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 item->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 static void 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_write_list);
281 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
282 client_obd_list_lock_init(&cli->cl_loi_list_lock);
283 cli->cl_r_in_flight = 0;
284 cli->cl_w_in_flight = 0;
286 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
287 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
288 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
289 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
290 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
291 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
292 cfs_waitq_init(&cli->cl_destroy_waitq);
293 atomic_set(&cli->cl_destroy_in_flight, 0);
294 #ifdef ENABLE_CHECKSUM
295 /* Turn on checksumming by default. */
296 cli->cl_checksum = 1;
298 * The supported checksum types will be worked out at connect time
299 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
302 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
304 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
306 /* This value may be changed at connect time in
307 ptlrpc_connect_interpret. */
308 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
309 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
311 if (!strcmp(name, LUSTRE_MDC_NAME)) {
312 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
313 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
314 cli->cl_max_rpcs_in_flight = 2;
315 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
316 cli->cl_max_rpcs_in_flight = 3;
317 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
318 cli->cl_max_rpcs_in_flight = 4;
320 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
325 CERROR("ldlm_get_ref failed: %d\n", rc);
329 ptlrpc_init_client(rq_portal, rp_portal, name,
330 &obddev->obd_ldlm_client);
332 imp = class_new_import(obddev);
334 GOTO(err_ldlm, rc = -ENOENT);
335 imp->imp_client = &obddev->obd_ldlm_client;
336 imp->imp_connect_op = connect_op;
337 imp->imp_initial_recov = 1;
338 imp->imp_initial_recov_bk = 0;
339 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
340 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
341 LUSTRE_CFG_BUFLEN(lcfg, 1));
342 class_import_put(imp);
344 rc = client_import_add_conn(imp, &server_uuid, 1);
346 CERROR("can't add initial connection\n");
347 GOTO(err_import, rc);
350 cli->cl_import = imp;
351 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
352 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
353 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
355 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
356 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
357 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
358 name, obddev->obd_name,
359 cli->cl_target_uuid.uuid);
360 spin_lock(&imp->imp_lock);
361 imp->imp_invalid = 1;
362 spin_unlock(&imp->imp_lock);
366 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
371 class_destroy_import(imp);
379 int client_obd_cleanup(struct obd_device *obddev)
386 /* ->o_connect() method for client side (OSC and MDC and MGC) */
387 int client_connect_import(const struct lu_env *env,
388 struct lustre_handle *dlm_handle,
389 struct obd_device *obd, struct obd_uuid *cluuid,
390 struct obd_connect_data *data, void *localdata)
392 struct client_obd *cli = &obd->u.cli;
393 struct obd_import *imp = cli->cl_import;
394 struct obd_export *exp;
395 struct obd_connect_data *ocd;
396 struct ldlm_namespace *to_be_freed = NULL;
400 down_write(&cli->cl_sem);
401 rc = class_connect(dlm_handle, obd, cluuid);
405 cli->cl_conn_count++;
406 if (cli->cl_conn_count > 1)
408 exp = class_conn2export(dlm_handle);
410 if (obd->obd_namespace != NULL)
411 CERROR("already have namespace!\n");
412 obd->obd_namespace = ldlm_namespace_new(obd, obd->obd_name,
413 LDLM_NAMESPACE_CLIENT,
414 LDLM_NAMESPACE_GREEDY);
415 if (obd->obd_namespace == NULL)
416 GOTO(out_disco, rc = -ENOMEM);
418 imp->imp_dlm_handle = *dlm_handle;
419 rc = ptlrpc_init_import(imp);
423 ocd = &imp->imp_connect_data;
426 imp->imp_connect_flags_orig = data->ocd_connect_flags;
429 rc = ptlrpc_connect_import(imp, NULL);
431 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
434 LASSERT(exp->exp_connection);
437 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
438 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
439 data->ocd_connect_flags, ocd->ocd_connect_flags);
440 data->ocd_connect_flags = ocd->ocd_connect_flags;
443 ptlrpc_pinger_add_import(imp);
449 ldlm_namespace_free_prior(obd->obd_namespace, imp, 0);
450 to_be_freed = obd->obd_namespace;
451 obd->obd_namespace = NULL;
453 cli->cl_conn_count--;
454 class_disconnect(exp);
456 class_export_put(exp);
459 up_write(&cli->cl_sem);
461 ldlm_namespace_free_post(to_be_freed);
466 int client_disconnect_export(struct obd_export *exp)
468 struct obd_device *obd = class_exp2obd(exp);
469 struct client_obd *cli;
470 struct obd_import *imp;
472 struct ldlm_namespace *to_be_freed = NULL;
476 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
477 exp, exp ? exp->exp_handle.h_cookie : -1);
482 imp = cli->cl_import;
484 down_write(&cli->cl_sem);
485 if (!cli->cl_conn_count) {
486 CERROR("disconnecting disconnected device (%s)\n",
488 GOTO(out_sem, rc = -EINVAL);
491 cli->cl_conn_count--;
492 if (cli->cl_conn_count)
493 GOTO(out_no_disconnect, rc = 0);
495 /* Mark import deactivated now, so we don't try to reconnect if any
496 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
497 * fully deactivate the import, or that would drop all requests. */
498 spin_lock(&imp->imp_lock);
499 imp->imp_deactive = 1;
500 spin_unlock(&imp->imp_lock);
502 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
503 * delete it regardless. (It's safe to delete an import that was
505 (void)ptlrpc_pinger_del_import(imp);
507 if (obd->obd_namespace != NULL) {
508 /* obd_force == local only */
509 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
510 obd->obd_force ? LDLM_FL_LOCAL_ONLY:0,
512 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
513 to_be_freed = obd->obd_namespace;
516 rc = ptlrpc_disconnect_import(imp, 0);
518 ptlrpc_invalidate_import(imp);
519 /* set obd_namespace to NULL only after invalidate, because we can have
520 * some connect requests in flight, and his need store a connect flags
521 * in obd_namespace. bug 14260 */
522 obd->obd_namespace = NULL;
524 if (imp->imp_rq_pool) {
525 ptlrpc_free_rq_pool(imp->imp_rq_pool);
526 imp->imp_rq_pool = NULL;
529 cli->cl_import = NULL;
533 err = class_disconnect(exp);
537 up_write(&cli->cl_sem);
539 ldlm_namespace_free_post(to_be_freed);
544 /* --------------------------------------------------------------------------
545 * from old lib/target.c
546 * -------------------------------------------------------------------------- */
548 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
549 struct obd_uuid *cluuid, int initial_conn)
552 if (exp->exp_connection && exp->exp_imp_reverse && !initial_conn) {
553 struct lustre_handle *hdl;
554 hdl = &exp->exp_imp_reverse->imp_remote_handle;
555 /* Might be a re-connect after a partition. */
556 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
557 CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name,
559 conn->cookie = exp->exp_handle.h_cookie;
560 /* target_handle_connect() treats EALREADY and
561 * -EALREADY differently. EALREADY means we are
562 * doing a valid reconnect from the same client. */
565 CERROR("%s reconnecting from %s, "
566 "handle mismatch (ours "LPX64", theirs "
567 LPX64")\n", cluuid->uuid,
568 exp->exp_connection->c_remote_uuid.uuid,
569 hdl->cookie, conn->cookie);
570 memset(conn, 0, sizeof *conn);
571 /* target_handle_connect() treats EALREADY and
572 * -EALREADY differently. -EALREADY is an error
573 * (same UUID, different handle). */
578 conn->cookie = exp->exp_handle.h_cookie;
579 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
580 cluuid->uuid, exp, conn->cookie);
584 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
587 struct obd_export *exp = cb_data;
589 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
590 obd->obd_name, exp->exp_client_uuid.uuid);
592 spin_lock(&exp->exp_lock);
593 exp->exp_need_sync = 0;
594 spin_unlock(&exp->exp_lock);
596 EXPORT_SYMBOL(target_client_add_cb);
598 target_start_and_reset_recovery_timer(struct obd_device *obd,
599 struct ptlrpc_request *req,
602 int target_handle_connect(struct ptlrpc_request *req)
604 struct obd_device *target, *targref = NULL;
605 struct obd_export *export = NULL;
606 struct obd_import *revimp;
607 struct lustre_handle conn;
608 struct lustre_handle *tmp;
609 struct obd_uuid tgtuuid;
610 struct obd_uuid cluuid;
611 struct obd_uuid remote_uuid;
614 int initial_conn = 0;
615 struct obd_connect_data *data, *tmpdata;
616 lnet_nid_t *client_nid = NULL;
619 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
621 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
623 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
624 GOTO(out, rc = -EINVAL);
627 obd_str2uuid(&tgtuuid, str);
628 target = class_uuid2obd(&tgtuuid);
630 target = class_name2obd(str);
632 if (!target || target->obd_stopping || !target->obd_set_up) {
633 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available "
634 " for connect (%s)\n", str,
635 !target ? "no target" :
636 (target->obd_stopping ? "stopping" :
638 GOTO(out, rc = -ENODEV);
641 if (target->obd_no_conn) {
642 LCONSOLE_WARN("%s: temporarily refusing client connection "
643 "from %s\n", target->obd_name,
644 libcfs_nid2str(req->rq_peer.nid));
645 GOTO(out, rc = -EAGAIN);
648 /* Make sure the target isn't cleaned up while we're here. Yes,
649 there's still a race between the above check and our incref here.
