. */
2717 target_process_req_flags(obd, req);
2719 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2720 /* client declares he's ready to complete recovery
2721 * so, we put the request on th final queue */
2722 target_request_copy_get(req);
2723 DEBUG_REQ(D_HA, req, "queue final req");
2724 wake_up(&obd->obd_next_transno_waitq);
2725 spin_lock(&obd->obd_recovery_task_lock);
2726 if (obd->obd_recovering) {
2727 struct ptlrpc_request *tmp;
2728 struct ptlrpc_request *duplicate = NULL;
2730 if (likely(!req->rq_export->exp_replay_done)) {
2731 req->rq_export->exp_replay_done = 1;
2732 list_add_tail(&req->rq_list,
2733 &obd->obd_final_req_queue);
2734 spin_unlock(&obd->obd_recovery_task_lock);
2738 /* XXX O(n), but only happens if final ping is
2739 * timed out, probably reorganize the list as
2740 * a hash list later */
2741 list_for_each_entry_safe(reqiter, tmp,
2742 &obd->obd_final_req_queue,
2744 if (reqiter->rq_export == req->rq_export) {
2745 list_del_init(&reqiter->rq_list);
2746 duplicate = reqiter;
2751 list_add_tail(&req->rq_list,
2752 &obd->obd_final_req_queue);
2753 req->rq_export->exp_replay_done = 1;
2754 spin_unlock(&obd->obd_recovery_task_lock);
2756 if (duplicate != NULL) {
2757 DEBUG_REQ(D_HA, duplicate,
2758 "put prev final req\n");
2759 target_request_copy_put(duplicate);
2763 spin_unlock(&obd->obd_recovery_task_lock);
2764 target_request_copy_put(req);
2765 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2768 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2769 /* client declares he's ready to replay locks */
2770 target_request_copy_get(req);
2771 DEBUG_REQ(D_HA, req, "queue lock replay req");
2772 wake_up(&obd->obd_next_transno_waitq);
2773 spin_lock(&obd->obd_recovery_task_lock);
2774 LASSERT(obd->obd_recovering);
2775 /* usually due to recovery abort */
2776 if (!req->rq_export->exp_in_recovery) {
2777 spin_unlock(&obd->obd_recovery_task_lock);
2778 target_request_copy_put(req);
2781 LASSERT(req->rq_export->exp_lock_replay_needed);
2782 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2783 spin_unlock(&obd->obd_recovery_task_lock);
2787 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2788 * (i.e. buflens etc are in my own byte order), but type-dependent
2789 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2792 INIT_LIST_HEAD(&req->rq_list);
2793 DEBUG_REQ(D_HA, req, "not queueing");
2797 /* If we're processing the queue, we want don't want to queue this
2800 * Also, if this request has a transno less than the one we're waiting
2801 * for, we should process it now. It could (and currently always will)
2802 * be an open request for a descriptor that was opened some time ago.
2804 * Also, a resent, replayed request that has already been
2805 * handled will pass through here and be processed immediately.
