1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_LDLM
43 # include <libcfs/libcfs.h>
45 # include <liblustre.h>
48 #include <lustre_mds.h>
49 #include <lustre_dlm.h>
50 #include <lustre_net.h>
51 #include <lustre_sec.h>
52 #include "ldlm_internal.h"
54 /* @priority: if non-zero, move the selected to the list head
55 * @create: if zero, only search in existed connections
57 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
58 int priority, int create)
60 struct ptlrpc_connection *ptlrpc_conn;
61 struct obd_import_conn *imp_conn = NULL, *item;
65 if (!create && !priority) {
66 CDEBUG(D_HA, "Nothing to do\n");
70 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
72 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
77 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
79 GOTO(out_put, rc = -ENOMEM);
83 spin_lock(&imp->imp_lock);
84 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
85 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
87 list_del(&item->oic_item);
88 list_add(&item->oic_item, &imp->imp_conn_list);
89 item->oic_last_attempt = 0;
91 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
92 imp, imp->imp_obd->obd_name, uuid->uuid,
93 (priority ? ", moved to head" : ""));
94 spin_unlock(&imp->imp_lock);
95 GOTO(out_free, rc = 0);
100 imp_conn->oic_conn = ptlrpc_conn;
101 imp_conn->oic_uuid = *uuid;
102 imp_conn->oic_last_attempt = 0;
104 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
106 list_add_tail(&imp_conn->oic_item, &imp->imp_conn_list);
107 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
108 imp, imp->imp_obd->obd_name, uuid->uuid,
109 (priority ? "head" : "tail"));
111 spin_unlock(&imp->imp_lock);
112 GOTO(out_free, rc = -ENOENT);
115 spin_unlock(&imp->imp_lock);
119 OBD_FREE(imp_conn, sizeof(*imp_conn));
121 ptlrpc_connection_put(ptlrpc_conn);
125 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
127 return import_set_conn(imp, uuid, 1, 0);
130 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
133 return import_set_conn(imp, uuid, priority, 1);
136 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
138 struct obd_import_conn *imp_conn;
139 struct obd_export *dlmexp;
143 spin_lock(&imp->imp_lock);
144 if (list_empty(&imp->imp_conn_list)) {
145 LASSERT(!imp->imp_connection);
149 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
150 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
152 LASSERT(imp_conn->oic_conn);
154 /* is current conn? */
155 if (imp_conn == imp->imp_conn_current) {
156 LASSERT(imp_conn->oic_conn == imp->imp_connection);
158 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
159 imp->imp_state != LUSTRE_IMP_DISCON) {
160 CERROR("can't remove current connection\n");
161 GOTO(out, rc = -EBUSY);
164 ptlrpc_connection_put(imp->imp_connection);
165 imp->imp_connection = NULL;
167 dlmexp = class_conn2export(&imp->imp_dlm_handle);
168 if (dlmexp && dlmexp->exp_connection) {
169 LASSERT(dlmexp->exp_connection ==
171 ptlrpc_connection_put(dlmexp->exp_connection);
172 dlmexp->exp_connection = NULL;
176 list_del(&imp_conn->oic_item);
177 ptlrpc_connection_put(imp_conn->oic_conn);
178 OBD_FREE(imp_conn, sizeof(*imp_conn));
179 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
180 imp, imp->imp_obd->obd_name, uuid->uuid);
185 spin_unlock(&imp->imp_lock);
187 CERROR("connection %s not found\n", uuid->uuid);
191 void client_destroy_import(struct obd_import *imp)
193 /* drop security policy instance after all rpc finished/aborted
194 * to let all busy contexts be released. */
195 class_import_get(imp);
196 class_destroy_import(imp);
197 sptlrpc_import_sec_put(imp);
198 class_import_put(imp);
201 /* configure an RPC client OBD device
206 * 3 - inactive-on-startup
208 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
210 struct client_obd *cli = &obddev->u.cli;
211 struct obd_import *imp;
212 struct obd_uuid server_uuid;
213 int rq_portal, rp_portal, connect_op;
214 char *name = obddev->obd_type->typ_name;
218 /* In a more perfect world, we would hang a ptlrpc_client off of
219 * obd_type and just use the values from there. */
220 if (!strcmp(name, LUSTRE_OSC_NAME)) {
221 rq_portal = OST_REQUEST_PORTAL;
222 rp_portal = OSC_REPLY_PORTAL;
223 connect_op = OST_CONNECT;
224 cli->cl_sp_me = LUSTRE_SP_CLI;
225 cli->cl_sp_to = LUSTRE_SP_OST;
226 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
227 rq_portal = MDS_REQUEST_PORTAL;
228 rp_portal = MDC_REPLY_PORTAL;
229 connect_op = MDS_CONNECT;
230 cli->cl_sp_me = LUSTRE_SP_CLI;
231 cli->cl_sp_to = LUSTRE_SP_MDT;
232 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
233 rq_portal = MGS_REQUEST_PORTAL;
234 rp_portal = MGC_REPLY_PORTAL;
235 connect_op = MGS_CONNECT;
236 cli->cl_sp_me = LUSTRE_SP_MGC;
237 cli->cl_sp_to = LUSTRE_SP_MGS;
238 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
240 CERROR("unknown client OBD type \"%s\", can't setup\n",
245 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
246 CERROR("requires a TARGET UUID\n");
250 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
251 CERROR("client UUID must be less than 38 characters\n");
255 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
256 CERROR("setup requires a SERVER UUID\n");
260 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
261 CERROR("target UUID must be less than 38 characters\n");
265 init_rwsem(&cli->cl_sem);
266 sema_init(&cli->cl_mgc_sem, 1);
267 cli->cl_conn_count = 0;
268 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
269 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
270 sizeof(server_uuid)));
273 cli->cl_avail_grant = 0;
274 /* FIXME: should limit this for the sum of all cl_dirty_max */
275 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
276 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > num_physpages / 8)
277 cli->cl_dirty_max = num_physpages << (CFS_PAGE_SHIFT - 3);
278 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
279 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
280 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
281 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
282 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
283 client_obd_list_lock_init(&cli->cl_loi_list_lock);
284 cli->cl_r_in_flight = 0;
285 cli->cl_w_in_flight = 0;
287 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
288 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
289 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
290 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
291 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
292 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
293 cfs_waitq_init(&cli->cl_destroy_waitq);
294 atomic_set(&cli->cl_destroy_in_flight, 0);
295 #ifdef ENABLE_CHECKSUM
296 /* Turn on checksumming by default. */
297 cli->cl_checksum = 1;
299 * The supported checksum types will be worked out at connect time
300 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
303 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
305 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
307 /* This value may be changed at connect time in
308 ptlrpc_connect_interpret. */
309 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
310 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
312 if (!strcmp(name, LUSTRE_MDC_NAME)) {
313 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
314 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
315 cli->cl_max_rpcs_in_flight = 2;
316 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
317 cli->cl_max_rpcs_in_flight = 3;
318 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
319 cli->cl_max_rpcs_in_flight = 4;
321 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
326 CERROR("ldlm_get_ref failed: %d\n", rc);
330 ptlrpc_init_client(rq_portal, rp_portal, name,
331 &obddev->obd_ldlm_client);
333 imp = class_new_import(obddev);
335 GOTO(err_ldlm, rc = -ENOENT);
336 imp->imp_client = &obddev->obd_ldlm_client;
337 imp->imp_connect_op = connect_op;
338 imp->imp_initial_recov = 1;
339 imp->imp_initial_recov_bk = 0;
340 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
341 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
342 LUSTRE_CFG_BUFLEN(lcfg, 1));
343 class_import_put(imp);
345 rc = client_import_add_conn(imp, &server_uuid, 1);
347 CERROR("can't add initial connection\n");
348 GOTO(err_import, rc);
351 cli->cl_import = imp;
352 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
353 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