650 Really, class_uuid2obd should take the ref. */
651 targref = class_incref(target, __FUNCTION__, cfs_current());
654 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
656 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
657 GOTO(out, rc = -EINVAL);
660 obd_str2uuid(&cluuid, str);
662 /* XXX extract a nettype and format accordingly */
663 switch (sizeof(lnet_nid_t)) {
664 /* NB the casts only avoid compiler warnings */
666 snprintf(remote_uuid.uuid, sizeof remote_uuid,
667 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
670 snprintf(remote_uuid.uuid, sizeof remote_uuid,
671 "NET_%x_UUID", (__u32)req->rq_peer.nid);
677 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
679 GOTO(out, rc = -EPROTO);
683 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
685 GOTO(out, rc = -EPROTO);
687 rc = req_capsule_server_pack(&req->rq_pill);
691 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
693 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
694 "libclient connection attempt");
695 GOTO(out, rc = -EPROTO);
696 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
697 LUSTRE_VERSION_ALLOWED_OFFSET ||
698 data->ocd_version > LUSTRE_VERSION_CODE +
699 LUSTRE_VERSION_ALLOWED_OFFSET) {
700 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
701 "libclient connection attempt",
702 data->ocd_version < LUSTRE_VERSION_CODE ?
704 OBD_OCD_VERSION_MAJOR(data->ocd_version),
705 OBD_OCD_VERSION_MINOR(data->ocd_version),
706 OBD_OCD_VERSION_PATCH(data->ocd_version),
707 OBD_OCD_VERSION_FIX(data->ocd_version));
708 data = req_capsule_server_sized_get(&req->rq_pill,
710 offsetof(typeof(*data), ocd_version) +
711 sizeof(data->ocd_version));
713 data->ocd_connect_flags = OBD_CONNECT_VERSION;
714 data->ocd_version = LUSTRE_VERSION_CODE;
716 GOTO(out, rc = -EPROTO);
720 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)
723 /* lctl gets a backstage, all-access pass. */
724 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
725 goto dont_check_exports;
727 spin_lock(&target->obd_dev_lock);
728 export = lustre_hash_lookup(target->obd_uuid_hash, &cluuid);
730 if (export != NULL && export->exp_connecting) { /* bug 9635, et. al. */
731 CWARN("%s: exp %p already connecting\n",
732 export->exp_obd->obd_name, export);
733 class_export_put(export);
736 } else if (export != NULL && export->exp_connection != NULL &&
737 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
738 /* make darn sure this is coming from the same peer
739 * if the UUIDs matched */
740 CWARN("%s: cookie %s seen on new NID %s when "
741 "existing NID %s is already connected\n",
742 target->obd_name, cluuid.uuid,
743 libcfs_nid2str(req->rq_peer.nid),
744 libcfs_nid2str(export->exp_connection->c_peer.nid));
745 class_export_put(export);
748 } else if (export != NULL) {
749 spin_lock(&export->exp_lock);
750 export->exp_connecting = 1;
751 spin_unlock(&export->exp_lock);
752 class_export_put(export);
753 spin_unlock(&target->obd_dev_lock);
754 LASSERT(export->exp_obd == target);
756 rc = target_handle_reconnect(&conn, export, &cluuid, initial_conn);
759 /* If we found an export, we already unlocked. */
761 spin_unlock(&target->obd_dev_lock);
762 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
763 } else if (req->rq_export == NULL &&
764 atomic_read(&export->exp_rpc_count) > 0) {
765 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
766 target->obd_name, cluuid.uuid,
767 libcfs_nid2str(req->rq_peer.nid),
768 export, atomic_read(&export->exp_refcount));
769 GOTO(out, rc = -EBUSY);
770 } else if (req->rq_export != NULL &&
771 (atomic_read(&export->exp_rpc_count) > 1)) {
772 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
773 target->obd_name, cluuid.uuid,
774 libcfs_nid2str(req->rq_peer.nid),
775 export, atomic_read(&export->exp_rpc_count));
776 GOTO(out, rc = -EBUSY);
777 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1 &&
779 CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; "
780 "cookies not random?\n", target->obd_name,
781 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid);
782 GOTO(out, rc = -EALREADY);
784 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
785 if (req->rq_export == NULL && initial_conn)
786 export->exp_last_request_time =
787 max(export->exp_last_request_time,
788 (time_t)cfs_time_current_sec());
795 CWARN("%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
796 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
797 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
798 export, (long)cfs_time_current_sec(),
799 export ? (long)export->exp_last_request_time : 0);
801 /* Tell the client if we're in recovery. */
802 if (target->obd_recovering) {
803 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
804 /* If this is the first time a client connects,
805 reset the recovery timer */
807 target_start_and_reset_recovery_timer(target, req,
811 /* We want to handle EALREADY but *not* -EALREADY from
812 * target_handle_reconnect(), return reconnection state in a flag */
813 if (rc == EALREADY) {
814 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
820 /* Tell the client if we support replayable requests */
821 if (target->obd_replayable)
822 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
823 client_nid = &req->rq_peer.nid;
825 if (export == NULL) {
826 if (target->obd_recovering) {
829 t = cfs_timer_deadline(&target->obd_recovery_timer);
830 t = cfs_time_sub(t, cfs_time_current());
831 CERROR("%s: denying connection for new client %s (%s): "
832 "%d clients in recovery for "CFS_TIME_T"s\n",
834 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid,
835 target->obd_recoverable_clients,
836 cfs_duration_sec(t));
840 rc = obd_connect(req->rq_svc_thread->t_env,
841 &conn, target, &cluuid, data,
845 rc = obd_reconnect(req->rq_svc_thread->t_env,
846 export, target, &cluuid, data, client_nid);
850 /* Return only the parts of obd_connect_data that we understand, so the
851 * client knows that we don't understand the rest. */
853 tmpdata = req_capsule_server_get(&req->rq_pill,
855 //data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED;
859 /* If all else goes well, this is our RPC return code. */
862 lustre_msg_set_handle(req->rq_repmsg, &conn);
864 /* ownership of this export ref transfers to the request AFTER we
865 * drop any previous reference the request had, but we don't want
866 * that to go to zero before we get our new export reference. */
867 export = class_conn2export(&conn);
869 DEBUG_REQ(D_ERROR, req, "Missing export!");
870 GOTO(out, rc = -ENODEV);
873 /* If the client and the server are the same node, we will already
874 * have an export that really points to the client's DLM export,
875 * because we have a shared handles table.
