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 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
225 rq_portal = MDS_REQUEST_PORTAL;
226 rp_portal = MDC_REPLY_PORTAL;
227 connect_op = MDS_CONNECT;
228 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
229 rq_portal = MGS_REQUEST_PORTAL;
230 rp_portal = MGC_REPLY_PORTAL;
231 connect_op = MGS_CONNECT;
233 CERROR("unknown client OBD type \"%s\", can't setup\n",
238 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
239 CERROR("requires a TARGET UUID\n");
243 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
244 CERROR("client UUID must be less than 38 characters\n");
248 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
249 CERROR("setup requires a SERVER UUID\n");
253 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
254 CERROR("target UUID must be less than 38 characters\n");
258 init_rwsem(&cli->cl_sem);
259 sema_init(&cli->cl_mgc_sem, 1);
260 sptlrpc_rule_set_init(&cli->cl_sptlrpc_rset);
261 cli->cl_sec_part = LUSTRE_SP_ANY;
262 cli->cl_conn_count = 0;
263 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
264 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
265 sizeof(server_uuid)));
268 cli->cl_avail_grant = 0;
269 /* FIXME: should limit this for the sum of all cl_dirty_max */
270 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
271 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > num_physpages / 8)
272 cli->cl_dirty_max = num_physpages << (CFS_PAGE_SHIFT - 3);
273 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
274 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
275 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
276 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
277 client_obd_list_lock_init(&cli->cl_loi_list_lock);
278 cli->cl_r_in_flight = 0;
279 cli->cl_w_in_flight = 0;
281 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
282 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
283 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
284 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
285 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
286 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
287 cfs_waitq_init(&cli->cl_destroy_waitq);
288 atomic_set(&cli->cl_destroy_in_flight, 0);
289 #ifdef ENABLE_CHECKSUM
290 /* Turn on checksumming by default. */
291 cli->cl_checksum = 1;
293 * The supported checksum types will be worked out at connect time
294 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
297 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
299 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
301 /* This value may be changed at connect time in
302 ptlrpc_connect_interpret. */
303 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
304 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
306 if (!strcmp(name, LUSTRE_MDC_NAME)) {
307 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
308 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
309 cli->cl_max_rpcs_in_flight = 2;
310 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
311 cli->cl_max_rpcs_in_flight = 3;
312 } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
313 cli->cl_max_rpcs_in_flight = 4;
315 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
320 CERROR("ldlm_get_ref failed: %d\n", rc);
324 ptlrpc_init_client(rq_portal, rp_portal, name,
325 &obddev->obd_ldlm_client);
327 imp = class_new_import(obddev);
329 GOTO(err_ldlm, rc = -ENOENT);
330 imp->imp_client = &obddev->obd_ldlm_client;
331 imp->imp_connect_op = connect_op;
332 imp->imp_initial_recov = 1;
333 imp->imp_initial_recov_bk = 0;
334 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
335 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
336 LUSTRE_CFG_BUFLEN(lcfg, 1));
337 class_import_put(imp);
339 rc = client_import_add_conn(imp, &server_uuid, 1);
341 CERROR("can't add initial connection\n");
342 GOTO(err_import, rc);
345 cli->cl_import = imp;
346 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
347 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
348 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
350 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
351 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
352 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
353 name, obddev->obd_name,
354 cli->cl_target_uuid.uuid);
355 spin_lock(&imp->imp_lock);
356 imp->imp_invalid = 1;
357 spin_unlock(&imp->imp_lock);
361 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
366 class_destroy_import(imp);
374 int client_obd_cleanup(struct obd_device *obddev)
377 sptlrpc_rule_set_free(&obddev->u.cli.cl_sptlrpc_rset);
382 /* ->o_connect() method for client side (OSC and MDC and MGC) */
383 int client_connect_import(const struct lu_env *env,
384 struct lustre_handle *dlm_handle,
385 struct obd_device *obd, struct obd_uuid *cluuid,
386 struct obd_connect_data *data, void *localdata)
388 struct client_obd *cli = &obd->u.cli;
389 struct obd_import *imp = cli->cl_import;
390 struct obd_export *exp;
391 struct obd_connect_data *ocd;
392 struct ldlm_namespace *to_be_freed = NULL;
396 down_write(&cli->cl_sem);
397 rc = class_connect(dlm_handle, obd, cluuid);
401 cli->cl_conn_count++;
402 if (cli->cl_conn_count > 1)
404 exp = class_conn2export(dlm_handle);
406 if (obd->obd_namespace != NULL)
407 CERROR("already have namespace!\n");
408 obd->obd_namespace = ldlm_namespace_new(obd, obd->obd_name,
409 LDLM_NAMESPACE_CLIENT,
410 LDLM_NAMESPACE_GREEDY);
411 if (obd->obd_namespace == NULL)
412 GOTO(out_disco, rc = -ENOMEM);
414 imp->imp_dlm_handle = *dlm_handle;
415 rc = ptlrpc_init_import(imp);
419 ocd = &imp->imp_connect_data;
422 imp->imp_connect_flags_orig = data->ocd_connect_flags;
425 rc = ptlrpc_connect_import(imp, NULL);
427 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
430 LASSERT(exp->exp_connection);
433 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
434 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
435 data->ocd_connect_flags, ocd->ocd_connect_flags);
436 data->ocd_connect_flags = ocd->ocd_connect_flags;
439 ptlrpc_pinger_add_import(imp);
445 ldlm_namespace_free_prior(obd->obd_namespace, imp, 0);
446 to_be_freed = obd->obd_namespace;
447 obd->obd_namespace = NULL;
449 cli->cl_conn_count--;
450 class_disconnect(exp);
452 class_export_put(exp);
455 up_write(&cli->cl_sem);
457 ldlm_namespace_free_post(to_be_freed);
462 int client_disconnect_export(struct obd_export *exp)
464 struct obd_device *obd = class_exp2obd(exp);
465 struct client_obd *cli;
466 struct obd_import *imp;
468 struct ldlm_namespace *to_be_freed = NULL;
472 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
473 exp, exp ? exp->exp_handle.h_cookie : -1);
478 imp = cli->cl_import;
480 down_write(&cli->cl_sem);
481 if (!cli->cl_conn_count) {
482 CERROR("disconnecting disconnected device (%s)\n",
484 GOTO(out_sem, rc = -EINVAL);
487 cli->cl_conn_count--;
488 if (cli->cl_conn_count)
489 GOTO(out_no_disconnect, rc = 0);
491 /* Mark import deactivated now, so we don't try to reconnect if any
492 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
493 * fully deactivate the import, or that would drop all requests. */
494 spin_lock(&imp->imp_lock);
495 imp->imp_deactive = 1;
496 spin_unlock(&imp->imp_lock);
498 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
499 * delete it regardless. (It's safe to delete an import that was
501 (void)ptlrpc_pinger_del_import(imp);
503 if (obd->obd_namespace != NULL) {
504 /* obd_force == local only */
505 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
506 obd->obd_force ? LDLM_FL_LOCAL_ONLY:0,
508 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
509 to_be_freed = obd->obd_namespace;
512 rc = ptlrpc_disconnect_import(imp, 0);
514 ptlrpc_invalidate_import(imp);
515 /* set obd_namespace to NULL only after invalidate, because we can have
516 * some connect requests in flight, and his need store a connect flags
517 * in obd_namespace. bug 14260 */
518 obd->obd_namespace = NULL;
520 if (imp->imp_rq_pool) {
521 ptlrpc_free_rq_pool(imp->imp_rq_pool);
522 imp->imp_rq_pool = NULL;
525 cli->cl_import = NULL;
529 err = class_disconnect(exp);
533 up_write(&cli->cl_sem);
535 ldlm_namespace_free_post(to_be_freed);
540 /* --------------------------------------------------------------------------
541 * from old lib/target.c
542 * -------------------------------------------------------------------------- */
544 int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
545 struct obd_uuid *cluuid, int initial_conn)
548 if (exp->exp_connection && exp->exp_imp_reverse && !initial_conn) {
549 struct lustre_handle *hdl;
550 hdl = &exp->exp_imp_reverse->imp_remote_handle;
551 /* Might be a re-connect after a partition. */
552 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
553 CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name,
555 conn->cookie = exp->exp_handle.h_cookie;
556 /* target_handle_connect() treats EALREADY and
557 * -EALREADY differently. EALREADY means we are
558 * doing a valid reconnect from the same client. */
