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, 2017, 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 <cl_object.h>
43 #include <linux/jiffies.h>
44 #include <linux/kthread.h>
45 #include <libcfs/libcfs.h>
47 #include <obd_class.h>
48 #include <lustre_dlm.h>
49 #include <lustre_net.h>
50 #include <lustre_sec.h>
51 #include "ldlm_internal.h"
53 /* @priority: If non-zero, move the selected connection to the list head.
54 * @create: If zero, only search in existing connections.
56 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
57 int priority, int create)
59 struct ptlrpc_connection *ptlrpc_conn;
60 struct obd_import_conn *imp_conn = NULL, *item;
61 lnet_nid_t nid4refnet = LNET_NID_ANY;
65 if (!create && !priority) {
66 CDEBUG(D_HA, "Nothing to do\n");
70 if (imp->imp_connection &&
71 imp->imp_connection->c_remote_uuid.uuid[0] == 0)
72 /* nid4refnet is used to restrict network connections */
73 nid4refnet = imp->imp_connection->c_self;
74 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid, nid4refnet);
76 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
81 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
83 GOTO(out_put, rc = -ENOMEM);
86 spin_lock(&imp->imp_lock);
87 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
88 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
90 list_del(&item->oic_item);
91 list_add(&item->oic_item,
93 item->oic_last_attempt = 0;
95 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
96 imp, imp->imp_obd->obd_name, uuid->uuid,
97 (priority ? ", moved to head" : ""));
98 spin_unlock(&imp->imp_lock);
99 GOTO(out_free, rc = 0);
102 /* No existing import connection found for \a uuid. */
104 imp_conn->oic_conn = ptlrpc_conn;
105 imp_conn->oic_uuid = *uuid;
106 imp_conn->oic_last_attempt = 0;
108 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
110 list_add_tail(&imp_conn->oic_item,
111 &imp->imp_conn_list);
112 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
113 imp, imp->imp_obd->obd_name, uuid->uuid,
114 (priority ? "head" : "tail"));
116 spin_unlock(&imp->imp_lock);
117 GOTO(out_free, rc = -ENOENT);
120 spin_unlock(&imp->imp_lock);
124 OBD_FREE(imp_conn, sizeof(*imp_conn));
126 ptlrpc_connection_put(ptlrpc_conn);
130 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
132 return import_set_conn(imp, uuid, 1, 0);
135 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
138 return import_set_conn(imp, uuid, priority, 1);
140 EXPORT_SYMBOL(client_import_add_conn);
142 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
144 struct obd_import_conn *imp_conn;
145 struct obd_export *dlmexp;
149 spin_lock(&imp->imp_lock);
150 if (list_empty(&imp->imp_conn_list)) {
151 LASSERT(!imp->imp_connection);
155 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
156 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
158 LASSERT(imp_conn->oic_conn);
160 if (imp_conn == imp->imp_conn_current) {
161 LASSERT(imp_conn->oic_conn == imp->imp_connection);
163 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
164 imp->imp_state != LUSTRE_IMP_DISCON) {
165 CERROR("can't remove current connection\n");
166 GOTO(out, rc = -EBUSY);
169 ptlrpc_connection_put(imp->imp_connection);
170 imp->imp_connection = NULL;
172 dlmexp = class_conn2export(&imp->imp_dlm_handle);
173 if (dlmexp && dlmexp->exp_connection) {
174 LASSERT(dlmexp->exp_connection ==
176 ptlrpc_connection_put(dlmexp->exp_connection);
177 dlmexp->exp_connection = NULL;
181 class_export_put(dlmexp);
184 list_del(&imp_conn->oic_item);
185 ptlrpc_connection_put(imp_conn->oic_conn);
186 OBD_FREE(imp_conn, sizeof(*imp_conn));
187 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
188 imp, imp->imp_obd->obd_name, uuid->uuid);
193 spin_unlock(&imp->imp_lock);
195 CERROR("connection %s not found\n", uuid->uuid);
198 EXPORT_SYMBOL(client_import_del_conn);
201 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
202 * to find a conn uuid of \a imp which can reach \a peer.
204 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
205 struct obd_uuid *uuid)
207 struct obd_import_conn *conn;
211 spin_lock(&imp->imp_lock);
212 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
213 /* Check if conn UUID does have this peer NID. */
214 if (class_check_uuid(&conn->oic_uuid, peer)) {
215 *uuid = conn->oic_uuid;
220 spin_unlock(&imp->imp_lock);
223 EXPORT_SYMBOL(client_import_find_conn);
225 void client_destroy_import(struct obd_import *imp)
227 /* Drop security policy instance after all RPCs have finished/aborted
228 * to let all busy contexts be released. */
229 class_import_get(imp);
230 class_destroy_import(imp);
231 sptlrpc_import_sec_put(imp);
232 class_import_put(imp);
234 EXPORT_SYMBOL(client_destroy_import);
237 * Check whether or not the OSC is on MDT.
240 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
242 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
245 static int osc_on_mdt(char *obdname)
249 ptr = strrchr(obdname, '-');
253 if (strncmp(ptr + 1, "MDT", 3) == 0)
259 /* Configure an RPC client OBD device.
264 * 3 - inactive-on-startup
265 * 4 - restrictive net
267 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
269 struct client_obd *cli = &obddev->u.cli;
270 struct obd_import *imp;
271 struct obd_uuid server_uuid;
272 int rq_portal, rp_portal, connect_op;
273 char *name = obddev->obd_type->typ_name;
274 enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
275 char *cli_name = lustre_cfg_buf(lcfg, 0);
276 struct ptlrpc_connection fake_conn = { .c_self = 0,
277 .c_remote_uuid.uuid[0] = 0 };
281 /* In a more perfect world, we would hang a ptlrpc_client off of
282 * obd_type and just use the values from there. */
283 if (!strcmp(name, LUSTRE_OSC_NAME)) {
284 rq_portal = OST_REQUEST_PORTAL;
285 rp_portal = OSC_REPLY_PORTAL;
286 connect_op = OST_CONNECT;
287 cli->cl_sp_me = LUSTRE_SP_CLI;
288 cli->cl_sp_to = LUSTRE_SP_OST;
289 ns_type = LDLM_NS_TYPE_OSC;
290 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
291 !strcmp(name, LUSTRE_LWP_NAME)) {
292 rq_portal = MDS_REQUEST_PORTAL;
293 rp_portal = MDC_REPLY_PORTAL;
294 connect_op = MDS_CONNECT;
295 if (is_lwp_on_ost(cli_name))
296 cli->cl_sp_me = LUSTRE_SP_OST;
297 else if (is_lwp_on_mdt(cli_name))
298 cli->cl_sp_me = LUSTRE_SP_MDT;
300 cli->cl_sp_me = LUSTRE_SP_CLI;
301 cli->cl_sp_to = LUSTRE_SP_MDT;
302 ns_type = LDLM_NS_TYPE_MDC;
303 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
304 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
305 /* OSP_on_MDT for other MDTs */
306 connect_op = MDS_CONNECT;
307 cli->cl_sp_to = LUSTRE_SP_MDT;
308 ns_type = LDLM_NS_TYPE_MDC;
309 rq_portal = OUT_PORTAL;
311 /* OSP on MDT for OST */
312 connect_op = OST_CONNECT;
313 cli->cl_sp_to = LUSTRE_SP_OST;
314 ns_type = LDLM_NS_TYPE_OSC;
315 rq_portal = OST_REQUEST_PORTAL;
317 rp_portal = OSC_REPLY_PORTAL;
318 cli->cl_sp_me = LUSTRE_SP_MDT;
319 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
320 rq_portal = MGS_REQUEST_PORTAL;
321 rp_portal = MGC_REPLY_PORTAL;
322 connect_op = MGS_CONNECT;
323 cli->cl_sp_me = LUSTRE_SP_MGC;
324 cli->cl_sp_to = LUSTRE_SP_MGS;
325 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
326 ns_type = LDLM_NS_TYPE_MGC;
328 CERROR("unknown client OBD type \"%s\", can't setup\n",
333 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
334 CERROR("requires a TARGET UUID\n");
338 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
339 CERROR("client UUID must be less than 38 characters\n");
343 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
344 CERROR("setup requires a SERVER UUID\n");
348 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
349 CERROR("target UUID must be less than 38 characters\n");
353 init_rwsem(&cli->cl_sem);
354 mutex_init(&cli->cl_mgc_mutex);
356 init_rwsem(&cli->cl_seq_rwsem);
357 cli->cl_conn_count = 0;
358 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
359 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
360 sizeof(server_uuid)));
362 cli->cl_dirty_pages = 0;
363 cli->cl_dirty_max_pages = 0;
364 cli->cl_avail_grant = 0;
365 /* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
366 /* cl_dirty_max_pages may be changed at connect time in
367 * ptlrpc_connect_interpret(). */
368 client_adjust_max_dirty(cli);
369 INIT_LIST_HEAD(&cli->cl_cache_waiters);
370 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
371 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
372 INIT_LIST_HEAD(&cli->cl_loi_write_list);
373 INIT_LIST_HEAD(&cli->cl_loi_read_list);
374 spin_lock_init(&cli->cl_loi_list_lock);
375 atomic_set(&cli->cl_pending_w_pages, 0);
376 atomic_set(&cli->cl_pending_r_pages, 0);
377 cli->cl_r_in_flight = 0;
378 cli->cl_w_in_flight = 0;
380 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
381 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
382 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
383 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
384 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
385 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
388 INIT_LIST_HEAD(&cli->cl_lru_osc);
389 atomic_set(&cli->cl_lru_shrinkers, 0);
390 atomic_long_set(&cli->cl_lru_busy, 0);
391 atomic_long_set(&cli->cl_lru_in_list, 0);
392 INIT_LIST_HEAD(&cli->cl_lru_list);
393 spin_lock_init(&cli->cl_lru_list_lock);
394 atomic_long_set(&cli->cl_unstable_count, 0);
395 INIT_LIST_HEAD(&cli->cl_shrink_list);
396 INIT_LIST_HEAD(&cli->cl_grant_chain);
398 INIT_LIST_HEAD(&cli->cl_flight_waiters);
399 cli->cl_rpcs_in_flight = 0;
401 init_waitqueue_head(&cli->cl_destroy_waitq);
402 atomic_set(&cli->cl_destroy_in_flight, 0);
404 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
405 #ifdef ENABLE_CHECKSUM
406 /* Turn on checksumming by default. */
407 cli->cl_checksum = 1;
409 * The supported checksum types will be worked out at connect time
410 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
413 cli->cl_cksum_type = cli->cl_supp_cksum_types;
415 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
417 /* Set it to possible maximum size. It may be reduced by ocd_brw_size
418 * from OFD after connecting. */
419 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
421 cli->cl_max_short_io_bytes = OBD_MAX_SHORT_IO_BYTES;
423 /* set cl_chunkbits default value to PAGE_SHIFT,
424 * it will be updated at OSC connection time. */
425 cli->cl_chunkbits = PAGE_SHIFT;
427 if (!strcmp(name, LUSTRE_MDC_NAME)) {
428 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
429 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
430 cli->cl_max_rpcs_in_flight = 2;
431 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
432 cli->cl_max_rpcs_in_flight = 3;
433 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
434 cli->cl_max_rpcs_in_flight = 4;
436 if (osc_on_mdt(obddev->obd_name))
437 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
439 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
442 spin_lock_init(&cli->cl_mod_rpcs_lock);
443 spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
444 cli->cl_max_mod_rpcs_in_flight = 0;
445 cli->cl_mod_rpcs_in_flight = 0;
446 cli->cl_close_rpcs_in_flight = 0;
447 init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
448 cli->cl_mod_tag_bitmap = NULL;