877 * XXX this will go away when shaver stops sending the "connect" handle
878 * in the real "remote handle" field of the request --phik 24 Apr 2003
880 if (req->rq_export != NULL)
881 class_export_put(req->rq_export);
883 req->rq_export = export;
885 spin_lock(&export->exp_lock);
887 lustre_msg_set_conn_cnt(req->rq_repmsg, export->exp_conn_cnt + 1);
888 } else if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
889 spin_unlock(&export->exp_lock);
890 CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n",
891 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
892 export->exp_conn_cnt,
893 lustre_msg_get_conn_cnt(req->rq_reqmsg));
895 GOTO(out, rc = -EALREADY);
897 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
899 /* request from liblustre? Don't evict it for not pinging. */
900 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
901 export->exp_libclient = 1;
902 spin_unlock(&export->exp_lock);
904 spin_lock(&target->obd_dev_lock);
905 list_del_init(&export->exp_obd_chain_timed);
906 spin_unlock(&target->obd_dev_lock);
908 spin_unlock(&export->exp_lock);
911 if (export->exp_connection != NULL)
912 ptlrpc_connection_put(export->exp_connection);
913 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
916 if (hlist_unhashed(&export->exp_nid_hash)) {
917 lustre_hash_add_unique(export->exp_obd->obd_nid_hash,
918 &export->exp_connection->c_peer.nid,
919 &export->exp_nid_hash);
922 spin_lock_bh(&target->obd_processing_task_lock);
923 if (target->obd_recovering && !export->exp_in_recovery) {
924 spin_lock(&export->exp_lock);
925 export->exp_in_recovery = 1;
926 export->exp_req_replay_needed = 1;
927 export->exp_lock_replay_needed = 1;
928 spin_unlock(&export->exp_lock);
929 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
930 && (data->ocd_transno == 0))
931 CWARN("Connect with zero transno!\n");
933 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
934 && data->ocd_transno < target->obd_next_recovery_transno)
935 target->obd_next_recovery_transno = data->ocd_transno;
936 target->obd_connected_clients++;
937 /* each connected client is counted as recoverable */
938 target->obd_recoverable_clients++;
939 atomic_inc(&target->obd_req_replay_clients);
940 atomic_inc(&target->obd_lock_replay_clients);
941 if (target->obd_connected_clients ==
942 target->obd_max_recoverable_clients)
943 wake_up(&target->obd_next_transno_waitq);
945 spin_unlock_bh(&target->obd_processing_task_lock);
946 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
949 if (export->exp_imp_reverse != NULL) {
950 /* destroyed import can be still referenced in ctxt */
951 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
952 KEY_REVIMP_UPD, 0, NULL, NULL);
954 /* in some recovery senarios, previous ctx init rpc handled
955 * in sptlrpc_target_export_check() might be used to install
956 * a reverse ctx in this reverse import, and later OBD_CONNECT
957 * using the same gss ctx could reach here and following new
958 * reverse import. note all reverse ctx in new/old import are
959 * actually based on the same gss ctx. so we invalidate ctx
960 * here before destroy import, otherwise flush old import will
961 * lead to remote reverse ctx be destroied, thus the reverse
962 * ctx of new import will lost its peer.
963 * there might be a better way to deal with this???
965 sptlrpc_import_inval_all_ctx(export->exp_imp_reverse);
967 destroy_import(export->exp_imp_reverse);
970 /* for the rest part, we return -ENOTCONN in case of errors
971 * in order to let client initialize connection again.
973 revimp = export->exp_imp_reverse = class_new_import(target);
975 CERROR("fail to alloc new reverse import.\n");
976 GOTO(out, rc = -ENOTCONN);
979 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
980 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
981 revimp->imp_remote_handle = conn;
982 revimp->imp_dlm_fake = 1;
983 revimp->imp_state = LUSTRE_IMP_FULL;
985 /* unknown versions will be caught in
986 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
987 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
989 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
990 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
991 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
993 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
995 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx,
996 req->rq_flvr.sf_rpc);
998 CERROR("Failed to get sec for reverse import: %d\n", rc);
999 export->exp_imp_reverse = NULL;
1000 class_destroy_import(revimp);
1003 class_import_put(revimp);
1006 spin_lock(&export->exp_lock);
1007 export->exp_connecting = 0;
1008 spin_unlock(&export->exp_lock);
1011 class_decref(targref, __FUNCTION__, cfs_current());
1013 req->rq_status = rc;
1017 int target_handle_disconnect(struct ptlrpc_request *req)
1022 rc = req_capsule_server_pack(&req->rq_pill);
1026 /* keep the rq_export around so we can send the reply */
1027 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1032 void target_destroy_export(struct obd_export *exp)
1034 /* exports created from last_rcvd data, and "fake"
1035 exports created by lctl don't have an import */
1036 if (exp->exp_imp_reverse != NULL)
1037 destroy_import(exp->exp_imp_reverse);
1039 /* We cancel locks at disconnect time, but this will catch any locks
1040 * granted in a race with recovery-induced disconnect. */
1041 if (exp->exp_obd->obd_namespace != NULL)
1042 ldlm_cancel_locks_for_export(exp);
1046 * Recovery functions
1049 struct ptlrpc_request *ptlrpc_clone_req( struct ptlrpc_request *orig_req)
1051 struct ptlrpc_request *copy_req;
1052 struct lustre_msg *copy_reqmsg;
1053 struct ptlrpc_user_desc *udesc = NULL;
1055 OBD_ALLOC_PTR(copy_req);
1058 OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
1060 OBD_FREE_PTR(copy_req);
1064 if (orig_req->rq_user_desc) {
1065 int ngroups = orig_req->rq_user_desc->pud_ngroups;
1067 OBD_ALLOC(udesc, sptlrpc_user_desc_size(ngroups));
1069 OBD_FREE(copy_reqmsg, orig_req->rq_reqlen);
1070 OBD_FREE_PTR(copy_req);
1073 memcpy(udesc, orig_req->rq_user_desc,
1074 sptlrpc_user_desc_size(ngroups));
1077 *copy_req = *orig_req;
1078 memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
1079 copy_req->rq_reqmsg = copy_reqmsg;
1080 copy_req->rq_user_desc = udesc;
1082 class_export_rpc_get(copy_req->rq_export);
1083 CFS_INIT_LIST_HEAD(©_req->rq_list);
1084 CFS_INIT_LIST_HEAD(©_req->rq_replay_list);
1085 sptlrpc_svc_ctx_addref(copy_req);
1087 if (copy_req->rq_reply_state) {
1088 /* the copied req takes over the reply state */
1089 orig_req->rq_reply_state = NULL;
1090 /* to catch further access */
1091 orig_req->rq_repmsg = NULL;
1092 orig_req->rq_replen = 0;
1098 void ptlrpc_free_clone(struct ptlrpc_request *req)
1100 LASSERT(list_empty(&req->rq_replay_list));
1102 ptlrpc_req_drop_rs(req);
1103 sptlrpc_svc_ctx_decref(req);
1104 class_export_rpc_put(req->rq_export);
1105 list_del_init(&req->rq_list);
1107 if (req->rq_user_desc) {
1108 int ngroups = req->rq_user_desc->pud_ngroups;
1109 OBD_FREE(req->rq_user_desc, sptlrpc_user_desc_size(ngroups));
1111 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
1115 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1117 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1118 struct obd_export *exp = req->rq_export;
1119 struct ptlrpc_request *reqiter;