561 CERROR("%s reconnecting from %s, "
562 "handle mismatch (ours "LPX64", theirs "
563 LPX64")\n", cluuid->uuid,
564 exp->exp_connection->c_remote_uuid.uuid,
565 hdl->cookie, conn->cookie);
566 memset(conn, 0, sizeof *conn);
567 /* target_handle_connect() treats EALREADY and
568 * -EALREADY differently. -EALREADY is an error
569 * (same UUID, different handle). */
574 conn->cookie = exp->exp_handle.h_cookie;
575 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
576 cluuid->uuid, exp, conn->cookie);
580 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
583 struct obd_export *exp = cb_data;
585 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
586 obd->obd_name, exp->exp_client_uuid.uuid);
588 spin_lock(&exp->exp_lock);
589 exp->exp_need_sync = 0;
590 spin_unlock(&exp->exp_lock);
592 EXPORT_SYMBOL(target_client_add_cb);
594 target_start_and_reset_recovery_timer(struct obd_device *obd,
595 struct ptlrpc_request *req,
598 int target_handle_connect(struct ptlrpc_request *req)
600 struct obd_device *target, *targref = NULL;
601 struct obd_export *export = NULL;
602 struct obd_import *revimp;
603 struct lustre_handle conn;
604 struct lustre_handle *tmp;
605 struct obd_uuid tgtuuid;
606 struct obd_uuid cluuid;
607 struct obd_uuid remote_uuid;
610 int initial_conn = 0;
611 struct obd_connect_data *data, *tmpdata;
612 lnet_nid_t *client_nid = NULL;
615 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
617 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
619 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
620 GOTO(out, rc = -EINVAL);
623 obd_str2uuid(&tgtuuid, str);
624 target = class_uuid2obd(&tgtuuid);
626 target = class_name2obd(str);
628 if (!target || target->obd_stopping || !target->obd_set_up) {
629 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available "
630 " for connect (%s)\n", str,
631 !target ? "no target" :
632 (target->obd_stopping ? "stopping" :
634 GOTO(out, rc = -ENODEV);
637 if (target->obd_no_conn) {
638 LCONSOLE_WARN("%s: temporarily refusing client connection "
639 "from %s\n", target->obd_name,
640 libcfs_nid2str(req->rq_peer.nid));
641 GOTO(out, rc = -EAGAIN);
644 /* Make sure the target isn't cleaned up while we're here. Yes,
645 there's still a race between the above check and our incref here.
646 Really, class_uuid2obd should take the ref. */
647 targref = class_incref(target, __FUNCTION__, cfs_current());
650 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
652 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
653 GOTO(out, rc = -EINVAL);
656 obd_str2uuid(&cluuid, str);
658 /* XXX extract a nettype and format accordingly */
659 switch (sizeof(lnet_nid_t)) {
660 /* NB the casts only avoid compiler warnings */
662 snprintf(remote_uuid.uuid, sizeof remote_uuid,
663 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
666 snprintf(remote_uuid.uuid, sizeof remote_uuid,
667 "NET_%x_UUID", (__u32)req->rq_peer.nid);
673 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
675 GOTO(out, rc = -EPROTO);
679 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
681 GOTO(out, rc = -EPROTO);
683 rc = req_capsule_server_pack(&req->rq_pill);
687 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
689 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
690 "libclient connection attempt");
691 GOTO(out, rc = -EPROTO);
692 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
693 LUSTRE_VERSION_ALLOWED_OFFSET ||
694 data->ocd_version > LUSTRE_VERSION_CODE +
695 LUSTRE_VERSION_ALLOWED_OFFSET) {
696 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
697 "libclient connection attempt",
698 data->ocd_version < LUSTRE_VERSION_CODE ?
700 OBD_OCD_VERSION_MAJOR(data->ocd_version),
701 OBD_OCD_VERSION_MINOR(data->ocd_version),
702 OBD_OCD_VERSION_PATCH(data->ocd_version),
703 OBD_OCD_VERSION_FIX(data->ocd_version));
704 data = req_capsule_server_sized_get(&req->rq_pill,
706 offsetof(typeof(*data), ocd_version) +
707 sizeof(data->ocd_version));
709 data->ocd_connect_flags = OBD_CONNECT_VERSION;
710 data->ocd_version = LUSTRE_VERSION_CODE;
712 GOTO(out, rc = -EPROTO);
716 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)
719 /* lctl gets a backstage, all-access pass. */
720 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
721 goto dont_check_exports;
723 spin_lock(&target->obd_dev_lock);
724 export = lustre_hash_lookup(target->obd_uuid_hash, &cluuid);
726 if (export != NULL && export->exp_connecting) { /* bug 9635, et. al. */
727 CWARN("%s: exp %p already connecting\n",
728 export->exp_obd->obd_name, export);
729 class_export_put(export);
732 } else if (export != NULL && export->exp_connection != NULL &&
733 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
734 /* make darn sure this is coming from the same peer
735 * if the UUIDs matched */
736 CWARN("%s: cookie %s seen on new NID %s when "
737 "existing NID %s is already connected\n",
738 target->obd_name, cluuid.uuid,
739 libcfs_nid2str(req->rq_peer.nid),
740 libcfs_nid2str(export->exp_connection->c_peer.nid));
741 class_export_put(export);
744 } else if (export != NULL) {
745 spin_lock(&export->exp_lock);
746 export->exp_connecting = 1;
747 spin_unlock(&export->exp_lock);
748 class_export_put(export);
749 spin_unlock(&target->obd_dev_lock);
750 LASSERT(export->exp_obd == target);
752 rc = target_handle_reconnect(&conn, export, &cluuid, initial_conn);
755 /* If we found an export, we already unlocked. */
757 spin_unlock(&target->obd_dev_lock);
758 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
759 } else if (req->rq_export == NULL &&
760 atomic_read(&export->exp_rpc_count) > 0) {
761 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
762 target->obd_name, cluuid.uuid,
763 libcfs_nid2str(req->rq_peer.nid),
764 export, atomic_read(&export->exp_refcount));
765 GOTO(out, rc = -EBUSY);
766 } else if (req->rq_export != NULL &&
767 (atomic_read(&export->exp_rpc_count) > 1)) {
768 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
769 target->obd_name, cluuid.uuid,
770 libcfs_nid2str(req->rq_peer.nid),
771 export, atomic_read(&export->exp_rpc_count));
772 GOTO(out, rc = -EBUSY);
773 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1 &&
775 CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; "
776 "cookies not random?\n", target->obd_name,
777 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid);
778 GOTO(out, rc = -EALREADY);
780 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
781 if (req->rq_export == NULL && initial_conn)
782 export->exp_last_request_time =
783 max(export->exp_last_request_time,
784 (time_t)cfs_time_current_sec());
791 CWARN("%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
792 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
793 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
794 export, (long)cfs_time_current_sec(),
795 export ? (long)export->exp_last_request_time : 0);
797 /* Tell the client if we're in recovery. */
798 if (target->obd_recovering) {
799 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
800 /* If this is the first time a client connects,
801 reset the recovery timer */
803 target_start_and_reset_recovery_timer(target, req,
807 /* We want to handle EALREADY but *not* -EALREADY from
808 * target_handle_reconnect(), return reconnection state in a flag */
809 if (rc == EALREADY) {
810 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
816 /* Tell the client if we support replayable requests */
817 if (target->obd_replayable)
818 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
819 client_nid = &req->rq_peer.nid;
821 if (export == NULL) {
822 if (target->obd_recovering) {
825 t = cfs_timer_deadline(&target->obd_recovery_timer);
826 t = cfs_time_sub(t, cfs_time_current());
827 CERROR("%s: denying connection for new client %s (%s): "
828 "%d clients in recovery for "CFS_TIME_T"s\n",
830 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid,
831 target->obd_recoverable_clients,
832 cfs_duration_sec(t));
836 rc = obd_connect(req->rq_svc_thread->t_env,
837 &conn, target, &cluuid, data,
841 rc = obd_reconnect(req->rq_svc_thread->t_env,
842 export, target, &cluuid, data, client_nid);
846 /* Return only the parts of obd_connect_data that we understand, so the
847 * client knows that we don't understand the rest. */
849 tmpdata = req_capsule_server_get(&req->rq_pill,
851 //data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED;
855 /* If all else goes well, this is our RPC return code. */
858 lustre_msg_set_handle(req->rq_repmsg, &conn);
860 /* ownership of this export ref transfers to the request AFTER we
861 * drop any previous reference the request had, but we don't want
862 * that to go to zero before we get our new export reference. */
863 export = class_conn2export(&conn);
865 DEBUG_REQ(D_ERROR, req, "Missing export!");
866 GOTO(out, rc = -ENODEV);
869 /* If the client and the server are the same node, we will already
870 * have an export that really points to the client's DLM export,
871 * because we have a shared handles table.