450 INIT_LIST_HEAD(&cli->cl_chg_dev_linkage);
452 if (connect_op == MDS_CONNECT) {
453 cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
454 OBD_ALLOC(cli->cl_mod_tag_bitmap,
455 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
456 if (cli->cl_mod_tag_bitmap == NULL)
457 GOTO(err, rc = -ENOMEM);
462 CERROR("ldlm_get_ref failed: %d\n", rc);
466 ptlrpc_init_client(rq_portal, rp_portal, name,
467 &obddev->obd_ldlm_client);
469 imp = class_new_import(obddev);
471 GOTO(err_ldlm, rc = -ENOENT);
472 imp->imp_client = &obddev->obd_ldlm_client;
473 imp->imp_connect_op = connect_op;
474 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
475 LUSTRE_CFG_BUFLEN(lcfg, 1));
476 class_import_put(imp);
478 if (lustre_cfg_buf(lcfg, 4)) {
479 __u32 refnet = libcfs_str2net(lustre_cfg_string(lcfg, 4));
481 if (refnet == LNET_NIDNET(LNET_NID_ANY)) {
483 CERROR("%s: bad mount option 'network=%s': rc = %d\n",
484 obddev->obd_name, lustre_cfg_string(lcfg, 4),
486 GOTO(err_import, rc);
488 fake_conn.c_self = LNET_MKNID(refnet, 0);
489 imp->imp_connection = &fake_conn;
492 rc = client_import_add_conn(imp, &server_uuid, 1);
494 CERROR("can't add initial connection\n");
495 GOTO(err_import, rc);
497 imp->imp_connection = NULL;
499 cli->cl_import = imp;
500 /* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
501 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
503 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
504 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
505 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
506 name, obddev->obd_name,
507 cli->cl_target_uuid.uuid);
508 spin_lock(&imp->imp_lock);
509 imp->imp_deactive = 1;
510 spin_unlock(&imp->imp_lock);
514 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
515 LDLM_NAMESPACE_CLIENT,
516 LDLM_NAMESPACE_GREEDY,
518 if (obddev->obd_namespace == NULL) {
519 CERROR("Unable to create client namespace - %s\n",
521 GOTO(err_import, rc = -ENOMEM);
527 class_destroy_import(imp);
531 if (cli->cl_mod_tag_bitmap != NULL)
532 OBD_FREE(cli->cl_mod_tag_bitmap,
533 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
534 cli->cl_mod_tag_bitmap = NULL;
538 EXPORT_SYMBOL(client_obd_setup);
540 int client_obd_cleanup(struct obd_device *obddev)
542 struct client_obd *cli = &obddev->u.cli;
545 ldlm_namespace_free_post(obddev->obd_namespace);
546 obddev->obd_namespace = NULL;
548 obd_cleanup_client_import(obddev);
549 LASSERT(obddev->u.cli.cl_import == NULL);
553 if (cli->cl_mod_tag_bitmap != NULL)
554 OBD_FREE(cli->cl_mod_tag_bitmap,
555 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
556 cli->cl_mod_tag_bitmap = NULL;
560 EXPORT_SYMBOL(client_obd_cleanup);
562 /* ->o_connect() method for client side (OSC and MDC and MGC) */
563 int client_connect_import(const struct lu_env *env,
564 struct obd_export **exp,
565 struct obd_device *obd, struct obd_uuid *cluuid,
566 struct obd_connect_data *data, void *localdata)
568 struct client_obd *cli = &obd->u.cli;
569 struct obd_import *imp = cli->cl_import;
570 struct obd_connect_data *ocd;
571 struct lustre_handle conn = { 0 };
576 down_write(&cli->cl_sem);
577 if (cli->cl_conn_count > 0)
578 GOTO(out_sem, rc = -EALREADY);
580 rc = class_connect(&conn, obd, cluuid);
584 cli->cl_conn_count++;
585 *exp = class_conn2export(&conn);
587 LASSERT(obd->obd_namespace);
589 imp->imp_dlm_handle = conn;
590 rc = ptlrpc_init_import(imp);
594 ocd = &imp->imp_connect_data;
597 imp->imp_connect_flags_orig = data->ocd_connect_flags;
598 imp->imp_connect_flags2_orig = data->ocd_connect_flags2;
601 rc = ptlrpc_connect_import(imp);
603 LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
606 LASSERT(*exp != NULL && (*exp)->exp_connection);
609 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
610 ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
611 data->ocd_connect_flags, ocd->ocd_connect_flags);
612 data->ocd_connect_flags = ocd->ocd_connect_flags;
613 data->ocd_connect_flags2 = ocd->ocd_connect_flags2;
616 ptlrpc_pinger_add_import(imp);
622 cli->cl_conn_count--;
623 class_disconnect(*exp);
627 up_write(&cli->cl_sem);
629 if (!rc && localdata) {
630 LASSERT(cli->cl_cache == NULL); /* only once */
631 cli->cl_cache = (struct cl_client_cache *)localdata;
632 cl_cache_incref(cli->cl_cache);
633 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
635 /* add this osc into entity list */
636 LASSERT(list_empty(&cli->cl_lru_osc));
637 spin_lock(&cli->cl_cache->ccc_lru_lock);
638 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
639 spin_unlock(&cli->cl_cache->ccc_lru_lock);
644 EXPORT_SYMBOL(client_connect_import);
646 int client_disconnect_export(struct obd_export *exp)
648 struct obd_device *obd = class_exp2obd(exp);
649 struct client_obd *cli;
650 struct obd_import *imp;
655 CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
656 exp, exp ? exp->exp_handle.h_cookie : -1);
661 imp = cli->cl_import;
663 down_write(&cli->cl_sem);
664 CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
667 if (cli->cl_conn_count == 0) {
668 CERROR("disconnecting disconnected device (%s)\n",
670 GOTO(out_disconnect, rc = -EINVAL);
673 cli->cl_conn_count--;
674 if (cli->cl_conn_count != 0)
675 GOTO(out_disconnect, rc = 0);
677 /* Mark import deactivated now, so we don't try to reconnect if any
678 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
679 * fully deactivate the import, or that would drop all requests. */
680 spin_lock(&imp->imp_lock);
681 imp->imp_deactive = 1;
682 spin_unlock(&imp->imp_lock);
684 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
685 * delete it regardless. (It's safe to delete an import that was
687 (void)ptlrpc_pinger_del_import(imp);
689 if (obd->obd_namespace != NULL) {
690 /* obd_force == local only */
691 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
692 obd->obd_force ? LCF_LOCAL : 0, NULL);
693 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
696 /* There's no need to hold sem while disconnecting an import,
697 * and it may actually cause deadlock in GSS. */
698 up_write(&cli->cl_sem);
699 rc = ptlrpc_disconnect_import(imp, 0);
700 down_write(&cli->cl_sem);
702 ptlrpc_invalidate_import(imp);
707 /* Use server style - class_disconnect should be always called for
709 err = class_disconnect(exp);
713 up_write(&cli->cl_sem);
717 EXPORT_SYMBOL(client_disconnect_export);
719 #ifdef HAVE_SERVER_SUPPORT
720 int server_disconnect_export(struct obd_export *exp)
725 /* Disconnect early so that clients can't keep using export. */
726 rc = class_disconnect(exp);
727 /* Close import to avoid sending any requests. */
728 if (exp->exp_imp_reverse)
729 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
731 ldlm_bl_thread_wakeup();
733 /* complete all outstanding replies */
734 spin_lock(&exp->exp_lock);
735 while (!list_empty(&exp->exp_outstanding_replies)) {
736 struct ptlrpc_reply_state *rs =
737 list_entry(exp->exp_outstanding_replies.next,
738 struct ptlrpc_reply_state, rs_exp_list);
739 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
741 spin_lock(&svcpt->scp_rep_lock);
743 list_del_init(&rs->rs_exp_list);
745 spin_lock(&rs->rs_lock);
746 /* clear rs_convert_lock to make sure rs is handled and put */
747 rs->rs_convert_lock = 0;
748 ptlrpc_schedule_difficult_reply(rs);
749 spin_unlock(&rs->rs_lock);
751 spin_unlock(&svcpt->scp_rep_lock);
753 spin_unlock(&exp->exp_lock);
757 EXPORT_SYMBOL(server_disconnect_export);
759 /* --------------------------------------------------------------------------
760 * from old lib/target.c
761 * -------------------------------------------------------------------------- */
763 static int target_handle_reconnect(struct lustre_handle *conn,
764 struct obd_export *exp,
765 struct obd_uuid *cluuid)
767 struct obd_device *target;
768 struct lustre_handle *hdl;
774 hdl = &exp->exp_imp_reverse->imp_remote_handle;
775 if (!exp->exp_connection || !lustre_handle_is_used(hdl)) {
776 conn->cookie = exp->exp_handle.h_cookie;
777 CDEBUG(D_HA, "connect export for UUID '%s' at %p,"
778 " cookie %#llx\n", cluuid->uuid, exp, conn->cookie);
782 target = exp->exp_obd;
784 /* Might be a re-connect after a partition. */
785 if (memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
786 LCONSOLE_WARN("%s: already connected client %s (at %s) "
787 "with handle %#llx. Rejecting client "
788 "with the same UUID trying to reconnect "
789 "with handle %#llx\n", target->obd_name,
790 obd_uuid2str(&exp->exp_client_uuid),
791 obd_export_nid2str(exp),
792 hdl->cookie, conn->cookie);
793 memset(conn, 0, sizeof *conn);
794 /* target_handle_connect() treats EALREADY and
795 * -EALREADY differently. -EALREADY is an error
796 * (same UUID, different handle). */
800 if (!target->obd_recovering) {
801 LCONSOLE_WARN("%s: Client %s (at %s) reconnecting\n",
802 target->obd_name, obd_uuid2str(&exp->exp_client_uuid),
803 obd_export_nid2str(exp));
804 GOTO(out_already, rc);
807 remaining = hrtimer_expires_remaining(&target->obd_recovery_timer);
808 timeout = ktime_divns(remaining, NSEC_PER_SEC);
810 LCONSOLE_WARN("%s: Client %s (at %s) reconnected, waiting for %d clients in recovery for %lld:%.02lld\n",
812 obd_uuid2str(&exp->exp_client_uuid),
813 obd_export_nid2str(exp),
814 target->obd_max_recoverable_clients,
815 timeout / 60, timeout % 60);
817 struct target_distribute_txn_data *tdtd;
822 tdtd = class_exp2tgt(exp)->lut_tdtd;
823 if (tdtd && tdtd->tdtd_show_update_logs_retrievers)
824 buf = tdtd->tdtd_show_update_logs_retrievers(
825 tdtd->tdtd_show_retrievers_cbdata,
829 LCONSOLE_WARN("%s: Client %s (at %s) reconnecting, waiting for %d MDTs (%s) in recovery for %lld:%.02lld. Please wait until all MDTs recovered or you may force MDT evicition via 'lctl --device %s abort_recovery.\n",
831 obd_uuid2str(&exp->exp_client_uuid),
832 obd_export_nid2str(exp), count,
833 buf ? buf : "unknown (not enough RAM)",
834 (abs(timeout) + target->obd_recovery_timeout) / 60,
835 (abs(timeout) + target->obd_recovery_timeout) % 60,
838 LCONSOLE_WARN("%s: Recovery already passed deadline %lld:%.02lld. If you do not want to wait more, you may force taget eviction via 'lctl --device %s abort_recovery.\n",
839 target->obd_name, abs(timeout) / 60,
840 abs(timeout) % 60, target->obd_name);
847 conn->cookie = exp->exp_handle.h_cookie;
848 /* target_handle_connect() treats EALREADY and
849 * -EALREADY differently. EALREADY means we are
850 * doing a valid reconnect from the same client. */
855 check_and_start_recovery_timer(struct obd_device *obd,
856 struct ptlrpc_request *req, int new_client);
859 * update flags for import during reconnect process
861 static int rev_import_flags_update(struct obd_import *revimp,
862 struct ptlrpc_request *req)
865 struct obd_connect_data *data;
867 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
869 if (data->ocd_connect_flags & OBD_CONNECT_AT)
870 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
872 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
874 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
876 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
878 CERROR("%s: cannot get reverse import %s security: rc = %d\n",
879 revimp->imp_client->cli_name,
880 libcfs_id2str(req->rq_peer), rc);
888 * Allocate a new reverse import for an export.