354 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
356 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
357 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
358 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
359 name, obddev->obd_name,
360 cli->cl_target_uuid.uuid);
361 spin_lock(&imp->imp_lock);
362 imp->imp_deactive = 1;
363 spin_unlock(&imp->imp_lock);
367 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
368 LDLM_NAMESPACE_CLIENT,
369 LDLM_NAMESPACE_GREEDY);
370 if (obddev->obd_namespace == NULL) {
371 CERROR("Unable to create client namespace - %s\n",
373 GOTO(err_import, rc = -ENOMEM);
376 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
381 class_destroy_import(imp);
389 int client_obd_cleanup(struct obd_device *obddev)
393 ldlm_namespace_free_post(obddev->obd_namespace);
394 obddev->obd_namespace = NULL;
400 /* ->o_connect() method for client side (OSC and MDC and MGC) */
401 int client_connect_import(const struct lu_env *env,
402 struct obd_export **exp,
403 struct obd_device *obd, struct obd_uuid *cluuid,
404 struct obd_connect_data *data, void *localdata)
406 struct client_obd *cli = &obd->u.cli;
407 struct obd_import *imp = cli->cl_import;
408 struct obd_connect_data *ocd;
409 struct lustre_handle conn = { 0 };
414 down_write(&cli->cl_sem);
415 if (cli->cl_conn_count > 0 )
416 GOTO(out_sem, rc = -EALREADY);
418 rc = class_connect(&conn, obd, cluuid);
422 cli->cl_conn_count++;
423 *exp = class_conn2export(&conn);
425 LASSERT(obd->obd_namespace);
427 imp->imp_dlm_handle = conn;
428 rc = ptlrpc_init_import(imp);
432 ocd = &imp->imp_connect_data;
435 imp->imp_connect_flags_orig = data->ocd_connect_flags;
438 rc = ptlrpc_connect_import(imp, NULL);
440 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
443 LASSERT((*exp)->exp_connection);
446 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
447 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
448 data->ocd_connect_flags, ocd->ocd_connect_flags);
449 data->ocd_connect_flags = ocd->ocd_connect_flags;
452 ptlrpc_pinger_add_import(imp);
458 cli->cl_conn_count--;
459 class_disconnect(*exp);
463 up_write(&cli->cl_sem);
468 int client_disconnect_export(struct obd_export *exp)
470 struct obd_device *obd = class_exp2obd(exp);
471 struct client_obd *cli;
472 struct obd_import *imp;
477 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
478 exp, exp ? exp->exp_handle.h_cookie : -1);
483 imp = cli->cl_import;
485 down_write(&cli->cl_sem);
486 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
489 if (!cli->cl_conn_count) {
490 CERROR("disconnecting disconnected device (%s)\n",
492 GOTO(out_disconnect, rc = -EINVAL);
495 cli->cl_conn_count--;
496 if (cli->cl_conn_count)
497 GOTO(out_disconnect, rc = 0);
499 /* Mark import deactivated now, so we don't try to reconnect if any
500 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
501 * fully deactivate the import, or that would drop all requests. */
502 spin_lock(&imp->imp_lock);
503 imp->imp_deactive = 1;
504 spin_unlock(&imp->imp_lock);
506 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
507 * delete it regardless. (It's safe to delete an import that was
509 (void)ptlrpc_pinger_del_import(imp);
511 if (obd->obd_namespace != NULL) {
512 /* obd_force == local only */
513 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
514 obd->obd_force ? LDLM_FL_LOCAL_ONLY:0,
516 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
520 * there's no necessary to hold sem during diconnecting an import,
521 * and actually it may cause deadlock in gss.
523 up_write(&cli->cl_sem);
524 rc = ptlrpc_disconnect_import(imp, 0);
525 down_write(&cli->cl_sem);
527 ptlrpc_invalidate_import(imp);
529 if (imp->imp_rq_pool) {
530 ptlrpc_free_rq_pool(imp->imp_rq_pool);
531 imp->imp_rq_pool = NULL;
533 client_destroy_import(imp);
534 cli->cl_import = NULL;
539 /* use server style - class_disconnect should be always called for
541 err = class_disconnect(exp);
545 up_write(&cli->cl_sem);
550 /* --------------------------------------------------------------------------
551 * from old lib/target.c
552 * -------------------------------------------------------------------------- */
554 static int target_handle_reconnect(struct lustre_handle *conn,
555 struct obd_export *exp,
556 struct obd_uuid *cluuid)
559 if (exp->exp_connection && exp->exp_imp_reverse) {
560 struct lustre_handle *hdl;
561 hdl = &exp->exp_imp_reverse->imp_remote_handle;
562 /* Might be a re-connect after a partition. */
563 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
564 CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name,
566 conn->cookie = exp->exp_handle.h_cookie;
567 /* target_handle_connect() treats EALREADY and
568 * -EALREADY differently. EALREADY means we are
569 * doing a valid reconnect from the same client. */
572 CERROR("%s reconnecting from %s, "
573 "handle mismatch (ours "LPX64", theirs "
574 LPX64")\n", cluuid->uuid,
575 exp->exp_connection->c_remote_uuid.uuid,
576 hdl->cookie, conn->cookie);
577 memset(conn, 0, sizeof *conn);
578 /* target_handle_connect() treats EALREADY and
579 * -EALREADY differently. -EALREADY is an error
580 * (same UUID, different handle). */
585 conn->cookie = exp->exp_handle.h_cookie;
586 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
587 cluuid->uuid, exp, conn->cookie);
591 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
594 struct obd_export *exp = cb_data;
596 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
597 obd->obd_name, exp->exp_client_uuid.uuid);
599 spin_lock(&exp->exp_lock);
600 exp->exp_need_sync = 0;
601 spin_unlock(&exp->exp_lock);
603 EXPORT_SYMBOL(target_client_add_cb);
605 target_start_and_reset_recovery_timer(struct obd_device *obd,
606 struct ptlrpc_request *req,
609 int target_handle_connect(struct ptlrpc_request *req)
611 struct obd_device *target, *targref = NULL;
612 struct obd_export *export = NULL;
613 struct obd_import *revimp;
614 struct lustre_handle conn;
615 struct lustre_handle *tmp;
616 struct obd_uuid tgtuuid;
617 struct obd_uuid cluuid;
618 struct obd_uuid remote_uuid;
622 struct obd_connect_data *data, *tmpdata;
623 lnet_nid_t *client_nid = NULL;
626 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
628 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
630 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
631 GOTO(out, rc = -EINVAL);
634 obd_str2uuid(&tgtuuid, str);
635 target = class_uuid2obd(&tgtuuid);
637 target = class_name2obd(str);
639 if (!target || target->obd_stopping || !target->obd_set_up) {
640 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available "
641 " for connect (%s)\n", str,
642 !target ? "no target" :
643 (target->obd_stopping ? "stopping" :
645 GOTO(out, rc = -ENODEV);
648 if (target->obd_no_conn) {
649 LCONSOLE_WARN("%s: temporarily refusing client connection "
650 "from %s\n", target->obd_name,
651 libcfs_nid2str(req->rq_peer.nid));
652 GOTO(out, rc = -EAGAIN);
655 /* Make sure the target isn't cleaned up while we're here. Yes,
656 there's still a race between the above check and our incref here.
657 Really, class_uuid2obd should take the ref. */
658 targref = class_incref(target, __FUNCTION__, cfs_current());
661 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
663 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
664 GOTO(out, rc = -EINVAL);
667 obd_str2uuid(&cluuid, str);
669 /* XXX extract a nettype and format accordingly */
670 switch (sizeof(lnet_nid_t)) {
671 /* NB the casts only avoid compiler warnings */
673 snprintf(remote_uuid.uuid, sizeof remote_uuid,
674 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
677 snprintf(remote_uuid.uuid, sizeof remote_uuid,
678 "NET_%x_UUID", (__u32)req->rq_peer.nid);
684 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
686 GOTO(out, rc = -EPROTO);
690 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
692 GOTO(out, rc = -EPROTO);
694 rc = req_capsule_server_pack(&req->rq_pill);
698 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
700 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
701 "libclient connection attempt");
702 GOTO(out, rc = -EPROTO);
703 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
704 LUSTRE_VERSION_ALLOWED_OFFSET ||
705 data->ocd_version > LUSTRE_VERSION_CODE +
706 LUSTRE_VERSION_ALLOWED_OFFSET) {
707 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
708 "libclient connection attempt",
709 data->ocd_version < LUSTRE_VERSION_CODE ?