2807 CDEBUG(D_HA, "Next recovery transno: %llu"
2808 ", current: %llu, replaying\n",
2809 obd->obd_next_recovery_transno, transno);
2811 /* If the request has been replayed by update replay, then sends this
2812 * request to the recovery thread (replay_request_or_update()), where
2813 * it will be handled */
2814 spin_lock(&obd->obd_recovery_task_lock);
2815 if (transno < obd->obd_next_recovery_transno &&
2816 !is_req_replayed_by_update(req)) {
2817 /* Processing the queue right now, don't re-add. */
2818 LASSERT(list_empty(&req->rq_list));
2819 spin_unlock(&obd->obd_recovery_task_lock);
2822 spin_unlock(&obd->obd_recovery_task_lock);
2824 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2827 target_request_copy_get(req);
2828 if (!req->rq_export->exp_in_recovery) {
2829 target_request_copy_put(req);
2832 LASSERT(req->rq_export->exp_req_replay_needed);
2834 if (target_exp_enqueue_req_replay(req)) {
2835 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2836 target_request_copy_put(req);
2841 spin_lock(&obd->obd_recovery_task_lock);
2842 LASSERT(obd->obd_recovering);
2843 list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
2844 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2845 list_add_tail(&req->rq_list, &reqiter->rq_list);
2850 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2852 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2853 "has been claimed by another client");
2854 spin_unlock(&obd->obd_recovery_task_lock);
2855 target_exp_dequeue_req_replay(req);
2856 target_request_copy_put(req);
2862 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2864 obd->obd_requests_queued_for_recovery++;
2865 spin_unlock(&obd->obd_recovery_task_lock);
2866 wake_up(&obd->obd_next_transno_waitq);
2870 int target_handle_ping(struct ptlrpc_request *req)
2872 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2873 return req_capsule_server_pack(&req->rq_pill);
2876 void target_committed_to_req(struct ptlrpc_request *req)
2878 struct obd_export *exp = req->rq_export;
2880 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2881 lustre_msg_set_last_committed(req->rq_repmsg,
2882 exp->exp_last_committed);
2884 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2885 "%d)", exp->exp_obd->obd_no_transno,
2886 req->rq_repmsg == NULL);
2888 CDEBUG(D_INFO, "last_committed %llu, transno %llu, xid %llu\n",
2889 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2892 #endif /* HAVE_SERVER_SUPPORT */
2895 * Packs current SLV and Limit into \a req.
2897 int target_pack_pool_reply(struct ptlrpc_request *req)
2899 struct obd_device *obd;
2902 /* Check that we still have all structures alive as this may
2903 * be some late RPC at shutdown time. */
2904 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2905 !exp_connect_lru_resize(req->rq_export))) {
2906 lustre_msg_set_slv(req->rq_repmsg, 0);
2907 lustre_msg_set_limit(req->rq_repmsg, 0);
2911 /* OBD is alive here as export is alive, which we checked above. */
2912 obd = req->rq_export->exp_obd;
2914 read_lock(&obd->obd_pool_lock);
2915 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2916 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2917 read_unlock(&obd->obd_pool_lock);
2922 static int target_send_reply_msg(struct ptlrpc_request *req,
2923 int rc, int fail_id)
2925 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2926 DEBUG_REQ(D_ERROR, req, "dropping reply");
2929 /* We can have a null rq_reqmsg in the event of bad signature or
2930 * no context when unwrapping */
2931 if (req->rq_reqmsg &&
2932 unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
2933 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