890 * \retval -errno in case error hit
891 * \retval 0 if reverse import correctly init
893 int rev_import_init(struct obd_export *export)
895 struct obd_device *obd = export->exp_obd;
896 struct obd_import *revimp;
898 LASSERT(export->exp_imp_reverse == NULL);
900 revimp = class_new_import(obd);
904 revimp->imp_remote_handle.cookie = 0ULL;
905 revimp->imp_client = &obd->obd_ldlm_client;
906 revimp->imp_dlm_fake = 1;
908 /* it is safe to connect import in new state as no sends possible */
909 spin_lock(&export->exp_lock);
910 export->exp_imp_reverse = revimp;
911 spin_unlock(&export->exp_lock);
912 class_import_put(revimp);
916 EXPORT_SYMBOL(rev_import_init);
919 * Handle reconnect for an export.
921 * \param exp export to handle reconnect process
922 * \param req client reconnect request
924 * \retval -rc in case securitfy flavor can't be changed
925 * \retval 0 in case none problems
927 static int rev_import_reconnect(struct obd_export *exp,
928 struct ptlrpc_request *req)
930 struct obd_import *revimp = exp->exp_imp_reverse;
931 struct lustre_handle *lh;
934 /* avoid sending a request until import flags are changed */
935 ptlrpc_import_enter_resend(revimp);
937 if (revimp->imp_connection != NULL)
938 ptlrpc_connection_put(revimp->imp_connection);
941 * client from recovery don't have a handle so we need to take from
942 * request. it may produce situation when wrong client connected
943 * to recovery as we trust a client uuid
945 lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
946 revimp->imp_remote_handle = *lh;
948 /* unknown versions will be caught in
949 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
950 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
952 revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
954 rc = rev_import_flags_update(revimp, req);
956 /* it is safe to still be in RECOVERY phase as we are not able
957 * to setup correct security flavor so requests are not able to
958 * be delivered correctly */
962 /* resend all rpc's via new connection */
963 return ptlrpc_import_recovery_state_machine(revimp);
966 int target_handle_connect(struct ptlrpc_request *req)
968 struct obd_device *target = NULL;
969 struct obd_export *export = NULL;
970 /* connect handle - filled from target_handle_reconnect in
972 struct lustre_handle conn;
973 struct lustre_handle *tmp;
974 struct obd_uuid cluuid;
979 bool mds_conn = false, lw_client = false, initial_conn = false;
980 bool mds_mds_conn = false;
981 bool new_mds_mds_conn = false;
982 struct obd_connect_data *data, *tmpdata;
984 lnet_nid_t *client_nid = NULL;
987 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
989 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
991 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
992 GOTO(out, rc = -EINVAL);
995 target = class_dev_by_str(str);
997 deuuidify(str, NULL, &target_start, &target_len);
998 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
999 "from %s (no target). If you are running "
1000 "an HA pair check that the target is "
1001 "mounted on the other server.\n", str,
1002 libcfs_nid2str(req->rq_peer.nid));
1003 GOTO(out, rc = -ENODEV);
1006 spin_lock(&target->obd_dev_lock);
1008 target->obd_conn_inprogress++;
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 spin_unlock(&target->obd_dev_lock);
1033 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
1035 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
1036 GOTO(out, rc = -EINVAL);
1039 obd_str2uuid(&cluuid, str);
1041 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1043 GOTO(out, rc = -EPROTO);
1047 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1049 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
1051 GOTO(out, rc = -EPROTO);
1053 rc = req_capsule_server_pack(&req->rq_pill);
1057 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
1058 /* Don't allow clients to connect that are using old 1.8 format
1059 * protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
1060 * ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
1061 * FULL20 flag should be set on all connections since 2.0, but no
1062 * longer affects behaviour.
1064 * Later this check will be disabled and the flag can be retired
1065 * completely once interop with 3.0 is no longer needed.
1067 if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
1068 GOTO(out, rc = -EPROTO);
1070 /* Don't allow liblustre clients to connect.
1071 * - testing was disabled in v2_2_50_0-61-g6a75d65
1072 * - building was disabled in v2_5_58_0-28-g7277179
1073 * - client code was deleted in v2_6_50_0-101-gcdfbc72,
1074 * - clients were refused connect for version difference > 0.0.1.32 */
1075 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1076 DEBUG_REQ(D_WARNING, req, "Refusing libclient connection");
1077 GOTO(out, rc = -EPROTO);
1081 /* Note: lw_client is needed in MDS-MDS failover during update log
1082 * processing, so we needs to allow lw_client to be connected at
1083 * anytime, instead of only the initial connection */
1084 lw_client = (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0;
1086 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
1087 initial_conn = true;
1088 mds_conn = (data->ocd_connect_flags & OBD_CONNECT_MDS) != 0;
1089 mds_mds_conn = (data->ocd_connect_flags &
1090 OBD_CONNECT_MDS_MDS) != 0;
1092 /* OBD_CONNECT_MNE_SWAB is defined as OBD_CONNECT_MDS_MDS
1093 * for Imperative Recovery connection from MGC to MGS.
1095 * Via check OBD_CONNECT_FID, we can distinguish whether
1096 * the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
1097 * MGC or MDT, since MGC does not use OBD_CONNECT_FID.
1100 (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1101 (data->ocd_connect_flags & OBD_CONNECT_FID) &&
1102 (data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
1103 __u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
1104 __u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
1105 __u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
1107 /* We do not support the MDT-MDT interoperations with
1108 * different version MDT because of protocol changes. */
1109 if (unlikely(major != LUSTRE_MAJOR ||
1110 minor != LUSTRE_MINOR ||
1111 abs(patch - LUSTRE_PATCH) > 3)) {
1112 LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the "
1113 "connection from different version MDT "
1114 "(%d.%d.%d.%d) %s %s\n",
1115 target->obd_name, LUSTRE_MAJOR,
1116 LUSTRE_MINOR, LUSTRE_PATCH, LUSTRE_FIX,
1117 major, minor, patch,
1118 OBD_OCD_VERSION_FIX(data->ocd_version),
1119 libcfs_nid2str(req->rq_peer.nid), str);
1121 GOTO(out, rc = -EPROTO);
1126 /* lctl gets a backstage, all-access pass. */
1127 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
1128 goto dont_check_exports;
1130 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
1134 /* We've found an export in the hash. */
1136 spin_lock(&export->exp_lock);
1138 if (export->exp_connecting) { /* bug 9635, et. al. */
1139 spin_unlock(&export->exp_lock);
1140 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
1141 export->exp_obd->obd_name, export,
1142 libcfs_nid2str(req->rq_peer.nid));
1143 class_export_put(export);
1146 } else if ((mds_conn || (lw_client && initial_conn) ||
1147 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1148 export->exp_connection != NULL) {
1149 spin_unlock(&export->exp_lock);
1150 if (req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1151 /* MDS or LWP reconnected after failover. */
1152 LCONSOLE_WARN("%s: Received %s connection from "
1153 "%s, removing former export from %s\n",
1154 target->obd_name, mds_conn ? "MDS" : "LWP",
1155 libcfs_nid2str(req->rq_peer.nid),
1156 libcfs_nid2str(export->exp_connection->c_peer.nid));
1158 /* New MDS connection from the same NID. */
1159 LCONSOLE_WARN("%s: Received new %s connection from "
1160 "%s, removing former export from same NID\n",
1161 target->obd_name, mds_conn ? "MDS" : "LWP",
1162 libcfs_nid2str(req->rq_peer.nid));
1165 if (req->rq_peer.nid == export->exp_connection->c_peer.nid &&
1166 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) {
1167 /* Because exports between MDTs will always be
1168 * kept, let's do not fail such export if they
1169 * come from the same NID, otherwise it might
1170 * cause eviction between MDTs, which might
1171 * cause namespace inconsistency */
1172 spin_lock(&export->exp_lock);
1173 export->exp_connecting = 1;
1174 export->exp_conn_cnt = 0;
1175 spin_unlock(&export->exp_lock);
1176 conn.cookie = export->exp_handle.h_cookie;
1179 class_fail_export(export);
1180 class_export_put(export);
1184 } else if (export->exp_connection != NULL && initial_conn &&
1185 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1186 spin_unlock(&export->exp_lock);
1187 /* In MDS failover we have static UUID but NID can change. */
1188 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
1189 "existing nid %s is already connected\n",
1190 target->obd_name, cluuid.uuid,
1191 libcfs_nid2str(req->rq_peer.nid),
1193 export->exp_connection->c_peer.nid));
1195 class_export_put(export);
1198 export->exp_connecting = 1;
1199 spin_unlock(&export->exp_lock);
1200 LASSERT(export->exp_obd == target);
1202 rc = target_handle_reconnect(&conn, export, &cluuid);
1205 /* If we found an export, we already unlocked. */
1208 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
1209 } else if (req->rq_export == NULL &&
1210 atomic_read(&export->exp_rpc_count) > 0) {
1211 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
1212 "still busy with %d references\n",
1213 target->obd_name, cluuid.uuid,
1214 libcfs_nid2str(req->rq_peer.nid),
1215 atomic_read(&export->exp_refcount));
1216 GOTO(out, rc = -EBUSY);
1217 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1 &&
1219 if (!strstr(cluuid.uuid, "mdt"))
1220 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1221 "known client %s (at %s) because it "
1222 "is indicating it is a new client",
1223 target->obd_name, cluuid.uuid,
1224 libcfs_nid2str(req->rq_peer.nid));
1225 GOTO(out, rc = -EALREADY);
1227 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1234 CDEBUG(D_HA, "%s: connection from %s@%s %st%llu exp %p cur %lld last %lld\n",
1235 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1236 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1237 export, ktime_get_real_seconds(),
1238 export ? export->exp_last_request_time : 0);
1240 /* If this is the first time a client connects, reset the recovery
1241 * timer. Discard lightweight connections which might be local. */
1242 if (!lw_client && rc == 0 && target->obd_recovering)
1243 check_and_start_recovery_timer(target, req, export == NULL);
1245 /* We want to handle EALREADY but *not* -EALREADY from
1246 * target_handle_reconnect(), return reconnection state in a flag. */
1247 if (rc == EALREADY) {
1248 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1254 /* Tell the client if we support replayable requests. */
1255 if (target->obd_replayable)
1256 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1257 client_nid = &req->rq_peer.nid;
1259 if (export == NULL) {
1260 /* allow lightweight connections during recovery */
1261 /* allow "new" MDT to be connected during recovery, since we
1262 * need retrieve recovery update records from it */
1263 if (target->obd_recovering && !lw_client && !mds_mds_conn) {
1264 struct hrtimer *timer = &target->obd_recovery_timer;
1273 connected = atomic_read(&target->obd_connected_clients);
1274 in_progress = atomic_read(&target->obd_lock_replay_clients);
1275 known = target->obd_max_recoverable_clients;
1276 stale = target->obd_stale_clients;
1277 remaining = hrtimer_expires_remaining(timer);
1278 left = ktime_divns(remaining, NSEC_PER_SEC);
1279 if (ktime_to_ns(remaining) > 0) {
1280 msg = "to recover in";
1283 msg = "already passed deadline";
1287 LCONSOLE_WARN("%s: Denying connection for new client %s (at %s), waiting for %d known clients (%d recovered, %d in progress, and %d evicted) %s %lld:%.02lld\n",
1288 target->obd_name, cluuid.uuid,
1289 libcfs_nid2str(req->rq_peer.nid), known,
1290 connected - in_progress, in_progress,
1291 stale, msg, timeout / 60, timeout % 60);
1295 rc = obd_connect(req->rq_svc_thread->t_env,
1296 &export, target, &cluuid, data,
1298 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1299 lustre_msg_add_op_flags(req->rq_repmsg,
1300 MSG_CONNECT_RECOVERING);
1302 conn.cookie = export->exp_handle.h_cookie;
1303 rc = rev_import_init(export);
1307 new_mds_mds_conn = true;
1310 rc = obd_reconnect(req->rq_svc_thread->t_env,
1311 export, target, &cluuid, data, client_nid);
1316 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1317 data->ocd_instance = target->u.obt.obt_instance;
1319 /* Return only the parts of obd_connect_data that we understand, so the
1320 * client knows that we don't understand the rest. */
1322 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1324 tmpdata = req_capsule_server_get(&req->rq_pill,
1326 /* Don't use struct assignment here, because the client reply
1327 * buffer may be smaller/larger than the local struct
1328 * obd_connect_data. */
1329 memcpy(tmpdata, data, min(tmpsize, size));
1332 /* If the client and the server are the same node, we will already
1333 * have an export that really points to the client's DLM export,
1334 * because we have a shared handles table.