873 * XXX this will go away when shaver stops sending the "connect" handle
874 * in the real "remote handle" field of the request --phik 24 Apr 2003
876 if (req->rq_export != NULL)
877 class_export_put(req->rq_export);
879 req->rq_export = export;
881 spin_lock(&export->exp_lock);
883 lustre_msg_set_conn_cnt(req->rq_repmsg, export->exp_conn_cnt + 1);
884 } else if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
885 spin_unlock(&export->exp_lock);
886 CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n",
887 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
888 export->exp_conn_cnt,
889 lustre_msg_get_conn_cnt(req->rq_reqmsg));
891 GOTO(out, rc = -EALREADY);
893 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
895 /* request from liblustre? Don't evict it for not pinging. */
896 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
897 export->exp_libclient = 1;
898 spin_unlock(&export->exp_lock);
900 spin_lock(&target->obd_dev_lock);
901 list_del_init(&export->exp_obd_chain_timed);
902 spin_unlock(&target->obd_dev_lock);
904 spin_unlock(&export->exp_lock);
907 if (export->exp_connection != NULL)
908 ptlrpc_connection_put(export->exp_connection);
909 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
912 if (hlist_unhashed(&export->exp_nid_hash)) {
913 lustre_hash_add_unique(export->exp_obd->obd_nid_hash,
914 &export->exp_connection->c_peer.nid,
915 &export->exp_nid_hash);
918 spin_lock_bh(&target->obd_processing_task_lock);
919 if (target->obd_recovering && !export->exp_in_recovery) {
920 spin_lock(&export->exp_lock);
921 export->exp_in_recovery = 1;
922 export->exp_req_replay_needed = 1;
923 export->exp_lock_replay_needed = 1;
924 spin_unlock(&export->exp_lock);
925 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
926 && (data->ocd_transno == 0))
927 CWARN("Connect with zero transno!\n");
929 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO)
930 && data->ocd_transno < target->obd_next_recovery_transno)
931 target->obd_next_recovery_transno = data->ocd_transno;
932 target->obd_connected_clients++;
933 /* each connected client is counted as recoverable */
934 target->obd_recoverable_clients++;
935 atomic_inc(&target->obd_req_replay_clients);
936 atomic_inc(&target->obd_lock_replay_clients);
937 if (target->obd_connected_clients ==
938 target->obd_max_recoverable_clients)
939 wake_up(&target->obd_next_transno_waitq);
941 spin_unlock_bh(&target->obd_processing_task_lock);
942 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
945 if (export->exp_imp_reverse != NULL) {
946 /* destroyed import can be still referenced in ctxt */
947 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
948 KEY_REVIMP_UPD, 0, NULL, NULL);
950 /* in some recovery senarios, previous ctx init rpc handled
951 * in sptlrpc_target_export_check() might be used to install
952 * a reverse ctx in this reverse import, and later OBD_CONNECT
953 * using the same gss ctx could reach here and following new
954 * reverse import. note all reverse ctx in new/old import are
955 * actually based on the same gss ctx. so we invalidate ctx
956 * here before destroy import, otherwise flush old import will
957 * lead to remote reverse ctx be destroied, thus the reverse
958 * ctx of new import will lost its peer.
959 * there might be a better way to deal with this???
961 sptlrpc_import_inval_all_ctx(export->exp_imp_reverse);
963 destroy_import(export->exp_imp_reverse);
966 /* for the rest part, we return -ENOTCONN in case of errors
967 * in order to let client initialize connection again.
969 revimp = export->exp_imp_reverse = class_new_import(target);
971 CERROR("fail to alloc new reverse import.\n");
972 GOTO(out, rc = -ENOTCONN);
975 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
976 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
977 revimp->imp_remote_handle = conn;
978 revimp->imp_dlm_fake = 1;
979 revimp->imp_state = LUSTRE_IMP_FULL;
981 /* unknown versions will be caught in
982 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
983 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
985 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
986 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
987 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
989 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
991 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx,
992 req->rq_flvr.sf_rpc);
994 CERROR("Failed to get sec for reverse import: %d\n", rc);
995 export->exp_imp_reverse = NULL;
996 class_destroy_import(revimp);
999 class_import_put(revimp);
1002 spin_lock(&export->exp_lock);
1003 export->exp_connecting = 0;
1004 spin_unlock(&export->exp_lock);
1007 class_decref(targref, __FUNCTION__, cfs_current());
1009 req->rq_status = rc;
1013 int target_handle_disconnect(struct ptlrpc_request *req)
1018 rc = req_capsule_server_pack(&req->rq_pill);
1022 /* keep the rq_export around so we can send the reply */
1023 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1028 void target_destroy_export(struct obd_export *exp)
1030 /* exports created from last_rcvd data, and "fake"
1031 exports created by lctl don't have an import */
1032 if (exp->exp_imp_reverse != NULL)
1033 destroy_import(exp->exp_imp_reverse);
1035 /* We cancel locks at disconnect time, but this will catch any locks
1036 * granted in a race with recovery-induced disconnect. */
1037 if (exp->exp_obd->obd_namespace != NULL)
1038 ldlm_cancel_locks_for_export(exp);
1042 * Recovery functions
1045 struct ptlrpc_request *ptlrpc_clone_req( struct ptlrpc_request *orig_req)
1047 struct ptlrpc_request *copy_req;
1048 struct lustre_msg *copy_reqmsg;
1049 struct ptlrpc_user_desc *udesc = NULL;
1051 OBD_ALLOC_PTR(copy_req);
1054 OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
1056 OBD_FREE_PTR(copy_req);
1060 if (orig_req->rq_user_desc) {
1061 int ngroups = orig_req->rq_user_desc->pud_ngroups;
1063 OBD_ALLOC(udesc, sptlrpc_user_desc_size(ngroups));
1065 OBD_FREE(copy_reqmsg, orig_req->rq_reqlen);
1066 OBD_FREE_PTR(copy_req);
1069 memcpy(udesc, orig_req->rq_user_desc,
1070 sptlrpc_user_desc_size(ngroups));
1073 *copy_req = *orig_req;
1074 memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
1075 copy_req->rq_reqmsg = copy_reqmsg;
1076 copy_req->rq_user_desc = udesc;
1078 class_export_rpc_get(copy_req->rq_export);
1079 CFS_INIT_LIST_HEAD(©_req->rq_list);
1080 CFS_INIT_LIST_HEAD(©_req->rq_replay_list);
1081 sptlrpc_svc_ctx_addref(copy_req);
1083 if (copy_req->rq_reply_state) {
1084 /* the copied req takes over the reply state */
1085 orig_req->rq_reply_state = NULL;
1086 /* to catch further access */
1087 orig_req->rq_repmsg = NULL;
1088 orig_req->rq_replen = 0;
1094 void ptlrpc_free_clone(struct ptlrpc_request *req)
1096 LASSERT(list_empty(&req->rq_replay_list));
1098 ptlrpc_req_drop_rs(req);
1099 sptlrpc_svc_ctx_decref(req);
1100 class_export_rpc_put(req->rq_export);
1101 list_del_init(&req->rq_list);
1103 if (req->rq_user_desc) {
1104 int ngroups = req->rq_user_desc->pud_ngroups;
1105 OBD_FREE(req->rq_user_desc, sptlrpc_user_desc_size(ngroups));
1107 OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
1111 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1113 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1114 struct obd_export *exp = req->rq_export;
1115 struct ptlrpc_request *reqiter;