711 OBD_OCD_VERSION_MAJOR(data->ocd_version),
712 OBD_OCD_VERSION_MINOR(data->ocd_version),
713 OBD_OCD_VERSION_PATCH(data->ocd_version),
714 OBD_OCD_VERSION_FIX(data->ocd_version));
715 data = req_capsule_server_sized_get(&req->rq_pill,
717 offsetof(typeof(*data), ocd_version) +
718 sizeof(data->ocd_version));
720 data->ocd_connect_flags = OBD_CONNECT_VERSION;
721 data->ocd_version = LUSTRE_VERSION_CODE;
723 GOTO(out, rc = -EPROTO);
727 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
728 (data->ocd_connect_flags & OBD_CONNECT_MDS))
731 /* lctl gets a backstage, all-access pass. */
732 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
733 goto dont_check_exports;
735 export = lustre_hash_lookup(target->obd_uuid_hash, &cluuid);
739 /* we've found an export in the hash */
740 if (export->exp_connecting) { /* bug 9635, et. al. */
741 CWARN("%s: exp %p already connecting\n",
742 export->exp_obd->obd_name, export);
743 class_export_put(export);
746 } else if (mds_conn && export->exp_connection) {
747 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
748 /* mds reconnected after failover */
749 CWARN("%s: received MDS connection from NID %s,"
750 " removing former export from NID %s\n",
751 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
752 libcfs_nid2str(export->exp_connection->c_peer.nid));
754 /* new mds connection from the same nid */
755 CWARN("%s: received new MDS connection from NID %s,"
756 " removing former export from same NID\n",
757 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
758 class_fail_export(export);
759 class_export_put(export);
762 } else if (export->exp_connection != NULL &&
763 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
764 (lustre_msg_get_op_flags(req->rq_reqmsg) &
765 MSG_CONNECT_INITIAL)) {
766 /* in mds failover we have static uuid but nid can be
768 CWARN("%s: cookie %s seen on new NID %s when "
769 "existing NID %s is already connected\n",
770 target->obd_name, cluuid.uuid,
771 libcfs_nid2str(req->rq_peer.nid),
772 libcfs_nid2str(export->exp_connection->c_peer.nid));
774 class_export_put(export);
777 spin_lock(&export->exp_lock);
778 export->exp_connecting = 1;
779 spin_unlock(&export->exp_lock);
780 class_export_put(export);
781 LASSERT(export->exp_obd == target);
783 rc = target_handle_reconnect(&conn, export, &cluuid);
786 /* If we found an export, we already unlocked. */
789 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
790 } else if (req->rq_export == NULL &&
791 atomic_read(&export->exp_rpc_count) > 0) {
792 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
793 target->obd_name, cluuid.uuid,
794 libcfs_nid2str(req->rq_peer.nid),
795 export, atomic_read(&export->exp_refcount));
796 GOTO(out, rc = -EBUSY);
797 } else if (req->rq_export != NULL &&
798 (atomic_read(&export->exp_rpc_count) > 1)) {
799 /* the current connect rpc has increased exp_rpc_count */
800 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
801 target->obd_name, cluuid.uuid,
802 libcfs_nid2str(req->rq_peer.nid),
803 export, atomic_read(&export->exp_rpc_count) - 1);
804 spin_lock(&export->exp_lock);
805 if (req->rq_export->exp_conn_cnt <
806 lustre_msg_get_conn_cnt(req->rq_reqmsg))
807 /* try to abort active requests */
808 req->rq_export->exp_abort_active_req = 1;
809 spin_unlock(&export->exp_lock);
810 GOTO(out, rc = -EBUSY);
811 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
812 CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; "
813 "cookies not random?\n", target->obd_name,
814 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid);
815 GOTO(out, rc = -EALREADY);
817 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
824 CWARN("%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
825 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
826 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
827 export, (long)cfs_time_current_sec(),
828 export ? (long)export->exp_last_request_time : 0);
830 /* Tell the client if we're in recovery. */
831 if (target->obd_recovering) {
832 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
833 /* If this is the first time a client connects,
834 reset the recovery timer */
836 target_start_and_reset_recovery_timer(target, req,
840 /* We want to handle EALREADY but *not* -EALREADY from
841 * target_handle_reconnect(), return reconnection state in a flag */
842 if (rc == EALREADY) {
843 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
849 /* Tell the client if we support replayable requests */
850 if (target->obd_replayable)
851 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
852 client_nid = &req->rq_peer.nid;
854 if (export == NULL) {
855 if (target->obd_recovering) {
858 t = cfs_timer_deadline(&target->obd_recovery_timer);
859 t = cfs_time_sub(t, cfs_time_current());
860 CERROR("%s: denying connection for new client %s (%s): "
861 "%d clients in recovery for "CFS_TIME_T"s\n",
863 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid,
864 atomic_read(&target->obd_lock_replay_clients),
865 cfs_duration_sec(t));
869 rc = obd_connect(req->rq_svc_thread->t_env,
870 &export, target, &cluuid, data,
873 conn.cookie = export->exp_handle.h_cookie;
876 rc = obd_reconnect(req->rq_svc_thread->t_env,
877 export, target, &cluuid, data, client_nid);
879 /* prevous done via class_conn2export */
880 class_export_get(export);
884 /* Return only the parts of obd_connect_data that we understand, so the
885 * client knows that we don't understand the rest. */
887 tmpdata = req_capsule_server_get(&req->rq_pill,
889 //data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED;
893 /* If all else goes well, this is our RPC return code. */
896 lustre_msg_set_handle(req->rq_repmsg, &conn);
898 /* If the client and the server are the same node, we will already
899 * have an export that really points to the client's DLM export,
900 * because we have a shared handles table.
902 * XXX this will go away when shaver stops sending the "connect" handle
903 * in the real "remote handle" field of the request --phik 24 Apr 2003
905 if (req->rq_export != NULL)
906 class_export_put(req->rq_export);
908 req->rq_export = export;
910 spin_lock(&export->exp_lock);
911 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
912 spin_unlock(&export->exp_lock);
913 CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n",
914 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
915 export->exp_conn_cnt,
916 lustre_msg_get_conn_cnt(req->rq_reqmsg));
918 GOTO(out, rc = -EALREADY);
920 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
921 export->exp_abort_active_req = 0;
923 /* request from liblustre? Don't evict it for not pinging. */
924 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
925 export->exp_libclient = 1;
926 spin_unlock(&export->exp_lock);
928 spin_lock(&target->obd_dev_lock);
929 list_del_init(&export->exp_obd_chain_timed);
930 spin_unlock(&target->obd_dev_lock);
932 spin_unlock(&export->exp_lock);
935 if (export->exp_connection != NULL) {
936 /* Check to see if connection came from another NID */
937 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
938 !hlist_unhashed(&export->exp_nid_hash))
939 lustre_hash_del(export->exp_obd->obd_nid_hash,
940 &export->exp_connection->c_peer.nid,
941 &export->exp_nid_hash);
943 ptlrpc_connection_put(export->exp_connection);
946 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
949 if (hlist_unhashed(&export->exp_nid_hash)) {
950 lustre_hash_add_unique(export->exp_obd->obd_nid_hash,
951 &export->exp_connection->c_peer.nid,
952 &export->exp_nid_hash);
955 spin_lock_bh(&target->obd_processing_task_lock);
956 if (target->obd_recovering && !export->exp_in_recovery) {
957 spin_lock(&export->exp_lock);
958 export->exp_in_recovery = 1;
959 export->exp_req_replay_needed = 1;
960 export->exp_lock_replay_needed = 1;
961 spin_unlock(&export->exp_lock);
962 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
963 && (data->ocd_transno == 0))
964 CWARN("Connect with zero transno!\n");
966 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
967 && data->ocd_transno < target->obd_next_recovery_transno)
968 target->obd_next_recovery_transno = data->ocd_transno;
969 target->obd_connected_clients++;
970 atomic_inc(&target->obd_req_replay_clients);
971 atomic_inc(&target->obd_lock_replay_clients);
972 if (target->obd_connected_clients ==
973 target->obd_max_recoverable_clients)
974 cfs_waitq_signal(&target->obd_next_transno_waitq);
976 spin_unlock_bh(&target->obd_processing_task_lock);
977 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
980 if (export->exp_imp_reverse != NULL) {
981 /* destroyed import can be still referenced in ctxt */
982 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
983 KEY_REVIMP_UPD, 0, NULL, NULL);
985 client_destroy_import(export->exp_imp_reverse);
988 /* for the rest part, we return -ENOTCONN in case of errors
989 * in order to let client initialize connection again.