1336 * XXX this will go away when shaver stops sending the "connect" handle
1337 * in the real "remote handle" field of the request --phik 24 Apr 2003
1339 ptlrpc_request_change_export(req, export);
1341 spin_lock(&export->exp_lock);
1342 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1343 spin_unlock(&export->exp_lock);
1344 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1345 "or equal conn_cnt: %d >= %d\n",
1346 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1347 export->exp_conn_cnt,
1348 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1350 GOTO(out, rc = -EALREADY);
1352 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1353 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1354 spin_unlock(&export->exp_lock);
1356 if (export->exp_connection != NULL) {
1357 /* Check to see if connection came from another NID. */
1358 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1359 !hlist_unhashed(&export->exp_nid_hash))
1360 cfs_hash_del(export->exp_obd->obd_nid_hash,
1361 &export->exp_connection->c_peer.nid,
1362 &export->exp_nid_hash);
1364 ptlrpc_connection_put(export->exp_connection);
1367 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1370 if (hlist_unhashed(&export->exp_nid_hash))
1371 cfs_hash_add(export->exp_obd->obd_nid_hash,
1372 &export->exp_connection->c_peer.nid,
1373 &export->exp_nid_hash);
1375 lustre_msg_set_handle(req->rq_repmsg, &conn);
1377 rc = rev_import_reconnect(export, req);
1381 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1383 __u64 transno = data->ocd_transno;
1385 spin_lock(&export->exp_lock);
1386 /* possible race with class_disconnect_stale_exports,
1387 * export may be already in the eviction process */
1388 if (export->exp_failed) {
1389 spin_unlock(&export->exp_lock);
1390 GOTO(out, rc = -ENODEV);
1392 export->exp_in_recovery = 1;
1393 export->exp_req_replay_needed = 1;
1394 export->exp_lock_replay_needed = 1;
1395 spin_unlock(&export->exp_lock);
1397 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1398 MSG_CONNECT_TRANSNO);
1399 if (has_transno && transno == 0)
1400 CWARN("Connect with zero transno!\n");
1402 if (has_transno && transno > 0 &&
1403 transno < target->obd_next_recovery_transno &&
1404 transno > target->obd_last_committed) {
1405 /* Another way is to use cmpxchg() to be lock-free. */
1406 spin_lock(&target->obd_recovery_task_lock);
1407 if (transno < target->obd_next_recovery_transno)
1408 target->obd_next_recovery_transno = transno;
1409 spin_unlock(&target->obd_recovery_task_lock);
1412 atomic_inc(&target->obd_req_replay_clients);
1413 atomic_inc(&target->obd_lock_replay_clients);
1414 /* Note: MDS-MDS connection is allowed to be connected during
1415 * recovery, no matter if the exports needs to be recoveried.
1416 * Because we need retrieve updates logs from all other MDTs.
1417 * So if the MDS-MDS export is new, obd_max_recoverable_clients
1418 * also needs to be increased to match other recovery checking
1420 if (new_mds_mds_conn)
1421 target->obd_max_recoverable_clients++;
1422 if (atomic_inc_return(&target->obd_connected_clients) ==
1423 target->obd_max_recoverable_clients)
1424 wake_up(&target->obd_next_transno_waitq);
1427 /* Tell the client we're in recovery, when client is involved in it. */
1428 if (target->obd_recovering && !lw_client)
1429 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1433 spin_lock(&export->exp_lock);
1434 export->exp_connecting = 0;
1435 spin_unlock(&export->exp_lock);
1437 class_export_put(export);
1439 if (target != NULL) {
1440 spin_lock(&target->obd_dev_lock);
1441 target->obd_conn_inprogress--;
1442 spin_unlock(&target->obd_dev_lock);
1443 class_decref(target, "find", current);
1445 req->rq_status = rc;
1449 int target_handle_disconnect(struct ptlrpc_request *req)
1454 rc = req_capsule_server_pack(&req->rq_pill);
1458 /* Keep the rq_export around so we can send the reply. */
1459 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1464 void target_destroy_export(struct obd_export *exp)
1466 struct obd_import *imp = NULL;
1467 /* exports created from last_rcvd data, and "fake"
1468 exports created by lctl don't have an import */
1469 spin_lock(&exp->exp_lock);
1470 if (exp->exp_imp_reverse != NULL) {
1471 imp = exp->exp_imp_reverse;
1472 exp->exp_imp_reverse = NULL;
1474 spin_unlock(&exp->exp_lock);
1476 client_destroy_import(imp);
1478 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1479 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1480 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1481 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1483 EXPORT_SYMBOL(target_destroy_export);
1486 * Recovery functions
1488 static void target_request_copy_get(struct ptlrpc_request *req)
1490 class_export_rpc_inc(req->rq_export);
1491 LASSERT(list_empty(&req->rq_list));
1492 INIT_LIST_HEAD(&req->rq_replay_list);
1494 /* Increase refcount to keep request in queue. */
1495 atomic_inc(&req->rq_refcount);
1496 /* Let export know it has replays to be handled. */
1497 atomic_inc(&req->rq_export->exp_replay_count);
1500 static void target_request_copy_put(struct ptlrpc_request *req)
1502 LASSERT(list_empty(&req->rq_replay_list));
1503 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1505 atomic_dec(&req->rq_export->exp_replay_count);
1506 class_export_rpc_dec(req->rq_export);
1507 ptlrpc_server_drop_request(req);
1510 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1512 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1513 struct obd_export *exp = req->rq_export;
1514 struct ptlrpc_request *reqiter;
1515 struct ptlrpc_request *dup_req = NULL;
1520 spin_lock(&exp->exp_lock);
1521 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1523 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1531 /* We expect it with RESENT and REPLAY flags. */
1532 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1533 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1534 CERROR("invalid flags %x of resent replay\n",
1535 lustre_msg_get_flags(req->rq_reqmsg));
1537 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1540 new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1542 lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
1543 lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
1547 list_add_tail(&req->rq_replay_list,
1548 &exp->exp_req_replay_queue);
1551 spin_unlock(&exp->exp_lock);
1555 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1557 LASSERT(!list_empty(&req->rq_replay_list));
1558 LASSERT(req->rq_export);
1560 spin_lock(&req->rq_export->exp_lock);
1561 list_del_init(&req->rq_replay_list);
1562 spin_unlock(&req->rq_export->exp_lock);
1565 static void target_finish_recovery(struct lu_target *lut)
1567 struct obd_device *obd = lut->lut_obd;
1570 /* Only log a recovery message when recovery has occurred. */
1571 if (obd->obd_recovery_start) {
1572 time64_t now = ktime_get_real_seconds();
1573 time64_t elapsed_time;
1575 elapsed_time = max_t(time64_t, now - obd->obd_recovery_start, 1);
1576 LCONSOLE_INFO("%s: Recovery over after %lld:%.02lld, of %d clients "
1577 "%d recovered and %d %s evicted.\n", obd->obd_name,
1578 (s64)elapsed_time / 60, (s64)elapsed_time % 60,
1579 obd->obd_max_recoverable_clients,
1580 atomic_read(&obd->obd_connected_clients),
1581 obd->obd_stale_clients,
1582 obd->obd_stale_clients == 1 ? "was" : "were");
1585 ldlm_reprocess_recovery_done(obd->obd_namespace);
1586 spin_lock(&obd->obd_recovery_task_lock);
1587 if (!list_empty(&obd->obd_req_replay_queue) ||
1588 !list_empty(&obd->obd_lock_replay_queue) ||
1589 !list_empty(&obd->obd_final_req_queue)) {
1590 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1592 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1593 list_empty(&obd->obd_lock_replay_queue) ? \
1595 list_empty(&obd->obd_final_req_queue) ? \
1597 spin_unlock(&obd->obd_recovery_task_lock);
1600 spin_unlock(&obd->obd_recovery_task_lock);
1602 obd->obd_recovery_end = ktime_get_real_seconds();
1604 /* When recovery finished, cleanup orphans on MDS and OST. */
1605 if (obd->obd_type && OBP(obd, postrecov)) {
1606 int rc = OBP(obd, postrecov)(obd);
1609 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1615 static void abort_req_replay_queue(struct obd_device *obd)
1617 struct ptlrpc_request *req, *n;
1618 struct list_head abort_list;
1620 INIT_LIST_HEAD(&abort_list);
1621 spin_lock(&obd->obd_recovery_task_lock);
1622 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1623 spin_unlock(&obd->obd_recovery_task_lock);
1624 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1625 DEBUG_REQ(D_WARNING, req, "aborted:");
1626 req->rq_status = -ENOTCONN;
1627 if (ptlrpc_error(req)) {
1628 DEBUG_REQ(D_ERROR, req,
1629 "failed abort_req_reply; skipping");
1631 target_exp_dequeue_req_replay(req);
1632 target_request_copy_put(req);
1636 static void abort_lock_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_lock_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_ERROR, req, "aborted:");
1647 req->rq_status = -ENOTCONN;
1648 if (ptlrpc_error(req)) {
1649 DEBUG_REQ(D_ERROR, req,
1650 "failed abort_lock_reply; skipping");
1652 target_request_copy_put(req);