1120 spin_lock(&exp->exp_lock);
1121 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1123 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1130 /* we expect it with RESENT and REPLAY flags */
1131 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1132 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1133 CERROR("invalid flags %x of resent replay\n",
1134 lustre_msg_get_flags(req->rq_reqmsg));
1136 list_add_tail(&req->rq_replay_list, &exp->exp_req_replay_queue);
1139 spin_unlock(&exp->exp_lock);
1143 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1145 LASSERT(!list_empty(&req->rq_replay_list));
1146 LASSERT(req->rq_export);
1148 spin_lock(&req->rq_export->exp_lock);
1149 list_del_init(&req->rq_replay_list);
1150 spin_unlock(&req->rq_export->exp_lock);
1154 static void target_finish_recovery(struct obd_device *obd)
1157 LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n",
1160 ldlm_reprocess_all_ns(obd->obd_namespace);
1161 spin_lock_bh(&obd->obd_processing_task_lock);
1162 if (list_empty(&obd->obd_req_replay_queue) &&
1163 list_empty(&obd->obd_lock_replay_queue) &&
1164 list_empty(&obd->obd_final_req_queue)) {
1165 obd->obd_processing_task = 0;
1167 CERROR("%s: Recovery queues ( %s%s%s) are empty\n",
1169 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1170 list_empty(&obd->obd_lock_replay_queue) ? "" : "lock ",
1171 list_empty(&obd->obd_final_req_queue) ? "" : "final ");
1172 spin_unlock_bh(&obd->obd_processing_task_lock);
1175 spin_unlock_bh(&obd->obd_processing_task_lock);
1177 /* when recovery finished, cleanup orphans on mds and ost */
1178 if (OBT(obd) && OBP(obd, postrecov)) {
1179 int rc = OBP(obd, postrecov)(obd);
1180 LCONSOLE_WARN("%s: recovery %s: rc %d\n", obd->obd_name,
1181 rc < 0 ? "failed" : "complete", rc);
1184 obd->obd_recovery_end = cfs_time_current_sec();
1188 static void abort_req_replay_queue(struct obd_device *obd)
1190 struct ptlrpc_request *req, *n;
1191 struct list_head abort_list;
1193 CFS_INIT_LIST_HEAD(&abort_list);
1194 spin_lock_bh(&obd->obd_processing_task_lock);
1195 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1196 spin_unlock_bh(&obd->obd_processing_task_lock);
1197 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1198 DEBUG_REQ(D_WARNING, req, "aborted:");
1199 req->rq_status = -ENOTCONN;
1200 if (ptlrpc_error(req)) {
1201 DEBUG_REQ(D_ERROR, req,
1202 "failed abort_req_reply; skipping");
1204 target_exp_dequeue_req_replay(req);
1205 ptlrpc_free_clone(req);
1209 static void abort_lock_replay_queue(struct obd_device *obd)
1211 struct ptlrpc_request *req, *n;
1212 struct list_head abort_list;
1214 CFS_INIT_LIST_HEAD(&abort_list);
1215 spin_lock_bh(&obd->obd_processing_task_lock);
1216 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1217 spin_unlock_bh(&obd->obd_processing_task_lock);
1218 list_for_each_entry_safe(req, n, &obd->obd_lock_replay_queue, rq_list){
1219 DEBUG_REQ(D_ERROR, req, "aborted:");
1220 req->rq_status = -ENOTCONN;
1221 if (ptlrpc_error(req)) {
1222 DEBUG_REQ(D_ERROR, req,
1223 "failed abort_lock_reply; skipping");
1225 ptlrpc_free_clone(req);
1230 /* Called from a cleanup function if the device is being cleaned up
1231 forcefully. The exports should all have been disconnected already,
1232 the only thing left to do is
1233 - clear the recovery flags
1235 - free queued requests and replies, but don't send replies
1236 Because the obd_stopping flag is set, no new requests should be received.
1239 void target_cleanup_recovery(struct obd_device *obd)
1241 struct ptlrpc_request *req, *n;
1242 struct list_head clean_list;
1245 LASSERT(obd->obd_stopping);
1247 CFS_INIT_LIST_HEAD(&clean_list);
1248 spin_lock_bh(&obd->obd_processing_task_lock);
1249 if (!obd->obd_recovering) {
1250 spin_unlock_bh(&obd->obd_processing_task_lock);
1254 obd->obd_recovering = obd->obd_abort_recovery = 0;
1255 target_cancel_recovery_timer(obd);
1257 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1258 spin_unlock_bh(&obd->obd_processing_task_lock);
1260 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1261 LASSERT(req->rq_reply_state == 0);
1262 target_exp_dequeue_req_replay(req);
1263 ptlrpc_free_clone(req);
1266 spin_lock_bh(&obd->obd_processing_task_lock);
1267 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1268 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1269 spin_unlock_bh(&obd->obd_processing_task_lock);
1271 list_for_each_entry_safe(req, n, &clean_list, rq_list){
1272 LASSERT(req->rq_reply_state == 0);
1273 ptlrpc_free_clone(req);
1279 /* obd_processing_task_lock should be held */
1280 void target_cancel_recovery_timer(struct obd_device *obd)
1282 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1283 cfs_timer_disarm(&obd->obd_recovery_timer);
1286 /* extend = 1 means require at least "duration" seconds left in the timer,
1287 extend = 0 means set the total duration (start_recovery_timer) */
1288 static void reset_recovery_timer(struct obd_device *obd, int duration,
1291 cfs_time_t now = cfs_time_current_sec();
1292 cfs_duration_t left;
1294 spin_lock_bh(&obd->obd_processing_task_lock);
1295 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1296 spin_unlock_bh(&obd->obd_processing_task_lock);
1300 left = cfs_time_sub(obd->obd_recovery_end, now);
1302 if (extend && (duration > left))
1303 obd->obd_recovery_timeout += duration - left;
1304 else if (!extend && (duration > obd->obd_recovery_timeout))
1305 /* Track the client's largest expected replay time */
1306 obd->obd_recovery_timeout = duration;
1309 * If total recovery time already exceed the
1310 * obd_recovery_max_time, then CRAY XT3 will
1311 * abort the recovery
1313 if(obd->obd_recovery_timeout > obd->obd_recovery_max_time)
1314 obd->obd_recovery_timeout = obd->obd_recovery_max_time;
1316 obd->obd_recovery_end = obd->obd_recovery_start +
1317 obd->obd_recovery_timeout;
1318 if (!cfs_timer_is_armed(&obd->obd_recovery_timer) ||
1319 cfs_time_before(now, obd->obd_recovery_end)) {
1320 left = cfs_time_sub(obd->obd_recovery_end, now);
1321 cfs_timer_arm(&obd->obd_recovery_timer, cfs_time_shift(left));
1323 spin_unlock_bh(&obd->obd_processing_task_lock);
1324 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1325 obd->obd_name, (unsigned)left);
1328 static void check_and_start_recovery_timer(struct obd_device *obd)
1330 spin_lock_bh(&obd->obd_processing_task_lock);
1331 if (cfs_timer_is_armed(&obd->obd_recovery_timer)) {
1332 spin_unlock_bh(&obd->obd_processing_task_lock);
1335 CWARN("%s: starting recovery timer\n", obd->obd_name);
1336 obd->obd_recovery_start = cfs_time_current_sec();
1338 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1339 spin_unlock_bh(&obd->obd_processing_task_lock);
1341 reset_recovery_timer(obd, obd->obd_recovery_timeout, 0);
1344 /* Reset the timer with each new client connection */
1346 * This timer is actually reconnect_timer, which is for making sure
1347 * the total recovery window is at least as big as my reconnect
1348 * attempt timing. So the initial recovery time_out will be set to
1349 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1350 * from client is bigger than this, then the recovery time_out will
1351 * be extend to make sure the client could be reconnected, in the
1352 * process, the timeout from the new client should be ignored.