1124 spin_lock(&exp->exp_lock);
1125 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1127 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1134 /* we expect it with RESENT and REPLAY flags */
1135 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1136 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1137 CERROR("invalid flags %x of resent replay\n",
1138 lustre_msg_get_flags(req->rq_reqmsg));
1140 list_add_tail(&req->rq_replay_list, &exp->exp_req_replay_queue);
1143 spin_unlock(&exp->exp_lock);
1147 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1149 LASSERT(!list_empty(&req->rq_replay_list));
1150 LASSERT(req->rq_export);
1152 spin_lock(&req->rq_export->exp_lock);
1153 list_del_init(&req->rq_replay_list);
1154 spin_unlock(&req->rq_export->exp_lock);
1158 static void target_finish_recovery(struct obd_device *obd)
1161 LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n",
1164 ldlm_reprocess_all_ns(obd->obd_namespace);
1165 spin_lock_bh(&obd->obd_processing_task_lock);
1166 if (list_empty(&obd->obd_req_replay_queue) &&
1167 list_empty(&obd->obd_lock_replay_queue) &&
1168 list_empty(&obd->obd_final_req_queue)) {
1169 obd->obd_processing_task = 0;
1171 CERROR("%s: Recovery queues ( %s%s%s) are empty\n",
1173 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1174 list_empty(&obd->obd_lock_replay_queue) ? "" : "lock ",
1175 list_empty(&obd->obd_final_req_queue) ? "" : "final ");
1176 spin_unlock_bh(&obd->obd_processing_task_lock);
1179 spin_unlock_bh(&obd->obd_processing_task_lock);
1181 /* when recovery finished, cleanup orphans on mds and ost */
1182 if (OBT(obd) && OBP(obd, postrecov)) {
1183 int rc = OBP(obd, postrecov)(obd);
1184 LCONSOLE_WARN("%s: recovery %s: rc %d\n", obd->obd_name,
1185 rc < 0 ? "failed" : "complete", rc);
1188 obd->obd_recovery_end = cfs_time_current_sec();
1192 static void abort_req_replay_queue(struct obd_device *obd)
1194 struct ptlrpc_request *req, *n;
1195 struct list_head abort_list;
1197 CFS_INIT_LIST_HEAD(&abort_list);
1198 spin_lock_bh(&obd->obd_processing_task_lock);
1199 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1200 spin_unlock_bh(&obd->obd_processing_task_lock);
1201 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1202 DEBUG_REQ(D_WARNING, req, "aborted:");
1203 req->rq_status = -ENOTCONN;
1204 if (ptlrpc_error(req)) {
1205 DEBUG_REQ(D_ERROR, req,
1206 "failed abort_req_reply; skipping");
1208 target_exp_dequeue_req_replay(req);
1209 ptlrpc_free_clone(req);
1213 static void abort_lock_replay_queue(struct obd_device *obd)
1215 struct ptlrpc_request *req, *n;
1216 struct list_head abort_list;
1218 CFS_INIT_LIST_HEAD(&abort_list);
1219 spin_lock_bh(&obd->obd_processing_task_lock);
1220 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1221 spin_unlock_bh(&obd->obd_processing_task_lock);
1222 list_for_each_entry_safe(req, n, &obd->obd_lock_replay_queue, rq_list){
1223 DEBUG_REQ(D_ERROR, req, "aborted:");
1224 req->rq_status = -ENOTCONN;
1225 if (ptlrpc_error(req)) {
1226 DEBUG_REQ(D_ERROR, req,
1227 "failed abort_lock_reply; skipping");
1229 ptlrpc_free_clone(req);
1234 /* Called from a cleanup function if the device is being cleaned up
1235 forcefully. The exports should all have been disconnected already,
1236 the only thing left to do is
1237 - clear the recovery flags
1239 - free queued requests and replies, but don't send replies
1240 Because the obd_stopping flag is set, no new requests should be received.
1243 void target_cleanup_recovery(struct obd_device *obd)
1245 struct ptlrpc_request *req, *n;
1246 struct list_head clean_list;
1249 LASSERT(obd->obd_stopping);
1251 CFS_INIT_LIST_HEAD(&clean_list);
1252 spin_lock_bh(&obd->obd_processing_task_lock);
1253 if (!obd->obd_recovering) {
1254 spin_unlock_bh(&obd->obd_processing_task_lock);
1258 obd->obd_recovering = obd->obd_abort_recovery = 0;
1259 target_cancel_recovery_timer(obd);
1261 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1262 spin_unlock_bh(&obd->obd_processing_task_lock);
1264 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1265 LASSERT(req->rq_reply_state == 0);
1266 target_exp_dequeue_req_replay(req);
1267 ptlrpc_free_clone(req);
1270 spin_lock_bh(&obd->obd_processing_task_lock);
1271 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1272 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1273 spin_unlock_bh(&obd->obd_processing_task_lock);
1275 list_for_each_entry_safe(req, n, &clean_list, rq_list){
1276 LASSERT(req->rq_reply_state == 0);
1277 ptlrpc_free_clone(req);
1283 /* obd_processing_task_lock should be held */
1284 void target_cancel_recovery_timer(struct obd_device *obd)
1286 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1287 cfs_timer_disarm(&obd->obd_recovery_timer);
1290 /* extend = 1 means require at least "duration" seconds left in the timer,
1291 extend = 0 means set the total duration (start_recovery_timer) */
1292 static void reset_recovery_timer(struct obd_device *obd, int duration,
1295 cfs_time_t now = cfs_time_current_sec();
1296 cfs_duration_t left;
1298 spin_lock_bh(&obd->obd_processing_task_lock);
1299 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1300 spin_unlock_bh(&obd->obd_processing_task_lock);
1304 left = cfs_time_sub(obd->obd_recovery_end, now);
1306 if (extend && (duration > left))
1307 obd->obd_recovery_timeout += duration - left;
1308 else if (!extend && (duration > obd->obd_recovery_timeout))
1309 /* Track the client's largest expected replay time */
1310 obd->obd_recovery_timeout = duration;
1313 * If total recovery time already exceed the
1314 * obd_recovery_max_time, then CRAY XT3 will
1315 * abort the recovery
1317 if(obd->obd_recovery_timeout > obd->obd_recovery_max_time)
1318 obd->obd_recovery_timeout = obd->obd_recovery_max_time;
1320 obd->obd_recovery_end = obd->obd_recovery_start +
1321 obd->obd_recovery_timeout;
1322 if (!cfs_timer_is_armed(&obd->obd_recovery_timer) ||
1323 cfs_time_before(now, obd->obd_recovery_end)) {
1324 left = cfs_time_sub(obd->obd_recovery_end, now);
1325 cfs_timer_arm(&obd->obd_recovery_timer, cfs_time_shift(left));
1327 spin_unlock_bh(&obd->obd_processing_task_lock);
1328 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1329 obd->obd_name, (unsigned)left);
1332 static void check_and_start_recovery_timer(struct obd_device *obd)
1334 spin_lock_bh(&obd->obd_processing_task_lock);
1335 if (cfs_timer_is_armed(&obd->obd_recovery_timer)) {
1336 spin_unlock_bh(&obd->obd_processing_task_lock);
1339 CWARN("%s: starting recovery timer\n", obd->obd_name);
1340 obd->obd_recovery_start = cfs_time_current_sec();
1342 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1343 spin_unlock_bh(&obd->obd_processing_task_lock);
1345 reset_recovery_timer(obd, obd->obd_recovery_timeout, 0);
1348 /* Reset the timer with each new client connection */
1350 * This timer is actually reconnect_timer, which is for making sure
1351 * the total recovery window is at least as big as my reconnect
1352 * attempt timing. So the initial recovery time_out will be set to
1353 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1354 * from client is bigger than this, then the recovery time_out will
1355 * be extend to make sure the client could be reconnected, in the
1356 * process, the timeout from the new client should be ignored.