1656 /* Called from a cleanup function if the device is being cleaned up
1657 forcefully. The exports should all have been disconnected already,
1658 the only thing left to do is
1659 - clear the recovery flags
1661 - free queued requests and replies, but don't send replies
1662 Because the obd_stopping flag is set, no new requests should be received.
1665 void target_cleanup_recovery(struct obd_device *obd)
1667 struct ptlrpc_request *req, *n;
1668 struct list_head clean_list;
1670 INIT_LIST_HEAD(&clean_list);
1671 spin_lock(&obd->obd_dev_lock);
1672 if (!obd->obd_recovering) {
1673 spin_unlock(&obd->obd_dev_lock);
1677 obd->obd_recovering = obd->obd_abort_recovery = 0;
1678 spin_unlock(&obd->obd_dev_lock);
1680 spin_lock(&obd->obd_recovery_task_lock);
1681 target_cancel_recovery_timer(obd);
1682 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1683 spin_unlock(&obd->obd_recovery_task_lock);
1685 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1686 LASSERT(req->rq_reply_state == NULL);
1687 target_exp_dequeue_req_replay(req);
1688 target_request_copy_put(req);
1691 spin_lock(&obd->obd_recovery_task_lock);
1692 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1693 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1694 spin_unlock(&obd->obd_recovery_task_lock);
1696 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1697 LASSERT(req->rq_reply_state == NULL);
1698 target_request_copy_put(req);
1703 EXPORT_SYMBOL(target_cleanup_recovery);
1705 /* obd_recovery_task_lock should be held */
1706 void target_cancel_recovery_timer(struct obd_device *obd)
1708 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1709 hrtimer_cancel(&obd->obd_recovery_timer);
1712 static void target_start_recovery_timer(struct obd_device *obd)
1716 if (obd->obd_recovery_start != 0)
1719 spin_lock(&obd->obd_dev_lock);
1720 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1721 spin_unlock(&obd->obd_dev_lock);
1725 LASSERT(obd->obd_recovery_timeout != 0);
1727 if (obd->obd_recovery_start != 0) {
1728 spin_unlock(&obd->obd_dev_lock);
1732 delay = ktime_set(obd->obd_recovery_timeout, 0);
1733 hrtimer_start(&obd->obd_recovery_timer, delay, HRTIMER_MODE_REL);
1734 obd->obd_recovery_start = ktime_get_real_seconds();
1735 spin_unlock(&obd->obd_dev_lock);
1737 LCONSOLE_WARN("%s: Will be in recovery for at least %llu:%02llu, or until %d client%s reconnect%s\n",
1739 obd->obd_recovery_timeout / 60,
1740 obd->obd_recovery_timeout % 60,
1741 obd->obd_max_recoverable_clients,
1742 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1743 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1747 * extend recovery window.
1749 * if @extend is true, extend recovery window to have @drt remaining at least;
1750 * otherwise, make sure the recovery timeout value is not less than @drt.
1752 static void extend_recovery_timer(struct obd_device *obd, time_t drt,
1759 spin_lock(&obd->obd_dev_lock);
1760 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1761 spin_unlock(&obd->obd_dev_lock);
1764 LASSERT(obd->obd_recovery_start != 0);
1766 to = obd->obd_recovery_timeout;
1767 left_ns = hrtimer_expires_remaining(&obd->obd_recovery_timer);
1768 left = ktime_divns(left_ns, NSEC_PER_SEC);
1769 if (extend && (drt > left))
1771 else if (!extend && (drt > to))
1774 if (to > obd->obd_recovery_time_hard) {
1775 to = obd->obd_recovery_time_hard;
1776 CWARN("%s: extended recovery timer reaching hard limit: %ld, extend: %d\n",
1777 obd->obd_name, to, extend);
1780 if (obd->obd_recovery_timeout < to) {
1781 ktime_t now = ktime_get_real();
1784 obd->obd_recovery_timeout = to;
1785 end = ktime_set(obd->obd_recovery_start + to, 0);
1786 left_ns = ktime_sub(end, now);
1787 hrtimer_forward_now(&obd->obd_recovery_timer, left_ns);
1788 left = ktime_divns(left_ns, NSEC_PER_MSEC);
1790 spin_unlock(&obd->obd_dev_lock);
1792 CDEBUG(D_HA, "%s: recovery timer will expire in %ld seconds\n",
1793 obd->obd_name, left);
1796 /* Reset the timer with each new client connection */
1798 * This timer is actually reconnect_timer, which is for making sure
1799 * the total recovery window is at least as big as my reconnect
1800 * attempt timing. So the initial recovery time_out will be set to
1801 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1802 * from client is bigger than this, then the recovery time_out will
1803 * be extended to make sure the client could be reconnected, in the
1804 * process, the timeout from the new client should be ignored.
1807 check_and_start_recovery_timer(struct obd_device *obd,
1808 struct ptlrpc_request *req,
1811 time_t service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1812 struct obd_device_target *obt = &obd->u.obt;
1814 if (!new_client && service_time)
1815 /* Teach server about old server's estimates, as first guess
1816 * at how long new requests will take.
1818 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1821 target_start_recovery_timer(obd);
1823 /* Convert the service time to RPC timeout,
1824 * and reuse service_time to limit stack usage.
1826 service_time = at_est2timeout(service_time);
1828 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_SLUGGISH_NET) &&
1829 service_time < at_extra)
1830 service_time = at_extra;
1832 /* We expect other clients to timeout within service_time, then try
1833 * to reconnect, then try the failover server. The max delay between
1834 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1835 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1837 LASSERT(obt->obt_magic == OBT_MAGIC);
1838 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1839 if (service_time > obd->obd_recovery_timeout && !new_client)
1840 extend_recovery_timer(obd, service_time, false);
1843 /** Health checking routines */
1844 static inline int exp_connect_healthy(struct obd_export *exp)
1846 return (exp->exp_in_recovery);
1849 /** if export done req_replay or has replay in queue */
1850 static inline int exp_req_replay_healthy(struct obd_export *exp)
1852 return (!exp->exp_req_replay_needed ||
1853 atomic_read(&exp->exp_replay_count) > 0);
1857 static inline int exp_req_replay_healthy_or_from_mdt(struct obd_export *exp)
1859 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1860 exp_req_replay_healthy(exp);
1863 /** if export done lock_replay or has replay in queue */
1864 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1866 return (!exp->exp_lock_replay_needed ||
1867 atomic_read(&exp->exp_replay_count) > 0);
1870 static inline int exp_vbr_healthy(struct obd_export *exp)
1872 return (!exp->exp_vbr_failed);
1875 static inline int exp_finished(struct obd_export *exp)
1877 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1880 static inline int exp_finished_or_from_mdt(struct obd_export *exp)
1882 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1886 static int check_for_next_transno(struct lu_target *lut)
1888 struct ptlrpc_request *req = NULL;
1889 struct obd_device *obd = lut->lut_obd;
1890 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
1891 int wake_up = 0, connected, completed, queue_len;
1892 __u64 req_transno = 0;
1893 __u64 update_transno = 0;
1894 __u64 next_transno = 0;
1897 spin_lock(&obd->obd_recovery_task_lock);
1898 if (!list_empty(&obd->obd_req_replay_queue)) {
1899 req = list_entry(obd->obd_req_replay_queue.next,
1900 struct ptlrpc_request, rq_list);
1901 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1905 update_transno = distribute_txn_get_next_transno(tdtd);
1907 connected = atomic_read(&obd->obd_connected_clients);
1908 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1909 queue_len = obd->obd_requests_queued_for_recovery;
1910 next_transno = obd->obd_next_recovery_transno;
1912 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1913 "req_transno: %llu, next_transno: %llu\n",
1914 obd->obd_max_recoverable_clients, connected, completed,
1915 queue_len, req_transno, next_transno);
1917 if (obd->obd_abort_recovery) {
1918 CDEBUG(D_HA, "waking for aborted recovery\n");
1920 } else if (obd->obd_recovery_expired) {
1921 CDEBUG(D_HA, "waking for expired recovery\n");
1923 } else if (tdtd != NULL && req != NULL &&
1924 is_req_replayed_by_update(req)) {
1925 LASSERTF(req_transno < next_transno, "req_transno %llu"
1926 "next_transno%llu\n", req_transno, next_transno);
1927 CDEBUG(D_HA, "waking for duplicate req (%llu)\n",
1930 } else if (req_transno == next_transno ||
1931 (update_transno != 0 && update_transno <= next_transno)) {
1932 CDEBUG(D_HA, "waking for next (%lld)\n", next_transno);
1934 } else if (queue_len > 0 &&
1935 queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1936 /** handle gaps occured due to lost reply or VBR */
1937 LASSERTF(req_transno >= next_transno,
1938 "req_transno: %llu, next_transno: %llu\n",
1939 req_transno, next_transno);
1941 "%s: waking for gap in transno, VBR is %s (skip: "
1942 "%lld, ql: %d, comp: %d, conn: %d, next: %lld"
1943 ", next_update %lld last_committed: %lld)\n",
1944 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1945 next_transno, queue_len, completed, connected,
1946 req_transno, update_transno, obd->obd_last_committed);
1947 obd->obd_next_recovery_transno = req_transno;
1949 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1950 CDEBUG(D_HA, "waking for completed recovery\n");
1952 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1953 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1954 " by fail_lock, waking up (%lld)\n", next_transno);
1955 obd->obd_next_recovery_transno = req_transno;
1958 spin_unlock(&obd->obd_recovery_task_lock);
1962 static int check_for_next_lock(struct lu_target *lut)
1964 struct obd_device *obd = lut->lut_obd;
1967 spin_lock(&obd->obd_recovery_task_lock);
1968 if (!list_empty(&obd->obd_lock_replay_queue)) {
1969 CDEBUG(D_HA, "waking for next lock\n");
1971 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1972 CDEBUG(D_HA, "waking for completed lock replay\n");
1974 } else if (obd->obd_abort_recovery) {
1975 CDEBUG(D_HA, "waking for aborted recovery\n");
1977 } else if (obd->obd_recovery_expired) {
1978 CDEBUG(D_HA, "waking for expired recovery\n");
1981 spin_unlock(&obd->obd_recovery_task_lock);
1987 * wait for recovery events,
1988 * check its status with help of check_routine
1989 * evict dead clients via health_check
1991 static int target_recovery_overseer(struct lu_target *lut,
1992 int (*check_routine)(struct lu_target *),
1993 int (*health_check)(struct obd_export *))
1995 struct obd_device *obd = lut->lut_obd;
1996 struct target_distribute_txn_data *tdtd;
2000 if (obd->obd_recovering && obd->obd_recovery_start == 0) {
2001 now = ktime_get_seconds();
2002 if (now - last > 600) {
2003 LCONSOLE_INFO("%s: in recovery but waiting for "
2004 "the first client to connect\n",
2009 if (obd->obd_recovery_start != 0 && ktime_get_real_seconds() >=
2010 (obd->obd_recovery_start + obd->obd_recovery_time_hard)) {
2011 __u64 next_update_transno = 0;
2013 /* Only abort the recovery if there are no update recovery