1356 target_start_and_reset_recovery_timer(struct obd_device *obd,
1357 struct ptlrpc_request *req,
1360 int req_timeout = lustre_msg_get_timeout(req->rq_reqmsg);
1362 /* teach server about old server's estimates */
1364 at_add(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1365 at_timeout2est(req_timeout));
1367 check_and_start_recovery_timer(obd);
1369 req_timeout *= OBD_RECOVERY_FACTOR;
1370 if (req_timeout > obd->obd_recovery_timeout && !new_client)
1371 reset_recovery_timer(obd, req_timeout, 0);
1375 static int check_for_next_transno(struct obd_device *obd)
1377 struct ptlrpc_request *req = NULL;
1378 int wake_up = 0, connected, completed, queue_len, max;
1379 __u64 next_transno, req_transno;
1381 spin_lock_bh(&obd->obd_processing_task_lock);
1383 if (!list_empty(&obd->obd_req_replay_queue)) {
1384 req = list_entry(obd->obd_req_replay_queue.next,
1385 struct ptlrpc_request, rq_list);
1386 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1391 max = obd->obd_max_recoverable_clients;
1392 connected = obd->obd_connected_clients;
1393 completed = connected - obd->obd_recoverable_clients;
1394 queue_len = obd->obd_requests_queued_for_recovery;
1395 next_transno = obd->obd_next_recovery_transno;
1397 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1398 "req_transno: "LPU64", next_transno: "LPU64"\n",
1399 max, connected, completed, queue_len, req_transno, next_transno);
1401 if (obd->obd_abort_recovery) {
1402 CDEBUG(D_HA, "waking for aborted recovery\n");
1404 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1405 CDEBUG(D_HA, "waking for completed recovery\n");
1407 } else if (req_transno == next_transno) {
1408 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1410 } else if (queue_len + completed == max) {
1411 /* handle gaps occured due to lost reply. It is allowed gaps
1412 * because all clients are connected and there will be resend
1413 * for missed transaction */
1414 LASSERTF(req_transno >= next_transno,
1415 "req_transno: "LPU64", next_transno: "LPU64"\n",
1416 req_transno, next_transno);
1418 CDEBUG(req_transno > obd->obd_last_committed ? D_ERROR : D_HA,
1419 "waking for skipped transno (skip: "LPD64
1420 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
1421 next_transno, queue_len, completed, connected, req_transno);
1422 obd->obd_next_recovery_transno = req_transno;
1424 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1425 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1426 " by fail_lock, waking up ("LPD64")\n", next_transno);
1427 obd->obd_next_recovery_transno = req_transno;
1429 } else if (queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1430 /* some clients haven't connected in time, but we can try
1431 * to replay requests that demand on already committed ones
1432 * also, we can replay first non-committed transation */
1433 LASSERT(req_transno != 0);
1434 if (req_transno == obd->obd_last_committed + 1) {
1435 obd->obd_next_recovery_transno = req_transno;
1436 } else if (req_transno > obd->obd_last_committed) {
1437 /* can't continue recovery: have no needed transno */
1438 obd->obd_abort_recovery = 1;
1439 CDEBUG(D_ERROR, "abort due to missed clients. max: %d, "
1440 "connected: %d, completed: %d, queue_len: %d, "
1441 "req_transno: "LPU64", next_transno: "LPU64"\n",
1442 max, connected, completed, queue_len,
1443 req_transno, next_transno);
1448 spin_unlock_bh(&obd->obd_processing_task_lock);
1452 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1454 struct l_wait_info lwi = { 0 };
1455 struct ptlrpc_request *req;
1457 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1458 obd->obd_next_recovery_transno);
1459 l_wait_event(obd->obd_next_transno_waitq,
1460 check_for_next_transno(obd), &lwi);
1462 spin_lock_bh(&obd->obd_processing_task_lock);
1463 if (obd->obd_abort_recovery) {
1465 } else if (!list_empty(&obd->obd_req_replay_queue)) {
1466 req = list_entry(obd->obd_req_replay_queue.next,
1467 struct ptlrpc_request, rq_list);
1468 target_exp_dequeue_req_replay(req);
1469 list_del_init(&req->rq_list);
1470 obd->obd_requests_queued_for_recovery--;
1474 spin_unlock_bh(&obd->obd_processing_task_lock);
1478 static int check_for_next_lock(struct obd_device *obd)
1480 struct ptlrpc_request *req = NULL;
1483 spin_lock_bh(&obd->obd_processing_task_lock);
1484 if (!list_empty(&obd->obd_lock_replay_queue)) {
1485 req = list_entry(obd->obd_lock_replay_queue.next,
1486 struct ptlrpc_request, rq_list);
1487 CDEBUG(D_HA, "waking for next lock\n");
1489 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1490 CDEBUG(D_HA, "waking for completed lock replay\n");
1492 } else if (obd->obd_abort_recovery) {
1493 CDEBUG(D_HA, "waking for aborted recovery\n");
1496 spin_unlock_bh(&obd->obd_processing_task_lock);
1501 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1503 struct l_wait_info lwi = { 0 };
1504 struct ptlrpc_request *req;
1506 CDEBUG(D_HA, "Waiting for lock\n");
1507 l_wait_event(obd->obd_next_transno_waitq,
1508 check_for_next_lock(obd), &lwi);
1510 spin_lock_bh(&obd->obd_processing_task_lock);
1511 if (obd->obd_abort_recovery) {
1513 } else if (!list_empty(&obd->obd_lock_replay_queue)) {
1514 req = list_entry(obd->obd_lock_replay_queue.next,
1515 struct ptlrpc_request, rq_list);
1516 list_del_init(&req->rq_list);
1520 spin_unlock_bh(&obd->obd_processing_task_lock);
1524 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1526 struct ptlrpc_request *req;
1528 spin_lock_bh(&obd->obd_processing_task_lock);
1529 if (!list_empty(&obd->obd_final_req_queue)) {
1530 req = list_entry(obd->obd_final_req_queue.next,
1531 struct ptlrpc_request, rq_list);
1532 list_del_init(&req->rq_list);
1536 spin_unlock_bh(&obd->obd_processing_task_lock);
1540 static inline int req_replay_done(struct obd_export *exp)
1542 return (exp->exp_req_replay_needed == 0);
1545 static inline int lock_replay_done(struct obd_export *exp)
1547 return (exp->exp_lock_replay_needed == 0);
1550 static inline int connect_done(struct obd_export *exp)
1552 return (exp->exp_in_recovery != 0);
1555 static int check_for_clients(struct obd_device *obd)
1557 if (obd->obd_abort_recovery)
1559 LASSERT(obd->obd_connected_clients <= obd->obd_max_recoverable_clients);
1560 if (obd->obd_no_conn == 0 &&
1561 obd->obd_connected_clients == obd->obd_max_recoverable_clients)
1566 static int handle_recovery_req(struct ptlrpc_thread *thread,
1567 struct ptlrpc_request *req,
1568 svc_handler_t handler)
1573 rc = lu_context_init(&req->rq_session, LCT_SESSION);
1575 CERROR("Failure to initialize session: %d\n", rc);
1578 req->rq_session.lc_thread = thread;
1579 lu_context_enter(&req->rq_session);
1580 req->rq_svc_thread = thread;
1581 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
1583 /* thread context */
1584 lu_context_enter(&thread->t_env->le_ctx);
1586 lu_context_exit(&thread->t_env->le_ctx);
1588 lu_context_exit(&req->rq_session);
1589 lu_context_fini(&req->rq_session);
1590 /* don't reset timer for final stage */
1591 if (!req_replay_done(req->rq_export) ||
1592 !lock_replay_done(req->rq_export))