991 revimp = export->exp_imp_reverse = class_new_import(target);
993 CERROR("fail to alloc new reverse import.\n");
994 GOTO(out, rc = -ENOTCONN);
997 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
998 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
999 revimp->imp_remote_handle = conn;
1000 revimp->imp_dlm_fake = 1;
1001 revimp->imp_state = LUSTRE_IMP_FULL;
1003 /* unknown versions will be caught in
1004 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
1005 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1007 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
1008 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1009 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1011 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1013 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1015 CERROR("Failed to get sec for reverse import: %d\n", rc);
1016 export->exp_imp_reverse = NULL;
1017 class_destroy_import(revimp);
1020 class_import_put(revimp);
1023 spin_lock(&export->exp_lock);
1024 export->exp_connecting = 0;
1025 spin_unlock(&export->exp_lock);
1028 class_decref(targref, __FUNCTION__, cfs_current());
1030 req->rq_status = rc;
1034 int target_handle_disconnect(struct ptlrpc_request *req)
1039 rc = req_capsule_server_pack(&req->rq_pill);
1043 /* keep the rq_export around so we can send the reply */
1044 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1049 void target_destroy_export(struct obd_export *exp)
1051 /* exports created from last_rcvd data, and "fake"
1052 exports created by lctl don't have an import */
1053 if (exp->exp_imp_reverse != NULL)
1054 client_destroy_import(exp->exp_imp_reverse);
1056 LASSERT(atomic_read(&exp->exp_locks_count) == 0);
1057 LASSERT(atomic_read(&exp->exp_rpc_count) == 0);
1058 LASSERT(atomic_read(&exp->exp_cb_count) == 0);
1059 LASSERT(atomic_read(&exp->exp_replay_count) == 0);
1063 * Recovery functions
1066 struct ptlrpc_request *ptlrpc_clone_req( struct ptlrpc_request *orig_req)
1068 struct ptlrpc_request *copy_req;
1069 struct lustre_msg *copy_reqmsg;
1070 struct ptlrpc_user_desc *udesc = NULL;
1072 OBD_ALLOC_PTR(copy_req);
1075 OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
1077 OBD_FREE_PTR(copy_req);
1081 if (orig_req->rq_user_desc) {
1082 int ngroups = orig_req->rq_user_desc->pud_ngroups;
1084 OBD_ALLOC(udesc, sptlrpc_user_desc_size(ngroups));
1086 OBD_FREE(copy_reqmsg, orig_req->rq_reqlen);
1087 OBD_FREE_PTR(copy_req);
1090 memcpy(udesc, orig_req->rq_user_desc,
1091 sptlrpc_user_desc_size(ngroups));
1094 *copy_req = *orig_req;
1095 memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
1096 copy_req->rq_reqmsg = copy_reqmsg;
1097 copy_req->rq_user_desc = udesc;
1099 class_export_rpc_get(copy_req->rq_export);
1100 CFS_INIT_LIST_HEAD(©_req->rq_list);
1101 CFS_INIT_LIST_HEAD(©_req->rq_replay_list);
1102 sptlrpc_svc_ctx_addref(copy_req);
1104 if (copy_req->rq_reply_state) {
1105 /* the copied req takes over the reply state */
1106 orig_req->rq_reply_state = NULL;
1107 /* to catch further access */
1108 orig_req->rq_repmsg = NULL;
1109 orig_req->rq_replen = 0;
1111 /** let export know it has replays to be handled */
1112 atomic_inc(©_req->rq_export->exp_replay_count);
1116 void ptlrpc_free_clone(struct ptlrpc_request *req)
1118 LASSERT(list_empty(&req->rq_replay_list));
1120 ptlrpc_req_drop_rs(req);
1121 sptlrpc_svc_ctx_decref(req);
1122 LASSERT(atomic_read(&req->rq_export->exp_replay_count) > 0);
1123 atomic_dec(&req->rq_export->exp_replay_count);
1124 class_export_rpc_put(req->rq_export);
1125 list_del_init(&req->rq_list);
1127 if (req->rq_user_desc) {
1128 int ngroups = req->rq_user_desc->pud_ngroups;
1129 OBD_FREE(req->rq_user_desc, sptlrpc_user_desc_size(ngroups));
1131 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
1135 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1137 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1138 struct obd_export *exp = req->rq_export;
1139 struct ptlrpc_request *reqiter;
1144 spin_lock(&exp->exp_lock);
1145 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1147 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1154 /* we expect it with RESENT and REPLAY flags */
1155 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1156 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1157 CERROR("invalid flags %x of resent replay\n",
1158 lustre_msg_get_flags(req->rq_reqmsg));
1160 list_add_tail(&req->rq_replay_list, &exp->exp_req_replay_queue);
1163 spin_unlock(&exp->exp_lock);
1167 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1169 LASSERT(!list_empty(&req->rq_replay_list));
1170 LASSERT(req->rq_export);
1172 spin_lock(&req->rq_export->exp_lock);
1173 list_del_init(&req->rq_replay_list);
1174 spin_unlock(&req->rq_export->exp_lock);
1178 static void target_finish_recovery(struct obd_device *obd)
1181 LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n",
1184 ldlm_reprocess_all_ns(obd->obd_namespace);
1185 spin_lock_bh(&obd->obd_processing_task_lock);
1186 if (!list_empty(&obd->obd_req_replay_queue) ||
1187 !list_empty(&obd->obd_lock_replay_queue) ||
1188 !list_empty(&obd->obd_final_req_queue)) {
1189 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1191 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1192 list_empty(&obd->obd_lock_replay_queue) ? "" : "lock ",
1193 list_empty(&obd->obd_final_req_queue) ? "" : "final ");
1194 spin_unlock_bh(&obd->obd_processing_task_lock);
1197 spin_unlock_bh(&obd->obd_processing_task_lock);
1199 obd->obd_recovery_end = cfs_time_current_sec();
1201 /* when recovery finished, cleanup orphans on mds and ost */
1202 if (OBT(obd) && OBP(obd, postrecov)) {
1203 int rc = OBP(obd, postrecov)(obd);
1205 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1211 static void abort_req_replay_queue(struct obd_device *obd)
1213 struct ptlrpc_request *req, *n;
1214 struct list_head abort_list;
1216 CFS_INIT_LIST_HEAD(&abort_list);
1217 spin_lock_bh(&obd->obd_processing_task_lock);
1218 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1219 spin_unlock_bh(&obd->obd_processing_task_lock);
1220 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1221 DEBUG_REQ(D_WARNING, req, "aborted:");
1222 req->rq_status = -ENOTCONN;
1223 if (ptlrpc_error(req)) {
1224 DEBUG_REQ(D_ERROR, req,
1225 "failed abort_req_reply; skipping");
1227 target_exp_dequeue_req_replay(req);
1228 ptlrpc_free_clone(req);
1232 static void abort_lock_replay_queue(struct obd_device *obd)
1234 struct ptlrpc_request *req, *n;
1235 struct list_head abort_list;
1237 CFS_INIT_LIST_HEAD(&abort_list);
1238 spin_lock_bh(&obd->obd_processing_task_lock);
1239 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1240 spin_unlock_bh(&obd->obd_processing_task_lock);
1241 list_for_each_entry_safe(req, n, &abort_list, rq_list){
1242 DEBUG_REQ(D_ERROR, req, "aborted:");
1243 req->rq_status = -ENOTCONN;
1244 if (ptlrpc_error(req)) {
1245 DEBUG_REQ(D_ERROR, req,
1246 "failed abort_lock_reply; skipping");
1248 ptlrpc_free_clone(req);