1360 target_start_and_reset_recovery_timer(struct obd_device *obd,
1361 struct ptlrpc_request *req,
1364 int req_timeout = lustre_msg_get_timeout(req->rq_reqmsg);
1366 /* teach server about old server's estimates */
1368 at_add(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1369 at_timeout2est(req_timeout));
1371 check_and_start_recovery_timer(obd);
1373 req_timeout *= OBD_RECOVERY_FACTOR;
1374 if (req_timeout > obd->obd_recovery_timeout && !new_client)
1375 reset_recovery_timer(obd, req_timeout, 0);
1379 static int check_for_next_transno(struct obd_device *obd)
1381 struct ptlrpc_request *req = NULL;
1382 int wake_up = 0, connected, completed, queue_len, max;
1383 __u64 next_transno, req_transno;
1385 spin_lock_bh(&obd->obd_processing_task_lock);
1387 if (!list_empty(&obd->obd_req_replay_queue)) {
1388 req = list_entry(obd->obd_req_replay_queue.next,
1389 struct ptlrpc_request, rq_list);
1390 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1395 max = obd->obd_max_recoverable_clients;
1396 connected = obd->obd_connected_clients;
1397 completed = connected - obd->obd_recoverable_clients;
1398 queue_len = obd->obd_requests_queued_for_recovery;
1399 next_transno = obd->obd_next_recovery_transno;
1401 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1402 "req_transno: "LPU64", next_transno: "LPU64"\n",
1403 max, connected, completed, queue_len, req_transno, next_transno);
1405 if (obd->obd_abort_recovery) {
1406 CDEBUG(D_HA, "waking for aborted recovery\n");
1408 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1409 CDEBUG(D_HA, "waking for completed recovery\n");
1411 } else if (req_transno == next_transno) {
1412 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1414 } else if (queue_len + completed == max) {
1415 /* handle gaps occured due to lost reply. It is allowed gaps
1416 * because all clients are connected and there will be resend
1417 * for missed transaction */
1418 LASSERTF(req_transno >= next_transno,
1419 "req_transno: "LPU64", next_transno: "LPU64"\n",
1420 req_transno, next_transno);
1422 CDEBUG(req_transno > obd->obd_last_committed ? D_ERROR : D_HA,
1423 "waking for skipped transno (skip: "LPD64
1424 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
1425 next_transno, queue_len, completed, connected, req_transno);
1426 obd->obd_next_recovery_transno = req_transno;
1428 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1429 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1430 " by fail_lock, waking up ("LPD64")\n", next_transno);
1431 obd->obd_next_recovery_transno = req_transno;
1433 } else if (queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1434 /* some clients haven't connected in time, but we can try
1435 * to replay requests that demand on already committed ones
1436 * also, we can replay first non-committed transation */
1437 LASSERT(req_transno != 0);
1438 if (req_transno == obd->obd_last_committed + 1) {
1439 obd->obd_next_recovery_transno = req_transno;
1440 } else if (req_transno > obd->obd_last_committed) {
1441 /* can't continue recovery: have no needed transno */
1442 obd->obd_abort_recovery = 1;
1443 CDEBUG(D_ERROR, "abort due to missed clients. max: %d, "
1444 "connected: %d, completed: %d, queue_len: %d, "
1445 "req_transno: "LPU64", next_transno: "LPU64"\n",
1446 max, connected, completed, queue_len,
1447 req_transno, next_transno);
1452 spin_unlock_bh(&obd->obd_processing_task_lock);
1456 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1458 struct l_wait_info lwi = { 0 };
1459 struct ptlrpc_request *req;
1461 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1462 obd->obd_next_recovery_transno);
1463 l_wait_event(obd->obd_next_transno_waitq,
1464 check_for_next_transno(obd), &lwi);
1466 spin_lock_bh(&obd->obd_processing_task_lock);
1467 if (obd->obd_abort_recovery) {
1469 } else if (!list_empty(&obd->obd_req_replay_queue)) {
1470 req = list_entry(obd->obd_req_replay_queue.next,
1471 struct ptlrpc_request, rq_list);
1472 target_exp_dequeue_req_replay(req);
1473 list_del_init(&req->rq_list);
1474 obd->obd_requests_queued_for_recovery--;
1478 spin_unlock_bh(&obd->obd_processing_task_lock);
1482 static int check_for_next_lock(struct obd_device *obd)
1484 struct ptlrpc_request *req = NULL;
1487 spin_lock_bh(&obd->obd_processing_task_lock);
1488 if (!list_empty(&obd->obd_lock_replay_queue)) {
1489 req = list_entry(obd->obd_lock_replay_queue.next,
1490 struct ptlrpc_request, rq_list);
1491 CDEBUG(D_HA, "waking for next lock\n");
1493 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1494 CDEBUG(D_HA, "waking for completed lock replay\n");
1496 } else if (obd->obd_abort_recovery) {
1497 CDEBUG(D_HA, "waking for aborted recovery\n");
1500 spin_unlock_bh(&obd->obd_processing_task_lock);
1505 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1507 struct l_wait_info lwi = { 0 };
1508 struct ptlrpc_request *req;
1510 CDEBUG(D_HA, "Waiting for lock\n");
1511 l_wait_event(obd->obd_next_transno_waitq,
1512 check_for_next_lock(obd), &lwi);
1514 spin_lock_bh(&obd->obd_processing_task_lock);
1515 if (obd->obd_abort_recovery) {
1517 } else if (!list_empty(&obd->obd_lock_replay_queue)) {
1518 req = list_entry(obd->obd_lock_replay_queue.next,
1519 struct ptlrpc_request, rq_list);
1520 list_del_init(&req->rq_list);
1524 spin_unlock_bh(&obd->obd_processing_task_lock);
1528 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1530 struct ptlrpc_request *req;
1532 spin_lock_bh(&obd->obd_processing_task_lock);
1533 if (!list_empty(&obd->obd_final_req_queue)) {
1534 req = list_entry(obd->obd_final_req_queue.next,
1535 struct ptlrpc_request, rq_list);
1536 list_del_init(&req->rq_list);
1540 spin_unlock_bh(&obd->obd_processing_task_lock);
1544 static inline int req_replay_done(struct obd_export *exp)
1546 return (exp->exp_req_replay_needed == 0);
1549 static inline int lock_replay_done(struct obd_export *exp)
1551 return (exp->exp_lock_replay_needed == 0);
1554 static inline int connect_done(struct obd_export *exp)
1556 return (exp->exp_in_recovery != 0);
1559 static int check_for_clients(struct obd_device *obd)
1561 if (obd->obd_abort_recovery)
1563 LASSERT(obd->obd_connected_clients <= obd->obd_max_recoverable_clients);
1564 if (obd->obd_no_conn == 0 &&
1565 obd->obd_connected_clients == obd->obd_max_recoverable_clients)
1570 static int handle_recovery_req(struct ptlrpc_thread *thread,
1571 struct ptlrpc_request *req,
1572 svc_handler_t handler)
1577 rc = lu_context_init(&req->rq_session, LCT_SESSION);
1579 CERROR("Failure to initialize session: %d\n", rc);
1582 req->rq_session.lc_thread = thread;
1583 lu_context_enter(&req->rq_session);
1584 req->rq_svc_thread = thread;
1585 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
1587 /* thread context */
1588 lu_context_enter(&thread->t_env->le_ctx);
1590 lu_context_exit(&thread->t_env->le_ctx);
1592 lu_context_exit(&req->rq_session);
1593 lu_context_fini(&req->rq_session);
1594 /* don't reset timer for final stage */
1595 if (!req_replay_done(req->rq_export) ||
1596 !lock_replay_done(req->rq_export))