1593 reset_recovery_timer(class_exp2obd(req->rq_export),
1594 OBD_RECOVERY_FACTOR * AT_OFF ? obd_timeout :
1595 at_get(&req->rq_rqbd->rqbd_service->srv_at_estimate), 1);
1596 ptlrpc_free_clone(req);
1600 static void resume_recovery_timer(struct obd_device *obd)
1602 /* to be safe, make it at least OBD_RECOVERY_FACTOR * obd_timeout */
1603 reset_recovery_timer(obd, OBD_RECOVERY_FACTOR * obd_timeout, 1);
1606 static int target_recovery_thread(void *arg)
1608 struct obd_device *obd = arg;
1609 struct ptlrpc_request *req;
1610 struct target_recovery_data *trd = &obd->obd_recovery_data;
1611 struct l_wait_info lwi = { 0 };
1612 unsigned long delta;
1613 unsigned long flags;
1615 struct ptlrpc_thread fake_svc_thread, *thread = &fake_svc_thread;
1619 cfs_daemonize("tgt_recov");
1621 SIGNAL_MASK_LOCK(current, flags);
1622 sigfillset(¤t->blocked);
1624 SIGNAL_MASK_UNLOCK(current, flags);
1626 rc = lu_context_init(&env.le_ctx, LCT_MD_THREAD);
1630 thread->t_env = &env;
1631 env.le_ctx.lc_thread = thread;
1633 CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
1635 trd->trd_processing_task = current->pid;
1637 obd->obd_recovering = 1;
1638 complete(&trd->trd_starting);
1640 /* first of all, we have to know the first transno to replay */
1641 obd->obd_abort_recovery = 0;
1642 l_wait_event(obd->obd_next_transno_waitq,
1643 check_for_clients(obd), &lwi);
1645 spin_lock_bh(&obd->obd_processing_task_lock);
1646 target_cancel_recovery_timer(obd);
1647 spin_unlock_bh(&obd->obd_processing_task_lock);
1649 /* If some clients haven't connected in time, evict them */
1650 if (obd->obd_abort_recovery) {
1651 CWARN("Some clients haven't connect in time (%d/%d),"
1652 "evict them\n", obd->obd_connected_clients,
1653 obd->obd_max_recoverable_clients);
1654 obd->obd_abort_recovery = obd->obd_stopping;
1655 class_disconnect_stale_exports(obd, connect_done);
1657 /* next stage: replay requests */
1659 obd->obd_req_replaying = 1;
1660 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1661 atomic_read(&obd->obd_req_replay_clients),
1662 obd->obd_next_recovery_transno);
1663 resume_recovery_timer(obd);
1664 while ((req = target_next_replay_req(obd))) {
1665 LASSERT(trd->trd_processing_task == current->pid);
1666 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1667 lustre_msg_get_transno(req->rq_reqmsg),
1668 libcfs_nid2str(req->rq_peer.nid));
1669 handle_recovery_req(thread, req,
1670 trd->trd_recovery_handler);
1671 obd->obd_replayed_requests++;
1672 spin_lock_bh(&obd->obd_processing_task_lock);
1673 obd->obd_next_recovery_transno++;
1674 spin_unlock_bh(&obd->obd_processing_task_lock);
1677 spin_lock_bh(&obd->obd_processing_task_lock);
1678 target_cancel_recovery_timer(obd);
1679 spin_unlock_bh(&obd->obd_processing_task_lock);
1681 /* If some clients haven't replayed requests in time, evict them */
1682 if (obd->obd_abort_recovery) {
1683 CDEBUG(D_ERROR, "req replay timed out, aborting ...\n");
1684 obd->obd_abort_recovery = obd->obd_stopping;
1685 class_disconnect_stale_exports(obd, req_replay_done);
1686 abort_req_replay_queue(obd);
1689 /* The second stage: replay locks */
1690 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1691 atomic_read(&obd->obd_lock_replay_clients));
1692 resume_recovery_timer(obd);
1693 while ((req = target_next_replay_lock(obd))) {
1694 LASSERT(trd->trd_processing_task == current->pid);
1695 DEBUG_REQ(D_HA|D_WARNING, req, "processing lock from %s: ",
1696 libcfs_nid2str(req->rq_peer.nid));
1697 handle_recovery_req(thread, req,
1698 trd->trd_recovery_handler);
1699 obd->obd_replayed_locks++;
1702 spin_lock_bh(&obd->obd_processing_task_lock);
1703 target_cancel_recovery_timer(obd);
1704 spin_unlock_bh(&obd->obd_processing_task_lock);
1705 /* If some clients haven't replayed requests in time, evict them */
1706 if (obd->obd_abort_recovery) {
1708 CERROR("lock replay timed out, aborting ...\n");
1709 obd->obd_abort_recovery = obd->obd_stopping;
1710 stale = class_disconnect_stale_exports(obd, lock_replay_done);
1711 abort_lock_replay_queue(obd);
1714 /* We drop recoverying flag to forward all new requests
1715 * to regular mds_handle() since now */
1716 spin_lock_bh(&obd->obd_processing_task_lock);
1717 obd->obd_recovering = obd->obd_abort_recovery = 0;
1718 spin_unlock_bh(&obd->obd_processing_task_lock);
1719 /* The third stage: reply on final pings */
1720 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1721 while ((req = target_next_final_ping(obd))) {
1722 LASSERT(trd->trd_processing_task == current->pid);
1723 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1724 libcfs_nid2str(req->rq_peer.nid));
1725 handle_recovery_req(thread, req,
1726 trd->trd_recovery_handler);
1729 delta = (jiffies - delta) / HZ;
1730 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1731 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1732 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
1733 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
1734 if (delta > obd_timeout * 2) {
1735 CWARN("too long recovery - read logs\n");
1736 libcfs_debug_dumplog();
1739 target_finish_recovery(obd);
1741 lu_context_fini(&env.le_ctx);
1742 trd->trd_processing_task = 0;
1743 complete(&trd->trd_finishing);
1747 int target_start_recovery_thread(struct obd_device *obd, svc_handler_t handler)
1750 struct target_recovery_data *trd = &obd->obd_recovery_data;
1752 memset(trd, 0, sizeof(*trd));
1753 init_completion(&trd->trd_starting);
1754 init_completion(&trd->trd_finishing);
1755 trd->trd_recovery_handler = handler;
1757 if (kernel_thread(target_recovery_thread, obd, 0) > 0) {
1758 wait_for_completion(&trd->trd_starting);
1759 LASSERT(obd->obd_recovering != 0);
1766 void target_stop_recovery_thread(struct obd_device *obd)
1768 spin_lock_bh(&obd->obd_processing_task_lock);
1769 if (obd->obd_recovery_data.trd_processing_task > 0) {
1770 struct target_recovery_data *trd = &obd->obd_recovery_data;
1771 CERROR("%s: Aborting recovery\n", obd->obd_name);
1772 obd->obd_abort_recovery = 1;
1773 wake_up(&obd->obd_next_transno_waitq);
1774 spin_unlock_bh(&obd->obd_processing_task_lock);
1775 wait_for_completion(&trd->trd_finishing);
1777 spin_unlock_bh(&obd->obd_processing_task_lock);
1781 void target_recovery_fini(struct obd_device *obd)
1783 class_disconnect_exports(obd);
1784 target_stop_recovery_thread(obd);
1785 target_cleanup_recovery(obd);
1787 EXPORT_SYMBOL(target_recovery_fini);
1789 static void target_recovery_expired(unsigned long castmeharder)
1791 struct obd_device *obd = (struct obd_device *)castmeharder;
1792 LCONSOLE_WARN("%s: recovery timed out; %d clients never reconnected "
1793 "after %lds (%d clients did)\n",
1794 obd->obd_name, obd->obd_recoverable_clients,
1795 cfs_time_current_sec()- obd->obd_recovery_start,
1796 obd->obd_connected_clients);
1797 spin_lock_bh(&obd->obd_processing_task_lock);
1798 if (obd->obd_recovering)
1799 obd->obd_abort_recovery = 1;
1800 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1801 spin_unlock_bh(&obd->obd_processing_task_lock);
1804 void target_recovery_init(struct obd_device *obd, svc_handler_t handler)