2937 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2938 req->rq_status = rc;
2939 return ptlrpc_send_error(req, 1);
2941 DEBUG_REQ(D_NET, req, "sending reply");
2944 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
2947 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2949 struct ptlrpc_service_part *svcpt;
2951 struct ptlrpc_reply_state *rs;
2952 struct obd_export *exp;
2955 if (req->rq_no_reply) {
2960 svcpt = req->rq_rqbd->rqbd_svcpt;
2961 rs = req->rq_reply_state;
2962 if (rs == NULL || !rs->rs_difficult) {
2964 target_send_reply_msg (req, rc, fail_id);
2969 /* must be an export if locks saved */
2970 LASSERT(req->rq_export != NULL);
2971 /* req/reply consistent */
2972 LASSERT(rs->rs_svcpt == svcpt);
2975 LASSERT(!rs->rs_scheduled);
2976 LASSERT(!rs->rs_scheduled_ever);
2977 LASSERT(!rs->rs_handled);
2978 LASSERT(!rs->rs_on_net);
2979 LASSERT(rs->rs_export == NULL);
2980 LASSERT(list_empty(&rs->rs_obd_list));
2981 LASSERT(list_empty(&rs->rs_exp_list));
2983 exp = class_export_get(req->rq_export);
2985 /* disable reply scheduling while I'm setting up */
2986 rs->rs_scheduled = 1;
2988 rs->rs_xid = req->rq_xid;
2989 rs->rs_transno = req->rq_transno;
2990 rs->rs_export = exp;
2991 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2993 spin_lock(&exp->exp_uncommitted_replies_lock);
2994 CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
2995 rs->rs_transno, exp->exp_last_committed);
2996 if (rs->rs_transno > exp->exp_last_committed) {
2997 /* not committed already */
2998 list_add_tail(&rs->rs_obd_list,
2999 &exp->exp_uncommitted_replies);
3001 spin_unlock(&exp->exp_uncommitted_replies_lock);
3003 spin_lock(&exp->exp_lock);
3004 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
3005 spin_unlock(&exp->exp_lock);
3007 netrc = target_send_reply_msg(req, rc, fail_id);
3009 spin_lock(&svcpt->scp_rep_lock);
3011 atomic_inc(&svcpt->scp_nreps_difficult);
3014 /* error sending: reply is off the net. Also we need +1
3015 * reply ref until ptlrpc_handle_rs() is done
3016 * with the reply state (if the send was successful, there
3017 * would have been +1 ref for the net, which
3018 * reply_out_callback leaves alone) */
3020 ptlrpc_rs_addref(rs);
3023 spin_lock(&rs->rs_lock);
3024 if (rs->rs_transno <= exp->exp_last_committed ||
3025 (!rs->rs_on_net && !rs->rs_no_ack) ||
3026 list_empty(&rs->rs_exp_list) || /* completed already */
3027 list_empty(&rs->rs_obd_list)) {
3028 CDEBUG(D_HA, "Schedule reply immediately\n");
3029 ptlrpc_dispatch_difficult_reply(rs);
3031 list_add(&rs->rs_list, &svcpt->scp_rep_active);
3032 rs->rs_scheduled = 0; /* allow notifier to schedule */
3034 spin_unlock(&rs->rs_lock);
3035 spin_unlock(&svcpt->scp_rep_lock);
3039 enum ldlm_mode lck_compat_array[] = {
3040 [LCK_EX] = LCK_COMPAT_EX,
3041 [LCK_PW] = LCK_COMPAT_PW,
3042 [LCK_PR] = LCK_COMPAT_PR,
3043 [LCK_CW] = LCK_COMPAT_CW,
3044 [LCK_CR] = LCK_COMPAT_CR,
3045 [LCK_NL] = LCK_COMPAT_NL,
3046 [LCK_GROUP] = LCK_COMPAT_GROUP,
3047 [LCK_COS] = LCK_COMPAT_COS,
3051 * Rather arbitrary mapping from LDLM error codes to errno values. This should
3052 * not escape to the user level.
3054 int ldlm_error2errno(enum ldlm_error error)
3060 case ELDLM_LOCK_MATCHED:
3063 case ELDLM_LOCK_CHANGED:
3066 case ELDLM_LOCK_ABORTED:
3069 case ELDLM_LOCK_REPLACED:
3072 case ELDLM_NO_LOCK_DATA:
3075 case ELDLM_NAMESPACE_EXISTS:
3078 case ELDLM_BAD_NAMESPACE:
3082 if (((int)error) < 0) { /* cast to signed type */
3083 result = error; /* as ldlm_error can be unsigned */
3085 CERROR("Invalid DLM result code: %d\n", error);
3091 EXPORT_SYMBOL(ldlm_error2errno);
3094 * Dual to ldlm_error2errno(): maps errno values back to enum ldlm_error.