2014 * left in the queue */
2015 spin_lock(&obd->obd_recovery_task_lock);
2016 if (lut->lut_tdtd != NULL) {
2017 next_update_transno =
2018 distribute_txn_get_next_transno(lut->lut_tdtd);
2020 tdtd = lut->lut_tdtd;
2021 /* If next_update_transno == 0, it probably because
2022 * updatelog retrieve threads did not get any records
2023 * yet, let's wait those threads stopped */
2024 if (next_update_transno == 0) {
2025 struct l_wait_info lwi = { 0 };
2027 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2029 &tdtd->tdtd_recovery_threads_count) == 0,
2032 next_update_transno =
2033 distribute_txn_get_next_transno(
2038 if (next_update_transno != 0 && !obd->obd_abort_recovery) {
2039 obd->obd_next_recovery_transno = next_update_transno;
2040 spin_unlock(&obd->obd_recovery_task_lock);
2041 /* Disconnect unfinished exports from clients, and
2042 * keep connection from MDT to make sure the update
2043 * recovery will still keep trying until some one
2044 * manually abort the recovery */
2045 class_disconnect_stale_exports(obd,
2046 exp_finished_or_from_mdt);
2047 /* Abort all of replay and replay lock req from
2049 abort_req_replay_queue(obd);
2050 abort_lock_replay_queue(obd);
2051 CDEBUG(D_HA, "%s: there are still update replay (%#llx"
2052 ")in the queue.\n", obd->obd_name,
2053 next_update_transno);
2055 obd->obd_abort_recovery = 1;
2056 spin_unlock(&obd->obd_recovery_task_lock);
2057 CWARN("%s recovery is aborted by hard timeout\n",
2062 while (wait_event_timeout(obd->obd_next_transno_waitq,
2064 msecs_to_jiffies(60 * MSEC_PER_SEC)) == 0)
2065 /* wait indefinitely for event, but don't trigger watchdog */;
2067 if (obd->obd_abort_recovery) {
2068 CWARN("recovery is aborted, evict exports in recovery\n");
2069 if (lut->lut_tdtd != NULL) {
2070 struct l_wait_info lwi = { 0 };
2072 tdtd = lut->lut_tdtd;
2073 /* Let's wait all of the update log recovery thread
2075 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2076 atomic_read(&tdtd->tdtd_recovery_threads_count) == 0,
2078 /* Then abort the update recovery list */
2079 dtrq_list_destroy(lut->lut_tdtd);
2082 /** evict exports which didn't finish recovery yet */
2083 class_disconnect_stale_exports(obd, exp_finished);
2085 } else if (obd->obd_recovery_expired) {
2086 obd->obd_recovery_expired = 0;
2087 /** If some clients died being recovered, evict them */
2088 LCONSOLE_WARN("%s: recovery is timed out, "
2089 "evict stale exports\n", obd->obd_name);
2090 /** evict cexports with no replay in queue, they are stalled */
2091 class_disconnect_stale_exports(obd, health_check);
2093 /** continue with VBR */
2094 spin_lock(&obd->obd_dev_lock);
2095 obd->obd_version_recov = 1;
2096 spin_unlock(&obd->obd_dev_lock);
2098 * reset timer, recovery will proceed with versions now,
2099 * timeout is set just to handle reconnection delays
2101 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
2102 /** Wait for recovery events again, after evicting bad clients */
2108 static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
2110 struct obd_device *obd = lut->lut_obd;
2111 struct ptlrpc_request *req = NULL;
2113 CDEBUG(D_HA, "Waiting for lock\n");
2114 if (target_recovery_overseer(lut, check_for_next_lock,
2115 exp_lock_replay_healthy))
2116 abort_lock_replay_queue(obd);
2118 spin_lock(&obd->obd_recovery_task_lock);
2119 if (!list_empty(&obd->obd_lock_replay_queue)) {
2120 req = list_entry(obd->obd_lock_replay_queue.next,
2121 struct ptlrpc_request, rq_list);
2122 list_del_init(&req->rq_list);
2123 spin_unlock(&obd->obd_recovery_task_lock);
2125 spin_unlock(&obd->obd_recovery_task_lock);
2126 LASSERT(list_empty(&obd->obd_lock_replay_queue));
2127 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
2128 /** evict exports failed VBR */
2129 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2134 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
2136 struct ptlrpc_request *req = NULL;
2138 spin_lock(&obd->obd_recovery_task_lock);
2139 if (!list_empty(&obd->obd_final_req_queue)) {
2140 req = list_entry(obd->obd_final_req_queue.next,
2141 struct ptlrpc_request, rq_list);
2142 list_del_init(&req->rq_list);
2143 spin_unlock(&obd->obd_recovery_task_lock);
2144 if (req->rq_export->exp_in_recovery) {
2145 spin_lock(&req->rq_export->exp_lock);
2146 req->rq_export->exp_in_recovery = 0;
2147 spin_unlock(&req->rq_export->exp_lock);
2150 spin_unlock(&obd->obd_recovery_task_lock);
2155 static void handle_recovery_req(struct ptlrpc_thread *thread,
2156 struct ptlrpc_request *req,
2157 svc_handler_t handler)
2162 * export can be evicted during recovery, no need to handle replays for
2163 * it after that, discard such request silently
2165 if (req->rq_export->exp_disconnected)
2168 req->rq_session.lc_thread = thread;
2169 req->rq_svc_thread = thread;
2170 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
2172 /* thread context */
2173 lu_context_enter(&thread->t_env->le_ctx);
2175 lu_context_exit(&thread->t_env->le_ctx);
2177 /* don't reset timer for final stage */
2178 if (!exp_finished(req->rq_export)) {
2179 time_t to = obd_timeout;
2182 * Add request timeout to the recovery time so next request from
2183 * this client may come in recovery time
2186 struct ptlrpc_service_part *svcpt;
2188 svcpt = req->rq_rqbd->rqbd_svcpt;
2189 /* If the server sent early reply for this request,
2190 * the client will recalculate the timeout according to
2191 * current server estimate service time, so we will
2192 * use the maxium timeout here for waiting the client
2193 * sending the next req
2195 to = max_t(time_t, at_est2timeout(at_get(&svcpt->scp_at_estimate)),
2196 lustre_msg_get_timeout(req->rq_reqmsg));
2197 /* Add 2 net_latency, one for balance rq_deadline
2198 * (see ptl_send_rpc), one for resend the req to server,
2199 * Note: client will pack net_latency in replay req
2200 * (see ptlrpc_replay_req) */
2201 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
2203 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
2208 /** Checking routines for recovery */
2209 static int check_for_recovery_ready(struct lu_target *lut)
2211 struct obd_device *obd = lut->lut_obd;
2212 unsigned int clnts = atomic_read(&obd->obd_connected_clients);
2214 CDEBUG(D_HA, "connected %d stale %d max_recoverable_clients %d"
2215 " abort %d expired %d\n", clnts, obd->obd_stale_clients,
2216 obd->obd_max_recoverable_clients, obd->obd_abort_recovery,
2217 obd->obd_recovery_expired);
2219 if (!obd->obd_abort_recovery && !obd->obd_recovery_expired) {
2220 LASSERT(clnts <= obd->obd_max_recoverable_clients);
2221 if (clnts + obd->obd_stale_clients <
2222 obd->obd_max_recoverable_clients)
2226 if (lut->lut_tdtd != NULL) {
2227 if (!lut->lut_tdtd->tdtd_replay_ready &&
2228 !obd->obd_abort_recovery) {
2229 /* Let's extend recovery timer, in case the recovery
2230 * timer expired, and some clients got evicted */
2231 extend_recovery_timer(obd, obd->obd_recovery_timeout,
2233 CDEBUG(D_HA, "%s update recovery is not ready, extend recovery %llu\n",
2234 obd->obd_name, 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 x%llu t%lld from %s",
2394 lustre_msg_get_transno(req->rq_reqmsg),
2395 libcfs_nid2str(req->rq_peer.nid));
2397 handle_recovery_req(thread, req,
2398 trd->trd_recovery_handler);
2400 * bz18031: increase next_recovery_transno before
2401 * target_request_copy_put() will drop exp_rpc reference
2403 spin_lock(&obd->obd_recovery_task_lock);
2404 obd->obd_next_recovery_transno++;
2405 spin_unlock(&obd->obd_recovery_task_lock);
2406 target_exp_dequeue_req_replay(req);
2407 target_request_copy_put(req);
2408 obd->obd_replayed_requests++;
2409 } else if (type == UPDATE_RECOVERY && transno != 0) {
2410 struct distribute_txn_replay_req *dtrq;
2413 spin_unlock(&obd->obd_recovery_task_lock);
2415 LASSERT(tdtd != NULL);
2416 dtrq = distribute_txn_get_next_req(tdtd);
2417 lu_context_enter(&thread->t_env->le_ctx);
2418 rc = tdtd->tdtd_replay_handler(env, tdtd, dtrq);
2419 lu_context_exit(&thread->t_env->le_ctx);
2420 extend_recovery_timer(obd, obd_timeout, true);
2422 if (rc == 0 && dtrq->dtrq_xid != 0) {
2423 CDEBUG(D_HA, "Move x%llu t%llu"
2424 " to finish list\n", dtrq->dtrq_xid,
2425 dtrq->dtrq_master_transno);
2427 /* Add it to the replay finish list */
2428 spin_lock(&tdtd->tdtd_replay_list_lock);
2429 list_add(&dtrq->dtrq_list,
2430 &tdtd->tdtd_replay_finish_list);
2431 spin_unlock(&tdtd->tdtd_replay_list_lock);
2433 spin_lock(&obd->obd_recovery_task_lock);
2434 if (transno == obd->obd_next_recovery_transno)
2435 obd->obd_next_recovery_transno++;
2437 obd->obd_next_recovery_transno)
2438 obd->obd_next_recovery_transno =
2440 spin_unlock(&obd->obd_recovery_task_lock);
2445 spin_unlock(&obd->obd_recovery_task_lock);
2447 LASSERT(list_empty(&obd->obd_req_replay_queue));
2448 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
2449 /** evict exports failed VBR */
2450 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2456 static int target_recovery_thread(void *arg)
2458 struct lu_target *lut = arg;
2459 struct obd_device *obd = lut->lut_obd;
2460 struct ptlrpc_request *req;
2461 struct target_recovery_data *trd = &obd->obd_recovery_data;
2462 unsigned long delta;
2464 struct ptlrpc_thread *thread = NULL;
2468 unshare_fs_struct();
2469 OBD_ALLOC_PTR(thread);
2475 GOTO(out_thread, rc = -ENOMEM);
2476 rc = lu_env_add(env);
2480 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2482 GOTO(out_env_remove, rc);
2484 thread->t_env = env;
2485 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2486 env->le_ctx.lc_thread = thread;
2487 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2489 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2491 trd->trd_processing_task = current_pid();
2493 spin_lock(&obd->obd_dev_lock);
2494 obd->obd_recovering = 1;
2495 spin_unlock(&obd->obd_dev_lock);
2496 complete(&trd->trd_starting);
2498 /* first of all, we have to know the first transno to replay */
2499 if (target_recovery_overseer(lut, check_for_recovery_ready,
2500 exp_connect_healthy)) {
2501 abort_req_replay_queue(obd);
2502 abort_lock_replay_queue(obd);
2503 if (lut->lut_tdtd != NULL)
2504 dtrq_list_destroy(lut->lut_tdtd);
2507 /* next stage: replay requests or update */
2509 CDEBUG(D_INFO, "1: request replay stage - %d clients from t%llu\n",
2510 atomic_read(&obd->obd_req_replay_clients),
2511 obd->obd_next_recovery_transno);
2512 replay_request_or_update(env, lut, trd, thread);
2515 * The second stage: replay locks
2517 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2518 atomic_read(&obd->obd_lock_replay_clients));
2519 while ((req = target_next_replay_lock(lut))) {
2520 LASSERT(trd->trd_processing_task == current_pid());
2521 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2522 libcfs_nid2str(req->rq_peer.nid));
2523 handle_recovery_req(thread, req,
2524 trd->trd_recovery_handler);
2525 target_request_copy_put(req);
2526 obd->obd_replayed_locks++;
2530 * The third stage: reply on final pings, at this moment all clients
2531 * must have request in final queue