1597 reset_recovery_timer(class_exp2obd(req->rq_export),
1598 OBD_RECOVERY_FACTOR * AT_OFF ? obd_timeout :
1599 at_get(&req->rq_rqbd->rqbd_service->srv_at_estimate), 1);
1600 ptlrpc_free_clone(req);
1604 static void resume_recovery_timer(struct obd_device *obd)
1606 /* to be safe, make it at least OBD_RECOVERY_FACTOR * obd_timeout */
1607 reset_recovery_timer(obd, OBD_RECOVERY_FACTOR * obd_timeout, 1);
1610 static int target_recovery_thread(void *arg)
1612 struct obd_device *obd = arg;
1613 struct ptlrpc_request *req;
1614 struct target_recovery_data *trd = &obd->obd_recovery_data;
1615 struct l_wait_info lwi = { 0 };
1616 unsigned long delta;
1617 unsigned long flags;
1619 struct ptlrpc_thread fake_svc_thread, *thread = &fake_svc_thread;
1623 cfs_daemonize("tgt_recov");
1625 SIGNAL_MASK_LOCK(current, flags);
1626 sigfillset(¤t->blocked);
1628 SIGNAL_MASK_UNLOCK(current, flags);
1630 rc = lu_context_init(&env.le_ctx, LCT_MD_THREAD);
1634 thread->t_env = &env;
1635 env.le_ctx.lc_thread = thread;
1637 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
1639 trd->trd_processing_task = current->pid;
1641 obd->obd_recovering = 1;
1642 complete(&trd->trd_starting);
1644 /* first of all, we have to know the first transno to replay */
1645 obd->obd_abort_recovery = 0;
1646 l_wait_event(obd->obd_next_transno_waitq,
1647 check_for_clients(obd), &lwi);
1649 spin_lock_bh(&obd->obd_processing_task_lock);
1650 target_cancel_recovery_timer(obd);
1651 spin_unlock_bh(&obd->obd_processing_task_lock);
1653 /* If some clients haven't connected in time, evict them */
1654 if (obd->obd_abort_recovery) {
1655 CWARN("Some clients haven't connect in time (%d/%d),"
1656 "evict them\n", obd->obd_connected_clients,
1657 obd->obd_max_recoverable_clients);
1658 obd->obd_abort_recovery = obd->obd_stopping;
1659 class_disconnect_stale_exports(obd, connect_done);
1661 /* next stage: replay requests */
1663 obd->obd_req_replaying = 1;
1664 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1665 atomic_read(&obd->obd_req_replay_clients),
1666 obd->obd_next_recovery_transno);
1667 resume_recovery_timer(obd);
1668 while ((req = target_next_replay_req(obd))) {
1669 LASSERT(trd->trd_processing_task == current->pid);
1670 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1671 lustre_msg_get_transno(req->rq_reqmsg),
1672 libcfs_nid2str(req->rq_peer.nid));
1673 handle_recovery_req(thread, req,
1674 trd->trd_recovery_handler);
1675 obd->obd_replayed_requests++;
1676 spin_lock_bh(&obd->obd_processing_task_lock);
1677 obd->obd_next_recovery_transno++;
1678 spin_unlock_bh(&obd->obd_processing_task_lock);
1681 spin_lock_bh(&obd->obd_processing_task_lock);
1682 target_cancel_recovery_timer(obd);
1683 spin_unlock_bh(&obd->obd_processing_task_lock);
1685 /* If some clients haven't replayed requests in time, evict them */
1686 if (obd->obd_abort_recovery) {
1687 CDEBUG(D_ERROR, "req replay timed out, aborting ...\n");
1688 obd->obd_abort_recovery = obd->obd_stopping;
1689 class_disconnect_stale_exports(obd, req_replay_done);
1690 abort_req_replay_queue(obd);
1693 /* The second stage: replay locks */
1694 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1695 atomic_read(&obd->obd_lock_replay_clients));
1696 resume_recovery_timer(obd);
1697 while ((req = target_next_replay_lock(obd))) {
1698 LASSERT(trd->trd_processing_task == current->pid);
1699 DEBUG_REQ(D_HA|D_WARNING, req, "processing lock from %s: ",
1700 libcfs_nid2str(req->rq_peer.nid));
1701 handle_recovery_req(thread, req,
1702 trd->trd_recovery_handler);
1703 obd->obd_replayed_locks++;
1706 spin_lock_bh(&obd->obd_processing_task_lock);
1707 target_cancel_recovery_timer(obd);
1708 spin_unlock_bh(&obd->obd_processing_task_lock);
1709 /* If some clients haven't replayed requests in time, evict them */
1710 if (obd->obd_abort_recovery) {
1712 CERROR("lock replay timed out, aborting ...\n");
1713 obd->obd_abort_recovery = obd->obd_stopping;
1714 stale = class_disconnect_stale_exports(obd, lock_replay_done);
1715 abort_lock_replay_queue(obd);
1718 /* We drop recoverying flag to forward all new requests
1719 * to regular mds_handle() since now */
1720 spin_lock_bh(&obd->obd_processing_task_lock);
1721 obd->obd_recovering = obd->obd_abort_recovery = 0;
1722 spin_unlock_bh(&obd->obd_processing_task_lock);
1723 /* The third stage: reply on final pings */
1724 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1725 while ((req = target_next_final_ping(obd))) {
1726 LASSERT(trd->trd_processing_task == current->pid);
1727 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1728 libcfs_nid2str(req->rq_peer.nid));
1729 handle_recovery_req(thread, req,
1730 trd->trd_recovery_handler);
1733 delta = (jiffies - delta) / HZ;
1734 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1735 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1736 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
1737 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
1738 if (delta > obd_timeout * 2) {
1739 CWARN("too long recovery - read logs\n");
1740 libcfs_debug_dumplog();
1743 target_finish_recovery(obd);
1745 lu_context_fini(&env.le_ctx);
1746 trd->trd_processing_task = 0;
1747 complete(&trd->trd_finishing);
1751 int target_start_recovery_thread(struct obd_device *obd, svc_handler_t handler)
1754 struct target_recovery_data *trd = &obd->obd_recovery_data;
1756 memset(trd, 0, sizeof(*trd));
1757 init_completion(&trd->trd_starting);
1758 init_completion(&trd->trd_finishing);
1759 trd->trd_recovery_handler = handler;
1761 if (kernel_thread(target_recovery_thread, obd, 0) > 0) {
1762 wait_for_completion(&trd->trd_starting);
1763 LASSERT(obd->obd_recovering != 0);
1770 void target_stop_recovery_thread(struct obd_device *obd)
1772 spin_lock_bh(&obd->obd_processing_task_lock);
1773 if (obd->obd_recovery_data.trd_processing_task > 0) {
1774 struct target_recovery_data *trd = &obd->obd_recovery_data;
1775 CERROR("%s: Aborting recovery\n", obd->obd_name);
1776 obd->obd_abort_recovery = 1;
1777 wake_up(&obd->obd_next_transno_waitq);
1778 spin_unlock_bh(&obd->obd_processing_task_lock);
1779 wait_for_completion(&trd->trd_finishing);
1781 spin_unlock_bh(&obd->obd_processing_task_lock);
1785 void target_recovery_fini(struct obd_device *obd)
1787 class_disconnect_exports(obd);
1788 target_stop_recovery_thread(obd);
1789 target_cleanup_recovery(obd);
1791 EXPORT_SYMBOL(target_recovery_fini);
1793 static void target_recovery_expired(unsigned long castmeharder)
1795 struct obd_device *obd = (struct obd_device *)castmeharder;
1796 LCONSOLE_WARN("%s: recovery timed out; %d clients never reconnected "
1797 "after %lds (%d clients did)\n",
1798 obd->obd_name, obd->obd_recoverable_clients,
1799 cfs_time_current_sec()- obd->obd_recovery_start,
1800 obd->obd_connected_clients);
1801 spin_lock_bh(&obd->obd_processing_task_lock);
1802 if (obd->obd_recovering)
1803 obd->obd_abort_recovery = 1;
1804 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1805 spin_unlock_bh(&obd->obd_processing_task_lock);
1808 void target_recovery_init(struct obd_device *obd, svc_handler_t handler)