1806 if (obd->obd_max_recoverable_clients == 0)
1809 CWARN("RECOVERY: service %s, %d recoverable clients, "
1810 "last_transno "LPU64"\n", obd->obd_name,
1811 obd->obd_max_recoverable_clients, obd->obd_last_committed);
1812 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
1813 obd->obd_recovery_start = 0;
1814 obd->obd_recovery_end = 0;
1815 obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout;
1816 /* bz13079: this should be set to desired value for ost but not for mds */
1817 obd->obd_recovery_max_time = OBD_RECOVERY_MAX_TIME;
1818 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
1819 target_start_recovery_thread(obd, handler);
1821 EXPORT_SYMBOL(target_recovery_init);
1825 int target_process_req_flags(struct obd_device *obd, struct ptlrpc_request *req)
1827 struct obd_export *exp = req->rq_export;
1828 LASSERT(exp != NULL);
1829 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1830 /* client declares he's ready to replay locks */
1831 spin_lock_bh(&obd->obd_processing_task_lock);
1832 if (exp->exp_req_replay_needed) {
1833 LASSERT(atomic_read(&obd->obd_req_replay_clients) > 0);
1834 spin_lock(&exp->exp_lock);
1835 exp->exp_req_replay_needed = 0;
1836 spin_unlock(&exp->exp_lock);
1837 atomic_dec(&obd->obd_req_replay_clients);
1838 LASSERT(obd->obd_recoverable_clients > 0);
1839 obd->obd_recoverable_clients--;
1840 if (atomic_read(&obd->obd_req_replay_clients) == 0)
1841 CDEBUG(D_HA, "all clients have replayed reqs\n");
1842 wake_up(&obd->obd_next_transno_waitq);
1844 spin_unlock_bh(&obd->obd_processing_task_lock);
1846 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1847 /* client declares he's ready to complete recovery
1848 * so, we put the request on th final queue */
1849 spin_lock_bh(&obd->obd_processing_task_lock);
1850 if (exp->exp_lock_replay_needed) {
1851 LASSERT(atomic_read(&obd->obd_lock_replay_clients) > 0);
1852 spin_lock(&exp->exp_lock);
1853 exp->exp_lock_replay_needed = 0;
1854 spin_unlock(&exp->exp_lock);
1855 atomic_dec(&obd->obd_lock_replay_clients);
1856 if (atomic_read(&obd->obd_lock_replay_clients) == 0)
1857 CDEBUG(D_HA, "all clients have replayed locks\n");
1858 wake_up(&obd->obd_next_transno_waitq);
1860 spin_unlock_bh(&obd->obd_processing_task_lock);
1866 int target_queue_recovery_request(struct ptlrpc_request *req,
1867 struct obd_device *obd)
1869 struct list_head *tmp;
1871 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1875 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
1876 /* Processing the queue right now, don't re-add. */
1880 target_process_req_flags(obd, req);
1882 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
1883 /* client declares he's ready to complete recovery
1884 * so, we put the request on th final queue */
1885 req = ptlrpc_clone_req(req);
1888 DEBUG_REQ(D_HA, req, "queue final req");
1889 spin_lock_bh(&obd->obd_processing_task_lock);
1890 if (obd->obd_recovering)
1891 list_add_tail(&req->rq_list, &obd->obd_final_req_queue);
1893 spin_unlock_bh(&obd->obd_processing_task_lock);
1894 ptlrpc_free_clone(req);
1895 if (obd->obd_stopping) {
1901 spin_unlock_bh(&obd->obd_processing_task_lock);
1904 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
1905 /* client declares he's ready to replay locks */
1906 req = ptlrpc_clone_req(req);
1909 DEBUG_REQ(D_HA, req, "queue lock replay req");
1910 spin_lock_bh(&obd->obd_processing_task_lock);
1911 LASSERT(obd->obd_recovering);
1912 /* usually due to recovery abort */
1913 if (!req->rq_export->exp_in_recovery) {
1914 spin_unlock_bh(&obd->obd_processing_task_lock);
1915 ptlrpc_free_clone(req);
1918 LASSERT(req->rq_export->exp_lock_replay_needed);
1919 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
1920 spin_unlock_bh(&obd->obd_processing_task_lock);
1921 wake_up(&obd->obd_next_transno_waitq);
1925 /* CAVEAT EMPTOR: The incoming request message has been swabbed
1926 * (i.e. buflens etc are in my own byte order), but type-dependent
1927 * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */
1930 CFS_INIT_LIST_HEAD(&req->rq_list);
1931 DEBUG_REQ(D_HA, req, "not queueing");
1935 spin_lock_bh(&obd->obd_processing_task_lock);
1937 /* If we're processing the queue, we want don't want to queue this
1940 * Also, if this request has a transno less than the one we're waiting
1941 * for, we should process it now. It could (and currently always will)
1942 * be an open request for a descriptor that was opened some time ago.
1944 * Also, a resent, replayed request that has already been
1945 * handled will pass through here and be processed immediately.
1947 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying: %i\n",
1948 obd->obd_next_recovery_transno, transno, obd->obd_req_replaying);
1949 if (transno < obd->obd_next_recovery_transno && obd->obd_req_replaying) {
1950 /* Processing the queue right now, don't re-add. */
1951 LASSERT(list_empty(&req->rq_list));
1952 spin_unlock_bh(&obd->obd_processing_task_lock);
1955 spin_unlock_bh(&obd->obd_processing_task_lock);
1957 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
1960 req = ptlrpc_clone_req(req);
1964 spin_lock_bh(&obd->obd_processing_task_lock);
1965 LASSERT(obd->obd_recovering);
1966 if (!req->rq_export->exp_in_recovery) {
1967 spin_unlock_bh(&obd->obd_processing_task_lock);
1968 ptlrpc_free_clone(req);
1971 LASSERT(req->rq_export->exp_req_replay_needed);
1973 if (target_exp_enqueue_req_replay(req)) {
1974 spin_unlock_bh(&obd->obd_processing_task_lock);
1975 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
1976 ptlrpc_free_clone(req);
1981 list_for_each(tmp, &obd->obd_req_replay_queue) {
1982 struct ptlrpc_request *reqiter =
1983 list_entry(tmp, struct ptlrpc_request, rq_list);
1985 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
1986 list_add_tail(&req->rq_list, &reqiter->rq_list);
1991 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
1993 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
1994 "has been claimed by another client");
1995 spin_unlock_bh(&obd->obd_processing_task_lock);
1996 target_exp_dequeue_req_replay(req);
1997 ptlrpc_free_clone(req);
2003 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2005 obd->obd_requests_queued_for_recovery++;
2006 wake_up(&obd->obd_next_transno_waitq);
2007 spin_unlock_bh(&obd->obd_processing_task_lock);
2011 struct obd_device * target_req2obd(struct ptlrpc_request *req)
2013 return req->rq_export->exp_obd;
2016 static inline struct ldlm_pool *ldlm_exp2pl(struct obd_export *exp)
2018 LASSERT(exp != NULL);
2019 return &exp->exp_obd->obd_namespace->ns_pool;
2023 * Packs current SLV and Limit into \a req.
2025 int target_pack_pool_reply(struct ptlrpc_request *req)
2027 struct obd_device *obd;
2031 * Check that we still have all structures alive as this may
2032 * be some late rpc in shutdown time.
2034 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2035 !exp_connect_lru_resize(req->rq_export))) {
2036 lustre_msg_set_slv(req->rq_repmsg, 0);
2037 lustre_msg_set_limit(req->rq_repmsg, 0);
2042 * OBD is alive here as export is alive, which we checked above.