1253 /* Called from a cleanup function if the device is being cleaned up
1254 forcefully. The exports should all have been disconnected already,
1255 the only thing left to do is
1256 - clear the recovery flags
1258 - free queued requests and replies, but don't send replies
1259 Because the obd_stopping flag is set, no new requests should be received.
1262 void target_cleanup_recovery(struct obd_device *obd)
1264 struct ptlrpc_request *req, *n;
1265 struct list_head clean_list;
1268 LASSERT(obd->obd_stopping);
1270 CFS_INIT_LIST_HEAD(&clean_list);
1271 spin_lock_bh(&obd->obd_processing_task_lock);
1272 if (!obd->obd_recovering) {
1273 spin_unlock_bh(&obd->obd_processing_task_lock);
1277 obd->obd_recovering = obd->obd_abort_recovery = 0;
1278 target_cancel_recovery_timer(obd);
1280 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1281 spin_unlock_bh(&obd->obd_processing_task_lock);
1283 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1284 LASSERT(req->rq_reply_state == 0);
1285 target_exp_dequeue_req_replay(req);
1286 ptlrpc_free_clone(req);
1289 spin_lock_bh(&obd->obd_processing_task_lock);
1290 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1291 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1292 spin_unlock_bh(&obd->obd_processing_task_lock);
1294 list_for_each_entry_safe(req, n, &clean_list, rq_list){
1295 LASSERT(req->rq_reply_state == 0);
1296 ptlrpc_free_clone(req);
1302 /* obd_processing_task_lock should be held */
1303 void target_cancel_recovery_timer(struct obd_device *obd)
1305 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1306 cfs_timer_disarm(&obd->obd_recovery_timer);
1309 /* extend = 1 means require at least "duration" seconds left in the timer,
1310 extend = 0 means set the total duration (start_recovery_timer) */
1311 static void reset_recovery_timer(struct obd_device *obd, int duration,
1314 cfs_time_t now = cfs_time_current_sec();
1315 cfs_duration_t left;
1317 spin_lock_bh(&obd->obd_processing_task_lock);
1318 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1319 spin_unlock_bh(&obd->obd_processing_task_lock);
1323 left = cfs_time_sub(obd->obd_recovery_end, now);
1325 if (extend && (duration > left))
1326 obd->obd_recovery_timeout += duration - left;
1327 else if (!extend && (duration > obd->obd_recovery_timeout))
1328 /* Track the client's largest expected replay time */
1329 obd->obd_recovery_timeout = duration;
1332 * If total recovery time already exceed the
1333 * obd_recovery_max_time, then CRAY XT3 will
1334 * abort the recovery
1336 if(obd->obd_recovery_timeout > obd->obd_recovery_max_time)
1337 obd->obd_recovery_timeout = obd->obd_recovery_max_time;
1339 obd->obd_recovery_end = obd->obd_recovery_start +
1340 obd->obd_recovery_timeout;
1341 if (!cfs_timer_is_armed(&obd->obd_recovery_timer) ||
1342 cfs_time_before(now, obd->obd_recovery_end)) {
1343 left = cfs_time_sub(obd->obd_recovery_end, now);
1344 cfs_timer_arm(&obd->obd_recovery_timer, cfs_time_shift(left));
1346 spin_unlock_bh(&obd->obd_processing_task_lock);
1347 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1348 obd->obd_name, (unsigned)left);
1351 static void check_and_start_recovery_timer(struct obd_device *obd)
1353 spin_lock_bh(&obd->obd_processing_task_lock);
1354 if (cfs_timer_is_armed(&obd->obd_recovery_timer)) {
1355 spin_unlock_bh(&obd->obd_processing_task_lock);
1358 CDEBUG(D_HA, "%s: starting recovery timer\n", obd->obd_name);
1359 obd->obd_recovery_start = cfs_time_current_sec();
1361 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1362 spin_unlock_bh(&obd->obd_processing_task_lock);
1364 reset_recovery_timer(obd, obd->obd_recovery_timeout, 0);
1367 /* Reset the timer with each new client connection */
1369 * This timer is actually reconnect_timer, which is for making sure
1370 * the total recovery window is at least as big as my reconnect
1371 * attempt timing. So the initial recovery time_out will be set to
1372 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1373 * from client is bigger than this, then the recovery time_out will
1374 * be extend to make sure the client could be reconnected, in the
1375 * process, the timeout from the new client should be ignored.
1379 target_start_and_reset_recovery_timer(struct obd_device *obd,
1380 struct ptlrpc_request *req,
1383 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1385 if (!new_client && service_time)
1386 /* Teach server about old server's estimates, as first guess
1387 * at how long new requests will take. */
1388 at_add(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1391 check_and_start_recovery_timer(obd);
1393 /* convert the service time to rpc timeout,
1394 * reuse service_time to limit stack usage */
1395 service_time = at_est2timeout(service_time);
1397 /* We expect other clients to timeout within service_time, then try
1398 * to reconnect, then try the failover server. The max delay between
1399 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */
1400 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC +
1401 INITIAL_CONNECT_TIMEOUT);
1402 if (service_time > obd->obd_recovery_timeout && !new_client)
1403 reset_recovery_timer(obd, service_time, 0);
1408 /** Health checking routines */
1409 static inline int exp_connect_healthy(struct obd_export *exp)
1411 return (exp->exp_in_recovery);
1414 /** if export done req_replay or has replay in queue */
1415 static inline int exp_req_replay_healthy(struct obd_export *exp)
1417 return (!exp->exp_req_replay_needed ||
1418 atomic_read(&exp->exp_replay_count) > 0);
1420 /** if export done lock_replay or has replay in queue */
1421 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1423 return (!exp->exp_lock_replay_needed ||
1424 atomic_read(&exp->exp_replay_count) > 0);
1427 static inline int exp_vbr_healthy(struct obd_export *exp)
1429 return (!exp->exp_vbr_failed);
1432 static inline int exp_finished(struct obd_export *exp)
1434 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1437 /** Checking routines for recovery */
1438 static int check_for_clients(struct obd_device *obd)
1440 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1442 LASSERT(obd->obd_connected_clients <= obd->obd_max_recoverable_clients);
1443 if (obd->obd_no_conn == 0 &&
1444 obd->obd_connected_clients + obd->obd_stale_clients ==
1445 obd->obd_max_recoverable_clients)
1450 static int check_for_next_transno(struct obd_device *obd)
1452 struct ptlrpc_request *req = NULL;
1453 int wake_up = 0, connected, completed, queue_len;
1454 __u64 next_transno, req_transno;
1456 spin_lock_bh(&obd->obd_processing_task_lock);
1458 if (!list_empty(&obd->obd_req_replay_queue)) {
1459 req = list_entry(obd->obd_req_replay_queue.next,
1460 struct ptlrpc_request, rq_list);
1461 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1466 connected = obd->obd_connected_clients;
1467 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1468 queue_len = obd->obd_requests_queued_for_recovery;
1469 next_transno = obd->obd_next_recovery_transno;
1471 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1472 "req_transno: "LPU64", next_transno: "LPU64"\n",
1473 obd->obd_max_recoverable_clients, connected, completed,
1474 queue_len, req_transno, next_transno);
1476 if (obd->obd_abort_recovery) {
1477 CDEBUG(D_HA, "waking for aborted recovery\n");
1479 } else if (obd->obd_recovery_expired) {
1480 CDEBUG(D_HA, "waking for expired recovery\n");
1482 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1483 CDEBUG(D_HA, "waking for completed recovery\n");
1485 } else if (req_transno == next_transno) {
1486 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1488 } else if (queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1490 /** handle gaps occured due to lost reply or VBR */
1491 LASSERTF(req_transno >= next_transno,
1492 "req_transno: "LPU64", next_transno: "LPU64"\n",
1493 req_transno, next_transno);
1494 if (req_transno > obd->obd_last_committed &&
1495 !obd->obd_version_recov)
1498 "%s: waking for gap in transno, VBR is %s (skip: "
1499 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1500 ", last_committed: "LPD64")\n",
1501 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1502 next_transno, queue_len, completed, connected,
1503 req_transno, obd->obd_last_committed);
1504 obd->obd_next_recovery_transno = req_transno;
1506 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1507 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1508 " by fail_lock, waking up ("LPD64")\n", next_transno);
1509 obd->obd_next_recovery_transno = req_transno;
1512 spin_unlock_bh(&obd->obd_processing_task_lock);
1516 static int check_for_next_lock(struct obd_device *obd)
1520 spin_lock_bh(&obd->obd_processing_task_lock);
1521 if (!list_empty(&obd->obd_lock_replay_queue)) {
1522 CDEBUG(D_HA, "waking for next lock\n");
1524 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1525 CDEBUG(D_HA, "waking for completed lock replay\n");