1810 if (obd->obd_max_recoverable_clients == 0)
1813 CWARN("RECOVERY: service %s, %d recoverable clients, "
1814 "last_transno "LPU64"\n", obd->obd_name,
1815 obd->obd_max_recoverable_clients, obd->obd_last_committed);
1816 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
1817 obd->obd_recovery_start = 0;
1818 obd->obd_recovery_end = 0;
1819 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1820 /* bz13079: this should be set to desired value for ost but not for mds */
1821 obd->obd_recovery_max_time = OBD_RECOVERY_MAX_TIME;
1822 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
1823 target_start_recovery_thread(obd, handler);
1825 EXPORT_SYMBOL(target_recovery_init);
1829 int target_process_req_flags(struct obd_device *obd, struct ptlrpc_request *req)
1831 struct obd_export *exp = req->rq_export;
1832 LASSERT(exp != NULL);
1833 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1834 /* client declares he's ready to replay locks */
1835 spin_lock_bh(&obd->obd_processing_task_lock);
1836 if (exp->exp_req_replay_needed) {
1837 LASSERT(atomic_read(&obd->obd_req_replay_clients) > 0);
1838 spin_lock(&exp->exp_lock);
1839 exp->exp_req_replay_needed = 0;
1840 spin_unlock(&exp->exp_lock);
1841 atomic_dec(&obd->obd_req_replay_clients);
1842 LASSERT(obd->obd_recoverable_clients > 0);
1843 obd->obd_recoverable_clients--;
1844 if (atomic_read(&obd->obd_req_replay_clients) == 0)
1845 CDEBUG(D_HA, "all clients have replayed reqs\n");
1846 wake_up(&obd->obd_next_transno_waitq);
1848 spin_unlock_bh(&obd->obd_processing_task_lock);
1850 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1851 /* client declares he's ready to complete recovery
1852 * so, we put the request on th final queue */
1853 spin_lock_bh(&obd->obd_processing_task_lock);
1854 if (exp->exp_lock_replay_needed) {
1855 LASSERT(atomic_read(&obd->obd_lock_replay_clients) > 0);
1856 spin_lock(&exp->exp_lock);
1857 exp->exp_lock_replay_needed = 0;
1858 spin_unlock(&exp->exp_lock);
1859 atomic_dec(&obd->obd_lock_replay_clients);
1860 if (atomic_read(&obd->obd_lock_replay_clients) == 0)
1861 CDEBUG(D_HA, "all clients have replayed locks\n");
1862 wake_up(&obd->obd_next_transno_waitq);
1864 spin_unlock_bh(&obd->obd_processing_task_lock);
1870 int target_queue_recovery_request(struct ptlrpc_request *req,
1871 struct obd_device *obd)
1873 struct list_head *tmp;
1875 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1879 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
1880 /* Processing the queue right now, don't re-add. */
1884 target_process_req_flags(obd, req);
1886 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1887 /* client declares he's ready to complete recovery
1888 * so, we put the request on th final queue */
1889 req = ptlrpc_clone_req(req);
1892 DEBUG_REQ(D_HA, req, "queue final req");
1893 spin_lock_bh(&obd->obd_processing_task_lock);
1894 if (obd->obd_recovering)
1895 list_add_tail(&req->rq_list, &obd->obd_final_req_queue);
1897 spin_unlock_bh(&obd->obd_processing_task_lock);
1898 ptlrpc_free_clone(req);
1899 if (obd->obd_stopping) {
1905 spin_unlock_bh(&obd->obd_processing_task_lock);
1908 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1909 /* client declares he's ready to replay locks */
1910 req = ptlrpc_clone_req(req);
1913 DEBUG_REQ(D_HA, req, "queue lock replay req");
1914 spin_lock_bh(&obd->obd_processing_task_lock);
1915 LASSERT(obd->obd_recovering);
1916 /* usually due to recovery abort */
1917 if (!req->rq_export->exp_in_recovery) {
1918 spin_unlock_bh(&obd->obd_processing_task_lock);
1919 ptlrpc_free_clone(req);
1922 LASSERT(req->rq_export->exp_lock_replay_needed);
1923 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
1924 spin_unlock_bh(&obd->obd_processing_task_lock);
1925 wake_up(&obd->obd_next_transno_waitq);
1929 /* CAVEAT EMPTOR: The incoming request message has been swabbed
1930 * (i.e. buflens etc are in my own byte order), but type-dependent
1931 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
1934 CFS_INIT_LIST_HEAD(&req->rq_list);
1935 DEBUG_REQ(D_HA, req, "not queueing");
1939 spin_lock_bh(&obd->obd_processing_task_lock);
1941 /* If we're processing the queue, we want don't want to queue this
1944 * Also, if this request has a transno less than the one we're waiting
1945 * for, we should process it now. It could (and currently always will)
1946 * be an open request for a descriptor that was opened some time ago.
1948 * Also, a resent, replayed request that has already been
1949 * handled will pass through here and be processed immediately.
1951 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying: %i\n",
1952 obd->obd_next_recovery_transno, transno, obd->obd_req_replaying);
1953 if (transno < obd->obd_next_recovery_transno && obd->obd_req_replaying) {
1954 /* Processing the queue right now, don't re-add. */
1955 LASSERT(list_empty(&req->rq_list));
1956 spin_unlock_bh(&obd->obd_processing_task_lock);
1959 spin_unlock_bh(&obd->obd_processing_task_lock);
1961 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
1964 req = ptlrpc_clone_req(req);
1968 spin_lock_bh(&obd->obd_processing_task_lock);
1969 LASSERT(obd->obd_recovering);
1970 if (!req->rq_export->exp_in_recovery) {
1971 spin_unlock_bh(&obd->obd_processing_task_lock);
1972 ptlrpc_free_clone(req);
1975 LASSERT(req->rq_export->exp_req_replay_needed);
1977 if (target_exp_enqueue_req_replay(req)) {
1978 spin_unlock_bh(&obd->obd_processing_task_lock);
1979 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
1980 ptlrpc_free_clone(req);
1985 list_for_each(tmp, &obd->obd_req_replay_queue) {
1986 struct ptlrpc_request *reqiter =
1987 list_entry(tmp, struct ptlrpc_request, rq_list);
1989 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
1990 list_add_tail(&req->rq_list, &reqiter->rq_list);
1995 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
1997 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
1998 "has been claimed by another client");
1999 spin_unlock_bh(&obd->obd_processing_task_lock);
2000 target_exp_dequeue_req_replay(req);
2001 ptlrpc_free_clone(req);
2007 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2009 obd->obd_requests_queued_for_recovery++;
2010 wake_up(&obd->obd_next_transno_waitq);
2011 spin_unlock_bh(&obd->obd_processing_task_lock);
2015 struct obd_device * target_req2obd(struct ptlrpc_request *req)
2017 return req->rq_export->exp_obd;
2020 static inline struct ldlm_pool *ldlm_exp2pl(struct obd_export *exp)
2022 LASSERT(exp != NULL);
2023 return &exp->exp_obd->obd_namespace->ns_pool;
2027 * Packs current SLV and Limit into \a req.
2029 int target_pack_pool_reply(struct ptlrpc_request *req)
2031 struct obd_device *obd;
2035 * Check that we still have all structures alive as this may
2036 * be some late rpc in shutdown time.
2038 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2039 !exp_connect_lru_resize(req->rq_export))) {
2040 lustre_msg_set_slv(req->rq_repmsg, 0);
2041 lustre_msg_set_limit(req->rq_repmsg, 0);
2046 * OBD is alive here as export is alive, which we checked above.