2533 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
2534 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2535 /** Update server last boot epoch */
2536 tgt_boot_epoch_update(lut);
2537 /* We drop recoverying flag to forward all new requests
2538 * to regular mds_handle() since now */
2539 spin_lock(&obd->obd_dev_lock);
2540 obd->obd_recovering = obd->obd_abort_recovery = 0;
2541 spin_unlock(&obd->obd_dev_lock);
2542 spin_lock(&obd->obd_recovery_task_lock);
2543 target_cancel_recovery_timer(obd);
2544 spin_unlock(&obd->obd_recovery_task_lock);
2545 while ((req = target_next_final_ping(obd))) {
2546 LASSERT(trd->trd_processing_task == current_pid());
2547 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2548 libcfs_nid2str(req->rq_peer.nid));
2549 handle_recovery_req(thread, req,
2550 trd->trd_recovery_handler);
2551 /* Because the waiting client can not send ping to server,
2552 * so we need refresh the last_request_time, to avoid the
2553 * export is being evicted */
2554 ptlrpc_update_export_timer(req->rq_export, 0);
2555 target_request_copy_put(req);
2558 delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
2559 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2560 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2561 if (delta > OBD_RECOVERY_TIME_SOFT) {
2562 CWARN("too long recovery - read logs\n");
2563 libcfs_debug_dumplog();
2566 target_finish_recovery(lut);
2568 lu_context_fini(&env->le_ctx);
2569 trd->trd_processing_task = 0;
2570 complete(&trd->trd_finishing);
2572 tgt_io_thread_done(thread);
2578 OBD_FREE_PTR(thread);
2582 static int target_start_recovery_thread(struct lu_target *lut,
2583 svc_handler_t handler)
2585 struct obd_device *obd = lut->lut_obd;
2587 struct target_recovery_data *trd = &obd->obd_recovery_data;
2590 memset(trd, 0, sizeof(*trd));
2591 init_completion(&trd->trd_starting);
2592 init_completion(&trd->trd_finishing);
2593 trd->trd_recovery_handler = handler;
2595 rc = server_name2index(obd->obd_name, &index, NULL);
2599 if (!IS_ERR(kthread_run(target_recovery_thread,
2600 lut, "tgt_recover_%d", index))) {
2601 wait_for_completion(&trd->trd_starting);
2602 LASSERT(obd->obd_recovering != 0);
2610 void target_stop_recovery_thread(struct obd_device *obd)
2612 if (obd->obd_recovery_data.trd_processing_task > 0) {
2613 struct target_recovery_data *trd = &obd->obd_recovery_data;
2614 /** recovery can be done but postrecovery is not yet */
2615 spin_lock(&obd->obd_dev_lock);
2616 if (obd->obd_recovering) {
2617 CERROR("%s: Aborting recovery\n", obd->obd_name);
2618 obd->obd_abort_recovery = 1;
2619 wake_up(&obd->obd_next_transno_waitq);
2621 spin_unlock(&obd->obd_dev_lock);
2622 wait_for_completion(&trd->trd_finishing);
2625 EXPORT_SYMBOL(target_stop_recovery_thread);
2627 void target_recovery_fini(struct obd_device *obd)
2629 class_disconnect_exports(obd);
2630 target_stop_recovery_thread(obd);
2631 target_cleanup_recovery(obd);
2633 EXPORT_SYMBOL(target_recovery_fini);
2635 static enum hrtimer_restart target_recovery_expired(struct hrtimer *timer)
2637 struct obd_device *obd = container_of(timer, struct obd_device,
2638 obd_recovery_timer);
2641 "%s: recovery timed out; %d clients are still in recovery after %llu seconds (%d clients connected)\n",
2642 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
2643 ktime_get_real_seconds() - obd->obd_recovery_start,
2644 atomic_read(&obd->obd_connected_clients));
2646 obd->obd_recovery_expired = 1;
2647 wake_up(&obd->obd_next_transno_waitq);
2648 return HRTIMER_NORESTART;
2651 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2653 struct obd_device *obd = lut->lut_obd;
2655 if (lut->lut_bottom->dd_rdonly)
2658 if (obd->obd_max_recoverable_clients == 0) {
2659 /** Update server last boot epoch */
2660 tgt_boot_epoch_update(lut);
2664 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2665 "last_transno %llu\n", obd->obd_name,
2666 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2667 LASSERT(obd->obd_stopping == 0);
2668 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2669 obd->obd_recovery_start = 0;
2670 obd->obd_recovery_end = 0;
2672 hrtimer_init(&obd->obd_recovery_timer, CLOCK_REALTIME,
2674 obd->obd_recovery_timer.function = &target_recovery_expired;
2675 target_start_recovery_thread(lut, handler);
2677 EXPORT_SYMBOL(target_recovery_init);
2679 static int target_process_req_flags(struct obd_device *obd,
2680 struct ptlrpc_request *req)
2682 struct obd_export *exp = req->rq_export;
2683 LASSERT(exp != NULL);
2684 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2685 /* client declares he's ready to replay locks */
2686 spin_lock(&exp->exp_lock);
2687 if (exp->exp_req_replay_needed) {
2688 exp->exp_req_replay_needed = 0;
2689 spin_unlock(&exp->exp_lock);
2691 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2692 atomic_dec(&obd->obd_req_replay_clients);
2694 spin_unlock(&exp->exp_lock);
2697 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2698 /* client declares he's ready to complete recovery
2699 * so, we put the request on th final queue */
2700 spin_lock(&exp->exp_lock);
2701 if (exp->exp_lock_replay_needed) {
2702 exp->exp_lock_replay_needed = 0;
2703 spin_unlock(&exp->exp_lock);
2705 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2706 atomic_dec(&obd->obd_lock_replay_clients);
2708 spin_unlock(&exp->exp_lock);
2714 int target_queue_recovery_request(struct ptlrpc_request *req,
2715 struct obd_device *obd)
2717 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2718 struct ptlrpc_request *reqiter;
2722 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2723 /* Processing the queue right now, don't re-add. */
2727 target_process_req_flags(obd, req);
2729 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2730 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
2731 if (cfs_fail_val == 1) {
2734 wake_up(&cfs_race_waitq);
2736 set_current_state(TASK_INTERRUPTIBLE);
2737 schedule_timeout(cfs_time_seconds(1));
2741 /* client declares he's ready to complete recovery
2742 * so, we put the request on th final queue */
2743 target_request_copy_get(req);
2744 DEBUG_REQ(D_HA, req, "queue final req");
2745 wake_up(&obd->obd_next_transno_waitq);
2746 spin_lock(&obd->obd_recovery_task_lock);
2747 if (obd->obd_recovering) {
2748 struct ptlrpc_request *tmp;
2749 struct ptlrpc_request *duplicate = NULL;
2751 if (likely(!req->rq_export->exp_replay_done)) {
2752 req->rq_export->exp_replay_done = 1;
2753 list_add_tail(&req->rq_list,
2754 &obd->obd_final_req_queue);
2755 spin_unlock(&obd->obd_recovery_task_lock);
2759 /* XXX O(n), but only happens if final ping is
2760 * timed out, probably reorganize the list as
2761 * a hash list later */
2762 list_for_each_entry_safe(reqiter, tmp,
2763 &obd->obd_final_req_queue,
2765 if (reqiter->rq_export == req->rq_export) {
2766 list_del_init(&reqiter->rq_list);
2767 duplicate = reqiter;
2772 list_add_tail(&req->rq_list,
2773 &obd->obd_final_req_queue);
2774 req->rq_export->exp_replay_done = 1;
2775 spin_unlock(&obd->obd_recovery_task_lock);
2777 if (duplicate != NULL) {
2778 DEBUG_REQ(D_HA, duplicate,
2779 "put prev final req\n");
2780 target_request_copy_put(duplicate);
2784 spin_unlock(&obd->obd_recovery_task_lock);
2785 target_request_copy_put(req);
2786 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2789 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2790 /* client declares he's ready to replay locks */
2791 target_request_copy_get(req);
2792 DEBUG_REQ(D_HA, req, "queue lock replay req");
2793 wake_up(&obd->obd_next_transno_waitq);
2794 spin_lock(&obd->obd_recovery_task_lock);
2795 LASSERT(obd->obd_recovering);
2796 /* usually due to recovery abort */
2797 if (!req->rq_export->exp_in_recovery) {
2798 spin_unlock(&obd->obd_recovery_task_lock);
2799 target_request_copy_put(req);
2802 LASSERT(req->rq_export->exp_lock_replay_needed);
2803 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2804 spin_unlock(&obd->obd_recovery_task_lock);
2808 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2809 * (i.e. buflens etc are in my own byte order), but type-dependent
2810 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2813 INIT_LIST_HEAD(&req->rq_list);
2814 DEBUG_REQ(D_HA, req, "not queueing");
2818 /* If we're processing the queue, we want don't want to queue this
2821 * Also, if this request has a transno less than the one we're waiting
2822 * for, we should process it now. It could (and currently always will)
2823 * be an open request for a descriptor that was opened some time ago.
2825 * Also, a resent, replayed request that has already been
2826 * handled will pass through here and be processed immediately.
2828 CDEBUG(D_HA, "Next recovery transno: %llu"
2829 ", current: %llu, replaying\n",
2830 obd->obd_next_recovery_transno, transno);
2832 /* If the request has been replayed by update replay, then sends this
2833 * request to the recovery thread (replay_request_or_update()), where
2834 * it will be handled */
2835 spin_lock(&obd->obd_recovery_task_lock);
2836 if (transno < obd->obd_next_recovery_transno &&
2837 !is_req_replayed_by_update(req)) {
2838 /* Processing the queue right now, don't re-add. */
2839 LASSERT(list_empty(&req->rq_list));
2840 spin_unlock(&obd->obd_recovery_task_lock);
2843 spin_unlock(&obd->obd_recovery_task_lock);
2845 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2848 target_request_copy_get(req);
2849 if (!req->rq_export->exp_in_recovery) {
2850 target_request_copy_put(req);
2853 LASSERT(req->rq_export->exp_req_replay_needed);
2855 if (target_exp_enqueue_req_replay(req)) {
2856 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2857 target_request_copy_put(req);
2862 spin_lock(&obd->obd_recovery_task_lock);
2863 LASSERT(obd->obd_recovering);
2864 list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
2865 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2866 list_add_tail(&req->rq_list, &reqiter->rq_list);
2871 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2873 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2874 "has been claimed by another client");
2875 spin_unlock(&obd->obd_recovery_task_lock);
2876 target_exp_dequeue_req_replay(req);
2877 target_request_copy_put(req);
2883 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2885 obd->obd_requests_queued_for_recovery++;
2886 spin_unlock(&obd->obd_recovery_task_lock);
2887 wake_up(&obd->obd_next_transno_waitq);
2891 void target_committed_to_req(struct ptlrpc_request *req)
2893 struct obd_export *exp = req->rq_export;
2895 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2896 lustre_msg_set_last_committed(req->rq_repmsg,
2897 exp->exp_last_committed);
2899 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2900 "%d)", exp->exp_obd->obd_no_transno,
2901 req->rq_repmsg == NULL);
2903 CDEBUG(D_INFO, "last_committed %llu, transno %llu, xid %llu\n",
2904 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2907 #endif /* HAVE_SERVER_SUPPORT */
2910 * Packs current SLV and Limit into \a req.