1527 } else if (obd->obd_abort_recovery) {
1528 CDEBUG(D_HA, "waking for aborted recovery\n");
1530 } else if (obd->obd_recovery_expired) {
1531 CDEBUG(D_HA, "waking for expired recovery\n");
1534 spin_unlock_bh(&obd->obd_processing_task_lock);
1540 * wait for recovery events,
1541 * check its status with help of check_routine
1542 * evict dead clients via health_check
1544 static int target_recovery_overseer(struct obd_device *obd,
1545 int (*check_routine)(struct obd_device *),
1546 int (*health_check)(struct obd_export *))
1548 int abort = 0, expired = 1;
1551 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1552 spin_lock_bh(&obd->obd_processing_task_lock);
1553 abort = obd->obd_abort_recovery;
1554 expired = obd->obd_recovery_expired;
1555 obd->obd_recovery_expired = 0;
1556 spin_unlock_bh(&obd->obd_processing_task_lock);
1558 CWARN("recovery is aborted, evict exports in recovery\n");
1559 /** evict exports which didn't finish recovery yet */
1560 class_disconnect_stale_exports(obd, exp_finished);
1561 } else if (expired) {
1562 /** If some clients died being recovered, evict them */
1563 CDEBUG(D_WARNING, "recovery is timed out, evict stale exports\n");
1564 /** evict cexports with no replay in queue, they are stalled */
1565 class_disconnect_stale_exports(obd, health_check);
1566 /** continue with VBR */
1567 spin_lock_bh(&obd->obd_processing_task_lock);
1568 obd->obd_version_recov = 1;
1569 spin_unlock_bh(&obd->obd_processing_task_lock);
1571 * reset timer, recovery will proceed with versions now,
1572 * timeout is set just to handle reconnection delays
1574 reset_recovery_timer(obd, RECONNECT_DELAY_MAX, 1);
1575 /** Wait for recovery events again, after evicting bad clients */
1577 } while (!abort && expired);
1582 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1584 struct ptlrpc_request *req = NULL;
1587 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1588 obd->obd_next_recovery_transno);
1590 if (target_recovery_overseer(obd, check_for_next_transno,
1591 exp_req_replay_healthy)) {
1592 abort_req_replay_queue(obd);
1593 abort_lock_replay_queue(obd);
1596 spin_lock_bh(&obd->obd_processing_task_lock);
1597 if (!list_empty(&obd->obd_req_replay_queue)) {
1598 req = list_entry(obd->obd_req_replay_queue.next,
1599 struct ptlrpc_request, rq_list);
1600 list_del_init(&req->rq_list);
1601 obd->obd_requests_queued_for_recovery--;
1602 spin_unlock_bh(&obd->obd_processing_task_lock);
1604 spin_unlock_bh(&obd->obd_processing_task_lock);
1605 LASSERT(list_empty(&obd->obd_req_replay_queue));
1606 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
1607 /** evict exports failed VBR */
1608 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1613 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1615 struct ptlrpc_request *req = NULL;
1617 CDEBUG(D_HA, "Waiting for lock\n");
1618 if (target_recovery_overseer(obd, check_for_next_lock,
1619 exp_lock_replay_healthy))
1620 abort_lock_replay_queue(obd);
1622 spin_lock_bh(&obd->obd_processing_task_lock);
1623 if (!list_empty(&obd->obd_lock_replay_queue)) {
1624 req = list_entry(obd->obd_lock_replay_queue.next,
1625 struct ptlrpc_request, rq_list);
1626 list_del_init(&req->rq_list);
1627 spin_unlock_bh(&obd->obd_processing_task_lock);
1629 spin_unlock_bh(&obd->obd_processing_task_lock);
1630 LASSERT(list_empty(&obd->obd_lock_replay_queue));
1631 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
1632 /** evict exports failed VBR */
1633 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1638 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1640 struct ptlrpc_request *req = NULL;
1642 spin_lock_bh(&obd->obd_processing_task_lock);
1643 if (!list_empty(&obd->obd_final_req_queue)) {
1644 req = list_entry(obd->obd_final_req_queue.next,
1645 struct ptlrpc_request, rq_list);
1646 list_del_init(&req->rq_list);
1647 if (req->rq_export->exp_in_recovery) {
1648 spin_lock(&req->rq_export->exp_lock);
1649 req->rq_export->exp_in_recovery = 0;
1650 spin_unlock(&req->rq_export->exp_lock);
1653 spin_unlock_bh(&obd->obd_processing_task_lock);
1657 static int handle_recovery_req(struct ptlrpc_thread *thread,
1658 struct ptlrpc_request *req,
1659 svc_handler_t handler)
1664 rc = lu_context_init(&req->rq_session, LCT_SESSION);
1666 CERROR("Failure to initialize session: %d\n", rc);
1667 GOTO(free_clone, rc);
1670 * export can be evicted during recovery, no need to handle replays for
1671 * it after that, discard such request silently
1673 if (req->rq_export->exp_disconnected)
1674 GOTO(free_clone, rc);
1676 req->rq_session.lc_thread = thread;
1677 lu_context_enter(&req->rq_session);
1678 req->rq_svc_thread = thread;
1679 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
1681 /* thread context */
1682 lu_context_enter(&thread->t_env->le_ctx);
1684 lu_context_exit(&thread->t_env->le_ctx);
1686 lu_context_exit(&req->rq_session);
1687 lu_context_fini(&req->rq_session);
1688 /* don't reset timer for final stage */
1689 if (!exp_finished(req->rq_export)) {
1691 * XXX: until bug 18948 is fixed (enable AT for request copy)
1692 * the client may reconnect during recovery so we may need to
1693 * wait RECONNECT_DELAY_MAX after each replay instead of
1694 * at_get(&req->rq_rqbd->rqbd_service->srv_at_estimate);
1696 reset_recovery_timer(class_exp2obd(req->rq_export), AT_OFF ?
1697 obd_timeout : RECONNECT_DELAY_MAX, 1);
1700 * bz18031: increase next_recovery_transno before ptlrpc_free_clone()
1701 * will drop exp_rpc reference
1703 if (req->rq_export->exp_req_replay_needed) {
1704 spin_lock_bh(&req->rq_export->exp_obd->obd_processing_task_lock);
1705 req->rq_export->exp_obd->obd_next_recovery_transno++;
1706 spin_unlock_bh(&req->rq_export->exp_obd->obd_processing_task_lock);
1707 target_exp_dequeue_req_replay(req);
1710 ptlrpc_free_clone(req);
1714 static int target_recovery_thread(void *arg)
1716 struct lu_target *lut = arg;
1717 struct obd_device *obd = lut->lut_obd;
1718 struct ptlrpc_request *req;
1719 struct target_recovery_data *trd = &obd->obd_recovery_data;
1720 unsigned long delta;
1721 unsigned long flags;
1723 struct ptlrpc_thread fake_svc_thread, *thread = &fake_svc_thread;
1727 cfs_daemonize("tgt_recov");
1729 SIGNAL_MASK_LOCK(current, flags);
1730 sigfillset(¤t->blocked);
1732 SIGNAL_MASK_UNLOCK(current, flags);
1734 rc = lu_context_init(&env.le_ctx, LCT_MD_THREAD);
1738 thread->t_env = &env;
1739 env.le_ctx.lc_thread = thread;
1741 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
1743 trd->trd_processing_task = cfs_curproc_pid();
1745 obd->obd_recovering = 1;
1746 complete(&trd->trd_starting);
1748 /* first of all, we have to know the first transno to replay */
1749 if (target_recovery_overseer(obd, check_for_clients,
1750 exp_connect_healthy)) {
1751 abort_req_replay_queue(obd);
1752 abort_lock_replay_queue(obd);
1755 /* next stage: replay requests */
1757 obd->obd_req_replaying = 1;
1758 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1759 atomic_read(&obd->obd_req_replay_clients),
1760 obd->obd_next_recovery_transno);
1761 while ((req = target_next_replay_req(obd))) {
1762 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1763 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1764 lustre_msg_get_transno(req->rq_reqmsg),
1765 libcfs_nid2str(req->rq_peer.nid));
1766 handle_recovery_req(thread, req,
1767 trd->trd_recovery_handler);
1768 obd->obd_replayed_requests++;
1772 * The second stage: replay locks
1774 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1775 atomic_read(&obd->obd_lock_replay_clients));
1776 while ((req = target_next_replay_lock(obd))) {
1777 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1778 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
1779 libcfs_nid2str(req->rq_peer.nid));
1780 handle_recovery_req(thread, req,
1781 trd->trd_recovery_handler);
1782 obd->obd_replayed_locks++;
1786 * The third stage: reply on final pings, at this moment all clients
1787 * must have request in final queue
1789 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1790 /** Update server last boot epoch */
1791 lut_boot_epoch_update(lut);
1792 /* We drop recoverying flag to forward all new requests
1793 * to regular mds_handle() since now */
1794 spin_lock_bh(&obd->obd_processing_task_lock);
1795 obd->obd_recovering = obd->obd_abort_recovery = 0;
1796 target_cancel_recovery_timer(obd);
1797 spin_unlock_bh(&obd->obd_processing_task_lock);
1798 while ((req = target_next_final_ping(obd))) {
1799 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1800 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1801 libcfs_nid2str(req->rq_peer.nid));
1802 handle_recovery_req(thread, req,
1803 trd->trd_recovery_handler);
1806 delta = (jiffies - delta) / HZ;
1807 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1808 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1809 if (delta > obd_timeout * OBD_RECOVERY_FACTOR) {