3096 enum ldlm_error ldlm_errno2error(int err_no)
3105 error = ELDLM_LOCK_CHANGED;
3108 error = ELDLM_LOCK_ABORTED;
3111 error = ELDLM_LOCK_REPLACED;
3114 error = ELDLM_NO_LOCK_DATA;
3117 error = ELDLM_NAMESPACE_EXISTS;
3120 error = ELDLM_BAD_NAMESPACE;
3128 #if LUSTRE_TRACKS_LOCK_EXP_REFS
3129 void ldlm_dump_export_locks(struct obd_export *exp)
3131 spin_lock(&exp->exp_locks_list_guard);
3132 if (!list_empty(&exp->exp_locks_list)) {
3133 struct ldlm_lock *lock;
3135 CERROR("dumping locks for export %p,"
3136 "ignore if the unmount doesn't hang\n", exp);
3137 list_for_each_entry(lock, &exp->exp_locks_list,
3139 LDLM_ERROR(lock, "lock:");
3141 spin_unlock(&exp->exp_locks_list_guard);
3145 #ifdef HAVE_SERVER_SUPPORT
3146 static int target_bulk_timeout(void *data)
3149 /* We don't fail the connection here, because having the export
3150 * killed makes the (vital) call to commitrw very sad.
3155 static inline const char *bulk2type(struct ptlrpc_request *req)
3157 if (req->rq_bulk_read)
3159 if (req->rq_bulk_write)
3164 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
3165 struct l_wait_info *lwi)
3167 struct ptlrpc_request *req = desc->bd_req;
3168 time_t start = cfs_time_current_sec();
3174 /* If there is eviction in progress, wait for it to finish. */
3175 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
3176 *lwi = LWI_INTR(NULL, NULL);
3177 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
3178 !atomic_read(&exp->exp_obd->
3179 obd_evict_inprogress),
3183 /* Check if client was evicted or reconnected already. */
3184 if (exp->exp_failed ||
3185 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3188 if (req->rq_bulk_read)
3189 rc = sptlrpc_svc_wrap_bulk(req, desc);
3191 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
3192 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
3193 else /* old version, bulk matchbits is rq_xid */
3194 req->rq_mbits = req->rq_xid;
3197 rc = ptlrpc_start_bulk_transfer(desc);
3201 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
3202 bulk2type(req), rc);
3206 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
3207 ptlrpc_abort_bulk(desc);
3211 /* limit actual bulk transfer to bulk_timeout seconds */
3212 deadline = start + bulk_timeout;
3213 if (deadline > req->rq_deadline)
3214 deadline = req->rq_deadline;
3217 long timeoutl = deadline - cfs_time_current_sec();
3218 cfs_duration_t timeout = timeoutl <= 0 ?
3219 CFS_TICK : cfs_time_seconds(timeoutl);
3222 *lwi = LWI_TIMEOUT_INTERVAL(timeout, cfs_time_seconds(1),
3223 target_bulk_timeout, desc);
3224 rc = l_wait_event(desc->bd_waitq,
3225 !ptlrpc_server_bulk_active(desc) ||
3228 lustre_msg_get_conn_cnt(req->rq_reqmsg),
3230 LASSERT(rc == 0 || rc == -ETIMEDOUT);
3231 /* Wait again if we changed rq_deadline. */
3232 rq_deadline = ACCESS_ONCE(req->rq_deadline);
3233 deadline = start + bulk_timeout;
3234 if (deadline > rq_deadline)
3235 deadline = rq_deadline;
3236 } while ((rc == -ETIMEDOUT) &&
3237 (deadline > cfs_time_current_sec()));
3239 if (rc == -ETIMEDOUT) {
3240 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %ld%+lds",
3241 bulk2type(req), deadline - start,
3242 cfs_time_current_sec() - deadline);
3243 ptlrpc_abort_bulk(desc);
3244 } else if (exp->exp_failed) {
3245 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
3248 ptlrpc_abort_bulk(desc);
3249 } else if (exp->exp_conn_cnt >
3250 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3251 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
3253 /* We don't reply anyway. */
3255 ptlrpc_abort_bulk(desc);
3256 } else if (desc->bd_failure) {
3257 DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
3259 /* XXX should this be a different errno? */
3262 if (req->rq_bulk_write)
3263 rc = sptlrpc_svc_unwrap_bulk(req, desc);
3264 if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
3265 DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
3266 bulk2type(req), desc->bd_nob_transferred,
3268 /* XXX should this be a different errno? */
3275 EXPORT_SYMBOL(target_bulk_io);
3277 #endif /* HAVE_SERVER_SUPPORT */