2912 int target_pack_pool_reply(struct ptlrpc_request *req)
2914 struct obd_device *obd;
2917 /* Check that we still have all structures alive as this may
2918 * be some late RPC at shutdown time. */
2919 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2920 !exp_connect_lru_resize(req->rq_export))) {
2921 lustre_msg_set_slv(req->rq_repmsg, 0);
2922 lustre_msg_set_limit(req->rq_repmsg, 0);
2926 /* OBD is alive here as export is alive, which we checked above. */
2927 obd = req->rq_export->exp_obd;
2929 read_lock(&obd->obd_pool_lock);
2930 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2931 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2932 read_unlock(&obd->obd_pool_lock);
2937 static int target_send_reply_msg(struct ptlrpc_request *req,
2938 int rc, int fail_id)
2940 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2941 DEBUG_REQ(D_ERROR, req, "dropping reply");
2944 /* We can have a null rq_reqmsg in the event of bad signature or
2945 * no context when unwrapping */
2946 if (req->rq_reqmsg &&
2947 unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
2948 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
2952 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2953 req->rq_status = rc;
2954 return ptlrpc_send_error(req, 1);
2956 DEBUG_REQ(D_NET, req, "sending reply");
2959 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
2962 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2964 struct ptlrpc_service_part *svcpt;
2966 struct ptlrpc_reply_state *rs;
2967 struct obd_export *exp;
2970 if (req->rq_no_reply) {
2975 svcpt = req->rq_rqbd->rqbd_svcpt;
2976 rs = req->rq_reply_state;
2977 if (rs == NULL || !rs->rs_difficult) {
2979 target_send_reply_msg (req, rc, fail_id);
2984 /* must be an export if locks saved */
2985 LASSERT(req->rq_export != NULL);
2986 /* req/reply consistent */
2987 LASSERT(rs->rs_svcpt == svcpt);
2990 LASSERT(!rs->rs_scheduled);
2991 LASSERT(!rs->rs_scheduled_ever);
2992 LASSERT(!rs->rs_handled);
2993 LASSERT(!rs->rs_on_net);
2994 LASSERT(rs->rs_export == NULL);
2995 LASSERT(list_empty(&rs->rs_obd_list));
2996 LASSERT(list_empty(&rs->rs_exp_list));
2998 exp = class_export_get(req->rq_export);
3000 /* disable reply scheduling while I'm setting up */
3001 rs->rs_scheduled = 1;
3003 rs->rs_xid = req->rq_xid;
3004 rs->rs_transno = req->rq_transno;
3005 rs->rs_export = exp;
3006 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
3008 spin_lock(&exp->exp_uncommitted_replies_lock);
3009 CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
3010 rs->rs_transno, exp->exp_last_committed);
3011 if (rs->rs_transno > exp->exp_last_committed) {
3012 /* not committed already */
3013 list_add_tail(&rs->rs_obd_list,
3014 &exp->exp_uncommitted_replies);
3016 spin_unlock(&exp->exp_uncommitted_replies_lock);
3018 spin_lock(&exp->exp_lock);
3019 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
3020 spin_unlock(&exp->exp_lock);
3022 netrc = target_send_reply_msg(req, rc, fail_id);
3024 spin_lock(&svcpt->scp_rep_lock);
3026 atomic_inc(&svcpt->scp_nreps_difficult);
3029 /* error sending: reply is off the net. Also we need +1
3030 * reply ref until ptlrpc_handle_rs() is done
3031 * with the reply state (if the send was successful, there
3032 * would have been +1 ref for the net, which
3033 * reply_out_callback leaves alone) */
3035 ptlrpc_rs_addref(rs);
3038 spin_lock(&rs->rs_lock);
3039 if (rs->rs_transno <= exp->exp_last_committed ||
3040 (!rs->rs_on_net && !rs->rs_no_ack) ||
3041 list_empty(&rs->rs_exp_list) || /* completed already */
3042 list_empty(&rs->rs_obd_list)) {
3043 CDEBUG(D_HA, "Schedule reply immediately\n");
3044 ptlrpc_dispatch_difficult_reply(rs);
3046 list_add(&rs->rs_list, &svcpt->scp_rep_active);
3047 rs->rs_scheduled = 0; /* allow notifier to schedule */
3049 spin_unlock(&rs->rs_lock);
3050 spin_unlock(&svcpt->scp_rep_lock);
3054 enum ldlm_mode lck_compat_array[] = {
3055 [LCK_EX] = LCK_COMPAT_EX,
3056 [LCK_PW] = LCK_COMPAT_PW,
3057 [LCK_PR] = LCK_COMPAT_PR,
3058 [LCK_CW] = LCK_COMPAT_CW,
3059 [LCK_CR] = LCK_COMPAT_CR,
3060 [LCK_NL] = LCK_COMPAT_NL,
3061 [LCK_GROUP] = LCK_COMPAT_GROUP,
3062 [LCK_COS] = LCK_COMPAT_COS,
3066 * Rather arbitrary mapping from LDLM error codes to errno values. This should
3067 * not escape to the user level.
3069 int ldlm_error2errno(enum ldlm_error error)
3075 case ELDLM_LOCK_MATCHED:
3078 case ELDLM_LOCK_CHANGED:
3081 case ELDLM_LOCK_ABORTED:
3084 case ELDLM_LOCK_REPLACED:
3087 case ELDLM_NO_LOCK_DATA:
3090 case ELDLM_NAMESPACE_EXISTS:
3093 case ELDLM_BAD_NAMESPACE:
3097 if (((int)error) < 0) { /* cast to signed type */
3098 result = error; /* as ldlm_error can be unsigned */
3100 CERROR("Invalid DLM result code: %d\n", error);
3106 EXPORT_SYMBOL(ldlm_error2errno);
3109 * Dual to ldlm_error2errno(): maps errno values back to enum ldlm_error.
3111 enum ldlm_error ldlm_errno2error(int err_no)
3120 error = ELDLM_LOCK_CHANGED;
3123 error = ELDLM_LOCK_ABORTED;
3126 error = ELDLM_LOCK_REPLACED;
3129 error = ELDLM_NO_LOCK_DATA;
3132 error = ELDLM_NAMESPACE_EXISTS;
3135 error = ELDLM_BAD_NAMESPACE;
3143 #if LUSTRE_TRACKS_LOCK_EXP_REFS
3144 void ldlm_dump_export_locks(struct obd_export *exp)
3146 spin_lock(&exp->exp_locks_list_guard);
3147 if (!list_empty(&exp->exp_locks_list)) {
3148 struct ldlm_lock *lock;
3150 CERROR("dumping locks for export %p,"
3151 "ignore if the unmount doesn't hang\n", exp);
3152 list_for_each_entry(lock, &exp->exp_locks_list,
3154 LDLM_ERROR(lock, "lock:");
3156 spin_unlock(&exp->exp_locks_list_guard);
3160 #ifdef HAVE_SERVER_SUPPORT
3161 static int target_bulk_timeout(void *data)
3164 /* We don't fail the connection here, because having the export
3165 * killed makes the (vital) call to commitrw very sad.
3170 static inline const char *bulk2type(struct ptlrpc_request *req)
3172 if (req->rq_bulk_read)
3174 if (req->rq_bulk_write)
3179 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
3180 struct l_wait_info *lwi)
3182 struct ptlrpc_request *req = desc->bd_req;
3183 time64_t start = ktime_get_real_seconds();
3189 /* If there is eviction in progress, wait for it to finish. */
3190 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
3191 *lwi = LWI_INTR(NULL, NULL);
3192 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
3193 !atomic_read(&exp->exp_obd->
3194 obd_evict_inprogress),
3198 /* Check if client was evicted or reconnected already. */
3199 if (exp->exp_failed ||
3200 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3203 if (req->rq_bulk_read)
3204 rc = sptlrpc_svc_wrap_bulk(req, desc);
3206 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
3207 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
3208 else /* old version, bulk matchbits is rq_xid */
3209 req->rq_mbits = req->rq_xid;
3212 rc = ptlrpc_start_bulk_transfer(desc);
3216 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
3217 bulk2type(req), rc);
3221 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
3222 ptlrpc_abort_bulk(desc);
3226 /* limit actual bulk transfer to bulk_timeout seconds */
3227 deadline = start + bulk_timeout;
3228 if (deadline > req->rq_deadline)
3229 deadline = req->rq_deadline;
3232 time64_t timeoutl = deadline - ktime_get_real_seconds();
3233 long timeout_jiffies = timeoutl <= 0 ?
3234 1 : cfs_time_seconds(timeoutl);
3235 time64_t rq_deadline;
3237 *lwi = LWI_TIMEOUT_INTERVAL(timeout_jiffies,
3238 cfs_time_seconds(1),
3239 target_bulk_timeout, desc);
3240 rc = l_wait_event(desc->bd_waitq,
3241 !ptlrpc_server_bulk_active(desc) ||
3244 lustre_msg_get_conn_cnt(req->rq_reqmsg),
3246 LASSERT(rc == 0 || rc == -ETIMEDOUT);
3247 /* Wait again if we changed rq_deadline. */
3248 rq_deadline = READ_ONCE(req->rq_deadline);
3249 deadline = start + bulk_timeout;
3250 if (deadline > rq_deadline)
3251 deadline = rq_deadline;
3252 } while (rc == -ETIMEDOUT &&
3253 deadline > ktime_get_real_seconds());
3255 if (rc == -ETIMEDOUT) {
3256 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %lld%+llds",
3257 bulk2type(req), deadline - start,
3258 ktime_get_real_seconds() - deadline);
3259 ptlrpc_abort_bulk(desc);
3260 } else if (exp->exp_failed) {
3261 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
3264 ptlrpc_abort_bulk(desc);
3265 } else if (exp->exp_conn_cnt >
3266 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3267 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
3269 /* We don't reply anyway. */
3271 ptlrpc_abort_bulk(desc);
3272 } else if (desc->bd_failure) {
3273 DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
3275 /* XXX should this be a different errno? */
3278 if (req->rq_bulk_write)
3279 rc = sptlrpc_svc_unwrap_bulk(req, desc);
3280 if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
3281 DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
3282 bulk2type(req), desc->bd_nob_transferred,
3284 /* XXX should this be a different errno? */
3291 EXPORT_SYMBOL(target_bulk_io);
3293 #endif /* HAVE_SERVER_SUPPORT */