1810 CWARN("too long recovery - read logs\n");
1811 libcfs_debug_dumplog();
1814 target_finish_recovery(obd);
1816 lu_context_fini(&env.le_ctx);
1817 trd->trd_processing_task = 0;
1818 complete(&trd->trd_finishing);
1822 static int target_start_recovery_thread(struct lu_target *lut,
1823 svc_handler_t handler)
1825 struct obd_device *obd = lut->lut_obd;
1827 struct target_recovery_data *trd = &obd->obd_recovery_data;
1829 memset(trd, 0, sizeof(*trd));
1830 init_completion(&trd->trd_starting);
1831 init_completion(&trd->trd_finishing);
1832 trd->trd_recovery_handler = handler;
1834 if (kernel_thread(target_recovery_thread, lut, 0) > 0) {
1835 wait_for_completion(&trd->trd_starting);
1836 LASSERT(obd->obd_recovering != 0);
1843 void target_stop_recovery_thread(struct obd_device *obd)
1845 spin_lock_bh(&obd->obd_processing_task_lock);
1846 if (obd->obd_recovery_data.trd_processing_task > 0) {
1847 struct target_recovery_data *trd = &obd->obd_recovery_data;
1848 /** recovery can be done but postrecovery is not yet */
1849 if (obd->obd_recovering) {
1850 CERROR("%s: Aborting recovery\n", obd->obd_name);
1851 obd->obd_abort_recovery = 1;
1852 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1854 spin_unlock_bh(&obd->obd_processing_task_lock);
1855 wait_for_completion(&trd->trd_finishing);
1857 spin_unlock_bh(&obd->obd_processing_task_lock);
1861 void target_recovery_fini(struct obd_device *obd)
1863 class_disconnect_exports(obd);
1864 target_stop_recovery_thread(obd);
1865 target_cleanup_recovery(obd);
1867 EXPORT_SYMBOL(target_recovery_fini);
1869 static void target_recovery_expired(unsigned long castmeharder)
1871 struct obd_device *obd = (struct obd_device *)castmeharder;
1872 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
1873 " after %lds (%d clients connected)\n",
1874 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
1875 cfs_time_current_sec()- obd->obd_recovery_start,
1876 obd->obd_connected_clients);
1878 spin_lock_bh(&obd->obd_processing_task_lock);
1879 obd->obd_recovery_expired = 1;
1880 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1881 spin_unlock_bh(&obd->obd_processing_task_lock);
1884 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
1886 struct obd_device *obd = lut->lut_obd;
1887 if (obd->obd_max_recoverable_clients == 0) {
1888 /** Update server last boot epoch */
1889 lut_boot_epoch_update(lut);
1893 CWARN("RECOVERY: service %s, %d recoverable clients, "
1894 "last_transno "LPU64"\n", obd->obd_name,
1895 obd->obd_max_recoverable_clients, obd->obd_last_committed);
1896 LASSERT(obd->obd_stopping == 0);
1897 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
1898 obd->obd_recovery_start = 0;
1899 obd->obd_recovery_end = 0;
1900 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1901 /* bz13079: this should be set to desired value for ost but not for mds */
1902 obd->obd_recovery_max_time = OBD_RECOVERY_MAX_TIME;
1903 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
1904 target_start_recovery_thread(lut, handler);
1906 EXPORT_SYMBOL(target_recovery_init);
1910 static int target_process_req_flags(struct obd_device *obd,
1911 struct ptlrpc_request *req)
1913 struct obd_export *exp = req->rq_export;
1914 LASSERT(exp != NULL);
1915 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1916 /* client declares he's ready to replay locks */
1917 spin_lock_bh(&obd->obd_processing_task_lock);
1918 if (exp->exp_req_replay_needed) {
1919 LASSERT(atomic_read(&obd->obd_req_replay_clients) > 0);
1920 spin_lock(&exp->exp_lock);
1921 exp->exp_req_replay_needed = 0;
1922 spin_unlock(&exp->exp_lock);
1923 atomic_dec(&obd->obd_req_replay_clients);
1925 spin_unlock_bh(&obd->obd_processing_task_lock);
1927 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1928 /* client declares he's ready to complete recovery
1929 * so, we put the request on th final queue */
1930 spin_lock_bh(&obd->obd_processing_task_lock);
1931 if (exp->exp_lock_replay_needed) {
1932 LASSERT(atomic_read(&obd->obd_lock_replay_clients) > 0);
1933 spin_lock(&exp->exp_lock);
1934 exp->exp_lock_replay_needed = 0;
1935 spin_unlock(&exp->exp_lock);
1936 atomic_dec(&obd->obd_lock_replay_clients);
1938 spin_unlock_bh(&obd->obd_processing_task_lock);
1944 int target_queue_recovery_request(struct ptlrpc_request *req,
1945 struct obd_device *obd)
1947 struct list_head *tmp;
1949 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1952 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
1953 /* Processing the queue right now, don't re-add. */
1957 target_process_req_flags(obd, req);
1959 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1960 /* client declares he's ready to complete recovery
1961 * so, we put the request on th final queue */
1962 req = ptlrpc_clone_req(req);
1965 DEBUG_REQ(D_HA, req, "queue final req");
1966 spin_lock_bh(&obd->obd_processing_task_lock);
1967 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1968 if (obd->obd_recovering)
1969 list_add_tail(&req->rq_list, &obd->obd_final_req_queue);
1971 spin_unlock_bh(&obd->obd_processing_task_lock);
1972 ptlrpc_free_clone(req);
1973 if (obd->obd_stopping) {
1979 spin_unlock_bh(&obd->obd_processing_task_lock);
1982 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1983 /* client declares he's ready to replay locks */
1984 req = ptlrpc_clone_req(req);
1987 DEBUG_REQ(D_HA, req, "queue lock replay req");
1988 spin_lock_bh(&obd->obd_processing_task_lock);
1989 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1990 LASSERT(obd->obd_recovering);
1991 /* usually due to recovery abort */
1992 if (!req->rq_export->exp_in_recovery) {
1993 spin_unlock_bh(&obd->obd_processing_task_lock);
1994 ptlrpc_free_clone(req);
1997 LASSERT(req->rq_export->exp_lock_replay_needed);
1998 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
1999 spin_unlock_bh(&obd->obd_processing_task_lock);
2003 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2004 * (i.e. buflens etc are in my own byte order), but type-dependent
2005 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
2008 CFS_INIT_LIST_HEAD(&req->rq_list);
2009 DEBUG_REQ(D_HA, req, "not queueing");
2013 spin_lock_bh(&obd->obd_processing_task_lock);
2015 /* If we're processing the queue, we want don't want to queue this
2018 * Also, if this request has a transno less than the one we're waiting
2019 * for, we should process it now. It could (and currently always will)
2020 * be an open request for a descriptor that was opened some time ago.
2022 * Also, a resent, replayed request that has already been
2023 * handled will pass through here and be processed immediately.
2025 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying: %i\n",
2026 obd->obd_next_recovery_transno, transno, obd->obd_req_replaying);
2027 if (transno < obd->obd_next_recovery_transno && obd->obd_req_replaying) {
2028 /* Processing the queue right now, don't re-add. */
2029 LASSERT(list_empty(&req->rq_list));
2030 spin_unlock_bh(&obd->obd_processing_task_lock);
2033 spin_unlock_bh(&obd->obd_processing_task_lock);
2035 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2038 req = ptlrpc_clone_req(req);
2042 spin_lock_bh(&obd->obd_processing_task_lock);
2043 LASSERT(obd->obd_recovering);
2044 if (!req->rq_export->exp_in_recovery) {
2045 spin_unlock_bh(&obd->obd_processing_task_lock);
2046 ptlrpc_free_clone(req);
2049 LASSERT(req->rq_export->exp_req_replay_needed);
2051 if (target_exp_enqueue_req_replay(req)) {
2052 spin_unlock_bh(&obd->obd_processing_task_lock);
2053 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2054 ptlrpc_free_clone(req);
2059 list_for_each(tmp, &obd->obd_req_replay_queue) {
2060 struct ptlrpc_request *reqiter =
2061 list_entry(tmp, struct ptlrpc_request, rq_list);
2063 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2064 list_add_tail(&req->rq_list, &reqiter->rq_list);
2069 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2071 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2072 "has been claimed by another client");
2073 spin_unlock_bh(&obd->obd_processing_task_lock);
2074 target_exp_dequeue_req_replay(req);
2075 ptlrpc_free_clone(req);
2081 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2083 obd->obd_requests_queued_for_recovery++;
2084 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2085 spin_unlock_bh(&obd->obd_processing_task_lock);
2090 * Packs current SLV and Limit into \a req.
2092 int target_pack_pool_reply(struct ptlrpc_request *req)
2094 struct obd_device *obd;
2098 * Check that we still have all structures alive as this may
2099 * be some late rpc in shutdown time.
2101 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2102 !exp_connect_lru_resize(req->rq_export))) {
2103 lustre_msg_set_slv(req->rq_repmsg, 0);
2104 lustre_msg_set_limit(req->rq_repmsg, 0);
2109 * OBD is alive here as export is alive, which we checked above.