2048 obd = req->rq_export->exp_obd;
2050 read_lock(&obd->obd_pool_lock);
2051 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2052 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2053 read_unlock(&obd->obd_pool_lock);
2058 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2060 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2061 DEBUG_REQ(D_ERROR, req, "dropping reply");
2066 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
2067 req->rq_status = rc;
2068 return (ptlrpc_send_error(req, 1));
2070 DEBUG_REQ(D_NET, req, "sending reply");
2073 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2076 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2079 struct ptlrpc_reply_state *rs;
2080 struct obd_device *obd;
2081 struct obd_export *exp;
2082 struct ptlrpc_service *svc;
2085 if (req->rq_no_reply) {
2090 svc = req->rq_rqbd->rqbd_service;
2091 rs = req->rq_reply_state;
2092 if (rs == NULL || !rs->rs_difficult) {
2094 target_send_reply_msg (req, rc, fail_id);
2099 /* must be an export if locks saved */
2100 LASSERT (req->rq_export != NULL);
2101 /* req/reply consistent */
2102 LASSERT (rs->rs_service == svc);
2105 LASSERT (!rs->rs_scheduled);
2106 LASSERT (!rs->rs_scheduled_ever);
2107 LASSERT (!rs->rs_handled);
2108 LASSERT (!rs->rs_on_net);
2109 LASSERT (rs->rs_export == NULL);
2110 LASSERT (list_empty(&rs->rs_obd_list));
2111 LASSERT (list_empty(&rs->rs_exp_list));
2113 exp = class_export_get (req->rq_export);
2116 /* disable reply scheduling onto srv_reply_queue while I'm setting up */
2117 rs->rs_scheduled = 1;
2119 rs->rs_xid = req->rq_xid;
2120 rs->rs_transno = req->rq_transno;
2121 rs->rs_export = exp;
2123 spin_lock(&obd->obd_uncommitted_replies_lock);
2125 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2126 rs->rs_transno, obd->obd_last_committed);
2127 if (rs->rs_transno > obd->obd_last_committed) {
2128 /* not committed already */
2129 list_add_tail (&rs->rs_obd_list,
2130 &obd->obd_uncommitted_replies);
2133 spin_unlock (&obd->obd_uncommitted_replies_lock);
2134 spin_lock (&exp->exp_lock);
2136 list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies);
2138 spin_unlock(&exp->exp_lock);
2140 netrc = target_send_reply_msg (req, rc, fail_id);
2142 spin_lock(&svc->srv_lock);
2144 svc->srv_n_difficult_replies++;
2147 /* error sending: reply is off the net. Also we need +1
2148 * reply ref until ptlrpc_server_handle_reply() is done
2149 * with the reply state (if the send was successful, there
2150 * would have been +1 ref for the net, which
2151 * reply_out_callback leaves alone) */
2153 ptlrpc_rs_addref(rs);
2154 atomic_inc (&svc->srv_outstanding_replies);
2157 if (rs->rs_transno <= obd->obd_last_committed ||
2158 (!rs->rs_on_net && !rs->rs_no_ack) ||
2159 list_empty(&rs->rs_exp_list) || /* completed already */
2160 list_empty(&rs->rs_obd_list)) {
2161 CDEBUG(D_HA, "Schedule reply immediately\n");
2162 list_add_tail (&rs->rs_list, &svc->srv_reply_queue);
2163 cfs_waitq_signal (&svc->srv_waitq);
2165 list_add (&rs->rs_list, &svc->srv_active_replies);
2166 rs->rs_scheduled = 0; /* allow notifier to schedule */
2169 spin_unlock(&svc->srv_lock);
2173 int target_handle_ping(struct ptlrpc_request *req)
2175 obd_ping(req->rq_export);
2176 return req_capsule_server_pack(&req->rq_pill);
2179 void target_committed_to_req(struct ptlrpc_request *req)
2181 struct obd_device *obd;
2183 if (req == NULL || req->rq_export == NULL)
2186 obd = req->rq_export->exp_obd;
2190 if (!obd->obd_no_transno && req->rq_repmsg != NULL)
2191 lustre_msg_set_last_committed(req->rq_repmsg,
2192 obd->obd_last_committed);
2194 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2195 "%d)", obd->obd_no_transno, req->rq_repmsg == NULL);
2197 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2198 obd->obd_last_committed, req->rq_transno, req->rq_xid);
2201 EXPORT_SYMBOL(target_committed_to_req);
2203 int target_handle_qc_callback(struct ptlrpc_request *req)
2205 struct obd_quotactl *oqctl;
2206 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2208 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2209 if (oqctl == NULL) {
2210 CERROR("Can't unpack obd_quotactl\n");
2214 cli->cl_qchk_stat = oqctl->qc_stat;
2219 #ifdef HAVE_QUOTA_SUPPORT
2220 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2223 struct obd_device *obd = req->rq_export->exp_obd;
2224 struct obd_device *master_obd;
2225 struct obd_device_target *obt;
2226 struct lustre_quota_ctxt *qctxt;
2227 struct qunit_data *qdata = NULL;
2231 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2234 rc = req_capsule_server_pack(&req->rq_pill);
2236 CERROR("packing reply failed!: rc = %d\n", rc);
2240 LASSERT(req->rq_export);
2242 OBD_ALLOC(qdata, sizeof(struct qunit_data));
2245 rc = quota_get_qdata(req, qdata, QUOTA_REQUEST, QUOTA_EXPORT);
2247 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2251 /* we use the observer */
2252 if (!obd->obd_observer || !obd->obd_observer->obd_observer) {
2253 CERROR("Can't find the observer, it is recovering\n");
2254 req->rq_status = -EAGAIN;
2255 GOTO(send_reply, rc = -EAGAIN);
2258 master_obd = obd->obd_observer->obd_observer;
2259 obt = &master_obd->u.obt;
2260 qctxt = &obt->obt_qctxt;
2262 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2263 /* quota_type has not been processed yet, return EAGAIN
2264 * until we know whether or not quotas are supposed to
2266 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2268 req->rq_status = -EAGAIN;
2269 rc = ptlrpc_reply(req);
2273 down_read(&obt->obt_rwsem);
2274 if (qctxt->lqc_lqs_hash == NULL) {
2275 up_read(&obt->obt_rwsem);
2276 /* quota_type has not been processed yet, return EAGAIN
2277 * until we know whether or not quotas are supposed to
2279 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2281 req->rq_status = -EAGAIN;
2282 rc = ptlrpc_reply(req);
2286 LASSERT(qctxt->lqc_handler);
2287 rc = qctxt->lqc_handler(master_obd, qdata,
2288 lustre_msg_get_opc(req->rq_reqmsg));
2289 up_read(&obt->obt_rwsem);
2290 if (rc && rc != -EDQUOT)
2291 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2292 "dqacq failed! (rc:%d)\n", rc);
2293 req->rq_status = rc;
2295 /* there are three forms of qunit(historic causes), so we need to
2296 * adjust the same form to different forms slaves needed */
2297 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2299 CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc);
2303 /* Block the quota req. b=14840 */
2304 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2306 rc = ptlrpc_reply(req);
2308 OBD_FREE(qdata, sizeof(struct qunit_data));
2312 #endif /* !__KERNEL__ */
2314 #endif /* HAVE_QUOTA_SUPPORT */
2316 ldlm_mode_t lck_compat_array[] = {
2317 [LCK_EX] LCK_COMPAT_EX,
2318 [LCK_PW] LCK_COMPAT_PW,
2319 [LCK_PR] LCK_COMPAT_PR,
2320 [LCK_CW] LCK_COMPAT_CW,
2321 [LCK_CR] LCK_COMPAT_CR,
2322 [LCK_NL] LCK_COMPAT_NL,
2323 [LCK_GROUP] LCK_COMPAT_GROUP,
2324 [LCK_COS] LCK_COMPAT_COS,
2328 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2329 * not escape to the user level.
2331 int ldlm_error2errno(ldlm_error_t error)
2339 case ELDLM_LOCK_CHANGED:
2342 case ELDLM_LOCK_ABORTED:
2345 case ELDLM_LOCK_REPLACED:
2348 case ELDLM_NO_LOCK_DATA:
2351 case ELDLM_NAMESPACE_EXISTS:
2354 case ELDLM_BAD_NAMESPACE:
2358 if (((int)error) < 0) /* cast to signed type */
2359 result = error; /* as ldlm_error_t can be unsigned */
2361 CERROR("Invalid DLM result code: %i\n", error);
2367 EXPORT_SYMBOL(ldlm_error2errno);
2370 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2372 ldlm_error_t ldlm_errno2error(int err_no)
2381 error = ELDLM_LOCK_CHANGED;
2384 error = ELDLM_LOCK_ABORTED;
2387 error = ELDLM_LOCK_REPLACED;
2390 error = ELDLM_NO_LOCK_DATA;
2393 error = ELDLM_NAMESPACE_EXISTS;
2396 error = ELDLM_BAD_NAMESPACE;
2403 EXPORT_SYMBOL(ldlm_errno2error);