2044 obd = req->rq_export->exp_obd;
2046 read_lock(&obd->obd_pool_lock);
2047 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2048 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2049 read_unlock(&obd->obd_pool_lock);
2054 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2056 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2057 DEBUG_REQ(D_ERROR, req, "dropping reply");
2062 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
2063 req->rq_status = rc;
2064 return (ptlrpc_send_error(req, 1));
2066 DEBUG_REQ(D_NET, req, "sending reply");
2069 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2072 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2075 struct ptlrpc_reply_state *rs;
2076 struct obd_device *obd;
2077 struct obd_export *exp;
2078 struct ptlrpc_service *svc;
2081 if (req->rq_no_reply) {
2086 svc = req->rq_rqbd->rqbd_service;
2087 rs = req->rq_reply_state;
2088 if (rs == NULL || !rs->rs_difficult) {
2090 target_send_reply_msg (req, rc, fail_id);
2095 /* must be an export if locks saved */
2096 LASSERT (req->rq_export != NULL);
2097 /* req/reply consistent */
2098 LASSERT (rs->rs_service == svc);
2101 LASSERT (!rs->rs_scheduled);
2102 LASSERT (!rs->rs_scheduled_ever);
2103 LASSERT (!rs->rs_handled);
2104 LASSERT (!rs->rs_on_net);
2105 LASSERT (rs->rs_export == NULL);
2106 LASSERT (list_empty(&rs->rs_obd_list));
2107 LASSERT (list_empty(&rs->rs_exp_list));
2109 exp = class_export_get (req->rq_export);
2112 /* disable reply scheduling onto srv_reply_queue while I'm setting up */
2113 rs->rs_scheduled = 1;
2115 rs->rs_xid = req->rq_xid;
2116 rs->rs_transno = req->rq_transno;
2117 rs->rs_export = exp;
2119 spin_lock(&obd->obd_uncommitted_replies_lock);
2121 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2122 rs->rs_transno, obd->obd_last_committed);
2123 if (rs->rs_transno > obd->obd_last_committed) {
2124 /* not committed already */
2125 list_add_tail (&rs->rs_obd_list,
2126 &obd->obd_uncommitted_replies);
2129 spin_unlock (&obd->obd_uncommitted_replies_lock);
2130 spin_lock (&exp->exp_lock);
2132 list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies);
2134 spin_unlock(&exp->exp_lock);
2136 netrc = target_send_reply_msg (req, rc, fail_id);
2138 spin_lock(&svc->srv_lock);
2140 svc->srv_n_difficult_replies++;
2143 /* error sending: reply is off the net. Also we need +1
2144 * reply ref until ptlrpc_server_handle_reply() is done
2145 * with the reply state (if the send was successful, there
2146 * would have been +1 ref for the net, which
2147 * reply_out_callback leaves alone) */
2149 ptlrpc_rs_addref(rs);
2150 atomic_inc (&svc->srv_outstanding_replies);
2153 if (rs->rs_transno <= obd->obd_last_committed ||
2154 (!rs->rs_on_net && !rs->rs_no_ack) ||
2155 list_empty(&rs->rs_exp_list) || /* completed already */
2156 list_empty(&rs->rs_obd_list)) {
2157 CDEBUG(D_HA, "Schedule reply immediately\n");
2158 list_add_tail (&rs->rs_list, &svc->srv_reply_queue);
2159 cfs_waitq_signal (&svc->srv_waitq);
2161 list_add (&rs->rs_list, &svc->srv_active_replies);
2162 rs->rs_scheduled = 0; /* allow notifier to schedule */
2165 spin_unlock(&svc->srv_lock);
2169 int target_handle_ping(struct ptlrpc_request *req)
2171 obd_ping(req->rq_export);
2172 return req_capsule_server_pack(&req->rq_pill);
2175 void target_committed_to_req(struct ptlrpc_request *req)
2177 struct obd_device *obd;
2179 if (req == NULL || req->rq_export == NULL)
2182 obd = req->rq_export->exp_obd;
2186 if (!obd->obd_no_transno && req->rq_repmsg != NULL)
2187 lustre_msg_set_last_committed(req->rq_repmsg,
2188 obd->obd_last_committed);
2190 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2191 "%d)", obd->obd_no_transno, req->rq_repmsg == NULL);
2193 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2194 obd->obd_last_committed, req->rq_transno, req->rq_xid);
2197 EXPORT_SYMBOL(target_committed_to_req);
2199 int target_handle_qc_callback(struct ptlrpc_request *req)
2201 struct obd_quotactl *oqctl;
2202 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2204 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2205 if (oqctl == NULL) {
2206 CERROR("Can't unpack obd_quotactl\n");
2210 cli->cl_qchk_stat = oqctl->qc_stat;
2215 #ifdef HAVE_QUOTA_SUPPORT
2216 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2219 struct obd_device *obd = req->rq_export->exp_obd;
2220 struct obd_device *master_obd;
2221 struct obd_device_target *obt;
2222 struct lustre_quota_ctxt *qctxt;
2223 struct qunit_data *qdata = NULL;
2227 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2230 rc = req_capsule_server_pack(&req->rq_pill);
2232 CERROR("packing reply failed!: rc = %d\n", rc);
2236 LASSERT(req->rq_export);
2238 OBD_ALLOC(qdata, sizeof(struct qunit_data));
2241 rc = quota_get_qdata(req, qdata, QUOTA_REQUEST, QUOTA_EXPORT);
2243 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2247 /* we use the observer */
2248 if (!obd->obd_observer || !obd->obd_observer->obd_observer) {
2249 CERROR("Can't find the observer, it is recovering\n");
2250 req->rq_status = -EIO;
2251 GOTO(send_reply, rc = -EIO);
2254 master_obd = obd->obd_observer->obd_observer;
2255 obt = &master_obd->u.obt;
2256 qctxt = &obt->obt_qctxt;
2258 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2259 /* quota_type has not been processed yet, return EAGAIN
2260 * until we know whether or not quotas are supposed to
2262 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2264 req->rq_status = -EAGAIN;
2265 rc = ptlrpc_reply(req);
2269 down_read(&obt->obt_rwsem);
2270 if (qctxt->lqc_lqs_hash == NULL) {
2271 up_read(&obt->obt_rwsem);
2272 /* quota_type has not been processed yet, return EAGAIN
2273 * until we know whether or not quotas are supposed to
2275 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2277 req->rq_status = -EAGAIN;
2278 rc = ptlrpc_reply(req);
2282 LASSERT(qctxt->lqc_handler);
2283 rc = qctxt->lqc_handler(master_obd, qdata,
2284 lustre_msg_get_opc(req->rq_reqmsg));
2285 up_read(&obt->obt_rwsem);
2286 if (rc && rc != -EDQUOT)
2287 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2288 "dqacq failed! (rc:%d)\n", rc);
2289 req->rq_status = rc;
2291 /* there are three forms of qunit(historic causes), so we need to
2292 * adjust the same form to different forms slaves needed */
2293 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2295 CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc);
2299 /* Block the quota req. b=14840 */
2300 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2302 rc = ptlrpc_reply(req);
2304 OBD_FREE(qdata, sizeof(struct qunit_data));
2308 #endif /* !__KERNEL__ */
2310 #endif /* HAVE_QUOTA_SUPPORT */
2312 ldlm_mode_t lck_compat_array[] = {
2313 [LCK_EX] LCK_COMPAT_EX,
2314 [LCK_PW] LCK_COMPAT_PW,
2315 [LCK_PR] LCK_COMPAT_PR,
2316 [LCK_CW] LCK_COMPAT_CW,
2317 [LCK_CR] LCK_COMPAT_CR,
2318 [LCK_NL] LCK_COMPAT_NL,
2319 [LCK_GROUP] LCK_COMPAT_GROUP,
2320 [LCK_COS] LCK_COMPAT_COS,
2324 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2325 * not escape to the user level.
2327 int ldlm_error2errno(ldlm_error_t error)
2335 case ELDLM_LOCK_CHANGED:
2338 case ELDLM_LOCK_ABORTED:
2341 case ELDLM_LOCK_REPLACED:
2344 case ELDLM_NO_LOCK_DATA:
2347 case ELDLM_NAMESPACE_EXISTS:
2350 case ELDLM_BAD_NAMESPACE:
2354 if (((int)error) < 0) /* cast to signed type */
2355 result = error; /* as ldlm_error_t can be unsigned */
2357 CERROR("Invalid DLM result code: %i\n", error);
2363 EXPORT_SYMBOL(ldlm_error2errno);
2366 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2368 ldlm_error_t ldlm_errno2error(int err_no)
2377 error = ELDLM_LOCK_CHANGED;
2380 error = ELDLM_LOCK_ABORTED;
2383 error = ELDLM_LOCK_REPLACED;
2386 error = ELDLM_NO_LOCK_DATA;
2389 error = ELDLM_NAMESPACE_EXISTS;
2392 error = ELDLM_BAD_NAMESPACE;
2399 EXPORT_SYMBOL(ldlm_errno2error);