2111 obd = req->rq_export->exp_obd;
2113 read_lock(&obd->obd_pool_lock);
2114 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2115 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2116 read_unlock(&obd->obd_pool_lock);
2121 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2123 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2124 DEBUG_REQ(D_ERROR, req, "dropping reply");
2129 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
2130 req->rq_status = rc;
2131 return (ptlrpc_send_error(req, 1));
2133 DEBUG_REQ(D_NET, req, "sending reply");
2136 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2139 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2142 struct ptlrpc_reply_state *rs;
2143 struct obd_device *obd;
2144 struct obd_export *exp;
2145 struct ptlrpc_service *svc;
2148 if (req->rq_no_reply) {
2153 svc = req->rq_rqbd->rqbd_service;
2154 rs = req->rq_reply_state;
2155 if (rs == NULL || !rs->rs_difficult) {
2157 target_send_reply_msg (req, rc, fail_id);
2162 /* must be an export if locks saved */
2163 LASSERT (req->rq_export != NULL);
2164 /* req/reply consistent */
2165 LASSERT (rs->rs_service == svc);
2168 LASSERT (!rs->rs_scheduled);
2169 LASSERT (!rs->rs_scheduled_ever);
2170 LASSERT (!rs->rs_handled);
2171 LASSERT (!rs->rs_on_net);
2172 LASSERT (rs->rs_export == NULL);
2173 LASSERT (list_empty(&rs->rs_obd_list));
2174 LASSERT (list_empty(&rs->rs_exp_list));
2176 exp = class_export_get (req->rq_export);
2179 /* disable reply scheduling while I'm setting up */
2180 rs->rs_scheduled = 1;
2182 rs->rs_xid = req->rq_xid;
2183 rs->rs_transno = req->rq_transno;
2184 rs->rs_export = exp;
2185 rs->rs_opc = lustre_msg_get_opc(rs->rs_msg);
2187 spin_lock(&exp->exp_uncommitted_replies_lock);
2188 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2189 rs->rs_transno, exp->exp_last_committed);
2190 if (rs->rs_transno > exp->exp_last_committed) {
2191 /* not committed already */
2192 list_add_tail(&rs->rs_obd_list,
2193 &exp->exp_uncommitted_replies);
2195 spin_unlock (&exp->exp_uncommitted_replies_lock);
2197 spin_lock(&exp->exp_lock);
2198 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2199 spin_unlock(&exp->exp_lock);
2201 netrc = target_send_reply_msg (req, rc, fail_id);
2203 spin_lock(&svc->srv_lock);
2205 atomic_inc(&svc->srv_n_difficult_replies);
2208 /* error sending: reply is off the net. Also we need +1
2209 * reply ref until ptlrpc_handle_rs() is done
2210 * with the reply state (if the send was successful, there
2211 * would have been +1 ref for the net, which
2212 * reply_out_callback leaves alone) */
2214 ptlrpc_rs_addref(rs);
2215 atomic_inc (&svc->srv_outstanding_replies);
2218 spin_lock(&rs->rs_lock);
2219 if (rs->rs_transno <= exp->exp_last_committed ||
2220 (!rs->rs_on_net && !rs->rs_no_ack) ||
2221 list_empty(&rs->rs_exp_list) || /* completed already */
2222 list_empty(&rs->rs_obd_list)) {
2223 CDEBUG(D_HA, "Schedule reply immediately\n");
2224 ptlrpc_dispatch_difficult_reply(rs);
2226 list_add (&rs->rs_list, &svc->srv_active_replies);
2227 rs->rs_scheduled = 0; /* allow notifier to schedule */
2229 spin_unlock(&rs->rs_lock);
2230 spin_unlock(&svc->srv_lock);
2234 int target_handle_ping(struct ptlrpc_request *req)
2236 obd_ping(req->rq_export);
2237 return req_capsule_server_pack(&req->rq_pill);
2240 void target_committed_to_req(struct ptlrpc_request *req)
2242 struct obd_export *exp = req->rq_export;
2244 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2245 lustre_msg_set_last_committed(req->rq_repmsg,
2246 exp->exp_last_committed);
2248 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2249 "%d)", exp->exp_obd->obd_no_transno,
2250 req->rq_repmsg == NULL);
2252 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2253 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2255 EXPORT_SYMBOL(target_committed_to_req);
2257 int target_handle_qc_callback(struct ptlrpc_request *req)
2259 struct obd_quotactl *oqctl;
2260 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2262 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2263 if (oqctl == NULL) {
2264 CERROR("Can't unpack obd_quotactl\n");
2268 cli->cl_qchk_stat = oqctl->qc_stat;
2273 #ifdef HAVE_QUOTA_SUPPORT
2274 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2277 struct obd_device *obd = req->rq_export->exp_obd;
2278 struct obd_device *master_obd;
2279 struct obd_device_target *obt;
2280 struct lustre_quota_ctxt *qctxt;
2281 struct qunit_data *qdata = NULL;
2285 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2288 rc = req_capsule_server_pack(&req->rq_pill);
2290 CERROR("packing reply failed!: rc = %d\n", rc);
2294 LASSERT(req->rq_export);
2296 qdata = quota_get_qdata(req, QUOTA_REQUEST, QUOTA_EXPORT);
2297 if (IS_ERR(qdata)) {
2298 rc = PTR_ERR(qdata);
2299 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2300 req->rq_status = rc;
2304 /* we use the observer */
2305 if (!obd->obd_observer || !obd->obd_observer->obd_observer) {
2306 CERROR("Can't find the observer, it is recovering\n");
2307 req->rq_status = -EAGAIN;
2311 master_obd = obd->obd_observer->obd_observer;
2312 obt = &master_obd->u.obt;
2313 qctxt = &obt->obt_qctxt;
2315 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2316 /* quota_type has not been processed yet, return EAGAIN
2317 * until we know whether or not quotas are supposed to
2319 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2321 req->rq_status = -EAGAIN;
2325 down_read(&obt->obt_rwsem);
2326 if (qctxt->lqc_lqs_hash == NULL) {
2327 up_read(&obt->obt_rwsem);
2328 /* quota_type has not been processed yet, return EAGAIN
2329 * until we know whether or not quotas are supposed to
2331 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2333 req->rq_status = -EAGAIN;
2337 LASSERT(qctxt->lqc_handler);
2338 rc = qctxt->lqc_handler(master_obd, qdata,
2339 lustre_msg_get_opc(req->rq_reqmsg));
2340 up_read(&obt->obt_rwsem);
2341 if (rc && rc != -EDQUOT)
2342 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2343 "dqacq/dqrel failed! (rc:%d)\n", rc);
2344 req->rq_status = rc;
2346 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2348 CERROR("Can't pack qunit_data(rc: %d)\n", rc);
2352 /* Block the quota req. b=14840 */
2353 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2357 rc = ptlrpc_reply(req);
2361 #endif /* !__KERNEL__ */
2363 #endif /* HAVE_QUOTA_SUPPORT */
2365 /* Send a remote set_info_async.
2366 * This may go from client to server or server to client
2368 int target_set_info_rpc(struct obd_import *imp, int opcode,
2369 obd_count keylen, void *key,
2370 obd_count vallen, void *val,
2371 struct ptlrpc_request_set *set)
2373 struct ptlrpc_request *req;
2378 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
2382 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2383 RCL_CLIENT, keylen);
2384 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2385 RCL_CLIENT, vallen);
2386 rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, opcode);
2388 ptlrpc_request_free(req);
2392 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2393 memcpy(tmp, key, keylen);
2394 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
2395 memcpy(tmp, val, vallen);
2397 ptlrpc_request_set_replen(req);
2400 ptlrpc_set_add_req(set, req);
2401 ptlrpc_check_set(NULL, set);
2403 rc = ptlrpc_queue_wait(req);
2404 ptlrpc_req_finished(req);
2409 EXPORT_SYMBOL(target_set_info_rpc);
2412 ldlm_mode_t lck_compat_array[] = {
2413 [LCK_EX] LCK_COMPAT_EX,
2414 [LCK_PW] LCK_COMPAT_PW,
2415 [LCK_PR] LCK_COMPAT_PR,
2416 [LCK_CW] LCK_COMPAT_CW,
2417 [LCK_CR] LCK_COMPAT_CR,
2418 [LCK_NL] LCK_COMPAT_NL,
2419 [LCK_GROUP] LCK_COMPAT_GROUP,
2420 [LCK_COS] LCK_COMPAT_COS,
2424 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2425 * not escape to the user level.
2427 int ldlm_error2errno(ldlm_error_t error)
2435 case ELDLM_LOCK_CHANGED:
2438 case ELDLM_LOCK_ABORTED:
2441 case ELDLM_LOCK_REPLACED:
2444 case ELDLM_NO_LOCK_DATA:
2447 case ELDLM_NAMESPACE_EXISTS:
2450 case ELDLM_BAD_NAMESPACE:
2454 if (((int)error) < 0) /* cast to signed type */
2455 result = error; /* as ldlm_error_t can be unsigned */
2457 CERROR("Invalid DLM result code: %i\n", error);
2463 EXPORT_SYMBOL(ldlm_error2errno);
2466 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2468 ldlm_error_t ldlm_errno2error(int err_no)
2477 error = ELDLM_LOCK_CHANGED;
2480 error = ELDLM_LOCK_ABORTED;
2483 error = ELDLM_LOCK_REPLACED;
2486 error = ELDLM_NO_LOCK_DATA;
2489 error = ELDLM_NAMESPACE_EXISTS;
2492 error = ELDLM_BAD_NAMESPACE;
2499 EXPORT_SYMBOL(ldlm_errno2error);